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WO2023185285A1 - Battery - Google Patents

Battery Download PDF

Info

Publication number
WO2023185285A1
WO2023185285A1 PCT/CN2023/075910 CN2023075910W WO2023185285A1 WO 2023185285 A1 WO2023185285 A1 WO 2023185285A1 CN 2023075910 W CN2023075910 W CN 2023075910W WO 2023185285 A1 WO2023185285 A1 WO 2023185285A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery core
receiving member
side plate
tab
battery
Prior art date
Application number
PCT/CN2023/075910
Other languages
French (fr)
Chinese (zh)
Inventor
卫志达
彭宁
Original Assignee
珠海冠宇电池股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海冠宇电池股份有限公司 filed Critical 珠海冠宇电池股份有限公司
Publication of WO2023185285A1 publication Critical patent/WO2023185285A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to the field of electrochemical energy storage devices, and in particular to a battery.
  • lithium-ion batteries have the advantages of large capacity, small size, light weight and environmental protection, and have been widely used in industries such as digital electronic products and electric vehicles.
  • the invention provides a battery that can improve the sealing performance, safety and other properties of the battery.
  • the invention provides a battery, which includes: a casing, which is surrounded by a cavity; the casing includes a first side plate; a battery core located in the cavity, and the battery core is provided with a first tab; and an external connection piece. , electrically connected to the first tab, the external piece is located on the side of the first side plate away from the cavity, the external piece includes an outwardly protruding pole, the first side
  • the plate includes a second through hole corresponding to the pole, and the pole is connected to the first tab through the second through hole; along the direction from the first side plate to the battery core , the diameter of the pole shows an increasing or decreasing trend.
  • the battery further includes a first receiving member located between the first side plate and the battery core, and the first receiving member is electrically connected to the first tab, so The first receiving member is provided with a first through hole corresponding to the pole, and the pole is connected to the first receiving member through the first through hole.
  • the first through hole of the first receiving member includes a first hole section and a second hole section connected to each other, and the second hole section is located near the first hole section and close to the first hole section.
  • One side of the battery core; one end of the pole close to the battery core extends outward to form an extension portion corresponding to the second hole section.
  • an end surface of the pole close to the battery core is flush with a side surface of the first receiving member close to the battery core.
  • one end of the pole close to the battery core extends out of the first through hole, and extends outward along the circumferential direction of the first through hole to form a connection with the first socket.
  • the parts are close to the outer extension of one side surface of the battery core.
  • a first insulation piece is further provided between the external piece and the first side plate, and a second insulation piece is further provided between the first receiving member and the first side plate.
  • sheet, the pole penetrates the first insulating sheet and the second insulating sheet; and/or, a first insulating layer is provided between the pole and the first side plate; and/or, A second insulation layer is provided between the first receiving member and the battery core.
  • the housing further includes a sixth side plate connected to the first side plate;
  • the second insulating sheet includes a first insulating part and a second insulating part, and the first insulating
  • the pole is located between the first receiving part and the first side plate, and the pole penetrates the first insulating part;
  • the second insulating part is located between the first receiving part and the sixth side between the boards.
  • the projection of the second insulating part on the sixth side plate covers the projection of the first receiving member on the sixth side plate; and/or the first The projection of the insulating part on the first side plate covers the projection of the first receiving member on the first side plate; and/or, the gap between the first insulating part and the second insulating part
  • the included angle range is 80° ⁇ 120°.
  • the projection of the first insulating sheet on the first side panel covers the projection of the external connecting sheet on the first side panel.
  • the battery core includes a plurality of stacked electrode sheets, and the battery core has a first side and a second side arranged oppositely, wherein the second insulating layer extends to the electrode sheet.
  • the first side of the core is bonded to the electrode sheet located on the first side of the battery core, and/or the second insulating layer extends to the second side of the battery core and is bonded to the electrode sheet located on the first side of the battery core.
  • the electrode sheet on the second side is bonded.
  • the projection of the first receiving member on the first side plate does not overlap with the projection of the first tab on the first side plate.
  • the housing includes a second side plate connected to the first side plate, and the projection of the first receiving member on the second side plate is in line with the first pole.
  • the projections of the ears on the second side panel at least partially overlap.
  • the end surface of the side of the battery core provided with the first tab is parallel to the thickness direction of the battery core; and/or, the first tab is away from the battery core.
  • the distance from one side to the side where the first tab is connected to the battery core is no longer than the length of the first receiving member along the direction from the first side plate to the first tab; and /Or, along the direction from the first side plate to the first tab, the length of the first receiving member is 1mm-3mm.
  • the battery further includes a first middle piece located between the battery core and the first side plate, and the first middle piece is connected to the first tab and the first side plate respectively.
  • the first receiving piece is connected.
  • the first intermediate piece includes a first connecting piece connected to the first receiving member, and a third connecting piece connected to a side of the first tab away from the battery core.
  • Four connecting pieces are provided.
  • the first middle piece further includes a first connection component connected to the first connection piece and the fourth connection piece respectively;
  • the first connection component includes a second connection piece and a third connection piece.
  • Three connecting pieces; the second connecting piece is located between the first receiving member and the battery core; in the direction from the first receiving member to the first tab, the third connecting piece Located between the first pole tab and the first receiving member; the first connecting piece, the second connecting piece, the third connecting piece, and the fourth connecting piece are connected in sequence.
  • the first connecting piece includes a first connecting portion connected to the first receiving member and a second connecting portion extending along the extending direction of the first side plate, and the The second connecting part is connected to the fourth connecting piece.
  • a sixth insulating layer is provided on a side of the first connecting piece facing away from the first receiving member; and/or, the first receiving member is opposite to the first connecting piece.
  • a first included angle is formed between the connecting side and the side connecting the fourth connecting piece and the first tab, and the range of the first included angle is 80-120°; and/or, the The first connecting piece is welded to the first receiving member; and/or the battery core includes a plurality of stacked electrode sheets, and the side of the first connecting piece that is in contact with the first receiving member and the The surfaces of the electrode sheets are parallel.
  • the battery further includes a third insulating layer located between the first middle member and the first side plate.
  • the third insulating layer includes a first portion located on a side of the fourth connecting piece facing away from the first tab.
  • the battery core includes a plurality of stacked electrode sheets; the battery core has a first side and a second side arranged oppositely; the third insulating layer further includes a layer from the first part. a second part extending from an end close to the first side of the battery core in a direction close to the battery core; and from an end of the first part close to the second side of the battery core in a direction close to the battery core The extension forms the third part.
  • the projection of the first tab in the thickness direction of the battery core is located within the projection of the second part of the third insulating layer in the thickness direction of the battery core, and /or,
  • the projection of the first tab in the thickness direction of the battery core is located within the projection of the third part of the third insulating layer in the thickness direction of the battery core; and/or the first pole
  • the projection of the ear in the length direction of the battery core is located within the projection of the first part of the third insulating layer in the length direction of the battery core.
  • the second part of the third insulating layer extends to the first side of the battery core and is bonded to the electrode sheet located on the first side of the battery core; and/or, the The third part of the third insulating layer extends to the second side of the battery core and is bonded to the electrode sheet located on the second side of the battery core.
  • the battery core includes a plurality of stacked electrode sheets, the electrode sheets include a first current collector, and the first tab is disposed on the first current collector; along the In the direction from the first receiving member to the battery core, the distance between the first receiving member and the first current collector is less than 1 mm.
  • the battery core is further provided with a second tab, and the second tab has an opposite polarity to the first tab;
  • the battery further includes a second receiving member, and the The second receiving member is electrically connected to the second tab.
  • the second receiving member is disposed between the first side plate and the battery core.
  • the second receiving member is on the first side plate. The projection of does not overlap with the projection of the second tab on the first side plate.
  • the housing includes a second side plate connected to the first side plate, and the projection of the first pole on the second side plate is consistent with the second pole.
  • the projection of the ear on the second side panel at least partially overlaps; and/or the projection of the second receiving member on the second side panel and the projection of the second pole tab on the second side panel The projections at least partially overlap.
  • the battery further includes a first receiving member located between the first side plate and the battery core, and the first receiving member is electrically connected to the first tab, so The first pole tab and the second pole tab are located between the first receiving member and the second receiving member; and/or, the second receiving member is welded to the first side plate; and/or, Place The distance from the side of the second tab away from the battery core to the side of the second tab connected to the battery core is no longer than the distance from the second receiving member along the first side plate to the side of the battery core.
  • the length in the direction of the second pole tab; and/or, along the direction from the first side plate to the second pole tab, the length of the second receiving member is 1mm-4mm; and/or, along the In the direction from the first side plate to the second pole tab, the length of the second receiving member is equal to or greater than the length of the first receiving member.
  • the battery core has a first surface and a second surface arranged oppositely, and a side surface located between the first surface and the second surface, and at least one side surface of the battery core At least part of the area is provided with a protective adhesive layer.
  • the battery core includes a plurality of stacked electrode sheets, and the protective adhesive layer of the battery core extends to the first surface of the battery core and is in contact with the first surface of the battery core.
  • the electrode sheet is bonded and/or extended to the second side of the battery core and bonded to the electrode sheet located on the second side of the battery core.
  • the protective adhesive layer is provided with one or more fifth through holes.
  • the first tab is a positive tab or a negative tab; and/or, the battery core includes a laminated battery core or a wound battery core.
  • the first receiving member is electrically connected to the first pole, so that the external connecting piece is connected to the first receiving member through the pole, thereby eliciting the electrical properties of the first pole, wherein the control pole has a tapered structure (i.e. Along the direction from the first side plate to the first socket, the diameter of the pole shows an increasing or decreasing trend), which can improve the connection stability and sealing performance between the external piece, the first side plate and the first socket. , thereby improving the sealing, safety, stability and service life of the battery.
  • Figure 1 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention
  • Figure 2 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention
  • Figure 3 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention
  • Figure 4 is a schematic structural diagram of an external connecting piece and a pole according to an embodiment of the present invention.
  • Figure 5 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention.
  • Figure 6 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention.
  • Figure 7 is a schematic structural diagram of a second insulating sheet according to an embodiment of the present invention.
  • Figure 8 is a schematic diagram of the connection structure between the cell tabs and the receiving member according to one embodiment of the present invention.
  • Figure 9 is a schematic diagram showing the connection structure of the first tab and the first receiving member according to an embodiment of the present invention.
  • Figure 10 is a schematic diagram showing the connection structure of the first tab, the first receiving member and the third insulating layer according to an embodiment of the present invention
  • Figure 11 is a schematic structural diagram of a battery core package according to an embodiment of the present invention.
  • Figure 12 is a schematic structural diagram of a battery core package according to an embodiment of the present invention.
  • Figure 13 is a schematic structural diagram of a battery according to an embodiment of the present invention.
  • the terms “set”, “installation”, “connection”, “connected”, “connected”, etc. should be understood in a broad sense.
  • it can be a fixed connection or a fixed connection.
  • It can be a detachable connection or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection (network connection); it can be a direct connection, an indirect connection through an intermediary, or two components are internally connected.
  • the above-mentioned specific meanings in the present invention can be understood in specific situations.
  • Batteries are commonly used electrochemical energy storage devices. They generally include a casing, a battery core packaged in a cavity surrounded by the casing, etc.
  • the battery core is provided with tabs (such as the first tab below), which require A conductive component (such as an external piece with a pole as described below) penetrates the case to lead out the electricity from the tab in the cavity to form an electrode of the battery.
  • a conductive component such as an external piece with a pole as described below
  • the connection structure of conventional conductive components has poor sealing.
  • an embodiment of the present invention provides a battery, as shown in Figures 1 to 13.
  • the battery includes: a housing 1, which is surrounded by a cavity; the housing 1 includes a first side plate 11; a battery core 2, Located in the cavity, the battery core 2 is provided with a first tab 21; an external connecting piece 41 is electrically connected to the first tab 21.
  • the external connecting piece 41 is located on the side of the first side plate 11 away from the cavity.
  • the external connecting piece 41 includes an external
  • the poles 42 formed by protrusions and the first side plate 11 include second through holes 110 corresponding to the poles 42.
  • the poles 42 communicate with the first pole through the second through holes 110 (that is, through the first side plate 11).
  • the ears 21 are connected; along the direction from the first side plate 11 to the battery core 2, the diameter of the pole 42 shows an increasing or decreasing trend, thereby improving the sealing performance of the battery.
  • the pole posts 42 are generally formed to protrude outward along the thickness direction of the external connection piece 41 , that is, the axial direction of the pole pole 42 is parallel to the thickness direction of the external connection piece 41 .
  • the cross section of the pole 42 perpendicular to the axial direction of the pole 42 is circular, and the straight section of the pole 42 is circular.
  • the diameter is the diameter of the cross section of the pole 42 perpendicular to the axial direction of the pole 42 .
  • the pole 42 passes through the second through hole 110 to achieve penetration of the first side plate 11 .
  • the battery also includes a first receiving member 31 electrically connected to the first tab 21.
  • the first receiving member 31 is disposed between the first side plate and the battery core 2; the first receiving member 31 is provided with a corresponding pole 42.
  • the pole 42 is connected to the first receiving member 31 through the first through hole 310 provided, and the second through hole 110 and the first through hole 310 may be coaxially arranged.
  • the pole 42 The diameter of the diameter shows a changing trend (ie, an increasing or decreasing trend), and the change may be a gradual change, that is, a uniform increase or decrease with substantially the same amplitude.
  • the aperture (diameter) of the second through hole 110 and the first through hole 310 changes correspondingly with the diameter of the pole 42 .
  • the diameter of the pole 42 gradually increases.
  • the diameters of the second through hole 110 and the first through hole 310 also gradually increase; along the direction from the first side plate 11 to the first receiving member 31, the diameter of the pole 42 gradually decreases, at this time the diameter of the pole 42 gradually decreases.
  • the diameters of the second through hole 110 and the first through hole 310 are also gradually reduced.
  • the first through hole 310 of the first receiving member 31 includes a first hole segment and a second hole segment that are connected to each other, and the second hole segment is located close to the first hole segment.
  • an end of the pole 42 close to the battery core 2 extends outward to form an extension 43 corresponding to the second hole section.
  • first hole section and the second hole section can be arranged coaxially, the first hole section and the second hole section are both circular through holes, and the diameter of the second hole section is larger than that of the first hole section and the second hole section.
  • the diameter of one end of the connection preferably, the diameter of the second hole segment is larger than the diameter of the first hole segment, and the axial projection of the second hole segment perpendicular to the first through hole 310 can cover the first hole segment perpendicular to the first through hole 310.
  • the cross-sectional area of the external piece 41 perpendicular to the axial direction of the pole 42 can be larger than the cross-sectional area of the pole 42 perpendicular to the axial direction of the pole 42 , and the projection of the external piece 41 perpendicular to the axial direction of the pole 42 covers the pole.
  • the projection of the pole 42 perpendicular to the axial direction of the pole 42, the cross-sectional area of the extension 43 perpendicular to the pole 42 is larger than the cross-sectional area of the pole 42 perpendicular to the axial direction of the pole 42, the extension 43 is perpendicular to the pole 42
  • the axial projection covers the axial projection of the pole 42 perpendicular to the pole 42
  • the cross-sectional area of the external piece 41 perpendicular to the axial direction of the pole 42 is larger than the cross-sectional area of the extension 43 perpendicular to the axial direction of the pole 42
  • the projection of the external piece 41 perpendicular to the axial direction of the pole 42 covers the projection of the extension 43 perpendicular to the axial direction of the pole 42
  • the cross-sectional area of the extension 43 perpendicular to the axial direction of the pole 42 is substantially equal to the second hole section With a cross-sectional area perpendicular to the axial direction of the pole 42, the extension 43 is engaged
  • an end surface of the pole 42 close to the battery core 2 may be flush with a surface of the first receiving member 31 close to the battery core 2 .
  • the thickness of the extension portion 43 along the axial direction of the first through hole 310 is substantially equal to the depth of the second hole segment along the axial direction of the first through hole 310 , whereby the extension portion 43 is buckled in the second hole section, and the end surface of the extension portion 43 close to the battery core 2 is flush with the surface of the first receiving member 31 facing the battery core 2, which not only ensures the connection between the pole post 42 and the first receiving member 31
  • the bonding strength is high, and the pole post 42 is prevented from interfering with the first pole lug 21 or the connection between the first connecting piece 51 and the first receiving member 31 .
  • the end of the pole 42 close to the battery core 2 can also extend out of the first through hole 310 and extend outward along the circumferential direction of the first through hole 310 to form a side surface of the first receiving member 31 close to the battery core 2
  • the connected extension part 43 is the pole 42
  • the end surface close to the battery core 2 is not flush with the side surface of the first receiving member 31 facing the battery core 2 , but is located between the first receiving member 31 and the battery core 2 .
  • the epitaxial sheet, pole post 42, and epitaxial portion 43 can be integrally formed, and they can be made of metal.
  • the first receiving member 31 and the first side plate 11 can be riveted through rivets. After riveting, the rivets are located at One end of the first side plate 11 away from the cavity forms an external piece 41 , the other end forms an extension 43 , and the portion between the two ends forms a pole 42 , and the formed pole 42 is, for example, a tapered structure.
  • the first tab 21 can be electrically connected to the housing 1 , and at this time, the external connecting piece 41 , the pole post 42 , and the first receiving member 31 can be in direct contact with the housing 1 .
  • the first tab 21 is insulated from the casing 1 , specifically by providing an insulating sheet (insulating layer).
  • a first insulating sheet 6 is disposed between the external piece 41 and the first side plate 11, and the first receiving member 31 and There is also a second insulating sheet 7 between the first side plates 11, that is, the external connecting sheet 41, the first insulating sheet 6, the first side plate 11, the second insulating sheet 7, and the first receiving member 31 are stacked in sequence.
  • 42 penetrates the first insulating sheet 6 and the second insulating sheet 7;
  • a first insulating layer 81 is provided between the pole 42 and the first side plate 11, whereby the external connecting piece 41, the pole 42, and the first receiving member 31 It is electrically connected to the first tab 21 and insulatedly connected to the first side plate 11 (casing 1).
  • the difference between the diameter of the first through hole 310 and the diameter of the pole 42 is substantially equal to the width of the first insulating layer 81 along the circumferential direction of the first through hole 310 .
  • the circumferential direction of the hole 310 is perpendicular to the axial direction of the first through hole 310 .
  • the first insulating layer 81 can be integrally formed with the first insulating sheet 6 , and the first insulating layer 81 protrudes outward from the side of the first insulating sheet 6 close to the first side plate 11 (into the second through hole 110 protrusions); or the first insulating layer 81 can be integrally formed with the second insulating sheet 7, and the first insulating layer 81 protrudes outward from the side of the second insulating sheet close to the first side plate (toward the second through hole 110 Inner bulge) is formed.
  • the first insulating sheet 6 is provided with a third through hole 60, and the pole post 42 passes through the third through hole 60 to penetrate the first insulating sheet 6; the second insulating sheet 7 is provided with a fourth through hole 70, The pole post 42 passes through the fourth through hole 70 to penetrate the second insulating sheet 7 .
  • the pole 42 passes through the third through hole 60 , the second through hole 110 , the fourth through hole 70 , and the first through hole 310 in order to achieve connection with the first receiving member 31 .
  • the third through hole 60 , the second through hole 110 , the fourth through hole 70 and the first through hole 310 may be coaxially arranged.
  • the projection of the first insulating sheet 6 on the first side panel 11 can cover the projection of the external sheet 41 on the first side panel 11 (i.e. The projection of the external piece 41 on the first side plate 11 is within the projection of the first insulating piece 6 on the first side plate 11 ), thereby preventing the external piece 41 from contacting the housing 1 and ensuring the insulation of the housing.
  • the projection of the second insulating sheet 7 on the first side panel 11 can cover the projection of the first receiving member 31 on the first side panel 11 (that is, the projection of the first receiving member 31 on the first side panel 11 is The second insulating sheet 7 is within the projection of the first side plate 11 ), thereby preventing the first receiving member 31 from contacting the housing 1 and ensuring the insulation of the housing.
  • battery performance such as safety and stability can be further improved.
  • the housing 1 also includes a sixth side plate 16 connected to the first side plate 11.
  • the second insulating sheet 7 can be an L-shaped structure, which includes a connected first insulating part 71 and a third insulating part 71.
  • the second insulating part 72, the first insulating part 71 is located at the Between a receiving member 31 and the first side plate 11, the pole 42 penetrates the first insulating part 71, that is, the first insulating part 71 is provided with a fourth through hole 70 corresponding to the pole 42, and the second insulating part 72 is located between the first receiving member 31 and the sixth side plate 16. Therefore, the second insulating part 72 can provide support for the first receiving member 31, and can connect the first receiving member 31 with the third side of the housing 1.
  • the six side plates 16 are insulated to improve the safety and stability of the battery.
  • the projection of the first insulating part 71 on the first side panel 11 can cover the projection of the first receiving member 31 on the first side panel 11 (that is, the projection of the first receiving member 31 on the first side panel 11 is The projection of the first insulating part 71 on the first side panel 11), and the projection of the second insulating part 72 on the sixth side panel 16 can cover the projection of the first receiving member 31 on the sixth side panel 16 (i.e. The projection of the first receiving part 31 on the sixth side plate 16 is within the projection of the second insulating part 72 on the sixth side plate 16) to prevent the first receiving part 31 from contacting the first side plate 11 or the sixth side plate. 16 contacts.
  • the surface of the sixth side plate 16 is parallel to the surface of the electrode sheet; the surface of the sixth side plate 16 and the first side plate 11 are not parallel, for example, perpendicular; the surface of the sixth side plate 16 and the second side plate 12 are not parallel. , such as vertical; the sixth side plate 16 may be, for example, a bottom side plate (or bottom plate).
  • an included angle is formed between the surface of the first insulating part 71 and the first receiving member 31 and the surface of the second insulating part 72 and the first receiving member 31.
  • the included angle may range from 80° to 80°. 140°, such as 80°, 90°, 100°, 110°, 120°, 130°, 140°, etc., that is, the two are not parallel, such as perpendicular.
  • the included angle formed between the first insulating part 71 and the second insulating part 72 (the plane where they are located) may range from 80° to 140°, such as 80°, 90°, 100°, 110°, 120°, 130°. , 140°, etc., that is, they are not parallel, such as perpendicular.
  • the projection of the first receiving member 31 on the first side plate 11 does not overlap with the projection of the first tab 21 on the first side plate 11 (that is, the first receiving member 31 is parallel to the first side plate 11 ).
  • the projection of the extension direction of the first side plate 11 does not overlap with the projection of the first tab 21 parallel to the extension direction of the first side plate 11). Therefore, the first tab 21 and the first receiving member 31 do not extend along the direction of the battery core. 2 is distributed in the direction from the first side plate 11 to the battery core 2.
  • the distance from the first side plate 11 to the battery core 2 is a 1
  • the first tab 21 The distance from the side connected to the battery core 2 to the side of the first tab 21 facing away from the battery core 2 (that is, the side facing the first side plate 11 ) is b 1
  • the first receiving member 31 faces the side of the battery core 2
  • One side (that is, the side away from the first side plate 11 ) to the side of the first receiving member 31 facing the first side plate 11 (that is, the first receiving member 31 is in the direction along the first side plate 11 to the battery core 2 length) is c 1 , a 1 ⁇ b 1 +c 1 , therefore, compared with the prior art in which the pole tabs and receiving members are arranged along the length direction of the housing, the technical solution of this embodiment can make the battery core The space between the first side plate and the first side plate is fully utilized, which can save the cavity space, thereby increasing the size of the battery core and improving the energy density and
  • the extension direction of the first side plate 11 is parallel to the surface of the first side plate 11 , and the direction from the first side plate 11 to the battery core 2 can be parallel to the length direction of the housing 1 .
  • the extending direction may be the width direction of the housing 1 or the thickness direction of the housing 1 .
  • the extending direction of the first side plate 11 is the width direction of the housing 1 .
  • the length direction of the housing 1 is also the length direction of the battery core 2
  • the width direction of the housing 1 is also the width direction of the battery core 2
  • the thickness direction of the housing 1 is also the thickness direction of the battery core 2.
  • the battery core 2 may include a plurality of stacked electrode sheets. The electrode sheets are stacked along the thickness direction of the battery core 2 . That is, the thickness direction of the battery core 2 is also the electrode sheet. thickness direction.
  • the housing 1 includes a second side plate 12 connected to the first side plate 11 .
  • the projection of the first receiving member 31 on the second side plate 12 is consistent with the position of the first tab 21 on the second side plate 12 .
  • the projections on the two side plates 12 at least partially overlap (that is, the projection of the first receiving member 31 perpendicular to the extension direction of the first side plate 11 and the projection of the first tab 21 perpendicular to the extension direction of the first side plate 11 at least partially overlap.
  • the first receiving member 31 and the first tab 21 are distributed along the extending direction of the first side plate 11 , thereby facilitating the connection between the first receiving member 31 and the first tab 21 , further saving the cavity space, and improving the Battery energy density and other properties.
  • the surface of the second side plate 12 may be perpendicular to the surface of the first side plate 11
  • the surface of the second side plate 12 may be perpendicular to the surface of the sixth side plate 16
  • the surface of the second side plate 12 may be perpendicular to the surface of the electrode sheet. Vertical (parallel to the thickness direction of the electrode sheet).
  • the projection of the first receiving member 31 perpendicular to the width direction of the battery core 2 at least partially overlaps with the projection of the first tab 21 perpendicular to the width direction of the battery core 2 . , that is, the first receiving member 31 and the first tab 21 are distributed along the width direction of the battery core 2 .
  • the distance from the side of the first tab 21 away from the battery core 2 to the side where the first tab 21 is connected to the battery core 2 is no longer than the distance from the first receiving member 31 to the first side plate 11 along the first side plate 11 .
  • the length of one pole lug 21 (that is, the length of the first receiving member 31 in the direction along the first side plate 11 to the first pole lug 21 ), that is, increasing the length of the first receiving member 31 on the second side plate 12 ), that is, increasing the length of the first receiving member 31 on the second side plate 12
  • the overlap area between the projection of the first tab 21 and the projection of the first tab 21 on the second side plate 12 is thereby achieved to protect the first tab 21 in the width direction of the battery core and prevent the first tab 21 from falling or falling of the battery. It falls off during the collision, and at the same time, the area of the electrode sheet of the battery core can be further expanded, which is beneficial to further improving the battery energy density and other performance.
  • the length c1 of the first receiving member 31 in the direction from the first side plate 11 to the first tab 21 is 1 mm to 3 mm, such as 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.
  • the first receiving member 31 may be block-shaped (or called a first adapter block), and its thickness direction may be parallel to the direction from the first side plate 11 to the first tab 21 , that is, the first receiving member 31 is in the shape of a block.
  • the length along the direction from the first side plate 11 to the first tab 21 is the thickness of the first receiving member 31 .
  • the above-mentioned battery may also include a first middle piece located between the battery core 2 and the first side plate 11 .
  • the first middle piece is connected to the first tab 21 and the first receiving member 31 respectively (i.e., the first receiving member 31
  • the first middle piece is connected to the first tab 21), specifically, the first receiving piece 31, the first middle piece, and the first tab 21 can be welded in sequence.
  • the first middle piece may include a first connecting piece 51 connected to the first receiving member 31 and a fourth connecting piece 54 connected to a side of the first tab 21 away from the battery core 2 .
  • the first middle piece may have a bent structure, the first connecting piece 51 is connected to the first receiving member 31, and the fourth connecting piece 54 is connected to the first tab 21.
  • a first included angle is formed between the side of the first receiving member 31 that connects to the first connecting piece 51 and the side that connects the fourth connecting piece 54 to the first tab 21 , and the range of the first included angle is 80 -140°, such as 80°, 90°, 100°, 120°, 130°, 140°, etc., that is, the side where the first receiving member 31 is connected to the first connecting piece 51 and the fourth connecting piece 54 is connected to the first pole.
  • the connecting surfaces of the ears 21 are not parallel, for example vertical.
  • the contact surface between the first receiving member 31 and the first connecting piece 51 and the connecting surface between the fourth connecting piece 54 and the first tab 21 are connected.
  • the contact surfaces are staggered so that the two contact surfaces are basically arranged along the width direction of the battery core, which not only reduces the space occupied by the first receiving member 31 and the first connecting piece 51 in the cavity, but also makes the first receiving member
  • the connection between the member 31 and the first connecting piece 51 and the connection between the fourth connecting piece 54 and the first tab 21 do not interfere with each other, and the connection between the first receiving member 31 and the first tab 21 through the first intermediate piece can be further improved. Stability, thereby improving the stability, safety and service life of the battery.
  • a third included angle is formed between the side of the first receiving member 31 that is in contact with the first connecting piece 51 and the side of the first receiving member 31 facing the first side plate 11 , and the range of the third included angle is 80-140. °, such as 80°, 90°, 100°, 120°, 130°, 140°, that is, the two are not parallel, for example, they can be perpendicular.
  • the side of the first receiving member 31 that is in contact with the first connecting piece 51 is, for example, the top surface of the first receiving member 31 .
  • the battery core 2 includes a plurality of stacked electrode sheets, and the side of the first connecting sheet 51 that is in contact with the first receiving member 31 may be parallel to the surface of the electrode sheets.
  • the first middleware further includes a first connecting component connected to the first connecting piece 51 and the fourth connecting piece 54 respectively.
  • the first connecting component includes a second connecting piece 52 and a fourth connecting piece 54 .
  • the third connecting piece 53 and the second connecting piece 52 are located between the first receiving member 31 and the battery core 2; in the direction from the first receiving member 31 to the first tab 21, the third connecting piece 53 is located between the first receiving member 31 and the battery core 2.
  • the first connecting piece 51, the second connecting piece 52, the third connecting piece 53, and the fourth connecting piece 54 are connected in sequence.
  • the first middle piece has a multiple bending structure, and its first connecting piece 51 is connected to the fourth connecting piece 54 through the second connecting piece 52 and the third connecting piece 53 in sequence, and the surface of the first connecting piece 51 is connected to the fourth connecting piece 54 .
  • the surfaces of the two connecting pieces 52 are not parallel, for example, perpendicular.
  • the surfaces of the second connecting piece 52 and the third connecting piece 53 are not parallel, and may be perpendicular or non-perpendicular.
  • the surfaces of the fourth connecting piece 54 and the surfaces of the second connecting piece 52 are not parallel. The surfaces can be parallel.
  • the first middle piece can be prevented from shaking in the left and right and front and rear directions. , the stability of the connection between the first receiving member 31 and the first tab 21 can be further improved.
  • the first connecting piece 51 includes a first connecting portion 511 connected with the first receiving member 31 , and a first connecting portion 511 connected to the first side plate 11 along the extending direction (such as from The second connecting portion 512 extends from the first receiving member 31 to the direction of the first tab 21 , and the second connecting portion 512 is connected to the fourth connecting piece 54 .
  • the first connecting part 511 and the second connecting part 512 are located on the same side of the first receiving member 31 and on the same side of the first tab 21 .
  • the first connecting part 511 may be located on the first receiving member 31 away from the sixth
  • the second connecting portion 512 can be specifically located on the side of the first tab 21 away from the sixth side plate 16
  • the second connecting portion 512 faces the first pole.
  • the angle formed between one side of the lug 21 and the side where the fourth connecting piece 54 and the second pole lug 22 are connected may range from 80° to 140°, such as 80°, 90°, 100°, 120°, and 130°. , 140°, that is, they are not parallel, such as perpendicular.
  • first connecting part 511 and the second connecting part 512 can be integrally formed to form the first connecting piece 51 , and the surfaces of the first connecting part 511 and the second connecting part 512 can be substantially flush, that is, the first connecting piece 51 can be It is a straight structure without a large degree of bending, but it is not limited to this.
  • the surface of the first connecting piece 51 and the surface of the fourth connecting piece 54 are not parallel, for example, perpendicular.
  • first connecting piece 51 and the first receiving member 31 may be welded, and a welding mark is formed on the side of the first connecting piece 51 away from the first receiving member 31 .
  • first connecting piece 51 includes the above-mentioned first connecting part 511 and the second connecting part 512
  • first connecting part 511 and the first receiving part 31 may be welded, and the first connecting part 511 is away from the first receiving part.
  • a weld mark is formed on one side of 31. Specifically, there is an overlapping area between the projection of the first receiving member 31 in the thickness direction of the battery core 2 and the projection of the first connecting piece 51 in the thickness direction of the battery core 2, and the welding area between the two is located in the overlapping area.
  • a sixth insulating layer 86 is also provided on the side of the first connecting piece 51 (or the first connecting portion 511 of the first connecting piece 51 ) away from the first receiving member 31 .
  • the above battery may further include a third insulating layer 83 located between the first middle member and the first side plate 11 .
  • the third insulating layer 83 may include a first portion located on a side of the fourth connecting piece 54 facing away from the first tab 21 .
  • the battery core 2 includes a plurality of stacked electrode sheets.
  • the battery core 2 has a first surface and a second surface that are oppositely arranged.
  • the third insulating layer 83 also includes a first portion close to the battery core 2 from the first portion.
  • a second part is formed from one end of the second surface extending in a direction close to the battery core 2 and a third part is formed in a direction extending from an end of the first part close to the second surface of the battery core 2 in a direction close to the battery core 2 .
  • the second part, the first part and the third part of the third insulating layer 83 are connected in sequence and surrounded by a first groove.
  • the bottom wall of the first groove is the third insulating layer 83
  • the first part and the side walls are respectively the second part and the third part of the third insulating layer 83, the first tab 21, and the part where the first middle piece is connected to the first tab 21 (such as the fourth connecting piece 54 , the second connecting portion 512) of the first connecting piece 51 on the side of the first tab 21 is located in the first groove and is covered by the third insulating layer 83, thereby preventing the first tab 21 or the first connecting piece 51 from contacting the shell. It also protects the first tab 21 and the first middle piece, preventing the first tab 21 and the first middle piece from colliding with the casing when the battery is dropped, thereby further improving the battery life. performance such as stability and security.
  • the first tab 21 has an opposite first side and a second side.
  • the first side of the first tab 21 and the second side of the first tab 21 are respectively located between the first tab 21 and the fourth connection.
  • the opposite sides of the side where the sheets 54 are connected that is, the side of the first tab 21 facing away from the battery core 2).
  • the third insulating layer 83 includes The first part of the side of the connecting piece 54 facing away from the first pole 21 , the second part located on the first side of the first pole 21 , and the third part located on the second side of the first pole 21 ; when the first middle piece
  • the first connecting piece 51 includes a first connecting part 511 and a second connecting part 512 (as shown in FIGS.
  • the layer 83 includes a first portion located on a side of the fourth connecting piece 54 facing away from the first tab 21 , a second portion located on a side of the second connecting portion 512 facing away from the first tab 21 , and a second portion located on a side of the first tab 21 facing away from the second connection.
  • the third part of one side (the second side) of the part 512 is located on a side of the fourth connecting piece 54 facing away from the first tab 21 , a second portion located on a side of the second connecting portion 512 facing away from the first tab 21 , and a second portion located on a side of the first tab 21 facing away from the second connection.
  • the projection of the first tab 21 in the thickness direction of the battery core 2 (that is, the projection is perpendicular to the thickness direction of the battery core 2 ) is located on the third insulating layer 83
  • the projection of the second part in the thickness direction of the battery core 2 is within the projection of the first tab 21 in the thickness direction of the battery core 2 and is located at the third part of the third insulating layer 83 .
  • the projection of the first tab 21 in the length direction of the battery core 2 (that is, the projection is perpendicular to the length direction of the battery core 2) is located in the first part of the third insulating layer 83 in the electric core 2.
  • the third insulating layer 83 completely covers the first tab 21 and the portion where the first intermediate piece is connected to the first tab 21 .
  • the direction from the second part to the first tab 21, the direction from the third part to the first tab 21, the direction from the second part to the third part, and the thickness direction of the battery core 2 can be parallel, and the direction from the first part to the first The direction of the tabs 21 is parallel to the length direction of the battery core 2 .
  • the second part of the third insulating layer 83 extends to the first side of the battery core 2 and is in contact with the electrode sheet located on the first side of the battery core 2 (near the side of the housing 1 The electrode sheet) is bonded, and the third part of the third insulating layer 83 extends to the second surface of the battery core 2 and is bonded to the electrode sheet (the electrode sheet close to the housing 1) located on the second surface of the battery core 2, As a result, the third insulating layer 83 wraps around the side of the battery core 2 , which can further improve the stability of the battery core 2 .
  • a second insulating layer 82 can also be provided between the first receiving member 31 and the battery core 2 to prevent the first receiving member 31 from having opposite polarity electrodes in the battery core 2. Chip contact short circuit. Specifically, when the first receiving member 31 has the second connecting piece 52 , the second insulating layer 82 is located between the second connecting piece 52 of the first intermediate member and the battery core 2 .
  • the second insulating layer 82 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 .
  • the second insulating layer 82 Extends to the second surface of the battery core 2 and is bonded to the electrode sheet located on the second surface of the battery core 2. In this way, the second insulating layer 82 wraps around the side of the battery core 2, and can also fix the battery core 2 and improve the battery core. 2 stability.
  • the battery core 2 includes a plurality of stacked electrode sheets, the electrode sheets include a first electrode sheet, the first electrode sheet includes a first current collector, and the first tab 21 is disposed on the first current collector; along In the direction from the first receiving member 31 to the battery core 2, the distance between the first receiving member 31 and the first current collector is less than 1 mm. That is, the distance between the first receiving member 31 and the first current collector is from the first receiving member 31 to the battery core 2.
  • the distance in the direction of the core 2 is less than 1 mm, thereby further shortening the space occupied by the first receiving member 31 and the first tab 21, improving the space utilization of the cavity, expanding the occupied area of the electrode sheet, and enhancing the energy of the battery core. density.
  • the battery core 2 is also provided with a second tab 22, and the polarity of the second tab 22 is opposite to that of the first tab 21; the battery also includes a second receiving member 32, and the second receiving member 32 is electrically connected to the second tab 22.
  • the second receiving member 32 is disposed between the first side plate 11 and the battery core 2 , and the projection of the second receiving member 32 on the first side plate 11 is different from the projection of the second tab 22 on the first side plate 11 . overlap (that is, the projection of the second receiving member 32 parallel to the extension direction of the first side plate 11 does not overlap with the projection of the second tab 22 parallel to the extension direction of the first side plate 11 ).
  • the second tab 22 and the second receiving member 32 are not distributed along the direction from the battery core 2 to the first side plate 11.
  • the first The distance from the side plate 11 to the battery core 2 is a 1
  • from the side of the second tab 22 connecting with the battery core 2 to the side of the second tab 22 away from the battery core 2 (that is, the side facing the first side plate 11 side) is b 2
  • the length of the second receiving member 32 in the direction from the first side plate 11 to the battery core 2 is c 2 , a 1 ⁇ b 2 + c 2 , thereby further saving the cavity space and improving the energy density of the battery. performance.
  • b 2 and b 1 may be equal or unequal, and c 2 and c 1 may be equal or unequal.
  • the projections of the first pole tab 21 , the second pole tab 22 , the first receiving member 31 , and the second receiving member 32 on the first side plate do not overlap with each other.
  • the projection of the second receiving member 32 on the second side plate 12 at least partially overlaps with the projection of the second tab 22 on the second side plate 12 (that is, the second receiving member 32 is perpendicular to
  • the projection of the extension direction of the first side plate 11 at least partially overlaps with the projection of the second pole tab 22 perpendicular to the extension direction of the first side plate 11 ), that is to say, the second receiving member 32 and the second pole tab 22 extend along the first side panel 11 .
  • the extension direction of one side plate can be arranged in the width direction of the battery core, thereby facilitating the connection between the second receiving member 32 and the second tab 22, further saving the cavity space, and improving the energy density of the battery. etc. performance.
  • the projection of the first pole 21 on the second side plate 12 at least partially overlaps with the projection of the second pole 22 on the second side plate 12 (that is, the extension of the first pole 21 perpendicular to the first side plate 11
  • the projection of the second tab 22 perpendicular to the extension direction of the first side plate 11 at least partially overlaps).
  • the projection of the first receiving member 31 on the second side panel 12 and the projection of the second receiving member 32 on the second side panel 12 at least partially overlap.
  • the projection of the first tab 21 perpendicular to the width direction of the battery core 2 at least partially overlaps with the projection of the second tab 22 perpendicular to the width direction of the battery core 2
  • the second contact The projection of the member 32 perpendicular to the width direction of the battery core 2 at least partially overlaps with the projection of the second tab 22 perpendicular to the width direction of the battery core 2 .
  • first pole tab 21 and the second pole tab 22 can be located between the first receiving member 31 and the second receiving member 32, thereby making full use of the space between the first receiving member 31 and the second receiving member 32 to further expand the
  • the size of the electrode sheet of the battery core 2 in the length direction is to increase the energy density of the battery core.
  • first pole tab 21 and the second pole tab 22 are located between the first receiving member 31 and the second receiving member 32 , that is, the first receiving member 31
  • the member 31, the first pole tab 21, the second pole tab 22, and the second receiving member 32 can be arranged in sequence.
  • first receiving member 31, the first pole tab 21, the second pole tab 22, and the second receiving member 32 They may be arranged sequentially in the width direction of the battery core 2 , and the first receiving member 31 , the first pole tab 21 , the second pole tab 22 , and the second receiving member 32 may be arranged substantially coaxially.
  • first receiving member 31 and the second receiving member 32 may be located between the first pole tab 21 and the second pole tab 22 .
  • the first receiving member 31, the first pole tab 21, the second pole tab 22, and the second receiving member 32 generally do not protrude from the outer edge of the end surface of the battery core 2 (the end surface of the battery core 2 facing the first side plate 11).
  • the outer edge of the battery core 2 does not protrude in either the thickness direction or the width direction, that is, the projection of the battery core 2 on the first side plate 11 covers the projection of the first receiving member 31 on the first side plate 11 , the projection of the battery core 2 on the first side plate 11 covers the projection of the first tab 21 on the first side plate 11 , and the projection of the battery core 2 on the first side plate 11 covers the projection of the second tab 22 on the first side plate 11 .
  • the projection of the battery core 2 on the first side plate 11 covers the projection of the second receiving member 32 on the first side plate 11 .
  • the distance from the side of the second tab 22 away from the battery core 2 to the side of the second tab 22 connecting with the battery core 2 is no greater than the distance between the second receiving member 32 and the distance along the first side plate 11 to The length in the direction of the second tab 22 is conducive to further improving the energy density and other performance of the battery.
  • the second receiving member 32 may be in the shape of a block (or called a second adapter block), and its thickness direction may be parallel to the direction from the first side plate 11 to the second tab 22 , that is, the second receiving member 32 is in the shape of a block. along the first side plate 11 to the second tab 22 The length in the direction is the thickness of the second receiving member 32 .
  • the direction from the first side plate 11 to the first tab 21 , the direction from the first side plate 11 to the second tab 22 , and the direction from the first side plate 11 to the battery core 2 are parallel.
  • the length c 2 of the second receiving member 32 in the direction from the first side plate 11 to the second tab 22 is 1 mm to 4 mm, such as 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm. , 4mm, etc.
  • c 2 may be greater than, equal to, or less than c 1 , preferably c 2 ⁇ c 1 , and further preferably c 2 >c 1 .
  • the first tab 21 is insulatedly connected to the housing 1
  • the second insulating sheet 7 is provided between the first receiving member 31 and the first side plate 11, and the second receiving member 32 can be connected with the first side plate 11.
  • the plate 11 is welded.
  • the difference between the two can be basically equal to the thickness of the second insulating sheet 7; when the first tab 21 is electrically connected to the housing 1, and the second When the pole tab 22 is insulatedly connected to the housing 1, the second insulating sheet 7 does not need to be provided between the first receiving member 31 and the first side plate 11, and the two are in direct contact, and between the second receiving member 32 and the first side plate A second insulating sheet 7 can be provided between 11 (the connection structure of the second receiving member 32 and the housing 1 can be similar to the connection structure of the first receiving member 31 and the housing 1 through the pole 42, which will not be described again).
  • the cavity space can be further saved and the energy density and other performance of the battery can be improved.
  • the second tab 22 can be electrically connected to the housing 1, that is, the housing 1, the second receiving member 32, and the second tab 22 are electrically connected.
  • the second receiving member 32 can be welded to the second tab 22 and the housing 1 respectively. , specifically it can be welded to the first side plate 11 of the housing 1 .
  • the above-mentioned battery may also include a second middle piece located between the battery core 2 and the first side plate 11.
  • the second middle piece is connected to the second tab 22 and the second receiving member 32 respectively (that is, the second receiving member 32 passes through the second receiving member 32).
  • the second middle piece is connected to the second tab 22), specifically, the second receiving piece 32, the second middle piece, and the second tab 22 can be welded in sequence.
  • the second middle piece may include a fifth connecting piece 55 connected to the second receiving member 32 and an eighth connecting piece 58 connected to a side of the second tab 22 away from the battery core 2 .
  • the second middle piece may have a bent structure, the fifth connecting piece 55 is connected to the second receiving member 32 , and the eighth connecting piece 58 is connected to the second tab 22 .
  • a second included angle is formed between the side of the second receiving member 32 that connects to the fifth connecting piece 55 and the side that connects the eighth connecting piece 58 to the second tab 22 , and the range of the second included angle is 80 -140°, such as 80°, 90°, 100°, 120°, 130°, 140°, etc., that is, the two are not parallel, such as perpendicular. Therefore, the connection between the second receiving part 32 and the second intermediate part can be further improved. The stability of the connection of the second tab 22 thereby improves the stability, safety, service life and other qualities of the battery.
  • a fourth included angle is formed between the side of the second receiving member 32 that is in contact with the fifth connecting piece 55 and the side of the second receiving member 32 facing the first side plate 11 , and the range of the fourth included angle is 80-140. °, such as 80°, 90°, 100°, 120°, 130°, 140°, etc., that is, the two are not parallel, for example, they can be perpendicular.
  • the battery core 2 includes a plurality of stacked electrode sheets, and the fifth connecting sheet 55 is connected to the second receiving member 32 .
  • the surface is parallel to the surface of the electrode sheet.
  • the second middleware further includes a second connecting component connected to the fifth connecting piece 55 and the eighth connecting piece 58 respectively.
  • the second connecting component includes a sixth connecting piece 56 and a sixth connecting piece 56 .
  • the seventh connecting piece 57 and the sixth connecting piece 56 are located between the second receiving member 32 and the battery core 2; in the direction from the second receiving member 32 to the second tab 22, the seventh connecting piece 57 is located between the second receiving member 32 and the battery core 2.
  • the fifth connecting piece 55, the sixth connecting piece 56, the seventh connecting piece 57, and the eighth connecting piece 58 are connected in sequence.
  • the second middle piece has a multiple bending structure, and its fifth connecting piece 55 is connected to the eighth connecting piece 58 through the sixth connecting piece 56 and the seventh connecting piece 57 in sequence, and the surface of the fifth connecting piece 55 is connected to the eighth connecting piece 58 .
  • the surfaces of the six connecting pieces 56 are not parallel, for example, perpendicular.
  • the surfaces of the sixth connecting piece 56 and the seventh connecting piece 57 are not parallel, and may be perpendicular or non-perpendicular.
  • the surfaces of the eighth connecting piece 58 and the surfaces of the sixth connecting piece 56 are not parallel. The surfaces may be parallel, thereby further improving the stability of the connection between the second receiving member 32 and the second tab 22 .
  • the fifth connecting piece 55 includes a third connecting portion 551 connected with the second receiving member 32 , and an extension direction along the first side plate 11 (such as from The fourth connecting portion 552 extends from the second receiving member 32 to the direction of the second pole lug 22 .
  • the fourth connecting portion 552 is connected to the eighth connecting piece 58 .
  • the third connecting portion 551 and the fourth connecting portion 552 are located on the same side of the second receiving member 32 and on the same side of the second pole lug 22 .
  • the third connecting portion 551 can be located on the second receiving member 32 away from the sixth connecting member 32 .
  • the fourth connecting portion 552 can be specifically located on the side of the second tab 22 facing away from the sixth side plate 16.
  • the fourth connecting portion 552 faces the side of the second tab 22 and the eighth connecting piece 58.
  • the connecting surfaces of the second pole tabs 22 are not parallel, for example, vertical.
  • the third connecting part 551 and the fourth connecting part 552 can be integrally formed to form the fifth connecting piece 55.
  • the surfaces of the third connecting part 551 and the fourth connecting part 552 can be flush, that is, the fifth connecting piece 55 can be A straight structure without a large degree of bending, but is not limited to this.
  • the surface of the fifth connecting piece 55 and the surface of the eighth connecting piece 58 are not parallel, for example, perpendicular. That is, the surface of the fifth connecting piece 55 and the second receiving member 32 is in contact with the eighth connecting piece 58 and the second tab 22 .
  • the connected sides are not parallel, such as vertical.
  • the fifth connecting piece 55 and the second receiving member 32 may be welded, and a welding mark is formed on the side of the fifth connecting piece 55 away from the second receiving member 32 .
  • the fifth connecting piece 55 includes the third connecting part 551 and the fourth connecting part 552
  • the third connecting part 551 and the second receiving part 32 may be welded, and the third connecting part 551 is away from the second receiving part 32
  • a solder mark is formed on one side of the
  • a sixth insulating layer 86 is provided on the side of the fifth connecting piece 55 (or the third connecting portion 551 of the fifth connecting piece 55 ) away from the second receiving member 32 .
  • the sixth insulating layer 86 It may extend from the first connecting piece 51 to the fifth connecting piece 55. Specifically, it may extend from an end of the first connecting piece 51 facing away from the fifth connecting piece 55 to an end of the fifth connecting piece 55 facing away from the first connecting piece 51, covering the first connecting piece 51.
  • a connecting piece 51 and a fifth connecting piece 55 may be provided on the side of the fifth connecting piece 55 (or the third connecting portion 551 of the fifth connecting piece 55 ) away from the second receiving member 32 .
  • the sixth insulating layer 86 It may extend from the first connecting piece 51 to the fifth connecting piece 55. Specifically, it may extend from an end of the first connecting piece 51 facing away from the fifth connecting piece 55 to an end of the fifth connecting piece 55 facing away from the first connecting piece 51, covering the first connecting piece 51.
  • a fourth insulating layer 84 may also be included, and the fourth insulating layer 84 is located between the second middle piece and the first side plate 11 .
  • the fourth insulating layer 84 may include a fourth portion located on a side of the eighth connecting piece 58 facing away from the second tab 22 .
  • the fourth insulating layer 84 further includes an end of the fourth portion close to the first surface of the battery core 2 .
  • a fifth part extends in a direction close to the battery core 2 and a sixth part extends in a direction close to the battery core 2 from an end of the fourth part close to the second surface of the battery core 2 .
  • the fifth part, the fourth part and the sixth part of the fourth insulating layer 84 are connected in sequence and surrounded by a second groove.
  • the bottom wall of the second groove is the fourth insulating layer.
  • the fourth part and side walls of 84 are respectively the fifth part and the sixth part of the fourth insulating layer 84, the second tab 22, and the part where the second middle piece is connected to the second tab 22 (such as the eighth connection).
  • the fourth connecting portion 552) of the piece 58 and the fifth connecting piece 55 located on the side of the second tab 22 is located in the second groove and covered by the fourth insulating layer 84, thereby further improving the stability and safety of the battery. etc. performance.
  • the second tab 22 has an opposite first side and a second side.
  • the first side of the second tab 22 and the second side of the second tab 22 are respectively located between the second tab 22 and the eighth connection. Opposite sides of the side where the pieces 58 meet.
  • the fourth insulating layer 84 includes a fourth portion located on the side of the eighth connecting piece 58 facing away from the second tab 22, a fifth portion located on the first side of the second tab 22, and a sixth portion located on the second side of the second tab 22.
  • the fourth connecting portion 552 extends to the third connecting portion of the second tab 22 .
  • the fourth insulating layer 84 includes a fourth portion located on a side of the eighth connecting piece 58 facing away from the second tab 22 , a fifth portion located on a side of the fourth connecting portion 552 facing away from the second tab 22 , and a fifth portion located on a side of the fourth connecting portion 552 facing away from the second tab 22 .
  • the sixth part of the side (second side) of the tab 22 that is away from the fourth connecting portion 552 .
  • the projection of the second tab 22 in the thickness direction of the battery core 2 is located at the projection of the fifth part of the fourth insulating layer 84 in the thickness direction of the battery core 2
  • the projection of the second tab 22 in the thickness direction of the battery core 2 is located within the projection of the sixth part of the fourth insulating layer 84 in the thickness direction of the battery core 2
  • the second tab 22 is within the length of the battery core 2
  • the projection in the direction is located within the projection of the fourth part of the fourth insulating layer 84 in the length direction of the battery core 2 , that is, the fourth insulating layer 84 completely covers the second tab 22 and the second middle member and the second tab 22 connected parts.
  • the direction from the fifth part to the second tab 22, the direction from the sixth part to the second tab 22, the direction from the fifth part to the sixth part, and the thickness direction of the battery core 2 can be parallel, and the direction from the fourth part to the second tab 22 can be parallel.
  • the direction of the diode tabs 22 is parallel to the length direction of the battery core 2 .
  • the fifth part of the fourth insulating layer 84 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 .
  • the sixth part of the layer 84 extends to the second surface of the battery core 2 and is bonded to the electrode sheet located on the second surface of the battery core 2. Therefore, the fourth insulating layer 84 wraps around the side of the battery core 2, which can further improve the performance of the battery core 2. The stability of cell 2.
  • a fifth insulating layer 85 may be disposed between the second receiving member 32 and the battery core 2 to prevent the second receiving member 32 from contacting the opposite polarity electrodes in the battery core 2 . Chip contact short circuit. Specifically, when the second receiving member 32 has the sixth connecting piece 56 , the fifth insulating layer 85 is located between the sixth connecting piece 56 of the second intermediate member and the battery core 2 .
  • the fifth insulating layer 85 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 .
  • the fifth insulating layer 85 Extends to the second surface of the battery core 2 and is bonded to the electrode sheet located on the second surface of the battery core 2. In this way, the fifth insulating layer 85 wraps around the side of the battery core 2 and can also fix the battery core 2. Improve the stability of battery core 2.
  • the battery core 2 includes a plurality of stacked electrode sheets, the electrode sheets include a second electrode sheet, the second electrode sheet includes a second current collector, and the second tab 22 is disposed on the second current collector; along In the direction from the second receiving member 32 to the battery core 2, the distance between the second receiving member 32 and the second current collector is less than 1 mm, that is, the distance between the second receiving member 32 and the second current collector is along the direction from the second receiving member 32 to the battery core The distance in the direction of core 2 is less than 1 mm.
  • the battery core 2 has a side surface located between the first surface of the battery core 2 and the second surface of the battery core 2, and at least a partial area of at least one side of the battery core 2 is provided with protection.
  • the side of the battery core 2 is the side that exposes the outer edge of the electrode sheet in the battery core 2, and is formed by the end surfaces of a plurality of stacked electrode sheets perpendicular to the thickness direction thereof, that is, the side of the battery core 2 is parallel to the battery core. 2 thickness direction (also the thickness direction of the electrode sheet).
  • the side surfaces of the battery core 2 include a first side, a second side, a third side, and a fourth side that are connected in sequence.
  • the first side is the end surface of the battery core 2 facing the first side plate 11. (That is, the side of the battery core 2 provided with the first tab 21 and the second tab 22), the second side and the fourth side are located on opposite sides of the first side (or the third side), and the first side and the third side are The sides are located on opposite sides of the second side (or fourth side).
  • first side and the third side can be parallel to each other
  • second side and the fourth side can be parallel to each other
  • first side (or third side) and the second side (or fourth side) can be perpendicular to each other
  • first side (or third side) and the second side (or fourth side) can be perpendicular to each other
  • first side The direction to the third side may be the length direction of the battery core 2
  • the second side to the fourth side may be the width direction of the battery core 2
  • the direction from the first side to the third side may also be the width of the battery core 2 direction
  • the second side to the fourth side are the length direction of the battery core 2 .
  • At least one of the second side, the third side and the fourth side is provided with a protective glue layer 9, that is, one or more (such as all) of them is provided with a protective glue layer 9, but is not limited to this.
  • a protective adhesive layer 9 can also be provided on the first side.
  • the number of the protective glue layers 9 on any side of the battery core 2 may be one or more.
  • the protective glue layers 9 on the side along the The length in the longitudinal direction may not be greater than the length of the side, for example, substantially equal;
  • the plurality of protective glue layers 9 are arranged at intervals on the side of the battery core 2, as follows: There is a gap between any two adjacent protective adhesive layers 9, and the gap facilitates the electrolyte to infiltrate into the pole pieces in the battery core, further optimizing the battery performance.
  • the length of the protective glue layer 9 in the length direction of the second side may not be greater than the length of the second side, for example, the length of the second side.
  • the lengths of the side surfaces are substantially equal; when there are multiple protective adhesive layers 9 on the second side, the multiple protective adhesive layers 9 can be distributed at intervals on the second side.
  • the protective adhesive layer 9 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 and/or extends to the battery core. 2 and is bonded to the electrode sheet located on the second side of the battery core 2. This prevents the exposed electrode sheet from the side of the battery core 2 from contacting the casing 1.
  • the battery core 2 can be fixed and the battery performance is improved. performance such as security and stability.
  • the protective adhesive layer 9 may be provided with one or more fifth through holes 90 , preferably multiple fifth through holes 90 , and the plurality of fifth through holes 90 may be evenly or unevenly distributed.
  • this part of the protective glue layer 9 is stacked on the side of the battery core 2 (such as the second side)
  • through the fifth through hole 90 can improve the wettability of the electrolyte to the battery core 2, allowing the electrolyte to better infiltrate into the electrode sheet, further optimizing the battery performance.
  • the protective adhesive layer 9 on this side may be provided with one or more fifth through holes 90 .
  • the above-mentioned protective adhesive layer 9 can specifically be adhesive paper, which generally has insulation and viscosity. It can be conventional adhesive paper in this field, and is not particularly limited.
  • the first receiving member 31, the first tab 21, the second tab 22, and the second receiving member 32 are located on the end surface of the battery core 2 facing the first side plate 11.
  • the first surface of the battery core 2 and the second surface of the battery core 2 The surfaces are respectively located on opposite sides of the end surface of the battery core 2 facing the first side plate 11.
  • the direction from the first surface of the battery core 2 to the second surface of the battery core 2 is the thickness direction of the battery core 2 (also the thickness of the electrode sheet). direction), the first surface of the battery core 2 and the second surface of the battery core 2 can be parallel to the surface of the electrode sheet (perpendicular to the thickness direction of the electrode sheet), and can be perpendicular to the end surface of the battery core 2 facing the first side plate 11 .
  • the electrode sheets located on the first side of the battery core 2 and the electrode sheets located on the second side of the battery core 2 are respectively the outermost electrode sheets of the battery core 2 , that is, the remaining electrode sheets are stacked on the first side of the battery core 2 between the electrode sheet and the electrode sheet located on the second side of the battery core 2 .
  • the polarity of the electrode sheet located on the first side of the battery core 2 and the polarity of the electrode sheet located on the second side of the battery core 2 may be the same or different. They may be positive electrode sheets or negative electrode sheets, and may be the first electrode sheet or the second electrode sheet. Generally, it is preferred that the electrode sheet located on the first side of the battery core 2 and the electrode sheet located on the second side of the battery core 2 are negative electrode sheets.
  • the battery core 2 includes a plurality of stacked electrode sheets.
  • the electrode sheets include a first electrode sheet and a second electrode sheet, which are separated by a separator.
  • the first electrode The polarity of the electrode sheet is opposite to that of the second electrode sheet.
  • the first electrode sheet can be a positive electrode sheet or a negative electrode sheet.
  • the second electrode sheet can be a negative electrode sheet or a positive electrode sheet.
  • the end surface of the side of the battery core 2 provided with the tabs (the first tab and the second tab) (that is, the end surface of the side of the battery core 2 facing the first side plate 11 ) is parallel to the thickness direction of the battery core 2 .
  • the electrode sheet in the battery core 2 includes a current collector, and the tabs (the first tab 21 and the second tab 22) are arranged on the current collector (the first current collector and the second current collector). Specifically, it can be set At the end of the current collector, the end surface of the battery core 2 facing the first side plate 11 is formed by the end surface of a plurality of stacked electrode sheets with tabs (the end surface of the electrode sheet parallel to its thickness direction). .
  • the battery core 2 may include a laminated battery core 2 and/or a wound battery core 2.
  • the wound battery core 2 is formed by stacking a plurality of electrode sheets and then rolling them. Specifically, it is composed of a first electrode sheet, The separator and the second electrode sheet are stacked in sequence and then rolled; the laminated battery core 2 is specifically formed by the first electrode sheet, the separator, and the second electrode sheet being stacked in sequence.
  • the battery may specifically include a lithium-ion battery, but is not limited thereto.
  • the housing 1 may include a first side plate 11 , a second side plate 12 , a third side plate 13 , a fourth side plate 14 , a fifth side plate 15 , a sixth side plate.
  • Board 16 the first side panel 11, the second side panel 12, the third side panel 13, and the fourth side panel 14 are connected in sequence, and are located at the sixth side panel 16 (or bottom panel) and the fifth side panel 15 respectively. (or cover), a closed cavity is formed, and the battery core 2 is placed in the cavity.
  • the first side panel 11 and the third side panel 13 are located on opposite sides of the second side panel 12 (or the fourth side panel 14 ).
  • the second side panel 12 and the fourth side panel 14 are located on the first side panel 11 (or the fourth side panel 14 ).
  • the fifth side panel 15 and the sixth side panel 16 are respectively located on the first side panel 11 (or the second side panel 12, or the third side panel 13, or the fourth side panel 14).
  • the direction of the fifth side plate 15 to the sixth side plate 16 is the thickness direction of the casing 1
  • the direction of the first side plate 11 to the third side plate 13 can be the length direction of the casing 1
  • the direction of the first side plate 11 to the third side plate 13 can be the length direction of the casing 1 .
  • the direction of the second side plate 12 to the fourth side plate 14 is the width direction of the casing 1, or the direction of the first side plate 11 to the third side plate 13 is the width direction of the casing 1, and the direction of the second side plate 12 to the third side plate 12 is the width direction of the casing 1.
  • the four side plates 14 are the length direction of the housing 1 .
  • One of the first side of the battery core 2 and the second side of the battery core 2 is the side of the battery core 2 facing the fifth side plate 15
  • the other is the side of the battery core 2 facing the sixth side plate 16 .
  • the insulating layer 86 is located between the first connecting piece 51 and the fifth side plate 15 and/or between the fifth connecting piece 55 and the fifth side plate 15 .
  • arc transition portions 17 can be passed between the first side plate 11 and the second side plate 12 , between the second side plate 12 and the third side plate 13 , and between the third side plate 13 and the fourth side plate 14 . Connection, that is, the connecting part of two adjacent side panels is transitioned through an arc.
  • the arc transition portion 17 has a cross-section perpendicular to the first direction.
  • the side away from the cavity and the side facing the cavity are arcs respectively, forming a groove with an opening facing the cavity.
  • the first direction is parallel to The direction from the fifth side plate 15 to the sixth side plate 16 (that is, the thickness direction of the housing 1).
  • the case 1 can also be provided with a thinned portion 151.
  • the mechanical strength of the thinned portion 151 is smaller than the mechanical strength of other parts of the case 1 except the thinned portion 151. Therefore, when the internal pressure of the battery is too high, priority can be given to The pressure is released through the thinned portion 151 to avoid battery explosion and other phenomena.
  • the thinned portion 151 may be provided on the fifth side plate 15 (the surface of the fifth side plate 15 may be parallel to the surface of the electrode sheet).
  • the thickness of the thinned portion 151 is smaller than the thickness of other portions of the housing 1 except the thinned portion 151 .
  • the housing 1 is also provided with a liquid injection hole 100 and a sealing sheet for sealing the liquid injection hole 100.
  • the liquid injection hole 100 is used for injecting electrolyte into the cavity. After the electrolyte is injected, the sealing sheet is used to seal the injection hole. The liquid hole 100 is sealed.
  • the sealing sheet may include a metal sheet, which may be welded to the housing 1 around the liquid injection hole 100 to seal the liquid injection hole 100 .
  • the liquid injection hole 100 can be provided on the first side plate 11 , specifically, it can be located at the joint between the first side plate 11 and the second middle piece and at the joint between the first side plate 11 and the first receiving member 31 (or external piece 41), the sealing piece can be welded to the side of the first side plate 11 facing away from the cavity. Specifically, it can be welded to the part of the first side plate 11 located around the liquid injection hole 100 to oppose the liquid injection hole 100. Make a seal.
  • the above-mentioned welding may specifically be laser welding.
  • the first connecting piece 51 of the first intermediate piece may be connected to the first receiving member 31 through laser welding, and a sealing piece may be used to seal the liquid injection hole 100 through laser welding, etc. .
  • the first pole tab 21 may be a positive pole tab or a negative pole tab, that is, one of the first pole tab 21 and the second pole tab 22 is a positive pole tab, and the other is a negative pole tab.
  • the first pole tab 21 is a positive pole tab.
  • the housing 1 may specifically be a metal packaging shell, that is, it may be made of metal, that is, the first side plate 11 , the second side plate 12 , the third side plate 13 , the fourth side plate 14 , the fifth side plate 15 ,
  • the six side plates 16 may be made of metal, such as aluminum, aluminum alloy, nickel, iron or nickel-iron alloy.
  • the housing 1 when the housing 1 is electrically connected to the positive terminal, the housing 1 can be made of the same polarity material as the positive terminal, such as aluminum or aluminum alloy respectively.
  • the specific materials of the two can be the same or different (the two materials can be the same or different).
  • the materials are different, for example, the material of the positive electrode ear is aluminum, and the material of the housing 1 is aluminum alloy); when the housing 1 and the negative electrode ear are electrically connected, the housing 1 and the negative electrode ear are made of the same polarity, such as nickel respectively. , iron or nickel-iron alloy, the specific material types of the two can be the same or different.
  • the material of the first receiving member 31, the material of the first intermediate member, and the material of the first tab 21 may be materials of the same polarity.
  • the first tab 21 is a positive tab
  • the materials of the first receiving member 31 The material of the first middleware, the first pole
  • the material of the ears 21 can be aluminum or aluminum alloy respectively, and the specific material types can be the same or different.
  • the material of the second receiving member 32, the material of the second middle member, and the material of the second tab 22 may be materials of the same polarity.
  • the second tab 22 is a negative tab
  • the material of the second receiving member 32, the second The material of the middle piece and the material of the second pole lug 22 can be nickel, iron or nickel-iron alloy respectively, and their specific material types can be the same or different.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
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  • Manufacturing & Machinery (AREA)
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  • Connection Of Batteries Or Terminals (AREA)

Abstract

Provided in the present invention is a battery, comprising: a casing, which forms a cavity in an enclosed manner, and comprises a first side plate; a battery cell located in the cavity and provided with a first tab; and an externally connecting piece electrically connected to the first tab, wherein the externally connecting piece is located on the side of the first side plate away from the cavity, and comprises a terminal formed by protruding outwards; the first side plate comprises a second through hole arranged corresponding to the terminal; the terminal passes through the second through hole to be connected to the first tab; and the diameter of the terminal tends to increase or decrease in a direction from the first side plate to the battery cell. The present invention can improve the sealability, safety and other performances of the battery.

Description

电池Battery 技术领域Technical field
本发明涉及电化学储能装置领域，具体涉及一种电池。The invention relates to the field of electrochemical energy storage devices, and in particular to a battery.
背景技术Background technique
目前，以电池为代表的电化学装置受到广泛应用，例如，锂离子电池具有容量大、体积小、重量轻和绿色环保等优点，已广泛应用于数码电子产品和电动汽车等行业中。At present, electrochemical devices represented by batteries are widely used. For example, lithium-ion batteries have the advantages of large capacity, small size, light weight and environmental protection, and have been widely used in industries such as digital electronic products and electric vehicles.
随着科技发展，对电池的密封性和安全性等性能的要求也越来越高，因此，亟待提高电池的密封性和安全性等性能。With the development of science and technology, the requirements for the sealing and safety of batteries are getting higher and higher. Therefore, it is urgent to improve the sealing and safety of batteries.
发明内容Contents of the invention
本发明提供一种电池，能够提高电池的密封性和安全性等性能。The invention provides a battery that can improve the sealing performance, safety and other properties of the battery.
本发明提供一种电池，包括：壳体，围设成腔体；所述壳体包括第一侧板；电芯，位于所述腔体内，所述电芯设有第一极耳；外接片，与所述第一极耳电连接，所述外接片位于所述第一侧板背离所述腔体的一侧，所述外接片包括向外凸起形成的极柱，所述第一侧板包括与所述极柱对应设置的第二通孔，所述极柱通过所述第二通孔与所述第一极耳相连；沿从所述第一侧板至所述电芯的方向，所述极柱的直径呈增大或减小趋势。The invention provides a battery, which includes: a casing, which is surrounded by a cavity; the casing includes a first side plate; a battery core located in the cavity, and the battery core is provided with a first tab; and an external connection piece. , electrically connected to the first tab, the external piece is located on the side of the first side plate away from the cavity, the external piece includes an outwardly protruding pole, the first side The plate includes a second through hole corresponding to the pole, and the pole is connected to the first tab through the second through hole; along the direction from the first side plate to the battery core , the diameter of the pole shows an increasing or decreasing trend.
根据本发明的一实施方式，所述电池还包括位于所述第一侧板与所述电芯之间的第一承接件，所述第一承接件与所述第一极耳电连接，所述第一承接件设有与所述极柱对应设置的第一通孔，所述极柱通过所述第一通孔与所述第一承接件相连。According to an embodiment of the present invention, the battery further includes a first receiving member located between the first side plate and the battery core, and the first receiving member is electrically connected to the first tab, so The first receiving member is provided with a first through hole corresponding to the pole, and the pole is connected to the first receiving member through the first through hole.
根据本发明的一实施方式，所述第一承接件的第一通孔包括有相互连接的第一孔段和第二孔段，所述第二孔段位于所述第一孔段靠近所述电芯的一侧；所述极柱靠近所述电芯的一端向外延伸形成有与所述第二孔段对应设置的外延部。According to an embodiment of the present invention, the first through hole of the first receiving member includes a first hole section and a second hole section connected to each other, and the second hole section is located near the first hole section and close to the first hole section. One side of the battery core; one end of the pole close to the battery core extends outward to form an extension portion corresponding to the second hole section.
根据本发明的一实施方式，所述极柱的靠近电芯的一端面与所述第一承接件的靠近电芯的一侧表面齐平。According to an embodiment of the present invention, an end surface of the pole close to the battery core is flush with a side surface of the first receiving member close to the battery core.
根据本发明的一实施方式，所述极柱靠近所述电芯的一端伸出所述第一通孔、并沿所述第一通孔的周向向外延伸形成有与所述第一承接件靠近所述电芯的一侧表面相接的外延部。According to an embodiment of the present invention, one end of the pole close to the battery core extends out of the first through hole, and extends outward along the circumferential direction of the first through hole to form a connection with the first socket. The parts are close to the outer extension of one side surface of the battery core.
根据本发明的一实施方式，所述外接片与所述第一侧板之间还设有第一绝缘片，所述第一承接件与所述第一侧板之间还设有第二绝缘片，所述极柱穿透所述第一绝缘片和所述第二绝缘片；和/或，所述极柱与所述第一侧板之间设有第一绝缘层；和/或，所述第一承接件与所述电芯之间设有第二绝缘层。 According to an embodiment of the present invention, a first insulation piece is further provided between the external piece and the first side plate, and a second insulation piece is further provided between the first receiving member and the first side plate. sheet, the pole penetrates the first insulating sheet and the second insulating sheet; and/or, a first insulating layer is provided between the pole and the first side plate; and/or, A second insulation layer is provided between the first receiving member and the battery core.
根据本发明的一实施方式，所述壳体还包括与所述第一侧板相连的第六侧板；所述第二绝缘片包括第一绝缘部和第二绝缘部，所述第一绝缘部位于所述第一承接件与所述第一侧板之间，所述极柱穿透所述第一绝缘部；所述第二绝缘部位于所述第一承接件与所述第六侧板之间。According to an embodiment of the present invention, the housing further includes a sixth side plate connected to the first side plate; the second insulating sheet includes a first insulating part and a second insulating part, and the first insulating The pole is located between the first receiving part and the first side plate, and the pole penetrates the first insulating part; the second insulating part is located between the first receiving part and the sixth side between the boards.
根据本发明的一实施方式，所述第二绝缘部在所述第六侧板上的投影覆盖所述第一承接件在所述第六侧板上的投影；和/或，所述第一绝缘部在所述第一侧板上的投影覆盖所述第一承接件在所述第一侧板上的投影；和/或，所述第一绝缘部和所述第二绝缘部之间的夹角范围为80°～120°。According to an embodiment of the present invention, the projection of the second insulating part on the sixth side plate covers the projection of the first receiving member on the sixth side plate; and/or the first The projection of the insulating part on the first side plate covers the projection of the first receiving member on the first side plate; and/or, the gap between the first insulating part and the second insulating part The included angle range is 80°~120°.
根据本发明的一实施方式，所述第一绝缘片在所述第一侧板上的投影覆盖所述外接片在第一侧板上的投影。According to an embodiment of the present invention, the projection of the first insulating sheet on the first side panel covers the projection of the external connecting sheet on the first side panel.
根据本发明的一实施方式，所述电芯包括多个层叠设置的电极片，所述电芯具有相对设置的第一侧面和第二侧面，其中，所述第二绝缘层延伸至所述电芯的第一侧面并与位于所述电芯的第一侧面的电极片粘接，和/或，所述第二绝缘层延伸至所述电芯的第二侧面并与位于所述电芯的第二侧面的电极片粘接。According to an embodiment of the present invention, the battery core includes a plurality of stacked electrode sheets, and the battery core has a first side and a second side arranged oppositely, wherein the second insulating layer extends to the electrode sheet. The first side of the core is bonded to the electrode sheet located on the first side of the battery core, and/or the second insulating layer extends to the second side of the battery core and is bonded to the electrode sheet located on the first side of the battery core. The electrode sheet on the second side is bonded.
根据本发明的一实施方式，所述第一承接件在所述第一侧板上的投影与所述第一极耳在所述第一侧板上的投影不重叠。According to an embodiment of the present invention, the projection of the first receiving member on the first side plate does not overlap with the projection of the first tab on the first side plate.
根据本发明的一实施方式，所述壳体包括与所述第一侧板相连接的第二侧板，所述第一承接件在所述第二侧板上的投影与所述第一极耳在所述第二侧板上的投影至少部分重叠。According to an embodiment of the present invention, the housing includes a second side plate connected to the first side plate, and the projection of the first receiving member on the second side plate is in line with the first pole. The projections of the ears on the second side panel at least partially overlap.
根据本发明的一实施方式，所述电芯设有所述第一极耳的一侧的端面与所述电芯的厚度方向平行；和/或，所述第一极耳背离所述电芯的一侧至所述第一极耳与所述电芯相接的一侧的距离不大于所述第一承接件沿所述第一侧板至所述第一极耳的方向的长度；和/或，沿所述第一侧板至所述第一极耳的方向，所述第一承接件的长度为1mm-3mm。According to an embodiment of the present invention, the end surface of the side of the battery core provided with the first tab is parallel to the thickness direction of the battery core; and/or, the first tab is away from the battery core. The distance from one side to the side where the first tab is connected to the battery core is no longer than the length of the first receiving member along the direction from the first side plate to the first tab; and /Or, along the direction from the first side plate to the first tab, the length of the first receiving member is 1mm-3mm.
根据本发明的一实施方式，所述电池还包括位于所述电芯与所述第一侧板之间的第一中间件，所述第一中间件分别与所述第一极耳和所述第一承接件连接。According to an embodiment of the present invention, the battery further includes a first middle piece located between the battery core and the first side plate, and the first middle piece is connected to the first tab and the first side plate respectively. The first receiving piece is connected.
根据本发明的一实施方式，所述第一中间件包括有与所述第一承接件连接的第一连接片、与所述第一极耳的背离所述电芯的一侧相接的第四连接片。According to an embodiment of the present invention, the first intermediate piece includes a first connecting piece connected to the first receiving member, and a third connecting piece connected to a side of the first tab away from the battery core. Four connecting pieces.
根据本发明的一实施方式，所述第一中间件还包括分别与所述第一连接片和第四连接片连接起来的第一连接组件；所述第一连接组件包括第二连接片和第三连接片；所述第二连接片位于所述第一承接件与所述电芯之间；在从所述第一承接件至所述第一极耳的方向上，所述第三连接片位于所述第一极耳和所述第一承接件之间；所述第一连接片、第二连接片、第三连接片、第四连接片依次相连。According to an embodiment of the present invention, the first middle piece further includes a first connection component connected to the first connection piece and the fourth connection piece respectively; the first connection component includes a second connection piece and a third connection piece. Three connecting pieces; the second connecting piece is located between the first receiving member and the battery core; in the direction from the first receiving member to the first tab, the third connecting piece Located between the first pole tab and the first receiving member; the first connecting piece, the second connecting piece, the third connecting piece, and the fourth connecting piece are connected in sequence.
根据本发明的一实施方式，所述第一连接片包括与所述第一承接件相接的第一连接部、以及沿所述第一侧板的延伸方向延伸的第二连接部，所述第二连接部与所述第四连接片相连。 According to an embodiment of the present invention, the first connecting piece includes a first connecting portion connected to the first receiving member and a second connecting portion extending along the extending direction of the first side plate, and the The second connecting part is connected to the fourth connecting piece.
根据本发明的一实施方式，所述第一连接片背离所述第一承接件的一侧还设有第六绝缘层；和/或，所述第一承接件与所述第一连接片相接的一面和所述第四连接片与所述第一极耳相接的一面之间形成有第一夹角，所述第一夹角的范围为80-120°；和/或，所述第一连接片与所述第一承接件焊接；和/或，所述电芯包括多个层叠设置的电极片，所述第一连接片与所述第一承接件相接的一面和所述电极片的表面平行。According to an embodiment of the present invention, a sixth insulating layer is provided on a side of the first connecting piece facing away from the first receiving member; and/or, the first receiving member is opposite to the first connecting piece. A first included angle is formed between the connecting side and the side connecting the fourth connecting piece and the first tab, and the range of the first included angle is 80-120°; and/or, the The first connecting piece is welded to the first receiving member; and/or the battery core includes a plurality of stacked electrode sheets, and the side of the first connecting piece that is in contact with the first receiving member and the The surfaces of the electrode sheets are parallel.
根据本发明的一实施方式，所述电池还包括第三绝缘层，所述第三绝缘层位于所述第一中间件和所述第一侧板之间。According to an embodiment of the present invention, the battery further includes a third insulating layer located between the first middle member and the first side plate.
根据本发明的一实施方式，所述第三绝缘层包括位于所述第四连接片背离所述第一极耳的一面的第一部分。According to an embodiment of the present invention, the third insulating layer includes a first portion located on a side of the fourth connecting piece facing away from the first tab.
根据本发明的一实施方式，所述电芯包括多个层叠设置的电极片；所述电芯具有相对设置的第一侧面和第二侧面；所述第三绝缘层还包括自所述第一部分靠近所述电芯的第一侧面的一端向靠近所述电芯的方向延伸形成的第二部分以及自所述第一部分靠近所述电芯的第二侧面的一端向靠近所述电芯的方向延伸形成的第三部分。According to an embodiment of the present invention, the battery core includes a plurality of stacked electrode sheets; the battery core has a first side and a second side arranged oppositely; the third insulating layer further includes a layer from the first part. a second part extending from an end close to the first side of the battery core in a direction close to the battery core; and from an end of the first part close to the second side of the battery core in a direction close to the battery core The extension forms the third part.
根据本发明的一实施方式，所述第一极耳在所述电芯的厚度方向上的投影位于所述第三绝缘层的第二部分在所述电芯的厚度方向上的投影内，和/或，According to an embodiment of the present invention, the projection of the first tab in the thickness direction of the battery core is located within the projection of the second part of the third insulating layer in the thickness direction of the battery core, and /or,
所述第一极耳在所述电芯的厚度方向上的投影位于所述第三绝缘层的第三部分在所述电芯的厚度方向上的投影内；和/或，所述第一极耳在所述电芯的长度方向上的投影位于所述第三绝缘层的第一部分在所述电芯的长度方向上的投影内。The projection of the first tab in the thickness direction of the battery core is located within the projection of the third part of the third insulating layer in the thickness direction of the battery core; and/or the first pole The projection of the ear in the length direction of the battery core is located within the projection of the first part of the third insulating layer in the length direction of the battery core.
根据本发明的一实施方式，所述第三绝缘层的第二部分延伸至所述电芯的第一侧面并与位于所述电芯的第一侧面的电极片粘接；和/或，所述第三绝缘层的第三部分延伸至所述电芯的第二侧面并与位于所述电芯的第二侧面的电极片粘接。According to an embodiment of the present invention, the second part of the third insulating layer extends to the first side of the battery core and is bonded to the electrode sheet located on the first side of the battery core; and/or, the The third part of the third insulating layer extends to the second side of the battery core and is bonded to the electrode sheet located on the second side of the battery core.
根据本发明的一实施方式，所述电芯包括多个层叠设置的电极片，所述电极片包括第一集流体，所述第一极耳设置在所述第一集流体上；沿所述第一承接件至所述电芯的方向，所述第一承接件与所述第一集流体之间的距离小于1毫米。According to an embodiment of the present invention, the battery core includes a plurality of stacked electrode sheets, the electrode sheets include a first current collector, and the first tab is disposed on the first current collector; along the In the direction from the first receiving member to the battery core, the distance between the first receiving member and the first current collector is less than 1 mm.
根据本发明的一实施方式，所述电芯还设有第二极耳，所述第二极耳与所述第一极耳的极性相反；所述电池还包括第二承接件，所述第二承接件与所述第二极耳电连接，所述第二承接件设置在所述第一侧板和所述电芯之间，所述第二承接件在所述第一侧板上的投影与所述第二极耳在所述第一侧板上的投影不重叠。According to an embodiment of the present invention, the battery core is further provided with a second tab, and the second tab has an opposite polarity to the first tab; the battery further includes a second receiving member, and the The second receiving member is electrically connected to the second tab. The second receiving member is disposed between the first side plate and the battery core. The second receiving member is on the first side plate. The projection of does not overlap with the projection of the second tab on the first side plate.
根据本发明的一实施方式，所述壳体包括与所述第一侧板相连接的第二侧板，所述第一极耳在所述第二侧板上的投影与所述第二极耳在所述第二侧板上的投影至少部分重叠；和/或，所述第二承接件在所述第二侧板上的投影与所述第二极耳在所述第二侧板上的投影至少部分重叠。According to an embodiment of the present invention, the housing includes a second side plate connected to the first side plate, and the projection of the first pole on the second side plate is consistent with the second pole. The projection of the ear on the second side panel at least partially overlaps; and/or the projection of the second receiving member on the second side panel and the projection of the second pole tab on the second side panel The projections at least partially overlap.
根据本发明的一实施方式，所述电池还包括位于所述第一侧板与所述电芯之间的第一承接件，所述第一承接件与所述第一极耳电连接，所述第一极耳和所述第二极耳位于所述第一承接件和第二承接件之间；和/或，所述第二承接件与所述第一侧板焊接；和/或，所 述第二极耳背离所述电芯的一侧至所述第二极耳与所述电芯相接的一侧的距离不大于所述第二承接件沿所述第一侧板至所述第二极耳的方向的长度；和/或，沿所述第一侧板至所述第二极耳的方向，所述第二承接件的长度为1mm-4mm；和/或，沿所述第一侧板至所述第二极耳的方向，所述第二承接件的长度等于或大于所述第一承接件的长度。According to an embodiment of the present invention, the battery further includes a first receiving member located between the first side plate and the battery core, and the first receiving member is electrically connected to the first tab, so The first pole tab and the second pole tab are located between the first receiving member and the second receiving member; and/or, the second receiving member is welded to the first side plate; and/or, Place The distance from the side of the second tab away from the battery core to the side of the second tab connected to the battery core is no longer than the distance from the second receiving member along the first side plate to the side of the battery core. The length in the direction of the second pole tab; and/or, along the direction from the first side plate to the second pole tab, the length of the second receiving member is 1mm-4mm; and/or, along the In the direction from the first side plate to the second pole tab, the length of the second receiving member is equal to or greater than the length of the first receiving member.
根据本发明的一实施方式，所述电芯具有相对设置的第一面和第二面，以及位于所述第一面和第二面之间的侧面，在所述电芯的至少一侧侧面的至少部分区域设有保护胶层。According to an embodiment of the present invention, the battery core has a first surface and a second surface arranged oppositely, and a side surface located between the first surface and the second surface, and at least one side surface of the battery core At least part of the area is provided with a protective adhesive layer.
根据本发明的一实施方式，所述电芯包括多个层叠设置的电极片，所述电芯的保护胶层延伸至所述电芯的第一面并与位于所述电芯的第一面的电极片粘结和/或延伸至所述电芯的第二面并与位于所述电芯的第二面的电极片粘接。According to an embodiment of the present invention, the battery core includes a plurality of stacked electrode sheets, and the protective adhesive layer of the battery core extends to the first surface of the battery core and is in contact with the first surface of the battery core. The electrode sheet is bonded and/or extended to the second side of the battery core and bonded to the electrode sheet located on the second side of the battery core.
根据本发明的一实施方式，所述保护胶层设有一个或多个第五通孔。According to an embodiment of the present invention, the protective adhesive layer is provided with one or more fifth through holes.
根据本发明的一实施方式，所述第一极耳为正极耳或负极耳；和/或，所述电芯包括叠片式电芯或卷绕式电芯。According to an embodiment of the present invention, the first tab is a positive tab or a negative tab; and/or, the battery core includes a laminated battery core or a wound battery core.
本发明中，第一承接件与第一极耳电连接，使外接片通过极柱与第一承接件连接，从而引出第一极耳的电性，其中，控制极柱为锥形结构(即沿从第一侧板至第一承接件的方向，极柱的直径呈增大或减小趋势)，能够提高外接片、第一侧板、第一承接件之间的连接稳定性和密封性能，进而提高电池的密封性、安全性、稳定性和使用寿命等品质。In the present invention, the first receiving member is electrically connected to the first pole, so that the external connecting piece is connected to the first receiving member through the pole, thereby eliciting the electrical properties of the first pole, wherein the control pole has a tapered structure (i.e. Along the direction from the first side plate to the first socket, the diameter of the pole shows an increasing or decreasing trend), which can improve the connection stability and sealing performance between the external piece, the first side plate and the first socket. , thereby improving the sealing, safety, stability and service life of the battery.
附图说明Description of drawings
图1为本发明一实施例的第一承接件与壳体的连接结构示意图；Figure 1 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention;
图2为本发明一实施例的第一承接件与壳体的连接结构示意图；Figure 2 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention;
图3为本发明一实施例的第一承接件与壳体的连接结构示意图；Figure 3 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention;
图4为本发明一实施例的外接片及极柱的结构示意图；Figure 4 is a schematic structural diagram of an external connecting piece and a pole according to an embodiment of the present invention;
图5为本发明一实施例的第一承接件与壳体的连接结构示意图；Figure 5 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention;
图6为本发明一实施例的第一承接件与壳体的连接结构示意图；Figure 6 is a schematic diagram of the connection structure between the first receiving member and the housing according to an embodiment of the present invention;
图7为本发明一实施例的第二绝缘片的结构示意图；Figure 7 is a schematic structural diagram of a second insulating sheet according to an embodiment of the present invention;
图8为本发明一实施例的电芯极耳与承接件的连接结构示意图；Figure 8 is a schematic diagram of the connection structure between the cell tabs and the receiving member according to one embodiment of the present invention;
图9为示出本发明一实施例的第一极耳与第一承接件的连接结构示意图；Figure 9 is a schematic diagram showing the connection structure of the first tab and the first receiving member according to an embodiment of the present invention;
图10为示出本发明一实施例的第一极耳与第一承接件及第三绝缘层的连接结构示意图；Figure 10 is a schematic diagram showing the connection structure of the first tab, the first receiving member and the third insulating layer according to an embodiment of the present invention;
图11为本发明一实施例的电芯封装结构示意图；Figure 11 is a schematic structural diagram of a battery core package according to an embodiment of the present invention;
图12为本发明一实施例的电芯封装结构示意图；Figure 12 is a schematic structural diagram of a battery core package according to an embodiment of the present invention;
图13为本发明一实施例的电池结构示意图。Figure 13 is a schematic structural diagram of a battery according to an embodiment of the present invention.
附图标记说明：1：壳体；11：第一侧板；12：第二侧板；13：第三侧板；14：第四侧板；15：第五侧板；16：第六侧板；17：圆弧过渡部；100：注液孔；110：第二通孔；151：减薄部；2：电芯；21：第一极耳；22：第二极耳；31：第一承接件；310：第一通 孔；32：第二承接件；41：外接片；42：极柱；43：外延部；51：第一连接片；511：第一连接部；512：第二连接部；52：第二连接片；53：第三连接片；54：第四连接片；55：第五连接片；551：第三连接部；552：第四连接部；56：第六连接片；57：第七连接片；58：第八连接片；6：第一绝缘片；60：第三通孔；7：第二绝缘片；70：第四通孔；71：第一绝缘部；72：第二绝缘部；81：第一绝缘层；82：第二绝缘层；83：第三绝缘层；84：第四绝缘层；85：第五绝缘层；86：第六绝缘层；9：保护胶层；90：第五通孔。Explanation of reference signs: 1: casing; 11: first side plate; 12: second side plate; 13: third side plate; 14: fourth side plate; 15: fifth side plate; 16: sixth side Plate; 17: arc transition part; 100: liquid injection hole; 110: second through hole; 151: thinned part; 2: battery core; 21: first pole; 22: second pole; 31: third 1. Undertaken parts; 310: First pass hole; 32: second receiving piece; 41: external connecting piece; 42: pole; 43: extension; 51: first connecting piece; 511: first connecting part; 512: second connecting part; 52: second connection piece; 53: The third connecting piece; 54: The fourth connecting piece; 55: The fifth connecting piece; 551: The third connecting part; 552: The fourth connecting part; 56: The sixth connecting piece; 57: The seventh connecting piece ;58: The eighth connecting piece; 6: The first insulating piece; 60: The third through hole; 7: The second insulating piece; 70: The fourth through hole; 71: The first insulating part; 72: The second insulating part; 81: First insulating layer; 82: Second insulating layer; 83: Third insulating layer; 84: Fourth insulating layer; 85: Fifth insulating layer; 86: Sixth insulating layer; 9: Protective glue layer; 90: Fifth through hole.
具体实施方式Detailed ways
为使本领域技术人员更好地理解本发明的方案，下面对本发明作进一步地详细说明。以下所列举具体实施方式只是对本发明的原理和特征进行描述，所举实例仅用于解释本发明，并非限定本发明的范围。基于本发明实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be described in further detail below. The specific embodiments listed below only describe the principles and features of the present invention, and the examples are only used to explain the present invention and do not limit the scope of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
在以下描述中，除非另有明确的规定和限定，术语“设置”、“安装”、“连接”、“相连”、“相接”等应做广义理解，例如，可以是固定连接、也可以是可拆卸连接，也可以是一体连接；可以是机械连接，也可以是电连接，也可以是通信连接(网络连接)；可以是直接连接，也可以是通过中间媒介间接连接，也可以是两个元件内部连通。对于本领域的普通技术人员而言，可以具体情况理解上述属于在本发明中的具体含义。此外，“第一”、“第二”、“第三”、“第四”、“第五”、“第六”、“第七”、“第八”等术语仅用于描述目的，例如区分各部件，以更清楚说明/解释技术方案，而不能理解为指示或暗示所指示的技术特征的数量或顺序等含义。此外，术语“平行”、“垂直”、“相等”等均为近似状态，所涉及的数值和数值范围为近似值，受测量、制造工艺等具体操作过程的影响，可能会存在一定范围的误差，这部分误差本领域技术人员可以认为忽略不计。In the following description, unless otherwise expressly stipulated and limited, the terms "set", "installation", "connection", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It can be a detachable connection or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection (network connection); it can be a direct connection, an indirect connection through an intermediary, or two components are internally connected. For those of ordinary skill in the art, the above-mentioned specific meanings in the present invention can be understood in specific situations. In addition, terms such as "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", etc. are used for descriptive purposes only, e.g. The various components are distinguished to illustrate/explain the technical solution more clearly, and should not be understood as indicating or implying the number or sequence of the indicated technical features. In addition, the terms "parallel", "perpendicular", "equal", etc. are all approximate, and the numerical values and numerical ranges involved are approximate. Affected by specific operating processes such as measurement and manufacturing processes, there may be a certain range of errors. Those skilled in the art can consider this part of the error to be negligible.
电池是常用的电化学储能装置，其一般包括壳体、封装在由壳体围设而成的腔体内的电芯等，电芯设有极耳(如下述的第一极耳)，需要通过导电部件(如下述的设有极柱的外接片)穿透壳体，以将腔体内的极耳的电性引出，形成电池的电极，然而，常规导电部件的连接结构密封性较差。Batteries are commonly used electrochemical energy storage devices. They generally include a casing, a battery core packaged in a cavity surrounded by the casing, etc. The battery core is provided with tabs (such as the first tab below), which require A conductive component (such as an external piece with a pole as described below) penetrates the case to lead out the electricity from the tab in the cavity to form an electrode of the battery. However, the connection structure of conventional conductive components has poor sealing.
针对上述问题，本发明实施例提供一种电池，如图1至图13所示，该电池包括：壳体1，围设成腔体；壳体1包括第一侧板11；电芯2，位于腔体内，电芯2设有第一极耳21；外接片41，与第一极耳21电连接，外接片41位于第一侧板11背离腔体的一侧，外接片41包括向外凸起形成的极柱42，第一侧板11包括与极柱42对应设置的第二通孔110，极柱42通过第二通孔110(即穿透第一侧板11)与第一极耳21相接；沿从第一侧板11至电芯2的方向，极柱42的直径呈增大或减小趋势，由此可以提高电池的密封性能。In response to the above problems, an embodiment of the present invention provides a battery, as shown in Figures 1 to 13. The battery includes: a housing 1, which is surrounded by a cavity; the housing 1 includes a first side plate 11; a battery core 2, Located in the cavity, the battery core 2 is provided with a first tab 21; an external connecting piece 41 is electrically connected to the first tab 21. The external connecting piece 41 is located on the side of the first side plate 11 away from the cavity. The external connecting piece 41 includes an external The poles 42 formed by protrusions and the first side plate 11 include second through holes 110 corresponding to the poles 42. The poles 42 communicate with the first pole through the second through holes 110 (that is, through the first side plate 11). The ears 21 are connected; along the direction from the first side plate 11 to the battery core 2, the diameter of the pole 42 shows an increasing or decreasing trend, thereby improving the sealing performance of the battery.
具体地，极柱42一般是沿外接片41的厚度方向向外凸起形成，即极柱42的轴向平行于外接片41的厚度方向。极柱42垂直于极柱42的轴向的横截面为圆形，极柱42的直 径即为极柱42垂直于极柱42的轴向的横截面的直径极柱42穿过第二通孔110，以实现穿透第一侧板11。Specifically, the pole posts 42 are generally formed to protrude outward along the thickness direction of the external connection piece 41 , that is, the axial direction of the pole pole 42 is parallel to the thickness direction of the external connection piece 41 . The cross section of the pole 42 perpendicular to the axial direction of the pole 42 is circular, and the straight section of the pole 42 is circular. The diameter is the diameter of the cross section of the pole 42 perpendicular to the axial direction of the pole 42 . The pole 42 passes through the second through hole 110 to achieve penetration of the first side plate 11 .
此外，电池还包括与第一极耳21电连接的第一承接件31，第一承接件31设置在第一侧板与电芯2之间；第一承接件31设有与极柱42对应设置的第一通孔310，极柱42通过第一通孔310与第一承接件31相连，第二通孔110与第一通孔310可以同轴设置。In addition, the battery also includes a first receiving member 31 electrically connected to the first tab 21. The first receiving member 31 is disposed between the first side plate and the battery core 2; the first receiving member 31 is provided with a corresponding pole 42. The pole 42 is connected to the first receiving member 31 through the first through hole 310 provided, and the second through hole 110 and the first through hole 310 may be coaxially arranged.
此外，沿从第一侧板11至第一承接件31的方向(亦为原料外接片41的方向或外极片41至第一侧板11/第一承接件31的方向)，极柱42的直径呈变化趋势(即增大或减小趋势)，该变化可以是逐渐变化，即以基本相同的幅度均匀增大或减小。第二通孔110、第一通孔310的孔径(直径)随极柱42的直径相应变化，例如，沿从第一侧板11至第一承接件31的方向，极柱42的直径逐渐增大，此时第二通孔110、第一通孔310的孔径也逐渐增大；沿从第一侧板11至第一承接件31的方向，极柱42的直径逐渐减小，此时第二通孔110、第一通孔310的孔径也逐渐减小。In addition, along the direction from the first side plate 11 to the first receiving member 31 (also the direction of the raw material external piece 41 or the direction from the outer pole piece 41 to the first side plate 11/first receiving member 31), the pole 42 The diameter of the diameter shows a changing trend (ie, an increasing or decreasing trend), and the change may be a gradual change, that is, a uniform increase or decrease with substantially the same amplitude. The aperture (diameter) of the second through hole 110 and the first through hole 310 changes correspondingly with the diameter of the pole 42 . For example, along the direction from the first side plate 11 to the first receiving member 31 , the diameter of the pole 42 gradually increases. Large, at this time, the diameters of the second through hole 110 and the first through hole 310 also gradually increase; along the direction from the first side plate 11 to the first receiving member 31, the diameter of the pole 42 gradually decreases, at this time the diameter of the pole 42 gradually decreases. The diameters of the second through hole 110 and the first through hole 310 are also gradually reduced.
在一些实施例中，如图5和图6所示，第一承接件31的第一通孔310包括相互连接的第一孔段和第二孔段，第二孔段位于第一孔段靠近电芯2的一侧；极柱42靠近电芯2的一端向外延伸形成有与第二孔段对应设置的外延部43。In some embodiments, as shown in FIGS. 5 and 6 , the first through hole 310 of the first receiving member 31 includes a first hole segment and a second hole segment that are connected to each other, and the second hole segment is located close to the first hole segment. On one side of the battery core 2, an end of the pole 42 close to the battery core 2 extends outward to form an extension 43 corresponding to the second hole section.
具体地，第一孔段与第二孔段可以同轴设置，第一孔段、第二孔段均为圆形通孔，第二孔段的直径大于第一孔段与第二孔段相接的一端的直径，优选地，第二孔段的直径大于第一孔段的直径，第二孔段垂直于第一通孔310的轴向的投影可以覆盖第一孔段垂直于第一通孔310的轴向的投影。Specifically, the first hole section and the second hole section can be arranged coaxially, the first hole section and the second hole section are both circular through holes, and the diameter of the second hole section is larger than that of the first hole section and the second hole section. The diameter of one end of the connection, preferably, the diameter of the second hole segment is larger than the diameter of the first hole segment, and the axial projection of the second hole segment perpendicular to the first through hole 310 can cover the first hole segment perpendicular to the first through hole 310. Axial projection of hole 310.
此外，外接片41垂直于极柱42的轴向的横截面面积可以大于极柱42垂直于极柱42的轴向的横截面面积，外接片41垂直于极柱42的轴向的投影覆盖极柱42垂直于极柱42的轴向的投影，外延部43垂直于极柱42的横截面面积大于极柱42垂直于极柱42轴向的横截面面积，外延部43垂直于极柱42的轴向的投影覆盖极柱42垂直于极柱42的轴向的投影，外接片41垂直于极柱42的轴向的横截面面积大于外延部43垂直于极柱42的轴向的横截面面积，外接片41垂直于极柱42的轴向的投影覆盖外延部43垂直于极柱42的轴向的投影，外延部43垂直于极柱42的轴向的横截面面积基本等于第二孔段垂直于极柱42的轴向的横截面面积，外延部43卡合在第二孔段，与第二孔段的侧壁相接。In addition, the cross-sectional area of the external piece 41 perpendicular to the axial direction of the pole 42 can be larger than the cross-sectional area of the pole 42 perpendicular to the axial direction of the pole 42 , and the projection of the external piece 41 perpendicular to the axial direction of the pole 42 covers the pole. The projection of the pole 42 perpendicular to the axial direction of the pole 42, the cross-sectional area of the extension 43 perpendicular to the pole 42 is larger than the cross-sectional area of the pole 42 perpendicular to the axial direction of the pole 42, the extension 43 is perpendicular to the pole 42 The axial projection covers the axial projection of the pole 42 perpendicular to the pole 42 , and the cross-sectional area of the external piece 41 perpendicular to the axial direction of the pole 42 is larger than the cross-sectional area of the extension 43 perpendicular to the axial direction of the pole 42 , the projection of the external piece 41 perpendicular to the axial direction of the pole 42 covers the projection of the extension 43 perpendicular to the axial direction of the pole 42 , and the cross-sectional area of the extension 43 perpendicular to the axial direction of the pole 42 is substantially equal to the second hole section With a cross-sectional area perpendicular to the axial direction of the pole 42, the extension 43 is engaged in the second hole section and connected with the side wall of the second hole section.
如图5和图6所示，极柱42靠近电芯2的一端面可以与第一承接件31靠近电芯2的一侧表面齐平。具体地，外延部43沿第一通孔310的轴向(亦为极柱42的轴向)的厚度基本等于第二孔段沿第一通孔310的轴向的深度，由此，外延部43卡扣在第二孔段中，外延部43靠近电芯2的一端面与第一承接件31面向电芯2的一侧表面齐平，不仅可以保证极柱42和第一承接件31的结合强度，而且防止极柱42对第一极耳21或者第一连接片51与第一承接件31的连接造成干涉。As shown in FIGS. 5 and 6 , an end surface of the pole 42 close to the battery core 2 may be flush with a surface of the first receiving member 31 close to the battery core 2 . Specifically, the thickness of the extension portion 43 along the axial direction of the first through hole 310 (also the axial direction of the pole post 42 ) is substantially equal to the depth of the second hole segment along the axial direction of the first through hole 310 , whereby the extension portion 43 is buckled in the second hole section, and the end surface of the extension portion 43 close to the battery core 2 is flush with the surface of the first receiving member 31 facing the battery core 2, which not only ensures the connection between the pole post 42 and the first receiving member 31 The bonding strength is high, and the pole post 42 is prevented from interfering with the first pole lug 21 or the connection between the first connecting piece 51 and the first receiving member 31 .
此外，极柱42靠近电芯2的一端也可以伸出第一通孔310，并沿第一通孔310的周向向外延伸形成有与第一承接件31靠近电芯2的一侧表面相接的外延部43，即极柱42 靠近电芯2的一端面不与第一承接件31面向电芯2的一侧表面齐平，而是位于第一承接件31与电芯2之间。In addition, the end of the pole 42 close to the battery core 2 can also extend out of the first through hole 310 and extend outward along the circumferential direction of the first through hole 310 to form a side surface of the first receiving member 31 close to the battery core 2 The connected extension part 43 is the pole 42 The end surface close to the battery core 2 is not flush with the side surface of the first receiving member 31 facing the battery core 2 , but is located between the first receiving member 31 and the battery core 2 .
其中，外延片、极柱42、外延部43可以一体成型，其可以是金属材质，具体实施时，可以使第一承接件31与第一侧板11通过铆钉进行铆接，经铆接之后，铆钉位于第一侧板11背离腔体的一端形成外接片41，另一端形成外延部43，而其两端之间的部分形成极柱42，所形成的极柱42例如是锥形结构。Among them, the epitaxial sheet, pole post 42, and epitaxial portion 43 can be integrally formed, and they can be made of metal. During specific implementation, the first receiving member 31 and the first side plate 11 can be riveted through rivets. After riveting, the rivets are located at One end of the first side plate 11 away from the cavity forms an external piece 41 , the other end forms an extension 43 , and the portion between the two ends forms a pole 42 , and the formed pole 42 is, for example, a tapered structure.
在一实施方式中，第一极耳21可以和壳体1电连接，此时外接片41、极柱42、第一承接件31可以和壳体1直接接触。In one embodiment, the first tab 21 can be electrically connected to the housing 1 , and at this time, the external connecting piece 41 , the pole post 42 , and the first receiving member 31 can be in direct contact with the housing 1 .
在另一个具体的实施方式中，第一极耳21与壳体1绝缘，具体可以通过设置绝缘片(绝缘层)进行绝缘。In another specific embodiment, the first tab 21 is insulated from the casing 1 , specifically by providing an insulating sheet (insulating layer).
在一些实施例中，如图1至图3、图5和图6、图13所示，外接片41与第一侧板11之间还设有第一绝缘片6，第一承接件31与第一侧板11之间还设有第二绝缘片7，即外接片41、第一绝缘片6、第一侧板11、第二绝缘片7、第一承接件31依次层叠设置，极柱42穿透第一绝缘片6和第二绝缘片7；极柱42与第一侧板11之间设有第一绝缘层81，由此，外接片41、极柱42、第一承接件31和第一极耳21电连接，而与第一侧板11(壳体1)绝缘连接。其中，沿第一通孔310的周向，第一通孔310的孔径与极柱42的直径之差基本等于第一绝缘层81沿第一通孔310的周向的宽度，该第一通孔310的周向与第一通孔310的轴向垂直。具体地，第一绝缘层81可以与第一绝缘片6一体成型，第一绝缘层81由第一绝缘片6靠近第一侧板11的一侧向外凸起(向第二通孔110内凸起)形成；或者第一绝缘层81可以与第二绝缘片7一体成型，第一绝缘层81由第二绝缘片靠近第一侧板的一侧向外凸起(向第二通孔110内凸起)形成。In some embodiments, as shown in Figures 1 to 3, 5, 6, and 13, a first insulating sheet 6 is disposed between the external piece 41 and the first side plate 11, and the first receiving member 31 and There is also a second insulating sheet 7 between the first side plates 11, that is, the external connecting sheet 41, the first insulating sheet 6, the first side plate 11, the second insulating sheet 7, and the first receiving member 31 are stacked in sequence. 42 penetrates the first insulating sheet 6 and the second insulating sheet 7; a first insulating layer 81 is provided between the pole 42 and the first side plate 11, whereby the external connecting piece 41, the pole 42, and the first receiving member 31 It is electrically connected to the first tab 21 and insulatedly connected to the first side plate 11 (casing 1). Wherein, along the circumferential direction of the first through hole 310 , the difference between the diameter of the first through hole 310 and the diameter of the pole 42 is substantially equal to the width of the first insulating layer 81 along the circumferential direction of the first through hole 310 . The circumferential direction of the hole 310 is perpendicular to the axial direction of the first through hole 310 . Specifically, the first insulating layer 81 can be integrally formed with the first insulating sheet 6 , and the first insulating layer 81 protrudes outward from the side of the first insulating sheet 6 close to the first side plate 11 (into the second through hole 110 protrusions); or the first insulating layer 81 can be integrally formed with the second insulating sheet 7, and the first insulating layer 81 protrudes outward from the side of the second insulating sheet close to the first side plate (toward the second through hole 110 Inner bulge) is formed.
相应地，第一绝缘片6设有第三通孔60，极柱42穿过第三通孔60，以实现穿透第一绝缘片6；第二绝缘片7设有第四通孔70，极柱42穿过第四通孔70，以实现穿透第二绝缘片7。具体地，极柱42依次穿过第三通孔60、第二通孔110、第四通孔70、第一通孔310，以实现与第一承接件31连接。其中，第三通孔60、第二通孔110、第四通孔70、第一通孔310可以同轴设置。Correspondingly, the first insulating sheet 6 is provided with a third through hole 60, and the pole post 42 passes through the third through hole 60 to penetrate the first insulating sheet 6; the second insulating sheet 7 is provided with a fourth through hole 70, The pole post 42 passes through the fourth through hole 70 to penetrate the second insulating sheet 7 . Specifically, the pole 42 passes through the third through hole 60 , the second through hole 110 , the fourth through hole 70 , and the first through hole 310 in order to achieve connection with the first receiving member 31 . The third through hole 60 , the second through hole 110 , the fourth through hole 70 and the first through hole 310 may be coaxially arranged.
如图1至图3所示、图5和图6、图13所示，第一绝缘片6在第一侧板11上的投影可以覆盖外接片41在第一侧板11上的投影(即外接片41在第一侧板11上的投影在第一绝缘片6在第一侧板11上的投影内)，从而防止外接片41与壳体1接触，保证壳体的绝缘。另外，第二绝缘片7在第一侧板11上的投影覆可以盖第一承接件31在第一侧板11上的投影(即第一承接件31在第一侧板11上的投影在第二绝缘片7在第一侧板11上的投影内)，从而防止第一承接件31与壳体1接触，保证壳体的绝缘性。由此，可以进一步提高电池安全性和稳定性等性能。As shown in Figures 1 to 3, Figure 5, Figure 6, and Figure 13, the projection of the first insulating sheet 6 on the first side panel 11 can cover the projection of the external sheet 41 on the first side panel 11 (i.e. The projection of the external piece 41 on the first side plate 11 is within the projection of the first insulating piece 6 on the first side plate 11 ), thereby preventing the external piece 41 from contacting the housing 1 and ensuring the insulation of the housing. In addition, the projection of the second insulating sheet 7 on the first side panel 11 can cover the projection of the first receiving member 31 on the first side panel 11 (that is, the projection of the first receiving member 31 on the first side panel 11 is The second insulating sheet 7 is within the projection of the first side plate 11 ), thereby preventing the first receiving member 31 from contacting the housing 1 and ensuring the insulation of the housing. As a result, battery performance such as safety and stability can be further improved.
如图5和图7所示，壳体1还包括与第一侧板11相连的第六侧板16，第二绝缘片7可以是L型结构，其包括相连的第一绝缘部71和第二绝缘部72，第一绝缘部71位于第 一承接件31与第一侧板11之间，极柱42穿透第一绝缘部71，即第一绝缘部71上设有与极柱42对应设置的第四通孔70，第二绝缘部72位于第一承接件31与第六侧板16之间，由此，通过第二绝缘部72，可以为第一承接件31提供支撑，并可以使第一承接件31与壳体1的第六侧板16之间绝缘，提高电池的安全性和稳定性等性能。As shown in Figures 5 and 7, the housing 1 also includes a sixth side plate 16 connected to the first side plate 11. The second insulating sheet 7 can be an L-shaped structure, which includes a connected first insulating part 71 and a third insulating part 71. The second insulating part 72, the first insulating part 71 is located at the Between a receiving member 31 and the first side plate 11, the pole 42 penetrates the first insulating part 71, that is, the first insulating part 71 is provided with a fourth through hole 70 corresponding to the pole 42, and the second insulating part 72 is located between the first receiving member 31 and the sixth side plate 16. Therefore, the second insulating part 72 can provide support for the first receiving member 31, and can connect the first receiving member 31 with the third side of the housing 1. The six side plates 16 are insulated to improve the safety and stability of the battery.
其中，第一绝缘部71在第一侧板11上的投影覆可以盖第一承接件31在第一侧板11上的投影(即第一承接件31在第一侧板11上的投影在第一绝缘部71在第一侧板11上的投影内)，第二绝缘部72在第六侧板16上的投影覆可以覆盖第一承接件31在第六侧板16上的投影(即第一承接件31在第六侧板16上的投影在第二绝缘部72在第六侧板16上的投影内)，以防止第一承接件31与第一侧板11或者第六侧板16接触。The projection of the first insulating part 71 on the first side panel 11 can cover the projection of the first receiving member 31 on the first side panel 11 (that is, the projection of the first receiving member 31 on the first side panel 11 is The projection of the first insulating part 71 on the first side panel 11), and the projection of the second insulating part 72 on the sixth side panel 16 can cover the projection of the first receiving member 31 on the sixth side panel 16 (i.e. The projection of the first receiving part 31 on the sixth side plate 16 is within the projection of the second insulating part 72 on the sixth side plate 16) to prevent the first receiving part 31 from contacting the first side plate 11 or the sixth side plate. 16 contacts.
其中，第六侧板16的表面与电极片的表面平行；第六侧板16与第一侧板11的表面不平行，例如垂直；第六侧板16与第二侧板12的表面不平行，例如垂直；第六侧板16例如可为底侧板(或称底板)。Wherein, the surface of the sixth side plate 16 is parallel to the surface of the electrode sheet; the surface of the sixth side plate 16 and the first side plate 11 are not parallel, for example, perpendicular; the surface of the sixth side plate 16 and the second side plate 12 are not parallel. , such as vertical; the sixth side plate 16 may be, for example, a bottom side plate (or bottom plate).
此外，第一绝缘部71与第一承接件31相接的一面和第二绝缘部72与第一承接件31相接的一面之间形成有夹角，该夹角的范围可以为80°～140°，例如80°、90°、100°、110°、120°、130°、140°等，即二者不平行，例如垂直。第一绝缘部71与第二绝缘部72(二者所在平面)之间形成的夹角范围可以为80°～140°，例如80°、90°、100°、110°、120°、130°、140°等，即二者不平行，例如垂直。In addition, an included angle is formed between the surface of the first insulating part 71 and the first receiving member 31 and the surface of the second insulating part 72 and the first receiving member 31. The included angle may range from 80° to 80°. 140°, such as 80°, 90°, 100°, 110°, 120°, 130°, 140°, etc., that is, the two are not parallel, such as perpendicular. The included angle formed between the first insulating part 71 and the second insulating part 72 (the plane where they are located) may range from 80° to 140°, such as 80°, 90°, 100°, 110°, 120°, 130°. , 140°, etc., that is, they are not parallel, such as perpendicular.
如图11至图13所示，第一承接件31在第一侧板11上的投影与第一极耳21在第一侧板11上的投影不重叠(即第一承接件31平行于在第一侧板11的延伸方向的投影与第一极耳21平行于第一侧板11的延伸方向的投影不重叠)，由此，第一极耳21和第一承接件31不沿电芯2至第一侧板11的方向分布，具体来说，在沿第一侧板11至电芯2的方向上，第一侧板11至电芯2的距离为a1，第一极耳21与电芯2相接的一侧至第一极耳21背离电芯2的一侧(即面向第一侧板11的一侧)的距离为b1，第一承接件31面向电芯2的一侧(即背离第一侧板11的一侧)至第一承接件31面向第一侧板11的一侧(即第一承接件31在沿第一侧板11至电芯2的方向上的长度)为c1，a1＜b1+c1，由此，相比于极耳和承接件沿壳体的长度方向排布的现有技术，该实施例的技术方案可使得电芯和第一侧板之间的空间得到充分的利用，可以节约腔体空间，从而可增大电芯的尺寸，提高电池的能量密度等性能。As shown in FIGS. 11 to 13 , the projection of the first receiving member 31 on the first side plate 11 does not overlap with the projection of the first tab 21 on the first side plate 11 (that is, the first receiving member 31 is parallel to the first side plate 11 ). The projection of the extension direction of the first side plate 11 does not overlap with the projection of the first tab 21 parallel to the extension direction of the first side plate 11). Therefore, the first tab 21 and the first receiving member 31 do not extend along the direction of the battery core. 2 is distributed in the direction from the first side plate 11 to the battery core 2. Specifically, in the direction from the first side plate 11 to the battery core 2, the distance from the first side plate 11 to the battery core 2 is a 1 , and the first tab 21 The distance from the side connected to the battery core 2 to the side of the first tab 21 facing away from the battery core 2 (that is, the side facing the first side plate 11 ) is b 1 , and the first receiving member 31 faces the side of the battery core 2 One side (that is, the side away from the first side plate 11 ) to the side of the first receiving member 31 facing the first side plate 11 (that is, the first receiving member 31 is in the direction along the first side plate 11 to the battery core 2 length) is c 1 , a 1 < b 1 +c 1 , therefore, compared with the prior art in which the pole tabs and receiving members are arranged along the length direction of the housing, the technical solution of this embodiment can make the battery core The space between the first side plate and the first side plate is fully utilized, which can save the cavity space, thereby increasing the size of the battery core and improving the energy density and other performance of the battery.
本实施例中，第一侧板11的延伸方向与第一侧板11的表面平行，第一侧板11至电芯2的方向可以平行于壳体1的长度方向，第一侧板11的延伸方向可以是壳体1的宽度方向或壳体1的厚度方向。示例性地，如图13所示，第一侧板11的延伸方向是壳体1的宽度方向。In this embodiment, the extension direction of the first side plate 11 is parallel to the surface of the first side plate 11 , and the direction from the first side plate 11 to the battery core 2 can be parallel to the length direction of the housing 1 . The extending direction may be the width direction of the housing 1 or the thickness direction of the housing 1 . For example, as shown in FIG. 13 , the extending direction of the first side plate 11 is the width direction of the housing 1 .
一般情况下，壳体1的长度方向亦为电芯2的长度方向，壳体1的宽度方向亦为电芯2的宽度方向，壳体1的厚度方向亦为电芯2的厚度方向。此外，电芯2可以包括多个层叠设置的电极片，电极片沿电芯2的厚度方向层叠设置，即电芯2的厚度方向亦为电极片 的厚度方向。Generally, the length direction of the housing 1 is also the length direction of the battery core 2, the width direction of the housing 1 is also the width direction of the battery core 2, and the thickness direction of the housing 1 is also the thickness direction of the battery core 2. In addition, the battery core 2 may include a plurality of stacked electrode sheets. The electrode sheets are stacked along the thickness direction of the battery core 2 . That is, the thickness direction of the battery core 2 is also the electrode sheet. thickness direction.
如图11至图13所示，壳体1包括与第一侧板11相连接的第二侧板12，第一承接件31在第二侧板12上的投影与第一极耳21在第二侧板12上的投影至少部分重叠(即第一承接件31垂直于第一侧板11的延伸方向的投影与第一极耳21垂直于第一侧板11的延伸方向的投影至少部分重叠)，即第一承接件31与第一极耳21沿第一侧板11的延伸方向分布，由此，便于第一承接件31与第一极耳21的连接，进一步节约腔体空间，提高电池的能量密度等性能。As shown in FIGS. 11 to 13 , the housing 1 includes a second side plate 12 connected to the first side plate 11 . The projection of the first receiving member 31 on the second side plate 12 is consistent with the position of the first tab 21 on the second side plate 12 . The projections on the two side plates 12 at least partially overlap (that is, the projection of the first receiving member 31 perpendicular to the extension direction of the first side plate 11 and the projection of the first tab 21 perpendicular to the extension direction of the first side plate 11 at least partially overlap. ), that is, the first receiving member 31 and the first tab 21 are distributed along the extending direction of the first side plate 11 , thereby facilitating the connection between the first receiving member 31 and the first tab 21 , further saving the cavity space, and improving the Battery energy density and other properties.
具体地，第二侧板12的表面可以与第一侧板11的表面垂直，第二侧板12的表面与第六侧板16的表面垂直，第二侧板12的表面与电极片的表面垂直(与电极片的厚度方向平行)。Specifically, the surface of the second side plate 12 may be perpendicular to the surface of the first side plate 11 , the surface of the second side plate 12 may be perpendicular to the surface of the sixth side plate 16 , and the surface of the second side plate 12 may be perpendicular to the surface of the electrode sheet. Vertical (parallel to the thickness direction of the electrode sheet).
在一些具体实施例中，如图11至图13所示，第一承接件31垂直于电芯2的宽度方向的投影与第一极耳21垂直于电芯2的宽度方向的投影至少部分重叠，即第一承接件31与第一极耳21沿电芯2的宽度方向分布。In some specific embodiments, as shown in FIGS. 11 to 13 , the projection of the first receiving member 31 perpendicular to the width direction of the battery core 2 at least partially overlaps with the projection of the first tab 21 perpendicular to the width direction of the battery core 2 . , that is, the first receiving member 31 and the first tab 21 are distributed along the width direction of the battery core 2 .
在一些实施例中，第一极耳21背离电芯2的一侧至第一极耳21与电芯2相接的一侧的距离不大于第一承接件31沿第一侧板11至第一极耳21的方向的长度(即第一承接件31在沿第一侧板11至第一极耳21的方向上的长度)，即增大第一承接件31在第二侧板12上的投影与第一极耳21在第二侧板12上的投影的重叠区域，从而实现对第一极耳21在电芯的宽度方向上的保护，防止第一极耳21在电池的跌落或碰撞过程中脱落，同时，还可进一步扩大电芯的电极片的面积，利于进一步提高电池能量密度等性能。In some embodiments, the distance from the side of the first tab 21 away from the battery core 2 to the side where the first tab 21 is connected to the battery core 2 is no longer than the distance from the first receiving member 31 to the first side plate 11 along the first side plate 11 . The length of one pole lug 21 (that is, the length of the first receiving member 31 in the direction along the first side plate 11 to the first pole lug 21 ), that is, increasing the length of the first receiving member 31 on the second side plate 12 The overlap area between the projection of the first tab 21 and the projection of the first tab 21 on the second side plate 12 is thereby achieved to protect the first tab 21 in the width direction of the battery core and prevent the first tab 21 from falling or falling of the battery. It falls off during the collision, and at the same time, the area of the electrode sheet of the battery core can be further expanded, which is beneficial to further improving the battery energy density and other performance.
在一些实施例中，第一承接件31在沿第一侧板11至第一极耳21的方向的长度c1为1mm-3mm，例如1mm、1.5mm、2mm、2.5mm、3mm等。In some embodiments, the length c1 of the first receiving member 31 in the direction from the first side plate 11 to the first tab 21 is 1 mm to 3 mm, such as 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.
具体地，第一承接件31可以是块状(或称第一转接块)，其厚度方向可以平行于从第一侧板11至第一极耳21的方向，即第一承接件31在沿第一侧板11至第一极耳21的方向的长度即为第一承接件31的厚度。Specifically, the first receiving member 31 may be block-shaped (or called a first adapter block), and its thickness direction may be parallel to the direction from the first side plate 11 to the first tab 21 , that is, the first receiving member 31 is in the shape of a block. The length along the direction from the first side plate 11 to the first tab 21 is the thickness of the first receiving member 31 .
此外，上述电池还可以包括位于电芯2与第一侧板11之间的第一中间件，第一中间件分别与第一极耳21和第一承接件31连接(即第一承接件31通过第一中间件与第一极耳21连接)，具体可以是第一承接件31、第一中间件、第一极耳21依次焊接。In addition, the above-mentioned battery may also include a first middle piece located between the battery core 2 and the first side plate 11 . The first middle piece is connected to the first tab 21 and the first receiving member 31 respectively (i.e., the first receiving member 31 The first middle piece is connected to the first tab 21), specifically, the first receiving piece 31, the first middle piece, and the first tab 21 can be welded in sequence.
具体地，第一中间件可以包括与第一承接件31连接的第一连接片51、与第一极耳21的背离电芯2的一侧相接的第四连接片54。Specifically, the first middle piece may include a first connecting piece 51 connected to the first receiving member 31 and a fourth connecting piece 54 connected to a side of the first tab 21 away from the battery core 2 .
如图8至图11所示，第一中间件可以具有弯折结构，第一连接片51与第一承接件31相接，第四连接片54与第一极耳21相接，具体可以是焊接，第一承接件31与第一连接片51相接的一面和第四连接片54与第一极耳21相接的一面之间形成有第一夹角，第一夹角的范围为80-140°，例如80°、90°、100°、120°、130°、140°等，即第一承接件31与第一连接片51相接的一面和第四连接片54与第一极耳21相接的一面不平行，例如垂直。由此，将第一承接件31与第一连接片51的相接面和第四连接片54与第一极耳21的 相接面错开，使该两个相接面基本沿电芯的宽度方向排布，不仅可以减小第一承接件31和第一连接片51在腔体内的占用空间，同时，使得第一承接件31与第一连接片51的连接以及第四连接片54和第一极耳21的连接互不干涉，还可以进一步提高第一承接件31通过第一中间件与第一极耳21连接的稳定性，进而提高电池的稳定性、安全性和使用寿命等品质。As shown in Figures 8 to 11, the first middle piece may have a bent structure, the first connecting piece 51 is connected to the first receiving member 31, and the fourth connecting piece 54 is connected to the first tab 21. Specifically, it may be Welding, a first included angle is formed between the side of the first receiving member 31 that connects to the first connecting piece 51 and the side that connects the fourth connecting piece 54 to the first tab 21 , and the range of the first included angle is 80 -140°, such as 80°, 90°, 100°, 120°, 130°, 140°, etc., that is, the side where the first receiving member 31 is connected to the first connecting piece 51 and the fourth connecting piece 54 is connected to the first pole. The connecting surfaces of the ears 21 are not parallel, for example vertical. As a result, the contact surface between the first receiving member 31 and the first connecting piece 51 and the connecting surface between the fourth connecting piece 54 and the first tab 21 are connected. The contact surfaces are staggered so that the two contact surfaces are basically arranged along the width direction of the battery core, which not only reduces the space occupied by the first receiving member 31 and the first connecting piece 51 in the cavity, but also makes the first receiving member The connection between the member 31 and the first connecting piece 51 and the connection between the fourth connecting piece 54 and the first tab 21 do not interfere with each other, and the connection between the first receiving member 31 and the first tab 21 through the first intermediate piece can be further improved. Stability, thereby improving the stability, safety and service life of the battery.
此外，第一承接件31与第一连接片51相接的一面和第一承接件31面向第一侧板11的一面之间形成有第三夹角，第三夹角的范围为80-140°，例如80°、90°、100°、120°、130°、140°，即二者不平行，例如可以垂直。第一承接件31与第一连接片51相接的一面例如为第一承接件31的顶面。In addition, a third included angle is formed between the side of the first receiving member 31 that is in contact with the first connecting piece 51 and the side of the first receiving member 31 facing the first side plate 11 , and the range of the third included angle is 80-140. °, such as 80°, 90°, 100°, 120°, 130°, 140°, that is, the two are not parallel, for example, they can be perpendicular. The side of the first receiving member 31 that is in contact with the first connecting piece 51 is, for example, the top surface of the first receiving member 31 .
此外，电芯2包括多个层叠设置的电极片，第一连接片51与第一承接件31相接的一面可以和电极片的表面平行。In addition, the battery core 2 includes a plurality of stacked electrode sheets, and the side of the first connecting sheet 51 that is in contact with the first receiving member 31 may be parallel to the surface of the electrode sheets.
在一些实施例中，如图8所示，第一中间件还包括分别与第一连接片51和第四连接片54连接起来的第一连接组件，第一连接组件包括第二连接片52和第三连接片53，第二连接片52位于第一承接件31与电芯2之间；在从第一承接件31至第一极耳21的方向上，第三连接片53位于第一承接件31和第一极耳21之间；所述第一连接片51、第二连接片52、第三连接片53、第四连接片54依次相连。In some embodiments, as shown in FIG. 8 , the first middleware further includes a first connecting component connected to the first connecting piece 51 and the fourth connecting piece 54 respectively. The first connecting component includes a second connecting piece 52 and a fourth connecting piece 54 . The third connecting piece 53 and the second connecting piece 52 are located between the first receiving member 31 and the battery core 2; in the direction from the first receiving member 31 to the first tab 21, the third connecting piece 53 is located between the first receiving member 31 and the battery core 2. Between the component 31 and the first tab 21; the first connecting piece 51, the second connecting piece 52, the third connecting piece 53, and the fourth connecting piece 54 are connected in sequence.
具体地，第一中间件具有多重弯折结构，其第一连接片51依次通过第二连接片52和第三连接片53与第四连接片54相接，第一连接片51的表面与第二连接片52的表面不平行，例如垂直，第二连接片52的表面与第三连接片53的表面不平行，可以垂直或不垂直，第四连接片54的表面与第二连接片52的表面可以平行，由此，通过设置多重弯折的第一连接片51、第二连接片52、第三连接片53与第四连接片54，以防止第一中间件在左右方向和前后方向晃动，可以进一步提高第一承接件31与第一极耳21连接的稳定性。Specifically, the first middle piece has a multiple bending structure, and its first connecting piece 51 is connected to the fourth connecting piece 54 through the second connecting piece 52 and the third connecting piece 53 in sequence, and the surface of the first connecting piece 51 is connected to the fourth connecting piece 54 . The surfaces of the two connecting pieces 52 are not parallel, for example, perpendicular. The surfaces of the second connecting piece 52 and the third connecting piece 53 are not parallel, and may be perpendicular or non-perpendicular. The surfaces of the fourth connecting piece 54 and the surfaces of the second connecting piece 52 are not parallel. The surfaces can be parallel. Therefore, by arranging the first connecting piece 51, the second connecting piece 52, the third connecting piece 53 and the fourth connecting piece 54 with multiple bends, the first middle piece can be prevented from shaking in the left and right and front and rear directions. , the stability of the connection between the first receiving member 31 and the first tab 21 can be further improved.
在另一些实施例中，如图9至图12所示，第一连接片51包括与第一承接件31相接的第一连接部511、以及沿第一侧板11的延伸方向(如从第一承接件31至第一极耳21的方向)延伸的第二连接部512，第二连接部512与第四连接片54相连。In other embodiments, as shown in FIGS. 9 to 12 , the first connecting piece 51 includes a first connecting portion 511 connected with the first receiving member 31 , and a first connecting portion 511 connected to the first side plate 11 along the extending direction (such as from The second connecting portion 512 extends from the first receiving member 31 to the direction of the first tab 21 , and the second connecting portion 512 is connected to the fourth connecting piece 54 .
其中，第一连接部511与第二连接部512位于第一承接件31的同一侧，亦位于第一极耳21的同一侧，第一连接部511具体可以位于第一承接件31背离第六侧板16的一侧(面向第五侧板15的一侧)，第二连接部512具体可以位于第一极耳21背离第六侧板16的一侧，第二连接部512面向第一极耳21的一面和第四连接片54与第二极耳22相接的一面之间形成的夹角的范围可以为80-140°，例如80°、90°、100°、120°、130°、140°，即二者不平行，例如垂直。The first connecting part 511 and the second connecting part 512 are located on the same side of the first receiving member 31 and on the same side of the first tab 21 . Specifically, the first connecting part 511 may be located on the first receiving member 31 away from the sixth On one side of the side plate 16 (the side facing the fifth side plate 15 ), the second connecting portion 512 can be specifically located on the side of the first tab 21 away from the sixth side plate 16 , and the second connecting portion 512 faces the first pole. The angle formed between one side of the lug 21 and the side where the fourth connecting piece 54 and the second pole lug 22 are connected may range from 80° to 140°, such as 80°, 90°, 100°, 120°, and 130°. , 140°, that is, they are not parallel, such as perpendicular.
具体地，第一连接部511与第二连接部512可以一体成型，形成第一连接片51，第一连接部511与第二连接部512的表面可以基本齐平，即第一连接片51可以是直型结构，而没有较大程度的弯折，但不局限于此。第一连接片51的表面与第四连接片54的表面不平行，例如垂直。 Specifically, the first connecting part 511 and the second connecting part 512 can be integrally formed to form the first connecting piece 51 , and the surfaces of the first connecting part 511 and the second connecting part 512 can be substantially flush, that is, the first connecting piece 51 can be It is a straight structure without a large degree of bending, but it is not limited to this. The surface of the first connecting piece 51 and the surface of the fourth connecting piece 54 are not parallel, for example, perpendicular.
此外，第一连接片51与第一承接件31可以是焊接，并在第一连接片51背离第一承接件31的一侧形成有焊印。其中，当第一连接片51包括上述第一连接部511和第二连接部512时，第一连接部511与第一承接件31可以是焊接，并在第一连接部511背离第一承接件31的一侧形成有焊印。具体地，第一承接件31在电芯2的厚度方向上的投影与第一连接片51在电芯2的厚度方向上的投影存在重叠区域，二者的焊接区域位于该重叠区域内。In addition, the first connecting piece 51 and the first receiving member 31 may be welded, and a welding mark is formed on the side of the first connecting piece 51 away from the first receiving member 31 . Wherein, when the first connecting piece 51 includes the above-mentioned first connecting part 511 and the second connecting part 512, the first connecting part 511 and the first receiving part 31 may be welded, and the first connecting part 511 is away from the first receiving part. A weld mark is formed on one side of 31. Specifically, there is an overlapping area between the projection of the first receiving member 31 in the thickness direction of the battery core 2 and the projection of the first connecting piece 51 in the thickness direction of the battery core 2, and the welding area between the two is located in the overlapping area.
如图13所示，第一连接片51(或第一连接片51的第一连接部511)背离第一承接件31的一侧还设有第六绝缘层86。As shown in FIG. 13 , a sixth insulating layer 86 is also provided on the side of the first connecting piece 51 (or the first connecting portion 511 of the first connecting piece 51 ) away from the first receiving member 31 .
如图10至图13所示，上述电池还可以包括第三绝缘层83，第三绝缘层83位于第一中间件和第一侧板11之间。具体地，第三绝缘层83可以包括位于第四连接片54背离第一极耳21的一面的第一部分。As shown in FIGS. 10 to 13 , the above battery may further include a third insulating layer 83 located between the first middle member and the first side plate 11 . Specifically, the third insulating layer 83 may include a first portion located on a side of the fourth connecting piece 54 facing away from the first tab 21 .
在一些实施例中，电芯2包括多个层叠设置的电极片，电芯2具有相对设置的第一面和第二面，第三绝缘层83还包括自第一部分靠近电芯2的第一面的一端向靠近电芯2的方向延伸形成的第二部分以及自第一部分靠近电芯2的第二面的一端向靠近电芯2的方向延伸形成的第三部分。In some embodiments, the battery core 2 includes a plurality of stacked electrode sheets. The battery core 2 has a first surface and a second surface that are oppositely arranged. The third insulating layer 83 also includes a first portion close to the battery core 2 from the first portion. A second part is formed from one end of the second surface extending in a direction close to the battery core 2 and a third part is formed in a direction extending from an end of the first part close to the second surface of the battery core 2 in a direction close to the battery core 2 .
如图10至图13所示，第三绝缘层83的第二部分、第一部分和第三部分依次相连，并围设成第一凹槽，第一凹槽的底壁为第三绝缘层83的第一部分，侧壁分别为第三绝缘层83的第二部分和第三部分，第一极耳21、以及第一中间件与第一极耳21相接的部分(如第四连接片54、第一连接片51位于第一极耳21侧面的第二连接部512)位于第一凹槽内，被第三绝缘层83覆盖，从而避免第一极耳21或第一连接片51与壳体接触，同时对第一极耳21和第一中间件起到保护的作用，防止第一极耳21和第一中间件在电池跌落过程中与壳体发生磕碰，由此，可进一步提高电池的稳定性和安全性等性能。As shown in FIGS. 10 to 13 , the second part, the first part and the third part of the third insulating layer 83 are connected in sequence and surrounded by a first groove. The bottom wall of the first groove is the third insulating layer 83 The first part and the side walls are respectively the second part and the third part of the third insulating layer 83, the first tab 21, and the part where the first middle piece is connected to the first tab 21 (such as the fourth connecting piece 54 , the second connecting portion 512) of the first connecting piece 51 on the side of the first tab 21 is located in the first groove and is covered by the third insulating layer 83, thereby preventing the first tab 21 or the first connecting piece 51 from contacting the shell. It also protects the first tab 21 and the first middle piece, preventing the first tab 21 and the first middle piece from colliding with the casing when the battery is dropped, thereby further improving the battery life. performance such as stability and security.
具体来说，第一极耳21具有相对的第一侧面和第二侧面，第一极耳21的第一侧面与第一极耳21的第二侧面分别位于第一极耳21与第四连接片54相接的一面(即第一极耳21背离电芯2的一面)的相对两侧。当第一连接片51和第四连接片54通过第一连接组件(即第二连接片52和第三连接片53)连接时(如图8所示)，第三绝缘层83包括位于第四连接片54背离第一极耳21的一面的第一部分、位于第一极耳21的第一侧面的第二部分、位于第一极耳21的第二侧面的第三部分；当第一中间件的第一连接片51包括第一连接部511和第二连接部512时(如图9至图12所示)，第二连接部512延伸至第一极耳21的第一侧面，第三绝缘层83包括位于第四连接片54背离第一极耳21的一面的第一部分、位于第二连接部512背离第一极耳21的一面的第二部分、位于第一极耳21背离第二连接部512的一面(第二侧面)的第三部分。Specifically, the first tab 21 has an opposite first side and a second side. The first side of the first tab 21 and the second side of the first tab 21 are respectively located between the first tab 21 and the fourth connection. The opposite sides of the side where the sheets 54 are connected (that is, the side of the first tab 21 facing away from the battery core 2). When the first connecting piece 51 and the fourth connecting piece 54 are connected through the first connecting component (ie, the second connecting piece 52 and the third connecting piece 53) (as shown in FIG. 8), the third insulating layer 83 includes The first part of the side of the connecting piece 54 facing away from the first pole 21 , the second part located on the first side of the first pole 21 , and the third part located on the second side of the first pole 21 ; when the first middle piece When the first connecting piece 51 includes a first connecting part 511 and a second connecting part 512 (as shown in FIGS. 9 to 12 ), the second connecting part 512 extends to the first side of the first tab 21 , and the third insulation The layer 83 includes a first portion located on a side of the fourth connecting piece 54 facing away from the first tab 21 , a second portion located on a side of the second connecting portion 512 facing away from the first tab 21 , and a second portion located on a side of the first tab 21 facing away from the second connection. The third part of one side (the second side) of the part 512.
在一些实施例中，如图10至图13所示，第一极耳21在电芯2的厚度方向上的投影(即该投影垂直于电芯2的厚度方向)位于第三绝缘层83的第二部分在电芯2的厚度方向上的投影内，第一极耳21在电芯2的厚度方向上的投影位于第三绝缘层83的第三部分在 电芯2的厚度方向上的投影内，第一极耳21在电芯2的长度方向上的投影(即该投影垂直于电芯2的长度方向)位于第三绝缘层83的第一部分在电芯2的长度方向上的投影内，即第三绝缘层83完全覆盖第一极耳21以及第一中间件与第一极耳21相接的部分。其中，第二部分至第一极耳21的方向、第三部分至第一极耳21的方向、第二部分至第三部分的方向、电芯2的厚度方向可以平行，第一部分至第一极耳21的方向与电芯2的长度方向平行。In some embodiments, as shown in FIGS. 10 to 13 , the projection of the first tab 21 in the thickness direction of the battery core 2 (that is, the projection is perpendicular to the thickness direction of the battery core 2 ) is located on the third insulating layer 83 The projection of the second part in the thickness direction of the battery core 2 is within the projection of the first tab 21 in the thickness direction of the battery core 2 and is located at the third part of the third insulating layer 83 . Within the projection in the thickness direction of the battery core 2, the projection of the first tab 21 in the length direction of the battery core 2 (that is, the projection is perpendicular to the length direction of the battery core 2) is located in the first part of the third insulating layer 83 in the electric core 2. In the projection along the length direction of the core 2 , that is, the third insulating layer 83 completely covers the first tab 21 and the portion where the first intermediate piece is connected to the first tab 21 . Among them, the direction from the second part to the first tab 21, the direction from the third part to the first tab 21, the direction from the second part to the third part, and the thickness direction of the battery core 2 can be parallel, and the direction from the first part to the first The direction of the tabs 21 is parallel to the length direction of the battery core 2 .
在一些优选实施例中，如图12所示，第三绝缘层83的第二部分延伸至电芯2的第一面并与位于电芯2的第一面的电极片(靠近壳体1的电极片)粘接，第三绝缘层83的第三部分延伸至电芯2的第二面并与位于电芯2的第二面的的电极片(靠近壳体1的电极片)粘接，由此，第三绝缘层83包裹在电芯2的侧面，可以进一步提高电芯2的稳定性。In some preferred embodiments, as shown in FIG. 12 , the second part of the third insulating layer 83 extends to the first side of the battery core 2 and is in contact with the electrode sheet located on the first side of the battery core 2 (near the side of the housing 1 The electrode sheet) is bonded, and the third part of the third insulating layer 83 extends to the second surface of the battery core 2 and is bonded to the electrode sheet (the electrode sheet close to the housing 1) located on the second surface of the battery core 2, As a result, the third insulating layer 83 wraps around the side of the battery core 2 , which can further improve the stability of the battery core 2 .
如图8、图11和图12所示，第一承接件31与电芯2之间还可以设有第二绝缘层82，以避免第一承接件31与电芯2中极性相反的电极片接触短路。具体地，当第一承接件31具有第二连接片52时，第二绝缘层82位于第一中间件的第二连接片52与电芯2之间。As shown in Figures 8, 11 and 12, a second insulating layer 82 can also be provided between the first receiving member 31 and the battery core 2 to prevent the first receiving member 31 from having opposite polarity electrodes in the battery core 2. Chip contact short circuit. Specifically, when the first receiving member 31 has the second connecting piece 52 , the second insulating layer 82 is located between the second connecting piece 52 of the first intermediate member and the battery core 2 .
在一些实施例中，如图8和图12所示，第二绝缘层82延伸至电芯2的第一面并与位于电芯2的第一面的电极片粘接，第二绝缘层82延伸至电芯2的第二面并与位于电芯2的第二面的电极片粘接，这样，第二绝缘层82包裹在电芯2的侧面，还能够固定电芯2，提高电芯2的稳定性。In some embodiments, as shown in FIGS. 8 and 12 , the second insulating layer 82 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 . The second insulating layer 82 Extends to the second surface of the battery core 2 and is bonded to the electrode sheet located on the second surface of the battery core 2. In this way, the second insulating layer 82 wraps around the side of the battery core 2, and can also fix the battery core 2 and improve the battery core. 2 stability.
在一些实施例中，电芯2包括多个层叠设置的电极片，电极片包括第一电极片，第一电极片包括第一集流体，第一极耳21设置在第一集流体上；沿第一承接件31至电芯2的方向，第一承接件31与第一集流体之间的距离小于1毫米，即第一承接件31与第一集流体在从第一承接件31至电芯2的方向上的距离小于1毫米，从而进一步缩短第一承接件31和第一极耳21所占用的空间，提高腔体的空间利用率，扩大电极片的占用面积，增强电芯的能量密度。In some embodiments, the battery core 2 includes a plurality of stacked electrode sheets, the electrode sheets include a first electrode sheet, the first electrode sheet includes a first current collector, and the first tab 21 is disposed on the first current collector; along In the direction from the first receiving member 31 to the battery core 2, the distance between the first receiving member 31 and the first current collector is less than 1 mm. That is, the distance between the first receiving member 31 and the first current collector is from the first receiving member 31 to the battery core 2. The distance in the direction of the core 2 is less than 1 mm, thereby further shortening the space occupied by the first receiving member 31 and the first tab 21, improving the space utilization of the cavity, expanding the occupied area of the electrode sheet, and enhancing the energy of the battery core. density.
电芯2还设有第二极耳22，第二极耳22与第一极耳21的极性相反；电池还包括第二承接件32，第二承接件32与第二极耳22电连接，第二承接件32设置在第一侧板11与电芯2之间，第二承接件32在第一侧板11上的投影与第二极耳22在第一侧板11上的投影不重叠(即第二承接件32平行于在第一侧板11的延伸方向的投影与第二极耳22平行于第一侧板11的延伸方向的投影不重叠)。The battery core 2 is also provided with a second tab 22, and the polarity of the second tab 22 is opposite to that of the first tab 21; the battery also includes a second receiving member 32, and the second receiving member 32 is electrically connected to the second tab 22. , the second receiving member 32 is disposed between the first side plate 11 and the battery core 2 , and the projection of the second receiving member 32 on the first side plate 11 is different from the projection of the second tab 22 on the first side plate 11 . overlap (that is, the projection of the second receiving member 32 parallel to the extension direction of the first side plate 11 does not overlap with the projection of the second tab 22 parallel to the extension direction of the first side plate 11 ).
由此，第二极耳22和第二承接件32不沿电芯2至第一侧板11的方向分布，具体来说，在沿第一侧板11至电芯2的方向上，第一侧板11至电芯2的距离为a1，第二极耳22与电芯2相接的一侧至第二极耳22背离电芯2的一侧(即面向第一侧板11的一侧)的距离为b2，第二承接件32面向电芯2的一侧(即背离第一侧板11的一侧)至第二承接件32面向第一侧板11的一侧(即第二承接件32在沿第一侧板11至电芯2的方向上的长度)为c2，a1＜b2+c2，由此，可以进一步节约腔体空间，提高电池的能量密度等性能。Therefore, the second tab 22 and the second receiving member 32 are not distributed along the direction from the battery core 2 to the first side plate 11. Specifically, in the direction from the first side plate 11 to the battery core 2, the first The distance from the side plate 11 to the battery core 2 is a 1 , from the side of the second tab 22 connecting with the battery core 2 to the side of the second tab 22 away from the battery core 2 (that is, the side facing the first side plate 11 side) is b 2 , from the side of the second receiving member 32 facing the battery core 2 (that is, the side away from the first side plate 11 ) to the side of the second receiving member 32 facing the first side plate 11 (that is, the side of the second receiving member 32 facing the first side plate 11 ). The length of the second receiving member 32 in the direction from the first side plate 11 to the battery core 2 is c 2 , a 1 < b 2 + c 2 , thereby further saving the cavity space and improving the energy density of the battery. performance.
其中，b2与b1可以相等或不等，c2与c1可以相等或不等。 Among them, b 2 and b 1 may be equal or unequal, and c 2 and c 1 may be equal or unequal.
具体地，第一极耳21、第二极耳22、第一承接件31、第二承接件32在第一侧板上的投影均不互相重叠。Specifically, the projections of the first pole tab 21 , the second pole tab 22 , the first receiving member 31 , and the second receiving member 32 on the first side plate do not overlap with each other.
如图11至图13所示，第二承接件32在第二侧板12上的投影与第二极耳22在第二侧板12上的投影至少部分重叠(即第二承接件32垂直于第一侧板11的延伸方向的投影与第二极耳22垂直于第一侧板11的延伸方向的投影至少部分重叠)，也就是说，第二承接件32和第二极耳22沿第一侧板的延伸方向排布，具体可以在电芯的宽度方向上排布，由此，便于第二承接件32与第二极耳22的连接，进一步节约腔体空间，提高电池的能量密度等性能。As shown in FIGS. 11 to 13 , the projection of the second receiving member 32 on the second side plate 12 at least partially overlaps with the projection of the second tab 22 on the second side plate 12 (that is, the second receiving member 32 is perpendicular to The projection of the extension direction of the first side plate 11 at least partially overlaps with the projection of the second pole tab 22 perpendicular to the extension direction of the first side plate 11 ), that is to say, the second receiving member 32 and the second pole tab 22 extend along the first side panel 11 . The extension direction of one side plate can be arranged in the width direction of the battery core, thereby facilitating the connection between the second receiving member 32 and the second tab 22, further saving the cavity space, and improving the energy density of the battery. etc. performance.
此外，第一极耳21在第二侧板12上的投影与第二极耳22在第二侧板12上的投影至少部分重叠(即第一极耳21垂直于第一侧板11的延伸方向的投影与第二极耳22垂直于第一侧板11的延伸方向的投影至少部分重叠)。第一承接件31在第二侧板12上的投影与第二承接件32在第二侧板12上的投影至少部分重叠。In addition, the projection of the first pole 21 on the second side plate 12 at least partially overlaps with the projection of the second pole 22 on the second side plate 12 (that is, the extension of the first pole 21 perpendicular to the first side plate 11 The projection of the second tab 22 perpendicular to the extension direction of the first side plate 11 at least partially overlaps). The projection of the first receiving member 31 on the second side panel 12 and the projection of the second receiving member 32 on the second side panel 12 at least partially overlap.
具体地，如图11至图13所示，第一极耳21垂直于电芯2的宽度方向的投影与第二极耳22垂直于电芯2的宽度方向的投影至少部分重叠，第二承接件32垂直于电芯2的宽度方向的投影与第二极耳22垂直于电芯2的宽度方向的投影至少部分重叠。Specifically, as shown in FIGS. 11 to 13 , the projection of the first tab 21 perpendicular to the width direction of the battery core 2 at least partially overlaps with the projection of the second tab 22 perpendicular to the width direction of the battery core 2 , and the second contact The projection of the member 32 perpendicular to the width direction of the battery core 2 at least partially overlaps with the projection of the second tab 22 perpendicular to the width direction of the battery core 2 .
此外，第一极耳21和第二极耳22可以位于第一承接件31和第二承接件32之间，从而充分利用第一承接件31和第二承接件32之间的空间，进一步扩大电芯2的电极片在长度方向上的尺寸，以提高电芯的能量密度。例如在平行于从第一承接件31至第一极耳21的方向上，第一极耳21和第二极耳22位于第一承接件31和第二承接件32之间，即第一承接件31、第一极耳21、第二极耳22、第二承接件32可以依次排布，例如，第一承接件31、第一极耳21、第二极耳22、第二承接件32可以在电芯2的宽度方向上依次排布，第一承接件31、第一极耳21、第二极耳22、第二承接件32可以基本同轴设置。In addition, the first pole tab 21 and the second pole tab 22 can be located between the first receiving member 31 and the second receiving member 32, thereby making full use of the space between the first receiving member 31 and the second receiving member 32 to further expand the The size of the electrode sheet of the battery core 2 in the length direction is to increase the energy density of the battery core. For example, in the direction parallel to the first receiving member 31 to the first pole tab 21 , the first pole tab 21 and the second pole tab 22 are located between the first receiving member 31 and the second receiving member 32 , that is, the first receiving member 31 The member 31, the first pole tab 21, the second pole tab 22, and the second receiving member 32 can be arranged in sequence. For example, the first receiving member 31, the first pole tab 21, the second pole tab 22, and the second receiving member 32 They may be arranged sequentially in the width direction of the battery core 2 , and the first receiving member 31 , the first pole tab 21 , the second pole tab 22 , and the second receiving member 32 may be arranged substantially coaxially.
但不局限于此，在另一些实施例中，也可以是第一承接件31和第二承接件32位于第一极耳21和第二极耳22之间。But it is not limited to this. In other embodiments, the first receiving member 31 and the second receiving member 32 may be located between the first pole tab 21 and the second pole tab 22 .
此外，第一承接件31、第一极耳21、第二极耳22、第二承接件32一般不伸出电芯2端面(电芯2面向第一侧板11的端面)的外缘，在电芯2的厚度方向或宽度方向上均不伸出电芯2的外缘，即电芯2在第一侧板11上的投影覆盖第一承接件31在第一侧板11上的投影，电芯2在第一侧板11上的投影覆盖第一极耳21在第一侧板11上的投影，电芯2在第一侧板11上的投影覆盖第二极耳22在第一侧板11上的投影，电芯2在第一侧板11上的投影覆盖第二承接件32在第一侧板11上的投影。In addition, the first receiving member 31, the first pole tab 21, the second pole tab 22, and the second receiving member 32 generally do not protrude from the outer edge of the end surface of the battery core 2 (the end surface of the battery core 2 facing the first side plate 11). The outer edge of the battery core 2 does not protrude in either the thickness direction or the width direction, that is, the projection of the battery core 2 on the first side plate 11 covers the projection of the first receiving member 31 on the first side plate 11 , the projection of the battery core 2 on the first side plate 11 covers the projection of the first tab 21 on the first side plate 11 , and the projection of the battery core 2 on the first side plate 11 covers the projection of the second tab 22 on the first side plate 11 . The projection of the battery core 2 on the first side plate 11 covers the projection of the second receiving member 32 on the first side plate 11 .
在一些实施例中，第二极耳22背离电芯2的一侧至第二极耳22与电芯2相接的一侧的距离不大于第二承接件32在沿第一侧板11至第二极耳22的方向的长度，利于进一步提高电池的能量密度等性能。In some embodiments, the distance from the side of the second tab 22 away from the battery core 2 to the side of the second tab 22 connecting with the battery core 2 is no greater than the distance between the second receiving member 32 and the distance along the first side plate 11 to The length in the direction of the second tab 22 is conducive to further improving the energy density and other performance of the battery.
具体地，第二承接件32可以是块状(或称第二转接块)，其厚度方向可以平行于从第一侧板11至第二极耳22的方向，即第二承接件32在沿第一侧板11至第二极耳22的 方向的长度即为第二承接件32的厚度。Specifically, the second receiving member 32 may be in the shape of a block (or called a second adapter block), and its thickness direction may be parallel to the direction from the first side plate 11 to the second tab 22 , that is, the second receiving member 32 is in the shape of a block. along the first side plate 11 to the second tab 22 The length in the direction is the thickness of the second receiving member 32 .
一般情况下，第一侧板11至第一极耳21的方向、第一侧板11至第二极耳22的方向、第一侧板11至电芯2的方向平行。Generally, the direction from the first side plate 11 to the first tab 21 , the direction from the first side plate 11 to the second tab 22 , and the direction from the first side plate 11 to the battery core 2 are parallel.
在一些实施例中，第二承接件32在沿第一侧板11至第二极耳22的方向的长度c2为1mm-4mm，例如1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm等。In some embodiments, the length c 2 of the second receiving member 32 in the direction from the first side plate 11 to the second tab 22 is 1 mm to 4 mm, such as 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm. , 4mm, etc.
具体来说，c2可以大于、等于或小于c1，优选c2≥c1，进一步优选c2＞c1。具体来说，当第一极耳21与壳体1绝缘连接时，第一承接件31与第一侧板11之间设有第二绝缘片7，而第二承接件32可以与第一侧板11焊接，此时c2＞c1，二者之差(L2-L1)可以基本等于第二绝缘片7的厚度；当第一极耳21与壳体1电连接，而第二极耳22与壳体1绝缘连接时，第一承接件31与第一侧板11之间可以不设置第二绝缘片7，二者直接接触，而在第二承接件32与第一侧板11之间可以设置第二绝缘片7(第二承接件32与壳体1的连接结构可以类似于第一承接件31与壳体1通过极柱42连接的连接结构，不再赘述)，此时c2＜c1，二者厚度之差(c1-c2)可以基本等于第二绝缘片7的厚度；当第一极耳21和第二极耳22均与壳体1绝缘连接时，第一承接件31与第一侧板11之间、第二承接件32与第一侧板11之间均分别设置第二绝缘片7(第二承接件32与壳体1的连接结构可以类似于第一承接件31与壳体1通过极柱42连接的连接结构，不再赘述)，此时c2＝c1。由此，可以进一步节约腔体空间，提高电池的能量密度等性能。Specifically, c 2 may be greater than, equal to, or less than c 1 , preferably c 2 ≥ c 1 , and further preferably c 2 >c 1 . Specifically, when the first tab 21 is insulatedly connected to the housing 1, the second insulating sheet 7 is provided between the first receiving member 31 and the first side plate 11, and the second receiving member 32 can be connected with the first side plate 11. The plate 11 is welded. At this time, c 2 > c 1 , the difference between the two (L 2 -L 1 ) can be basically equal to the thickness of the second insulating sheet 7; when the first tab 21 is electrically connected to the housing 1, and the second When the pole tab 22 is insulatedly connected to the housing 1, the second insulating sheet 7 does not need to be provided between the first receiving member 31 and the first side plate 11, and the two are in direct contact, and between the second receiving member 32 and the first side plate A second insulating sheet 7 can be provided between 11 (the connection structure of the second receiving member 32 and the housing 1 can be similar to the connection structure of the first receiving member 31 and the housing 1 through the pole 42, which will not be described again). When c 2 <c 1 , the difference in thickness (c 1 - c 2 ) between the two can be substantially equal to the thickness of the second insulating sheet 7 ; when both the first tab 21 and the second tab 22 are insulatedly connected to the housing 1 , the second insulating sheet 7 is respectively provided between the first receiving member 31 and the first side plate 11 and between the second receiving member 32 and the first side plate 11 (the connection structure of the second receiving member 32 and the housing 1 can be Similar to the connection structure in which the first receiving member 31 and the housing 1 are connected through the pole 42 (no further details will be given), at this time c 2 =c 1 . As a result, the cavity space can be further saved and the energy density and other performance of the battery can be improved.
第二极耳22与壳体1可以电连接，即壳体1、第二承接件32、第二极耳22电连接，第二承接件32可以分别与第二极耳22、壳体1焊接，具体可以与壳体1的第一侧板11焊接。The second tab 22 can be electrically connected to the housing 1, that is, the housing 1, the second receiving member 32, and the second tab 22 are electrically connected. The second receiving member 32 can be welded to the second tab 22 and the housing 1 respectively. , specifically it can be welded to the first side plate 11 of the housing 1 .
上述电池还可以包括位于电芯2与第一侧板11之间的第二中间件，第二中间件分别与第二极耳22和第二承接件32连接(即第二承接件32通过第二中间件与第二极耳22连接)，具体可以是第二承接件32、第二中间件、第二极耳22依次焊接。The above-mentioned battery may also include a second middle piece located between the battery core 2 and the first side plate 11. The second middle piece is connected to the second tab 22 and the second receiving member 32 respectively (that is, the second receiving member 32 passes through the second receiving member 32). The second middle piece is connected to the second tab 22), specifically, the second receiving piece 32, the second middle piece, and the second tab 22 can be welded in sequence.
具体地，第二中间件可以包括与第二承接件32连接的第五连接片55、与第二极耳22的背离电芯2的一侧相接的第八连接片58。如图8至图12所示，第二中间件可以具有弯折结构，第五连接片55与第二承接件32相接，第八连接片58与第二极耳22相接，具体可以是焊接，第二承接件32与第五连接片55相接的一面和第八连接片58与第二极耳22相接的一面之间形成有第二夹角，第二夹角的范围为80-140°，例如80°、90°、100°、120°、130°、140°等，即二者不平行，例如垂直，由此，可以进一步提高第二承接件32通过第二中间件与第二极耳22连接的稳定性，进而提高电池的稳定性、安全性和使用寿命等品质。Specifically, the second middle piece may include a fifth connecting piece 55 connected to the second receiving member 32 and an eighth connecting piece 58 connected to a side of the second tab 22 away from the battery core 2 . As shown in FIGS. 8 to 12 , the second middle piece may have a bent structure, the fifth connecting piece 55 is connected to the second receiving member 32 , and the eighth connecting piece 58 is connected to the second tab 22 . Specifically, it may be: Welding, a second included angle is formed between the side of the second receiving member 32 that connects to the fifth connecting piece 55 and the side that connects the eighth connecting piece 58 to the second tab 22 , and the range of the second included angle is 80 -140°, such as 80°, 90°, 100°, 120°, 130°, 140°, etc., that is, the two are not parallel, such as perpendicular. Therefore, the connection between the second receiving part 32 and the second intermediate part can be further improved. The stability of the connection of the second tab 22 thereby improves the stability, safety, service life and other qualities of the battery.
此外，第二承接件32与第五连接片55相接的一面和第二承接件32面向第一侧板11的一面之间形成有第四夹角，第四夹角的范围为80-140°，例如80°、90°、100°、120°、130°、140°等，即二者不平行，例如可以垂直。In addition, a fourth included angle is formed between the side of the second receiving member 32 that is in contact with the fifth connecting piece 55 and the side of the second receiving member 32 facing the first side plate 11 , and the range of the fourth included angle is 80-140. °, such as 80°, 90°, 100°, 120°, 130°, 140°, etc., that is, the two are not parallel, for example, they can be perpendicular.
此外，电芯2包括多个层叠设置的电极片，第五连接片55与第二承接件32相接的一 面和电极片的表面平行。In addition, the battery core 2 includes a plurality of stacked electrode sheets, and the fifth connecting sheet 55 is connected to the second receiving member 32 . The surface is parallel to the surface of the electrode sheet.
在一些实施例中，如图8所示，第二中间件还包括分别与第五连接片55和第八连接片58连接起来的第二连接组件，第二连接组件包括第六连接片56和第七连接片57，第六连接片56位于第二承接件32与电芯2之间；在从第二承接件32至第二极耳22的方向上，第七连接片57位于第二承接件32和第二极耳22之间；第五连接片55、第六连接片56、第七连接片57、第八连接片58依次相连。In some embodiments, as shown in FIG. 8 , the second middleware further includes a second connecting component connected to the fifth connecting piece 55 and the eighth connecting piece 58 respectively. The second connecting component includes a sixth connecting piece 56 and a sixth connecting piece 56 . The seventh connecting piece 57 and the sixth connecting piece 56 are located between the second receiving member 32 and the battery core 2; in the direction from the second receiving member 32 to the second tab 22, the seventh connecting piece 57 is located between the second receiving member 32 and the battery core 2. Between the component 32 and the second tab 22; the fifth connecting piece 55, the sixth connecting piece 56, the seventh connecting piece 57, and the eighth connecting piece 58 are connected in sequence.
具体地，第二中间件具有多重弯折结构，其第五连接片55依次通过第六连接片56和第七连接片57与第八连接片58相接，第五连接片55的表面与第六连接片56的表面不平行，例如垂直，第六连接片56的表面与第七连接片57的表面不平行，可以垂直或不垂直，第八连接片58的表面与第六连接片56的表面可以平行，由此，可以进一步提高第二承接件32与第二极耳22连接的稳定性。Specifically, the second middle piece has a multiple bending structure, and its fifth connecting piece 55 is connected to the eighth connecting piece 58 through the sixth connecting piece 56 and the seventh connecting piece 57 in sequence, and the surface of the fifth connecting piece 55 is connected to the eighth connecting piece 58 . The surfaces of the six connecting pieces 56 are not parallel, for example, perpendicular. The surfaces of the sixth connecting piece 56 and the seventh connecting piece 57 are not parallel, and may be perpendicular or non-perpendicular. The surfaces of the eighth connecting piece 58 and the surfaces of the sixth connecting piece 56 are not parallel. The surfaces may be parallel, thereby further improving the stability of the connection between the second receiving member 32 and the second tab 22 .
在另一些实施例中，如图9至图12所示，第五连接片55包括与第二承接件32相接的第三连接部551、以及沿第一侧板11的延伸方向(如从第二承接件32至第二极耳22的方向)延伸的第四连接部552，第四连接部552与第八连接片58相连。其中，第三连接部551与第四连接部552位于第二承接件32的同一侧，亦位于第二极耳22的同一侧，第三连接部551具体可以位于第二承接件32背离第六侧板16的一侧，第四连接部552具体可以位于第二极耳22背离第六侧板16的一侧，第四连接部552面向第二极耳22的一面和第八连接片58与第二极耳22相接的一面不平行，例如垂直。In other embodiments, as shown in FIGS. 9 to 12 , the fifth connecting piece 55 includes a third connecting portion 551 connected with the second receiving member 32 , and an extension direction along the first side plate 11 (such as from The fourth connecting portion 552 extends from the second receiving member 32 to the direction of the second pole lug 22 . The fourth connecting portion 552 is connected to the eighth connecting piece 58 . The third connecting portion 551 and the fourth connecting portion 552 are located on the same side of the second receiving member 32 and on the same side of the second pole lug 22 . Specifically, the third connecting portion 551 can be located on the second receiving member 32 away from the sixth connecting member 32 . On one side of the side plate 16, the fourth connecting portion 552 can be specifically located on the side of the second tab 22 facing away from the sixth side plate 16. The fourth connecting portion 552 faces the side of the second tab 22 and the eighth connecting piece 58. The connecting surfaces of the second pole tabs 22 are not parallel, for example, vertical.
具体地，第三连接部551与第四连接部552可以一体成型，形成第五连接片55，第三连接部551与第四连接部552的表面可以齐平，即第五连接片55可以是直型结构，而没有较大程度的弯折，但不局限于此。第五连接片55的表面与第八连接片58的表面不平行，例如垂直，即第五连接片55与第二承接件32相接的一面和第八连接片58与第二极耳22相接的一面不平行，例如垂直。Specifically, the third connecting part 551 and the fourth connecting part 552 can be integrally formed to form the fifth connecting piece 55. The surfaces of the third connecting part 551 and the fourth connecting part 552 can be flush, that is, the fifth connecting piece 55 can be A straight structure without a large degree of bending, but is not limited to this. The surface of the fifth connecting piece 55 and the surface of the eighth connecting piece 58 are not parallel, for example, perpendicular. That is, the surface of the fifth connecting piece 55 and the second receiving member 32 is in contact with the eighth connecting piece 58 and the second tab 22 . The connected sides are not parallel, such as vertical.
此外，第五连接片55与第二承接件32可以是焊接，并在第五连接片55背离第二承接件32的一侧形成有焊印。其中，当第五连接片55包括第三连接部551和第四连接部552时，第三连接部551与第二承接件32可以是焊接，并在第三连接部551背离第二承接件32的一侧形成有焊印。In addition, the fifth connecting piece 55 and the second receiving member 32 may be welded, and a welding mark is formed on the side of the fifth connecting piece 55 away from the second receiving member 32 . Wherein, when the fifth connecting piece 55 includes the third connecting part 551 and the fourth connecting part 552, the third connecting part 551 and the second receiving part 32 may be welded, and the third connecting part 551 is away from the second receiving part 32 A solder mark is formed on one side of the
此外，第五连接片55(或第五连接片55的第三连接部551)背离第二承接件32的一侧还设有第六绝缘层86，如图13所示，第六绝缘层86可以是从第一连接片51延伸至第五连接片55，具体可以从第一连接片51背离第五连接片55的一端延伸至第五连接片55背离第一连接片51的一端，覆盖第一连接片51和第五连接片55。In addition, a sixth insulating layer 86 is provided on the side of the fifth connecting piece 55 (or the third connecting portion 551 of the fifth connecting piece 55 ) away from the second receiving member 32 . As shown in FIG. 13 , the sixth insulating layer 86 It may extend from the first connecting piece 51 to the fifth connecting piece 55. Specifically, it may extend from an end of the first connecting piece 51 facing away from the fifth connecting piece 55 to an end of the fifth connecting piece 55 facing away from the first connecting piece 51, covering the first connecting piece 51. A connecting piece 51 and a fifth connecting piece 55 .
此外，如图10至图13所示，还可以包括第四绝缘层84，第四绝缘层84位于第二中间件和第一侧板11之间。具体地，第四绝缘层84可以包括位于第八连接片58背离第二极耳22的一面的第四部分。In addition, as shown in FIGS. 10 to 13 , a fourth insulating layer 84 may also be included, and the fourth insulating layer 84 is located between the second middle piece and the first side plate 11 . Specifically, the fourth insulating layer 84 may include a fourth portion located on a side of the eighth connecting piece 58 facing away from the second tab 22 .
在一些实施例中，第四绝缘层84还包括自第四部分靠近电芯2的第一面的一端向靠 近电芯2的方向延伸形成的第五部分以及自第四部分靠近电芯2的第二面的一端向靠近电芯2的方向延伸形成的第六部分。In some embodiments, the fourth insulating layer 84 further includes an end of the fourth portion close to the first surface of the battery core 2 . A fifth part extends in a direction close to the battery core 2 and a sixth part extends in a direction close to the battery core 2 from an end of the fourth part close to the second surface of the battery core 2 .
如图10至图13所示，第四绝缘层84的第五部分、第四部分和第六部分依次相连，并围设成第二凹槽，第二凹槽的底壁为第四绝缘层84的第四部分，侧壁分别为第四绝缘层84的第五部分和第六部分，第二极耳22、以及第二中间件与第二极耳22相接的部分(如第八连接片58、第五连接片55位于第二极耳22侧面的第四连接部552)位于第二凹槽内，被第四绝缘层84覆盖，由此，可进一步提高电池的稳定性和安全性等性能。As shown in FIGS. 10 to 13 , the fifth part, the fourth part and the sixth part of the fourth insulating layer 84 are connected in sequence and surrounded by a second groove. The bottom wall of the second groove is the fourth insulating layer. The fourth part and side walls of 84 are respectively the fifth part and the sixth part of the fourth insulating layer 84, the second tab 22, and the part where the second middle piece is connected to the second tab 22 (such as the eighth connection The fourth connecting portion 552) of the piece 58 and the fifth connecting piece 55 located on the side of the second tab 22 is located in the second groove and covered by the fourth insulating layer 84, thereby further improving the stability and safety of the battery. etc. performance.
具体来说，第二极耳22具有相对的第一侧面和第二侧面，第二极耳22的第一侧面与第二极耳22的第二侧面分别位于第二极耳22与第八连接片58相接的一面的相对两侧。当第二中间件的第五连接片55和第八连接片58通过第二连接组件(即第六连接片56和第七连接片57)连接时(如图8所示)，第四绝缘层84包括位于第八连接片58背离第二极耳22的一面的第四部分、位于第二极耳22的第一侧面的第五部分、位于第二极耳22的第二侧面的第六部分；当第二中间件的第五连接片55包括第三连接部551和第四连接部552时(如图9至图12所示)，第四连接部552延伸至第二极耳22的第一侧面，第四绝缘层84包括位于第八连接片58背离第二极耳22的一面的第四部分、位于第四连接部552背离第二极耳22的一面的第五部分、位于第二极耳22背离第四连接部552的一面(第二侧面)的第六部分。Specifically, the second tab 22 has an opposite first side and a second side. The first side of the second tab 22 and the second side of the second tab 22 are respectively located between the second tab 22 and the eighth connection. Opposite sides of the side where the pieces 58 meet. When the fifth connecting piece 55 and the eighth connecting piece 58 of the second middle piece are connected through the second connecting component (ie, the sixth connecting piece 56 and the seventh connecting piece 57) (as shown in Figure 8), the fourth insulating layer 84 includes a fourth portion located on the side of the eighth connecting piece 58 facing away from the second tab 22, a fifth portion located on the first side of the second tab 22, and a sixth portion located on the second side of the second tab 22. ; When the fifth connecting piece 55 of the second middle piece includes a third connecting portion 551 and a fourth connecting portion 552 (as shown in FIGS. 9 to 12 ), the fourth connecting portion 552 extends to the third connecting portion of the second tab 22 . On one side, the fourth insulating layer 84 includes a fourth portion located on a side of the eighth connecting piece 58 facing away from the second tab 22 , a fifth portion located on a side of the fourth connecting portion 552 facing away from the second tab 22 , and a fifth portion located on a side of the fourth connecting portion 552 facing away from the second tab 22 . The sixth part of the side (second side) of the tab 22 that is away from the fourth connecting portion 552 .
在一些实施例中，如图10至图13所示，第二极耳22在电芯2的厚度方向上的投影位于第四绝缘层84的第五部分在电芯2的厚度方向上的投影内，第二极耳22在电芯2的厚度方向上的投影位于第四绝缘层84的第六部分在电芯2的厚度方向上的投影内，第二极耳22在电芯2的长度方向上的投影位于第四绝缘层84的第四部分在电芯2的长度方向上的投影内，即第四绝缘层84完全覆盖第二极耳22以及第二中间件与第二极耳22相接的部分。其中，第五部分至第二极耳22的方向、第六部分至第二极耳22的方向、第五部分至第六部分的方向、电芯2的厚度方向可以平行，第四部分至第二极耳22的方向与电芯2的长度方向平行。In some embodiments, as shown in FIGS. 10 to 13 , the projection of the second tab 22 in the thickness direction of the battery core 2 is located at the projection of the fifth part of the fourth insulating layer 84 in the thickness direction of the battery core 2 , the projection of the second tab 22 in the thickness direction of the battery core 2 is located within the projection of the sixth part of the fourth insulating layer 84 in the thickness direction of the battery core 2 , and the second tab 22 is within the length of the battery core 2 The projection in the direction is located within the projection of the fourth part of the fourth insulating layer 84 in the length direction of the battery core 2 , that is, the fourth insulating layer 84 completely covers the second tab 22 and the second middle member and the second tab 22 connected parts. Among them, the direction from the fifth part to the second tab 22, the direction from the sixth part to the second tab 22, the direction from the fifth part to the sixth part, and the thickness direction of the battery core 2 can be parallel, and the direction from the fourth part to the second tab 22 can be parallel. The direction of the diode tabs 22 is parallel to the length direction of the battery core 2 .
在一些优选实施例中，如图12所示，第四绝缘层84的第五部分延伸至电芯2的第一面并与位于电芯2的第一面的电极片粘接，第四绝缘层84的第六部分延伸至电芯2的第二面并与位于电芯2的第二面的电极片粘接，由此，第四绝缘层84包裹在电芯2的侧面，可以进一步提高电芯2的稳定性。In some preferred embodiments, as shown in FIG. 12 , the fifth part of the fourth insulating layer 84 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 . The sixth part of the layer 84 extends to the second surface of the battery core 2 and is bonded to the electrode sheet located on the second surface of the battery core 2. Therefore, the fourth insulating layer 84 wraps around the side of the battery core 2, which can further improve the performance of the battery core 2. The stability of cell 2.
如图8、图11和图12所示，第二承接件32与电芯2之间还可以设有第五绝缘层85，以避免第二承接件32与电芯2中极性相反的电极片接触短路。具体地，当第二承接件32具有第六连接片56时，第五绝缘层85位于第二中间件的第六连接片56与电芯2之间。As shown in FIGS. 8 , 11 and 12 , a fifth insulating layer 85 may be disposed between the second receiving member 32 and the battery core 2 to prevent the second receiving member 32 from contacting the opposite polarity electrodes in the battery core 2 . Chip contact short circuit. Specifically, when the second receiving member 32 has the sixth connecting piece 56 , the fifth insulating layer 85 is located between the sixth connecting piece 56 of the second intermediate member and the battery core 2 .
在一些实施例中，如图8和图12所示，第五绝缘层85延伸至电芯2的第一面并与位于电芯2的第一面的电极片粘接，第五绝缘层85延伸至电芯2的第二面并与位于电芯2的第二面的电极片粘接，这样，第五绝缘层85包裹在电芯2的侧面，还能够固定电芯2， 提高电芯2的稳定性。In some embodiments, as shown in FIGS. 8 and 12 , the fifth insulating layer 85 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 . The fifth insulating layer 85 Extends to the second surface of the battery core 2 and is bonded to the electrode sheet located on the second surface of the battery core 2. In this way, the fifth insulating layer 85 wraps around the side of the battery core 2 and can also fix the battery core 2. Improve the stability of battery core 2.
在一些实施例中，电芯2包括多个层叠设置的电极片，电极片包括第二电极片，第二电极片包括第二集流体，第二极耳22设置在第二集流体上；沿第二承接件32至电芯2的方向，第二承接件32与第二集流体之间的距离小于1毫米，即第二承接件32与第二集流体在沿第二承接件32至电芯2的方向上的距离小于1毫米。In some embodiments, the battery core 2 includes a plurality of stacked electrode sheets, the electrode sheets include a second electrode sheet, the second electrode sheet includes a second current collector, and the second tab 22 is disposed on the second current collector; along In the direction from the second receiving member 32 to the battery core 2, the distance between the second receiving member 32 and the second current collector is less than 1 mm, that is, the distance between the second receiving member 32 and the second current collector is along the direction from the second receiving member 32 to the battery core The distance in the direction of core 2 is less than 1 mm.
如图11和图12所示，电芯2具有位于电芯2的第一面和电芯2的第二面之间的侧面，在电芯2的至少一侧侧面的至少部分区域设有保护胶层9。As shown in Figures 11 and 12, the battery core 2 has a side surface located between the first surface of the battery core 2 and the second surface of the battery core 2, and at least a partial area of at least one side of the battery core 2 is provided with protection. Glue layer 9.
具体地，电芯2的侧面是露出电芯2中的电极片外缘的侧面，是由多个层叠设置的电极片垂直于其厚度方向的端面形成，即电芯2的侧面平行于电芯2的厚度方向(亦为电极片的厚度方向)。Specifically, the side of the battery core 2 is the side that exposes the outer edge of the electrode sheet in the battery core 2, and is formed by the end surfaces of a plurality of stacked electrode sheets perpendicular to the thickness direction thereof, that is, the side of the battery core 2 is parallel to the battery core. 2 thickness direction (also the thickness direction of the electrode sheet).
如图11和图12所示，电芯2的侧面包括依次相接的第一侧面、第二侧面、第三侧面、第四侧面，第一侧面是电芯2面向第一侧板11的端面(即电芯2设有第一极耳21和第二极耳22的一面)，第二侧面与第四侧面位于第一侧面(或第三侧面)的相对两侧，第一侧面与第三侧面位于第二侧面(或第四侧面)的相对两侧。其中，第一侧面与第三侧面可以相互平行，第二侧面与第四侧面可以相互平行，第一侧面(或第三侧面)与第二侧面(或第四侧面)可以相互垂直，第一侧面至第三侧面的方向可以为电芯2的长度方向，而第二侧面至第四侧面为电芯2的宽度方向，或者，第一侧面至第三侧面的方向也可以为电芯2的宽度方向，而第二侧面至第四侧面为电芯2的长度方向。As shown in Figures 11 and 12, the side surfaces of the battery core 2 include a first side, a second side, a third side, and a fourth side that are connected in sequence. The first side is the end surface of the battery core 2 facing the first side plate 11. (That is, the side of the battery core 2 provided with the first tab 21 and the second tab 22), the second side and the fourth side are located on opposite sides of the first side (or the third side), and the first side and the third side are The sides are located on opposite sides of the second side (or fourth side). Wherein, the first side and the third side can be parallel to each other, the second side and the fourth side can be parallel to each other, the first side (or third side) and the second side (or fourth side) can be perpendicular to each other, and the first side The direction to the third side may be the length direction of the battery core 2 , and the second side to the fourth side may be the width direction of the battery core 2 , or the direction from the first side to the third side may also be the width of the battery core 2 direction, and the second side to the fourth side are the length direction of the battery core 2 .
其中，第二侧面、第三侧面、第四侧面中的至少一者设有保护胶层9，即其中的一者或多者(如全部)设有保护胶层9，但不局限于此，第一侧面也可以设置保护胶层9。Wherein, at least one of the second side, the third side and the fourth side is provided with a protective glue layer 9, that is, one or more (such as all) of them is provided with a protective glue layer 9, but is not limited to this. A protective adhesive layer 9 can also be provided on the first side.
此外，电芯2的任意一个侧面的保护胶层9的数量可以是一个或多个，当任意一个侧面的保护胶层9的数量为1个时，该侧面的保护胶层9沿该侧面的长度方向的长度可以不大于该侧面的长度，例如基本相等；当任意一个侧面的保护胶层9的数量为多个时，该多个保护胶层9间隔设置在电芯2的该侧面，由此在任意两个相邻的保护胶层9之间存在间隙，通过该间隙利于电解液浸润到电芯中的极片中，进一步优化电池性能。In addition, the number of the protective glue layers 9 on any side of the battery core 2 may be one or more. When the number of the protective glue layers 9 on any one side is one, the protective glue layers 9 on the side along the The length in the longitudinal direction may not be greater than the length of the side, for example, substantially equal; when the number of protective glue layers 9 on any one side is multiple, the plurality of protective glue layers 9 are arranged at intervals on the side of the battery core 2, as follows: There is a gap between any two adjacent protective adhesive layers 9, and the gap facilitates the electrolyte to infiltrate into the pole pieces in the battery core, further optimizing the battery performance.
以第二侧面为例，当第二侧面的保护胶层9的数量为一个时，该保护胶层9在第二侧面的长度方向上的长度可以不大于第二侧面的长度，例如与第二侧面的长度基本相等；当第二侧面的保护胶层9的数量为多个时，该多个保护胶层9可以间隔分布在第二侧面。Taking the second side as an example, when the number of the protective glue layer 9 on the second side is one, the length of the protective glue layer 9 in the length direction of the second side may not be greater than the length of the second side, for example, the length of the second side. The lengths of the side surfaces are substantially equal; when there are multiple protective adhesive layers 9 on the second side, the multiple protective adhesive layers 9 can be distributed at intervals on the second side.
在一些实施例中，如图11和图12所示，保护胶层9延伸至电芯2的第一面并与位于电芯2的第一面的电极片粘结和/或延伸至电芯2的第二面并与位于电芯2的第二面的电极片粘接，由此，可以避免电芯2侧面露出的电极片与壳体1接触，同时可以固定电芯2，提高电池的安全性和稳定性等性能。In some embodiments, as shown in FIGS. 11 and 12 , the protective adhesive layer 9 extends to the first side of the battery core 2 and is bonded to the electrode sheet located on the first side of the battery core 2 and/or extends to the battery core. 2 and is bonded to the electrode sheet located on the second side of the battery core 2. This prevents the exposed electrode sheet from the side of the battery core 2 from contacting the casing 1. At the same time, the battery core 2 can be fixed and the battery performance is improved. performance such as security and stability.
此外，如图12所示，保护胶层9可以设有一个或多个第五通孔90，优选设有多个第五通孔90，该多个第五通孔90可以均匀或不均匀分布在保护胶层9与电芯的侧面相对的部分(保护胶层9的该部分叠放在电芯2的侧面(如第二侧面))，由此，通过第五通孔 90可以提高电解液对电芯2的浸润性，使电解液更好地浸润到电极片中，进一步优化电池性能。尤其当电芯2的任意一个侧面的保护胶层9的数量为一个时，该侧面的保护胶层9可以设有一个或多个第五通孔90。In addition, as shown in FIG. 12 , the protective adhesive layer 9 may be provided with one or more fifth through holes 90 , preferably multiple fifth through holes 90 , and the plurality of fifth through holes 90 may be evenly or unevenly distributed. In the part of the protective glue layer 9 opposite to the side of the battery core (this part of the protective glue layer 9 is stacked on the side of the battery core 2 (such as the second side)), through the fifth through hole 90 can improve the wettability of the electrolyte to the battery core 2, allowing the electrolyte to better infiltrate into the electrode sheet, further optimizing the battery performance. Especially when the number of protective adhesive layers 9 on any side of the battery core 2 is one, the protective adhesive layer 9 on this side may be provided with one or more fifth through holes 90 .
上述保护胶层9具体可以是胶纸，一般具有绝缘性和粘性，其可以是本领域常规胶纸，对此不作特别限制。The above-mentioned protective adhesive layer 9 can specifically be adhesive paper, which generally has insulation and viscosity. It can be conventional adhesive paper in this field, and is not particularly limited.
第一承接件31、第一极耳21、第二极耳22、第二承接件32位于电芯2面向第一侧板11的端面，电芯2的第一面和电芯2的第二面分别位于电芯2面向第一侧板11的端面的相对两侧，电芯2的第一面至电芯2的第二面的方向为电芯2的厚度方向(亦为电极片的厚度方向)，电芯2的第一面、电芯2的第二面与电极片的表面可以平行(与电极片的厚度方向垂直)，而与电芯2面向第一侧板11的端面可以垂直。The first receiving member 31, the first tab 21, the second tab 22, and the second receiving member 32 are located on the end surface of the battery core 2 facing the first side plate 11. The first surface of the battery core 2 and the second surface of the battery core 2 The surfaces are respectively located on opposite sides of the end surface of the battery core 2 facing the first side plate 11. The direction from the first surface of the battery core 2 to the second surface of the battery core 2 is the thickness direction of the battery core 2 (also the thickness of the electrode sheet). direction), the first surface of the battery core 2 and the second surface of the battery core 2 can be parallel to the surface of the electrode sheet (perpendicular to the thickness direction of the electrode sheet), and can be perpendicular to the end surface of the battery core 2 facing the first side plate 11 .
位于电芯2的第一面的电极片、位于电芯2的第二面的电极片分别是电芯2最外侧的电极片，即其余电极片层叠设置在位于电芯2的第一面的电极片与位于电芯2的第二面的电极片之间。位于电芯2的第一面的电极片与位于电芯2的第二面的电极片的极性可以相同或不同，可以为正极片或负极片，可以为第一电极片或第二电极片，通常优选位于电芯2的第一面的电极片与位于电芯2的第二面的电极片为负极片。The electrode sheets located on the first side of the battery core 2 and the electrode sheets located on the second side of the battery core 2 are respectively the outermost electrode sheets of the battery core 2 , that is, the remaining electrode sheets are stacked on the first side of the battery core 2 between the electrode sheet and the electrode sheet located on the second side of the battery core 2 . The polarity of the electrode sheet located on the first side of the battery core 2 and the polarity of the electrode sheet located on the second side of the battery core 2 may be the same or different. They may be positive electrode sheets or negative electrode sheets, and may be the first electrode sheet or the second electrode sheet. Generally, it is preferred that the electrode sheet located on the first side of the battery core 2 and the electrode sheet located on the second side of the battery core 2 are negative electrode sheets.
具体地，如图8至图12所示，电芯2包括多个层叠设置的电极片，该电极片包括第一电极片和第二电极片，二者之间被隔膜隔开，第一电极片与第二电极片的极性相反，第一电极片可以为正极片或负极片，相应地，第二电极片可以为负极片或正极片。电芯2设有极耳(第一极耳和第二极耳)的一侧的端面(即电芯2面向第一侧板11的一侧的端面)与电芯2的厚度方向平行。具体来说，电芯2中的电极片包括集流体，极耳(第一极耳21和第二极耳22)设置在集流体(第一集流体和第二集流体)上，具体可以设置在集流体的端部，电芯2面向第一侧板11的一侧的端面由多个层叠设置的电极片设有极耳的一侧的端面(电极片平行于其厚度方向的端面)形成。Specifically, as shown in Figures 8 to 12, the battery core 2 includes a plurality of stacked electrode sheets. The electrode sheets include a first electrode sheet and a second electrode sheet, which are separated by a separator. The first electrode The polarity of the electrode sheet is opposite to that of the second electrode sheet. The first electrode sheet can be a positive electrode sheet or a negative electrode sheet. Correspondingly, the second electrode sheet can be a negative electrode sheet or a positive electrode sheet. The end surface of the side of the battery core 2 provided with the tabs (the first tab and the second tab) (that is, the end surface of the side of the battery core 2 facing the first side plate 11 ) is parallel to the thickness direction of the battery core 2 . Specifically, the electrode sheet in the battery core 2 includes a current collector, and the tabs (the first tab 21 and the second tab 22) are arranged on the current collector (the first current collector and the second current collector). Specifically, it can be set At the end of the current collector, the end surface of the battery core 2 facing the first side plate 11 is formed by the end surface of a plurality of stacked electrode sheets with tabs (the end surface of the electrode sheet parallel to its thickness direction). .
电芯2可以包括叠片式电芯2和/或卷绕式电芯2，卷绕式电芯2是由多个电极片层叠设置后经卷绕而成，具体是由第一电极片、隔膜、第二电极片依次层叠设置后卷绕而成；叠片式电芯2具体是由第一电极片、隔膜、第二电极片依次层叠设置而成。该电池具体可以包括锂离子电池，但不局限于此。The battery core 2 may include a laminated battery core 2 and/or a wound battery core 2. The wound battery core 2 is formed by stacking a plurality of electrode sheets and then rolling them. Specifically, it is composed of a first electrode sheet, The separator and the second electrode sheet are stacked in sequence and then rolled; the laminated battery core 2 is specifically formed by the first electrode sheet, the separator, and the second electrode sheet being stacked in sequence. The battery may specifically include a lithium-ion battery, but is not limited thereto.
具体地，如图1至图3所示，壳体1可以包括第一侧板11、第二侧板12、第三侧板13、第四侧板14、第五侧板15、第六侧板16，第一侧板11、第二侧板12、第三侧板13、第四侧板14依次相接，并均分别位于第六侧板16(或称底板)和第五侧板15(或称盖板)之间，由此围设成密闭腔体，电芯2置于该腔体内。第一侧板11与第三侧板13位于第二侧板12(或第四侧板14)的相对两侧，第二侧板12与第四侧板14位于第一侧板11(或第三侧板13)的相对两侧，第五侧板15和第六侧板16分别位于第一侧板11(或第二侧板12、或第三侧板13、或第四侧板14)的相对两侧。第五侧板15至第六侧板16的方向为壳体1的厚度方向，第一侧板11至第三侧板13的方向可以为壳体1的长度方向，而第 二侧板12至第四侧板14的方向为壳体1的宽度方向，或者第一侧板11至第三侧板13的方向为壳体1的宽度方向，而第二侧板12至第四侧板14为壳体1的长度方向。电芯2的第一面和电芯2的第二面中的一者是电芯2面向第五侧板15的一面，另一者是电芯2面向第六侧板16的一面，第六绝缘层86位于第一连接片51与第五侧板15之间和/或位于第五连接片55与第五侧板15之间。Specifically, as shown in FIGS. 1 to 3 , the housing 1 may include a first side plate 11 , a second side plate 12 , a third side plate 13 , a fourth side plate 14 , a fifth side plate 15 , a sixth side plate. Board 16, the first side panel 11, the second side panel 12, the third side panel 13, and the fourth side panel 14 are connected in sequence, and are located at the sixth side panel 16 (or bottom panel) and the fifth side panel 15 respectively. (or cover), a closed cavity is formed, and the battery core 2 is placed in the cavity. The first side panel 11 and the third side panel 13 are located on opposite sides of the second side panel 12 (or the fourth side panel 14 ). The second side panel 12 and the fourth side panel 14 are located on the first side panel 11 (or the fourth side panel 14 ). On the opposite sides of the three side panels 13), the fifth side panel 15 and the sixth side panel 16 are respectively located on the first side panel 11 (or the second side panel 12, or the third side panel 13, or the fourth side panel 14). opposite sides of. The direction of the fifth side plate 15 to the sixth side plate 16 is the thickness direction of the casing 1 , the direction of the first side plate 11 to the third side plate 13 can be the length direction of the casing 1 , and the direction of the first side plate 11 to the third side plate 13 can be the length direction of the casing 1 . The direction of the second side plate 12 to the fourth side plate 14 is the width direction of the casing 1, or the direction of the first side plate 11 to the third side plate 13 is the width direction of the casing 1, and the direction of the second side plate 12 to the third side plate 12 is the width direction of the casing 1. The four side plates 14 are the length direction of the housing 1 . One of the first side of the battery core 2 and the second side of the battery core 2 is the side of the battery core 2 facing the fifth side plate 15 , and the other is the side of the battery core 2 facing the sixth side plate 16 . The insulating layer 86 is located between the first connecting piece 51 and the fifth side plate 15 and/or between the fifth connecting piece 55 and the fifth side plate 15 .
其中，第一侧板11和第二侧板12之间、第二侧板12与第三侧板13之间、第三侧板13与第四侧板14之间可以通过圆弧过渡部17连接，即相邻的两个侧板的连接部位通过圆弧过渡。具体地，该圆弧过渡部17垂直于第一方向的横截面背离腔体的一边和面向腔体的一边均分别为弧线，其形成开口朝向腔体的凹槽，该第一方向平行于从第五侧板15至第六侧板16的方向(即壳体1的厚度方向)。Among them, arc transition portions 17 can be passed between the first side plate 11 and the second side plate 12 , between the second side plate 12 and the third side plate 13 , and between the third side plate 13 and the fourth side plate 14 . Connection, that is, the connecting part of two adjacent side panels is transitioned through an arc. Specifically, the arc transition portion 17 has a cross-section perpendicular to the first direction. The side away from the cavity and the side facing the cavity are arcs respectively, forming a groove with an opening facing the cavity. The first direction is parallel to The direction from the fifth side plate 15 to the sixth side plate 16 (that is, the thickness direction of the housing 1).
壳体1上还可以设有减薄部151，减薄部151的机械强度小于壳体1除减薄部151外的其他部分的机械强度，由此，当电池内部压力过大时，可以优先通过减薄部151泄压，以避免电池爆炸等现象的发生。具体地，可以在第五侧板15上设置减薄部151(第五侧板15的表面可以平行于电极片的表面)。具体地，减薄部151的厚度小于壳体1上除减薄部151外的其他部分的厚度。The case 1 can also be provided with a thinned portion 151. The mechanical strength of the thinned portion 151 is smaller than the mechanical strength of other parts of the case 1 except the thinned portion 151. Therefore, when the internal pressure of the battery is too high, priority can be given to The pressure is released through the thinned portion 151 to avoid battery explosion and other phenomena. Specifically, the thinned portion 151 may be provided on the fifth side plate 15 (the surface of the fifth side plate 15 may be parallel to the surface of the electrode sheet). Specifically, the thickness of the thinned portion 151 is smaller than the thickness of other portions of the housing 1 except the thinned portion 151 .
此外，壳体1上还设有注液孔100、以及用于密封注液孔100的密封片，注液孔100用于向腔体中注入电解液，注入电解液后，用密封片对注液孔100进行密封，该密封片可以包括金属片，其可以与注液孔100周边的壳体1焊接，以对注液孔100进行密封。In addition, the housing 1 is also provided with a liquid injection hole 100 and a sealing sheet for sealing the liquid injection hole 100. The liquid injection hole 100 is used for injecting electrolyte into the cavity. After the electrolyte is injected, the sealing sheet is used to seal the injection hole. The liquid hole 100 is sealed. The sealing sheet may include a metal sheet, which may be welded to the housing 1 around the liquid injection hole 100 to seal the liquid injection hole 100 .
具体地，注液孔100可以设置在第一侧板11上，具体可以位于第一侧板11与第二中间件的相接部位和第一侧板11与第一承接件31的相接部位(或外接片41)之间，密封片可以与第一侧板11背离腔体的一侧焊接，具体可以焊接在第一侧板11位于注液孔100周边的部分，以对注液孔100进行密封。Specifically, the liquid injection hole 100 can be provided on the first side plate 11 , specifically, it can be located at the joint between the first side plate 11 and the second middle piece and at the joint between the first side plate 11 and the first receiving member 31 (or external piece 41), the sealing piece can be welded to the side of the first side plate 11 facing away from the cavity. Specifically, it can be welded to the part of the first side plate 11 located around the liquid injection hole 100 to oppose the liquid injection hole 100. Make a seal.
如上所述的焊接具体可以是激光焊接，例如，第一中间件的第一连接片51可以与第一承接件31通过激光焊接完成连接、采用密封片通过激光焊接对注液孔100进行密封等。The above-mentioned welding may specifically be laser welding. For example, the first connecting piece 51 of the first intermediate piece may be connected to the first receiving member 31 through laser welding, and a sealing piece may be used to seal the liquid injection hole 100 through laser welding, etc. .
第一极耳21可以是正极耳或负极耳，即第一极耳21和第二极耳22中的一者是正极耳，另一者是负极耳，优选第一极耳21为正极耳。The first pole tab 21 may be a positive pole tab or a negative pole tab, that is, one of the first pole tab 21 and the second pole tab 22 is a positive pole tab, and the other is a negative pole tab. Preferably, the first pole tab 21 is a positive pole tab.
壳体1具体可以是金属包装壳，即其可以是金属材质，意即第一侧板11、第二侧板12、第三侧板13、第四侧板14、第五侧板15、第六侧板16可以是金属材质，例如铝、铝合金、镍、铁或镍铁合金等。The housing 1 may specifically be a metal packaging shell, that is, it may be made of metal, that is, the first side plate 11 , the second side plate 12 , the third side plate 13 , the fourth side plate 14 , the fifth side plate 15 , The six side plates 16 may be made of metal, such as aluminum, aluminum alloy, nickel, iron or nickel-iron alloy.
一般情况下，当壳体1与正极耳电连接时，壳体1可以是与正极耳同极性的材质，例如分别为铝或铝合金，二者的具体材质种类可以相同或不同(二者材质不同时，例如正极耳的材质是铝，而壳体1的材质是铝合金)；当壳体1与负极耳电连接时，壳体1与负极耳是同极性材质，例如分别为镍、铁或镍铁合金，二者的具体材质种类可以相同或不同。Generally, when the housing 1 is electrically connected to the positive terminal, the housing 1 can be made of the same polarity material as the positive terminal, such as aluminum or aluminum alloy respectively. The specific materials of the two can be the same or different (the two materials can be the same or different). When the materials are different, for example, the material of the positive electrode ear is aluminum, and the material of the housing 1 is aluminum alloy); when the housing 1 and the negative electrode ear are electrically connected, the housing 1 and the negative electrode ear are made of the same polarity, such as nickel respectively. , iron or nickel-iron alloy, the specific material types of the two can be the same or different.
此外，第一承接件31的材质、第一中间件的材质、第一极耳21的材质可以是同极性材质，例如，第一极耳21为正极耳，第一承接件31的材质、第一中间件的材质、第一极 耳21的材质分别可以为铝或铝合金，其具体材质种类可以相同或不同。第二承接件32的材质、第二中间件的材质、第二极耳22的材质可以是同极性材质，例如，第二极耳22为负极耳，第二承接件32的材质、第二中间件的材质、第二极耳22的材质分别可以为镍、铁或镍铁合金，其具体材质种类可以相同或不同。In addition, the material of the first receiving member 31, the material of the first intermediate member, and the material of the first tab 21 may be materials of the same polarity. For example, the first tab 21 is a positive tab, and the materials of the first receiving member 31, The material of the first middleware, the first pole The material of the ears 21 can be aluminum or aluminum alloy respectively, and the specific material types can be the same or different. The material of the second receiving member 32, the material of the second middle member, and the material of the second tab 22 may be materials of the same polarity. For example, the second tab 22 is a negative tab, and the material of the second receiving member 32, the second The material of the middle piece and the material of the second pole lug 22 can be nickel, iron or nickel-iron alloy respectively, and their specific material types can be the same or different.
以上对本发明的实施方式进行了说明。但是，本发明不限定于上述实施方式。凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。 The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiment. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (31)

  1. 一种电池，其特征在于，包括：A battery, characterized in that it includes:
    壳体，围设成腔体；所述壳体包括第一侧板；The shell is surrounded by a cavity; the shell includes a first side plate;
    电芯，位于所述腔体内，所述电芯设有第一极耳；A battery core is located in the cavity, and the battery core is provided with a first tab;
    外接片，与所述第一极耳电连接，所述外接片位于所述第一侧板背离所述腔体的一侧，所述外接片包括向外凸起形成的极柱，所述第一侧板包括与所述极柱对应设置的第二通孔，所述极柱通过所述第二通孔与所述第一极耳相连；沿从所述第一侧板至所述电芯的方向，所述极柱的直径呈增大或减小趋势。An external connection piece is electrically connected to the first tab. The external connection piece is located on the side of the first side plate away from the cavity. The external connection piece includes a pole formed by protruding outwards. The third external connection piece is One side plate includes a second through hole corresponding to the pole, and the pole is connected to the first tab through the second through hole; along the line from the first side plate to the battery core direction, the diameter of the pole shows an increasing or decreasing trend.
  2. 根据权利要求1所述的电池，其特征在于，所述电池还包括位于所述第一侧板与所述电芯之间的第一承接件，所述第一承接件与所述第一极耳电连接，所述第一承接件设有与所述极柱对应设置的第一通孔，所述极柱通过所述第一通孔与所述第一承接件相连。The battery according to claim 1, wherein the battery further includes a first receiving member located between the first side plate and the battery core, and the first receiving member is connected to the first pole. The ears are electrically connected, and the first receiving member is provided with a first through hole corresponding to the pole, and the pole is connected to the first receiving member through the first through hole.
  3. 根据权利要求2所述的电池，其特征在于，所述第一承接件的第一通孔包括有相互连接的第一孔段和第二孔段，所述第二孔段位于所述第一孔段靠近所述电芯的一侧；The battery according to claim 2, wherein the first through hole of the first receiving member includes a first hole section and a second hole section connected to each other, and the second hole section is located on the first hole section. The hole section is close to the side of the battery core;
    所述极柱靠近所述电芯的一端向外延伸形成有与所述第二孔段对应设置的外延部。One end of the pole close to the battery core extends outward to form an extension portion corresponding to the second hole section.
  4. 根据权利要求2或3所述的电池，其特征在于，所述极柱的靠近电芯的一端面与所述第一承接件的靠近电芯的一侧表面齐平。The battery according to claim 2 or 3, wherein an end surface of the pole close to the battery core is flush with a surface of the first receiving member close to the battery core.
  5. 根据权利要求2所述的电池，其特征在于，所述极柱靠近所述电芯的一端伸出所述第一通孔、并沿所述第一通孔的周向向外延伸形成有与所述第一承接件靠近所述电芯的一侧表面相接的外延部。The battery according to claim 2, wherein one end of the pole close to the battery core protrudes from the first through hole and extends outward along the circumferential direction of the first through hole to form a The first receiving member is close to an extension portion in contact with one side surface of the battery core.
  6. 根据权利要求2所述的电池，其特征在于，所述外接片与所述第一侧板之间还设有第一绝缘片，所述第一承接件与所述第一侧板之间还设有第二绝缘片，所述极柱穿透所述第一绝缘片和所述第二绝缘片；和/或，The battery according to claim 2, wherein a first insulating piece is disposed between the external piece and the first side plate, and a first insulating piece is disposed between the first receiving member and the first side plate. A second insulating sheet is provided, and the pole penetrates the first insulating sheet and the second insulating sheet; and/or,
    所述极柱与所述第一侧板之间设有第一绝缘层；和/或，A first insulation layer is provided between the pole and the first side plate; and/or,
    所述第一承接件与所述电芯之间设有第二绝缘层。A second insulation layer is provided between the first receiving member and the battery core.
  7. 根据权利要求6所述的电池，其特征在于，The battery according to claim 6, characterized in that:
    所述壳体还包括与所述第一侧板相连的第六侧板；The housing also includes a sixth side plate connected to the first side plate;
    所述第二绝缘片包括第一绝缘部和第二绝缘部，所述第一绝缘部位于所述第一承接件与所述第一侧板之间，所述极柱穿透所述第一绝缘部；所述第二绝缘部位于所述第一承接件与所述第六侧板之间。The second insulating sheet includes a first insulating part and a second insulating part, the first insulating part is located between the first receiving member and the first side plate, and the pole penetrates the first Insulating part; the second insulating part is located between the first receiving member and the sixth side plate.
  8. 根据权利要求7所述的电池，其特征在于，The battery according to claim 7, characterized in that:
    所述第二绝缘部在所述第六侧板上的投影覆盖所述第一承接件在所述第六侧板上的投影；和/或，The projection of the second insulating part on the sixth side plate covers the projection of the first receiving member on the sixth side plate; and/or,
    所述第一绝缘部在所述第一侧板上的投影覆盖所述第一承接件在所述第一侧板上的投影；和/或， The projection of the first insulating part on the first side plate covers the projection of the first receiving member on the first side plate; and/or,
    所述第一绝缘部和所述第二绝缘部之间的夹角范围为80°～120°。The included angle between the first insulating part and the second insulating part ranges from 80° to 120°.
  9. 根据权利要求6-8任一项所述的电池，其特征在于，The battery according to any one of claims 6-8, characterized in that,
    所述第一绝缘片在所述第一侧板上的投影覆盖所述外接片在第一侧板上的投影。The projection of the first insulating sheet on the first side panel covers the projection of the external connecting sheet on the first side panel.
  10. 根据权利要求6所述的电池，其特征在于，所述电芯包括多个层叠设置的电极片，所述电芯具有相对设置的第一侧面和第二侧面，其中，所述第二绝缘层延伸至所述电芯的第一侧面并与位于所述电芯的第一侧面的电极片粘接，和/或，所述第二绝缘层延伸至所述电芯的第二侧面并与位于所述电芯的第二侧面的电极片粘接。The battery according to claim 6, wherein the battery core includes a plurality of stacked electrode sheets, the battery core has a first side and a second side arranged oppositely, wherein the second insulating layer The second insulating layer extends to the first side of the battery core and is bonded to the electrode sheet located on the first side of the battery core, and/or the second insulating layer extends to the second side of the battery core and is bonded to the electrode sheet located on the first side of the battery core. The electrode sheet on the second side of the battery core is bonded.
  11. 根据权利要求2所述的电池，其特征在于，所述第一承接件在所述第一侧板上的投影与所述第一极耳在所述第一侧板上的投影不重叠。The battery according to claim 2, wherein the projection of the first receiving member on the first side plate does not overlap with the projection of the first tab on the first side plate.
  12. 根据权利要求11所述的电池，其特征在于，所述壳体包括与所述第一侧板相连接的第二侧板，所述第一承接件在所述第二侧板上的投影与所述第一极耳在所述第二侧板上的投影至少部分重叠。The battery according to claim 11, wherein the housing includes a second side plate connected to the first side plate, and the projection of the first receiving member on the second side plate is the same as the projection of the first side plate. The projection of the first tab on the second side plate at least partially overlaps.
  13. 根据权利要求2所述的电池，其特征在于，The battery according to claim 2, characterized in that:
    所述电芯设有所述第一极耳的一侧的端面与所述电芯的厚度方向平行；和/或，The end surface of the side of the battery core provided with the first tab is parallel to the thickness direction of the battery core; and/or,
    所述第一极耳背离所述电芯的一侧至所述第一极耳与所述电芯相接的一侧的距离不大于所述第一承接件沿所述第一侧板至所述第一极耳的方向的长度；和/或，The distance from the side of the first tab away from the battery core to the side of the first tab connected to the battery core is no longer than the distance from the first receiving member to the side along the first side plate. The length in the direction of the first pole; and/or,
    沿所述第一侧板至所述第一极耳的方向，所述第一承接件的长度为1mm-3mm。Along the direction from the first side plate to the first tab, the length of the first receiving member is 1mm-3mm.
  14. 根据权利要求2所述的电池，其特征在于，所述电池还包括位于所述电芯与所述第一侧板之间的第一中间件，所述第一中间件分别与所述第一极耳和所述第一承接件连接。The battery according to claim 2, wherein the battery further includes a first middle piece located between the battery core and the first side plate, and the first middle piece is connected to the first side plate respectively. The pole lug is connected to the first receiving member.
  15. 根据权利要求14所述的电池，其特征在于，所述第一中间件包括有与所述第一承接件连接的第一连接片、与所述第一极耳的背离所述电芯的一侧相接的第四连接片。The battery according to claim 14, characterized in that the first middle member includes a first connecting piece connected to the first receiving member, and a portion of the first tab away from the battery core. The fourth connecting piece connected side by side.
  16. 根据权利要求15所述的电池，其特征在于，所述第一中间件还包括分别与所述第一连接片和第四连接片连接起来的第一连接组件；The battery according to claim 15, wherein the first middle member further includes a first connection component connected to the first connecting piece and the fourth connecting piece respectively;
    所述第一连接组件包括第二连接片和第三连接片；The first connection component includes a second connecting piece and a third connecting piece;
    所述第二连接片位于所述第一承接件与所述电芯之间；The second connecting piece is located between the first receiving member and the battery core;
    在从所述第一承接件至所述第一极耳的方向上，所述第三连接片位于所述第一极耳和所述第一承接件之间；In the direction from the first receiving member to the first pole tab, the third connecting piece is located between the first pole tab and the first receiving member;
    所述第一连接片、第二连接片、第三连接片、第四连接片依次相连。The first connecting piece, the second connecting piece, the third connecting piece, and the fourth connecting piece are connected in sequence.
  17. 根据权利要求15所述的电池，其特征在于，The battery according to claim 15, characterized in that:
    所述第一连接片包括与所述第一承接件相接的第一连接部、以及沿所述第一侧板的延伸方向延伸的第二连接部，所述第二连接部与所述第四连接片相连。The first connecting piece includes a first connecting portion connected to the first receiving member and a second connecting portion extending along the extending direction of the first side plate. The second connecting portion is connected to the first connecting piece. The four connecting pieces are connected.
  18. 根据权利要求15所述的电池，其特征在于，The battery according to claim 15, characterized in that:
    所述第一连接片背离所述第一承接件的一侧还设有第六绝缘层；和/或，A sixth insulation layer is also provided on the side of the first connecting piece facing away from the first receiving member; and/or,
    所述第一承接件与所述第一连接片相接的一面和所述第四连接片与所述第一极耳相接的一面之间形成有第一夹角，所述第一夹角的范围为80-120°；和/或， A first included angle is formed between the side of the first receiving member that connects to the first connecting piece and the side that connects the fourth connecting piece to the first tab. The range is 80-120°; and/or,
    所述第一连接片与所述第一承接件焊接；和/或，The first connecting piece is welded to the first receiving member; and/or,
    所述电芯包括多个层叠设置的电极片，所述第一连接片与所述第一承接件相接的一面和所述电极片的表面平行。The battery core includes a plurality of stacked electrode sheets, and a side of the first connecting sheet that is in contact with the first receiving member is parallel to the surface of the electrode sheet.
  19. 根据权利要求15所述的电池，其特征在于，所述电池还包括第三绝缘层，所述第三绝缘层位于所述第一中间件和所述第一侧板之间。The battery according to claim 15, wherein the battery further includes a third insulating layer located between the first middle member and the first side plate.
  20. 根据权利要求19所述的电池，其特征在于，所述第三绝缘层包括位于所述第四连接片背离所述第一极耳的一面的第一部分。The battery according to claim 19, wherein the third insulating layer includes a first portion located on a side of the fourth connecting piece facing away from the first tab.
  21. 根据权利要求20所述的电池，其特征在于，The battery according to claim 20, characterized in that:
    所述电芯包括多个层叠设置的电极片；The battery core includes a plurality of stacked electrode sheets;
    所述电芯具有相对设置的第一侧面和第二侧面；The battery core has a first side and a second side arranged oppositely;
    所述第三绝缘层还包括自所述第一部分靠近所述电芯的第一侧面的一端向靠近所述电芯的方向延伸形成的第二部分以及自所述第一部分靠近所述电芯的第二侧面的一端向靠近所述电芯的方向延伸形成的第三部分。The third insulating layer further includes a second part extending from an end of the first part close to the first side of the battery core in a direction close to the battery core, and a second part extending from the first part close to the battery core. A third part is formed by extending from one end of the second side surface in a direction close to the battery core.
  22. 根据权利要求21所述的电池，其特征在于，The battery according to claim 21, characterized in that:
    所述第一极耳在所述电芯的厚度方向上的投影位于所述第三绝缘层的第二部分在所述电芯的厚度方向上的投影内，和/或，The projection of the first tab in the thickness direction of the battery core is located within the projection of the second part of the third insulating layer in the thickness direction of the battery core, and/or,
    所述第一极耳在所述电芯的厚度方向上的投影位于所述第三绝缘层的第三部分在所述电芯的厚度方向上的投影内；和/或，The projection of the first tab in the thickness direction of the battery core is located within the projection of the third part of the third insulating layer in the thickness direction of the battery core; and/or,
    所述第一极耳在所述电芯的长度方向上的投影位于所述第三绝缘层的第一部分在所述电芯的长度方向上的投影内。The projection of the first tab in the length direction of the battery core is located within the projection of the first part of the third insulating layer in the length direction of the battery core.
  23. 根据权利要求21或22所述的电池，其特征在于，The battery according to claim 21 or 22, characterized in that:
    所述第三绝缘层的第二部分延伸至所述电芯的第一侧面并与位于所述电芯的第一侧面的电极片粘接；和/或，The second part of the third insulating layer extends to the first side of the battery core and is bonded to the electrode sheet located on the first side of the battery core; and/or,
    所述第三绝缘层的第三部分延伸至所述电芯的第二侧面并与位于所述电芯的第二侧面的电极片粘接。The third part of the third insulating layer extends to the second side of the battery core and is bonded to the electrode sheet located on the second side of the battery core.
  24. 根据权利要求2所述的电池，其特征在于，The battery according to claim 2, characterized in that:
    所述电芯包括多个层叠设置的电极片，所述电极片包括第一集流体，所述第一极耳设置在所述第一集流体上；The battery core includes a plurality of stacked electrode sheets, the electrode sheets include a first current collector, and the first tab is disposed on the first current collector;
    沿所述第一承接件至所述电芯的方向，所述第一承接件与所述第一集流体之间的距离小于1毫米。Along the direction from the first receiving member to the battery core, the distance between the first receiving member and the first current collector is less than 1 mm.
  25. 根据权利要求1所述的电池，其特征在于，The battery according to claim 1, characterized in that:
    所述电芯还设有第二极耳，所述第二极耳与所述第一极耳的极性相反；The battery core is also provided with a second tab, and the second tab has an opposite polarity to the first tab;
    所述电池还包括第二承接件，所述第二承接件与所述第二极耳电连接，所述第二承接件设置在所述第一侧板和所述电芯之间，所述第二承接件在所述第一侧板上的投影与所述第二极耳在所述第一侧板上的投影不重叠。 The battery further includes a second receiving member, the second receiving member is electrically connected to the second tab, and the second receiving member is disposed between the first side plate and the battery core. The projection of the second receiving member on the first side plate does not overlap with the projection of the second pole on the first side plate.
  26. 根据权利要求25所述的电池，其特征在于，所述壳体包括与所述第一侧板相连接的第二侧板，所述第一极耳在所述第二侧板上的投影与所述第二极耳在所述第二侧板上的投影至少部分重叠；和/或，The battery according to claim 25, wherein the housing includes a second side plate connected to the first side plate, and the projection of the first tab on the second side plate is the same as the projection of the first tab on the second side plate. The projection of the second tab on the second side plate at least partially overlaps; and/or,
    所述第二承接件在所述第二侧板上的投影与所述第二极耳在所述第二侧板上的投影至少部分重叠。The projection of the second receiving member on the second side plate and the projection of the second tab on the second side plate at least partially overlap.
  27. 根据权利要求25或26所述的电池，其特征在于，The battery according to claim 25 or 26, characterized in that,
    所述电池还包括位于所述第一侧板与所述电芯之间的第一承接件，所述第一承接件与所述第一极耳电连接，所述第一极耳和所述第二极耳位于所述第一承接件和第二承接件之间；和/或，The battery further includes a first receiving member located between the first side plate and the battery core, the first receiving member is electrically connected to the first tab, and the first tab and the The second tab is located between the first receiving member and the second receiving member; and/or,
    所述第二承接件与所述第一侧板焊接；和/或，The second receiving member is welded to the first side plate; and/or,
    所述第二极耳背离所述电芯的一侧至所述第二极耳与所述电芯相接的一侧的距离不大于所述第二承接件沿所述第一侧板至所述第二极耳的方向的长度；和/或，The distance from the side of the second tab away from the battery core to the side of the second tab connected to the battery core is no longer than the distance from the second receiving member to the side along the first side plate. The length in the direction of the second pole; and/or,
    沿所述第一侧板至所述第二极耳的方向，所述第二承接件的长度为1mm-4mm；和/或，Along the direction from the first side plate to the second tab, the length of the second receiving member is 1mm-4mm; and/or,
    沿所述第一侧板至所述第二极耳的方向，所述第二承接件的长度等于或大于所述第一承接件的长度。Along the direction from the first side plate to the second tab, the length of the second receiving member is equal to or greater than the length of the first receiving member.
  28. 根据权利要求1所述的电池，其特征在于，所述电芯具有相对设置的第一面和第二面，以及位于所述第一面和第二面之间的侧面，在所述电芯的至少一侧侧面的至少部分区域设有保护胶层。The battery according to claim 1, characterized in that the battery core has a first surface and a second surface arranged oppositely, and a side surface located between the first surface and the second surface, and the battery core At least part of at least one side is provided with a protective adhesive layer.
  29. 根据权利要求28所述的电池，其特征在于，所述电芯包括多个层叠设置的电极片，所述电芯的保护胶层延伸至所述电芯的第一面并与位于所述电芯的第一面的电极片粘结和/或延伸至所述电芯的第二面并与位于所述电芯的第二面的电极片粘接。The battery according to claim 28, wherein the battery core includes a plurality of stacked electrode sheets, and the protective adhesive layer of the battery core extends to the first surface of the battery core and is in contact with the battery core. The electrode sheets on the first side of the core are bonded and/or extended to the second side of the battery core and bonded to the electrode sheets located on the second side of the battery core.
  30. 根据权利要求28或29所述的电池，其特征在于，所述保护胶层设有一个或多个第五通孔。The battery according to claim 28 or 29, wherein the protective adhesive layer is provided with one or more fifth through holes.
  31. 根据权利要求1所述的电池，其特征在于，The battery according to claim 1, characterized in that:
    所述第一极耳为正极耳或负极耳；和/或，The first pole is a positive pole or a negative pole; and/or,
    所述电芯包括叠片式电芯或卷绕式电芯。 The battery core includes a laminated battery core or a wound battery core.
PCT/CN2023/075910 2022-03-26 2023-02-14 Battery WO2023185285A1 (en)

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Publication number Priority date Publication date Assignee Title
CN114614214A (en) * 2022-03-26 2022-06-10 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114665233A (en) * 2022-03-26 2022-06-24 珠海冠宇电池股份有限公司 Battery with a battery cell

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CN114614214A (en) * 2022-03-26 2022-06-10 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114614209A (en) * 2022-03-26 2022-06-10 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114665233A (en) * 2022-03-26 2022-06-24 珠海冠宇电池股份有限公司 Battery with a battery cell

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JPH10208723A (en) * 1997-01-27 1998-08-07 Furukawa Battery Co Ltd:The Storage battery
CN201149877Y (en) * 2008-01-28 2008-11-12 苏州星恒电源有限公司 Battery electrode drawing-off sealing structure
CN210156473U (en) * 2019-07-30 2020-03-17 河北化工医药职业技术学院 Graphene diaphragm structure of lithium battery
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CN213717023U (en) * 2020-11-20 2021-07-16 常州瑞德丰精密技术有限公司 Simple connecting sheet
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CN215771455U (en) * 2021-08-25 2022-02-08 比亚迪股份有限公司 Battery with a battery cell
CN114614214A (en) * 2022-03-26 2022-06-10 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114614209A (en) * 2022-03-26 2022-06-10 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114665233A (en) * 2022-03-26 2022-06-24 珠海冠宇电池股份有限公司 Battery with a battery cell

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