WO2022107712A1 - 円筒形電池 - Google Patents
円筒形電池 Download PDFInfo
- Publication number
- WO2022107712A1 WO2022107712A1 PCT/JP2021/041862 JP2021041862W WO2022107712A1 WO 2022107712 A1 WO2022107712 A1 WO 2022107712A1 JP 2021041862 W JP2021041862 W JP 2021041862W WO 2022107712 A1 WO2022107712 A1 WO 2022107712A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sealing body
- positive electrode
- negative electrode
- cylindrical battery
- electrode
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 abstract description 26
- 238000002788 crimping Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 5
- 239000003125 aqueous solvent Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011255 nonaqueous electrolyte Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- -1 lithium transition metal Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
Images
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
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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
-
- 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
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
- H01M50/56—Cup shaped terminals
-
- 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
Definitions
- This disclosure relates to a cylindrical battery.
- an outer can has a grooved portion whose side surface is partially overhanging inward, the open end of the outer can is bent inward, and a gasket interposed between the grooved portion and the open end is placed in the vertical direction.
- the sealing body is crimped and fixed by compressing it to.
- positive electrode leads and negative electrode leads protrude from the positive electrode and negative electrode contained in the electrode body, respectively.
- the sealing body is connected to the positive electrode lead to become a positive electrode external terminal, and the outer can is connected to the negative electrode lead to form a negative electrode external terminal. Become.
- an external lead is connected to each of the sealing body and the outer can, and the plurality of cylindrical batteries are connected to each other by the external lead.
- an external lead may be connected to the open end of the outer can located on the battery sealing body side and to the adjacent battery sealing body.
- the open end of the outer can is short, so workability when connecting an external lead to the open end is not good.
- the gasket cannot be uniformly compressed at the open end, wrinkles and wrinkles occur, and the flatness of the open end deteriorates. Therefore, the external lead cannot be stably connected to the end of the opening as an external terminal.
- an object of the present disclosure is to provide a cylindrical battery having an external terminal at the open end of the outer can, which has a polarity different from that of the sealing body and is easily connected to an external lead.
- the cylindrical battery according to one aspect of the present disclosure includes an electrode body including a positive electrode and a negative electrode, a bottomed cylindrical outer can that houses the electrode body and is connected to either the positive electrode or the negative electrode, and the positive electrode and the negative electrode.
- the outer can has a grooved portion and the opening end extends radially outward, and the sealing body has a holding member and a grooved portion joined to the opening end portion. It is characterized in that it is caulked and fixed via a gasket between the and.
- the holding member is joined to the opening end while extending the opening end radially outward.
- the holding member or the opening end functions as an external terminal having a polarity different from that of the sealing body. Since it is easier to secure the flatness and the area of the holding member and the open end according to one aspect of the present disclosure as compared with the open end of the outer can of the conventional cylindrical battery, the open end of the outer can In addition, it is possible to form an external terminal having a polarity different from that of the sealing body and easy to connect an external lead.
- FIG. 1 is an enlarged view of a part of the upper end of the outer can in FIG. It is a figure corresponding to FIG. 2 in another example of an embodiment.
- FIG. 1 is a vertical sectional view of a cylindrical battery 10 which is an example of an embodiment.
- the cylindrical battery 10 has an electrode body 14, a bottomed cylindrical outer can 16 accommodating the electrode body 14 and an electrolyte (not shown), and a gasket 18 at the opening of the outer can 16. It is provided with a sealing body 17 that closes through.
- the electrode body 14 includes a positive electrode 11, a negative electrode 12, and a separator 13, and has a structure in which the positive electrode 11 and the negative electrode 12 are spirally wound via the separator 13.
- the direction along the axial direction of the outer can 16 is referred to as "vertical direction or vertical direction”
- the sealing body 17 side is referred to as "upper”
- the bottom surface side of the outer can 16 is referred to as "lower”. do.
- the direction perpendicular to the axial direction of the outer can 16 will be referred to as "horizontal direction or radial direction"
- the radial inner side of the outer can 16 will be referred to as the inner side
- the radial outer side will be referred to as the outer side.
- the positive electrode 11 has a positive electrode core body and a positive electrode mixture layer formed on at least one surface of the core body.
- a metal foil stable in the potential range of the positive electrode 11 such as aluminum or an aluminum alloy, a film in which the metal is arranged on the surface layer, or the like can be used.
- the positive electrode mixture layer contains a positive electrode active material, a conductive agent such as acetylene black, and a binder such as polyvinylidene fluoride, and is preferably formed on both sides of the positive electrode core.
- a lithium transition metal composite oxide or the like is used for example.
- the negative electrode 12 has a negative electrode core body and a negative electrode mixture layer formed on at least one surface of the core body.
- a metal foil stable in the potential range of the negative electrode 12 such as copper or a copper alloy, a film in which the metal is arranged on the surface layer, or the like can be used.
- the negative electrode mixture layer contains a negative electrode active material and a binder such as styrene-butadiene rubber (SBR), and is preferably formed on both sides of the negative electrode core.
- SBR styrene-butadiene rubber
- the negative electrode active material for example, graphite, a silicon-containing compound or the like is used.
- the electrolyte may be an aqueous electrolyte or a non-aqueous electrolyte. Further, it may be either a liquid electrolyte or a solid electrolyte. In this embodiment, a non-aqueous electrolyte is used.
- the non-aqueous electrolyte contains a non-aqueous solvent and an electrolyte salt dissolved in the non-aqueous solvent.
- the non-aqueous solvent for example, esters, ethers, nitriles, amides, and a mixed solvent of two or more of these can be used.
- the non-aqueous solvent may contain a halogen-substituted product in which at least a part of hydrogen in these solvents is substituted with a halogen atom such as fluorine.
- a halogen atom such as fluorine.
- the electrolyte salt for example, a lithium salt such as LiPF 6 is used.
- the cylindrical battery 10 includes insulating plates 19 and 20 arranged above and below the electrode body 14, respectively.
- the outer can 16 is connected to either the positive electrode 11 or the negative electrode 12, and the sealing body 17 is connected to the other of the positive electrode 11 and the negative electrode 12.
- the positive electrode lead 21 connected to the positive electrode 11 extends toward the sealing body 17 through the through hole of the insulating plate 19, and the negative electrode lead 22 connected to the negative electrode 12 passes through the outside of the insulating plate 20. It extends to the bottom surface side of the outer can 16.
- the positive electrode lead 21 is connected to the internal terminal plate 25 which is the bottom plate of the sealing body 17 by welding or the like, and the rupture plate 26 of the sealing body 17 electrically connected to the internal terminal plate 25 serves as the positive electrode external terminal.
- the negative electrode lead 22 is connected to the inner surface of the bottom surface of the outer can 16 by welding or the like, and the outer can 16 serves as a negative electrode external terminal.
- the negative electrode lead may be connected to the inner surface of the sealing body 17, and the positive electrode lead may be connected to the inner surface of the outer can 16.
- the sealing body 17 serves as the negative electrode external terminal
- the outer can 16 serves as the positive electrode external terminal.
- the outer can 16 is a metal container having one end (upper end) open in the axial direction, and has a disk-like bottom surface and a cylindrical side surface along the outer peripheral edge of the bottom surface.
- the sealing body 17 is formed in a disk shape corresponding to the shape of the opening of the outer can 16.
- the gasket 18 is an annular member made of resin, which secures the airtightness inside the battery and also secures the electrical insulation of the outer can 16 and the sealing body 17.
- the outer can 16 has a grooved portion 23 whose side surface projects from the outside to the inside.
- the grooved portion 23 is formed in an annular shape along the circumferential direction of the outer can 16 by spinning processing from the outside of the side surface. Further, in the outer can 16, the edge portion of the opening is bent outward, and the opening end portion 16a extends outward in the radial direction.
- a pressing member 24 is joined to the opening end portion 16a, and the sealing body 17 is sandwiched between the pressing member 24 and the grooved portion 23. Further, in the present embodiment, the pressing member 24 has conductivity.
- the sealing body 17 is a disk-shaped member provided with a current cutoff mechanism.
- the sealing body 17 has a structure in which an internal terminal plate 25, an insulating plate 27, and a rupture plate 26 are laminated in this order from the electrode body 14 side.
- the internal terminal plate 25 is a metal plate including an annular portion 25a to which the positive electrode lead 21 is connected and a thin central portion 25b that is separated from the annular portion 25a when the internal pressure of the battery exceeds a predetermined threshold value.
- a ventilation hole 25c is formed in the annular portion 25a.
- the rupture plate 26 is arranged to face the internal terminal plate 25 with the insulating plate 27 interposed therebetween.
- the insulating plate 27 is formed with an opening 27a at the center in the radial direction and a ventilation hole 27b at a portion overlapping the ventilation hole 25c of the internal terminal plate 25.
- the rupture plate 26 has a valve portion 26a that breaks when the internal pressure of the battery exceeds a predetermined threshold value, and the valve portion 26a is welded to the central portion 25b of the internal terminal plate 25 through the opening 27a of the insulating plate 27. It is connected by.
- the insulating plate 27 insulates a portion other than the connecting portion between the annular portion 25a and the central portion 25b of the valve portion 26a.
- the valve portion 26a includes a convex downward convex portion inside the battery and a thin-walled portion formed around the downward convex portion, and is formed in the radial center portion of the rupture plate 26.
- the internal terminal plate 25 to which the positive electrode lead 21 is connected and the rupture plate 26 are electrically connected to form a current path from the electrode body 14 to the rupture plate 26.
- the internal terminal plate 25 is broken, the central portion 25b is separated from the annular portion 25a, and the valve portion 26a is deformed so as to be convex toward the upper side of the battery. This cuts off the current path.
- the valve portion 26a breaks and a gas discharge port is formed.
- the structure of the sealing body is not limited to the structure shown in FIG.
- the sealing body may have a laminated structure including two valve bodies, or may have a convex sealing body cap covering the valve body.
- a plurality of cylindrical batteries 10 are connected in series and modularized.
- the external lead is connected to the conductive holding member 24 and the sealing body 17 by welding or the like.
- the connection distance between the batteries can be shortened as compared with the case where the external lead is connected to the bottom surface of the outer can 16.
- FIG. 2 is an enlarged view of a part of the upper end of the outer can in FIG.
- the grooved portion 23 has a substantially U-shaped cross section, and the sealing body 17 is supported on the upper surface thereof.
- the length L1 of the grooved portion 23 is, for example, 0.5 to 3 mm.
- the length L1 of the grooved portion 23 means the length along the radial direction of the outer can 16 from the side surface to the inner end 23a of the grooved portion 23.
- the sealing body 17 can be stably supported while ensuring the mechanical strength of the outer can 16.
- the opening end portion 16a is formed by bending the opening edge portion (upper end portion) of the outer can 16 outward, and extends substantially horizontally outward in the radial direction.
- the length L2 of the opening end portion 16a is, for example, 0.5 to 3 mm.
- the length L2 of the open end portion 16a means the length along the radial direction from the side surface of the outer can 16 to the end portion. Similar to the grooved portion 23, the open end portion 16a is formed in an annular shape along the circumferential direction of the outer can 16.
- the holding member 24 is a flat plate.
- the thickness of the pressing member 24 is, for example, 0.05 to 0.5 mm.
- One end side of the pressing member 24 is joined to the opening end portion 16a, and the other end side of the pressing member 24 presses the peripheral edge portion of the sealing body 17 from above via the gasket 18.
- the lower portion of the sealing body 17 is supported by the grooved portion 23, and is caulked and fixed between the pressing member 24 and the grooved portion 23.
- the position of the outer end 24a of the holding member 24 is not particularly limited, but for example, as shown in FIG. 2, the upper end and the outer end 24a of the outer can 16 may be substantially aligned. Further, by locating the outer end 24a outside the upper end of the outer can 16, the area of the pressing member 24 becomes larger, and the stability and workability of the connection between the outer can 16 and the external lead are further improved. .. When the outer end 24a is located near the side surface of the outer can 16 and the upper surface of the open end 16a is exposed, the external lead can be connected to the open end 16a.
- the position of the inner end 24b of the pressing member 24 is not particularly limited as long as the pressing member 24 presses the sealing body 17 from above with an appropriate pressure via the gasket 18, and the groove is, for example, as shown in FIG. It may be outside the inner end 23a of the inlet 23.
- the pressing member 24 is preferably made of metal. As a result, the pressing member 24 can press the sealing body from above with an appropriate pressure while having good conductivity.
- the pressing member 24 may be a ring-shaped plate member. As a result, the sealing body 17 can be pressed from above substantially uniformly along the circumferential direction of the outer can 16.
- the outer diameter of the holding member 24 is, for example, ⁇ 20 to 30 mm and the hollow cut hole is ⁇ 15 to 20 mm.
- a welding method, an adhesive method, or the like can be used as a method of joining the pressing member 24 and the open end portion 16a.
- the welding method include laser welding and resistance welding, and laser welding is preferable.
- the bonding method include a method using an adhesive or solder.
- the adhesive preferably has conductivity. The surface roughness of the pressing member 24 may be increased to improve weldability.
- the material of the holding member 24 is preferably the same as the main component of the material of the outer can 16. As a result, the pressing member 24 and the open end portion 16a can be easily joined by laser welding.
- the material of the holding member 24 and the opening end portion 16a may be a steel plate material. Further, the surface of the steel plate material may be plated with, for example, nickel or the like.
- the pressing member 24 may have a bent portion 24c.
- FIG. 3 is a diagram corresponding to FIG. 2 in another example of the embodiment. As a result, the pressure at which the pressing member 24 presses the sealing body 17 can be increased, so that the airtightness inside the battery is further improved.
- the external lead may be connected to a portion where the upper surface of the open end portion 16a is exposed, or may be connected to the surface of the pressing member 24.
- press working is performed with a 90 ° bent portion formed near the upper end of a bottomed cylindrical outer can 16 made of a steel plate material, the upper end is trimmed, and the length is 0.5 to the outside in the radial direction.
- a 3 mm open end 16a is formed.
- the insulating plates 19 and 20 are arranged above and below the electrode body 14, and are housed in the outer can 16.
- the negative electrode lead 22 is welded to the bottom of the outer can 16, and the grooved portion 23 is formed on the side surface of the outer can 16 by pressing.
- the sealing body 17 is welded to the positive electrode lead 21, and an appropriate amount of non-aqueous electrolyte is injected into the outer can 16.
- the gasket 18 and the sealing body 17 are housed in the upper part of the grooved portion 23, and the pressing member 24 and the open end portion 16a are laser welded while compressing the gasket 18 on the inner end side of the ring-shaped pressing member 24. This makes it possible to manufacture a cylindrical battery.
- the open end portion 16a of the outer can 16 extends radially outward, and the sealing body 17 is formed between the holding member 24 joined to the open end portion 16a and the grooved portion 23. It is caulked and fixed via the gasket 18.
- the connection area of the external lead in the holding member 24 or the open end portion 16a can be sufficiently secured, so that the connection between the outer can and the external lead when modularizing the cylindrical battery 10 can be established. Stability and workability are improved.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (4)
- 正極及び負極を含む電極体と、
前記電極体を収容し、前記正極及び前記負極のいずれか一方と接続される有底円筒状の外装缶と、
前記正極及び前記負極の他方と接続される封口体とを備え、
前記外装缶は、溝入部を有し、且つ、開口端部が径方向外側に延出し、
前記封口体は、前記開口端部に接合した押さえ部材と前記溝入部との間にガスケットを介してかしめ固定されている、円筒形電池。 - 前記押さえ部材は、金属製である、請求項1に記載の円筒形電池。
- 前記押さえ部材は、環形状の板部材である、請求項1又は2に記載の円筒形電池。
- 前記押さえ部材の材質は、前記外装缶の材質の主成分と同じである、請求項1~3のいずれか1項に記載の円筒形電池。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/036,460 US20230402727A1 (en) | 2020-11-19 | 2021-11-15 | Cylindrical battery |
JP2022563735A JPWO2022107712A1 (ja) | 2020-11-19 | 2021-11-15 | |
EP21894586.3A EP4250440A1 (en) | 2020-11-19 | 2021-11-15 | Cylindrical battery |
CN202180076531.7A CN116724448A (zh) | 2020-11-19 | 2021-11-15 | 圆筒形电池 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020192302 | 2020-11-19 | ||
JP2020-192302 | 2020-11-19 |
Publications (1)
Publication Number | Publication Date |
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WO2022107712A1 true WO2022107712A1 (ja) | 2022-05-27 |
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WO2023242167A1 (en) * | 2022-06-14 | 2023-12-21 | Northvolt Ab | A cylindrical secondary cell |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009152031A (ja) | 2007-12-20 | 2009-07-09 | Panasonic Corp | 円筒形電池 |
JP2010512638A (ja) | 2006-12-11 | 2010-04-22 | エルジー・ケム・リミテッド | 安全性を高めた折り曲げ形状のリチウムイオンバッテリー |
US20190296311A1 (en) * | 2018-03-23 | 2019-09-26 | Sf Motors, Inc. | Battery cell for electric vehicle battery pack |
WO2020111275A1 (ja) * | 2018-11-30 | 2020-06-04 | パナソニックIpマネジメント株式会社 | 電池 |
JP2020518976A (ja) * | 2017-10-10 | 2020-06-25 | エルジー・ケム・リミテッド | 接続キャップを備える円筒状電池セル |
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- 2021-11-15 EP EP21894586.3A patent/EP4250440A1/en active Pending
- 2021-11-15 CN CN202180076531.7A patent/CN116724448A/zh active Pending
- 2021-11-15 JP JP2022563735A patent/JPWO2022107712A1/ja active Pending
- 2021-11-15 US US18/036,460 patent/US20230402727A1/en active Pending
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010512638A (ja) | 2006-12-11 | 2010-04-22 | エルジー・ケム・リミテッド | 安全性を高めた折り曲げ形状のリチウムイオンバッテリー |
JP2009152031A (ja) | 2007-12-20 | 2009-07-09 | Panasonic Corp | 円筒形電池 |
JP2020518976A (ja) * | 2017-10-10 | 2020-06-25 | エルジー・ケム・リミテッド | 接続キャップを備える円筒状電池セル |
US20190296311A1 (en) * | 2018-03-23 | 2019-09-26 | Sf Motors, Inc. | Battery cell for electric vehicle battery pack |
WO2020111275A1 (ja) * | 2018-11-30 | 2020-06-04 | パナソニックIpマネジメント株式会社 | 電池 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023242167A1 (en) * | 2022-06-14 | 2023-12-21 | Northvolt Ab | A cylindrical secondary cell |
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US20230402727A1 (en) | 2023-12-14 |
CN116724448A (zh) | 2023-09-08 |
JPWO2022107712A1 (ja) | 2022-05-27 |
EP4250440A1 (en) | 2023-09-27 |
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