CN116544627A - End cover unit, energy storage device and electric equipment - Google Patents
End cover unit, energy storage device and electric equipment Download PDFInfo
- Publication number
- CN116544627A CN116544627A CN202310772276.0A CN202310772276A CN116544627A CN 116544627 A CN116544627 A CN 116544627A CN 202310772276 A CN202310772276 A CN 202310772276A CN 116544627 A CN116544627 A CN 116544627A
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- Prior art keywords
- cover plate
- groove
- limiting
- electrode
- energy storage
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- 238000004146 energy storage Methods 0.000 title claims abstract description 82
- 230000000670 limiting effect Effects 0.000 claims abstract description 157
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000004308 accommodation Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 18
- 238000001125 extrusion Methods 0.000 abstract description 10
- 230000001174 ascending effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- VVNXEADCOVSAER-UHFFFAOYSA-N lithium sodium Chemical compound [Li].[Na] VVNXEADCOVSAER-UHFFFAOYSA-N 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- 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
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- 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
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- 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
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application discloses an end cover unit, energy storage device and consumer relates to energy storage technical field. The end cap unit includes: a cover plate having a mounting hole; the electrode terminal comprises an electrode column, a sealing ring and a fixing piece, wherein the side wall of the electrode column is provided with a groove, and the first end of the electrode column is provided with a base; the second end of the electrode column passes through the sealing ring and the mounting hole and is fixedly connected with the fixing piece, and the fixing piece fills the groove and is abutted with the surface of the cover plate, which is opposite to the base; at least one limiting piece is arranged on the surface of the cover plate, which is opposite to the base, and part of each limiting piece is positioned in the groove and embedded into the fixing piece. In this embodiment, the part of locating part is located the recess of electrode post to the embedding mounting, so through the part that is located the recess on the locating part realize spacing to the electrode post, reduce the electrode post in the ascending movable space of apron thickness direction, guarantee the base of electrode post and the extrusion degree of apron to the sealing washer, thereby guarantee sealed effect.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to an end cover unit, an energy storage device and electric equipment.
Background
The secondary battery (Rechargeable battery) is also called a rechargeable battery or a storage battery, and is a battery that can be continuously used by activating an active material by charging after discharging the battery. The recyclable characteristic of the secondary battery gradually becomes a main power source of electric equipment, and as the demand of the secondary battery gradually increases, the performance requirements of people on all aspects of the secondary battery are also higher and higher, and particularly the service life of the secondary battery is required.
In the related art, a secondary battery is generally composed of an end cap unit, an electrode assembly, and a case. The actual production process is to manufacture an end cover unit, an electrode assembly and a shell respectively, then use metal adapter to weld electrode posts of the end cover unit and electrode lugs of the electrode assembly respectively, then put the electrode assembly into the shell, and then use the end cover unit to cover an opening of the shell and then weld and seal the shell so as to form a basic structure of the secondary battery. Then, the electrolyte is injected manually through the injection Kong Jiazhu arranged on the top cover, and the injection hole is welded and sealed after the completion.
The end cover unit comprises a cover plate, an electrode column, a sealing ring and an upper plastic, wherein the electrode column penetrates through the sealing ring and the cover plate and is fixedly connected with the upper plastic, a groove is formed in the side wall of the electrode column, and the upper plastic comprises a fixing portion which is injection-molded in the groove. When the electrode column is welded with the electrode assembly, the fixed part in the groove is deformed due to temperature rise of the electrode column, and the electrode column has a movable space facing the electrode assembly, so that the extrusion effect on the sealing ring is reduced, and the sealing effect of the sealing ring is reduced.
Disclosure of Invention
One main object of the present application is to provide an end cover unit, an energy storage device and electric equipment capable of improving the sealing effect of the energy storage device.
In order to achieve the purposes of the application, the application adopts the following technical scheme:
according to one aspect of the present application, there is provided an end cap unit comprising:
a cover plate having a mounting hole;
the electrode terminal comprises an electrode column, a sealing ring and a fixing piece, wherein the side wall of the electrode column is provided with a groove, and the first end of the electrode column is provided with a base;
the second end of the electrode column sequentially penetrates through the sealing ring and the mounting hole and is fixedly connected with the fixing piece, the fixing piece fills the groove and is abutted to the surface, opposite to the base, of the cover plate, and the sealing ring is clamped between the base and the cover plate;
and the at least one limiting piece is arranged on the surface of the cover plate, which is opposite to the base, and part of each limiting piece is positioned in the groove and embedded into the fixing piece.
In the embodiment of the application, the fixed limit of the electrode column on the cover plate is realized through the base and the fixing piece at the first end of the electrode column, and meanwhile, the sealing is realized through the extrusion of the base and the cover plate to the sealing ring; and in the process of sealing the sealing ring, as the fixing part is embedded in the part, which is positioned in the groove, of the limiting part, the limiting of the electrode column can be realized, the movable space of the electrode column in the thickness direction of the cover plate is reduced, the extrusion degree of the base of the electrode column and the cover plate to the sealing ring is ensured, and the sealing effect of the sealing ring is further ensured.
According to an embodiment of the application, the surface of the cover plate, which faces away from the base, is provided with a convex ring surrounding the mounting hole, the limiting piece is located in an area surrounded by the convex ring, and the limiting piece is abutted with the inner annular surface of the convex ring.
In this embodiment, through the setting of bulge loop, the inner ring of accessible bulge loop is to the location of locating part, improves the assembly efficiency of locating part.
According to an embodiment of the application, the mounting hole is a circular through hole, the convex ring is a rectangular ring, and the limiting piece is arranged on the inner side of a corner on at least one diagonal line of the convex ring.
In the embodiment of the application, the limiting piece is arranged on the inner side of the upper corner of the diagonal line of the convex ring, so that the fixed area of the limiting piece on the cover plate is conveniently increased, and the connection strength of the limiting piece and the cover plate is improved; meanwhile, the limiting piece and the cover plate can have larger fixing area, so that when the limiting piece and the cover plate are fixed in a welding mode, the edge far away from the mounting hole can be welded, and the influence of high temperature generated during welding on the sealing ring on the inner side of the cover plate is avoided; in addition, the limiting piece is arranged along the diagonal line of the convex ring, so that the stability of the limiting piece in limiting the electrode column can be ensured, and the situation that the electrode column deflects is avoided.
According to an embodiment of the application, the mounting hole is a circular through hole, the groove is a circular groove, the limiting piece comprises a limiting part located in the circular groove, and the edge of the limiting part, facing the electrode column, is a circular arc edge.
In this embodiment, set up the spacing portion that is located the recess on the locating part have with the circular arc limit of ring groove matching to when the locating part is spacing to the electrode post, can increase the spacing region of locating part to the electrode post, increase the effective holding area of locating part to the electrode post promptly, thereby improve the spacing effect to the electrode post.
According to an embodiment of the application, a central angle of the circular arc edge on the limiting part is greater than or equal to 90 degrees and smaller than 180 degrees.
According to an embodiment of the present application, the limiting piece includes a limiting portion located in the groove and a connecting portion connected with the cover plate, the limiting portion and/or the connecting portion is of an insulating structure, and the limiting portion is in butt joint with a groove bottom of the groove.
In this embodiment, to setting up to insulation system's connecting portion and/or spacing portion, set up the tank bottom butt of locating part and recess, can be under the circumstances of avoiding apron and electrode post electric conduction, increase the spacing region of locating part to the electrode post, increase the effective holding area of locating part to the electrode post promptly to improve the spacing effect to the electrode post.
According to an embodiment of the present application, the limiting portion has a notch penetrating along a thickness direction of the cover plate.
In this embodiment, through set up the breach on spacing portion for under the circumstances of the tank bottom butt of spacing portion and recess, the space of intercommunication recess in the both sides of locating part on the thickness direction of apron, thereby realize the structural integrity of the part of packing in the recess on the mounting, avoid the part of packing in the recess on the mounting to take place cracked possibility as the fracture face with the plane at locating part place, improved the steadiness that the electrode post was fixed on the apron.
According to an embodiment of the present application, the limiting piece is an elastic piece, and the limiting piece includes a limiting portion located in the groove and a connecting portion connected with the cover plate, the limiting portion and/or the connecting portion is an insulating structure, and the limiting portion is in butt joint with the groove wall of the base away from the groove.
In this embodiment, set up spacing portion and recess and keep away from the cell wall butt of base, can avoid the electrode post to exist the condition of activity space in the thickness direction of apron under the circumstances that apron and electrode post electricity switched on to guarantee the base of electrode post and the extrusion of apron to the sealing washer, guarantee the sealed effect of sealing washer.
According to an embodiment of the present application, the orthographic projection of the fixing element on the plane of the cover plate covers the orthographic projection of the limiting element on the plane of the cover plate.
In this embodiment, the mounting can be realized the parcel to the locating part, realizes the fixed of locating part on the one hand to guarantee the spacing reliability of locating part to electrode post, on the other hand can guarantee the aesthetic property of end cover unit.
According to an aspect of the present application, there is provided an energy storage device comprising:
a housing including a receiving chamber having an opening;
an electrode assembly accommodated in the accommodation chamber;
the end cap unit of the above aspect seals the opening of the accommodation chamber.
In this application embodiment, to the energy storage device including the end cover unit of above-mentioned aspect, can guarantee the leakproofness to avoid revealing of electrolyte, and avoid the electrolyte to decompose the condition that causes energy storage device's cycle performance to descend, can also avoid the corruption of casing etc. guarantee energy storage device's security performance.
According to an aspect of the present application, there is provided an electric device, where the electric device includes the energy storage device according to the above aspect, and the energy storage device supplies power to the electric device.
In this embodiment of the application, to the consumer including above-mentioned energy storage device, can improve the stability of consumer work, reduce the probability that the consumer was down, improve the security that the consumer used simultaneously.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic diagram illustrating a configuration of a household energy storage system according to an exemplary embodiment.
Fig. 2 illustrates a schematic structural diagram of an energy storage device according to an embodiment of the present application.
Fig. 3 illustrates a schematic cross-sectional structure of the end cap unit shown in fig. 2 along the O-O line.
Fig. 4 illustrates an enlarged structural schematic view of a partial region of the end cap unit shown in fig. 3.
Fig. 5 illustrates an axial side exploded view of an end cap unit provided in an embodiment of the present application.
Fig. 6 illustrates an axial side structure schematic diagram of an electrode column according to an embodiment of the present application.
Fig. 7 illustrates a schematic cross-sectional structure of another end cap unit provided in an embodiment of the present application along the line O-O shown in fig. 2.
Fig. 8 illustrates an enlarged structural schematic view of a partial region of the end cap unit shown in fig. 7.
Fig. 9 illustrates a schematic cross-sectional structure of a further end cap unit according to an embodiment of the present application along the line O-O shown in fig. 2.
Fig. 10 illustrates an enlarged structural schematic view of a partial region of the end cap unit shown in fig. 9.
Fig. 11 illustrates a schematic structural diagram of connection of a limiting member on a cover plate according to an embodiment of the present application.
Wherein reference numerals are as follows:
100. an energy storage device; 200. an electric energy conversion device; 300. user load;
10. a housing; 20. an electrode assembly; 30. an end cap unit;
11. a receiving chamber;
31. a cover plate; 32. an electrode terminal; 33. a limiting piece; 34. an insulating member;
311. a mounting hole; 312. a convex ring; 313. a slideway;
321. an electrode column; 322. a seal ring; 323. a fixing member;
3211. a groove; 3212. a base; 3213. a groove bottom;
331. a limit part; 332. a connection part; 333. and (5) a notch.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Because of the strong timeliness and space properties of energy sources required by people, in order to reasonably utilize the energy sources and improve the utilization rate of the energy, one energy form needs to be stored by one medium or equipment and then is converted into another energy form, and then is released in a specific energy form based on future application requirements. As is well known, to achieve the great goal of carbon neutralization, green energy is currently mainly used to replace fossil energy so as to achieve the purpose of generating green electric energy.
The existing green energy mainly comprises light energy, wind energy, water potential and the like, and the problems of strong intermittence and large fluctuation of the light energy, the wind energy and the like generally exist, so that the voltage of a green power grid is unstable (insufficient electricity is used in a peak and too much electricity is used in a valley), and the unstable voltage can cause damage to the electric power.
To solve the problem of insufficient power demand or insufficient power grid acceptance, an energy storage device must be relied on. The energy storage device converts the electric energy into other forms of energy through physical or chemical means to store the energy, the energy stored by the energy storage device is converted into the electric energy to be released when needed, in short, the energy storage device is similar to a large-scale 'charge pal', when the light energy and the wind energy are sufficient, the electric energy is stored, and the stored electric energy is released when needed.
The existing energy storage (i.e. energy storage) application scene is wider, including aspects such as power generation side energy storage, electric network side energy storage, renewable energy grid-connected energy storage, user side energy storage and the like, the types of corresponding energy storage devices include:
(1) The large energy storage container applied to the energy storage scene at the power grid side can be used as a high-quality active and reactive power regulation power supply in the power grid, so that the load matching of electric energy in time and space is realized, the renewable energy consumption capability is enhanced, and the large energy storage container has great significance in the aspects of standby of a power grid system, relieving peak load power supply pressure and peak regulation and frequency modulation;
(2) The main operation modes of the small and medium-sized energy storage electric cabinet applied to the industrial and commercial energy storage scenes (banks, shops and the like) at the user side and the household small-sized energy storage box applied to the household energy storage scene at the user side are peak clipping and valley filling. Because of the large price difference of the electricity charge at the peak-valley position according to the electricity consumption requirement, after the energy storage equipment is arranged by a user, in order to reduce the cost, the energy storage cabinet/box is charged usually in the electricity price valley period; and in the peak period of electricity price, the electricity in the energy storage equipment is released for use, so that the purpose of saving electricity charge is achieved. In addition, in remote areas and areas with high occurrence of natural disasters such as earthquake, hurricane and the like, the household energy storage device is equivalent to the fact that a user provides a standby power supply for the user and the power grid, and inconvenience caused by frequent power failure due to disasters or other reasons is avoided.
Taking a household energy storage scenario in a user side energy storage as an example, fig. 1 shows a household energy storage system, where the household energy storage system includes an energy storage device 100 and an electric energy conversion device 200 (such as a photovoltaic panel), and a user load 300 (such as a street lamp, a household appliance, etc.), and the energy storage device 100 is a small energy storage box, and may be installed on an outdoor wall by a wall hanging manner. Specifically, the power conversion device 200 may convert solar energy into electric energy during the low electricity price period, and store the electric energy by the energy storage device 100, and then supply the electric energy to the consumer load 300 for use during the peak electricity price period, or supply the electric energy to the consumer load 300 for use during the power outage/power failure period of the power grid.
In combination with the above-mentioned case of performing energy storage by physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage device 100 includes at least one group of chemical batteries, and chemical elements in the chemical batteries are used as an energy storage medium, so as to implement a charging and discharging process through chemical reaction or change of the energy storage medium. In short, the electric energy generated by light energy and wind energy is stored in at least one group of chemical batteries through chemical reaction or change of the energy storage medium, and when the use of external electric energy reaches a peak, the electric quantity stored in at least one group of chemical batteries is released for use through the chemical reaction or change of the energy storage medium, or is transferred to a place where the electric quantity is short for use.
The present embodiment provides an energy storage device 100, and the energy storage device 100 may be, but is not limited to, a battery cell (secondary battery), a battery module composed of battery cells, a battery pack, a battery system, or the like. The single battery may be a lithium ion battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, and the single battery may be a cylinder, a flat body, a cuboid, or the like, which is not limited in the embodiment of the present application.
Next, the energy storage device 100 is taken as an example of a square battery cell, and the energy storage device 100 will be explained in detail. Fig. 2 illustrates a schematic structural diagram of an energy storage device 100 according to an embodiment of the present application. As shown in fig. 2, the energy storage device 100 includes: a case 10, an electrode assembly 20, and an end cap unit 30, the case 10 including a receiving chamber 11 having an opening; the electrode assembly 20 is accommodated in the accommodating chamber 11; the end cap unit 30 seals the opening of the accommodation chamber 11.
Wherein the housing 10 may have a cylindrical structure with one end opened, and the energy storage device 100 includes an end cap unit 30 to be capable of sealing one opening of the housing 10; of course, the housing 10 may have a cylindrical structure with two open ends, and the energy storage device 100 may include one end cap unit 30 and one cover plate 31, or include two end cap units 30, such that one end cap unit 30 and one cover plate 31, or the two end cap units 30 may be capable of sealing two openings of the housing 10, respectively.
The end cap unit 30 includes a cap plate 31 and an electrode terminal 32 (including a positive electrode terminal and a negative electrode terminal), wherein the electrode terminal 32 is disposed on the end cap body in a penetrating manner, and one end of the electrode terminal is connected to the electrode assembly 20, and the other end of the electrode terminal is exposed outside the case 10, so as to serve as an output end of the energy storage device 100; the cover plate 31 is provided with an explosion-proof valve and/or a liquid injection hole, the explosion-proof valve is used for discharging the gas in the accommodating cavity 11 to improve the use safety of the energy storage device 100, and the liquid injection hole is used for injecting electrolyte into the accommodating cavity 11 to ensure the normal use of the energy storage device 100.
As shown in fig. 3 and fig. 4, the electrode terminal 32 includes an electrode post 321, a sealing ring 322 and a fixing member 323, the cover plate 31 is provided with a mounting hole 311, a first end of the electrode post 321 is provided with a base 3212, a side wall of the electrode post 321 is provided with a groove 3211, a second end of the electrode post 321 sequentially passes through the sealing ring 322 and the mounting hole 311 and is fixedly connected with the fixing member 323, the fixing member 323 fills the groove 3211 and is abutted to the surface of the cover plate 31 opposite to the base 3212, the base 3212 is limited at the inner side of the cover plate 31, and the sealing ring 322 is clamped between the base 3212 and the cover plate 31. In this way, the electrode post 321 is fixed on the cover plate 31 by the cooperation of the base 3212 and the fixing piece 323, and meanwhile, the sealing effect of the sealing ring 322 on the gap between the base 3212 and the cover plate 31 is ensured by the extrusion of the base 3212 and the cover plate 31 to the sealing ring 322.
The electrode assembly 20 includes a positive plate, a negative plate, and a separator, where the separator is located between the positive plate and the negative plate, and the ends of the positive plate and the negative plate have tabs to form positive tabs and negative tabs of the energy storage device 100. The positive electrode lug and the negative electrode lug are positioned at the same end of the electrode assembly 20, and are respectively connected with the electrode post 321 included in the positive electrode terminal and the electrode post 321 included in the negative electrode terminal so as to realize the output of electric energy of the electrode assembly 20 through the two electrode posts 321.
It should be noted that, the energy storage device 100 further includes two metal adapters, and the connection between the positive electrode tab and the electrode post 321 included in the positive electrode terminal of the electrode assembly 20 may be achieved through one metal adapter, and the connection between the negative electrode tab and the electrode post 321 included in the negative electrode terminal of the electrode assembly 20 may be achieved through another metal adapter.
In the related art, the high temperature generated when the electrode post 321 is welded to the metal adapter easily causes the shrinkage deformation of the portion of the fixing piece 323 filled in the groove 3211 on the electrode post 321, resulting in the electrode post 321 having a movable space toward the electrode assembly 20; in addition, when the plurality of energy storage devices 100 are connected in series and parallel by using aluminum bars, high temperature is generated when the aluminum bars are welded to the electrode posts 321 of the energy storage devices 100, so that the fixing members 323 are easily deformed by shrinkage of the portions of the grooves 3211 filled in the electrode posts 321, and the electrode posts 321 have a movable space toward the electrode assembly 20. In this way, after the distance between the base 3212 of the electrode post 321 and the cover plate 31 is increased, the extrusion effect on the sealing ring 322 is reduced, so that the sealing performance of the sealing ring 322 is reduced, and then the electrolyte in the accommodating cavity 11 of the housing 10 is easily leaked, and meanwhile, the outside air also easily enters the accommodating cavity 11 to decompose the electrolyte, so that the circulation performance of the energy storage device 100 is reduced, even the housing 10 is corroded, and potential safety hazards are brought.
The embodiment of the application provides an end cover unit 30 including a limiting member 33, and based on the end cover unit 30, the sealing effect of a sealing ring 322 can be ensured, so that for the energy storage device 100 including the end cover unit 30, leakage of electrolyte can be avoided, and the condition that the electrolyte is decomposed to cause the cycle performance of the energy storage device 100 to be reduced can be avoided, corrosion of a shell 10 can be avoided, and the safety performance of the energy storage device 100 can be ensured.
As shown in fig. 3 and 4, the end cap unit 30 includes: the cover plate 31, the electrode terminal 32 and the at least one limiting piece 33, wherein the cover plate 31 is provided with a mounting hole 311, the electrode terminal 32 comprises an electrode post 321, a sealing ring 322 and a fixing piece 323, a groove 3211 is formed in the side wall of the electrode post 321, and a base 3212 is formed at the first end of the electrode post 321; the second end of the electrode post 321 sequentially passes through the sealing ring 322 and the mounting hole 311 and is fixedly connected with the fixing piece 323, the fixing piece 323 fills the groove 3211 and is abutted with the surface of the cover plate 31, which is opposite to the base 3212, and the sealing ring 322 is clamped between the base 3212 and the cover plate 31; at least one limiting member 33 is disposed on a surface of the cover plate 31 facing away from the base 3212, and a portion of each limiting member 33 is disposed in the groove 3211 and is embedded in the fixing member 323.
In the embodiment of the application, the fixing and limiting of the electrode post 321 on the cover plate 31 are realized through the base 3212 and the fixing piece 323 at the first end of the electrode post 321, and meanwhile, the sealing is realized through the extrusion of the base 3212 and the cover plate 31 to the sealing ring 322; in the process of sealing the sealing ring 322, as the part of the limiting piece 33 is positioned in the groove 3211 of the electrode post 321 and is embedded into the part of the fixing piece 323 filled in the groove 3211, the part of the fixing piece 323 filled in the groove 3211 can be separated in the thickness direction of the cover plate 31 through the limiting piece 33, so that the contraction deformation of the part of the fixing piece 323 only positioned between the limiting piece 33 and the groove wall of the groove 3211 opposite to the base 3212 can affect the movable space of the electrode post 321 in the thickness direction of the cover plate 31, the movable space of the electrode post 321 in the thickness direction of the cover plate 31 is reduced, the extrusion effect of the base 3212 of the electrode post 321 and the cover plate 31 on the sealing ring 322 is ensured, and the sealing effect of the sealing ring 322 is ensured.
As shown in fig. 3 and 4, the end cap unit 30 further includes an insulating member 34, the insulating member 34 is disposed on a side of the cover plate 31 facing away from the fixing member 323 (i.e., for the energy storage device 100, the insulating member 34 is disposed on a side of the cover plate 31 facing toward the electrode assembly 20), the electrode post 321 penetrates through the insulating member 34, and then sequentially penetrates through the sealing ring 322 and the mounting hole 311 on the cover plate 31 to be fixedly connected with the fixing member 323, and the base 3212 of the electrode post 321 is limited on a side of the insulating member 34 facing away from the cover plate 31.
Alternatively, the front projection of the fixing member 323 on the plane of the cover plate 31 covers the front projection of the limiting member 33 on the plane of the cover plate 31, that is, as shown in fig. 4, the fixing member 323 completely covers the limiting member 33. In this way, the fixing member 323 can compress the limiting member 33, so as to ensure the stability of fixing the limiting member 33 on the cover plate 31, and simultaneously ensure the aesthetic property of the end cap unit 30.
In this embodiment, as shown in fig. 5, the mounting hole 311 on the cover plate 31 may be a circular through hole, where the shaft of the electrode post 321 (i.e. the portion excluding the base 3212) has a cylindrical structure; of course, the mounting hole 311 on the cover plate 31 may be a polygonal through hole (such as a square through hole), and the shaft of the electrode post 321 is in a polygonal prism structure.
The groove 3211 provided in the side wall of the electrode post 321 may be an annular groove wound around the electrode post 321 in one turn in the circumferential direction as shown in fig. 6, or may be a plurality of circular arc grooves distributed at intervals in the circumferential direction of the electrode post 321, which is not limited in the embodiment of the present application.
In this embodiment, the limiting member 33 includes a limiting portion 331 located in the groove 3211 and a connecting portion 332 connected to the cover plate 31, when the limiting portion 331 extends into the groove 3211 to limit the electrode post 321, the limiting portion 331 may not contact with the groove wall or the groove bottom 3213 of the groove 3211, or may contact with the groove bottom 3213 of the groove 3211 or the groove wall opposite to the base 3212.
For example, as shown in fig. 4, a certain gap exists between the limiting portion 331 of the limiting member 33 and the groove wall and groove bottom 3213 of the groove 3211; or as shown in fig. 7 and 8, the limiting portion 331 of the limiting member 33 abuts against the groove bottom 3213 of the groove 3211; as shown in fig. 9 and 10, the stopper 331 of the stopper 33 abuts against the groove wall of the groove 3211 away from the base 3212.
It should be noted that, when the limiting portion 331 of the limiting member 33 is not in contact with the groove wall or the groove bottom 3213 of the groove 3211, the limiting member 33 may be a structural member made of a material with a certain rigidity, such as a metal material, so as to avoid the limiting effect of the limiting member 33 on the electrode post 321 after the limiting portion 331 is bent and deformed due to stress when the limiting portion 331 limits the electrode post 321.
When the limiting portion 331 of the limiting member 33 contacts with the groove bottom 3213 of the groove 3211 or the groove wall facing away from the base 3212, in order to avoid the limiting member 33 from electrically conducting the cover plate 31 and the electrode post 321, one of the limiting portion 331 and/or the connecting portion 332 is of an insulating structure. At this time, the stopper 33 may include a body structure made of a material having a certain rigidity such as a metal material, and an insulating layer coated on a surface of the body structure to form the stopper 331 and/or the connecting portion 332 of the insulating structure through the insulating layer. Of course, the stopper 33 may be directly made of an insulating material having a certain rigidity, which is not limited in the embodiment of the present application.
In view of the above, as shown in fig. 4, the two groove walls of the limiting portion 331 of the limiting member 33 opposite to the groove 3211 in the thickness direction of the cover plate 31 are spaced, and at this time, when the electrode post 321 and the metal adaptor are welded, only the portion of the fixing member 323 located between the limiting member 33 and the groove wall of the groove 3211 facing away from the base 3212 is deformed by shrinkage, which affects the movable space of the electrode post 321 in the thickness direction of the cover plate 31. In this way, after the electrode post 321 is welded with the metal adaptor, the influence on the movable space of the electrode post 321 in the thickness direction of the cover plate 31 can be reduced, so that the extrusion effect of the base 3212 of the electrode post 321 and the cover plate 31 on the sealing ring 322 is ensured, and the sealing effect of the sealing ring 322 is ensured.
As shown in fig. 7 and 8, the limiting portion 331 of the limiting member 33 abuts against the groove bottom 3213 of the groove 3211, and at this time, the area of the limiting portion 331 located in the groove 3211 can be increased, so that the limiting area of the limiting portion 331 to the electrode post 321, that is, the effective supporting area of the limiting member 33 to the electrode post 321 is increased, and the limiting effect on the electrode post 321 is improved.
In order to avoid the spacing portion 331 from forming a partition between the portions of the fixing member 323 filled in the groove 3211 in the thickness direction of the cover plate 31 when the spacing portion 331 of the spacing member 33 abuts against the groove bottom 3213 of the groove 3211, the spacing portion 331 of the spacing member 33 may have a notch 333 penetrating in the thickness direction of the cover plate 31, as shown in fig. 8. In this way, through the arrangement of the notch 333, under the condition that the limiting part 331 is abutted against the groove bottom 3213 of the groove 3211, the space of the groove 3211 at two sides of the limiting part 33 is communicated in the thickness direction of the cover plate 31, so that the structural integrity of the part, filled in the groove 3211, of the fixing part 323 is realized, the possibility that the part, filled in the groove 3211, of the fixing part 323 is broken by taking the plane of the limiting part 33 as a fracture surface is avoided, and the stability of fixing the electrode post 321 on the cover plate 31 is improved.
The notch 333 provided in the limiting portion 331 may be a through hole penetrating the limiting portion 331, or may be a notch 333 located at an edge, as long as the groove 3211 can be communicated with the spaces on both sides of the limiting member 33 in the thickness direction of the cover plate 31, which is not limited in the embodiment of the present application.
As shown in fig. 9 and 10, a portion of the stopper 33 extending into the groove 3211 abuts against a groove wall of the groove 3211 facing away from the base 3212 in the thickness direction of the cover 31, and at this time, when the electrode post 321 and the metal adaptor are welded, a portion of the fixing member 323 filled in the groove 3211 is shrunk and deformed, but due to the abutting of the stopper 33 and the groove wall of the groove 3211 facing away from the base 3212, a movable space is not formed in the thickness direction of the cover 31 by the electrode post 321. In this way, after the electrode post 321 is welded with the metal adaptor, the situation that a movable space exists in the thickness direction of the cover plate 31 for the electrode post 321 can be avoided, so that the base 3212 of the electrode post 321 and the cover plate 31 squeeze the sealing ring 322, and the sealing effect of the sealing ring 322 is ensured.
In order to avoid the spacing portion 331 from forming a partition to the portion of the fixing member 323 filled in the groove 3211 in the thickness direction of the cover plate 31 when the spacing portion 331 of the spacing member 33 abuts against the groove wall of the groove 3211 away from the base 3212, the spacing portion 331 of the spacing member 33 may have a notch 333 penetrating along the thickness direction of the cover plate 31. The notch 333 provided on the limiting portion 331 may refer to the above-mentioned case that the limiting portion 331 of the limiting member 33 abuts against the groove bottom 3213 of the groove 3211, which is not described in detail in this embodiment.
In this embodiment, since the limiting portion 331 of the limiting member 33 needs to extend into the groove 3211 on the electrode post 321, when the end cap unit 30 is assembled, the second end of the electrode post 321 may sequentially pass through the sealing ring 322 and the mounting hole 311, and then the limiting member 33 is disposed, so that the limiting portion 331 of the limiting member 33 is located in the groove 3211.
In the present embodiment, the number of the stoppers 33 may be one or a plurality. In the case where the end cap unit 30 includes a plurality of stoppers 33, the plurality of stoppers 33 are distributed at the periphery of the mounting hole 311 and are uniformly distributed along the circumferential direction of the mounting hole 311. In this way, the portions of the plurality of uniformly distributed limiting members 33 extending into the grooves 3211 can ensure stable limiting of the electrode columns 321 in the thickness direction of the cover plate 31, and avoid the deflection of the electrode columns 321.
The limiting member 33 may have a strip structure, where one end or one side of the limiting member 33 is located in the groove 3211, and limits the electrode post 321 in the thickness direction of the cover 31; alternatively, as shown in fig. 5, the stopper 33 has a sheet-like structure, and at this time, a part of the edge portion of the stopper 33 is positioned in the groove 3211, and the electrode post 321 is limited in the thickness direction of the cap plate 31.
For the spacing piece 33 with the strip structure, optionally, the mounting hole 311 is a polygonal through hole, the groove 3211 on the electrode post 321 is a polygonal annular groove, at this time, the length direction of the spacing piece 33 is perpendicular to one side of the mounting hole 311, and one end of the spacing piece 33 stretches into the groove 3211 to limit the electrode post 321, so that the connection area of the spacing piece 33 and the cover plate 31 can be increased, the stability of the connection of the spacing piece 33 on the cover plate 31 is improved, and then the connection area of the spacing piece 33 on the cover plate 31 is larger than the limit area of the electrode post 321, so that the limit effect of the spacing piece 33 on the electrode post 321 can be effectively ensured.
Alternatively, as shown in fig. 5 and 6, for the limiting member 33 with a sheet structure, the mounting hole 311 is a circular through hole, the groove 3211 on the electrode post 321 is a circular groove, and the edge of the limiting member 33 facing the electrode post 321 is a circular arc edge. The limiting area of the limiting part 331 to the electrode post 321 can be increased, namely the effective supporting area of the limiting piece 33 to the electrode post 321 is increased, so that the limiting effect to the electrode post 321 is improved.
Optionally, the central angle of the circular arc edge on the limiting part 331 is greater than or equal to 90 degrees and less than 180 degrees. For example, the central angle of the circular arc edge on the limiting portion 331 is 90 degrees, 120 degrees, 150 degrees, 175 degrees, specifically, may be set according to the number of limiting members 33 set on the outer surface of the cover plate 31, which is not limited in the embodiment of the present application. As an example, as shown in fig. 5, the outer surface of the cap plate 31 is provided with two stoppers 33 uniformly distributed along the circumferential direction of the mounting hole 311, and the stopper 331 of each stopper 33 has an arc edge toward the edge of the electrode post 321, and the central angle of the arc edge is 90 degrees.
In the present embodiment, the limiting member 33 may be directly fixedly connected to the outer surface of the cover plate 31, and may, of course, be slidably connected to the outer surface of the cover plate 31.
For the condition that the limiting piece 33 is fixedly connected with the cover plate 31, in order to ensure that the limiting part 331 of the limiting piece 33 can extend into the groove 3211 on the electrode post 321, the limiting piece 33 can only pass through the mounting hole 311 on the cover plate 31 after the electrode post 321 and at least part of the groove 3211 on the electrode post 321 protrudes out of the surface of the cover plate 31, which is opposite to the base plate 3212, and then extend into the groove 3211 and fixedly connected with the cover plate 31, so that the stability of the limiting piece 33 can be ensured.
For the slidable connection between the limiting member 33 and the cover plate 31, the limiting member 33 may be disposed on the outer surface of the cover plate 31 in advance, and the limiting member 33 is slid to avoid the mounting hole 311, after the electrode post 321 passes through the mounting hole 311 on the cover plate 31, and at least part of the groove 3211 on the electrode post 321 protrudes out of the surface of the cover plate 31 opposite to the base 3212, the limiting member 33 is slid to make the limiting portion 331 of the limiting member 33 extend into the groove 3211, so that the process of fixing the limiting member 33 in the process of assembling the end cover unit 30 is avoided, and thus the assembly efficiency of the end cover unit 30 is improved.
For the fixed connection between the limiting member 33 and the cover plate 31, the limiting member 33 may be fixedly connected with the cover plate 31 by welding, bonding, or the like, and for the slidable connection between the limiting member 33 and the cover plate 31, as shown in fig. 11, a slide way 313 (such as a chute) is disposed on the outer surface of the cover plate 31, and the limiting member 33 is slidably limited on the slide way 313.
In some embodiments, in the case where the limiting member 33 is fixedly connected to the cover plate 31, as shown in fig. 5, a surface of the cover plate 31 facing away from the base 3212 is provided with a convex ring 312 surrounding the mounting hole 311, the limiting member 33 is located in an area surrounded by the convex ring 312, and the limiting member 33 abuts against an inner ring surface of the convex ring 312. Thus, through the arrangement of the convex ring 312, the positioning of the limiting piece 33 can be realized under the limiting action of the inner annular surface of the convex ring 312, thereby being convenient for improving the assembly efficiency of the limiting piece 33.
Alternatively, as shown in fig. 5, the mounting hole 311 is a circular through hole, the collar 312 is a rectangular ring, and a stopper 33 is provided inside a corner on at least one diagonal of the collar 312. In this way, the limiting piece 33 is arranged on the inner sides of the two corners on the diagonal line of the convex ring 312, so that the fixing area of the limiting piece 33 on the cover plate 31 is conveniently increased, and the connection strength of the limiting piece 33 and the cover plate 31 is improved; meanwhile, since the limiting piece 33 and the cover plate 31 can have larger fixing area, when the limiting piece 33 and the cover plate 31 are fixed in a welding mode, the edge far away from the mounting hole 311 can be welded, so that the influence of high temperature generated during welding on the sealing ring 322 on the inner side of the cover plate 31 is avoided. For example, as shown in fig. 5, stoppers 33 may be provided respectively inside two corners on one diagonal line of the convex ring 312.
In other embodiments, for the case that the limiting member 33 is slidably connected to the outer surface of the cover plate 31, the cover plate 31 has a rectangular structure, and at this time, as shown in fig. 11, the orthographic projection of the limiting member 33 on the cover plate 31 is located between the center of the mounting hole 311 and the wide side of the cover plate 31, and the sliding direction of the limiting member 33 is parallel to the long side of the cover plate 31; alternatively, the orthographic projection of the limiting piece 33 on the cover plate 31 is located between the center of the mounting hole 311 and the long side of the cover plate 31, and the sliding direction of the limiting piece 33 is parallel to the wide side of the cover plate 31.
In this way, for the cover plate 31 with a rectangular structure, the position and the sliding direction of the limiting piece 33 are set, so that the distance between the limiting piece 33 and the mounting hole 311 is shortened, the distance that the limiting piece 33 needs to slide when the limiting piece 33 stretches into the groove 3211 of the electrode post 321 is shortened, and the assembly efficiency of the end cover unit 30 is improved; in addition, in combination with the above-described case where the fixing member 323 is projected forward on the cover plate 31 to cover the forward projection of the stopper 33 on the cover plate 31, the slideway 313 corresponding to the stopper 33 can be effectively covered by the fixing member 323, thereby ensuring the aesthetic degree of the end cap unit 30.
The embodiment of the application also provides electric equipment which can be energy storage equipment, vehicles, energy storage containers and the like. The electric equipment comprises the energy storage device 100 in the embodiment, and the energy storage device 100 supplies power for the electric equipment. Thus, for the electric equipment comprising the energy storage device 100, the working stability of the electric equipment can be improved, the downtime probability of the electric equipment is reduced, and the use safety of the electric equipment is improved.
In the examples of the application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the examples of application will be understood by those of ordinary skill in the art as the case may be.
In the description of the application embodiments, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the application embodiments and simplifying the description, and do not indicate or imply that the devices or units to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the application embodiments.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an application embodiment. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the application embodiment, and is not intended to limit the application embodiment, and various modifications and changes may be made to the application embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the application should be included in the protection scope of the embodiments of the application.
Claims (11)
1. An end cap unit (30), characterized by comprising:
a cover plate (31) having a mounting hole (311);
an electrode terminal (32) comprising an electrode post (321), a sealing ring (322) and a fixing piece (323), wherein a groove (3211) is formed in the side wall of the electrode post (321), and a base (3212) is formed at the first end of the electrode post (321);
the second end of the electrode post (321) sequentially passes through the sealing ring (322) and the mounting hole (311) and is fixedly connected with the fixing piece (323), the fixing piece (323) fills the groove (3211) and is abutted with the surface of the cover plate (31) opposite to the base (3212), and the sealing ring (322) is clamped between the base (3212) and the cover plate (31);
and at least one limiting piece (33) is arranged on the surface of the cover plate (31) facing away from the base (3212), and part of each limiting piece (33) is positioned in the groove (3211) and embedded into the fixing piece (323).
2. The end cap unit (30) according to claim 1, wherein a surface of the cover plate (31) facing away from the base (3212) is provided with a collar (312) surrounding the mounting hole (311), the stopper (33) is located in an area surrounded by the collar (312), and the stopper (33) abuts against an inner circumferential surface of the collar (312).
3. End cap unit (30) according to claim 2, wherein the mounting hole (311) is a circular through hole, the collar (312) is a rectangular ring, and the limiting member (33) is provided inside a corner on at least one diagonal of the collar (312).
4. A cap unit (30) according to any one of claims 1-3, wherein the mounting hole (311) is a circular through hole, the recess (3211) is a circular groove, the limiting member (33) comprises a limiting portion (331) located in the circular groove, and an edge of the limiting portion (331) facing the electrode post (321) is a circular arc edge.
5. The end cap unit (30) according to claim 4, wherein the central angle of the circular arc edge on the limiting portion (331) is greater than or equal to 90 degrees and less than 180 degrees.
6. A cap unit (30) according to any one of claims 1-3, wherein the limiting member (33) comprises a limiting portion (331) located in the groove (3211) and a connecting portion (332) connected to the cover plate (31), wherein the limiting portion (331) and/or the connecting portion (332) is of an insulating structure, and wherein the limiting portion (331) abuts against a groove bottom (3213) of the groove (3211).
7. End cap unit (30) according to claim 6, wherein the limit portion (331) has a notch (333) penetrating in the thickness direction of the cover plate (31).
8. A cap unit (30) according to any one of claims 1-3, wherein the limiting element (33) is an elastic sheet, and the limiting element (33) comprises a limiting portion (331) located in the groove (3211) and a connecting portion (332) connected with the cover plate (31), wherein the limiting portion (331) and/or the connecting portion (332) is of an insulating structure, and the limiting portion (331) abuts against a groove wall of the groove (3211) away from the base (3212).
9. An end cap unit (30) according to any one of claims 1-3, wherein the orthographic projection of the fixing element (323) on the plane of the cover plate (31) covers the orthographic projection of the limiting element (33) on the plane of the cover plate (31).
10. An energy storage device (100), comprising:
a housing (10) comprising a receiving chamber (11) having an opening;
an electrode assembly (20) accommodated in the accommodation chamber (11);
the end cap unit (30) of any of claims 1-9, sealing the opening of the receiving chamber (11).
11. A powered device, characterized in that it comprises an energy storage device (100) as claimed in claim 10, said energy storage device (100) powering said powered device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772276.0A CN116544627B (en) | 2023-06-28 | 2023-06-28 | End cover unit, energy storage device and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310772276.0A CN116544627B (en) | 2023-06-28 | 2023-06-28 | End cover unit, energy storage device and electric equipment |
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| CN116544627A true CN116544627A (en) | 2023-08-04 |
| CN116544627B CN116544627B (en) | 2024-01-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117855708A (en) * | 2024-03-05 | 2024-04-09 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN117855708B (en) * | 2024-03-05 | 2024-05-28 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
| CN118610030A (en) * | 2024-08-05 | 2024-09-06 | 数邦电力科技有限公司 | Insulating cylinder, voltage sensor, energy taking device and pole-mounted circuit breaker |
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| CN116544627B (en) | 2024-01-23 |
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