CN217788572U - Cap assembly, battery module, battery pack and vehicle - Google Patents

Cap assembly, battery module, battery pack and vehicle Download PDF

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Publication number
CN217788572U
CN217788572U CN202221650564.6U CN202221650564U CN217788572U CN 217788572 U CN217788572 U CN 217788572U CN 202221650564 U CN202221650564 U CN 202221650564U CN 217788572 U CN217788572 U CN 217788572U
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CN
China
Prior art keywords
battery
cap assembly
explosion
cover plate
electric core
Prior art date
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Active
Application number
CN202221650564.6U
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Chinese (zh)
Inventor
吴迪
李开波
何巍
刘金成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Eve Power Co Ltd
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Hubei Eve Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Eve Power Co Ltd filed Critical Hubei Eve Power Co Ltd
Priority to CN202221650564.6U priority Critical patent/CN217788572U/en
Priority to PCT/CN2022/126164 priority patent/WO2024000933A1/en
Application granted granted Critical
Publication of CN217788572U publication Critical patent/CN217788572U/en
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    • 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 of a single cell or a single battery
    • H01M50/147—Lids or covers
    • 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 of a single cell or a single battery
    • 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 of a single cell or a single battery
    • 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
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • 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

Abstract

The utility model discloses a block subassembly, battery module, battery package and vehicle relates to battery technology field. The cap subassembly package is used for the battery, the battery includes electric core and is used for holding the casing of electric core, the cap subassembly includes converge dish and apron, converge the dish and set up in the casing, just converge the dish laminating be in the top of electric core with the first utmost point ear of electric core is connected, the apron sets up the bottom of casing and with the second utmost point ear of electric core is connected, be provided with weld part and explosion-proof valve on the apron, the weld part for the apron is along being close to the direction protrusion of electric core, explosion-proof valve for the apron is along keeping away from the direction protrusion of electric core. The utility model discloses can realize being connected stable while guaranteeing the radiating effect to electric core with electric core, prolong the life of battery.

Description

Cap assembly, battery module, battery pack and vehicle
Technical Field
The utility model relates to a battery technology field especially relates to a block subassembly, battery module, battery package and vehicle.
Background
The battery wide application is in the life, and traditional battery mainly includes electric core, battery casing and block subassembly, and electric core is put into in the battery casing and is bent with the utmost point ear of electric core and put together the back and be connected with the block subassembly to realize the electricity of block subassembly and electric core and seal battery casing, nevertheless present block subassembly can't guarantee to be connected the radiating effect of stable assurance to electric core with electric core utmost point ear.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a block subassembly can realize being connected the radiating effect of guaranteeing to electric core when stable with electric core, prolongs the life of battery.
For realizing the above technical effect, the technical scheme of the utility model as follows:
a cap assembly for a battery including a cell and a housing for housing the cell, the cap assembly comprising:
the current collecting disc is arranged in the shell and is attached to the top end of the battery cell to be connected with a first pole lug of the battery cell;
the cover plate is arranged at the bottom end of the shell and connected with a second pole lug of the battery cell, a welding portion and an explosion-proof valve are arranged on the cover plate, the welding portion protrudes relative to the cover plate along the direction close to the battery cell, and the explosion-proof valve protrudes relative to the cover plate along the direction far away from the battery cell.
As an alternative of the cap assembly, the explosion-proof valve is provided in plurality, and the plurality of explosion-proof valves are respectively arranged around the cover plate.
As an alternative to the cap assembly, the welded portion is provided in plurality, and a plurality of the welded portions are annularly provided on the cap plate.
As an alternative to the cap assembly, the welds and the explosion-proof valve are staggered.
As an alternative to the cap assembly, the weld is arc-shaped, and the maximum major arc length of the weld is greater than one-half of the cell radius.
As an alternative to the cap assembly, the maximum width of the explosion-proof valve is less than half the radius of the housing.
A second object of the utility model is to provide a battery, through using foretell cap subassembly, can realize being connected the radiating effect of guaranteeing to electric core when stable with electric core, prolong the life of battery.
For realizing the technical effect, the technical scheme of the utility model as follows:
a battery comprises a battery core, a shell and the cap assembly, wherein the shell is used for accommodating the battery core, and the cap assembly is respectively connected with the battery core and the shell.
The utility model discloses a third aim at provides a battery module, through using foretell battery, improves the resistance to pressure of whole battery, guarantees structural stability, prolongs the life of battery.
For realizing the above technical effect, the technical scheme of the utility model as follows:
a battery module comprises a plurality of batteries as described above, and the plurality of batteries are arranged in a plurality of rows and a plurality of columns.
A fourth object of the utility model is to provide a battery pack, through using foretell battery module, can realize being connected the radiating effect of guaranteeing to electric core when stable with electric core, prolong the life of battery.
For realizing the above technical effect, the technical scheme of the utility model as follows:
a battery pack comprises a box body and a battery module, wherein the battery module is arranged in the box body.
The utility model discloses a fifth aim at provides a vehicle, through using foretell battery package, can realize being connected the radiating effect of guaranteeing to electric core when stable with electric core, prolongs the life of battery.
For realizing the above technical effect, the technical scheme of the utility model as follows:
a vehicle includes a vehicle body and the battery pack as described above, the battery pack being provided in the vehicle body.
The utility model has the advantages that: the utility model provides a block subassembly, battery module, battery package and vehicle because the weld part is for the apron along the direction protrusion near electric core, and explosion-proof valve is for the apron along the direction protrusion of keeping away from electric core, and the top surface of apron and the bottom surface of second utmost point ear have distance h promptly 1 The bottom surface of the explosion-proof valve and the bottom surface of the second pole lug have a distance h 2 Thus, it can know h 2 ＞h 1 Is greater than 0, so can pass through h 1 To absorb the acting force h generated when the cell expands 2 And h 1 The height difference between the two can be used for collecting blasting gas, the cover plate and the second pole lug are ensured to be connected stably, spontaneous combustion and explosion of the battery due to overlarge internal pressure are avoided, and the safety of the battery is improved. The utility model discloses simple structure, easy dismounting can realize being connected the stable radiating effect of guaranteeing to electric core when with electric core, prolongs the life of battery.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery according to an embodiment of the present invention in an explosion state;
fig. 4 is a cross-sectional view of a battery according to an embodiment of the present invention;
FIG. 5 is an enlarged partial schematic view of FIG. 4 at A;
FIG. 6 is a schematic view of a portion of the enlarged structure at B in FIG. 4;
fig. 7 is a bottom view of a battery according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 7;
FIG. 9 is an enlarged partial schematic view of FIG. 8 at D;
fig. 10 is a bottom view of another battery according to an embodiment of the present invention;
FIG. 11 is a schematic view of the cross-sectional structure in the direction E-E of FIG. 10;
fig. 12 is a partially enlarged schematic view of a structure at F in fig. 11.
Reference numerals are as follows:
1. a battery;
11. a cap assembly; 111. a cover plate; 1111. a weld; 1112. an explosion-proof valve; 11121. explosion-proof nicking; 1113. a limiting part; 1114. a liquid injection hole; 112. a confluence disc; 113. a terminal; 114. an energy absorbing structure; 1141. a seal ring; 1142. a plastic pad; 11421. a first annular groove; 11422. a second annular groove; 11423. an isolation section;
12. a housing;
13. an electric core; 131. a first pole tab; 132. a second pole tab;
14. a solder part; 15. a bead portion.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting. Wherein the terms "first position" and "second position" are two different positions.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, the embodiment provides a vehicle, which includes a vehicle body and a battery pack, wherein the battery pack is disposed in the vehicle body, and the battery pack provides power to the vehicle body to drive the vehicle body to move. The battery package includes box and battery module, and the battery module sets up in the box, plays the effect fixed and protection to the battery module through the box promptly. Specifically, in order to increase the maximum amount of electricity that can be stored in the entire battery module as much as possible, the battery module includes a plurality of batteries 1, and the plurality of batteries 1 are arranged in a plurality of rows and a plurality of columns. It is understood that the number and the specific arrangement of the batteries 1 can be adjusted according to the actual situation, and the embodiment is not particularly limited.
Referring to fig. 2, fig. 3 and fig. 4, the battery includes a battery cell 13, a casing 12 and a cap assembly 11, the casing 12 is used for accommodating the battery cell 13, the cap assembly 11 is respectively connected with the battery cell 13 and the casing 12, the cap assembly 11 includes a cover plate 111, a junction plate 112 and a terminal 113, the cover plate 111 is disposed at the bottom end of the casing 12 and is connected with a second pole tab 132 of the battery cell 13, the junction plate 112 is attached to the top end of the battery cell 13 to be connected with a first pole tab 131 of the battery cell 13, the terminal 113 is inserted into the top end of the casing 12 and is electrically connected with the junction plate 112, and a gap exists between the top end of the junction plate 112 and the bottom end of the terminal 113. It is understood that, in the present embodiment, the first pole tab 131 is a positive pole tab, and the second pole tab 132 is a negative pole tab.
It can be understood that the cap assembly 11 of the present embodiment avoids friction and collision during assembly and use by providing a gap between the bus bar 112 and the terminal 113, thereby ensuring the working performance and the service life of the battery 1 as much as possible, reducing the number of parts required for the cap assembly 11 as much as possible, saving the manufacturing cost, and reducing the number of mounting and dismounting processes. The cap assembly 11 can avoid friction and collision in the assembling and using processes, ensure the working performance and the service life of the battery 1 as much as possible, reduce the number of parts required by the cap assembly 11 as much as possible, save the manufacturing cost and reduce the assembling and disassembling processes.
In this embodiment, as shown in fig. 4 and 5, the cap assembly 11 further includes an energy absorbing structure 114, the energy absorbing structure 114 is connected to the terminal 113, the housing 12 and the bus bar 112, respectively, and the energy absorbing structure 114 is configured to enable a gap to exist between a top end of the bus bar 112 and a bottom end of the terminal 113. In addition, the energy absorption structure 114 is arranged, so that a certain shock absorption and buffering effect can be achieved among the terminal 113, the shell 12 and the bus bar 112, the shock resistance and impact resistance of the battery 1 are enhanced, and the service life of the whole battery 1 is prolonged.
Specifically, energy absorbing structure 114 includes a sealing ring 1141 and a plastic pad 1142, sealing ring 1141 is located between housing 12 and terminal 113, plastic pad 1142 is located between housing 12 and manifold 112, and sealing ring 1141 penetrates plastic pad 1142. It will be appreciated that the provision of the sealing ring 1141 also enables sealing between the terminal 113 and the housing 12, thereby ensuring the safety of the use of the cap assembly 11. And a gap exists between the top end of the confluence plate 112 and the bottom end of the terminal 113 by the cooperation of the sealing ring 1141 and the plastic pad 1142. For example, the material of the sealing ring 1141 may be rubber resistant to electrolyte or elastic plastic.
In this embodiment, the surface of the plastic pad 1142 is concave-convex to absorb the stress generated by the plastic pad 1142 during swelling, so as to reduce the pressure of the stress on the battery cell 13 and the casing 12, and further absorb the pressure generated by the expansion of the battery cell 13 due to charging.
Specifically, a plurality of first annular grooves 11421 are disposed on the top surface of the plastic pad 1142, and the plurality of first annular grooves 11421 are radially and equidistantly distributed to improve the shock absorption and buffering effect of the whole energy absorbing structure 114. Similarly, a plurality of second annular grooves 11422 are disposed on the bottom surface of the plastic pad 1142, and the plurality of second annular grooves 11422 are radially and equidistantly distributed. It can be understood that the plastic pad 1142 swells in the electrolyte of the battery 1, and the first annular groove 11421 and the second annular groove 11422 can absorb the stress generated by the plastic pad 1142 during swelling, so as to reduce the stress on the battery cell 13 and the case 12, and in addition, when the battery cell 13 expands due to charging, the first annular groove 11421 and the second annular groove 11422 can also absorb the pressure generated by the expansion of the battery cell 13.
Further, the first annular groove 11421 and the second annular groove 11422 are distributed in a staggered manner, so that the surface of the plastic pad 1142 is uneven, and the damping and buffering effect of the whole plastic pad 1142 is further enhanced.
In this embodiment, the edge of plastic pad 1142 extends to form isolation portion 11423 along being close to the dish 112 direction of converging, plastic pad 1142 can cover through isolation portion 11423 and establish on the dish 112 of converging, one side that the dish 112 of converging was kept away from to isolation portion 11423 is laminated with the inner wall of casing 12, the side week wall that will converge the dish 112 through isolation portion 11423 promptly and the inner wall of casing 12 part, thereby avoid converging dish 112 and casing 12 direct contact, improve the compressive property of whole battery 1. Illustratively, the combiner plate 112 is made of aluminum.
As shown in fig. 6 to 12, a welding portion 1111 and an explosion-proof valve 1112 are provided on the cover plate 111, the welding portion 1111 protrudes in a direction close to the battery cell 13 relative to the cover plate 111, and the explosion-proof valve 1112 protrudes in a direction away from the battery cell 13 relative to the cover plate 111, that is, the welding portion 1111 is welded to the second pole tab 132 of the battery cell 13, and the explosion-proof valve 1112 performs an explosion-proof function on the battery cell 13. In addition, since the welding portion 1111 protrudes in a direction approaching the battery cell 13 with respect to the cover plate 111, the explosion-proof valve 1112 protrudes in a direction departing from the battery cell 13 with respect to the cover plate 111, that is, the top surface of the cover plate 111 has a distance h from the bottom surface of the second pole tab 132 1 The bottom surface of the explosion-proof valve 1112 is spaced from the bottom surface of the second pole tab 132 by a distance h 2 Thus, it can know h 2 ＞h 1 Is greater than 0, so can pass through h 1 To absorb the acting force h generated when the cell 13 expands 2 And h 1 The height difference between the two can be used for collecting blasting gas, so that the cover plate 111 and the second pole tab 132 are connected stably, spontaneous combustion and explosion of the battery 1 due to overlarge internal pressure are avoided, and the safety of the battery 1 is improved.
Optionally, the maximum width of the explosion-proof valve 1112 is less than one-half of the radius of the housing 12 to minimize the exhaust space required for the entire battery module.
Further, the explosion-proof valve 1112 is provided with an explosion-proof notch 11121, and the explosion-proof notch 11121 is formed by punching, so that when the internal pressure of the battery 1 is too large, the gas in the housing 12 can be released along the explosion-proof notch 11121, and the damage to the periphery of the battery 1 caused by the gas release is reduced.
Further, a plurality of welding parts 1111 are provided, and the plurality of welding parts 1111 are annularly provided on the cover plate 111 to ensure stability of connection with the second pole tab 132. Exemplarily, the welding portions 1111 are provided in three.
Optionally, the welding portion 1111 is arc-shaped, and a maximum major arc length of the welding portion 1111 is greater than a half of a radius of the battery cell 13, so as to ensure that a contact area between the battery cell 13 and the cover plate 111 is maximized as much as possible, and improve stability of electrical connection between the battery cell 13 and the cover plate 111. Of course, in other embodiments, the welding portion 1111 may have other shapes as long as the welding portion 1111 and the second electrode tab 132 can be stably welded, and the embodiment is not particularly limited.
Optionally, a plurality of explosion-proof valves 1112 are provided, and the plurality of explosion-proof valves 1112 are respectively arranged around the cover plate 111 to improve explosion-proof performance. Illustratively, the explosion-proof valve 1112 is provided in three.
Further, the welding portion 1111 and the explosion-proof valve 1112 are distributed in a staggered manner, so as to ensure the stress balance of the whole cover plate 111, thereby improving the gas circulation inside the housing 12.
In other embodiments, as shown in fig. 10, the cover 111 is further provided with a liquid injection hole 1114 for injecting or exhausting liquid.
Further, the liquid injection hole 1114 coincides with the axis of the battery cell 13, that is, the liquid injection hole 1114 is disposed at the center of the cover plate 111, so as to ensure the stress balance of the whole cover plate 111.
Optionally, the cover plate 111 protrudes from the edge of the liquid injection hole 1114 to a direction close to the battery cell 13 to form a liquid injection boss, so as to further increase the structural strength of the middle part of the cover plate 111.
In this embodiment, as shown in fig. 7 to fig. 9, the outer peripheral edge of the cover plate 111 is further provided with a limiting portion 1113, the limiting portion 1113 protrudes toward the direction close to the electric core 13 relative to the cover plate 111 to surround the second electrode tab 132, i.e., the second electrode tab 132 is positioned by the limiting portion 1113, which not only enhances the strength of the whole cover plate 111, but also facilitates the welding of the subsequent second electrode tab 132 and the welding portion 1111 to be accurate, so as to avoid the stress deviation of the second electrode tab 132 in the welding process from causing the second electrode tab to approach the inner wall of the casing 12, thereby causing poor welding and leading to poor use performance of the electric core 13. In addition, since the limiting portion 1113 can surround the second electrode tab 132, the second electrode tab 132 can be prevented from being damaged when the battery cell 13 is assembled.
Further, the surface of the limiting part 1113 contacting the second pole tab 132 is obliquely arranged, so as to further improve the restraining capability of the second pole tab 132 and avoid the second pole tab 132 from deviating as much as possible.
Considering that after the battery cell 13 is placed in the casing 12 through the opening at the bottom end of the casing 12, it is necessary to cover and fix the cover plate 111 at the opening, that is, the peripheral edge of the cover plate 111 and the bottom end of the casing 12 are welded together by solder, and then the solder part 14 is formed at the joint of the casing 12 and the cover plate 111, so as to realize stable connection of the cover plate 111 and the casing 12.
Of course, as shown in fig. 10 to 12, in other embodiments, a first chamfer may be provided on the housing 12 along the edge of the opening, and a corresponding second chamfer may be provided on the cover plate 111, so that when the cover plate 111 and the housing 12 are welded by welding, a bead 15 can be formed at the joint of the housing 12 and the cover plate 111, which not only facilitates welding and reduces stress concentration, but also further improves the stability of the connection between the cover plate 111 and the housing 12.
In the description herein, references to the description of "some embodiments," "other embodiments," or 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 the invention. In this specification, the schematic representations of the terms used above 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 description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. A cap assembly for a battery comprising a core (13) and a casing (12) for housing the core (13), characterized by comprising:
the current collecting disc (112) is arranged in the shell (12), and the current collecting disc (112) is attached to the top end of the battery cell (13) to be connected with a first pole lug (131) of the battery cell (13);
the cover plate (111), the cover plate (111) set up in the bottom of casing (12) and with second utmost point ear (132) of electricity core (13) are connected, be provided with weld part (1111) and explosion-proof valve (1112) on the cover plate (111), weld part (1111) for cover plate (111) are along being close to the direction protrusion of electricity core (13), explosion-proof valve (1112) for cover plate (111) are along keeping away from the direction protrusion of electricity core (13).
2. The cap assembly according to claim 1, wherein the explosion-proof valve (1112) is provided in plurality, and the plurality of explosion-proof valves (1112) are respectively provided around the cover plate (111).
3. The cap assembly according to claim 2, wherein the welding portion (1111) is provided in plurality, and the welding portion (1111) is provided annularly on the cap plate (111).
4. The cap assembly according to claim 3, characterized in that the welds (1111) and the explosion-proof valves (1112) are staggered.
5. The cap assembly according to any one of claims 1 to 4, characterized in that the weld (1111) is in an arc shape, the maximum major arc length of the weld (1111) being greater than one half of the radius of the cell (13).
6. Cap assembly according to any one of claims 1 to 4, wherein the maximum width of the burst valve (1112) is less than half the radius of the housing (12).
7. A battery, characterized in that it comprises a cell (13), a casing (12) and a cap assembly according to any one of claims 1 to 6, the casing (12) being intended to house the cell (13), the cap assembly being connected to the cell (13) and to the casing (12), respectively.
8. A battery module comprising a plurality of the batteries according to claim 7, wherein the plurality of the batteries are arranged in a plurality of rows and a plurality of columns.
9. A battery pack, comprising a case and the battery module according to claim 8, wherein the battery module is disposed in the case.
10. A vehicle characterized by comprising a vehicle body and the battery pack according to claim 9, the battery pack being provided in the vehicle body.
CN202221650564.6U 2022-06-28 2022-06-28 Cap assembly, battery module, battery pack and vehicle Active CN217788572U (en)

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CN202221650564.6U CN217788572U (en) 2022-06-28 2022-06-28 Cap assembly, battery module, battery pack and vehicle
PCT/CN2022/126164 WO2024000933A1 (en) 2022-06-28 2022-10-19 Cap assembly, battery, battery module, battery pack, and vehicle

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4146665B2 (en) * 2002-04-24 2008-09-10 松下電器産業株式会社 Sealed secondary battery
CN212323103U (en) * 2020-05-26 2021-01-08 大连中比能源科技有限公司 Lithium battery case and lithium battery
CN214625324U (en) * 2021-04-02 2021-11-05 合肥国轩高科动力能源有限公司 Full-tab battery
CN113725532B (en) * 2021-08-25 2023-09-05 远景动力技术(江苏)有限公司 Battery cover plate, battery and battery processing method
CN114142079A (en) * 2021-11-24 2022-03-04 欣旺达电动汽车电池有限公司 Cylindrical battery and manufacturing method thereof
CN115020884A (en) * 2022-06-28 2022-09-06 湖北亿纬动力有限公司 Cap assembly, battery module, battery pack and vehicle
CN217788587U (en) * 2022-06-28 2022-11-11 湖北亿纬动力有限公司 Cap assembly, battery module, battery pack and vehicle

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