CN207719341U - A kind of rectangular lithium ion battery - Google Patents

A kind of rectangular lithium ion battery Download PDF

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Publication number
CN207719341U
CN207719341U CN201721881773.0U CN201721881773U CN207719341U CN 207719341 U CN207719341 U CN 207719341U CN 201721881773 U CN201721881773 U CN 201721881773U CN 207719341 U CN207719341 U CN 207719341U
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CN
China
Prior art keywords
flexible coupling
pole
core
plastic parts
ion battery
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Active
Application number
CN201721881773.0U
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Chinese (zh)
Inventor
孙威
田秀君
戴华斌
张亮
宫颂
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.)
Shenzhen Bak Power Battery Co Ltd
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Dalian CBAK Power Battery Co Ltd
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Priority to CN201721881773.0U priority Critical patent/CN207719341U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The utility model is related to technical field of lithium-ion battery, disclose a kind of rectangular lithium ion battery, including core, cover board, insulating film;The first plastic parts, coping plate, the second plastic parts and the conducting block that cover board includes pole and is socketed in successively on pole are equipped with sealing ring between the first plastic parts and pole;Insulating ceramics is equipped in coping plate, insulation membrane pressure is clipped between the first plastic parts and coping plate;Pole is connected to by being flexible coupling in core, and insulating film is coated on outside core;Pole is equipped with stairstepping pedestal, is flexible coupling and is equipped with through-hole, is flexible coupling and is welded on the consistency of thickness of the thickness and high-order step in stairstepping pedestal that on low level step, are flexible coupling in stairstepping pedestal;Conducting block and pole column riveting.Battery provided by the utility model, reduces cover sheet thickness, improves battery energy density, improves packaging efficiency;When battery core specifications and models are constant, the effective volume of core inside battery core can be increased, increase the energy density of battery.

Description

A kind of rectangular lithium ion battery
Technical field
The utility model is related to technical field of lithium-ion battery, more particularly to a kind of rectangular lithium ion battery.
Background technology
As most ripe lithium ion battery is commercialized currently on the market, the high-energy density that has due to it, high circulation The features such as, it is widely used in automobile power energy supplying system.Especially rectangular lithium ion battery, since the structure of its own is special Point so that its pack mode is simple, efficient, and energy density loss is few after combo, therefore widely used side in automobile power cell Shape lithium ion battery.
The assembling mode of existing rectangular lithium ion battery is:After the core completed with pairing that will be flexible coupling is welded, then with The lamina tecti being completed carries out laser welding, finally bends lug and cladding insulating film, the insulating film coated needs and top Plastic parts in cover board positioned at lower layer carries out hot melt fixation, and such preparation method is primarily present problems with:
1) since the lamina tecti that needs are finished with assembling that is flexible coupling is welded so that pole must be welded on by being flexible coupling On lower surface, so that battery has lost the distance of at least one thickness that is flexible coupling in height space, and occupied space is big, drop The low energy density of battery;
2) since battery has the requirement of cladding insulating film so that the plastic parts in lamina tecti positioned at lower layer must reserve phase Structure is answered to be fixed for being heated with insulating film, wasting manpower and material resources, packaging efficiency is low, is unfavorable for simplifying installation process and simplifies electricity Pool structure.
Utility model content
(1) technical problems to be solved
The purpose of this utility model is to provide a kind of rectangular lithium ion battery, to solve existing rectangular lithium ion battery group The dress problem that efficiency is low, structure is not compact.
(2) technical solution
In order to solve the above-mentioned technical problem, the utility model provides a kind of rectangular lithium ion battery, including core, cover board, Insulating film;The cover board include pole and be socketed in successively on the pole the first plastic parts, coping plate, the second plastic parts and Conducting block is additionally provided with sealing ring between first plastic parts and the pole;It is provided with insulating ceramics in the coping plate, The insulation membrane pressure is clipped between first plastic parts and the coping plate;The pole is connected to the volume by being flexible coupling On core, the insulating film is coated on outside the core;The pole is equipped with stairstepping pedestal, described to be flexible coupling equipped with for institute State the through-hole that pole passes through, it is described be flexible coupling be welded in the stairstepping pedestal on the step surface of low level step, the soft company The consistency of thickness of the thickness connect and high-order step in the stairstepping pedestal;The conducting block and the pole column riveting.
Wherein, described to be flexible coupling including main body and the lug clamping part positioned at the main body both ends that are flexible coupling of being flexible coupling;Institute It states and offers the through-hole in the main body that is flexible coupling, the high-order step of the through-hole and the stairstepping pedestal matches;The pole The lug that ear clamping part is used to be clamped and connected in the core.
Wherein, it is described be flexible coupling welded by ultrasonic bond with the lug, the low level step of the stairstepping pedestal and institute It states to be flexible coupling and be welded by Laser Welding.
Wherein, the stairstepping pedestal is rectangular.
Wherein, the through-hole is rectangular.
Wherein, the bottom surface of first plastic parts is upward forms hollow boss, and confession is opened up in the middle part of the boss The hole that the pole passes through, it is described to be flexible coupling main body and the stairstepping pedestal is embedded in the boss.
(3) advantageous effect
The utility model completes the assembling of cover board, system by using the cover board for splitting structure during prepared by battery core During standby, by among the upper setting that is flexible coupling trepanning will be flexible coupling and be placed among pole and the first plastic parts, reduce soft It is connected to the occupancy to space on cover sheet thickness direction, the thickness of cover board can be effectively reduced, and then improve the energy density of battery; In addition, the assembling of cover board is completed in battery core preparation process, without using pre-assembled cover board so that in assembling process In, insulating film can be made to be directly placed at by way of socket between coping plate and the first plastic parts, be secured in a press, avoided Heat-welding process in the prior art, simplifies assembling process, uses manpower and material resources sparingly, and packaging efficiency is improved, additionally due to not needing First plastic parts is reserved structure and is heated, and the structure of the first plastic parts is simplified, and reduces the height of the first plastic parts, further Reduce battery core in the height direction can increase inside battery core the occupancy in space under the premise of battery core specifications and models are constant The effective volume of core, and then increase the energy density of battery.
Description of the drawings
Fig. 1 is the side view of the exploded perspective view of lithium ion battery in the utility model embodiment;
Fig. 2 is the isometric side view of Fig. 1;
Fig. 3 is the structural schematic diagram of pole in the utility model embodiment;
Fig. 4 is the structural side view being flexible coupling in the utility model embodiment;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the position view of ultrasonic bond and Laser Welding in the utility model embodiment;
Fig. 7 is the structure sectional view before battery cover board riveting in the utility model embodiment;
Fig. 8 is the structure sectional view after battery cover board riveting in the utility model embodiment;
Fig. 9 is that manufactured rectangular lithium ion battery enters the schematic diagram before shell in the utility model embodiment;
In figure, 1- conducting blocks;The second plastic parts of 2-;3- insulating ceramicses;4- coping plates;5- insulating films;The first plastic parts of 6-; 7- core;8- sealing rings;9- poles;91- high position steps;911, the step surface of high-order step;92, low level step;921, low level The step surface of step;10- is flexible coupling;101- ultrasound welding zones;102- laser welding zones;103- is flexible coupling main body;1031, through-hole; 104, lug clamping part;11, lug.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Example is not intended to limit the scope of the present invention for illustrating the utility model.
In the description of the present invention, it should be noted that unless otherwise indicated, the meaning of " plurality " is two or two More than a;The instructions such as term "upper", "lower", "left", "right", "inner", "outside", " front end ", " rear end ", " head ", " tail portion " Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification Description, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and behaviour Make, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for describing Purpose is not understood to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection;It can be mechanical connection, can also be electrical connection;It can be directly connected, it can also be indirectly connected through an intermediary. For the ordinary skill in the art, visual concrete condition understands that above-mentioned term in the present invention specific contains Justice.
Fig. 1 is the side view of the exploded perspective view of lithium ion battery in the utility model embodiment;Fig. 2 is the isometric of Fig. 1 Side view;Fig. 3 is the structural schematic diagram of pole in the utility model embodiment;Fig. 4 is to be flexible coupling in the utility model embodiment Structural side view;Fig. 5 is the vertical view of Fig. 4;Fig. 6 is that the position of ultrasonic bond and Laser Welding is illustrated in the utility model embodiment Figure;Fig. 7 is the structure sectional view before battery cover board riveting in the utility model embodiment;Fig. 8 is in the utility model embodiment Structure sectional view after battery cover board riveting;Before Fig. 9 enters shell for manufactured rectangular lithium ion battery in the utility model embodiment Schematic diagram.
As shown in Fig. 1-Fig. 9, the utility model embodiment provide rectangular lithium ion battery, including core 7, cover board, Insulating film 5.In the utility model embodiment, battery cover board is preceding without assembling in battery preparation, complete in battery core preparation process At its assembling.The first plastic parts 6, coping plate 4,2 and of the second plastic parts that cover board includes pole 9 and is socketed in successively on pole 9 Conducting block 1 is additionally provided with sealing ring 8 between first plastic parts 6 and pole 9.Insulating ceramics 3, insulating film are provided in coping plate 4 5 pressures are clipped between the first plastic parts 6 and coping plate 4.The placement order of insulating film 5 and position are as described above.Pole 9 passes through soft company It connects 10 to be connected in core 7, insulating film 5 is coated on outside above-mentioned core 7.Pole 9 is equipped with stairstepping pedestal, is flexible coupling on 10 and sets There is the through-hole 1031 passed through for pole 9, being flexible coupling 10 is welded on the step surface 921 of low level step in stairstepping pedestal, soft company Connect the consistency of thickness of 10 thickness and high-order step 91 in stairstepping pedestal;Conducting block 1 is riveted with pole 9.
Preferably, be flexible coupling 10 includes being flexible coupling main body 103 and the lug clamping part positioned at 103 both ends of main body that are flexible coupling 104.Through-hole 1031 is offered in the main body that is flexible coupling 103, through-hole 1031 and the high-order step 91 of stairstepping pedestal match.Lug Clamping part 104 can be inserted in for the lug 11 in core 7 that is clamped and connected, lug 11 in lug clamping part 104.
Preferably, the bottom surface of the first plastic parts 6 is upward forms hollow boss, is opened up for pole 9 in the middle part of boss The hole passed through, the main body that is flexible coupling 103 and stairstepping pedestal are embedded in boss, and the lower section of boss is for the accommodating main body that is flexible coupling 103 and stairstepping pedestal.It is preferred that be flexible coupling 10 thickness and high-order step 91 consistency of thickness, designing in this way can be in the thickness of cover board Degree direction on save one be flexible coupling 10 height, keep battery structure more compact, promote the energy density of battery.
Preferably, be flexible coupling and 10 welded by ultrasonic bond with lug 11, the low level step 92 of stairstepping pedestal be flexible coupling 10 are welded by Laser Welding, and the position of ultrasonic welding zone 101 and laser welding zone 102 is as shown in Figure 6.
Wherein, stairstepping pedestal is rectangular, and through-hole is rectangular.
Specific assembling process is as follows:
S1, will be flexible coupling and the tab welding in the core matched.
As shown in Figures 1 and 2, it is connected with lug 11 in core 7.As shown in Figures 4 and 5, it is flexible coupling 10 including soft Connect main body 103 and the lug clamping part 104 positioned at 103 both ends of main body that are flexible coupling.The main body that is flexible coupling 103 is sheet, and centre is opened Peripheral shape equipped with square through hole 1031, the through-hole 1031 and the high-order step 91 of stairstepping pedestal on pole 9 matches.Pole The lug 11 in core 7 can be clamped in ear clamping part 104.
Wherein, welding process is as follows:
S11, the lug being connected in core is inserted into lug clamping part.
S12, by ultrasonic bond by tab welding on lug clamping part.As shown in Figure 2, there are the two pieces of core 7 in left and right, often Lug 11 is both provided on block, the lug clamping part 104 of 10 one end that are flexible coupling is welded with the lug 11 of one of core 7, soft It connects the lug clamping parts 104 of 10 other ends and the lug 11 of another piece of core 7 welds, that is, being flexible coupling 10 is welded on two pieces of core Between 7, the position of ultrasonic welding zone 101 is as shown in Figure 6.
S2, will be flexible coupling is sleeved on pole, and will be flexible coupling on the step surface for the low level step for being welded on pole.
Wherein, pole includes stairstepping pedestal, and stairstepping pedestal includes low level step and high-order step.
It is specific this, the through-hole 1031 being arranged in the main body that is flexible coupling 103 can be socketed on pole 9, with reference to Fig. 4 and Fig. 5.Such as figure Shown in 3, one end of pole 9 is equipped with stairstepping pedestal, and stairstepping pedestal includes high-order step 91 and low level step 92.Such as Fig. 5 Shown in, 103 middle part of the main body that is flexible coupling opens up through-hole 1031, the peripheral shape one of the shape of the through-hole 1031 and high-order step 91 It causes.When assembling, being flexible coupling for lug 11 will be welded with and be sleeved on from top to bottom on pole 9, until the lower surface for the main body 103 that is flexible coupling It is contacted with the upper surface of low level step 92, through-hole 1031 matches with high-order step 91.After set connects, will be flexible coupling 10 is welded on On the step surface 921 of low level step, the fixation of the two is realized, it is preferred to use in Laser Welding, the position of laser welding zone 102 such as Fig. 6 It is shown.
S3, sealing ring is sleeved on pole, the first plastic parts is socketed on sealing ring.
As shown in Fig. 7 or Fig. 8, sealing ring 8 is stairstepping sleeve-shaped, is set on pole 9 from the top down of pole 9, The baseplane of sealing ring 8 is contacted with the step surface 911 of the high-order step of pole 9.After packaging sealing ring 8, it is arranged the first plastic parts 6.The bottom surface of first plastic parts 6 is upward to form hollow boss, opens up the hole passed through for pole 9 in the middle part of boss, the hole Internal diameter match with 8 maximum outer diameter of sealing ring or the internal diameter in the hole be more than 8 maximum outer diameter of sealing ring.Under boss Side is hollow structure, and for accommodating be flexible coupling main body 103 and stairstepping pedestal, the main body that is flexible coupling 103 and stairstepping pedestal are embedded In boss, as shown in Figure 7.
S4, insulating film 5, coping plate 4, insulating ceramics 3,2 and of the second plastic parts are installed around pole 9 successively from top to bottom Conducting block 1;Wherein, insulating film 5 is clamped between the first plastic parts 6 and coping plate 4.
Specifically, the hole passed through for the first plastic parts 6 is opened up on insulating film 5, as shown in Figure 2, when assembling, insulating film 5 On hole be just sleeved on the periphery of 6 boss of the first plastic parts, while coping plate 4 is also equipped with convex similar in the first plastic parts 6 Platform so that insulating film 5 can be entirely pressed between the first plastic parts 6 and coping plate 4, realized the fixation of insulating film 5, be not required to It wants additional connection type to be fixed with the first plastic parts 6, eliminates heat-welding process in the prior art, simplify the first modeling The structure of glue part 6 reduces the height of the first plastic parts 6, saves built-up time, and keeps core strueture compacter.
S5, pole and conducting block are riveted, completes last sealing.Before riveting, need to compress each parts, to reach To better fastening and sealing effect, battery leakage is prevented, ensures battery powered stability.
S6, bending lug, core is wrapped in insulating film.When initial, for soldering polar ear 11 and pole 9, two pieces of volumes Core 7 is separated, and after the completion of welding and riveting, bending lug 11 makes two pieces of core 7 be aligned, by fixed insulation at the top of cover board Film 5 is folded and is wrapped up downwards, and 7 entirety of core is wrapped in insulating film 5, completes preliminary assembling, and subsequent handling can be according to existing There is ripe assembling mode to carry out, such as the battery core after preliminary assembling is placed in aluminum hull.State after the tentatively package of core 7 As shown in Figure 9.
Preferably, be flexible coupling the consistency of thickness of high-order step 91 in 10 thickness and stairstepping pedestal, so that assembling Being flexible coupling afterwards 10 is placed exactly between 9 pedestal of pole and the first plastic parts 6, is eliminated and is flexible coupling 10 on cover sheet thickness direction To the occupancy of shell space, keep battery structure more compact, improves the integral energy density of core 7.
The utility model completes the assembling of cover board, system by using the cover board for splitting structure during prepared by battery core During standby, by among the upper setting that is flexible coupling trepanning will be flexible coupling and be placed among pole and the first plastic parts, reduce soft It is connected to the occupancy to space on cover sheet thickness direction, the thickness of cover board can be effectively reduced, and then improve the energy density of battery; In addition, the assembling of cover board is completed in battery core preparation process, without using pre-assembled cover board so that in assembling process In, insulating film can be made to be directly placed at by way of socket between coping plate and the first plastic parts, be secured in a press, avoided Heat-welding process in the prior art, simplifies assembling process, uses manpower and material resources sparingly, and packaging efficiency is improved, additionally due to not needing First plastic parts is reserved structure and is heated, and the structure of the first plastic parts is simplified, and reduces the height of the first plastic parts, further Reduce battery core in the height direction can increase inside battery core the occupancy in space under the premise of battery core specifications and models are constant The effective volume of core, and then increase the energy density of battery.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection domain within.

Claims (6)

1. a kind of rectangular lithium ion battery, which is characterized in that including core, cover board, insulating film;The cover board include pole and according to Secondary the first plastic parts being socketed on the pole, coping plate, the second plastic parts and conducting block, first plastic parts with it is described Sealing ring is additionally provided between pole;Insulating ceramics is provided in the coping plate, the insulation membrane pressure is clipped in first modeling Between glue part and the coping plate;The pole is connected to by being flexible coupling in the core, and the insulating film is coated on described Outside core;The pole is equipped with stairstepping pedestal, described to be flexible coupling equipped with the through-hole passed through for the pole, the soft company It connects and is welded in the stairstepping pedestal on the step surface of low level step, in the thickness being flexible coupling and the stairstepping pedestal The consistency of thickness of high-order step;The conducting block and the pole column riveting.
2. rectangular lithium ion battery as described in claim 1, which is characterized in that described to be flexible coupling including main body and the position of being flexible coupling Lug clamping part in the main body both ends that are flexible coupling;The through-hole, the through-hole and institute are offered in the main body that is flexible coupling The high-order step for stating stairstepping pedestal matches;The lug that the lug clamping part is used to be clamped and connected in the core.
3. rectangular lithium ion battery as claimed in claim 2, which is characterized in that it is described be flexible coupling pass through ultrasound with the lug Weldering welding, the low level step of the stairstepping pedestal with it is described be flexible coupling welded by Laser Welding.
4. rectangular lithium ion battery as claimed in claim 2, which is characterized in that the stairstepping pedestal is rectangular.
5. rectangular lithium ion battery as claimed in claim 4, which is characterized in that the through-hole is rectangular.
6. rectangular lithium ion battery as described in claim 1, which is characterized in that the bottom surface of first plastic parts is upward Hollow boss is formed, the hole passed through for the pole, be flexible coupling main body and the ladder are opened up in the middle part of the boss Shape pedestal is embedded in the boss.
CN201721881773.0U 2017-12-28 2017-12-28 A kind of rectangular lithium ion battery Active CN207719341U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108963177A (en) * 2018-09-13 2018-12-07 中兴高能技术有限责任公司 A kind of lithium battery electric core and lithium battery electric core packet insulate film method
CN109037508A (en) * 2018-08-23 2018-12-18 常州微宙电子科技有限公司 A kind of electric lids of high-energy density lithium battery
CN109686876A (en) * 2019-01-12 2019-04-26 欣旺达电动汽车电池有限公司 Power battery top cover
CN110323367A (en) * 2019-07-04 2019-10-11 湖北金泉新材料有限责任公司 Top cover, the assembly method of top cover and battery
CN110767848A (en) * 2019-11-21 2020-02-07 四川新敏雅电池科技有限公司 Battery cover plate assembly and battery cell
CN114421064A (en) * 2021-12-31 2022-04-29 天津市捷威动力工业有限公司 Battery and battery assembling method
WO2022227376A1 (en) * 2021-04-29 2022-11-03 深圳市科达利实业股份有限公司 Rivet-type battery cover

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109037508A (en) * 2018-08-23 2018-12-18 常州微宙电子科技有限公司 A kind of electric lids of high-energy density lithium battery
CN108963177A (en) * 2018-09-13 2018-12-07 中兴高能技术有限责任公司 A kind of lithium battery electric core and lithium battery electric core packet insulate film method
CN109686876A (en) * 2019-01-12 2019-04-26 欣旺达电动汽车电池有限公司 Power battery top cover
CN110323367A (en) * 2019-07-04 2019-10-11 湖北金泉新材料有限责任公司 Top cover, the assembly method of top cover and battery
CN110767848A (en) * 2019-11-21 2020-02-07 四川新敏雅电池科技有限公司 Battery cover plate assembly and battery cell
WO2022227376A1 (en) * 2021-04-29 2022-11-03 深圳市科达利实业股份有限公司 Rivet-type battery cover
GB2610729A (en) * 2021-04-29 2023-03-15 Shenzhen Kedali Ind Co Ltd Rivet-type battery cover
CN114421064A (en) * 2021-12-31 2022-04-29 天津市捷威动力工业有限公司 Battery and battery assembling method

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