CN208622794U - Secondary cell and its cap assembly - Google Patents
Secondary cell and its cap assembly Download PDFInfo
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- CN208622794U CN208622794U CN201821232531.3U CN201821232531U CN208622794U CN 208622794 U CN208622794 U CN 208622794U CN 201821232531 U CN201821232531 U CN 201821232531U CN 208622794 U CN208622794 U CN 208622794U
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- lamina tecti
- separator
- cap assembly
- main part
- electrode terminal
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- 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
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Abstract
The utility model provides a kind of secondary cell and its cap assembly.Cap assembly includes lamina tecti, first electrode terminal, fixing piece and the first separator.Lamina tecti has first through hole.First electrode terminal includes main part, and main part covers first through hole, and main part, the first separator and fixing piece are all set in the inside of lamina tecti.Main part is fixed between lamina tecti and the first separator by the first separator at least partially around main part；Fixing piece includes interconnecting piece and the protrusion that is connected with interconnecting piece, and interconnecting piece is fixed with lamina tecti, and protrusion is fixed with the first separator；First electrode terminal is separated from each other by the first separator with fixing piece.Secondary cell includes electrode assembly, shell and the cap assembly.Shell has opening, and electrode assembly is contained in shell and is electrically connected to first electrode terminal；Lamina tecti is fixed on shell and covers the opening of shell, and fixing piece is located at the side of the close electrode assembly of lamina tecti.
Description
Technical field
The utility model relates to field of batteries more particularly to a kind of secondary cells and its cap assembly.
Background technique
Secondary cell generally includes electrode assembly, accommodates the shell of electrode assembly and is fixed on the cap assembly of shell,
The lamina tecti of cap assembly is by housing seal.Cap assembly further includes the electrode terminal and separator for being set to lamina tecti, electrode
Terminal needs to be electrically connected across lamina tecti and with electrode assembly, to realize the charge and discharge of electrode assembly, separator will be for that will push up
Cover board and electrode terminal separate.In the prior art, fixing piece usually is set in the outside of lamina tecti, electrode terminal is fixed
To lamina tecti, still, in order to connect with fixing piece, electrode terminal, which is projected into the part on the upside of lamina tecti, needs biggish height
Degree, will increase the whole height of secondary cell in this way, reduces the volume energy density of secondary cell；Meanwhile in order to avoid electrode
Terminal is connected via fixing piece with lamina tecti, and separator also needs fixing piece and lamina tecti is apart from top to bottom, further increases two
The whole height of primary cell.
Utility model content
In view of the problems in the background art, the purpose of this utility model is to provide a kind of secondary cell and its top covers
Component can reduce the whole height of secondary cell, improve energy density.
To achieve the goals above, the utility model provides a kind of secondary cell and its cap assembly.
Cap assembly includes lamina tecti, first electrode terminal, fixing piece and the first separator.Lamina tecti has first to lead to
Hole.First electrode terminal includes main part, and main part covers first through hole, and main part, the first separator and fixing piece are all provided with
It is placed in the inside of lamina tecti.Main part is fixed on lamina tecti and first at least partially around main part by the first separator
Between separator；Fixing piece includes interconnecting piece and the protrusion that is connected with interconnecting piece, and interconnecting piece is fixed with lamina tecti, protrusion and first
Separator is fixed；First electrode terminal is separated from each other by the first separator with fixing piece.
Interconnecting piece is annular in shape；Protrusion includes the transition region of tubular, and transition region is connected to interconnecting piece and curved relative to interconnecting piece
Folding, transition region are prominent towards the direction far from lamina tecti.The transition region of tubular surrounds cavity, and main part is contained in cavity.Transition
Area offers the second through-hole, and the first separator is filled into the second through-hole.
Protrusion further includes Support, and Support is connected to one end of the separate lamina tecti of transition region, and Support relative to
Transition region bending, Support extend towards the direction away from interconnecting piece.Preferably, Support is annular in shape；Along the vertical direction, Support
Projection and first electrode terminal projection it is least partially overlapped.
Lamina tecti is equipped with groove in the side close to fixing piece；Interconnecting piece is at least partially housed in groove, and interconnecting piece welds
It is connected to lamina tecti.
Cap assembly further includes sealing element, is held between main part and lamina tecti.
First electrode terminal further includes the first extension, and the first extension is connected with main part and protrudes into first through hole；Top
Cap assemblies further include the second separator, and the second separator is fixed on the first extension and separates the first extension and lamina tecti.
Secondary cell includes electrode assembly, shell and the cap assembly.Shell has opening, electrode assembly receiving
In in shell and being electrically connected to first electrode terminal；Lamina tecti is fixed on shell and covers the opening of shell, and fixing piece is located at
The side of the close electrode assembly of lamina tecti.
The beneficial effects of the utility model are as follows: in the secondary cell course of work, in order to avoid electrode assembly is because of vibration
Or expand and contacted with lamina tecti, there are certain spaces between electrode assembly and lamina tecti；The application is directly by the first isolation
The inside of lamina tecti is arranged in part and fixing piece, makes full use of the space, and fixing piece is avoided to increase the whole high of secondary cell
Degree, improves the volume energy density of secondary cell.In addition, fixing piece and first electrode terminal are separated from each other, so fixing piece
Interconnecting piece can be directly fixed on lamina tecti, it is not necessary that insulating element is arranged between interconnecting piece and lamina tecti, thus reduce first every
Off member and fixing piece the space occupied.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the secondary cell of the utility model.
Fig. 2 is the cross-sectional view of the secondary cell of Fig. 1.
Fig. 3 is the enlarged drawing of Fig. 2 dotted box portion.
Fig. 4 is the schematic diagram of lamina tecti in Fig. 3.
Fig. 5 is the exploded view of the cap assembly of the secondary cell of Fig. 1.
Fig. 6 is the schematic diagram of first electrode terminal, fixing piece and separator in Fig. 5.
Fig. 7 to Figure 10 is the schematic diagram of the different embodiments of the cap assembly of the utility model.
Wherein, the reference numerals are as follows:
1 cap assembly, 14 first separator
11 lamina tecti, 15 sealing element
111 groove, 16 second separator
12 first electrode terminals 17 insulation frame
121 main part, 18 second electrode terminal
1211 first end daughter board, 2 electrode assembly
1212 second end daughter board, 3 shell
122 first extension, 4 switching piece
123 second extension H1 first through hole
13 the second through-holes of fixing piece H2
131 interconnecting piece H3 third through-holes
132 protrusion H4 fourth holes
1321 transition region R cavitys
1322 Support
Specific embodiment
Referring to Figures 1 and 2, in the first embodiment, secondary cell includes cap assembly 1, electrode assembly 2 and shell 3.
Shell 3 can have hexahedral shape or other shapes.Accommodating chamber is formed inside shell 3, with 2 He of accommodate electrod component
Electrolyte.Shell 3 forms opening at one end, and electrode assembly 2 can be placed into the accommodating chamber of shell 3 via described be open.Shell 3
It can be made, can also be made of insulating materials such as plastic cement of the material of the conductive metals such as aluminum or aluminum alloy.
Cap assembly 1 includes lamina tecti 11 and the first electrode terminal 12 and second electrode terminal that are set to lamina tecti 11
18, lamina tecti 11 is fixed on shell 3 and covers the opening of shell 3, and electrode assembly 2 is enclosed in shell 3.
Electrode assembly 2 includes positive plate, negative electrode tab and diaphragm, and diaphragm is set between positive plate and negative electrode tab.Positive plate,
Diaphragm and negative electrode tab can be stacked sequentially and be wound as jelly web-like.
Positive plate includes plus plate current-collecting body (such as aluminium foil) and the positive electrode active materials coated on plus plate current-collecting body surface
(such as cobalt acid lithium), negative electrode tab include negative current collector (such as copper foil) and the negative electrode active coated on negative current collector surface
Material (such as silicon).The edge of plus plate current-collecting body can have the blank area not covered by positive electrode active materials, plus plate current-collecting body
Blank area can be connected to first electrode terminal 12 via a switching piece 4.The edge of negative current collector, which can have, not to be born
The blank area of pole active material covering, the blank area of negative current collector can be connected to second electrode end via another switching piece 4
Son 18.
Referring to Fig. 3, cap assembly 1 further includes fixing piece 13 and the first separator 14.Lamina tecti 11 has first through hole H1,
First electrode terminal 12 includes main part 121, and main part 121 covers first through hole H1.Main part 121, the first separator 14 with
And fixing piece 13 is all set in the inside of lamina tecti 11, that is, lamina tecti 11 close electrode assembly 2 side.
Fixing piece 13 includes interconnecting piece 131 and the protrusion 132 being connected with interconnecting piece 131, interconnecting piece 131 and lamina tecti 11
Fixed, protrusion 132 and the first separator 14 are fixed.For example, the first separator 14 is usually plastic cement, and pass through injection molding and protrusion
132 are linked together.
Main part 121 is fixed on lamina tecti 11 and first at least partially around main part 121 by the first separator 14
Between separator 14.Specifically, the first separator 14 can surround the outer rim of main part 121, while a part extends to main part
The side of 121 separate lamina tecti 11, thus supportive body portion 121.Wherein, first electrode terminal 12 passes through the first separator 14
It is separated from each other with fixing piece 13.
In the secondary cell course of work, in order to avoid electrode assembly 2 is contacted because vibrating or expand with lamina tecti 11,
There are certain spaces between electrode assembly 2 and lamina tecti 11；Directly the first separator 14 and fixing piece 13 are arranged by the application
In the inside of lamina tecti 11, the space is made full use of, fixing piece 13 is avoided to increase the whole height of secondary cell, is improved secondary
The volume energy density of battery.
In addition, fixing piece 13 and first electrode terminal 12 are separated from each other, so the interconnecting piece 131 of fixing piece 13 can directly be consolidated
Due to lamina tecti 11, it is not necessary that insulating element is arranged between interconnecting piece 131 and lamina tecti 11, to reduce 14 He of the first separator
13 the space occupied of fixing piece.
First electrode terminal 12 further includes the first extension 122, and the first extension 122 is connected and protrudes into main part 121
First through hole H1；Cap assembly 1 further includes the second separator 16, and the second separator 16 is fixed on the first extension 122 and by
One extension 122 and lamina tecti 11 separate.Second separator 16 can be linked together by being molded with the first extension 122.First
Extension 122 can be projected into the top of lamina tecti 11, and in order to connect with busbar, (busbar is for connecting multiple secondary electricity
Pond, to form battery modules)；And since first electrode terminal 12 has passed through fixing piece 13 and the first separator 14 fixed to top
Cover board 11, the first extension 122 with other fixing components without being connected, so compared with prior art, protruding lamina tecti 11
Height can accordingly reduce, to improve the energy density of secondary cell.
First electrode terminal 12 further includes the second extension 123, and the second extension 123 is connected and is located at main part 121
Side of the main part 121 far from lamina tecti 11；First separator 14 can be equipped with fourth hole H4, and the second extension 123 passes through the
Four through-hole H4 are simultaneously connected to switching piece 4.
Cap assembly 1 further includes sealing element 15, is held between main part 121 and lamina tecti 11.Main part 121 compresses close
Sealing 15, thus from inner seal first through hole H1.Sealing element 15 can be sheathed on the first extension 122.
Referring to figure 5 and figure 6, interconnecting piece 131 is annular in shape.Cricoid interconnecting piece 131 can increase fixing piece 13 and lamina tecti 11
Between connection area, improve connective stability.Protrusion 132 includes the transition region 1321 of tubular, and transition region 1321 is connected to
It socket part 131 and is bent relative to interconnecting piece 131, transition region 1321 is prominent towards the direction far from lamina tecti 11.Main part 121 compresses
When sealing element 15, sealing element 15 applies reversed elastic force to main part 121 and the first separator 14, and the rigidity of the first separator 14
It is poor, if cannot effectively support, it is easy to deform under the action of the elastic force；If 14 only a part of the first separator
It is connected with protrusion 132, then the part of the first separator 14 not being connected with protrusion 132 is unable to get direct support, so
It is easy to deform under the action of the elastic force, leads to 15 unbalance stress of sealing element, influence sealing performance.And in this application, it dashes forward
Portion 132 is tubular, and the first separator 14 can be equably supported from surrounding, and the first separator 14 is avoided to deform locally,
Guarantee leakproofness.
The transition region 1321 of tubular surrounds cavity R, and main part 121 is contained in cavity R.121 based on cavity R,
One separator 14 and sealing element 15 provide space.
Transition region 1321 offers the second through-hole H2, and the first separator 14 is filled into the second through-hole H2, can mention in this way
The bonding strength of high first separator 14 and transition region 1321, avoids the first separator 14 from separating with transition region 1321.
Protrusion 132 further includes Support 1322, and Support 1322 is connected to the one of the separate lamina tecti 11 of transition region 1321
End, and Support 1322 is bent relative to transition region 1321, Support 1322 extends towards the direction away from interconnecting piece 131.It is preferred that
Ground, Support 1322 is annular in shape and forms third through-hole H3；(the i.e. side of the direction of lamina tecti 11 electrode assembly 2 along the vertical direction
To), the projection of Support 1322 and the projection of first electrode terminal 12 are least partially overlapped.
Support 1322 can be the ring plate perpendicular to up and down direction, directly to the first separator 14 and main part 121
Upward support force is provided, so that main part 121 is pressed on lamina tecti 11.If the projection of Support 1322 is not with first
The projection of electrode terminal 12 is overlapped, and main part 121 is only supported by the first separator 14, then when the first 14 aging of separator,
First separator 14 is easily deformed from the part of downside supportive body portion 121, and main part 121 is caused to loosen.And in this application,
Since the projection of Support 1322 and the projection of first electrode terminal 12 are least partially overlapped, so even if the first separator 14 is old
Change, Support 1322 also can support the first separator 14 and main part 121 from downside, avoid the first separator 14 from deforming, prevent
Main part 121 loosens.
Fixing piece 13 can be made up of stamped sheet metal.
Referring to Fig. 4, lamina tecti 11 is equipped with groove 111 in the side close to fixing piece 13；Interconnecting piece 131 is at least partly received
It is dissolved in groove 111, and interconnecting piece 131 is welded in lamina tecti 11.The outer rim of interconnecting piece 131 is contacted with the peripheral wall of groove 111, along
The boundary of contact carries out butt welding；It is welded relative to traditional laser penetration, butt welding can be effectively reduced in welding process and be sent out
Heat avoids the first separator of high temperature 14.By opening up groove 111,13 the space occupied of fixing piece can be reduced.
Referring to Fig. 3, switching piece 4 is located at the downside of first electrode terminal 12 and protrusion 132, if the close of protrusion 132 turns
The side of contact pin 4 is exposed, then switching piece 4 is easy to contact with protrusion 132, and then leads to short circuit, therefore, referring to Fig. 5 and figure
6, the first separator 14 preferably completely coats protrusion 132, so that switching piece 4 and protrusion 132 be separated.
Referring to Fig. 2, cap assembly 1 further includes insulation frame 17, is fixed on the inner surface of lamina tecti 11, and by electrode assembly 2
It is separated with lamina tecti 11.Insulation frame 17 reserves certain space between lamina tecti 11 and electrode assembly 2, and the first separator 14
It is located in the space with fixing piece 13.
Referring to Fig. 7, second embodiment and the first embodiment of the application is substantially the same, and difference is, second embodiment
The second extension 123 of first electrode terminal 12 can save.At this point, can stamp out convex closure on switching piece 4, convex closure is protruded into
Fourth hole H4 is simultaneously welded in main part 121.
Referring to Fig. 8,3rd embodiment and the second embodiment of the application is substantially the same, and difference is, 3rd embodiment
First electrode terminal 12 further save the first extension 122,12 the space occupied of first electrode terminal can be reduced in this way.
When multiple secondary cells need to connect by busbar, protrusion can be set on busbar, and protrusion insertion first through hole H1 is simultaneously
It is welded in body part 121, so that multiple secondary cells be connected together.
Referring to Fig. 9, fourth embodiment and the first embodiment of the application is substantially the same, and difference is, the first separator
14 only coat a part of protrusion 132, can save material in this way.
Referring to Fig.1 0, the 5th embodiment of the application is substantially the same with first embodiment, and difference is, main part 121
Including first end daughter board 1211 and second end daughter board 1212, first end daughter board 1211 and second end daughter board 1212 it is stacked on top of one another and even
It is integrated, and the material of first end daughter board 1211 and the material of second end daughter board 1212 are different metals.First end daughter board
1211 are integrated component and made of aluminum with the first extension 122, and second end daughter board 1212 and the second extension 123 are integrated structure
It part and is made of copper, that is to say, that first electrode terminal 12 is copper-aluminum composite board.
First electrode terminal 12 is electrically coupleable to the negative electrode tab of electrode assembly 2.Specifically, the negative current collector of negative electrode tab is logical
It is often copper foil, since different types of metal is difficult to weld, so the material of switching piece 4 is copper；And due to busbar usually by
Aluminium is made, so first electrode terminal 12 is preferably copper for the ease of welding first electrode terminal 12, busbar and switching piece 4
Aluminum composite plate.Since the joint face of first end daughter board 1211 and second end daughter board 1212 is weak area, if second end
Daughter board 1212 for a long time by downward tensile stress (for example, electrode assembly 2 via switching piece 4 to second end daughter board 1212 apply to
Under power), then first end daughter board 1211 and second end daughter board 1212 may crack at joint face；And the application
Fixing piece 13 and the first separator 14 are to support second end daughter board 1212 from downside, to reduce first end daughter board 1211 and second
Power between terminal board 1212 prevents first end daughter board 1211 and second end daughter board 1212 from separating.
Claims (10)
1. a kind of cap assembly of secondary cell (1), including lamina tecti (11), first electrode terminal (12), fixing piece (13) and
First separator (14)；
Lamina tecti (11) has first through hole (H1)；
It is characterized in that,
First electrode terminal (12) includes main part (121), and main part (121) covers first through hole (H1), main part (121),
First separator (14) and fixing piece (13) are all set in the inside of lamina tecti (11)；
First separator (14) at least partially around main part (121), by main part (121) be fixed on lamina tecti (11) and
Between first separator (14)；
Fixing piece (13) includes interconnecting piece (131) and the protrusion (132) being connected with interconnecting piece (131), interconnecting piece (131) and top cover
Plate (11) is fixed, and protrusion (132) and the first separator (14) are fixed；
First electrode terminal (12) is separated from each other by the first separator (14) with fixing piece (13).
2. cap assembly (1) according to claim 1, which is characterized in that
Interconnecting piece (131) is annular in shape；
Protrusion (132) includes the transition region (1321) of tubular, and transition region (1321) is connected to interconnecting piece (131) and relative to connection
Portion (131) bending, transition region (1321) are prominent towards the direction far from lamina tecti (11).
3. cap assembly (1) according to claim 2, which is characterized in that the transition region (1321) of tubular surrounds cavity
(R), main part (121) is contained in cavity (R).
4. cap assembly (1) according to claim 2, which is characterized in that transition region (1321) offers the second through-hole
(H2), the first separator (14) is filled into the second through-hole (H2).
5. the cap assembly (1) according to any one of claim 2-4, which is characterized in that protrusion (132) further includes support
Area (1322), Support (1322) are connected to one end of the separate lamina tecti (11) of transition region (1321), and Support (1322)
It is bent relative to transition region (1321), Support (1322) extend towards the direction away from interconnecting piece (131).
6. cap assembly (1) according to claim 5, which is characterized in that Support (1322) are annular in shape；Vertically side
To the projection of Support (1322) and the projection of first electrode terminal (12) are least partially overlapped.
7. cap assembly described in any one of -4 (1) according to claim 1, which is characterized in that
Lamina tecti (11) is equipped with groove (111) in the side close to fixing piece (13)；
Interconnecting piece (131) is at least partially housed in groove (111), and interconnecting piece (131) is welded in lamina tecti (11).
8. cap assembly described in any one of -4 (1) according to claim 1, which is characterized in that cap assembly (1) further includes close
Sealing (15) is held between main part (121) and lamina tecti (11).
9. cap assembly described in any one of -4 (1) according to claim 1, which is characterized in that
First electrode terminal (12) further includes the first extension (122), the first extension (122) be connected with main part (121) and
Protrude into first through hole (H1)；
Cap assembly (1) further includes the second separator (16), and the second separator (16) is fixed on the first extension (122) and by
One extension (122) and lamina tecti (11) separate.
10. a kind of secondary cell, which is characterized in that including any one of electrode assembly (2), shell (3) and claim 1-9
The cap assembly (1)；
Shell (3) has opening, and electrode assembly (2) is contained in shell (3) and is electrically connected to first electrode terminal (12)；
Lamina tecti (11) is fixed on shell (3) and covers the opening of shell (3), and fixing piece (13) is located at leaning on for lamina tecti (11)
The side of nearly electrode assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821232531.3U CN208622794U (en) | 2018-08-01 | 2018-08-01 | Secondary cell and its cap assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821232531.3U CN208622794U (en) | 2018-08-01 | 2018-08-01 | Secondary cell and its cap assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208622794U true CN208622794U (en) | 2019-03-19 |
Family
ID=65708420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821232531.3U Active CN208622794U (en) | 2018-08-01 | 2018-08-01 | Secondary cell and its cap assembly |
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| Country | Link |
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| CN (1) | CN208622794U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635073A (en) * | 2019-10-23 | 2019-12-31 | 江西赣锋电池科技有限公司 | Power battery top cover and manufacturing method thereof |
| WO2020199940A1 (en) * | 2019-04-01 | 2020-10-08 | 宁德时代新能源科技股份有限公司 | Top cover component and secondary cell |
| EP3731297A1 (en) * | 2019-04-26 | 2020-10-28 | Contemporary Amperex Technology Co., Limited | Battery module, secondary battery and cap assembly therefor |
| CN112133879A (en) * | 2020-11-02 | 2020-12-25 | 深圳市嘉姆特科技有限公司 | Battery injection molding terminal with novel structure |
| CN112713342A (en) * | 2020-12-31 | 2021-04-27 | 远景动力技术(江苏)有限公司 | Top cover, assembling method thereof and square-shell battery cell |
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2018
- 2018-08-01 CN CN201821232531.3U patent/CN208622794U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020199940A1 (en) * | 2019-04-01 | 2020-10-08 | 宁德时代新能源科技股份有限公司 | Top cover component and secondary cell |
| US11757157B2 (en) | 2019-04-01 | 2023-09-12 | Contemporary Amperex Technology Co., Limited | Cap assembly and secondary battery |
| EP3731297A1 (en) * | 2019-04-26 | 2020-10-28 | Contemporary Amperex Technology Co., Limited | Battery module, secondary battery and cap assembly therefor |
| US11258143B2 (en) | 2019-04-26 | 2022-02-22 | Contemporary Amperex Technology Co., Limited | Battery module, secondary battery and cap assembly thereof |
| JP2022522494A (en) * | 2019-04-26 | 2022-04-19 | 寧徳時代新能源科技股▲分▼有限公司 | Battery module, secondary battery and its top lid assembly |
| JP7239728B2 (en) | 2019-04-26 | 2023-03-14 | 寧徳時代新能源科技股▲分▼有限公司 | Battery module, secondary battery and its upper lid assembly |
| CN110635073A (en) * | 2019-10-23 | 2019-12-31 | 江西赣锋电池科技有限公司 | Power battery top cover and manufacturing method thereof |
| CN112133879A (en) * | 2020-11-02 | 2020-12-25 | 深圳市嘉姆特科技有限公司 | Battery injection molding terminal with novel structure |
| CN112713342A (en) * | 2020-12-31 | 2021-04-27 | 远景动力技术(江苏)有限公司 | Top cover, assembling method thereof and square-shell battery cell |
| CN112713342B (en) * | 2020-12-31 | 2023-09-01 | 远景动力技术(江苏)有限公司 | Top cover, assembly method thereof and square-shell battery cell |
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