CN208256740U - Secondary cell and cap assembly for it - Google Patents

Secondary cell and cap assembly for it Download PDF

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Publication number
CN208256740U
CN208256740U CN201820763800.2U CN201820763800U CN208256740U CN 208256740 U CN208256740 U CN 208256740U CN 201820763800 U CN201820763800 U CN 201820763800U CN 208256740 U CN208256740 U CN 208256740U
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CN
China
Prior art keywords
groove
lamina tecti
main part
cap assembly
hole
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Active
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CN201820763800.2U
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Chinese (zh)
Inventor
邢承友
郑于炼
王鹏
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Priority to CN201820763800.2U priority Critical patent/CN208256740U/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

Abstract

The utility model provides a kind of secondary cell and the cap assembly for it.Cap assembly includes lamina tecti, first electrode terminal and the first fixed plate.Lamina tecti has first boss, the first groove and first through hole, and first boss is upwardly extended from the upper surface of lamina tecti, and the first groove is recessed upwards from the lower surface of lamina tecti, and first through hole extends upwardly to the top surface of first boss from the bottom wall of the first groove.First electrode terminal includes the first main part, and the first main part is contained in the first groove.First fixed plate is fixed on lamina tecti and has the second through-hole vertically extended;In the up-down direction, between the bottom wall and the first fixed plate of the first groove, the first main part exposes the first main body section via the second through-hole.Secondary cell includes the cap assembly, electrode assembly and shell;Shell has opening, and electrode assembly is contained in shell and is electrically connected to first electrode terminal, and the lamina tecti of cap assembly is fixed on shell and closes the opening.

Description

Secondary cell and cap assembly for it
Technical field
The utility model relates to field of batteries more particularly to a kind of secondary cell and for 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 for protruding from lamina tecti, for setting with outside Standby electrical connection.In order to realize the charge and discharge of electrode assembly, electrode terminal then needs to penetrate through lamina tecti and extend to the inside of shell, Electrode assembly and external equipment to be electrically connected.But in the prior art, in order to realize the installation and connection of electrode terminal, Electrode terminal can occupy the inner space of secondary cell, reduce the energy density of secondary 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 for it Cap assembly, can reduce electrode terminal occupancy inner space, improve the energy density of secondary cell.
To achieve the goals above, the utility model provides a kind of secondary cell and the cap assembly for it.Wherein, Cap assembly includes lamina tecti, first electrode terminal and the first fixed plate.Lamina tecti has first boss, the first groove and the One through-hole, first boss are upwardly extended from the upper surface of lamina tecti, and the first groove is recessed upwards from the lower surface of lamina tecti, and first Through-hole extends upwardly to the top surface of first boss from the bottom wall of the first groove.First electrode terminal include the first main part, first Main part is contained in the first groove.First fixed plate is fixed on lamina tecti and has the second through-hole vertically extended; In the up-down direction, the first main body section is between the bottom wall and the first fixed plate of the first groove, and the first main part is via second Through-hole exposes.Secondary cell includes the cap assembly, electrode assembly and shell;Shell has opening, electrode assembly receiving In in shell and being electrically connected to first electrode terminal, the lamina tecti of cap assembly is fixed on shell and closes the opening.
The beneficial effects of the utility model are as follows: in secondary cell according to the present utility model and for its cap assembly In, the first main part is fixed in the first groove by the first fixed plate;Since the first main part of first electrode terminal is received completely It is dissolved in the first groove, the position of the first main part is higher than the lower surface of lamina tecti, so first electrode terminal will not occupy two The energy density of secondary cell is improved to reserve more spaces to electrode assembly in the inner space of primary cell.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the first embodiment of the secondary cell of the utility model.
Fig. 2 is the exploded view of cap assembly in Fig. 1.
Fig. 3 is the schematic diagram of a part of cap assembly in Fig. 1.
Fig. 4 is the exploded view of Fig. 3.
Fig. 5 is the schematic diagram of another part of cap assembly in Fig. 1.
Fig. 6 is the exploded view of Fig. 5.
Fig. 7 is the schematic diagram according to the second embodiment of the secondary cell of the utility model.
Fig. 8 is the schematic diagram of a part of cap assembly in Fig. 7.
Fig. 9 is the schematic diagram according to the 3rd embodiment of the secondary cell of the utility model.
Figure 10 is the schematic diagram of a part of cap assembly in Fig. 9.
Figure 11 is the schematic diagram according to the fourth embodiment of the secondary cell of the utility model.
Figure 12 is the schematic diagram of a part of cap assembly in Figure 11.
Figure 13 is the exploded view of cap assembly in Figure 11.
Wherein, the reference numerals are as follows:
1 cap assembly, 143 first extension
11 lamina tecti, 15 first separator
111 first boss, 151 first isolation part
112 first groove, 152 second isolation part
1121 bottom wall, 153 third isolation part
113 first through hole, 16 second electrode terminal
114 second groove, 161 second main part
115 second boss, 162 second protrusion
116 third groove, 17 second fixed plate
1161 bottom wall, 171 fifth hole
117 fourth hole, 18 second separator
12 first electrode terminal, 19 second seal
121 first main part 1A insulation frame
1211 first end daughter board, 2 electrode assembly
1212 second end daughter board, 21 body part
122 first protrusion, 22 tab
13 first fixed plate, 3 shell
131 second through-hole, 4 switching piece
14 upper surfaces first seal S1
141 first lower surfaces sealing S2
142 third through-hole Z up and down directions
Specific embodiment
With reference to the accompanying drawings the secondary cell of the utility model is described in detail and for the cap assembly of secondary cell.
Fig. 1 to Fig. 6 is the schematic diagram of the first embodiment of secondary cell.
Referring to Fig.1, the secondary cell of the present embodiment includes cap assembly 1, electrode assembly 2 and shell 3.
Electrode assembly 2 includes body part 21 and the tab 22 stretched out from body part 21.Body part 21 include positive plate, Negative electrode tab and diaphragm, diaphragm are set between positive plate and negative electrode tab.Positive plate, diaphragm and negative electrode tab sequentially can be stacked and be rolled up Around for jelly web-like, to form the body part 21 of electrode assembly 2.
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).Tab 22 includes positive pole ear and negative lug, and positive pole ear is connected to plus plate current-collecting body, and negative lug connects It is connected to negative current collector.The edge of plus plate current-collecting body can have the blank area not covered by positive electrode active materials, positive pole ear It can directly be formed by cutting the blank area.Likewise, negative lug can directly by cutting negative current collector blank area It is formed.
It is formed with accommodation space inside shell 3, and there is opening at one end.Electrode assembly 2 can be placed via the opening Into the accommodation space.Shell 3 can be cylindric, hexahedron shape or other shapes.
Referring to Fig. 2, cap assembly 1 includes lamina tecti 11, first electrode terminal 12 and the first fixed plate 13.
Referring to Fig. 3 and Fig. 4, lamina tecti 11 has first boss 111, the first groove 112 and first through hole 113, and first is convex Platform 111 is upwardly extended from the upper surface S1 of lamina tecti 11, and the first groove 112 is recessed upwards from the lower surface S2 of lamina tecti 11, the One through-hole 113 extends upwardly to the top surface of first boss 111 from the bottom wall 1121 of the first groove 112.Stamping top cover plate can be passed through 11 lower surface S2 forms the first groove 112 and first boss 111.
First electrode terminal 12 includes the first main part 121, and the first main part 121 is contained in the first groove 112.First Fixed plate 13 is fixed on lamina tecti 11 and has the second through-hole 131 that Z extends along the vertical direction;In above-below direction on Z, first is main Body portion 121 is located between the bottom wall 1121 and the first fixed plate 13 of the first groove 112, and the first main part 121 is via the second through-hole 131 expose.
The sectional area of first main part 121 is greater than the sectional area of first through hole 113, so the bottom wall of the first groove 112 1121 can limit the first main part 121 from upside, and the first fixed plate 13 supports the first main part 121 from downside, so the One main part 121 is fixed in the first groove 112.
Since the first main part 121 of first electrode terminal 12 is contained in completely in the first groove 112, the first main part 121 position is higher than the lower surface S2 of lamina tecti 11, so first electrode terminal 12 will not occupy the inner space of secondary cell, To reserve more spaces to electrode assembly 2, the energy density of secondary cell is improved.
Secondary cell may also include switching piece 4, and switching piece 4 connects the first main part 121 and tab 22.Due to the first main body Portion 121 exposes via the second through-hole 131, so switching piece 4 can be welded in the bottom surface of the first main part 121.
In practical applications, multiple secondary cells can link together via busbar, to form battery modules.Example Such as, busbar can be connect with the first main part 121 of two neighboring secondary cell, thus by two secondary cell parallel connections.Confluence The settable protrusion of item, the protrusion insertion first through hole 113 are simultaneously welded in the first main part 121.
Lamina tecti 11 also has the second groove 114 being recessed upwards from the lower surface S2 of lamina tecti 11,114 ring of the second groove It is wound on the periphery of the first groove 112, and the depth that the second groove 114 is recessed upwards is less than the depth that the first groove 112 is recessed upwards Degree.Second groove 114 is ring-type, and the first groove 112 is the circular center of the second groove 114.
First fixed plate 13 is fixed on the cell wall of the second groove 114.By the way that the second groove 114 is arranged, first can reduce 13 the space occupied of fixed plate reduces the whole height of cap assembly 1.Preferably, the bottom surface of the first fixed plate 13 and lamina tecti 11 lower surface S2 is flushed, and such first fixed plate 13 will not occupy the inner space of secondary cell, is further increased secondary The energy density of battery.
First fixed plate 13 is welded and fixed and seals with lamina tecti 11.Specifically, the first fixed plate 13 can pass through Laser Welding Connect the cell wall for being fixed on the second groove 114.Wherein, the first fixed plate 13 and the contact surface of the cell wall of the second groove 114 integrally weld It connects, so that the first fixed plate 13 and the join domain of lamina tecti 11 be made to be fully sealed.
Cap assembly 1 further includes first seal 14, and first seal 14 includes the first sealing 141 and third through-hole 142;First about 141 sealing is held between the first main part 121 and the first fixed plate 13, and about 142 third through-hole passes through Logical first sealing 141.When assembly, the first fixed plate 13 is providing the same of support force from lower the first sealing of side compression 141 When, realize the sealing of first electrode terminal 12.First sealing 141 is annular.First sealing 141 can also be by the first main body Portion 121 and the first fixed plate 13 insulate.
The projection of third through-hole 142 and the second through-hole 131 Z along the vertical direction are least partially overlapped.Specifically, reference Fig. 3, Third through-hole 142 is connected to the second about 131 through-hole, and therefore, referring to Fig.1, switching piece 4 can be via the second through-hole 131 and third Through-hole 142 is welded in the first main part 121.
Referring to Fig. 3 and Fig. 4, the first main part 121 includes first end daughter board 1211 and second end daughter board 1212, first terminal Plate 1211 and second end daughter board 1212 are stacked on top of one another and be linked together, and the material of first end daughter board 1211 and second end daughter board 1212 material is different metal.Preferably, first end daughter board 1211 can be made of copper, and second end daughter board 1212 can be by aluminum At in other words, the first main part 121 is copper-aluminum composite board.
First main part 121 is electrically coupleable to the negative electrode tab of electrode assembly 2.Specifically, the negative current collector of negative electrode tab and Negative lug is usually copper foil, since different types of metal is difficult to weld, so the material of switching piece 4 is copper;And due to converging Stream item is commonly made from aluminium, so for the ease of the first main part 121 of welding, busbar and switching piece 4, the first main part 121 Preferably copper-aluminum composite board.Since the joint face of first end daughter board 1211 and second end daughter board 1212 is weak area, if First end daughter board 1211 for a long time by downward tensile stress (for example, pulling force that tab 22 applies first end daughter board 1211), that First end daughter board 1211 and second end daughter board 1212 may crack at joint face;And the first fixed plate of the application 13 can support first end daughter board 1211 from downside, to reduce between first end daughter board 1211 and second end daughter board 1212 Power prevents first end daughter board 1211 and second end daughter board 1212 from separating.
Cap assembly 1 further includes the first separator 15, and the first separator 15 includes the first isolation part 151, is contained in first Groove 112 simultaneously separates the first main part 121 with lamina tecti 11.First separator 15 can be made of insulated plastic.
Further, referring to Figures 1 and 2, cap assembly 1 further includes second electrode terminal 16, the second fixed plate 17 and Two separators 18.Referring to figure 5 and figure 6, lamina tecti 11 also has second boss 115, third groove 116 and fourth hole 117, the Two boss 115 are upwardly extended from the upper surface S1 of lamina tecti 11, and the lower surface S2 of third groove 116 from lamina tecti 11 is concave up It falls into, fourth hole 117 extends upwardly to the top surface of second boss 115 from the bottom wall 1161 of third groove 116.Second electrode terminal 16 include the second main part 161, and the second main part 161 is contained in third groove 116.Second fixed plate 17 is fixed on lamina tecti 11 and have along the vertical direction Z extend fifth hole 171;In above-below direction on Z, the second main part 161 is located at third groove Between 116 bottom wall 1161 and the second fixed plate 17, the second main part 161 exposes via fifth hole 171.Second separator 18 Lamina tecti 11 and the second fixed plate 17 are separated with second electrode terminal 16.
The sectional area of second main part 161 is greater than the sectional area of fourth hole 117, so the bottom wall of third groove 116 1161 can limit the second main part 161 from upside, and the second fixed plate 17 supports the second main part 161 from downside, so the Two main parts 161 are fixed in third groove 116.
Since the second main part 161 of second electrode terminal 16 is contained in completely in third groove 116, the second main part 161 position is higher than the lower surface S2 of lamina tecti 11, so second electrode terminal 16 will not occupy the inner space of secondary cell, To reserve more spaces to electrode assembly 2, the energy density of secondary cell is improved.
At least one is insulating part for first separator 15 and the second separator 18, to avoid first electrode terminal 12 and second Electrode terminal 16 is connected with lamina tecti 11 simultaneously, prevents short circuit.The structure of second separator 18 can be with the first separator 15 Structure is identical.
Second electrode terminal 16 can also be electrically connected via another switching piece 4 with the tab 22 of electrode assembly 2.
Referring to figure 5 and figure 6, cap assembly 1 further includes second seal 19, and be held on second electrode terminal 16 second is main Between body portion 161 and the second fixed plate 17.Second seal 19 is identical as the structure of first seal 14.
Referring to Figures 1 and 2, cap assembly 1 further includes isolation frame 1A, is fixed on 11 downside of lamina tecti.Isolation frame 1A is used for The body part 21 of lamina tecti 11 and electrode assembly 2 is separated.
Fig. 7 and Fig. 8 is the schematic diagram of the second embodiment of secondary cell.
The structure of the secondary cell of the secondary cell and first embodiment of the present embodiment is essentially identical, and the main distinction embodies In first seal 14 and the first separator 15.
In the present embodiment, first seal 14 includes the first sealing 141, third through-hole 142 and the first extension 143.First about 141 sealing is held between the first main part 121 and the first fixed plate 13, and the first extension 143 is from The lower surface of one sealing 141 extends downward and through the second through-hole 131.First sealing 141 up and down of third through-hole 142 With an extension 143.First extension 143 has positioning action, can simplify the dress of first seal 14 and the first fixed plate 13 Match.
First separator 15 includes the first isolation part 151 and the second isolation part 152.First isolation part 151 is contained in first Groove 112 simultaneously separates the first main part 121 with lamina tecti 11.Second isolation part 152 be connected with the first isolation part 151 and up and down It is held between the first main part 121 and the first fixed plate 13, so that the first main part 121 and the first fixed plate 13 be separated.
The structure of second separator 18 can be identical as the structure of the first separator 15, and the structure of second seal 19 can be with The structure of one sealing element 14 is identical.Alternatively, of course, second separator 18 of the present embodiment can also be with the of first embodiment Two separators 18 are identical, and the second seal 19 of the present embodiment can also be identical as the second seal 19 of first embodiment.
Fig. 9 and Figure 10 is the schematic diagram of the 3rd embodiment of secondary cell.
The structure of the secondary cell of the secondary cell and second embodiment of the present embodiment is essentially identical, and the main distinction embodies In first electrode terminal 12.
First electrode terminal 12 includes the first main part 121 and the first protrusion 122, and the first main part 121 is contained in the In one groove 112, the first protrusion 122 is connected to the first main part 121 and is upward through first through hole 113.
In the present embodiment, since the first protrusion 122 protrudes into the upside of lamina tecti 11, busbar directly welds In the first protrusion 122, the protrusion that no setting is required, to simplify the structure and assembly technology of busbar.
Meanwhile first first isolation part 151 of separator 15 also extend into first through hole 113, by the first protrusion 122 It is separated with lamina tecti 11.
Second electrode terminal 16 may also comprise the second main part 161 and the second protrusion 162, the receiving of the second main part 161 In in third groove 116, the second protrusion 162 is connected to the second main part 161 and is upward through fourth hole 117.Certainly, it can replace The structure of Dai Di, the second electrode terminal 16 of the present embodiment can also be with the structure phases of the second electrode terminal 16 of first embodiment Together.
Figure 11 to Figure 13 is the schematic diagram of the fourth embodiment of secondary cell.
The structure of the secondary cell of the secondary cell and 3rd embodiment of the present embodiment is essentially identical, and the main distinction embodies In the first separator 15.
First separator 15 includes the first isolation part 151, the second isolation part 152 and third isolation part 153.First isolation part First main part 121 is separated with lamina tecti 11, separates the first protrusion 122 with lamina tecti 11 by 151.On second isolation part 152 Under be held between the first main part 121 and the first fixed plate 13, thus by the first main part 121 and the first fixed plate 13 every It opens.Third isolation part 153 is connected with the first isolation part 151 and coats top surface and the outer peripheral surface of first boss 111.
When busbar and first boss 111 are welded, third isolation part 153 can prevent busbar from contacting with lamina tecti 11, Improve isolation performance.
First separator 15 can be formed by integrated through injection molding.For example, when assembly, it can be first with fixture by first electrode terminal 12 It is positioned with lamina tecti 11, then forms the first separator 15 by being moulded between first electrode terminal 12 and lamina tecti 11.
The structure of second separator 18 can be identical as the structure of the first separator 15.

Claims (10)

1. a kind of cap assembly (1) for secondary cell, which is characterized in that including lamina tecti (11), first electrode terminal (12) and the first fixed plate (13);
Lamina tecti (11) has first boss (111), the first groove (112) and a first through hole (113), first boss (111) from The upper surface (S1) of lamina tecti (11) upwardly extends, and the first groove (112) is recessed upwards from the lower surface (S2) of lamina tecti (11), First through hole (113) extends upwardly to the top surface of first boss (111) from the bottom wall (1121) of the first groove (112);
First electrode terminal (12) includes the first main part (121), and the first main part (121) is contained in the first groove (112);
First fixed plate (13) is fixed on lamina tecti (11) and has the second through-hole (131) that (Z) extends along the vertical direction;Upper On lower direction (Z), the first main part (121) is located between the bottom wall (1121) and the first fixed plate (13) of the first groove (112), First main part (121) exposes via the second through-hole (131).
2. cap assembly (1) according to claim 1, which is characterized in that
Lamina tecti (11) also has the second groove (114) being recessed upwards from the lower surface (S2) of lamina tecti (11), the second groove (114) it is looped around the periphery of the first groove (112), and the depth that the second groove (114) is recessed upwards is less than the first groove (112) The depth being recessed upwards;
First fixed plate (13) is fixed on the cell wall of the second groove (114).
3. cap assembly (1) according to claim 2, which is characterized in that the first fixed plate (13) and lamina tecti (11) are welded It connects fixed and seals.
4. cap assembly (1) according to claim 1 or 2, which is characterized in that
Cap assembly (1) further includes first seal (14), and first seal (14) includes that the first sealing (141) and third are logical Hole (142);First sealing (141) is held between the first main part (121) and the first fixed plate (13) up and down, third through-hole (142) the first sealing (141) up and down;The projection of third through-hole (142) and the second through-hole (131) (Z) along the vertical direction It is least partially overlapped.
5. cap assembly (1) according to claim 4, which is characterized in that the first main part (121) includes first end daughter board (1211) and second end daughter board (1212), first end daughter board (1211) and second end daughter board (1212) are stacked on top of one another and be linked as one Body, and the material of first end daughter board (1211) and the material of second end daughter board (1212) they are different metals.
6. cap assembly (1) according to claim 1, which is characterized in that cap assembly (1) further includes the first separator (15), the first separator (15) includes the first isolation part (151), is contained in the first groove (112) and by the first main part (121) It is separated with lamina tecti (11).
7. cap assembly (1) according to claim 6, which is characterized in that the first separator (15) further includes the second isolation Portion (152) is connected with the first isolation part (151) and separates the first main part (121) and the first fixed plate (13).
8. cap assembly (1) according to claim 6, which is characterized in that the first separator (15) further includes third isolation Portion (153) is connected with the first isolation part (151) and coats top surface and the outer peripheral surface of first boss (111).
9. cap assembly (1) according to claim 1, which is characterized in that cap assembly (1) further includes second electrode terminal (16), the second fixed plate (17) and the second separator (18);
Lamina tecti (11) also has second boss (115), third groove (116) and fourth hole (117), second boss (115) It is upwardly extended from the upper surface (S1) of lamina tecti (11), the lower surface (S2) of third groove (116) from lamina tecti (11) is concave up It falls into, fourth hole (117) extends upwardly to the top surface of second boss (115) from the bottom wall (1161) of third groove (116);
Second electrode terminal (16) includes the second main part (161), and the second main part (161) is contained in third groove (116);
Second fixed plate (17) is fixed on lamina tecti (11) and has the fifth hole (171) that (Z) extends along the vertical direction;Upper On lower direction (Z), the second main part (161) is located between the bottom wall (1161) of third groove (116) and the second fixed plate (17), Second main part (161) exposes via fifth hole (171);
Second separator (18) separates lamina tecti (11) and the second fixed plate (17) with second electrode terminal (16).
10. a kind of secondary cell, which is characterized in that including cap assembly of any of claims 1-9 (1), electrode Component (2) and shell (3);
Shell (3) has opening, and electrode assembly (2) is contained in shell (3) and is electrically connected to first electrode terminal (12), top cover The lamina tecti (11) of component (1) is fixed on shell (3) and closes the opening.
CN201820763800.2U 2018-05-22 2018-05-22 Secondary cell and cap assembly for it Active CN208256740U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201820763800.2U CN208256740U (en) 2018-05-22 2018-05-22 Secondary cell and cap assembly for it

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021068436A1 (en) * 2019-10-10 2021-04-15 宁德新能源科技有限公司 Battery casing assembly and battery having the battery casing assembly
WO2021082218A1 (en) * 2019-10-28 2021-05-06 惠州亿纬锂能股份有限公司 Sealing assembly and lithium ion battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021068436A1 (en) * 2019-10-10 2021-04-15 宁德新能源科技有限公司 Battery casing assembly and battery having the battery casing assembly
JP2022505993A (en) * 2019-10-10 2022-01-17 寧徳新能源科技有限公司 Battery housing assembly and battery with it
JP7104139B2 (en) 2019-10-10 2022-07-20 寧徳新能源科技有限公司 Battery housing assembly and battery with it
WO2021082218A1 (en) * 2019-10-28 2021-05-06 惠州亿纬锂能股份有限公司 Sealing assembly and lithium ion battery

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