Battery and cover plate assembly thereof

Abstract

The utility model discloses a cover plate assembly which comprises a cover plate, a tab lead-out hole is arranged on the cover plate, a tab adapter is arranged in the tab lead-out hole, the tab adapter and the cover plate are insulated and sealed, a tab adapter hole is arranged in the tab adapter, and the tab adapter hole is communicated with the tab lead-out hole. And the geometric dimensions of the tab transfer holes are gradually reduced from inside to outside. The utility model further discloses a battery which comprises a battery body, the battery body comprises a shell and a battery cell, the shell comprises an outer shell and a cover plate assembly covering the outer shell, the cover plate assembly adopts the cover plate assembly, the battery cell is provided with tabs, and the tabs are arranged on the battery cell. Pole columns matched with the pole lug adapter holes are welded on the pole lugs; and the pole columns and the pole lug adapter pieces are welded and sealed by a circle. The battery and the cover plate assembly thereof disclosed by the utility model have the advantages of simple structure and convenience in assembly, and the sealing performance and the electrical connection performance of the tabs can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically a battery and its cover plate assembly. Background Technology

[0002] A battery comprises a casing and battery cells housed within the casing. The casing includes an outer shell surrounding the battery cells and a cover assembly covering the outer shell. The cover assembly is a crucial functional component of the battery, housing elements such as tabs and explosion-proof valves. Since the tabs are the connection terminals between the battery cells and external circuits, they require insulation. Furthermore, holes need to be made in the cover to allow the tabs to extend, and the tabs must be sealed to prevent leakage of internal substances such as electrolyte. Therefore, the structure of the cover assembly at the tab extension points is often complex, requiring intricate insulation and sealing structures while ensuring proper electrical connection between the tabs and the battery cells, as well as between the tabs and external circuits. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a battery and its cover assembly, which has the advantages of simple structure and convenient assembly, and can ensure the sealing performance and electrical connection performance of the tabs.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model first proposes a cover plate assembly, including a cover plate, the cover plate having at least one electrode lead-out hole, the electrode lead-out hole having an electrode adapter, the electrode adapter being insulated and sealed from the cover plate, and the electrode adapter having an electrode adapter hole, the geometric dimensions of the electrode adapter hole gradually decreasing from the inside to the outside.

[0006] Furthermore, an insulating seal is provided between the electrode adapter and the cover plate, which surrounds the electrode outlet hole.

[0007] Furthermore, the outer peripheral wall of the insulating seal is provided with a first groove that surrounds the periphery. The bottom of the first groove is sealed to the inner wall of the lead-out hole of the electrode tab, and the two side walls of the first groove are respectively sealed to the inner and outer sides of the cover plate.

[0008] Furthermore, the inner wall of the electrode lead-out hole and / or at least one side surface of the cover plate are provided with a first sealing protrusion and a first sealing groove that cooperate with the insulating seal; and / or,

[0009] The inner wall of the lead-out hole of the electrode tab and / or at least one side of the cover plate are provided as rough surfaces that mate with the insulating seal.

[0010] Furthermore, the outer peripheral wall of the electrode adapter is provided with a second groove that surrounds the insulating seal and mates with it. The bottom of the second groove is in sealing fit with the inner wall of the insulating seal, and the two side walls of the second groove are respectively in sealing fit with the inner and outer sides of the insulating seal.

[0011] Furthermore, the bottom of the second groove and / or at least one sidewall of the second groove are provided with a second sealing protrusion and a second sealing groove that mate with the insulating seal; and / or,

[0012] The bottom of the second groove and / or at least one sidewall of the second groove are provided as rough surfaces that mate with the insulating seal.

[0013] Furthermore, the electrode adapter has a groove inside; and:

[0014] The groove is designed as a single groove that surrounds the electrode adapter hole; or...

[0015] The groove is designed as a single groove that surrounds the electrode adapter hole, and several reinforcing ribs are spaced apart between the two side walls of the groove; or,

[0016] The grooves are multiple and arranged around the tab adapter hole.

[0017] Furthermore, the groove is formed on the inner side of the tab adapter and extends outward along the axial direction of the tab adapter hole.

[0018] Furthermore, the electrode adapter includes an inner adapter and an outer adapter located on the inner and outer sides of the cover plate, respectively, with insulating sealing gaskets provided between the inner adapter and the outer adapter and the cover plate; the electrode adapter hole is provided on the outer adapter, and fasteners for pressing the insulating sealing gaskets are provided at intervals around the electrode adapter hole between the inner adapter and the outer adapter.

[0019] Furthermore, the fastener is a rivet, and the rivet is covered with an insulating sleeve.

[0020] Furthermore, the inner adapter has a through hole, the outer adapter has an adapter portion extending inward through the through hole, the tab adapter hole is disposed in the adapter portion, and there is a gap between the inner wall of the through hole and the outer wall of the adapter portion.

[0021] Furthermore, the cross-sections obtained by any two planes that are parallel to each other and perpendicular to the axis of the electrode adapter hole on the electrode adapter hole are similar cross-sections.

[0022] Furthermore, the top surface of the electrode adapter is provided with a welding boss that surrounds the electrode adapter hole.

[0023] This utility model also proposes a battery, including a battery body, the battery body including a shell and a cell, the shell including an outer shell and a cover plate assembly covering the outer shell, the cover plate assembly adopting the cover plate assembly as described above, the cell having a tab, the tab having a terminal post adapted to the tab adapter hole welded on the tab, the terminal post and the tab adapter being welded and sealed around one circumference.

[0024] Furthermore, the electrode adapter has a groove; the groove opening is opened on the inner side of the electrode adapter and extends outward along the axial direction of the electrode adapter hole; an insulating member is provided between the battery cell and the cover plate, and the insulating member has a first wedge block that cooperates with the groove and is inserted into the groove.

[0025] Furthermore, the electrode adapter includes an inner adapter and an outer adapter located on the inner and outer sides of the cover plate, respectively. The inner adapter has a through hole, and the outer adapter has an adapter portion extending inward through the through hole. The electrode adapter hole is disposed in the adapter portion, and there is a gap between the inner wall of the through hole and the outer wall of the adapter portion. An insulating member is provided between the battery cell and the cover plate, and the insulating member has a second wedge that fits with the gap and is inserted into the gap.

[0026] Furthermore, at least one threaded hole is provided on the top surface of the pole post.

[0027] Furthermore, the battery body is provided with at least one first tab and at least one second tab, and the first tab and the second tab are provided on both end faces of the battery body; or, at least one of the two sides of the battery body is provided with the first tab and the second tab.

[0028] Furthermore, the battery body has a length L, a width H, and a thickness D. The length L of the battery body is greater than the width H, and the width H of the battery body is greater than the thickness D; and satisfies: L / H < 4, L / D < 50.

[0029] The beneficial effects of this utility model are as follows:

[0030] This utility model's battery, by providing tab lead-out holes on the cover plate and installing a tab adapter within the tab lead-out holes, achieves insulation and sealing isolation between the tab adapter and the cover plate through the insulating and sealing fit. By providing tab adapter holes within the tab adapter, and making the geometric dimensions of the tab adapter holes gradually decrease from the inside out, while setting the terminal connecting to the cell tabs as a gradually changing structure adapted to the tab adapter holes, a tight fit between the terminal and the tab adapter holes is ensured, improving electrical connection performance. Furthermore, welding a seal around the terminal and the tab adapter throughout the circumference ensures a tight seal between the terminal and the tab adapter holes. In summary, this utility model's battery has the advantages of simple structure and convenient assembly, and can guarantee the sealing performance of the tabs and electrical connection performance. Attached Figure Description

[0031] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0032] Figure 1 This is a schematic diagram of the structure of the battery embodiment 1 of this utility model;

[0033] Figure 2 for Figure 1 AA section view;

[0034] Figure 3 for Figure 2 Enlarged view of region B;

[0035] Figure 4 This is a structural schematic diagram of the cover plate assembly;

[0036] Figure 5 This is a schematic diagram of the cover plate.

[0037] Figure 6 A first-direction isometric view of the electrode adapter;

[0038] Figure 7 A second-direction isometric view of the electrode adapter;

[0039] Figure 8 This is a schematic diagram of the structure of an insulating seal.

[0040] Figure 9 This is a schematic diagram of the structure of the battery in embodiment 2 of this utility model;

[0041] Figure 10 This is a schematic diagram showing the fit between the cover plate assembly and the battery body.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1-First tab; 2-Second tab; 10-Cell; 11-Taper; 12-Pole post; 121-Threaded hole; 20-Outer shell; 30-Cover plate assembly; 31-Cover plate; 311-Taper lead-out hole; 32-Taper adapter; 321-Taper adapter hole; 322-Second groove; 323-Groove; 324-Welding boss; 33-Insulating seal; 331-First groove; 34-Inner adapter; 341-Through hole; 35-Outer adapter; 351-Adapter part; 36-Insulating gasket; 37-Insulating gasket; 38-Fastener; 39-Insulating sleeve; 40-Insulating component; 41-First wedge; 42-Second wedge. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0045] Example 1

[0046] like Figure 1-8 As shown, the battery of this embodiment includes a battery body, which includes a casing and a cell 10. The casing includes an outer shell 20 and a cover plate assembly 30 covering the outer shell 20. In this embodiment, the cover plate assembly 30 includes a cover plate 31, which has at least one tab lead-out hole 311. A tab adapter 32 is provided in the tab lead-out hole 311. The tab adapter 32 is insulated and sealed from the cover plate 31. The tab adapter 32 has a tab adapter hole 321. The geometric dimensions of the tab adapter hole 321 gradually decrease from the inside to the outside. In this embodiment, the geometric dimensions of the tab adapter hole 321 gradually decrease proportionally from the inside to the outside. The cross-sections obtained by any two planes that are parallel to each other and perpendicular to the axis of the tab adapter hole 321 on the tab adapter hole 321 are similar cross-sections, that is, the outer contours of these cross-sections are geometrically similar. In this embodiment, the battery cell 10 is provided with a tab 11, and a terminal post 12 adapted to the tab adapter hole 321 is welded onto the tab 11. The terminal post 12 and the tab adapter 321 are welded and sealed around each other. Specifically, in this embodiment, the cover plate 31 is provided with a tab lead-out hole 311. In some other embodiments, two or more tab lead-out holes 311 may be provided on the same cover plate 31, which will not be described in detail here.

[0047] In a preferred embodiment of this example, an insulating seal 33 is provided between the electrode adapter 32 and the cover plate 31, surrounding the electrode lead-out hole. In this embodiment, the outer peripheral wall of the insulating seal 33 is provided with a first groove 331 surrounding the electrode lead-out hole. The bottom of the first groove 331 and the inner wall of the electrode lead-out hole, as well as the two side walls of the first groove 331, are respectively sealed to the inner and outer sides of the cover plate 10. Figure 3 and Figure 8 As shown, in this embodiment, the insulating seal 33 is integrally formed with the cover plate 10 and the electrode adapter 32 by injection molding. To improve the connection strength of the insulating seal 33 at the sealing cross-section, a first sealing protrusion and a first sealing groove that mate with the insulating seal 33 can be provided at intervals on the inner wall of the electrode lead-out hole 311 and / or on at least one side of the cover plate 10; and / or, the inner wall of the electrode lead-out hole 311 and / or at least one side of the cover plate 10 are provided as rough surfaces that mate with the insulating seal. In this embodiment, the portions on the inner wall of the electrode lead-out hole 311 and / or on both sides of the cover plate 10 that mate with the insulating seal 33 are all provided with a wavy structure to form the first sealing protrusion and the first sealing groove. At the same time, the portions on the inner wall of the electrode lead-out hole 311 and / or on both sides of the cover plate 10 that mate with the insulating seal 33 are all provided as rough surfaces to enhance the connection strength with the insulating seal 33.

[0048] In a preferred embodiment of this example, the outer peripheral wall of the electrode adapter 32 is provided with a second groove 322 that surrounds and mates with the insulating seal. The bottom of the second groove 322 is in sealing fit with the inner wall of the insulating seal 33, and the two side walls of the second groove 322 are respectively in sealing fit with the inner and outer sides of the insulating seal 33. Figure 3 and Figure 6 As shown. Similarly, to improve the connection strength of the insulating seal 33 at the sealing cross section, a second sealing protrusion and a second sealing groove that cooperate with the insulating seal 33 can be provided on the bottom of the second groove 322 and / or on at least one side wall of the second groove 322; and / or, the bottom of the second groove 322 and / or at least one side wall of the second groove 322 can be provided as a rough surface that cooperates with the insulating seal 33. In this embodiment, the bottom of the second groove 322 and both side walls are provided as a wavy structure to form the second sealing protrusion and the second sealing groove. At the same time, the bottom of the second groove 322 and both side walls are provided as rough surfaces to enhance the connection strength with the insulating seal 33.

[0049] In a preferred embodiment of this invention, the tab adapter 32 has a groove 323 inside. The groove 323 is used to block heat conduction during welding of the pole post 12 and the tab adapter 32, so as to prevent the insulating seal 33 from melting due to the high temperature of welding, thereby affecting the sealing and insulation performance. Figure 3 and Figure 7 As shown. Specifically, there are several ways to set the groove 323. For example, the groove 323 can be set as one and surround the electrode adapter hole 321; or, based on setting the groove 323 as one and surrounding the electrode adapter hole 321, several reinforcing ribs can be provided at intervals between the two side walls of the groove 323 to improve the structural strength; or multiple grooves 323 can be set and arranged around the electrode adapter hole.

[0050] In this embodiment, the groove 323 is formed on the inner side of the tab adapter 32 and extends outward along the axial direction of the tab adapter hole 321. For example... Figure 3 As shown, in this embodiment, an insulating member 40 is provided between the battery cell 10 and the cover plate 31. The insulating member 40 is provided with a first wedge 41 that cooperates with the groove 323 and is inserted into the groove 323, so as to improve the structural strength and the bonding strength between the pole post 12 and the inner wall of the pole tab adapter hole 321, thereby improving the power connection performance.

[0051] like Figure 4 As shown, in a preferred embodiment of this example, the top surface of the electrode adapter 32 is provided with a welding boss 324 surrounding the electrode adapter hole 321, so as to facilitate welding between the electrode adapter 32 and the electrode post 12. At the same time, it can also increase the rate of heat conduction from welding to the external environment and extend the distance from the welding position to the insulating seal 33, further preventing the insulating seal 33 from melting and deforming due to welding heat.

[0052] like Figure 4 As shown, in this embodiment, at least one threaded hole 121 is provided on the top surface of the pole post 12. When assembling the cover plate assembly, a threaded connector is connected to the threaded hole 121 to apply an outward pulling force to the pole post 12, thereby improving the connection performance between the pole post 12 and the tab adapter hole 321.

[0053] like Figure 1 As shown, in this embodiment, the battery body is provided with at least one first tab 1 and at least one second tab 2. The first tab 1 and the second tab 2 are provided on both end faces of the battery body, meaning the first tab 1 and the second tab 2 are disposed on the end faces of the battery body along its width direction. In the casing, the side with the tabs is provided with a cover plate assembly. Specifically, one first tab 1 and one second tab 2 are each provided, and the first tab 1 and the second tab 2 are respectively disposed on both end faces of the battery body. Of course, in some other embodiments, at least two first tabs 1 and two tabs 2 can be provided, and the first tab 1 and the second tab 2 can be simultaneously disposed on the same end face of the battery body, which will not be elaborated further. In some other embodiments, the first tab 1 and the second tab 2 can also be disposed on the side of the battery body along its length direction, meaning that at least one side of the battery body has a first tab and a second tab. Specifically, as shown... Figure 9 As shown, there are two first tabs 1 and two second tabs 2. The two first tabs 1 are located on one side of the battery body, and the two second tabs are located on the other side of the battery body. Of course, the first tabs 1 and the second tabs 2 can also be located on the same side of the battery body.

[0054] In this embodiment, the battery body has a length L, a width H, and a thickness D. The length L of the battery body is greater than the width H, and the width H of the battery body is greater than the thickness D; and satisfies: L / H < 4, L / D < 50.

[0055] Example 2

[0056] like Figure 9-10 As shown, the battery of this embodiment includes a battery body, which includes a casing and a cell 10. The casing includes an outer shell 20 and a cover plate assembly 30 covering the outer shell 20. In this embodiment, the cover plate assembly 30 includes a cover plate 31, on which a tab lead-out hole 311 is provided. A tab adapter 32 is provided inside the tab lead-out hole 311. The tab adapter 32 is insulated and sealed with the cover plate 31. The tab adapter 32 is provided with a tab adapter hole 321. The geometric dimensions of the tab adapter hole 321 gradually decrease from the inside to the outside. In this embodiment, the geometric dimensions of the tab adapter hole 321 gradually decrease proportionally from the inside to the outside. The cross-sections obtained by any two planes that are parallel to each other and perpendicular to the axis of the tab adapter hole 321 on the tab adapter hole 321 are similar cross-sections, that is, the outer contours of these cross-sections are geometrically similar. In this embodiment, the battery cell 10 is provided with a tab 11, and a terminal post 12 adapted to the tab adapter hole 321 is welded onto the tab 11. The terminal post 12 and the tab adapter 321 are welded and sealed around each other. Specifically, in this embodiment, the cover plate 31 is provided with two tab lead-out holes 311. In some other embodiments, one, three or more tab lead-out holes 311 may be provided on the same cover plate 31, which will not be described in detail here.

[0057] like Figure 10 As shown, in this embodiment, the electrode adapter 32 includes an inner adapter 34 and an outer adapter 35 located on the inner and outer sides of the cover plate, respectively. Insulating sealing gaskets 36 and 37 are respectively provided between the inner adapter 34 and the outer adapter 35 and the cover plate 10. The electrode adapter hole 321 is provided on the outer adapter 35. Fasteners 38 for pressing the insulating sealing gaskets 36 and 37 are provided at intervals around the electrode adapter hole 321 between the inner adapter 34 and the outer adapter 35. In this embodiment, the fasteners 38 are rivets, and the rivets are covered with insulating sleeves 39.

[0058] like Figure 10 As shown, in this embodiment, the inner adapter 34 has a through hole 341, and the outer adapter 35 has an adapter portion 351 extending inward through the through hole. The electrode tab adapter hole 321 is disposed in the adapter portion 351, and there is a gap between the inner wall of the through hole 341 and the outer wall of the adapter portion 351. An insulating member 40 is provided between the battery cell 10 and the cover plate 31. The insulating member 40 has a second wedge 42 that fits with the gap and is inserted into the gap to improve the structural strength and the bonding strength between the electrode post 12 and the inner wall of the electrode tab adapter hole 321, thereby improving the electrical connection performance.

[0059] Other implementation methods in this embodiment are the same as or equivalent to those in Embodiment 1, and will not be described in detail hereafter.

[0060] Note: In this article, "inner" refers to the direction towards the inside of the battery body, and "outer" refers to the direction towards the outside of the battery body; "connection performance" includes properties such as connection structure strength, increasing current flow area, reducing resistance and heat generation.

[0061] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A cover plate assembly, characterized in that: The device includes a cover plate, which has at least one tab lead-out hole. A tab adapter is provided inside the tab lead-out hole. The tab adapter is insulated and sealed from the cover plate. The tab adapter has a tab adapter hole inside it. The geometric dimensions of the tab adapter hole gradually decrease from the inside to the outside.

2. The cover plate assembly according to claim 1, characterized in that: An insulating seal is provided between the electrode adapter and the cover plate, surrounding the electrode outlet hole.

3. The cover plate assembly according to claim 2, characterized in that: The outer peripheral wall of the insulating seal is provided with a first groove that surrounds the entire periphery. The bottom of the first groove is sealed to the inner wall of the lead-out hole of the electrode tab, and the two side walls of the first groove are respectively sealed to the inner and outer sides of the cover plate.

4. The cover plate assembly according to claim 3, characterized in that: The inner wall of the electrode lead-out hole and / or at least one side surface of the cover plate are provided with a first sealing protrusion and a first sealing groove that cooperate with the insulating seal; and / or, The inner wall of the lead-out hole of the electrode tab and / or at least one side of the cover plate are provided as rough surfaces that mate with the insulating seal.

5. The cover plate assembly according to claim 2, characterized in that: The outer peripheral wall of the electrode adapter is provided with a second groove that surrounds the insulating seal and mates with it. The bottom of the second groove is sealed to the inner wall of the insulating seal, and the two side walls of the second groove are respectively sealed to the inner and outer sides of the insulating seal.

6. The cover plate assembly according to claim 5, characterized in that: The bottom of the second groove and / or at least one sidewall of the second groove are provided with a second sealing protrusion and a second sealing groove that mate with the insulating seal; and / or, The bottom of the second groove and / or at least one sidewall of the second groove are provided as rough surfaces that mate with the insulating seal.

7. The cover plate assembly according to any one of claims 1-6, characterized in that: The electrode adapter has a groove inside; and: The groove is designed as a single groove that surrounds the electrode adapter hole; or... The groove is designed as a single groove that surrounds the electrode adapter hole, and several reinforcing ribs are spaced apart between the two side walls of the groove; or, The grooves are multiple and arranged around the tab adapter hole.

8. The cover plate assembly according to claim 7, characterized in that: The groove is formed on the inner side of the tab adapter and extends outward along the axial direction of the tab adapter hole.

9. The cover plate assembly according to claim 1, characterized in that: The electrode adapter includes an inner adapter and an outer adapter located on the inner and outer sides of the cover plate, respectively. An insulating sealing gasket is provided between the inner adapter and the outer adapter and the cover plate. The electrode adapter hole is provided on the outer adapter. Fasteners for pressing the insulating sealing gasket are provided at intervals around the electrode adapter hole between the inner adapter and the outer adapter.

10. The cover plate assembly according to claim 9, characterized in that: The fastener is a rivet, and the rivet is covered with an insulating sleeve.

11. The cover plate assembly according to claim 9, characterized in that: The inner adapter has a through hole, and the outer adapter has an adapter portion extending inward through the through hole. The electrode adapter hole is located inside the adapter portion, and there is a gap between the inner wall of the through hole and the outer wall of the adapter portion.

12. The cover plate assembly according to claim 1, characterized in that: The cross sections obtained by any two planes that are parallel to each other and perpendicular to the axis of the electrode adapter hole on the electrode adapter hole are similar cross sections.

13. The cover plate assembly according to claim 1, characterized in that: The top surface of the electrode adapter is provided with a welding boss that surrounds the electrode adapter hole.

14. A battery comprising a battery body, the battery body including a housing and a battery cell, the housing including an outer shell and a cover plate assembly covering the outer shell, characterized in that: The cover plate assembly is the cover plate assembly as described in any one of claims 1-13, the battery cell is provided with a tab, the tab is welded with a pole post adapted to the tab adapter hole, and the pole post and the tab adapter are welded and sealed around one circumference.

15. The battery according to claim 14, characterized in that: The electrode adapter has a groove inside; the groove opening is opened on the inner side of the electrode adapter and extends outward along the axial direction of the electrode adapter hole; an insulating member is provided between the battery cell and the cover plate, and the insulating member is provided with a first wedge block that cooperates with the groove and is inserted into the groove.

16. The battery according to claim 14, characterized in that: The electrode adapter includes an inner adapter and an outer adapter located on the inner and outer sides of the cover plate, respectively. The inner adapter has a through hole, and the outer adapter has an adapter portion extending inward through the through hole. The electrode adapter hole is located in the adapter portion, and there is a gap between the inner wall of the through hole and the outer wall of the adapter portion. An insulating member is provided between the battery cell and the cover plate, and the insulating member has a second wedge that fits with the gap and is inserted into the gap.

17. The battery according to claim 14, characterized in that: The top surface of the pole post is provided with at least one threaded hole.

18. The battery according to claim 14, characterized in that: The battery body is provided with at least one first tab and at least one second tab, and the first tab and the second tab are provided on both end faces of the battery body; or, at least one of the two sides of the battery body is provided with the first tab and the second tab.

19. The battery according to claim 14, characterized in that: The battery body has a length L, a width H, and a thickness D. The length L of the battery body is greater than the width H, and the width H of the battery body is greater than the thickness D; and satisfies: L / H < 4, L / D < 50.

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