Battery cover plate assembly, battery shell and battery

Abstract

The utility model discloses a battery cover plate assembly, a battery shell and a battery. The battery cover plate assembly comprises a cover plate body. The cover plate body is a metal piece, the cover plate body is provided with a thinned area and a non-thinned area, the thickness of the thinned area is smaller than that of the non-thinned area, the non-thinned area comprises a first non-thinned area, and the first non-thinned area surrounds the peripheral side of the thinned area and is suitable for being connected with a shell of the battery shell. According to the battery cover plate assembly disclosed by the embodiment of the utility model, the thinning area is arranged and the thickness of the thinning area is smaller than that of the non-thinning area, so that the overall weight of the cover plate body can be reduced, and the light weight of the battery cover plate assembly is facilitated; therefore, the capacity ratio of unit weight of the battery can be improved, and the loading capacity of the battery under the same weight can be improved; moreover, the first non-thinned area surrounds the peripheral side of the thinned area and is suitable for being connected with the shell of the battery shell, and the thickness of the first non-thinned area is relatively large, so that the connection strength of the cover plate body and the shell can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover assembly, a battery shell and a battery. Background Art

[0002] In the related art, the battery case usually includes a shell and a cover plate covering the open side of the shell. In order to ensure the connection strength between the cover plate and the shell, it is usually necessary to ensure that the thickness of the cover plate is set larger. For example, when the cover plate and the shell are welded, in order to ensure the welding depth and thus the welding strength, the thickness of the cover plate is usually set larger. However, the overall thickness of the cover plate is relatively large, which will lead to a larger weight of the cover plate, affecting the capacity ratio of the battery per unit weight, and affecting the capacity of the battery loaded on the vehicle at the same weight. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a battery cover assembly, which can reduce the weight of the cover body as a whole by setting a thinning area and making the thickness of the thinning area smaller than the thickness of the non-thinning area, which is beneficial to the lightweight of the battery cover assembly, thereby facilitating the improvement of the battery capacity ratio per unit weight and the improvement of the battery loading capacity under the same weight; and, by making the first non-thinning area surround the outer peripheral side of the thinning area and suitable for connection with the shell of the battery shell, the connection strength between the cover body and the shell can be guaranteed due to the large thickness of the first non-thinning area.

[0004] The utility model provides a battery shell with the battery cover assembly.

[0005] The utility model also provides a battery with the battery shell.

[0006] According to the first aspect of the present invention, the battery cover assembly includes: a cover body, which is a metal part, and the cover body has a thinning area and a non-thinning area, the thickness of the thinning area is less than the thickness of the non-thinning area, and the non-thinning area includes a first non-thinning area, which surrounds the outer peripheral side of the thinning area and is suitable for connection with the shell of the battery shell.

[0007] According to the battery cover assembly of the embodiment of the utility model, by setting a thinning area and making the thickness of the thinning area smaller than the thickness of the non-thinning area, the overall weight of the cover body can be reduced, which is beneficial to the lightweight of the battery cover assembly, thereby facilitating the improvement of the capacity ratio of the battery unit weight and the improvement of the battery loading capacity at the same weight; and, by making the first non-thinning area surround the outer peripheral side of the thinning area and suitable for connection with the shell of the battery shell, since the thickness of the first non-thinning area is relatively large, the connection strength between the cover body and the shell can be guaranteed.

[0008] According to some embodiments of the present invention, the thickness of the thinned area ranges from 0.3 mm to 1.0 mm; and / or the thickness of the non-thinned area ranges from 1.8 mm to 3.0 mm.

[0009] According to some embodiments of the present invention, a groove is formed on the cover plate body, and a region of the cover plate body where the groove is formed constitutes the thinning region.

[0010] According to some embodiments of the present invention, the groove is formed on the inner side of the cover body.

[0011] According to some embodiments of the present invention, the area of ​​the thinned region is greater than the area of ​​the non-thinned region.

[0012] According to some embodiments of the present invention, the first non-thinning area is annular and is located at the outer periphery of the cover plate body.

[0013] According to some embodiments of the utility model, a first mounting hole and two second mounting holes arranged at intervals in a first direction are formed on the cover plate body, the first mounting hole is located between the two second mounting holes in the first direction, the first mounting hole is used to install an explosion-proof valve, and the second mounting hole is used to install a pole; the non-thinning area includes a second non-thinning area, the second non-thinning area is located between the first mounting hole and the second mounting hole, the second non-thinning area is in the shape of a long rib and extends along the second direction, and the second direction intersects with the first direction.

[0014] According to some embodiments of the present invention, the battery cover assembly includes a lower insulating member, which is located on the inner side of the cover body and connected to the non-thinning area.

[0015] According to the second aspect of the present invention, the battery shell includes: a shell, one side of which is open; the battery cover assembly according to the first aspect of the present invention is covered on the open end of the shell, and the first non-thinning area is welded to the shell.

[0016] According to the battery shell of the embodiment of the utility model, by setting the above-mentioned battery cover assembly, since the battery cover assembly is provided with a partial thinning area, the weight of the battery cover assembly can be reduced, which is beneficial to the lightweight of the battery shell, thereby facilitating the improvement of the capacity ratio of the battery unit weight and the improvement of the battery loading capacity under the same weight; and, by making the first non-thinning area surround the outer peripheral side of the thinning area and be welded to the shell of the battery shell, since the thickness of the first non-thinning area is relatively large, the connection strength between the cover body and the shell can be guaranteed, thereby ensuring the overall structural strength of the battery shell.

[0017] A battery according to an embodiment of the third aspect of the utility model comprises: a battery shell according to the embodiment of the second aspect of the utility model; and a pole group disposed in the battery shell.

[0018] According to the battery of the embodiment of the utility model, by providing the above-mentioned battery shell, the battery shell includes a battery cover assembly and the battery cover assembly is provided with a partial thinning area, so that the weight of the battery cover assembly can be reduced, which is beneficial to the lightweight of the battery shell, thereby facilitating the improvement of the capacity ratio of the battery unit weight and the improvement of the battery loading capacity under the same weight; and, by making the first non-thinning area surround the outer peripheral side of the thinning area and be welded to the shell of the battery shell, since the thickness of the first non-thinning area is relatively large, the connection strength between the cover body and the shell can be guaranteed, thereby ensuring the overall structural strength of the battery shell, and further ensuring the overall structural strength of the battery.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a front view of a battery according to some embodiments of the utility model;

[0022] Figure 2 yes Figure 1 The cross-sectional view of line AA in the figure;

[0023] Figure 3 yes Figure 2 The cross-sectional view of line BB in FIG.

[0024] Figure 4 yes Figure 3 The enlarged view of point C in FIG.

[0025] Figure 5 yes Figure 1 Exploded view of the battery cover assembly.

[0026] Reference numerals:

[0027] 1000. Battery;

[0028] 100. Battery cover assembly;

[0029] 1. Cover plate body; 11. Thinning area; 12. Non-thinning area; 121. First non-thinning area; 122. Second non-thinning area; 13. Groove; 14. First mounting hole; 15. Second mounting hole;

[0030] 21. Explosion-proof valve; 22. Pole; 23. Lower insulation; 24. Explosion-proof valve patch; 25. Sealing ring;

[0031] 3. Battery shell; 31. Shell;

[0032] 4. Pole group. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The battery cover assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] Reference Figure 5 According to the battery cover assembly 100 of the first embodiment of the utility model, the cover body 1 includes a cover body 1. The cover body 1 is a metal part, and the cover body 1 has a thinning area 11 and a non-thinning area 12. The thickness of the thinning area 11 is less than the thickness of the non-thinning area 12. The non-thinning area 12 includes a first non-thinning area 121, which surrounds the outer peripheral side of the thinning area 11 and is suitable for connecting with the shell 31 of the battery shell 3. By making the thickness of the thinning area 11 less than the thickness of the non-thinning area 12, the overall weight of the cover body 1 can be reduced, which is beneficial to the lightweight of the battery cover assembly 100, thereby facilitating the improvement of the capacity ratio of the unit weight of the battery 1000 and the improvement of the loading capacity of the battery 1000 under the same weight; and by making the first non-thinning area 121 surround the outer peripheral side of the thinning area 11 and suitable for connecting with the shell 31 of the battery shell 3, the connection strength between the cover body 1 and the shell 31 can be ensured due to the large thickness of the first non-thinning area 121.

[0036] According to the battery cover assembly 100 of the embodiment of the utility model, by providing a thinning area 11 and making the thickness of the thinning area 11 smaller than the thickness of the non-thinning area 12, the overall weight of the cover body 1 can be reduced, which is beneficial to the lightweight of the battery cover assembly 100, thereby facilitating the improvement of the capacity ratio per unit weight of the battery 1000 and the improvement of the loading capacity of the battery 1000 at the same weight; and, by making the first non-thinning area 121 surround the outer peripheral side of the thinning area 11 and suitable for connection with the shell 31 of the battery shell 3, since the thickness of the first non-thinning area 121 is relatively large, the connection strength between the cover body 1 and the shell 31 can be guaranteed.

[0037] Reference Figure 3 and Figure 5According to some embodiments of the present utility model, the thickness of the thinning zone 11 ranges from 0.3mm to 1.0mm. For example, the thickness of the thinning zone 11 may be 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, etc. By having a thickness of the thinning zone 11 of not less than 0.3mm, it is possible to ensure that the strength of the thinning zone 11 of the cover plate body 1 is sufficient; by having a thickness of the thinning zone 11 of not more than 1.0mm, it is possible to effectively reduce the overall weight of the cover plate body 1, which is beneficial to the lightweighting of the cover plate body 1. By having a thickness of the thinning zone 11 of 0.3mm to 1.0mm, it is possible to ensure that the strength of the thinning zone 11 of the cover plate body 1 is sufficient and the overall weight of the cover plate body 1 can be effectively reduced, which is beneficial to the lightweighting of the cover plate body 1.

[0038] Reference Figure 3 and Figure 5 According to some embodiments of the present utility model, the thickness of the non-thinning area 12 ranges from 1.8 mm to 3.0 mm. For example, the thickness of the non-thinning area 12 may be 1.8 mm, 1.9 mm, 2.0 mm, 2.5 mm, 3.0 mm, etc. By ensuring that the thickness of the non-thinning area 12 is not less than 1.8 mm, it is possible to ensure that the strength of the cover body 1 in the non-thinning area 12 is sufficient, and the non-thinning area 12 is suitable for connection with the shell 31 of the battery shell 3. By ensuring that the thickness of the non-thinning area 12 is not less than 1.8 mm, the connection strength between the cover body 1 and the shell 31 can be ensured; by ensuring that the thickness of the non-thinning area 12 is not greater than 3.0 mm, the weight of the non-thinning area 12 is prevented from being too large, and the cover body 1 is prevented from being too heavy. By having the thickness range of the non-thinning area 12 be 1.8 mm to 3.0 mm, it can be ensured that the strength of the cover body 1 in the non-thinning area 12 is sufficient, and since the non-thinning area 12 is suitable for connection with the shell 31 of the battery shell 3, the connection strength between the cover body 1 and the shell 31 can be ensured and the weight of the non-thinning area 12 can be avoided to be excessive, thereby avoiding the cover body 1 from being too heavy.

[0039] Reference Figure 3 and Figure 5 According to some embodiments of the present invention, the thickness of the thinned area 11 ranges from 0.3 mm to 1.0 mm and the thickness of the non-thinned area 12 ranges from 1.8 mm to 3.0 mm. For example, the thickness of the thinned area 11 can be 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1.0 mm, etc., and the thickness of the non-thinned area 12 can be 1.8 mm, 1.9 mm, 2.0 mm, 2.5 mm, 3.0 mm, etc.

[0040] By ensuring that the thickness of the thinning area 11 is not less than 0.3 mm and the thickness of the non-thinning area 12 is not less than 1.8 mm, it can be ensured that the strength of the thinning area 11 of the cover body 1 is sufficient, and the non-thinning area 12 is suitable for connection with the shell 31 of the battery shell 3. By ensuring that the thickness of the non-thinning area 12 is not less than 1.8 mm, the connection strength between the cover body 1 and the shell 31 can be guaranteed; by ensuring that the thickness of the thinning area 11 is not greater than 1.0 mm and the thickness of the non-thinning area 12 is not greater than 3.0 mm, the overall weight of the cover body 1 can be effectively reduced and the weight of the non-thinning area 12 can be avoided to be excessive, which is conducive to the lightweight of the cover body 1.

[0041] Reference Figure 5 According to some embodiments of the present invention, a groove 13 is formed on the cover body 1, and the area of ​​the cover body 1 where the groove 13 is formed constitutes a thinning area 11. By forming the thinning area 11 in the area of ​​the cover body 1 where the groove 13 is formed, the overall weight of the cover body 1 can be effectively reduced.

[0042] Reference Figure 5 According to some embodiments of the present invention, a groove 13 is formed on the inner side of the cover body 1, which can keep the outer side of the cover body 1 flat, and form a concave structure on the inner side of the cover body 1, so that the space inside the battery cover assembly 100 is improved.

[0043] Reference Figure 5 According to some embodiments of the present invention, the area of ​​the thinned region 11 is larger than the area of ​​the non-thinned region 12 , which can effectively reduce the overall weight of the cover body 1 and achieve a lightweight design of the battery cover assembly 100 .

[0044] Reference Figure 5 According to some embodiments of the utility model, the first non-thinning area 121 is annular and located at the outer periphery of the cover body 1, which can enhance the structural strength of the outer periphery of the cover body 1, thereby ensuring that the overall structural strength of the cover body 1 is sufficient; and, by making the first non-thinning area 121 located at the outer periphery of the cover body 1 and suitable for connecting with the shell 31 of the battery shell 3, since the thickness of the first non-thinning area 121 is relatively large, the connection strength between the cover body 1 and the shell 31 can be guaranteed.

[0045] Reference Figure 5 According to some embodiments of the present invention, the cover body 1 is formed with a first direction (for example, referring to Figure 1-Figure 5The first mounting hole 14 and the two second mounting holes 15 are arranged at intervals (in the e1 direction in the figure), and the first mounting hole 14 is located between the two second mounting holes 15 in the first direction. The first mounting hole 14 is used to install the explosion-proof valve 21, and the second mounting hole 15 is used to install the pole 22. The first mounting hole 14 can play a role in installing and fixing the assembly of the explosion-proof valve 21, and the second mounting hole 15 can play a role in installing and fixing the assembly of the pole 22.

[0046] For example, the battery cover assembly 100 may include an explosion-proof valve patch 24, which may be disposed on the surface of the explosion-proof valve 21 to protect the explosion-proof valve 21, thereby extending the service life of the explosion-proof valve 21. By locating the explosion-proof valve 21 in the first mounting hole 14, the assembly process between the explosion-proof valve 21 and the cover body 1 may be completed.

[0047] For another example, the battery cover assembly 100 may further include a sealing ring 25 . The sealing ring 25 is disposed on the inner side of the cover body 1 and between the pole 22 and the second mounting hole 15 , and can enhance the sealing effect between the pole 22 and the second mounting hole 15 .

[0048] In addition, refer to Figure 5 The non-thinning area 12 includes a second non-thinning area 122, the second non-thinning area 122 is located between the first mounting hole 14 and the second mounting hole 15, and the second non-thinning area 122 is in the shape of a long rib and along the second direction (for example, refer to Figure 1-Figure 5 The second direction intersects with the first direction, which can enhance the structural strength of the cover body 1 along the second direction, thereby improving the overall structural strength of the cover body 1.

[0049] Reference Figure 3 and Figure 5 According to some embodiments of the present invention, the battery cover assembly 100 includes a lower insulating member 23, which is located on the inner side of the cover body 1 and connected to the non-thinning area 12. Since the thickness of the non-thinning area 12 is relatively large, the lower insulating member 23 is located on the inner side of the cover body 1 and connected to the non-thinning area 12, which can ensure the connection strength between the cover body 1 and the lower insulating member 23.

[0050] Reference Figure 1 , Figure 2 and Figure 4 The battery case 3 according to the second embodiment of the utility model comprises a shell 31 and a battery cover assembly 100 according to the first embodiment of the utility model. One side of the shell 31 is open, the battery cover assembly 100 is covered on the open end of the shell 31, and the first non-thinning area 121 is welded to the shell 31.

[0051] According to the battery shell 3 of the embodiment of the utility model, by setting the above-mentioned battery cover assembly 100, since the battery cover assembly 100 is provided with a partial thinning area 11, the weight of the battery cover assembly 100 can be reduced, which is beneficial to the lightweight of the battery shell 3, thereby facilitating the improvement of the capacity ratio of the battery 1000 per unit weight and the improvement of the loading capacity of the battery 1000 under the same weight; and, by making the first non-thinning area 121 surround the outer peripheral side of the thinning area 11 and be welded to the shell 31 of the battery shell 3, since the thickness of the first non-thinning area 121 is relatively large, the connection strength between the cover body 1 and the shell 31 can be guaranteed, thereby ensuring the overall structural strength of the battery shell 3.

[0052] The battery 1000 according to the third aspect of the present invention comprises the battery shell 3 and the electrode group 4 according to the second aspect of the present invention. The electrode group 4 is disposed in the battery shell 3.

[0053] According to the battery 1000 of the embodiment of the utility model, by providing the above-mentioned battery shell 3, the battery shell 3 includes a battery cover assembly 100 and the battery cover assembly 100 is provided with a partial thinning area 11, so that the weight of the battery cover assembly 100 can be reduced, which is beneficial to the lightweight of the battery shell 3, thereby facilitating the improvement of the capacity ratio per unit weight of the battery 1000 and the improvement of the loading capacity of the battery 1000 under the same weight; and, by making the first non-thinning area 121 surround the outer peripheral side of the thinning area 11 and be welded to the shell 31 of the battery shell 3, since the thickness of the first non-thinning area 121 is relatively large, the connection strength between the cover body 1 and the shell 31 can be guaranteed, thereby ensuring the overall structural strength of the battery shell 3, and further ensuring the overall structural strength of the battery 1000.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover assembly, characterized in that: include: The cover plate body is a metal part, and the cover plate body has a thinning area and a non-thinning area. The thickness of the thinning area is less than the thickness of the non-thinning area. The non-thinning area includes a first non-thinning area, which surrounds the outer peripheral side of the thinning area and is suitable for connection with the shell of the battery shell.

2. The battery cover assembly according to claim 1, characterized in that: The thickness of the thinned area ranges from 0.3 mm to 1.0 mm; and / or the thickness of the non-thinned area ranges from 1.8 mm to 3.0 mm.

3. The battery cover assembly according to claim 1, characterized in that: A groove is formed on the cover plate body, and a region of the cover plate body where the groove is formed constitutes the thinning region.

4. The battery cover assembly according to claim 3, characterized in that: The groove is formed on the inner side of the cover body.

5. The battery cover assembly according to claim 1, characterized in that: The area of ​​the thinned region is greater than the area of ​​the non-thinned region.

6. The battery cover assembly according to claim 5, characterized in that: The first non-thinning area is annular and is located at the outer periphery of the cover plate body.

7. The battery cover assembly according to claim 6, characterized in that: The cover body is formed with a first mounting hole and two second mounting holes arranged at intervals in a first direction, the first mounting hole is located between the two second mounting holes in the first direction, the first mounting hole is used to install the explosion-proof valve, and the second mounting hole is used to install the pole; The non-thinning area includes a second non-thinning area, the second non-thinning area is located between the first mounting hole and the second mounting hole, the second non-thinning area is in the shape of a long rib and extends along a second direction, and the second direction intersects with the first direction.

8. The battery cover assembly according to any one of claims 1 to 7, characterized in that: A lower insulating member is included, and the lower insulating member is located on the inner side of the cover plate body and connected to the non-thinning area.

9. A battery case, characterized in that: include: a housing, one side of which is open; The battery cover assembly according to any one of claims 1 to 8 is covered on the open end of the shell, and the first non-thinned area is welded to the shell.

10. A battery, characterized in that: include: The battery case according to claim 9; The electrode group is arranged in the battery shell.

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