Battery cover plate, battery and battery pack
By designing anti-rotation pillars and anti-rotation holes on the battery cover, the problem of rotation of the plastic and terminals under charging expansion and vibration was solved, thereby improving the torsional resistance and structural strength of the battery cover.
Patent Information
- Application Number
- CN202423134968.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-07-30
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-18
AI Technical Summary
During charging, the expansion and vibration of the battery can cause the plastic casing and terminals to rotate, leading to battery safety issues.
Design a battery cover plate with an anti-rotation post and anti-rotation hole structure. The anti-rotation post is inserted into the anti-rotation hole and satisfies the ratio of 2≤d/h≤20 to ensure that the anti-rotation post has sufficient strength and torsional resistance. At the same time, control the overall size of the insulating parts to avoid affecting the quality and layout of the battery cover plate.
It effectively prevents the insulating components from rotating inside the battery, improves the torsional resistance of the battery cover, avoids an increase in overall weight, and ensures the structural strength and rational layout of the battery cover.
Smart Images
Figure CN223665556U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field, concretely relates to battery cover plate, battery and battery package. BACKGROUND
[0002] The battery cover plate usually includes an aluminum plate, a pole and a riveting block, the riveting block is riveted and fixed with the pole, and the upper plastic is used for insulation between the aluminum plate and the riveting block and plays a fixing role on the riveting block. The battery will expand during the charging process to generate an expansion force, and a pushing and twisting force will be generated between the batteries due to vibration and bumping during the vehicle operation. Under the action of the expansion force and the pushing and twisting force, the upper plastic and the pole are prone to rotating during use, which may cause safety problems of the battery. SUMMARY
[0003] Therefore, the utility model provides a battery cover plate, battery and battery package to solve the problem that the upper plastic and the pole are prone to rotating during use and causing safety problems of the battery in the prior art.
[0004] In a first aspect, the utility model provides a battery cover plate, which comprises: a cover plate body; a pole penetrating through the cover plate body; an insulating piece corresponding to the outer surface of the cover plate body, the insulating piece being formed with a penetrating hole, the pole being inserted into the penetrating hole, one side of the insulating piece facing the cover plate body being protruded to form a rotation-stopping column, the outer surface of the cover plate body being provided with a rotation-stopping hole, and the rotation-stopping column being inserted into the rotation-stopping hole; the maximum width of the rotation-stopping column on the xy plane is d, the height of the rotation-stopping column in the z direction is h, and 2≤d / h≤20 is satisfied.
[0005] Beneficial effect: while ensuring that the rotation-stopping column has sufficient strength to meet the anti-twisting performance, the overall size of the insulating piece is prevented from being too large to affect the overall quality and layout of the battery cover plate.
[0006] In an optional embodiment, the rotation-stopping column is in a cylindrical shape, the rotation-stopping hole is in a cylindrical hole body, the diameter of the rotation-stopping column is d, the diameter of the rotation-stopping hole is D, 3mm≤d≤8mm, 3.1mm≤D≤9mm, and d<D are satisfied.
[0007] Beneficial effect: while ensuring the anti-twisting performance of the insulating piece, the overall size of the insulating piece is prevented from being too large to affect the overall quality and layout of the battery cover plate.
[0008] In an optional embodiment, the fitting gap between the rotation-stopping column and the rotation-stopping hole satisfies 0.05mm≤(D-d) / 2≤0.5mm.
[0009] Beneficial effect: while facilitating the mutual cooperation of the rotation-stopping column and the rotation-stopping hole, the position accuracy of the insulating piece is ensured.
[0010] In an optional embodiment, the height of the rotation-stopping hole in the z direction is H, satisfying 0.4mm≤h≤1.5mm, 0.45mm≤H≤2mm, and h<H.
[0011] Beneficial effect: while ensuring the anti-torsion performance of the insulating piece, the thickness of the cover plate body is prevented from being too thick, so that the overall weight of the battery cover plate is prevented from being too large.
[0012] In an optional embodiment, the height difference between the rotation-stopping hole and the rotation-stopping column satisfies 0.05mm≤(H-h)≤0.5mm.
[0013] Beneficial effect: while ensuring that the rotation-stopping column is completely inserted into the rotation-stopping hole to achieve cooperation, the rotation-stopping column has a larger height, and the anti-torsion performance of the insulating piece is improved.
[0014] In an optional embodiment, the height of the rotation-stopping hole in the z direction is H, and the thickness of the cover plate body in the z direction is T, satisfying 0.2≤H / T≤0.8 and (T-H)≥0.5mm.
[0015] Beneficial effect: while ensuring the anti-torsion performance of the insulating piece, the structural strength of the battery cover plate is ensured.
[0016] In an optional embodiment, in the xy plane, the minimum distance between the edge of the rotation-stopping column and the first side edge of the insulating piece is a, the minimum distance between the edge of the rotation-stopping column and the second side edge of the insulating piece is b, and the first side edge and the second side edge are adjacently arranged, satisfying 1.5mm≤a≤15mm and 1.5mm≤b≤15mm.
[0017] Beneficial effect: while improving the anti-torsion performance of the insulating piece, the processing quality of the insulating piece is ensured.
[0018] In an optional embodiment, in the xy plane, the minimum distance between the edge of the rotation-stopping column and the edge of the through hole is c, satisfying 2mm≤c≤20mm; and / or,
[0019] The maximum torsion of the battery cover plate is greater than 12N.
[0020] Beneficial effect: while improving the anti-torsion performance of the insulating piece, the overall size of the insulating piece is prevented from being too large to affect the overall quality and layout of the battery cover plate.
[0021] In a second aspect, the utility model also provides a battery, including above-mentioned battery cover plate.
[0022] In a third aspect, the utility model also provides a battery pack, including above-mentioned battery. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0024] Figure 1 It is an exploded structural schematic view of the battery cover plate of the embodiment of the present application.
[0025] Figure 2 It is a top view of the battery cover plate of the embodiment of the present application.
[0026] Figure 3 It is a sectional view along direction A-A. Figure 2
[0027] Figure 4 It is a partial enlarged schematic view of B. Figure 3
[0028] It is a whole structural schematic view of the insulating piece of the embodiment of the present application. Figure 5
[0029] It is a whole structural schematic view of the cover plate body of the embodiment of the present application. Figure 6
[0030] Figure 7 It is a bottom view of the insulating piece shown in the figure. Figure 5
[0031] It is a top view of the cover plate body shown in the figure. Figure 8 Figure 6 It is a top view of another battery cover plate of the embodiment of the present application.
[0032] Figure 9 It is a sectional view along direction C-C.
[0033] Figure 10 Figure 9
[0034] BRIEF DESCRIPTION OF DRAWINGS
[0035] 1, cover plate body; 11, rotation stopping hole; 2, pole column; 3, insulating piece; 31, through hole; 32, rotation stopping column; 33, first side edge; 34, second side edge; 4, riveting block. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0037] The embodiments of the utility model will be described below in combination with Figures 1 to 10 .
[0038] According to the embodiments of the utility model, on the one hand, a battery cover plate is provided, which comprises a cover plate body 1, a pole 2 and an insulating part 3. The pole 2 is arranged through the cover plate body 1, and the insulating part 3 is arranged corresponding to the outer surface of the cover plate body 1. The insulating part 3 is formed with a through hole 31, and the pole 2 is inserted into the through hole 31. One side of the insulating part 3 towards the cover plate body 1 is formed with a rotation-stopping column 32, and the outer surface of the cover plate body 1 is provided with a rotation-stopping hole 11, and the rotation-stopping column 32 is inserted into the rotation-stopping hole 11. Figure 4 and Figure 7 As shown, the maximum width of the rotation-stopping column in the xy plane is d, and the height of the rotation-stopping column 32 in the z direction is h, and 2≤d / h≤20 is satisfied. While ensuring that the rotation-stopping column 32 has sufficient strength to meet the anti-torsion performance, the overall size of the insulating part 3 is avoided to be too large to affect the overall quality and layout of the battery cover plate.
[0039] It is worth noting that if the value of d / h is too small, the shape of the rotation-stopping column 32 is too long, and the battery is easy to break the rotation-stopping column 32 when stressed, thereby causing the anti-torsion performance to fail. If the value of d / h is too large, the size of the rotation-stopping column 32 occupies the insulating part 3, which is not easy to arrange the rotation-stopping column 32 under the limited space of the insulating part 3. If the size of the insulating part 3 is increased, the weight of the battery cover plate will be increased, which is not conducive to the weight reduction, cost reduction and energy consumption performance of the battery, and is not conducive to the arrangement of the remaining components (such as explosion-proof valve) on the cover plate body 1.
[0040] It should be noted that in the present embodiment, the rotation-stopping column 32 is in the shape of a cylinder, and accordingly, the diameter of the rotation-stopping column 32 is d.
[0041] It needs to be further explained that if the value of h is certain, the value of d is too small, which leads to too small diameter of the rotation-stopping column 32, lower structural strength of the rotation-stopping column 32 and weaker anti-torsion performance; if the value of h is certain, the value of d leads to too large diameter of the rotation-stopping column 32, which is not easy to arrange the rotation-stopping column 32 under the limited space of the insulating part 3, if the size of the insulating part 3 is increased, it will lead to the weight of the battery cover plate increasing, which is not conducive to the performance of battery weight reduction, cost reduction and energy consumption, and is not conducive to the arrangement of the remaining components (such as explosion-proof valve, etc.) on the cover plate body 1, at the same time, the diameter of the rotation-stopping hole 11 opened on the cover plate body 1 needs to be increased synchronously, which leads to the weakening of the structural strength of the cover plate body 1.
[0042] If the value of d is certain, the value of h is too small, the height of the rotation-stopping column 32 is too small, and the anti-torsion performance is insufficient; if the value of d is certain, the value of h is too large, the height of the rotation-stopping column 32 is too large, and the shrinkage hole and shrinkage of the insulating part 3 during injection molding are prone to occur, which leads to the weakening of the anti-torsion performance, at the same time, the height of the rotation-stopping hole 11 on the cover plate body 1 needs to be increased synchronously, which leads to the local thinning of the cover plate body 1, affecting the structural strength of the cover plate body 1, if the structural strength of the cover plate body 1 needs to be ensured, the thickness of the cover plate body 1 needs to be increased, which leads to the weight of the battery cover plate increasing, which is not conducive to the performance of battery weight reduction, cost reduction and energy consumption.
[0043] It is worth mentioning that the x direction, the y direction and the z direction are perpendicular to each other.
[0044] In one embodiment, as shown in Figures 4 to 8 the rotation-stopping column 32 is in a cylindrical shape, the rotation-stopping hole 11 is in a cylindrical hole body, the diameter of the rotation-stopping column 32 is d, the diameter of the rotation-stopping hole 11 is D, which satisfies 3mm≤d≤8mm, 3.1mm≤D≤9mm, d<D. While ensuring the anti-torsion performance of the insulating part 3, the overall size of the insulating part 3 is prevented from being too large to affect the overall quality and layout of the battery cover plate.
[0045] Specifically, if the values of d and D are too small, the diameter of the rotation-stopping column 32 is too small, the structural strength of the rotation-stopping column 32 is low, and the anti-torsion performance is weak; if the values of d and D are too large, the diameter of the rotation-stopping column 32 is too large, which is not easy to arrange the rotation-stopping column 32 under the limited space of the insulating part 3, if the size of the insulating part 3 is increased, it will lead to the weight of the battery cover plate increasing, which is not conducive to the performance of battery weight reduction, cost reduction and energy consumption, and is not conducive to the arrangement of the remaining components (such as explosion-proof valve, etc.) on the cover plate body 1, at the same time, the diameter of the rotation-stopping hole 11 opened on the cover plate body 1 is too large, which leads to the weakening of the structural strength of the cover plate body 1. And the diameter of the rotation-stopping column 32 is less than the diameter of the rotation-stopping hole 11, which ensures that the rotation-stopping column 32 and the rotation-stopping hole 11 can be smoothly inserted and matched.
[0046] In one embodiment, the fitting clearance between the anti-rotation post 32 and the anti-rotation hole 11 satisfies 0.05mm ≤ (Dd) / 2 ≤ 0.5mm. This facilitates the mutual fitting of the anti-rotation post 32 and the anti-rotation hole 11 while ensuring the positional accuracy of the insulating component 3. Specifically, if the fitting clearance between the anti-rotation post 32 and the anti-rotation hole 11 is too small, it will lead to difficulties in assembling the insulating component 3 and the cover plate body 1; if the fitting clearance between the anti-rotation post 32 and the anti-rotation hole 11 is too large, it will cause the fitting position of the insulating component 3 and the cover plate body 1 to shift, affecting the assembly effect of the battery.
[0047] In one embodiment, such as Figure 4 As shown, the height of the anti-rotation post 32 in the z-direction is h, and the height of the anti-rotation hole 11 in the z-direction is H, satisfying 0.4mm≤h≤1.5mm, 0.45mm≤H≤2mm, and h<H. This ensures the torsional resistance of the insulating component 3 while avoiding excessive thickness of the cover plate body 1, which would lead to an excessively heavy overall battery cover. Specifically, if the values of h and H are too small, the height of the anti-rotation post 32 will be too small, resulting in low structural strength and weak torsional resistance. If the values of h and H are too large, the height of the anti-rotation post 32 will be too large, making the insulating component 3 prone to shrinkage during injection molding, thus weakening the torsional resistance. Simultaneously, the height of the anti-rotation hole 11 on the cover plate body 1 needs to be increased accordingly, leading to localized thinning of the cover plate body 1 and affecting its structural strength. To ensure the structural strength of the cover plate body 1, its thickness needs to be increased, resulting in increased weight of the battery cover, which is detrimental to battery weight reduction, cost reduction, and energy efficiency.
[0048] In one embodiment, the height difference between the anti-rotation hole 11 and the anti-rotation post 32 satisfies 0.05mm ≤ (Hh) ≤ 0.5mm. This ensures that the anti-rotation post 32 is fully inserted into the anti-rotation hole 11 for proper engagement, while also providing a greater height to improve the torsional resistance of the insulating component 3. Specifically, if the height difference between the anti-rotation hole 11 and the anti-rotation post 32 is too small, the anti-rotation post 32 may not be fully inserted, affecting the assembly effect between the insulating component 3 and the cover plate body 1. If the height difference is too large, the anti-rotation post 32 may be insufficiently tall, weakening the torsional resistance. Alternatively, an excessively large height of the anti-rotation hole 11 may result in the cover plate body 1 being locally too thin, affecting its structural strength. To ensure the structural strength of the cover plate body 1, its thickness needs to be increased, leading to increased battery cover weight, which is detrimental to battery weight reduction, cost reduction, and energy efficiency.
[0049] In one embodiment, such as Figure 4As shown, the height of the anti-rotation hole 11 in the z-direction is H, and the thickness of the cover plate body 1 in the z-direction is T, satisfying 0.2≤H / T≤0.8, (TH)≥0.5mm. This ensures both the torsional resistance of the insulating component 3 and the structural strength of the battery cover. Specifically, if the value of H / T is too small, the height of the anti-rotation hole 11 will be too small, resulting in a correspondingly small height of the anti-rotation column 32 and weakened torsional resistance. If the value of H / T is too large, the height of the anti-rotation hole 11 will be too large, causing the remaining portion of the cover plate body 1 at the position corresponding to the anti-rotation hole 11 to be too thin, resulting in insufficient structural strength of the cover plate body 1. Simultaneously, ensuring (TH)≥0.5mm, that is, ensuring that the remaining portion of the cover plate body 1 at the position corresponding to the anti-rotation hole 11 has sufficient thickness, further guarantees the structural strength of the cover plate body 1.
[0050] In one embodiment, such as Figure 7 As shown, on the xy plane, the minimum distance between the edge of the anti-rotation post 32 and the first side 33 of the insulating member 3 is a, and the minimum distance between the edge of the anti-rotation post 32 and the second side 34 of the insulating member 3 is b. The first side 33 and the second side 34 are arranged adjacent to each other, satisfying 1.5mm≤a≤15mm and 1.5mm≤b≤15mm.
[0051] The battery cover plate of this embodiment improves the torsional resistance of the insulating component 3 while ensuring the processing quality of the insulating component 3. Specifically, if the values of a and b are too small, the position of the anti-rotation post 32 is too close to the edge of the insulating component 3, which can easily lead to local injection molding shrinkage deformation of the injection-molded insulating component 3; if the values of a and b are too large, the anti-rotation hole 11 is too close to the center of the pole post 2, which affects the torsional resistance of the insulating component 3.
[0052] In one embodiment, such as Figure 7 As shown, in the xy plane, the minimum distance between the edge of the anti-rotation post 32 and the edge of the through hole 31 is c, satisfying 2mm≤c≤20mm. This improves the torsional resistance of the insulating component 3 while avoiding excessively large overall dimensions that could affect the overall quality and layout of the battery cover. Specifically, if c is too small, the anti-rotation hole 11 will be too close to the center of the pole post 2, affecting the torsional resistance of the insulating component 3; if c is too large, the overall size of the insulating component 3 needs to be increased, leading to increased weight of the battery cover, which is detrimental to battery weight reduction, cost reduction, and energy efficiency, and also hinders the arrangement of other components on the cover body 1.
[0053] It should be noted that you should refer to [link / reference]. Figure 5, in this embodiment, the anti-rotation column 32 is cylindrical. It can be understood that in other alternative embodiments, the anti-rotation column 32 can also have other shapes and structures, such as a cuboid shape, a polygonal prism shape, an elliptical cylinder shape, etc. It can be understood that when the anti-rotation column is in the shape of a cuboid, the projection of the anti-rotation column in the height direction is square, and the maximum width of this projection is the diagonal dimension.
[0054] In one embodiment, as Figures 3 to 8 shown, a plurality of anti-rotation columns 32 are provided, and correspondingly, a plurality of anti-rotation holes 11 are provided. The plurality of anti-rotation columns 32 are arranged corresponding to the plurality of anti-rotation holes 11 specifically. As Figure 7 shown, in this embodiment, two anti-rotation columns 32 are provided, and the two anti-rotation columns 32 penetrate through the outer periphery of the through hole 31 and are arranged at an interval of 180°.
[0055] 0Of course, in other alternative embodiments, the number and position of the anti-rotation columns 32 can be specifically set according to actual needs. <000014>
[0056] In one embodiment, as Figures 1 to 4 shown, the battery cover plate further includes a riveting block 4, and the riveting block 4 is riveted to the outer periphery of the pole column 2, and the insulating member 3 is located between the riveting block 4 and the cover plate body 1.
[0057] The following conducts a torque test on battery cover plates with different dimensional parameters. Specifically, a torque wrench is used to apply torque to the battery cover plate, and its ultimate maximum torque value is measured. A torque value greater than 12 N is considered qualified, otherwise it is unqualified. The test results of the examples and comparative examples are shown in Tables 1 and 2. It should be noted that the examples are battery cover plates with dimensional parameters that meet the requirements of this embodiment, and correspondingly, the comparative examples are battery cover plates with dimensional parameters that do not meet the requirements of this embodiment.
[0058] Table 1 Torque test results of the battery cover plate in the examples
[0059]
[0060] Table 2 Torque test results of the battery cover plate in the comparative examples
[0061]
[0062] As can be seen from Table 1, in Examples 1 to 8, all parameters of the battery cover plate are within the range required by this embodiment. After the torque test, there is no cracking phenomenon in the battery cover plate, and the maximum torque of the battery cover plate is greater than 12 N, meeting the requirements.
[0063] As can be seen from Table 2, in the comparative example 1 and the comparative example 2, the value of h is greater than 1.5 mm, which is higher than the range required in the embodiment, and the value of d / h is less than 2, which is lower than the range required in the embodiment. The torsion value of the battery cover plate of the comparative example 1 and the comparative example 2 in the battery cover plate torsion test is less than 12 N, and the torsion value is low, which does not meet the requirements.
[0064] As can be seen from Table 2, in the comparative example 3 and the comparative example 4, the value of d is greater than 8 mm, which is higher than the range required in the embodiment, the value of D is greater than 9 mm, which is higher than the range required in the embodiment, and the value of d / h is greater than 20, which is higher than the range required in the embodiment. The torsion value of the battery cover plate of the comparative example 3 and the comparative example 4 in the battery cover plate torsion test is greater than 12 N, which meets the requirements, but the edge of the battery cover plate cracks, which does not meet the requirements.
[0065] As can be seen from Table 2, in the comparative example 5, the value of (D-d) / 2 is less than 0.05 mm, even less than 0, which is lower than the range required in the embodiment. In the assembly process of the battery cover plate of the comparative example 5, the insulating part 3 and the cover plate body 1 cannot be assembled.
[0066] As can be seen from Table 2, in the comparative example 6, the value of H-h is less than 0.05 mm, even less than 0, which is lower than the range required in the embodiment. In the assembly process of the battery cover plate of the comparative example 6, the stopper column 32 cannot be completely inserted into the stopper hole 11, resulting in that the assembly cannot be completed.
[0067] As can be seen from Table 2, in the comparative example 7 and the comparative example 8, the value of d / h is greater than 20, which is higher than the range required in the embodiment, and the value of h is less than 0.4 mm, which is lower than the range required in the embodiment. The torsion value of the battery cover plate of the comparative example 7 and the comparative example 8 in the battery cover plate torsion test is less than 12 N, and the torsion value is low, which does not meet the requirements.
[0068] According to the embodiment of the utility model, on the other hand, a battery is also provided, including the above-mentioned battery cover plate.
[0069] According to the embodiment of the utility model, on the other hand, a battery pack is also provided, including the above-mentioned battery.
[0070] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A battery cover plate, characterized by, The battery cover plate comprises: a cover plate body; a pole column arranged through the cover plate body; an insulating piece arranged corresponding to the outer surface of the cover plate body, the insulating piece being formed with a through hole, the pole column being inserted into the through hole, one side of the insulating piece facing the cover plate body being protrusively formed with a rotation-stopping column, the outer surface of the cover plate body being provided with a rotation-stopping hole, the rotation-stopping column being inserted into the rotation-stopping hole; the maximum width of the rotation-stopping column on the xy plane being d, the height of the rotation-stopping column in the z direction being h, and 2≤d / h≤20 being satisfied.
2. The battery cover plate of claim 1, wherein, The rotation-stopping column is cylindrical, the rotation-stopping hole is a cylindrical hole, the diameter of the rotation-stopping column is d, and the diameter of the rotation-stopping hole is D, and 3mm≤d≤8mm, 3.1mm≤D≤9mm, and d<D are satisfied.
3. The battery cover plate of claim 2, wherein, The fitting gap of the rotation-stopping column and the rotation-stopping hole satisfies 0.05mm≤(D-d) / 2≤0.5mm.
4. The battery cover plate according to any one of claims 1 to 3, characterized in that, The height of the rotation-stopping hole in the z direction satisfies 0.4mm≤h≤1.5mm, 0.45mm≤H≤2mm, and h<H.
5. The battery cover plate of claim 4, wherein, The height difference between the rotation-stopping hole and the rotation-stopping column satisfies 0.05mm≤(H-h)≤0.5mm.
6. The battery cover plate of any one of claims 1 to 3, wherein, The height of the rotation-stopping hole in the z direction is H, and the thickness of the cover plate body in the z direction is T, and 0.2≤H / T≤0.8 and (T-H)≥0.5mm are satisfied.
7. The battery cover plate of any one of claims 1 to 3, wherein, In the xy plane, the minimum distance between the edge of the rotation-stopping column and the first side edge of the insulating piece is a, the minimum distance between the edge of the rotation-stopping column and the second side edge of the insulating piece is b, the first side edge and the second side edge are arranged adjacent to each other, and 1.5mm≤a≤15mm and 1.5mm≤b≤15mm are satisfied.
8. The battery cover plate of any one of claims 1 to 3, wherein, In the xy plane, the minimum distance between the edge of the rotation-stopping column and the edge of the through hole is c, and 2mm≤c≤20mm is satisfied; and / or, The maximum torsion of the battery cover plate is greater than 12N.
9. A battery, characterized by The battery cover plate according to any one of claims 1 to 8 is included.
10. A battery pack, characterized by, The battery according to claim 9 is included.