Battery cover plate and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses a battery cover plate and a battery, and the battery cover plate comprises a cover plate body and an anti-explosion valve. The reinforcing ribs are arranged in the mounting holes in the cover plate body, the inner walls of the mounting holes can be supported through the reinforcing ribs, and the structural strength of the positions, where the mounting holes are formed, of the cover plate body is improved. And the connecting part of the anti-explosion valve is connected with the cover plate body. A weak part and a convex rib are arranged on the valve body, and the convex rib is arranged on the inner side of the weak part. By arranging the weak part, high-temperature and high-pressure gas can break through the weak part when the pressure in the battery is relatively high, so that an exhaust channel is formed in the valve body, further pressure relief is realized, and the safety of the battery is ensured. By arranging the convex ribs, the structural strength of the anti-explosion valve can be improved, the weak part on the valve body is prevented from deforming, and it is guaranteed that the valve opening pressure of the anti-explosion valve is stable and high in reliability. The utility model further provides a battery which comprises the battery cover plate.

Description

Technical Field

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

[0002] To ensure battery safety, an explosion-proof valve is typically integrated into the battery cover. When the gas pressure inside the battery is too high, the high-pressure gas can break through the explosion-proof valve, thereby releasing pressure and ensuring the safety of the battery. During installation, a mounting hole is typically opened in the battery cover, and the explosion-proof valve is then installed within the hole. However, opening a mounting hole in the battery cover significantly reduces the structural strength of the battery cover at the mounting hole. When the battery cover is slightly deformed by external pressure, it may squeeze the explosion-proof valve, causing deformation at weak points in the valve. This can lead to unstable valve opening pressure, affecting the battery's pressure relief capability and reducing battery reliability. When the battery cover is severely deformed by external pressure, the seal between the cover and the housing may fail, rendering the battery useless.

[0003] Therefore, there is an urgent need for a battery cover and a battery to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a battery cover and a battery, wherein reinforcing ribs are provided in the mounting hole to support the mounting hole, thereby improving the structural strength of the cover body at the location where the mounting hole is opened. At the same time, convex ribs are provided on the explosion-proof valve, thereby improving the ability of the explosion-proof valve to resist deformation and stabilizing the valve opening pressure of the explosion-proof valve.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In one aspect, the present invention provides a battery cover, comprising:

[0007] A cover plate body, wherein the cover plate body is provided with a mounting hole, wherein a plurality of reinforcing ribs are provided in the mounting hole, wherein one end of the plurality of reinforcing ribs is connected to the inner wall of the mounting hole, and the other ends of the plurality of reinforcing ribs converge and connect at the center point of the mounting hole; a sink is provided on one end surface of the cover plate body, and the sink is coaxial with the mounting hole;

[0008] The explosion-proof valve includes a valve body and a connecting portion, wherein the connecting portion is located in the circumference of the valve body and abuts against the bottom wall of the sink. The valve body is provided with a weak portion and a convex rib, and the weak portion is annular and located in the circumference of the convex rib.

[0009] Optionally, the plurality of reinforcing ribs are arranged in an "X" shape or a "R" shape.

[0010] Optionally, a support rib is further provided in the mounting hole, and both ends of the support rib are respectively connected to the midpoint of one of the reinforcing ribs.

[0011] Optionally, the explosion-proof valve further includes a transition portion, the two sides of which are respectively connected to the valve body and the connecting portion, the valve body protrudes toward a side away from the cover body, and there is a gap g between the valve body and the reinforcing rib, and the value range of g is 0.05mm≤g≤0.25mm.

[0012] Optionally, the end surface of the reinforcing rib facing the explosion-proof valve is located in the same plane as the bottom wall of the sink.

[0013] Optionally, there are two convex ribs on the valve body, both of which are arc-shaped, and the two convex ribs protrude towards each other and intersect at the center point of the valve body.

[0014] Optionally, the weak portion on the valve body is a notch, the residual thickness at the notch is D1, the thickness of the valve body is D, and D1<D.

[0015] Optionally, the length direction of the explosion-proof valve is the same as the length direction of the cover body, and the width direction of the explosion-proof valve is the same as the width direction of the cover body;

[0016] The length-to-width ratio of the explosion-proof valve is k1, and the value range of k1 is 4≤k1≤5;

[0017] The aspect ratio of the cover plate body is k2, and the value range of k2 is 9≤k2≤10.

[0018] Optionally, along a direction perpendicular to the end surface of the cover body, a projection of the weak portion on the cover body falls within a projection of the mounting hole on the cover body.

[0019] On the other hand, the present invention provides a battery, comprising the battery cover in any of the above solutions.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a battery cover plate, comprising a cover plate body and an explosion-proof valve. A plurality of reinforcing ribs are provided within a mounting hole on the cover plate body, one end of each of the reinforcing ribs being connected to the inner wall of the mounting hole, while the other ends of each of the reinforcing ribs converge and connect at the center of the mounting hole. The reinforcing ribs support the inner wall of the mounting hole, thereby improving the structural strength of the cover plate body at the location where the mounting hole is provided. The explosion-proof valve comprises a valve body and a connecting portion, the end surface of the connecting portion proximal to the cover plate body being in contact with the bottom wall of a sink, and the peripheral sidewalls of the connecting portion being welded to the sidewalls of the sink. The valve body is provided with a weak portion and a convex rib, with the convex rib being provided on the inner side of the weak portion. The provision of the weak portion allows high-temperature, high-pressure gas to break through the weak portion when the pressure inside the battery is high, thereby forming an exhaust channel in the valve body, thereby achieving pressure relief and ensuring battery safety. The provision of the convex rib can improve the structural strength of the explosion-proof valve, prevent deformation of the weak portion on the valve body, ensure stable valve opening pressure of the explosion-proof valve, and enhance battery reliability.

[0022] The utility model also provides a battery including the above-mentioned battery cover. Since the cover body of the battery cover is provided with reinforcing ribs in the mounting hole to support the mounting hole, the structural strength of the cover body at the location where the mounting hole is provided is improved. Furthermore, the ribs are provided on the explosion-proof valve to improve the valve's ability to resist deformation, ensuring a stable valve opening pressure, and enhancing the reliability and safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded view of the battery cover provided in Example 1 of the present utility model;

[0024] Figure 2 This is a top view of the battery cover provided in Example 1 of the present utility model;

[0025] Figure 3 yes Figure 2 Cross-sectional view of the middle AA section;

[0026] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0027] Figure 5 This is a top view of the cover body provided in Example 1 of the present utility model;

[0028] Figure 6 This is a top view of the explosion-proof valve provided in Example 1 of the present utility model;

[0029] Figure 7 This is a top view of the cover body provided in the second embodiment of the present utility model;

[0030] Figure 8 This is a top view of the cover body provided in Example 3 of the present utility model.

[0031] In the picture:

[0032] 100. Cover plate body; 110. Mounting hole; 111. Reinforcement rib; 112. Support rib; 120. Sunk platform; 121. Bottom wall; 122. Platform side wall; 200. Explosion-proof valve; 210. Valve body; 211. Weak part; 212. Convex rib; 220. Connecting part; 230. Transition part. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] Example 1

[0038] like Figures 1-4As shown, this embodiment provides a battery cover, which includes a cover body 100 and an explosion-proof valve 200. A mounting hole 110 is provided on the cover body 100, and a plurality of reinforcing ribs 111 are provided in the mounting hole 110. One end of the plurality of reinforcing ribs 111 is connected to the inner wall of the mounting hole 110, and the other ends of the plurality of reinforcing ribs 111 converge to the center point of the mounting hole 110 for connection. By providing the reinforcing ribs 111 in the mounting hole 110, the cover body 100 can resist the pressure along the width direction of the cover body 100 and the pressure along the length direction of the cover body 100, thereby avoiding the bending deformation of the cover body 100, thereby ensuring that the structural strength of the cover body 100 after being welded to the shell in the later stage is high, and the reliability of the battery is high. Among them, the width direction of the cover body 100 is Figure 1 In the Y-axis direction shown in FIG, the length direction of the cover body 100 is Figure 1 The X-axis direction shown in .

[0039] A sink 120 is provided on one of the end faces of the cover body 100. The sink 120 is coaxial with the mounting hole 110 and is interconnected. The explosion-proof valve 200 includes a valve body 210 and a connecting portion 220. The connecting portion 220 is annular and is located circumferentially of the valve body 210. The explosion-proof valve 200 is installed into the mounting hole 110 from the side of the cover body 100 where the sink 120 is provided. Along the axial direction of the mounting hole 110, the end face of the connecting portion 220 close to the side of the cover body 100 abuts against the bottom wall 121 of the sink 120. Along the radial direction of the mounting hole 110, the peripheral side wall of the connecting portion 220 is welded to the side wall 122 of the sink 120. By providing the sink 120, the end surface of the explosion-proof valve 200 facing away from the cover body 100 is lower than the end surface of the cover body 100 on the side provided with the sink 120, which is beneficial to reducing the thickness of the cover body 100 along the axial direction of the mounting hole 110. At the same time, it can provide a certain degree of protection for the explosion-proof valve 200, preventing it from being bumped and causing unstable valve opening pressure. Figure 1 The Z-axis direction shown in is the axial direction of the mounting hole 110, Figure 1 The X-axis and Y-axis directions shown in the figure are radial directions of the mounting hole 110. In other words, the welds between the connecting portion 220 and the sink 120 are arranged in a ring shape around the explosion-proof valve 200, ensuring a stable and reliable connection between the explosion-proof valve 200 and the cover body 100, and a good seal between the two.

[0040] Furthermore, the valve body 210 is provided with a weakened portion 211 and a rib 212. The weakened portion 211 is annular and has the same shape as the connecting portion 220. The weakened portion 211 is coaxial with the connecting portion 220. The provision of the weakened portion 211 allows high pressure inside the battery to cause high-temperature, high-pressure gas to break through the weakened portion 211, thereby forming an exhaust channel in the valve body 210, thereby achieving pressure relief and ensuring battery safety. Optionally, a rib 212 is further provided inside the weakened portion 211. The provision of the rib 212 improves the structural strength of the valve body 210 of the explosion-proof valve 200, allowing the explosion-proof valve 200 to withstand pressure along its width and length, thereby preventing deformation of the weakened portion 211 on the valve body 210. This ensures a stable opening pressure for the explosion-proof valve 200 and enhances battery reliability.

[0041] Continue to see Figure 2 and Figure 5 In this embodiment, the length direction of the explosion-proof valve 200 is the same as the length direction of the cover body 100, and the width direction of the explosion-proof valve 200 is the same as the width direction of the cover body 100. The length-to-width ratio of the explosion-proof valve 200 is k1, and the value range of k1 is 4≤k1≤5. For example, the value of k1 can be 4, 4.5 or 5. The length-to-width ratio of the cover body 100 is k2, and the value range of k2 is 9≤k2≤10. For example, the value of k2 can be 9, 9.5 or 10. By controlling the value of k2 within the above value range, the size of the cover body 100 along its width direction is smaller, which is conducive to the miniaturization of the battery and makes the battery thinner and lighter. By controlling the value of k1 within the above value range, the effective area of ​​the explosion-proof valve 200 is large enough, the exhaust is relatively smooth, the pressure relief needs of the battery are met, and the battery safety is ensured. It should be noted that the effective area of ​​the explosion-proof valve 200 is the area of ​​the portion enclosed by the weak portion 211 on the valve body 210 , that is, the flow area of ​​the exhaust passage after the explosion-proof valve 200 is opened.

[0042] Furthermore, there are four reinforcing ribs 111 in the mounting hole 110, and the four reinforcing ribs 111 are arranged in an "X" shape. That is, each reinforcing rib 111 is aligned with the cover body 100 along its width direction ( Figure 5 The central axis b of the cover body 100 along the Y-axis direction) is set at an angle, and the angle between each reinforcing rib 111 and the central axis b of the cover body 100 along its width direction is α, and the value range of the angle α is 60°≤α≤80°. For example, the value of α can be 60°, 70°, 75° or 80°, etc. Of course, in other embodiments, the value of α can also be other values ​​within the above value range, which are not listed here one by one. By setting the four reinforcing ribs 111 at an angle to the central axis b of the cover body 100 along its width direction, the adjacent two reinforcing ribs 111 and the width direction ( Figure 5 The side walls of the mounting holes 110 (in the Y-axis direction shown in FIG) form a stable triangular structure, or two adjacent reinforcing ribs 111 and the mounting holes 110 in the length direction ( Figure 5 The side walls (in the X-axis direction shown in the figure) form a stable triangular structure, which can effectively resist the pressure along the width direction of the cover body 100 and the pressure along the length direction of the cover body 100. The reinforcing ribs 111 have a good supporting effect on the mounting hole 110 of the cover body 100, avoiding bending and deformation of the cover body 100, and ensuring the reliability of the battery.

[0043] Continue to see Figure 3 and Figure 4 The explosion-proof valve 200 in this embodiment also includes a transition portion 230, with two sides connecting the valve body 210 and the connecting portion 220, respectively. The valve body 210 protrudes toward the side away from the cover body 100. A gap g is defined between the valve body 210 and the reinforcing rib 111. The value of g ranges from 0.05 mm to g and from 0.25 mm to g. For example, the value of g can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, or 0.25 mm. Providing a gap g between the valve body 210 and the reinforcing rib 111 prevents interference between the explosion-proof valve 200 and the cover body 100 during assembly, resulting in a higher assembly pass rate. Furthermore, the protrusion of the valve body 210 away from the cover body 100 makes it easier for the explosion-proof valve 200 to open when its opening pressure is reached, preventing the explosion-proof valve 200 from failing to open properly after reaching its opening pressure, thereby ensuring battery safety.

[0044] Furthermore, in this embodiment, the end surface of the reinforcing rib 111 facing the explosion-proof valve 200 is coplanar with the bottom wall 121 of the sink 120. The reinforcing rib 111 can be stamped together with the mounting hole 110 when manufacturing the cover body 100, which simplifies the manufacturing process and improves processing efficiency.

[0045] The weak portion 211 on the valve body 210 is a notch, which can be machined into the valve body 210. The residual thickness at the notch is D1, and the thickness of the valve body 210 is D, where D1 < D. By reducing the thickness of the weak portion 211, when the pressure inside the battery exceeds the opening pressure of the explosion-proof valve 200, the weak portion 211 will break, separating the inner portion enclosed by the weak portion 211 from the valve body 210, thereby forming a vent channel in the valve body 210.

[0046] Optionally, along the direction perpendicular to the end surface of the cover body 100 (ie Figure 3(in the Z-axis direction shown in FIG), the projection of the weak portion 211 on the cover body 100 falls within the projection of the mounting hole 110 on the cover body 100. This allows the gas inside the battery to directly act on the weak portion 211 of the explosion-proof valve 200, stabilizing the valve opening pressure of the explosion-proof valve 200 and improving the safety performance of the battery.

[0047] Continue to see Figure 6 There are two ribs 212 on the valve body 210, and both ribs 212 are located on the inner side of the weak portion 211 on the valve body 210. Both ribs 212 are arc-shaped, and the ends of the two ribs 212 are connected to the weak portion 211. The middle parts of the two ribs 212 protrude towards each other and intersect at the center point of the valve body 210. The two ribs 212 form an "X" shape, which is similar to the shape of the reinforcement rib 111 in the mounting hole 110. By setting the two ribs 212 in an "X" shape, the adjacent two ribs 212 and the explosion-proof valve 200 in the length direction ( Figure 5 The connecting portion 220 in the X-axis direction shown in FIG2 forms a stable triangular structure, and each rib 212 is connected to the explosion-proof valve 200 in the width direction ( Figure 5 The connecting portion 220 (in the Y-axis direction shown in the figure) forms a stable triangular structure, which can effectively resist the pressure along the length direction of the explosion-proof valve 200 and the pressure along the width direction of the explosion-proof valve 200. It has a good supporting effect on the explosion-proof valve 200, the weak portion 211 is not easily deformed, the valve opening pressure is stable, and the battery has high reliability.

[0048] This embodiment also provides a battery, including a shell, an electrode group, and the above-mentioned battery cover. An opening is provided on one side of the shell, and the electrode group is installed in the shell through the opening, and the battery cover is enclosed in the opening of the shell. A closed installation cavity is formed by the shell and the battery cover, and the electrode group is located in the installation cavity. Since the cover body 100 of the battery cover is provided with a reinforcing rib 111 in the installation hole 110 to support the inner wall of the installation hole 110, the structural strength of the cover body 100 at the installation hole 110 is improved. At the same time, a convex rib 212 is provided on the explosion-proof valve 200, which improves the ability of the explosion-proof valve 200 to resist deformation, ensures that the valve opening pressure of the explosion-proof valve 200 is stable, and the reliability and safety of the battery are high.

[0049] Example 2

[0050] This embodiment provides a battery cover, see Figure 7 The difference between this embodiment and the battery cover in the first embodiment is that the mounting hole 110 in this embodiment has eight reinforcing ribs 111, which are arranged in a "rice" shape. Two of the reinforcing ribs 111 are arranged along the length direction of the cover body 100 ( Figure 7The two reinforcing ribs 111 are arranged along the width direction of the cover body 100 ( Figure 7 The other four reinforcing ribs 111 are arranged at an angle to the central axis b of the cover body 100 along its width direction. The angle α between each reinforcing rib 111 and the central axis b of the cover body 100 along its width direction is 60°≤α≤80°. For example, the value of α can be 60°, 70°, 75°, or 80°. Of course, in other embodiments, the value of α can also be other values ​​within the above range, which are not listed here.

[0051] Therefore, the eight reinforcing ribs 111 can effectively resist the pressure along the width direction of the cover body 100 and the pressure along the length direction of the cover body 100. The reinforcing ribs 111 have a good supporting effect on the mounting hole 110 of the cover body 100, avoiding the bending deformation of the cover body 100 and ensuring the high reliability of the battery.

[0052] This embodiment also provides a battery, including a shell, an electrode group, and the above-mentioned battery cover. An opening is provided on one side of the shell, and the electrode group is installed in the shell through the opening, and the battery cover is enclosed in the opening of the shell. A closed installation cavity is formed by the shell and the battery cover, and the electrode group is located in the installation cavity. Since the cover body 100 of the battery cover is provided with a reinforcing rib 111 in the installation hole 110 to support the inner wall of the installation hole 110, the structural strength of the cover body 100 at the installation hole 110 is improved. At the same time, a convex rib 212 is provided on the explosion-proof valve 200, which improves the ability of the explosion-proof valve 200 to resist deformation, ensures that the valve opening pressure of the explosion-proof valve 200 is stable, and the reliability and safety of the battery are high.

[0053] The remaining structures in this embodiment are the same as those in the first embodiment and will not be described again here.

[0054] Example 3

[0055] This embodiment provides a battery cover, see Figure 8 The difference between the battery cover plate in the embodiment 1 is that four supporting ribs 112 are provided in the mounting hole 110, and the two ends of each supporting rib 112 are connected to the midpoint of a reinforcing rib 111. The supporting ribs 112 can provide two adjacent reinforcing ribs 111 with a width direction of the cover plate body 100 ( Figure 8 The supporting force of the Y-axis direction shown in FIG1 or the supporting rib 112 can provide the supporting force of the two adjacent reinforcing ribs 111 along the length direction of the cover body 100 ( Figure 8The reinforcing ribs 111 can effectively resist the pressure along the width direction of the cover plate body 100 and the pressure along the length direction of the cover plate body 100. The reinforcing ribs 111 provide good support for the mounting hole 110 of the cover plate body 100, preventing the cover plate body 100 from bending and deformation, and ensuring high reliability of the battery.

[0056] This embodiment also provides a battery, including a shell, an electrode group, and the above-mentioned battery cover. An opening is provided on one side of the shell, and the electrode group is installed in the shell through the opening, and the battery cover is enclosed in the opening of the shell. A closed installation cavity is formed by the shell and the battery cover, and the electrode group is located in the installation cavity. Since the cover body 100 of the battery cover is provided with a reinforcing rib 111 in the installation hole 110 to support the inner wall of the installation hole 110, the structural strength of the cover body 100 at the installation hole 110 is improved. At the same time, a convex rib 212 is provided on the explosion-proof valve 200, which improves the ability of the explosion-proof valve 200 to resist deformation, ensures that the valve opening pressure of the explosion-proof valve 200 is stable, and the reliability and safety of the battery are high.

[0057] The remaining structures in this embodiment are the same as those in the first embodiment and will not be described again here.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery cover, characterized in that: include: A cover plate body (100), wherein a mounting hole (110) is provided on the cover plate body (100), a plurality of reinforcing ribs (111) are provided in the mounting hole (110), one end of the plurality of reinforcing ribs (111) is connected to the inner wall of the mounting hole (110), and the other ends of the plurality of reinforcing ribs (111) converge to be connected at the center point of the mounting hole (110); a sinking platform (120) is provided on one end surface of the cover plate body (100), and the sinking platform (120) is coaxial with the mounting hole (110); The explosion-proof valve (200) comprises a valve body (210) and a connecting portion (220), wherein the connecting portion (220) is located in the circumference of the valve body (210) and abuts against the bottom wall (121) of the sink (120). The valve body (210) is provided with a weak portion (211) and a convex rib (212), wherein the weak portion (211) is annular and located in the circumference of the convex rib (212).

2. The battery cover according to claim 1, characterized in that: The plurality of reinforcing ribs (111) are arranged in an "X" shape or a "R" shape.

3. The battery cover according to claim 1, characterized in that: A supporting rib (112) is further provided in the mounting hole (110), and both ends of the supporting rib (112) are respectively connected to the midpoint of one of the reinforcing ribs (111).

4. The battery cover according to claim 1, characterized in that: The explosion-proof valve (200) further includes a transition portion (230), the two sides of which are respectively connected to the valve body (210) and the connecting portion (220), the valve body (210) protruding toward a side away from the cover plate body (100), and a gap g is provided between the valve body (210) and the reinforcing rib (111), wherein the value range of g is 0.05 mm ≤ g ≤ 0.25 mm.

5. The battery cover according to claim 4, characterized in that: The end surface of the reinforcing rib (111) facing the explosion-proof valve (200) and the bottom wall (121) of the sink (120) are located in the same plane.

6. The battery cover according to claim 1, characterized in that: There are two convex ribs (212) on the valve body (210), both of which are arc-shaped. The two convex ribs (212) protrude toward each other and intersect at the center point of the valve body (210).

7. The battery cover according to claim 1, characterized in that: The weak portion (211) on the valve body (210) is a notch, the residual thickness at the notch is D1, the thickness of the valve body (210) is D, and D1<D.

8. The battery cover according to claim 1, characterized in that: The length direction of the explosion-proof valve (200) is the same as the length direction of the cover plate body (100), and the width direction of the explosion-proof valve (200) is the same as the width direction of the cover plate body (100); The explosion-proof valve (200) has an aspect ratio of k1, and the value range of k1 is 4≤k1≤5; The aspect ratio of the cover plate body (100) is k2, and the value range of k2 is 9≤k2≤10.

9. The battery cover according to claim 1, characterized in that: Along a direction perpendicular to the end surface of the cover plate body (100), the projection of the weak portion (211) on the cover plate body (100) falls within the projection of the mounting hole (110) on the cover plate body (100).

10. A battery, characterized in that: The battery cover comprises the battery cover according to any one of claims 1 to 9.

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