Battery cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate assembly. The battery cover plate assembly comprises a cover plate body and a pole assembly, a pole mounting hole is formed in the cover plate body, a limiting clamping groove is formed in the inner side wall of the pole mounting hole in an inward concave mode, the pole assembly is installed on the cover plate body through the pole mounting hole, the pole assembly comprises a conductive pole and upper plastic, and the upper plastic surrounds the conductive pole. A limiting clamping block is arranged on the outer portion of the upper plastic in a protruding mode, the section of the limiting clamping block is in a T shape, the limiting clamping block comprises a first clamping part and a second clamping part, the second clamping part is arranged on the first clamping part in an annular protruding mode, and the periphery of the second clamping part abuts against the inner side wall of the limiting clamping groove. Through the arrangement, the second clamping part can increase the connection tightness of the upper plastic and the cover plate body, so that the installation stability between the upper plastic and the cover plate body can be further enhanced, the torsion resistance of the conductive column is effectively improved, and the risk that the conductive column rotates and even gets loose is avoided.

Description

Technical Field

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

[0002] With the rapid development of new energy, power batteries are increasingly being used. As a crucial component of batteries, the cover plate assembly is directly related to their stability and safety. The cover plate assembly typically includes a cover plate body, a terminal post, an upper plastic component, a lower plastic component, and a sealing ring. The upper plastic component is positioned between the terminal post and the cover plate body, riveting the cover plate body and the terminal post together. However, existing technologies fail to effectively secure the terminal post, resulting in weak resistance to external torsional forces. This results in poor anti-rotation performance and safety.

[0003] To address this issue, existing technologies offer an injection-molded cover plate. By adding a notch to the cover plate body and a stopper to the upper plastic, the torque between the upper plastic and the cover plate body can be increased, thereby improving safety. However, this arrangement can only meet the requirement for a 5 NM torque on the pole, and cannot meet higher requirements for pole torque.

[0004] Based on the above, there is an urgent need for a battery cover assembly and a battery to solve the defects in the existing technology. Utility Model Content

[0005] The first object of the present utility model is to provide a battery cover assembly, which can make the pole receive greater torsional resistance when it is about to rotate, thereby further enhancing safety and stability.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The battery cover assembly includes a cover body and a pole assembly, the cover body is provided with a pole mounting hole, the inner side wall of the pole mounting hole is recessed inwardly with a limiting slot, the pole assembly is mounted on the cover body through the pole mounting hole, the pole assembly includes a conductive column and an upper plastic, the upper plastic is arranged around the outside of the conductive column, a limiting block is convexly provided on the outside of the upper plastic, the cross-section of the limiting block is T-shaped, and includes a first clamping portion and a second clamping portion, the second clamping portion is convexly arranged on the first clamping portion, and the outer periphery of the second clamping portion abuts against the inner side wall of the limiting slot.

[0008] Preferably, the outer periphery of the second clamping portion is provided with a first round chamfer.

[0009] Preferably, the second engaging portion is provided with anti-slip grooves on a surface relative to the bottom of the limiting slot.

[0010] Preferably, a side wall of the position-limiting slot is inwardly recessed with a position-avoiding slot, and the first clamping portion is position-limitingly clamped in the position-limiting slot.

[0011] Preferably, the inner side wall of the limiting slot is protrudingly provided with a second round chamfer, the connection between the first clamping portion and the second clamping portion is provided with a third round chamfer, and the connection between the second clamping portion and the upper plastic is provided with a fourth round chamfer.

[0012] Preferably, the cross-sectional shape of the first clamping portion is trapezoidal, and the cross-sectional area of the first clamping portion gradually increases in the radial direction from the center to the edge of the upper plastic.

[0013] Preferably, in the radial direction from the center to the edge of the upper plastic, the length of the second clamping portion ranges from 0.1 mm to 0.5 mm.

[0014] Preferably, along the circumferential direction of the upper plastic, at least two limiting blocks are spaced apart on the upper plastic.

[0015] Preferably, an anti-twist notch is provided on the conductive column, and a plastic injection layer is filled between the upper plastic and the anti-twist notch.

[0016] The beneficial effects of the battery cover assembly provided by the present invention are as follows: since a limiting block with a gradually increasing cross-sectional shape is provided on the outside of the upper plastic, and the second clamping portion can further increase the connection tightness between the upper plastic and the cover body, compared with the upper plastic in the prior art, the installation stability between the upper plastic and the cover body can be further enhanced, thereby effectively improving the torsional resistance of the conductive column and avoiding the risk of the conductive column rotating or even loosening.

[0017] The second object of the present utility model is to provide a battery, which can further improve the use stability and safety performance of the battery by using the above-mentioned battery cover assembly.

[0018] To achieve this purpose, the present invention adopts the following technical solutions:

[0019] A battery, comprising the above-mentioned battery cover assembly.

[0020] The battery cover assembly provided by the present invention has the beneficial effect that, because the battery has the battery cover assembly as described above, the battery has higher stability and safety performance in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a battery cover assembly provided by an embodiment of the present utility model;

[0022] Figure 2is a cross-sectional view of the battery cover assembly provided by an embodiment of the present utility model at a first viewing angle;

[0023] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0024] Figure 4 is a cross-sectional view of the battery cover assembly provided by an embodiment of the present utility model at a second viewing angle;

[0025] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 1 is a top view of a battery cover assembly provided by an embodiment of the present utility model;

[0027] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle;

[0028] Figure 8 This is a schematic diagram of the structure of the upper plastic provided by an embodiment of the utility model;

[0029] Figure 9 yes Figure 8 A partial enlarged view of point D in the middle;

[0030] Figure 10 It is a structural schematic diagram of the conductive column provided by an embodiment of the utility model.

[0031] In the picture:

[0032] 1. Cover plate body; 11. Pole mounting hole; 111. Limiting slot; 1111. Avoiding slot; 1112. Second round chamfer;

[0033] 201, positive electrode post assembly; 202, negative electrode post assembly; 21, conductive post; 211, anti-twist notch; 22, upper plastic; 221, limit block; 2211, first clamping portion; 2212, second clamping portion; 22121, first fillet; 2213, third fillet; 2214, fourth fillet;

[0034] 3. Explosion-proof valve assembly;

[0035] 4. Remove plastic;

[0036] 5. Sealing ring. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0041] The battery cover assembly and battery provided by the present invention are described below with reference to the accompanying drawings and specific embodiments. The battery in this embodiment is a square battery, but of course, in other embodiments, it can also be a cylindrical battery, and the present invention is not limited to this.

[0042] Based on the existing technology, this embodiment proposes a battery cover assembly to solve the technical problems in the background technology. Figures 1 to 3As shown, the battery cover assembly includes a cover body 1, a pole assembly, an explosion-proof valve assembly 3, a lower plastic 4, and a sealing ring 5. The pole assembly includes a positive pole assembly 201 and a negative pole assembly 202; a pole mounting hole 11 is provided on each side of the cover body 1, one pole mounting hole 11 is used to install the positive pole assembly 201, and the other pole mounting hole 11 is used to install the negative pole assembly 202; the explosion-proof valve assembly 3 is provided at the center of the cover body 1 and can be connected to the cover body 1 by laser welding; the lower plastic 4 is provided on the lower surface of the cover body 1 and is used to electrically insulate the cover body 1 from the battery cell. The sealing ring 5 is sleeved on the pole assembly. On the one hand, it can ensure the insulation properties between the pole assembly and the cover body 1, preventing the cover body 1 from being charged. On the other hand, it ensures the sealing of the connection between the pole assembly and the cover body 1, thereby improving the reliability of the entire battery cover assembly.

[0043] It should be noted that the pole assembly mentioned below can be either the positive pole assembly 201 or the negative pole assembly 202, and this embodiment is not limited thereto. The following description uses the positive pole assembly 201 as an example. Of course, when the pole assembly is the positive pole assembly 201, the other structures are the same as when the pole assembly is the positive pole assembly 201, and will not be further described here.

[0044] Specifically, refer to Figures 4 to 9 As shown, the inner side wall of the pole mounting hole 11 is recessed with a limiting card slot 111, and the pole assembly includes a conductive column 21 and an upper plastic 22. The upper plastic 22 is arranged around the outside of the conductive column 21, and a limiting card block 221 is protruded from the outside of the upper plastic 22, and includes a first clamping portion 2211 and a second clamping portion 2212. The second clamping portion 2212 is convexly arranged on the first clamping portion 2211 so that the cross-sectional shape of the limiting card block 221 is T-shaped, and the outer periphery of the second clamping portion 2212 abuts against the inner side wall of the limiting card slot 111. Since the upper plastic 22 is provided with a limiting block 221 with a gradually increasing cross-sectional shape on the outside, and the second clamping portion 2212 can further increase the connection tightness between the upper plastic 22 and the cover body 1, compared with the upper plastic 22 in the prior art, the installation stability between the upper plastic 22 and the cover body 1 can be further enhanced, thereby effectively improving the torsional resistance of the conductive column 21 and avoiding the risk of the conductive column 21 rotating or even loosening.

[0045] In this embodiment, the upper plastic 22 and the lower plastic 4 are made of rubber or plastic. The materials of the upper plastic 22 and the lower plastic 4 can be the same or different, and this embodiment does not limit this. The cover body 1 and the conductive column 21 are made of aluminum. It should be noted that the conductive column 21 includes a positive conductive column 21 and a negative conductive column 21. The positive conductive column 21 is integrally formed from all-aluminum material, and the negative conductive column 21 is a copper-aluminum composite material, and can be processed by cold rolling or hot rolling.

[0046] Specifically, in this embodiment, referring to Figure 5 、 Figure 9 As shown, the cross-sectional shape of the limiting block 221 is trapezoidal, and the cross-sectional area of the limiting block 221 gradually increases in the radial direction from the center of the upper plastic 22 to the edge of the upper plastic 22, so as to strengthen the structural strength of the limiting block 221 and improve the torsional deformation resistance of the limiting block 221.

[0047] Furthermore, in this embodiment, referring to Figure 7 As shown, the side wall of the limiting slot 111 is recessed with an annular avoidance slot 1111, and the first clamping portion 2211 is limited and clamped in the avoidance slot 1111, so that the gap between the first clamping portion 2211 and the second clamping portion 2212 can be filled by the top cover body, thereby further strengthening the connection tightness between the limiting clamping block 221 and the top cover body, thereby further enhancing the connection stability between the upper plastic 22 and the top cover body.

[0048] More specifically, in this embodiment, combined with Figure 7 、 Figure 9 As shown, the inner sidewall of the limiting card slot 111 is protrudingly provided with a second rounded chamfer 1112, the connection between the first clamping portion 2211 and the second clamping portion 2212 is provided with a third rounded chamfer 2213, and the connection between the second clamping portion 2212 and the upper plastic 22 is provided with a fourth rounded chamfer 2214. The provision of the second rounded chamfer 1112, the third rounded chamfer 2213, and the fourth rounded chamfer 2214 can reduce the degree of wear on the portion of the limiting card slot 111 inserted into the gap between the first clamping portion 2211 and the second clamping portion 2212 and the limiting card block 221, thereby effectively extending the service life of the entire battery top cover assembly.

[0049] Specifically, in this embodiment, continue to refer to Figure 9As shown, the outer periphery of the second clamping portion 2212 is provided with a first round chamfer 22121 to reduce the wear between the second clamping portion 2212 and the cover body 1, thereby ensuring the clamping tightness between the upper plastic 22 and the top cover body, thereby further ensuring the torsional resistance of the pole. It should be noted that the present invention does not limit the chamfer angles of the first round chamfer 22121, the second round chamfer 1112, the third round chamfer 2213 and the fourth round chamfer 2214. The chamfer angles between the first round chamfer 22121, the second round chamfer 1112, the third round chamfer 2213 and the fourth round chamfer 2214 can be the same or different. The specific chamfer angles can be determined according to the actual working conditions.

[0050] More specifically, in this embodiment, the second clamping portion 2212 is further provided with anti-slip grooves on the surface relative to the bottom of the limiting slot 111. The setting of the anti-slip grooves can increase the contact area between the second clamping portion 2212 and the limiting slot 111, thereby increasing the friction between the second clamping portion 2212 and the limiting slot 111, and further improving the connection stability and safety between the upper plastic 22 and the cover body 1.

[0051] Further, in this embodiment, continue to refer to Figure 9 As shown, the length m of the second engaging portion 2212 in the radial direction from the center of the upper plastic 22 to the edge of the upper plastic 22 ranges from 0.1 mm to 0.5 mm. For example, the length m can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm. This arrangement allows the length of the second engaging portion 2212 to be controlled within a reasonable range, neither being too long to prevent the formation of a correspondingly sized retaining groove 111 on the cover body 1, nor too short to ensure a stable connection between the upper plastic 22 and the cover body 1.

[0052] Preferably, in this embodiment, Figure 8 As shown, at least two limiting blocks 221 are spaced apart on the upper plastic 22 along the circumferential direction of the upper plastic. In this way, the anti-twist capability between the upper plastic 22 and the cover body 1 can be further enhanced while controlling the cost and manufacturing complexity. Of course, it is understandable that in other parallel embodiments, the number of limiting blocks 221 can be only one, or more, such as three, four, or even five, to meet the requirements for anti-twist capability between the upper plastic 22 and the cover body 1 under different actual working conditions. Moreover, it should be noted that the number of limiting blocks 221 can also be linked to the length m of the second clamping portion 2212. For example, when the length m of the second clamping portion 2212 is small, in order to enhance the connection stability between the upper plastic 22 and the cover body 1, more limiting blocks 221 can be provided to compensate for the anti-twist capability.

[0053] Optionally, in this embodiment, an anti-twist notch 211 is provided on the conductive post 21, and a layer of injection molding (not shown) is provided between the upper plastic 22 and the anti-twist notch 211. This allows the injection molding to fill the gap between the upper plastic 22 and the anti-twist notch 211 during the injection molding process. After the injection molding solidifies, the conductive post 21 and the upper plastic 22 are fixedly connected, thereby effectively preventing the conductive post 21 from rotating relative to the cover body 1 and improving the stability of the fixation. Preferably, two anti-twist notches 211 are provided, and the two anti-twist notches 211 are symmetrically arranged on both sides of the conductive post 21.

[0054] This embodiment further provides a battery, which includes the above-mentioned battery cover assembly. Due to the battery cover assembly described above, the battery has higher stability and safety performance in use.

[0055] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0056] 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. Battery cover assembly, characterized in that: The invention comprises a cover plate body (1) and a pole assembly, wherein the cover plate body (1) is provided with a pole mounting hole (11), the inner side wall of the pole mounting hole (11) is provided with a limit slot (111) inwardly concavely, and the pole assembly is installed on the cover plate body (1) through the pole mounting hole (11), and the pole assembly comprises a conductive column (21) and an upper plastic (22), the outer side of the conductive column (21) is surrounded by the upper plastic (22), and the outer side of the upper plastic (22) is provided with a limit block (221), the cross-section of the limit block (221) is T-shaped, and comprises a first clamping portion (2211) and a second clamping portion (2212), the second clamping portion (2212) is provided in an annular manner on the first clamping portion (2211), and the outer periphery of the second clamping portion (2212) abuts against the inner side wall of the limit slot (111).

2. The battery cover assembly according to claim 1, characterized in that: The outer periphery of the second clamping portion (2212) is provided with a first round chamfer (22121).

3. The battery cover assembly according to claim 1, characterized in that: The second engaging portion (2212) is provided with anti-slip grooves on a surface relative to the bottom of the position-limiting slot (111).

4. The battery cover assembly according to claim 1, characterized in that: A side wall of the position-limiting slot (111) is inwardly recessed with a position-avoiding slot (1111), and the first clamping portion (2211) is position-limitingly clamped in the position-avoiding slot (1111).

5. The battery cover assembly according to claim 4, characterized in that: The inner side wall of the limiting slot (111) is protrudingly provided with a second round chamfer (1112), the connection between the first clamping portion (2211) and the second clamping portion (2212) is provided with a third round chamfer (2213), and the connection between the second clamping portion (2212) and the upper plastic (22) is provided with a fourth round chamfer (2214).

6. The battery cover assembly according to any one of claims 1 to 5, characterized in that: The cross-sectional shape of the limiting block (221) is trapezoidal, and the cross-sectional area of the limiting block (221) gradually increases in the radial direction from the center to the edge of the upper plastic (22).

7. The battery cover assembly according to any one of claims 1 to 5, characterized in that: In the radial direction from the center to the edge of the upper plastic (22), the length dimension of the second clamping portion (2212) ranges from 0.1 mm to 0.5 mm.

8. The battery cover assembly according to any one of claims 1 to 5, characterized in that: At least two of the limiting blocks (221) are spaced apart on the upper plastic (22) along the circumferential direction of the upper plastic (22).

9. The battery cover assembly according to any one of claims 1 to 5, characterized in that: An anti-twist notch (211) is provided on the conductive column (21), and an injection molding layer is filled between the upper plastic (22) and the anti-twist notch (211).

10. A battery, characterized in that A battery cover assembly comprising the battery cover assembly according to any one of claims 1 to 9.

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