Battery cover plate and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a single battery, the battery cover plate comprises a cover plate body, an insulating part and at least one electrode assembly, the insulating part is arranged on one side of the cover plate body, and the electrode assembly is arranged on the other side of the cover plate body. The electrode assembly penetrates through the insulating part and the cover plate body in a sealing manner and is fixedly connected with the cover plate body; wherein a plurality of reinforcing ribs are arranged on the cover plate body, and the arrangement density of the reinforcing ribs located in the middle of the cover plate body is larger than that of the reinforcing ribs located at the position, close to the periphery, of the cover plate body. According to the battery cover plate, the structural strength of the cover plate body can be improved, so that the safety of a single battery provided with the battery cover plate is improved.

Description

Technical Field

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

[0002] As an important accessory in a single battery, the battery cover can not only seal the battery by isolating the internal and external environments after welding with the shell, but also connect the internal and external circuits to transmit the internal current of the battery to the outside through the top cover pole, thus playing a guiding role.

[0003] At present, with the development of single cells towards high energy density and large volume, the surface area of ​​the battery cover is getting larger and larger. After the area of ​​the battery cover increases, the structural strength of the cover body becomes relatively weak, so that when the single cell loaded with the battery cover is under pressure, the battery cover deforms from the middle to the periphery, causing the seal between the pole and the cover body to fail, resulting in problems such as air leakage and pole short circuit in the single cell, causing safety problems in the single cell.

[0004] Therefore, there is an urgent need for a battery cover and a single battery to solve the above technical problems. Utility Model Content

[0005] One object of the utility model is to provide a battery cover plate, which can improve the structural strength of the cover plate body, thereby improving the safety of the single battery installed with the battery cover plate.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery cover, comprising a cover body, an insulating member and at least one electrode assembly, wherein the insulating member is arranged on one side of the cover body, and the electrode assembly is sealingly penetrated through the insulating member and the cover body and fixedly connected to the cover body; wherein the cover body is provided with a plurality of reinforcing ribs, and the arrangement density of the reinforcing ribs located in the middle of the cover body is greater than the arrangement density of the reinforcing ribs located near the periphery of the cover body.

[0008] Optionally, the arrangement density of the reinforcing ribs gradually decreases along the direction from the middle of the cover plate body to the outer periphery of the cover plate body.

[0009] Optionally, the reinforcing ribs are arranged in multiple rows at intervals along the length direction of the cover body; and / or,

[0010] The reinforcing ribs are arranged in at least one row at intervals along the width direction of the cover plate body.

[0011] Optionally, the reinforcing ribs are straight, S-shaped, broken line-shaped, diamond-shaped or square-shaped.

[0012] Optionally, at least one mounting hole is provided on the cover plate body, and the electrode assembly is mounted in the mounting hole.

[0013] Optionally, an explosion-proof hole is provided on the cover plate body, and an explosion-proof valve is installed in the explosion-proof hole.

[0014] Optionally, a first annular reinforcement portion is provided around the mounting hole; and / or,

[0015] A second annular reinforcement portion is arranged around the explosion-proof hole.

[0016] Optionally, the cover plate body and the reinforcing ribs are integrally stamped and formed.

[0017] Optionally, a plurality of reinforcing structures are provided on the insulating member, and the plurality of reinforcing structures and the plurality of reinforcing ribs are arranged in a one-to-one corresponding manner.

[0018] Another object of the present utility model is to provide a single cell battery, which can improve the structural strength of the cover plate body, thereby improving the safety of installing the single cell battery.

[0019] To achieve this purpose, the utility model adopts the following technical solutions:

[0020] The single cell battery comprises a shell, a battery cell and the battery cover plate. The battery cell is arranged in the shell, and the battery cover plate is sealed and connected to the opening of the shell.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery cover and a single cell. By arranging reinforcing ribs on the cover body, the structural strength of the cover body is enhanced and the deformation of the cover body is reduced. Moreover, since the deformation degree of the middle portion of the battery cover is higher than that of the side portions when the battery cover is deformed, the arrangement density of the reinforcing ribs located in the middle portion of the cover body is greater than the arrangement density of the reinforcing ribs located near the periphery of the cover body, so that the structural strength of the middle portion of the cover body is higher, thereby achieving effective and uniform anti-deformation capability of the cover body, thereby avoiding safety problems such as gas leakage and pole short circuit in the single cell caused by deformation of the cover body and failure of the seal between the pole and the cover body, thereby improving the safety of the single cell using the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an axonometric view of a battery cover provided by the first embodiment of the utility model;

[0024] Figure 2 It is a top view of a battery cover provided by the first embodiment of the utility model;

[0025] Figure 3It is an axonometric view of the cover body provided by the first embodiment of the utility model;

[0026] Figure 4 It is a top view of a battery cover provided by a second embodiment of the utility model;

[0027] Figure 5 It is a top view of a battery cover provided by a third embodiment of the utility model.

[0028] In the figure:

[0029] 10. Cover plate body; 101. Mounting hole; 102. Explosion-proof hole; 103. Liquid injection hole; 11. Reinforcement rib; 12. First annular reinforcement part; 13. Second annular reinforcement part;

[0030] 20. Insulating member; 30. Electrode assembly; 40. Explosion-proof valve; 50. Liquid injection structure. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Refer to the following Figures 1 to 5 The utility model introduces a battery cover plate and a single battery.

[0036] like Figures 1 to 3 As shown, this embodiment provides a battery cover, which includes a cover body 10, an insulating member 20 and at least one electrode assembly 30, the insulating member 20 is arranged on one side of the cover body 10, and the electrode assembly 30 is sealed and penetrated through the insulating member 20 and the cover body 10 and is fixedly connected to the cover body 10; wherein, a plurality of reinforcing ribs 11 are provided on the cover body 10, and the arrangement density of the reinforcing ribs 11 located in the middle of the cover body 10 is greater than the arrangement density of the reinforcing ribs 11 located near the periphery of the cover body 10.

[0037] The battery cover in this embodiment has enhanced the structural strength of the cover body 10 and reduced the deformation of the cover body 10 by arranging reinforcing ribs 11 on the cover body 10; and, because the deformation degree of the middle part of the battery cover is higher than that of the side when the battery cover is deformed, the arrangement density of the reinforcing ribs 11 located in the middle part of the cover body 10 is greater than the arrangement density of the reinforcing ribs 11 located near the periphery of the cover body 10, so that the structural strength of the middle part of the cover body 10 is higher, thereby achieving effective and uniform deformation resistance of the cover body 10, thereby avoiding safety problems such as gas leakage and pole short circuit in the single cell caused by deformation of the cover body 10 and failure of the seal between the pole and the cover body 10, thereby improving the safety of the single cell using the battery cover.

[0038] It should be noted that the arrangement density of the reinforcing ribs 11 is specifically expressed as the number of reinforcing ribs 11 provided at the position and the distance between two adjacent reinforcing ribs 11. That is, when the arrangement density is small, the number of reinforcing ribs 11 provided is small, and the distance between two adjacent reinforcing ribs 11 is large; when the arrangement density is large, the number of reinforcing ribs 11 provided is large, and the distance between two adjacent reinforcing ribs 11 is small.

[0039] Optionally, the cover body 10 and the reinforcing ribs 11 are integrally stamped and formed, which is convenient for manufacturing and does not increase the number of parts.

[0040] like Figure 2 , Figure 4 and Figure 5 As shown, optionally, the reinforcing rib 11 is in a straight line, S-shape, broken line, diamond shape or square shape, all of which can achieve the reinforcement effect on the battery cover.

[0041] In some optional embodiments, the reinforcing rib 11 is S-shaped, which can achieve the reinforcement effect on the cover body 10. At the same time, the S-shaped setting prevents the cover body 10 from having locally weak dead corners, thereby improving the reliability of the cover body 10.

[0042] In some optional embodiments, the reinforcing rib 11 is in a broken line shape, which can make the middle part of the cover body 10 more reinforced and improve the anti-deformation ability of the middle part of the cover body 10.

[0043] In some optional embodiments, the reinforcing rib 11 is in a rhombus shape, and is punched in the shape of a half rhombus three-dimensional structure to form the reinforcing rib 11, so that the cover body 10 has a higher structural strength.

[0044] In some embodiments, the arrangement density of the reinforcing ribs 11 gradually decreases along the direction from the middle of the cover body 10 to the periphery of the cover body 10. The above arrangement is designed for the situation where the battery cover gradually deforms from the middle to the periphery, thereby improving the deformation resistance of the battery cover.

[0045] In some embodiments, the reinforcing ribs 11 are arranged in a plurality of rows at intervals along the length direction of the cover body 10 to enhance the structural strength of the cover body 10 in its own length direction.

[0046] In some embodiments, the reinforcing ribs 11 are arranged in at least one row at intervals along the width direction of the cover body 10 , and such an arrangement increases the structural strength of the cover body 10 in its own width direction.

[0047] It can be understood that the arrangement of the number of rows and columns of the reinforcing ribs 11 is adaptively set according to the actual length and width of the battery cover, and is not specifically limited here.

[0048] like Figure 1 and Figure 3 As shown, in some embodiments, at least one mounting hole 101 is formed on the cover body 10, and the electrode assembly 30 is installed in the mounting hole 101, so as to realize the installation of the motor assembly.

[0049] Optionally, a first annular reinforcement portion 12 is provided around the mounting hole 101 to strengthen the structural strength of the connection position between the electrode assembly 30 and the cover body 10, further avoiding the occurrence of problems such as leakage and short circuit at the position of the electrode assembly 30, and ensuring the reliability of the battery cover.

[0050] Specifically, the electrode assembly 30 includes a pole, a seal and a first rubber package, so that the pole is installed on the cover body 10 in a sealed and insulated manner, and the pole is electrically connected to the inside and outside of the single battery.

[0051] More specifically, the pole is sequentially passed through the insulating member 20, the cover body 10 and the first rubber-coated member and is fixedly connected to the cover body 10. The sealing member is arranged between the cover body 10 and the pole to seal the mounting hole 101, so that the pole can be installed on the cover body 10 in a sealed and insulated manner, and at the same time, the pole can achieve the electrical connection function of the pole to the inside and outside of the single battery.

[0052] In some embodiments, a roll edge structure is provided on the cover body 10, and the roll edge structure is arranged around the mounting hole 101 to crimp and fix the pole. It can be understood that in the battery cover with the roll edge structure, the roll edge structure can be directly used as the first annular reinforcement part 12 to strengthen the connection of the electrode assembly 30.

[0053] In some embodiments, the electrode assembly 30 also includes a second rubber coating to achieve insulation of the rolling structure and the pole extending out of the rolling structure, thereby preventing the external connector from contacting the rolling structure when the pole is electrically connected to the external connector, causing a short circuit in the single cell, thereby improving the safety of the single cell.

[0054] In some embodiments, an explosion-proof hole 102 is opened on the cover body 10 , and an explosion-proof valve 40 is installed in the explosion-proof hole 102 to perform explosion-proof pressure relief on the inside of the single battery.

[0055] Optionally, a second annular reinforcement portion 13 is provided around the explosion-proof hole 102 to strengthen the structural strength of the connection position between the explosion-proof valve 40 and the cover body 10 , further avoiding the occurrence of problems such as air leakage at the explosion-proof valve 40 .

[0056] In some embodiments, a liquid injection hole 103 is formed on the cover body 10 , and a liquid injection structure 50 is installed in the liquid injection hole 103 for injecting liquid into and sealing the single battery.

[0057] It should be noted that the diameter of the injection hole 103 is relatively small, and the corresponding injection structure 50 is also relatively small. When the cover body 10 is deformed, it generally does not deform significantly to cause sealing failure, so no reinforcement part is provided.

[0058] In this embodiment, a plurality of reinforcing structures are provided on the insulating member 20, and the plurality of reinforcing structures and the plurality of reinforcing ribs 11 are arranged in a one-to-one correspondence, that is, reinforcement is also performed on the insulating member 20, and the structural strength of the cover body 10 is further improved through the cooperation of the reinforcing structures and the reinforcing ribs 11, so that the structural strength of the battery cover is higher and the deformation resistance is better.

[0059] This embodiment also provides a single battery, which includes a housing, a battery cell and a battery cover plate as described in any of the above schemes, wherein the battery cell is arranged in the housing, and the battery cover plate is sealed and connected to the opening of the housing. The single battery has all the beneficial effects of the above battery cover plate, which will not be described here.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery cover, characterized in that: The invention comprises a cover body (10), an insulating member (20) and at least one electrode assembly (30), wherein the insulating member (20) is arranged on one side of the cover body (10), and the electrode assembly (30) is sealingly penetrated through the insulating member (20) and the cover body (10) and is fixedly connected to the cover body (10); wherein the cover body (10) is provided with a plurality of reinforcing ribs (11), and the arrangement density of the reinforcing ribs (11) located in the middle of the cover body (10) is greater than the arrangement density of the reinforcing ribs (11) located near the periphery of the cover body (10).

2. The battery cover according to claim 1, characterized in that: Along the direction from the middle of the cover plate body (10) to the outer periphery of the cover plate body (10), the arrangement density of the reinforcing ribs (11) gradually decreases.

3. The battery cover according to claim 1, characterized in that: The reinforcing ribs (11) are arranged in a plurality of rows at intervals along the length direction of the cover plate body (10); and / or, The reinforcing ribs (11) are arranged in at least one row at intervals along the width direction of the cover plate body (10).

4. The battery cover according to claim 1, characterized in that: The reinforcing rib (11) is in a straight line, S-shape, broken line, diamond shape or square shape.

5. The battery cover according to claim 1, characterized in that: At least one mounting hole (101) is provided on the cover plate body (10), and the electrode assembly (30) is mounted in the mounting hole (101).

6. The battery cover according to claim 5, characterized in that: An explosion-proof hole (102) is provided on the cover plate body (10), and an explosion-proof valve (40) is installed in the explosion-proof hole (102).

7. The battery cover according to claim 6, characterized in that: A first annular reinforcement portion (12) is provided around the mounting hole (101); and / or, A second annular reinforcement portion (13) is provided around the explosion-proof hole (102).

8. The battery cover according to claim 1, characterized in that: The cover plate body (10) and the reinforcing rib (11) are integrally stamped and formed.

9. The battery cover according to any one of claims 1 to 8, characterized in that: The insulating member (20) is provided with a plurality of reinforcing structures, and the plurality of reinforcing structures and the plurality of reinforcing ribs (11) are arranged in a one-to-one corresponding manner.

10. A single cell, characterized in that: The invention comprises a shell, a battery cell and a battery cover as claimed in any one of claims 1 to 9, wherein the battery cell is arranged in the shell, and the battery cover is sealed and connected to the opening of the shell.

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