Square battery cover plate structure

Abstract

The utility model belongs to the technical field of lithium ion batteries, and discloses a square battery cover plate structure which comprises a cover plate body, a positive pole and a negative pole, the positive pole and the negative pole are integrally punched on the cover plate body, a circle of positive insulation nanometer injection molding area penetrating through the whole cover plate body is arranged between the periphery of the positive pole and the cover plate body, and a circle of negative insulation nanometer injection molding area penetrating through the whole cover plate body is arranged between the periphery of the negative pole and the cover plate body. And a circle of negative insulating nano injection molding area penetrating through the whole cover plate body is arranged between the periphery of the negative pole and the cover plate body. The positive pole and the negative pole are integrally punched on the cover plate body, and compared with a traditional pole riveting top cover and a traditional pole welding top cover, a sealing ring, upper plastic, a riveting block or a welding ring and other structures are omitted, the failure risk caused by excessive connection between original parts is reduced, the failure probability risk of the pole is reduced, and the service life of the cover plate is prolonged. The overall mechanical strength of the pole is improved, and the risk probability of failure of the failed pole is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium - ion batteries, and particularly relates to a square battery cover plate structure. Background Art

[0002] Lithium - ion batteries are widely used in the fields of power and energy storage. However, at present, the structures of many square battery cover plates are complex, with a large number of components for connection, resulting in a large number of interfaces between components and a high failure probability, which poses a great challenge to the safety and reliability of lithium - ion batteries during long - term use. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a square battery cover plate structure to solve the above - mentioned problems existing in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A square battery cover plate structure includes a cover plate body, a positive electrode post and a negative electrode post integrally stamped on the cover plate body. A positive - electrode insulating nano - injection - molding area penetrating the entire cover plate body is arranged between the periphery of the positive electrode post and the cover plate body, and a negative - electrode insulating nano - injection - molding area penetrating the entire cover plate body is arranged between the periphery of the negative electrode post and the cover plate body.

[0006] As a preferred technical solution in the utility model, the positive - electrode insulating nano - injection - molding area is made of plastic.

[0007] As a preferred technical solution in the utility model, the negative - electrode insulating nano - injection - molding area is made of plastic.

[0008] As a preferred technical solution in the utility model, an explosion - proof valve is integrally stamped or welded and connected on the cover plate body.

[0009] As a preferred technical solution in the utility model, a lower plastic is connected to the lower end of the cover plate body by ultrasonic hot melting.

[0010] Beneficial effects: The positive electrode terminal and the negative electrode terminal of the present utility model are integrally stamped on the cover body. Compared with the traditional terminal riveted top cover and terminal welded top cover, structures such as sealing rings, upper plastics, riveting blocks or welding rings are reduced, the failure risk caused by excessive connections between the original components is reduced, the failure probability risk of the terminal is reduced, the overall mechanical strength of the terminal is improved, and the risk probability of failure of the failed terminal is reduced. At the same time, a positive electrode insulating nano-injection molding area penetrating the entire cover body is provided between the periphery of the positive electrode terminal and the cover body, and a negative electrode insulating nano-injection molding area penetrating the entire cover body is provided between the periphery of the negative electrode terminal and the cover body, ensuring the insulation performance between the positive electrode insulating nano-injection molding area and the negative electrode insulating nano-injection molding area and the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model.

[0012] In the figure: 1 - cover body; 2 - positive electrode terminal; 3 - negative electrode terminal; 4 - positive electrode insulating nano-injection molding area; 5 - negative electrode insulating nano-injection molding area; 6 - explosion-proof valve; 7 - lower plastics. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the present utility model in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model.

[0014] Embodiment:

[0015] As Figure 1 shown, this embodiment provides a square battery cover structure, including a cover body 1 and a positive electrode terminal 2 and a negative electrode terminal 3 integrally stamped on the cover body 1. Compared with the traditional terminal riveted top cover and terminal welded top cover, structures such as sealing rings, upper plastics, riveting blocks or welding rings are reduced, the failure risk caused by excessive connections between the original components is reduced, the failure probability risk of the terminal is reduced, the overall mechanical strength of the terminal is improved, and the risk probability of failure of the failed terminal is reduced. A positive electrode insulating nano-injection molding area 4 penetrating the entire cover body 1 is provided between the periphery of the positive electrode terminal 2 and the cover body 1, and a negative electrode insulating nano-injection molding area 5 penetrating the entire cover body 1 is provided between the periphery of the negative electrode terminal 3 and the cover body 1, ensuring the insulation performance between the positive electrode insulating nano-injection molding area 4 and the negative electrode insulating nano-injection molding area 5 and the cover body 1.

[0016] It should be noted that in practice, the insulating nano-injection molding area can also be insert injection molding and secondary injection molding. The metal connection between the cover plate and the pole column can be made into a plastic connection, and it can be adjusted according to the actual situation. This embodiment does not make specific restrictions.

[0017] In the present utility model, the positive pole column 2 and the negative pole column 3 are integrally stamped on the cover plate body 1. Compared with the traditional pole column riveted top cover and pole column welded top cover, structures such as sealing rings, upper plastics, riveting blocks or welding rings are reduced, the failure risk caused by excessive connection between the original components is reduced, the failure probability risk of the pole column is reduced, the overall mechanical strength of the pole column is improved, and the risk probability of failure of the failed pole column is reduced. At the same time, a positive insulating nano-injection molding area 4 penetrating the entire cover plate body 1 is provided between the periphery of the positive pole column 2 and the cover plate body 1, and a negative insulating nano-injection molding area 5 penetrating the entire cover plate body 1 is provided between the periphery of the negative pole column 3 and the cover plate body 1 to ensure the insulation performance between the positive insulating nano-injection molding area 4 and the negative insulating nano-injection molding area 5 and the cover plate body 1.

[0018] As a preferred implementation in this embodiment, it should be further noted that the positive insulating nano-injection molding area 4 is made of plastic, and thus the metal connection between the cover plate body 1 and the positive insulating nano-injection molding area 4 in the prior art is made into a plastic connection to ensure the insulation performance between the positive insulating nano-injection molding area 4 and the cover plate body 1.

[0019] As a preferred implementation in this embodiment, it should be further noted that the negative insulating nano-injection molding area 5 is made of plastic, and thus the metal connection between the cover plate body 1 and the negative insulating nano-injection molding area 5 in the prior art is made into a plastic connection to ensure the insulation performance between the negative insulating nano-injection molding area 5 and the cover plate body 1.

[0020] As a preferred implementation in this embodiment, it should be further noted that an explosion-proof valve 6 is integrally stamped or welded on the cover plate body 1. Both connection methods can improve the matching strength of the explosion-proof valve 6 on the cover plate body 1, reduce the failure probability between structures, and relatively improve the safety and reliability of the lithium battery.

[0021] As a preferred implementation in this embodiment, it should be further noted that a lower plastic 7 is connected to the lower end of the cover plate body 1 by ultrasonic hot melting. Both connection methods can improve the matching strength of the lower plastic 7 on the cover plate body 1, reduce the failure probability between structures, and relatively improve the safety and reliability of the lithium battery.

[0022] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A square battery cover structure, characterized in that: The invention comprises a cover plate body (1) and a positive pole column (2) and a negative pole column (3) integrally stamped on the cover plate body (1); a circle of positive electrode insulating nano-molding regions (4) penetrating the entire cover plate body (1) is arranged between the periphery of the positive pole column (2) and the cover plate body (1); and a circle of negative electrode insulating nano-molding regions (5) penetrating the entire cover plate body (1) is arranged between the periphery of the negative pole column (3) and the cover plate body (1).

2. A square battery cover structure according to claim 1, characterized in that: The positive electrode insulating nano-injection molding area (4) is made of plastic.

3. A square battery cover structure according to claim 1, characterized in that: The negative electrode insulating nano-injection molding region (5) is made of plastic.

4. A square battery cover structure according to claim 1, characterized in that: The cover plate body (1) is integrally stamped with or welded with an explosion-proof valve (6).

5. A square battery cover structure according to claim 1, characterized in that: The lower end of the cover plate body (1) is connected to the lower plastic (7) by ultrasonic hot melting.

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