Top cover assembly, manufacturing method, battery and battery module

Abstract

The invention relates to the field of power batteries of new energy vehicles, and discloses a top cover assembly, a manufacturing method, a battery and a battery module. The top cover assembly comprises a top cover and a pole. The pole and the top cover are connected in a sealed mode through an insulator. One end of the insulator penetrates through the top cover, one end of the pole penetrates through the insulator, and the insulator is welded to the top cover and the pole in a sealed mode. According to the top cover assembly provided by the invention, the sealing connection between the pole and the top cover is realized through the insulator. The top cover assembly has good sealing performance, simple structure, and few parts, so that insulation sealing between the pole and the top coveris realized. Connection and sealing can be realized without metallization of a sealing member, the insulator is strong in environmental adaptability and good in mechanical performance, the state of the battery during breathing is not changed all the time, the safety performance of the battery is improved, the cost is reduced, the state of the insulator is not changed in a long-term use state, andthe effective service life is up to more than 15 years.

Description

technical field [0001] The invention relates to the field of power batteries of new energy vehicles, in particular to a top cover assembly, a manufacturing method, a battery and a battery module. Background technique [0002] As people pay more and more attention to the environment, new energy vehicles have developed rapidly. As the core power component of new energy vehicles, the development of power batteries will inevitably affect the progress of new energy vehicles, especially the sealing of the top cover of power batteries is the root of the safety of power batteries, which affects the use of batteries. overall performance. [0003] In the prior art, a plastic sealing ring is pressed and sealed between the pole and the top cover, and the plastic material is positioned to realize sealing and insulation, which has the problems of complex structure, many parts, high cost, and poor high and low temperature impact performance; The upper and lower sides of the insulator can...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, a plastic sealing ring is pressed and sealed between the pole and the top cover, and the plastic material is positioned to realize sealing and insulation, which has the problems of complex structure, many parts, high cost, and poor high and low temperature impact performance; The upper and lower sides of the insulator can also be metallized between the post and the top cover, and then welded to the pole and the connecting piece, and finally the whole assembly is welded to the top cover, the structure is complex and the cost is high

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