Sealing nut used for power battery

Abstract

The invention discloses a sealing nut used for a power battery. The sealing nut comprises a sealed outer shell, a fixed clamping base and a sealing head assembly. The fixed clamping base is arranged at the bottom part of the sealed outer shell and is used for connecting a battery cell. The sealing head assembly is arranged inside the sealed outer shell, and slides up and down in the sealed outer shell. One end of the sealing head assembly is elastically connected with the fixed clamping base. When the sealing head assembly slides to a highest point, the other end of the sealing head assembly penetrates a through hole in the top part of the sealed outer shell, and is used for sealing a liquid injection port of the battery cell. When the sealing head assembly slides to a lowest point, the sealing head assembly is arranged inside the sealed outer shell, and is used for opening the liquid injection port of the battery cell. Thus, the problem of deterioration in sealing performance becausescrew threads of a sealing column are worn by screwing / unscrewing the nut repeatedly for many times is solved, the processes of screwing / unscrewing the nut in working procedures such as liquid injection, formation and encapsulation of steel balls are reduced, the operation efficiency can be improved, the cost can be reduced, automatic sealing is realized, and the instability brought by manual operation is reduced.

Description

technical field [0001] The invention belongs to the technical field of power battery structure, and in particular relates to a sealing nut for a power battery. Background technique [0002] The production process of the existing aluminum case power battery includes multiple processes such as assembly, liquid injection, formation, and packaging of steel balls. The upper and lower ends are sealed. This manual assembly of nuts for sealing increases the time for internal leakage of the product and affects production efficiency. After multiple processes, it is necessary to repeat the installation and disassembly of the nuts many times, which is easy to cause damage to the nuts. The thread of the sealing column is worn, which leads to the problem of reduced sealing performance. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a sealing nut for a power battery. [0004] Technical scheme ...

AI Technical Summary

Problems solved by technology

[0002] The production process of the existing aluminum case power battery includes multiple processes such as assembly, liquid injection, formation, and packaging of steel balls. The upper and lower ends are sealed. This manual assembly of nuts for sealing increases the time for internal leakage of the product and affects production efficiency. After multiple processes, it is necessary to repeat the installation and disassembly of the nuts many times, which is easy to cause damage to the nuts. The thread of the sealing column is worn, which leads to the problem of decreased sealing performance

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