Anti-explosion valve texture structure of secondary lithium battery top cover

Abstract

The invention provides an explosion-proof valve texture structure of a secondary lithium battery top cover. The texture structure comprises a top cover plate and an insulating support, an explosion-proof valve vent hole is formed in the middle of the top cover plate, an explosion-proof valve supporting step is arranged on the outer edge of the bottom of the explosion-proof valve vent hole, a concave groove is formed in the inner side of the explosion-proof valve supporting step, the surface of the concave groove is provided with uniformly distributed texture grooves, uniformly distributed first injection molding via holes are arranged among the texture grooves, an explosion-proof valve is installed in the explosion-proof valve vent hole, the explosion-proof valve is uniformly provided with second injection molding via holes along the circumferential direction, and the insulating support is connected with the bottom of the top cover plate through a positioning column. According to the invention, the texture grooves are formed in the concave groove of the explosion-proof valve vent hole, the contact area of a pouring surface is increased through the uniformly distributed texture grooves, meanwhile, the sealing performance of pouring forming is also improved, the sealing effect of a cover plate assembly is improved, and thus the performance of a battery is improved.

Description

technical field [0001] The invention relates to the technical field of the top cover of the secondary lithium battery, in particular to an anti-explosion valve scratch structure of the top cover of the secondary lithium battery. Background technique [0002] In the top cover plate assembly of the secondary lithium battery, the explosion-proof valve has an outstanding safety protection function. The explosion-proof valve is formed into a positioning part by injection molding, and an explosion-proof valve protective cover is installed at the bottom of the explosion-proof valve to protect the explosion-proof valve. During the injection molding process of the fixing parts on the explosion-proof valve, the flat structure of the traditional injection molding surface makes the injection molding sealing effect not good, and the connection stability is poor. In order to solve these problems, we propose an explosion-proof valve bite on the top cover of the secondary lithium battery fl...

AI Technical Summary

Problems solved by technology

[0003] The explosion-proof valve bite structure of the top cover of the secondary lithium battery proposed by the present invention solves the problem that the injection molding surface of the explosion-proof valve of the existing cover assembly is flat and the sealing effect is not good, and the connection stability is poor.

Images