Type of cap for cylindrical lithium battery and new type of cylindrical lithium battery

Abstract

The present application provides a new type of cap for a cylindrical lithium battery, which includes a steel sheet, an explosion-proof sheet, a connection piece, a spacer ring and a seal ring. The steel sheet is defined with a through hole. The explosion-proof disc is arranged on one side of the steel sheet, and the explosion-proof disc is provided with a wrap edge, and the wrap edge is extended from an edge of the steel sheet to another side of the steel sheet and then to an edge of the through hole. The middle portion of the connection piece is in contact with the middle portion of the explosion-proof disc. The spacer ring is arranged between the explosion-proof disc and the connection piece. The seal ring is arranged around the explosion-proof disc, the connection piece and the spacer ring.

CPC Classifications