Patent ID: 10873060

Abstract:
The present invention relates to a battery can, in particular for a rechargeable lithium-ion battery, configured to receive an electrode assembly formed by winding an anode and a cathode that are isolated by a separator, wherein the battery can is configured to be closed by cap assembly. The battery can comprises a cylindrical can body for containing the electrode assembly and has a first end forming a base and a peripheral side wall extending from the base in a longitudinal direction to a second end of the can body comprising an opening, wherein the side wall of the can body ends in an end edge at the second end, and wherein the side wall of the can body is adapted to be crimped inwardly at the second end of the second end to attach a cap assembly that is inserted into the can body opening to the can body. According to the invention, the end edge of the peripheral side wall is formed in an inwardly extending loop into an annular shoulder surrounding the opening. The annular shoulder is configured such that when the can body sidewall is crimped inwardly at the second end to attach a cap assembly positioned in the can body opening to the battery can, the annular shoulder is bent inwardly such that the annular shoulder faces and engages the cap assembly positioned in the second end of the can body and such that the end edge of the side wall faces the inner side wall of the can body.