Patent ID: 8062786
Filing Date: 2011-11-22
Classification: H01M,Y02E

Abstract:
1. A cylindrical secondary battery constructed in a structure in which a crimping region, at which a cap assembly is mounted to the open upper end of a cylindrical container having an electrode assembly mounted therein, is formed at the upper end of the container, wherein the crimping region is constructed in a structure in which the upper end of the crimping region is gently bent at a radius of curvature (R), having a value of 0.3 to 2 mm, such that the crimping region surrounds a gasket located at the inside of the crimping region, the bent front end extends inward, such that the bent end presses the gasket, and an inclination of an angle, which is 1 to 8 degrees from the side of the container, is formed at the sidewall of the crimping region, such that the upper part of the crimping region is directed inward.