Patent ID: 7541110
Filing Date: 2009-06-02
Classification: H01M,Y02E,Y02P

Abstract:
1. A secondary battery comprising: a can for receiving an electrolyte and an electrode assembly, the electrode assembly including a first electrode plate, a second electrode plate and a separator between the first electrode plate and the second electrode plate in a jelly roll configuration; a cap assembly including a cap plate covering an upper portion of the can and an electrode terminal connected to one of the first electrode plate and the second electrode plate within a center portion of the cap plate; an electrode lead wire connected to an upper surface of the electrode terminal to connect the electrode terminal to an external terminal; and a washer on an upper surface of the cap assembly to insulate the cap plate from the electrode lead wire, the washer including a hole through which the electrode terminal protrudes and an exposure part for exposing a portion of the cap plate.