Patent ID: 7678498
Filing Date: 2010-03-16
Classification: H01M,Y02E,Y02P

Abstract:
1. A nonaqueous electrolyte secondary battery comprising: a battery can container which houses a wound electrode body formed by winding a belt-shaped anode and cathode, and isolated by a separator together with an electrolytic solution; an anode terminal fixed to the battery can container through a gasket; and a safety valve incorporated between the anode terminal and the wound electrode body, wherein the safety cover is formed with an annular-shaped protrusion for housing the disk holder therein, and the protrusion has a disconnection preventing portion for preventing disconnection of the disk holder, wherein the safety valve includes: an annular-shaped safety cover; an annular-shaped stripper disk; and an annular-shaped disk holder which houses the annular-shaped stripper disk in the annular-shaped safety cover, the annular-shaped stripper disk and the annular-shaped safety cover being fixed and integrated.