Patent ID: 6844110
Filing Date: 2005-01-18
Classification: H01M,Y02E,Y02P

Abstract:
1. A lithium secondary cell, comprising: an internal electrode body including a hollow cylindrical winding core, a positive electrode plate and a negative electrode plate wound around an external peripheral wall of the hollow cylindrical winding core, a separator disposed between the positive and negative electrode plates, and a nonaqueous electrolyte solution impregnating the internal electrode body; a cylindrical cell case opened at both ends and housing the internal electrode body; electrode caps sealing the internal electrode body inside of the cell case at both open ends of the cell case, each of the electrode caps being provided with a plate member, and at least one of the electrode caps has a pressure release hole in a position corresponding with the central axis of the winding core; an external terminal member protruding onto the surface of the electrode caps to lead current outside of the cell, the entirety of the external terminal member being shielded from or not in contact with the interior of the cell case; and an internal terminal member directly contacting the external terminal member and brought into connection with the internal electrode body and taking current from the internal electrode body, the entirety of the internal terminal being shielded from or not in contact with the exterior of the cell case, wherein at least two members selected from the group consisting of the plate member, the external terminal member and the internal terminal member are joined together for construction.