Patent ID: 8580439
Filing Date: 2013-11-12
Classification: H01M,Y02E,Y02P

Abstract:
1. An electrochemical cell, comprising: a) a casing; b) an electrode assembly housed inside the casing, the electrode assembly comprising: c) a stack holder surrounding at least a portion of the electrode assembly, the stack holder comprising an interior surface spaced apart from an exterior surface by a thickness having a perimeter edge, wherein at least one of the interior and exterior stack holder surfaces supports at least one protrusion comprising an extension portion extending outwardly from the at least one of the interior and exterior surfaces to an apex providing a force contacting surface that is in direct physical contact with at least one of the anode faces and the cathode faces of the electrode assembly or with the separator contacting the anode or the cathode, d) wherein an imaginary longitudinal axis intersecting an imaginary plane of the interior or exterior surface of the stack holder and extending to the apex of the protrusion intersects the at least one face of the anode and the cathode substantially at a normal orientation therewith to thereby provide a compressive force to ensure the anode and the cathode maintain a close physical proximity to each other.