ELECTROCHEMICAL CELL STRUCTURE EMPLOYING ELECTRODE SUPPORT FOR THE SEAL

摘要

An electrochemical cell is disclosed having a cylindrical can (112) having an open end and a closed end, and a first electrode (115) having a generally hollow cylindrical shape moulded in place within the can such that an outer cylindrical surface (152) of the first electrode contacts an inner cylindrical surface of the can (113). The first electrode has a recess (160) adjacent to the inner cylindrical surface of the can at an end of the first electrode proximate the open end of the can to accommodate any flashing (159) that is formed along the interior side walls of the can when the first electrode is moulded in place. The electrochemical cell further includes a second electrode (120) having a polarity opposite the first electrode disposed within a hollow cavity of the first electrode, a separator (117) lining the hollow cavity within the first electrode so as to physically separate the first and second electrodes, and a collector assembly (125) supported by the first electrode for sealing the open end of the can. As an alternative to providing a recess in the first electrode, a flat annular ring (270) made of electrochemically active material may be provided between the flat upper surface (256) of the first electrode and the bottom surface (139) of the collector assembly.