Patent ID: 6051337
Filing Date: 2000-04-18
Classification: H01M,Y02E,Y10T

Abstract:
A galvanic cell comprising:a) a first electrode having a polarity;b) a second electrode of opposite polarity;c) a separator between said first electrode and said second electrode;d) an electrolyte;e) a two-part conductive housing containing said first electrode, second electrode, separator and electrolyte, the first part of said housing being a can having an upstanding wall with an edge defining an opening and being electrically connected to said first electrode, and the second part of said housing being a cup having a peripheral flange and being electrically connected to said second electrode;f) an insulating member comprising a base segment, an internal upstanding wall defining an opening in the base segment, and a peripheral wall; wherein the peripheral wall, internal wall and base segment define an internal surface area that contacts said second electrode, the peripheral wall of the insulating member is disposed between the upstanding wall of the can and the flange of the cup, and the edge of the can is sealed against said insulating member thereby securing the can to said insulating member to provide a seal for the cell; andg) a current collector member extending through the opening in the base segment of said insulating member and electrically contacting said second electrode at one end and electrically contacting the cup at the other end; said current collector having a surface area disposed within said second electrode of less than 25% of said insulating member's internal surface area.