Patent ID: 7335440
Filing Date: 2008-02-26
Classification: H01M,Y02E

Abstract:
1. A coiled electrode for an electrochemical cell, comprising: a first segment of electrode material forming an outer winding of the coiled electrode, the first segment being of a first thickness between an outside surface and an inside surface and having first and second ends; a second segment of electrode material forming inner windings of the coiled electrode, the second segment being of a second thickness between an outside surface and an inside surface that is greater than the first thickness and having first and second ends; and a solid current collector of a conductive material overlaying the outside surface of both the first segment and the second segment of electrode material and dimensioned to be coextensive with the outer winding of the coiled electrode, the collector being directly connected to the second segment; wherein the first segment is joined directly to the second segment proximate one end of the first segment and proximate one end of the second segment, wherein the joined ends of the first and second electrode material segments overlap to form an overlapping region, a reinforcing member coupled to the overlapping region, wherein the reinforcing member comprises an alkali metal.