Patent ID: 7482094
Filing Date: 2009-01-27
Classification: H01M,Y10T

Abstract:
1. A separator subassembly for a coiled electrode-type electrochemical cell having an anode and a cathode, comprising: an elongated separator layer; and means for protecting against a short circuit condition between the anode and the cathode as a material that forms the anode becomes depleted during cell discharge including a spacer layer joined to a portion of the elongated separator layer at a location along the length of the separator layer so that when an anode subassembly is enveloped within the elongated separator layer, the spacer layer aligns with and overlaps a surface-mounted anode current collector of the anode subassembly, and wherein the spacer layer covers a single side of the anode subassembly and leaves an inner end of the anode subassembly exposed.