Patent ID: 7704633
Filing Date: 2010-04-27
Classification: H01B,H01M,Y02E,Y02P,Y10T

Abstract:
1. A polymer electrolyte battery comprising: a wound battery element including wherein the wound battery element has a first longitudinal surface, a second longitudinal surface opposite said first longitudinal surface, a first rounded lateral side, a second rounded lateral side opposite said first rounded lateral side, and a winding axis; and wherein a section of said first longitudinal surface of the wound battery element taken perpendicular to the winding axis has a curved portion between said first rounded lateral side and said second rounded lateral side, a section of said second longitudinal surface of the wound battery element taken perpendicular to the winding axis has a curved portion between said first rounded lateral side and said second rounded lateral side, and the curved portion of the first longitudinal surface is parallel to the curved portion of the second longitudinal surface.