Patent ID: 9196427
Filing Date: 2015-11-24
Classification: H01G,H01M,Y02E,Y02P

Abstract:
1. A winding-type electric storage device comprising: a flat electrode assembly including a core; and a case in which the electrode assembly is housed, the core including: the electrode assembly including, on the outer circumference thereof, substantially plane sections respectively corresponding to the opposed sections of the core, the substantially plane sections being in proximity to or contact with an inner surface of the case, wherein each of the first and second curved sections is at least in part composed of a material stacked into two or more plies, an outer ply of the plies comprising: wherein the outer ply is curved in a circular arc shape over a distance from the first end to the second end of a curved section of the first and second curved sections, the free end is located at a position in proximity to a boundary between the curved section and the opposed section, and the outer ply is elastically deformed so as to generate a repulsive force exerted outward from a center of the circular arc shape.