Patent ID: 8062780
Filing Date: 2011-11-22
Classification: H01G,H01M,Y02E,Y02P,Y10T

Abstract:
1. A film-covered electric device comprising: an electric device element which internally accumulates electric energy and is capable of generating a gas through a chemical reaction or a physical reaction; casing films each including a thermo-fusing resin layer, for surrounding said electric device element such that said thermo-fusing resin layers oppose each other along the periphery of said electric device element to seal said electric device element by a thermally fused region formed by thermally fusing said thermo-fusing resin layers opposing along the periphery to each other around the overall periphery of said electric device element; a gas guide portion including a hollow portion independent of a space in which said electric device element is received, for leading the gas to a position spaced away from said electric device element, said gas guide portion communicating with external air; and a pressure release portion formed in part of said thermally fused region by connecting the space in which said electric device element is received to said hollow portion, for peeling off in preference to another region of said thermally fused region to allow the gas to pass therethrough, wherein said gas guide portion comprises a gas release chamber formed in said thermally fused region as part of the hollow portion, and a tube which is opened at both ends, sandwiched by said casing films and connected to said gas release chamber.