Patent ID: 6696198
Filing Date: 2004-02-24
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A flat battery having a sealed power generation element comprising: a battery case that works as one electrode terminal; a sealing plate that works as a second electrode terminal and has a flat central section projecting outwardly and a flat peripheral section extending substantially parallel to the flat central section; and a gasket in a form of a film that insulates said case from said sealing plate,wherein an outer circumferential part of said peripheral section of said sealing plate is bent toward said flat central section, a bending angle of said outer circumferential part is in a range of 5 to 45 degrees relative to a horizontal plane, said gasket is composed of polyphenylene sulfide, a partly pressed part of said gasket is pressed at a rate of 10 to 50% of an original thickness of said gasket in a non-pressed state, and a thickness of said flat battery is not greater than 1.0 mm.