Patent ID: 7317608

Claim:
An electric double layer capacitor, comprising: a separator; a pair of polarizing electrodes, disposed opposite to each other with the separator interposed therebetween; an electrolytic solution, impregnated in the pair of polarizing electrodes and the separator; an exterior cover and an exterior case, accommodating the separator, the pair of polarizing electrodes, and the electrolytic solution; and a gasket, disposed between the outer circumferential part of the exterior cover and the inner circumferential part of the exterior case, a storage space formed by the exterior case and the exterior cover being hermetically sealed by inwardly bending the opening tip portion of the exterior case; wherein no folded-back part is provided at the outer circumferential part of the exterior cover, and the gasket is polyether ether ketone, wherein the thickness of the exterior cover is larger than the thickness of the exterior case.