ELECTRIC DOUBLE LAYER CAPACITOR

摘要

PURPOSE: To obtain an electric double layer capacitor excellent in sealing performance for sealing a a metal case with a seal composed of a first seal member made of a material having a high heat resistance and second seal member made of a material having a high moisture resistance. CONSTITUTION: A separator 12 is disposed between a pair of polarized electrodes 11a and 11b and impregnated with an electrolytic liq. These electrodes are housed in a dish-like metal case 13 acting as a collector and the opening of the case is sealed with a metal cover 15 i.e., the collector through a seal 14 composed of a seal member 14a made of an engineering plastic material having a high heat resistance and seal member 14b made of a butyl rubber having a high moisture resistance. Thus, an electric double layer capacitor excellent in sealing performance.