To provide a capacitor which reduces internal resistance and causes no outside leakage of an electrolyte.
The capacitor is provided with a metal case 12a which accommodates a capacitor element 11 and the driving electrolyte, a terminal 15a for external connection provided on the outer surface of the case 12a, a sealing plate 13a for sealing an opening of the case 12a, and a terminal 15b for external connection provided on the outer surface of the sealing plate 13a. In the capacitor, a port 17 for charging the driving electrolyte is arranged at the sealing plate 13a, and a gas permeable sheet member and a block are provided at the port 17. Further, the gas permeable sheet member and the block are covered and fixed by a metal cap having a hole for external communication, and a pressure control valve 18 is arranged which is constantly energized in the direction in which the block is constantly closed.
WATANABE YOSHIHIRO
Tomoyasu Sakaguchi
Hiroki Naito
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