ELECTRIC DOUBLE-LAYER CAPACITOR

PROBLEM TO BE SOLVED: To reduce degradation of a capacitor element. SOLUTION: A capacitor element 4 is housed, together with electrolyte in housing chambers 3 of a case 2; an opening part on the upper surface of the housing chamber 3 is sealed with a plate-like cover 5 for each housing chamber 3; a groove 6 or wall part is provided between adjoining housing chambers 3 on the upper surface of the case 2; thus, even if liquid leaks from a connection part between the housing chamber 3 and the cover 5 at its upper surface, entrance of the leaked electrolyte into the adjoining housing chambers 3 is prevented by the groove 6 or the wall part, since there exists the grove 6 or wall part between the adjoining housing chambers 3. As a result, the possibility of liquid-connection between the housing chambers 3, caused by liquid leakage is reduced and results in the reduced degradation of the capacitor element 4. Furthermore, since each of the housing chambers 3 is sealed independently with the plate-like cover 5, sealing performance is improved and the possibility of liquid leakage is reduced. COPYRIGHT: (C)2011,JPO&INPIT