Patent ID: 7417845
Filing Date: 2008-08-26
Classification: H01G,Y02E

Abstract:
1. An electric double-layer capacitor in which an electric double-layer capacitor body having a positive side electrode and a negative side electrode which are opposed to each other via a separator is put away in the interior of an enclosure made of a resin in a state where the electric double-layer capacitor body is impregnated with an electrolyte solution and a positive side terminal portion having a flat plate shape and a negative side terminal portion having a flat plate shape which are exposed to the exterior of the enclosure pass through a positive side opening and a negative side opening, respectively, formed on the enclosure and are connected to the positive side electrode and the negative side electrode, respectively, wherein the positive side terminal portion is welded to inner surfaces of the positive side opening over the entire periphery thereof, and the negative side terminal portion is welded to inner surfaces of the negative side opening over the entire periphery thereof, the positive side opening and the negative side opening formed on the enclosure are of a rectangular shape, positive side pressure application surfaces which are parallel to the inner surfaces of the rectangular positive side opening and apply a pressing force onto the positive side terminal portion inserted through the positive side opening are formed surrounding the entire periphery of the positive side opening, and negative side pressure application surfaces which are parallel to the inner surfaces of the rectangular negative side opening and apply a pressing force onto the negative side terminal portion inserted through the negative side opening are formed surrounding the entire periphery of the negative side opening.