Patent ID: 6456484
Filing Date: 2002-09-24
Classification: H01G,Y02E

Abstract:
An electric double-layer capacitor having an electrode rolled body obtained by overlapping and winding a pair of electrode plates, which serve as positive and negative electrodes, and positive and negative collecting plates, which are mounted to upper and lower ends of the electrode rolled body through which charging is effected on the electrode plates and discharging is effected from the electrode plates,characterized in that at least the positive collecting plate of the collecting plates includes a plurality of convex ridges extending radially from central portions thereof and projecting toward the electrode rolled body, the plurality of convex ridges are pressed against the electrode rolled body to form bent portions on upper and lower ends of the electrode plates, the convex ridges are joined to the bent portions by welding, and openings or notches are each positioned between adjacent two of the bent portions formed by adjacent two of the convex ridges, respectively, to permit an electrolyte to be filled into the electrode rolled body through the openings or notches.