Patent ID: 6445567
Filing Date: 2002-09-03
Classification: H01G,Y02E,Y02T

Abstract:
A cap member for an electrical double layer capacitor which shields and caps an opening of a bottom-closed tubular container housing electrode elements of a positive electrode and a negative electrode impregnated with an electrolytic solution and oppositely placed via a separator and which has a pair of electrode terminals connected to each of the electrodes, said cap member comprising:a first electrode terminal which is in the form of a hollow tube and arranged in the outer peripheral side of the opening; a second electrode terminal which is arranged with a predetermined space in the inner peripheral side of the first electrode terminal; and an insulating seal member consisting of a resin-molded article including glass fibers of small pieces inserted and formed between both the electrode terminals; wherein the first electrode terminal has a rib projecting downward from its bottom surface and extending in the axial direction of the container and chemically bonds to an organic compound layer formed on the surface of the first terminal; the second electrode terminal has a rib projecting upwardly from its bottom surface and extending in the axial direction of the container and chemically bonds to an organic compound layer formed on the surface of the second terminal; the bottom surface of the rib of the second electrode terminal is positioned above the bottom surface of the rib of the first electrode terminal; and the resin-molded article contains therein the ribs formed on both the electrode terminals and chemically bonds to the organic compound layers formed on the surfaces of both the electrode terminals.