Patent ID: 8218288

Claim:
A bipolar layered type electric double layer capacitor comprising: a multi-layered type body comprising a plurality of capacitor cells stacked on one another, and one or more polarization substrates each being interposed between the adjacent capacitor cells; two current collector metal end plates that are disposed on opposite surfaces of the multi-layered type body, respectively; two lamination-retaining metal plates between which the multi-layered type body and the two current collector metal end plates are interposed; packing members that seal the capacitor cells, the packing members having through-holes, respectively; tubular members that are each formed with a thread groove on an inner circumferential surface thereof, the tubular members being inserted into the through-holes of the packing members, each of the tubular members having opposite end portions into which fastening members are respectively screwed to fasten the lamination-retaining metal plates; and an insulating member that covers an outer surface of a tubular member, wherein the tubular members are made of a metal and the insulating member is a heat-shrinkable tube.