Patent ID: 6137673
Filing Date: 2000-10-24
Classification: H01G,Y02E

Abstract:
An electric double-layer capacitor comprising:a plurality of electrode elements each having a current collector, a polarized electrode disposed on a surface thereof, and a strip-like current collecting lead extending from an end of said current collector, said electrode elements being stacked as alternately belonging to respective polarities, said current collecting leads of the electrode elements being stacked into lead assemblies of the respective polarities;a separator interposed between the stacked electrode elements; anda pair of electrode terminals, said lead assemblies being connected respectively to said electrode terminals;said lead assemblies of respective polarities serving as respective connectors connected to said electrode terminals;each of said connectors having a flat joint region as at least a portion thereof, said current collecting leads of each of said lead assemblies being integrally joined to each other by said flat joint region by ultrasonic welding before the connector is connected to said electrode terminal, said connectors being joined to said electrode terminals, respectively, through the respective joint region by electron beam welding or laser beam welding.