Patent ID: 7995328
Filing Date: 2011-08-09
Classification: H01G,Y02E,Y02T

Abstract:
1. A capacitor comprising: an element having a pair of positive and negative electrodes, each comprising a collector made of a metallic foil having a carbon-containing electrode layer formed thereon except for one side of edges, the electrodes arranged in orientations opposite to each other and rolled up with a separator interposed therebetween in a configuration that bare portions where the carbon-containing electrode layer is not formed along the edges of the positive and negative electrodes protrude from edges of the separator at the opposite sides with respect to each other and form a pair of electrode terminations; a cylindrically shaped closed-bottom metal casing containing the element together with an active electrolyte, the metal casing having an inner bottom surface bonded to one of the electrode terminations of the element; and a terminal plate having an inner surface bonded to the other electrode termination of the element and sealing an opening of the metal casing, wherein length of the bare portion not provided with the carbon-containing electrode layer on one side of the element bonded to the inner bottom surface of the metal casing is set different from length of the bare portion not provided with the carbon-containing electrode layer on the other side bonded to the inner surface of the terminal plate.