Patent ID: 7697265

Claim:
An electric double layer capacitor, comprising: an electrode body comprising a separator formed between a pair of electrodes; an electrolyte; a concave-shaped container for containing the electrode body and the electrolyte; and a sealing plate for sealing an opening part of the container, the sealing plate having a plate shape comprising an upper surface, a lower surface and side surfaces, wherein the sealing plate is made of a metal, wherein a first external connection terminal and a second external connection terminal are formed on an external side surface of the container, wherein the container includes a level difference part on an internal surface of the container, and wherein the first external connection terminal is extended to the level difference part, and wherein the side surfaces of the sealing plate are bonded, via a metal layer, to the inside of the container and a first part of an undersurface of the sealing plate is bonded, via the metal layer to the level difference part and a second part of the undersurface of the sealing plate is configured to contact a current collector formed on one of the pair of electrodes.