Patent ID: 7271994

Claim:
An electrical energy storage device, which comprises: a) an enclosure comprising a casing portion comprising a casing face wall supporting a surrounding sidewall extending to a first peripheral edge, and a cover comprising a cover outer surface spaced from a cover inner face wall by a second peripheral edge, wherein the casing portion is closed by the cover with the first peripheral edge secured to the second peripheral edge; b) a first active material in electrical contact with at least one of the casing face wall and the cover inner face wall; c) a second active material as a shaped body of an opposite polarity as the first active material, wherein the shaped body comprises spaced apart first and second body face walls joined by an intermediate body end wall and wherein a first portion of the body end wall adjacent to the casing face wall is substantially normal to a plane of the first body face wall with a second portion of the body end wall meeting the second body face wall being inwardly contoured adjacent to where the first peripheral edge of the casing portion is secured to the second peripheral edge of the cover; d) a separator intermediate the first and second active materials; e) a glass-to-metal seal supported in at least one of the casing portion and the cover to electrically insulate a lead for the second active material from the enclosure serving as a terminal for the first active material; and f) a working electrolyte provided in the enclosure in contact with the first and second active materials.