Patent ID: 7927732

Claim:
An electrochemical device, comprising: a spirally wound electrochemical assembly having a sidewall and upper and lower faces, said electrochemical assembly comprising: a terminal for making a connection external to the device; a separator interposed between a positive electrode comprising a positive current collector having a layer of positive electroactive material deposited thereon, the current collector having uncoated edge portions, and a negative electrode comprising a negative current collector having a layer of negative electroactive material deposited thereon, the current collector having uncoated edge portions, wherein the uncoated edge portions of the positive and negative electrodes are on opposite faces of the spirally wound assembly; a plurality of conductive tabs in electrical contact with the uncoated portions of at least one of the positive and negative current collectors and extending outward from the current collector, wherein the tabs of the at least one of the positive and negative current collectors are spaced apart from one another such that the conductive tabs are located within a predetermined region of the face of the spiral winding so that during assembly the tabs extending from one of the at least one of the positive and negative current collectors intersect when folded towards the center of the spirally wound face, and fold into a second opposing region of the face of the spiral winding; and a foldable terminal extension that secures the tabs from the one of the at least one of the positive and negative current collectors to form an electrical connection with the terminal, such that the foldable terminal extension and the tabs that are secured by the terminal extension lie flat with respect to the spiral winding.