Patent ID: 6887620

Claim:
A battery cell, comprising: a negative electrode having a first physical area defined by a first perimeter; a positive electrode having a second physical area defined by a second perimeter, substantially similar to the first perimeter; a separator interposed between the negative and positive electrodes and extending beyond the perimeters of the positive and negative electrodes, wherein the separator is flat and has a porous structure for absorbing and containing electrolyte within the cell; a first electrically conductive lamination comprising a first inner metal layer and a first polymeric outer layer, the first inner metal layer making electrical contact with the negative electrode, the first polymeric outer layer having a perimeter larger than the first perimeter; a second electrical conductive lamination comprising a second inner metal layer and a second polymeric outer layer, the second inner metal layer making electrical contact with the positive electrode, the second polymeric outer layer having a perimeter larger than the second perimeter; wherein the first and second polymeric outer layers are sealed to each other along their perimeters forming a plastic to plastic joint and sealing therein the negative electrode, the positive electrode, and the separator.