Patent ID: 7718310

Claim:
An electrochemical cell, which comprises: a) a terminal pin; b) a first electrode strip comprising a first current collector having a right current collector portion and a left current collector portion extending in opposite directions from an intermediate current collector portion, the right and left current collector portions being contacted by an electrode active material to thereby form a right first electrode portion and a left first electrode portion with the intermediate current collector portion being left uncovered and secured to the terminal pin; c) a first separator comprising a lower first separator portion covering a lower surface of the first electrode strip and an upper first separator portion covering an upper surface of the first electrode strip, wherein the intermediate current collector portion is at least partially perforated with the lower first separator portion being secured to the upper first separator portion through the perforations in the intermediate current collector portion; d) a second, counter electrode comprising a right second electrode strip and a left second electrode strip, each of the second electrode strips comprising a counter electrode active material contacted to a second current collector, wherein the right second electrode strip is disposed in an overlapping relationship with the right first electrode portion, one on top of the other, and the left second electrode strip is disposed in an overlapping relationship with the left first electrode portion, one on top of the other, with the lower first separator portion secured to the upper first separator portion through the perforations in the intermediate current collector portion physically segregating the first electrode from direct contact with the second electrode, wherein the first and second electrodes are characterized as having been wound into an electrode assembly with the terminal pin serving as the terminal for the first electrode strip; e) a casing housing the electrode assembly and serving as a counter terminal for the second electrode electrically insulated from the first electrode; and f) an electrolyte activating the first and second electrodes housed in the casing.