Patent ID: 7566515

Claim:
A flat non-aqueous electrolyte secondary cell comprising a metallic anode case also serving as an anode terminal and a metallic cathode case also serving as a cathode terminal fit to each other via an insulating gasket, the anode or cathode case having an opening-sealed structure caulked by caulking and having in the inside thereof an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte, wherein a sheet-shape cathode is wrapped with a separator except for in a part contacting at inner face of cathode case, a sheet-shape anode is settled on the above sheet-shape cathode at right angles each other, and they are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of said insulating gasket.