Patent ID: 7604900

Claim:
A cylindrical alkaline storage battery, comprising: an electrically-conductive cylindrical outer can; and an electrode group accommodated in the outer can together with an alkaline aqueous solution as an alkaline electrolyte, the electrode group being formed by rolling up strip-shaped positive and negative electrodes with a separator inserted therebetween, wherein: the positive electrode includes a positive-electrode main part, and a positive-electrode terminal end part integrally formed to extend from one end of the positive-electrode main part and having a thickness smaller than a thickness of the positive-electrode main part, said positive-electrode terminal end part having an inner face thereof flush with an inner face of the positive-electrode main part and said positive-electrode terminal end part having an outer face that forms an inclined plane, wherein the inclined plane forms a boundary between the positive-electrode main part and the positive-electrode terminal end and a ridge is formed at the boundary between the positive-electrode main part and the positive-electrode terminal end, wherein the inner face of the positive-electrode terminal end part contacts the separator, and an insulating protective piece is interposed between the positive electrode and the separator extending along an outer face of the positive electrode to cover the boundary between the positive-electrode main part and the positive-electrode terminal end part.