Patent ID: 8110309

Claim:
A secondary battery comprising: a positive electrode plate with a positive electrode active material layer formed on a surface of a positive electrode collector, a negative electrode plate with a negative electrode active material layer formed on a surface of a negative electrode collector, a separator that is interposed between the positive electrode plate and the negative electrode plate, and insulating tape that is affixed to a cut end portion, including an active material layer portion, of either the positive electrode plate, or the negative electrode plates, or both; the positive electrode plate, the negative electrode plate, and the separator being stacked or rolled alternately into an electrode group that is sealed, together with electrolyte, inside a battery case, the insulating tape being constituted of adhesive insulating tape that has an adhesive application area where adhesive has been applied and a nonadhesive application area where adhesive has not been applied, and the insulating tape being affixed so that the nonadhesive application area is positioned centrally on the active material layer of the electrode plate to which the insulating tape is affixed, and moreover so that a part of the adhesive application area is positioned on the active material layer at the cut end portion side.