Patent ID: 7482090

Claim:
A nonaqueous electrolyte secondary battery, comprising: a case; a negative electrode provided in the case and including a negative electrode current collector formed of aluminum or an aluminum alloy, and a negative electrode active material layer that is formed on the negative electrode current collector and has a Li absorption-release potential nobler by at least 0.4V than a lithium electrode potential, and a projecting portion formed on one side of the negative electrode current collector, formed of aluminum or an aluminum alloy, and including first and second sections, said first section disposed between the second section and the negative electrode active material layer; a negative electrode terminal connected to the second section of the projecting portion of the negative electrode current collector, the negative electrode active material layer is not formed in the projecting portion; a positive electrode including a positive electrode active material layer that absorbs and releases Li element or Li ions and is positioned to face the negative electrode active material layer and the first section of the projecting portion of the negative electrode current collector; a separator provided between the positive electrode active material layer and the negative electrode active material layer, and between the positive electrode active material layer and the first section of the projecting portion of the negative electrode current collector; a stress imparting member which imparts a tensile stress or a shearing stress to the first section of the projecting portion of the negative electrode current collector; and a nonaqueous electrolyte provided in the case.