Patent ID: 8137832

Claim:
A spirally-wound non-aqueous electrolyte secondary battery, comprising: a stacked electrode assembly which includes a positive electrode including a cathode active material layer formed on at least one side of a positive electrode current collector, a negative electrode including an anode active material layer formed on at least one side of a negative electrode current collector, and a separator disposed between the positive electrode and the negative electrode, the positive electrode, the negative electrode, and the separator being spirally wound together, wherein the stacked electrode assembly has a first current collector facing region and a second current collector facing region disposed at a winding start end corresponding to a battery innermost end of the stacked electrode assembly and at a winding terminal end corresponding to a battery outermost end of the stacked electrode assembly, respectively, wherein a positive electrode current collector exposed portion in which the positive electrode current collector is exposed and a negative electrode current collector exposed portion in which the negative electrode current collector is exposed face each other through the separator in each of the first and second current collector facing regions, wherein at least one of the positive electrode current collector exposed portion or the negative electrode current collector exposed portion has a first insulating member formed thereon in the first current collector facing region at the winding start end, wherein at least one of the positive electrode current collector exposed portion or the negative electrode current collector exposed portion has a second insulating member formed thereon in the second current collector facing region at the winding terminal end, and wherein the second insulating member has a melting point lower than that of the first insulating member and wherein the first insulating member and the second insulating member each have a thickness of 10 μm to 100 μm.