| 主权项 |
1. A method of manufacturing a non-aqueous electrolyte secondary battery that is equipped with a wound electrode body that is formed by laminating a positive electrode, which has positive electrode active material layers provided on both faces of a positive electrode current collector thereof respectively, and a negative electrode, which has negative electrode active material layers provided on both faces of a negative electrode current collector thereof respectively, on each other via a separator, and winding a lamination of the positive electrode, the negative electrode, and the separator, the method comprising:
preparing the wound electrode body in which an uncoated portion where the positive electrode active material layers are not formed is laminated in a state of protruding from the negative electrode at one of both ends of the wound electrode body in a direction of a winding axis thereof, an uncoated portion where the negative electrode active material layers are not formed is laminated in a state of protruding from the positive electrode at the other of both the ends of the wound electrode body in the direction of the winding axis thereof, and the positive electrode active material layers are not formed on at least a surface of the positive electrode current collector on a winding outer peripheral side thereof in a region that includes at least an outermost periphery of the positive electrode; structuring the secondary battery by accommodating the wound electrode body as well as a non-aqueous electrolyte in a battery case; and subjecting the secondary battery to an aging treatment in which the secondary battery is retained within a temperature range that is equal to or higher than 60° C., wherein the prepared wound electrode body is configured such that the positive electrode active material layers are not formed on both faces of the positive electrode current collector in the region that includes at least the outermost periphery of the positive electrode. |
