The nonaqueous electrolyte battery according to the second embodiment will be more specifically described with reference to the drawings. FIG. 1 is a cross-sectional view of a flat-shaped nonaqueous electrolyte battery. FIG. 2 is an enlarged sectional view of a portion A of FIG. 2. Each drawing is a pattern diagram to facilitate an understanding of the embodiments. The shape, size, and ratio thereof are different from those of an actual device. However, they can be appropriately designed and modified by taking into consideration the following description and known techniques.
A flat-shaped wound electrode group 1 is housed in a bag-shaped case 2 formed of a laminate film in which a metal layer is interposed between two resin layers. As shown in FIG. 2, the flat-shaped wound electrode group 1 is formed by spirally winding a laminate obtained by stacking a negative electrode 3, a separator 4, a positive electrode 5, and the separator 4 in this order from the outside and subjecting it to press-molding.
