BATTERY AND MANUFACTURING METHOD THEREFOR

Disclosed here is a battery including: an exterior body having a bottom wall; and a winding electrode body in which positive electrode, negative electrode and separator are wound about a winding axis. The winding electrode body has a flat shape having a pair of curvature parts having a curved outside surface and a flat part that connects the pair of curvature parts to each other and has a flat outside surface. When a line perpendicular to the winding axis of the winding electrode body and perpendicular to the bottom wall of the exterior body is assumed as L1, a portion positioned at an outermost periphery of the negative electrode in at least one of the pair of the curvature parts faces a portion positioned on a winding inner peripheral side of the negative electrode via the separator and not via the positive electrode on the line L1.