SECONDARY BATTERY AND METHOD FOR MANUFACTURING SECONDARY BATTERY

According to the present disclosure, a secondary battery capable of inhibiting precipitation of metallic lithium is provided. A secondary battery disclosed herein includes a wound electrode body, and a battery case. An insufficiently stacked region is formed in the vicinity of a positive electrode starting end portion in a flat portion of the electrode body. In the insufficiently stacked region, the total number of layers of a positive electrode plate and a negative electrode plate is smaller than in other regions in the flat portion. In addition, in the secondary battery, a protruding portion protruding toward at least a part of the insufficiently stacked region is formed on an inner surface of the battery case. As a result, it is possible to prevent pressing failure in the insufficiently stacked region and inhibit precipitation of metal Li due to a local increase in an inter-electrode distance.