Power storage cell manufacturing method and power storage cell

A method of manufacturing a power storage cell, the method comprising:

• a preparing step of preparing an electrode sheet including
• a current collecting foil having a shape elongated in one direction, and
• an active material layer provided on a surface of the current collecting foil;
• a cutting step of forming a plurality of cuts in the current collecting foil that are separated from each other in the one direction;
• and
• a winding step of winding the electrode sheet around a winding core, wherein
• the current collecting foil of the electrode sheet prepared in the preparing step includes an end region that is not provided with the active material layer, the end region includes an edge portion in an orthogonal direction orthogonal to both the one direction and a thickness direction of the current collecting foil, and the end region has a shape continuous in the one direction,
• in the cutting step, the plurality of cuts are formed in the end region such that a coupling portion is formed in the end region, the coupling portion including the edge portion in the orthogonal direction and extending in the one direction, and
• in the winding step, the electrode sheet is wound around the winding core to cause the coupling portion to be fractured along the cuts and the fracturing of the coupling portion forms connecting pieces in the end region, and the connecting pieces are leaned toward the winding core.