Power storage device

Abstract

To provide a technique capable of suitably enhancing the productivity of a power storage device.SOLUTION: In a battery 100 disclosed herein, a case body 12 includes a pair of opposed wide width surfaces 12a and a pair of opposed narrow width surfaces 12b continuous with the pair of wide width surfaces 12a. A recessed part 12a1 along a length direction of the case body 12 is present at an inner side of at least a surface of the pair of narrow width surfaces 12a and the pair of wide width surfaces 12b of the case body 12. In addition, the recessed part 12a1 has a raised weld mark 12c along the length direction of the case body 12, and the height of a raised portion of the welded mark 12c is lower than the depth of the recessed part 12a1.SELECTED DRAWING: Figure 5

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