| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device that has superior steam barrier properties and also can have an edge part folded back at a predetermined position without causing microcracking.SOLUTION: There is provided a power storage device 100 including a sealed vessel body 110 formed of an exterior material 1 for power storage device, and a power storage member 112 housed in the vessel body 110 while having a part of a tab 114 exposed to the outside. The vessel body 110 has the exterior material 1 for power storage device formed in a vessel shape having one side narrowed deep with a sealant layer in, and is sealed by heat-sealing a tip edge part 118 and a side edge part 120, and a thin part 122 in a shape of a recessed streak is formed at the side edge part 120. |
