| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device in which a first separator and a second separator can be prevented from being peeled.SOLUTION: In an electrode assembly 14, a first separator 24 covers one side of a positive electrode sheet 21 and has a first extension 51 larger than the positive electrode sheet 21, and partially extending from the side face 21e thereof, and a second separator 25 covers the other side of the positive electrode sheet 21 and has a second extension 52 larger than the positive electrode sheet 21, and partially extending in the same direction as the first extension 51. A separator 23 has a folded portion 26 formed by folding the first extension 51 toward the positive electrode sheet 21 so as to be laminated each other, and has first and second welded portions welded to the folded portion 26 in the lamination direction. |
