| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device capable of suppressing the occurrence of a fault in a separator in an electrode assembly in which a separator and an electrode sheet are layered.SOLUTION: A first separator 20a has a protruding part 30a protruding, among in-plane directions of a positive electrode sheet 18, in an extension direction of a positive electrode collector tab 24, and protruding parts 30b-30d protruding in other than the extension direction of the positive electrode collector tab 24, and a second separator 20b has a protruding part 30e protruding along the same direction as the protruding part 30a and protruding parts 30f-30h each protruding along the same direction as each of the protruding parts 30b-30d. A region width 35a of a first welding region 32 in which the protruding part 30a and the protruding part 30e are welded is larger than a region width 35b of a second welding region 33 in which each of the protruding parts 30b-30d and each of the protruding parts 30f-30h are welded, respectively. |
