| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device capable of suppressing precipitation of ions.SOLUTION: In a secondary battery 10, a separator 27 is formed by welding a pair of separator sheets 27a confronting each other. The separator 27 has a junction 27g joining the edges. A gap filling member 50 is a laminate of a plurality of sheet members 51, and has a welded portion 50a where all sheet members 51 are welded, and a body 50b surrounded by the welded portion 50a. In the laminating direction of an electrode assembly 14, the body 50b is facing the entire surface of an active material layer 23 of a positive electrode 21 via a negative electrode 24. |
