| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device capable of suppressing positional displacement of an electrode assembly along a winding axial direction and suppressing bending of a bent portion.SOLUTION: A secondary battery 10 includes an electrode assembly 12. The electrode assembly 12 is configured to have a flat shape when viewed from the extension direction of a winding axial line L, and has bent portions 12c at both ends in the longitudinal direction of the electrode assembly 12 when viewed from the extending direction of the winding axial line L. The electrode assembly 12 is configured by laminating a first separator 23, a negative electrode 24, a second separator 26, and a positive electrode 25. In the first separator 23 and the second separator 26, starting end portions 23a, 26a located on the winding starting side to a core material 30 are fixed to the core material 30.SELECTED DRAWING: Figure 3 |
