| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage element capable of improving uniformity of stress that an electrode body receives from a container.SOLUTION: A power storage element 10 includes an electrode body 400 formed by a positive electrode, a negative electrode, and a separator, being wound around a winding axis. The electrode body 400 includes a core member 410b disposed inside the innermost circumference of the wound positive electrode, negative electrode, and separator. The core member 410b is formed of a material whose rigidity is lower at an end part in a longer direction in a cross-section vertical to the winding axis than a center part.SELECTED DRAWING: Figure 8 |
