| 摘要 |
PROBLEM TO BE SOLVED: To prevent without fail foreign matters from mixing into positive electrode sheets and/or negative electrode sheets included in an electrode body of a storage element.SOLUTION: An electrode body 5 is formed by overlapping and winding positive electrode sheets 11, negative electrode sheets 12, and separators 13. Each bent part 13c that is valley-folded against the positive electrode sheet 11 is provided at the separator 13 so as to wrap an end part 11a in a width direction of the positive electrode sheet 11 on an opposite side of the positive electrode lead 17. |
