| 摘要 |
PROBLEM TO BE SOLVED: To provide a winding electrode that suppresses a short circuit of both electrode sheets even when an active material layer non-formation part is bent at the time of forming a power collection part.SOLUTION: In a winding electrode of the present invention, a power collection part 28 to which a part of or all of active material layer non-formation parts 26 and 36 that project and overlap is/are collected and relatively connected is separately formed in one end part and the other end part of a winding axial direction in a positive electrode sheet 20 and a negative electrode sheet 30 in a winding state. At least one of the positive electrode sheet and negative electrode sheet is formed so that a length of a width direction of the active material layer non-formation part constructing an outside part of the power collection part of the active material layer non-formation part relatively connected for constructing the power collection part in the sheet becomes larger than that of the width direction of the active material layer non-formation part constructing an inside of the power collection part from the outside part.SELECTED DRAWING: Figure 1 |
