| 摘要 |
A battery (100) includes a flat wound electrode body (10) that is obtained by winding a first electrode sheet (20) and a second electrode sheet (30) in a flat shape via separator sheets (40a, 40b). The first electrode sheet (20) is disposed in the flat wound electrode body (10) so as to be wound on the outer peripheral side with respect to the second electrode sheet (30). The first electrode sheet (20) is wound so as to enfold a winding end portion (38) of the second electrode sheet (30). A winding end portion (28) of the first electrode sheet (20) is disposed so as to pass either of the straight portions (12a, 12b) or rounded portions (14a, 14b) where the winding end portion (38) of the second electrode sheet (30) is disposed and reach the next straight portion (12a, 12b) or pass through the next straight portion. |
