| 摘要 |
PROBLEM TO BE SOLVED: To reduce the amount of use of an electrode while suppressing looseness of an electrode body in a battery case, and also to suppress the amount of material for forming an electrode body.SOLUTION: In a positive electrode metal plate 24A, a region NS in which a positive electrode active material 24B is not coated, and a region TS in which the positive electrode active material 24B is coated and the length in the vertical direction is shorter than that of the region NS exist. In a negative electrode metal plate 26A, a region NF in which a negative electrode active material 26B is not coated and a region TF in which the negative electrode active material 26B is coated and the length in the vertical direction is shorter than that of the region NF exist. In an electrode body 23, the region TS and the region TF are oppositely wound and the region NS and the region NF are oppositely wound. |
