| 摘要 |
The invention allows a positive electrode plate and a negative electrode plate of a power generating element of a battery to function as effectively as possible. In the battery including the power generating element formed by winding the foil-shaped positive electrode plate 23a and the foil-shaped negative electrode plate 23b, on which active material layers are formed respectively, about a winding core 21, with separators 24a and 24b sandwiched therebetween, and forming the plates into a flat shape, the winding core 21 is formed by a porous member and the foil-shaped positive electrode plate 23a and the foil-shaped negative electrode plate 23b are disposed so that faces of the plates, on which the active material layers are formed, face each other with the winding core 21 interposed therebetween at an innermost layer of the winding. |
