| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical battery reduced in an occurrence ratio of internal short circuit. SOLUTION: This cylindrical battery is provided with an electrode group 5 produced by winding positive and negative electrodes 2 and 4 through a separator 3. In the battery, at least one of the positive and negative electrodes 2 and 4 has 3-10 kgf of tensile strength in the wound direction as a collector and includes a conductive substrate of a three-dimensional structure having 2-8% of elongation in the wound direction. |
