| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery with excellent performance.SOLUTION: A secondary battery comprises: a wound electrode body; and a conductive member. A positive electrode, a negative electrode and a separator are wound in the wound electrode body. The positive electrode has: a positive electrode core; and a positive electrode mixture layer arranged on the positive electrode core. The negative electrode has: a negative electrode core; and a negative electrode mixture layer arranged on the negative electrode core. The separator is arranged between the positive electrode mixture layer and the negative electrode mixture layer. The outermost peripheral portion of the negative electrode mixture layer is located farther on the outer peripheral side of the wound electrode body than the outermost peripheral portion of the positive electrode mixture layer. The conductive member is arranged even farther on the outer peripheral side of the wound electrode body than the outermost peripheral portion of the negative electrode mixture layer. The conductive member is wound one or more turns in the wound electrode body.SELECTED DRAWING: Figure 3 |
