| 摘要 |
PURPOSE:To make the charge/discharge capacity stable constantly regardless of procedure of cycles and secure the reliability of a battery by setting the size of a positive pole plate and a negative pole plate of wound pole plates as predetermined. CONSTITUTION:A negative pole plate 3 consists of metal lithium, and it is wound facing a positive pole plate 1 through a separator 2. A width X of the positive pole plate 1 is smaller than a width Y of the negative pole plate, and a phase difference Z for both end parts A of the width of the positive pole plate 1 and the width of the negative pole plate 3 is set to be at least more than twice a thickness T of the positive pole plate. An end part C of the positive pole plate 3 protrude from an end part D of the positive pole plate 1 at the center of the group of pole plates for a phase difference W, and W is at least more than 2T. An end part E of the negative pole plate 3 protrude from an end part F of the positive pole plate 1 for a phase difference V, and V is at least more than 2T. In this constitution, consumption of the negative pole 3 at the end parts and production of dendrite lithium can be restricted. |
