| 摘要 |
PURPOSE:To prevent liquid leakage by allocating a resin-made cylinder along the inner circumference of a positive electrode casing. CONSTITUTION:The uppermost edge of a positive electrode casing 1 is folded inward to seal the opening and, at the same time, a resin-made cylinder 7 comprising nylon or its derivatives is allocated along the inner side of the positive electrode casing 1. Then, the inner surface of the cylinder 7 is made to abut against at least one part of the positive electrode black mix and that of a resin-made opening-sealing ring 6. By this, a route along which an electrolyte leaks becomes longer and, and the same time, adherence is improved greatly between the positive electrode casing 1 and the nylon-made cylinder 7. In such a way, liquid leakage can be prevented. |
