| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical cell of high reliability and high performance which does not cause an internal short circuit by a gelatinous negative electrode. SOLUTION: In the cylindrical cell which has a bottomed cylindrical separator between a positive electrode mixture and the gelatinous negative electrode, and which has an insulating gasket so as to contact an opening part of the bottomed cylindrical separator, and which is composed by inserting and caulk-sealing a sealing material provided with a safety valve at the opening part, the cylindrical cell of the high reliability and the high performance can be provided in which because the opening part of the bottomed cylindrical separator is contracted in the inner circumferential direction and hardness of the opening part is made high, it is prevented that the gelatinous negative electrode overflows out of the opening part of the bottomed cylindrical separator and causes the cell internal short-circuit, and in which because the planar insulating gasket without a taper can be used, the cell lifetime is not damaged. COPYRIGHT: (C)2006,JPO&NCIPI |
