| 摘要 |
PURPOSE:To increase capacity of a cell and improve its reliability, by interposing a soft sealing film between a negative electrode side reinforcing film and cellophane and eliminating the generation of an internal short-circuit. CONSTITUTION:An annular soft ceiling 3e consisting of fluorine resin is interposed between cellophane 3a and a negative electrode side reinforcing film 3b, and held by a gasket 6 and a positive electrode active material 2. If the film 3e is interposed to be held between the gasket 6 and the active material 2, air gaps 3d of the reinforcing film 3b are blocked by the gasket 6 from the side of a negative electrode can 5 while the soft film 3e from the side of the cellophane 3a, and a liquid path is not generated between internal and external sides of a compressed part, then an internal short-circuit can be prevented. Further as fluorine resin of strong water repellent quality is used as the soft film, even if a gap is generated sometimes in an intermediate part, the liquid path is not generated by the water repellent quality, and the internal short- circuit can be more perfectly prevented. |
