| 摘要 |
PURPOSE:To obtain a battery whose charge-discharge life is good and cost is low by maintaining ion conductive connection of one or both of positive and negative active materials and a separator by silicate colloids. CONSTITUTION:Assembly pressure of a separator and a plate is reduced to 0 (no pressure)-10kg/dm<2> from, for example, 20kg/dm<2> of conventional assembly pressure. Thereby, apparent pore size of a void 4 which is formed by contact of, for example, glass fiber constituting a separator 3 and a positive plate 1 or a negative plate 2 is increased than that of the separator. Silica fine powder in electrolyte preferntially enters the void 4 and ion conductive connection of the separator and active material is maintained by colloidal electrolyte in the void 4. The voids 4 are formed on almost all surface of the plate and silica fine powder penetrates easily to give the same effect as decreased pore size of the separator. Layer formation caused by falling down of sulfate through the separator is prevented. |
