| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for using a pore forming agent and a complex pore forming process by using a binding agent made from synthetic resin which is excellent in binding force although having a poor film-forming ability, is resistant to sulfuric acid, and has appropriate oxidation resistance. SOLUTION: The Tig. is a process drawing for manufacturing positive and negative plates for use in a lead-acid batter. A polyvinylidene fluoride is dissolved in N-methylpyrolidone serving as a solvent (1). This solution and raw powders of an active material, such as lead powders, are kneaded together with the addition of lead sulfate (2). A paste formed thereby is applied to both sides of a core separately for positive and negative electrodes (3). The N-MP serving as the solvent is evaporated and dried (4), and is dipped in a 21wt.% sulfuric acid aqueous solution for five minutes (5). Next, it is aged in an atmosphere with 80 to 100% humidity at a 70 deg.C for one hour (6), and is dried in an atmosphere with 50% or less humidity at 80 deg.C or higher for two hours to obtain an unformed plate (7). The positive and negative plates are laid one on the other using separators and stored in a battery jar made from resin, and are charged for battery jar formation (8), thus completing the plates. |
