| 摘要 |
PROBLEM TO BE SOLVED: To quickly disperse the gas, which is generated from an electrode plate at the time of forming a battery jar, out of an electrode plate group through ventilation pores so as to promote a contact with the electrolyte, and to improve the forming efficiency by forming a collector for lead-acid battery, which is made of lead or lead alloy, into the porous structure having ventilation pores. SOLUTION: A polyurethane foaming material as a base material is filled with gypsum, and thereafter, the resin is eliminated by burning, and the lead is cast in the vacuum, and thereafter, the gypsum is eliminated by washing so as to obtain a lead sheet of porosity at about 90%, which has ventilation pores. This sheet is formed into a grid-like collector for lead-acid battery. This collector is coated for filling with the paste obtained by kneading the lead powder, which is composed of lead and lead oxide, and dilute sulfuric acid, and aging and drying are performed so as to obtain a positive electrode plate for lead-acid battery. An electrode group, which is formed by assembling the positive electrode plate and a negative electrode plate and a retainer, is assembled in a battery jar, and formation processing is performed by carrying current. The gas generated from the electrode plate at this stage is quickly dispersed out of the electrode plate group through the pores of the collector so as to prevent the reduction of contact area of the active material and the electrolyte due to the stay of the gas. |
