PURPOSE: To prevent the occurrence of overflowing at times of injection of dilute sulfuric acid and chemical conversion treatment of a battery jar as well as to make the extent of initial capacity improvable, by assembling a porous separator in compression without doing ordinary aging and drying after filling up a grid with crude paste, while injecting the dilute sulfuric acid in the state that moisture in the paste is more than the specified quantity, and performing the chemical conversion treatment of the battery jar.
CONSTITUTION: Lead carbonate or basic lead carbonate, etc., are formed in an uncovered plate during aging and drying, and carbonic acid gas is generated as reacting to dilute sulfuric acid, but if moisture of paste is made into a state of more than 5wt% without doing aging and drying, generation of this gas is lessened. And, if red lead or lead dioxide is mixed much in crude paste in advance, it is sufficiently and favorably convertible even if chemical conversion treatment of a battery jar takes place in the state that more than 5wt% of moisture is contained, and furthermore charging efficiency in a positive plate comes so better so that the quantity of electricity required for the chemical conversion treatment of the battery jar is reducible. If the charging efficiency is good enough, an electrolytic loss of water due to overcharging during chemical conversion becomes lessened, so that an injected electrolyte quantity is reducible, thus overflowing at injection and battery jar conversion processes is preventable.
TSUBOTA MASAATSU
HATANAKA TERUHIRO
