| 摘要 |
PURPOSE:To obtain a lead storage battery with little self-discharge, excellent in a supercharge shelf characteristics and further having a characteristic of durability. CONSTITUTION:For filling up a gel-like electrolyte in pores of the positive plate it is hard to fill up the already gelatinized electrolyte so that a method of gelatinizing in the pores of the positive plate is desirable. The positive plate here to be used can be an unformed or formed plate. From the viewpoint of maintenance, however, a spot-formed plate is desirable. Said positive plate is dried and impregnated with a liquid wherein SiO2 is dispersed and SiO2 particles are fillted up in the pores of the positive plate. When the concentration of SiO2 in dispersion liquid is too high, expansion in the formed plate at the time of gel formation is big so as to cause partial destruction of the plate, while when the concentration is too weak, a full quantity of gel-like electrolyte does not generate so as to have no effect thus a solid portion of SiO2 in the dispersion liquid is desirably 5-30wt%. The positve plate impregnated with the dispersion liquid of SiO2 as it is or after drying is combined with the negative plate and a liquid- containing material to constitute a group of plates and to be put into a battery jar, then a water solution of sulphuric acid i.e. the electrolyte is injected. |
