Process for producing sealed lead-acid battery

Abstract

A plate group is formed of positive and negative plates and separators formed mostly of glass fibers of a diameter not thicker than 1.0 micron and is inserted into a container. Then, a sulfuric acid electrolyte of a concentration of a viscosity increasing agent of 0 to 3.0% by weight is first poured in an amount smaller than the total pore volume of the plate group and a sulfuric acid electrolyte of a concentration of the viscosity increasing agent higher than in the above poured sulfuric acid electrolyte is then poured in so that the total poured amount may be the same as or larger than the total pore volume of the plate group. The sealed lead-acid battery obtained as mentioned above has an excellent discharge characteristic and gas recombining performance, is low in the internal resistance, is long in the service life and does not leak the electrolyte.

Dependencies are inferred from the claim text.