Lead-acid batteries are widely used in electric vehicles due to their high open circuit voltage, low cost, reliable use, good high-current discharge performance, abundant raw materials, and high lead recovery rate. The batteries currently used in pure electric vehicles are mainly lead-acid batteries. The disadvantages of lead-acid batteries are serious pollution and low mass specific energy and volume specific energy. Ectreosorce Company, German Sunshine Company, American Arias Company, American BPC Company and Swedish OPTLMA Company are all conducting research on automotive lead-acid power batteries and have made good progress through their respective technologies.