Electrolyte for long-life colloid storage battery, and preparation method thereof

The invention provides an electrolyte for a long-life colloid storage battery. The electrolyte is prepared from, by mass, 4 to 6.5 percent of fumed silica, 35 to 45 percent of a sulfuric acid solution, 0.5 to 1 percent of an anhydrous sodium sulfate, potassium sulfate and lithium sulfate mixture, 0.5 to 1.5 percent of phosphoric acid, 0.05 to 0.15 percent of polyvinyl alcohol, 0.05 to 0.15 percent of glycerol, 0.05 to 0.15 percent of stannous mono-sulphate and pure water. The electrolyte has the advantages that the prepared gel electrolyte is high in crosslinking degree and good in stability, meanwhile, the gel electrolyte has high thixotropy and rheological property, and compared with a common gel battery, a battery prepared from the gel electrolyte is low in self-discharge, high in high and low temperature resistance, high in capacity and excellent in deep cycle performance. 本发明提供了一种长寿命胶体蓄电池用电解液，所述电解液由质量分数为4％～6.5％的气相二氧化硅，35％～45％的硫酸溶液，0.5％～1％的无水硫酸钠、硫酸钾、硫酸锂混合物，0.5％～1.5％的磷酸，0.05％～0.15％的聚乙烯醇，0.05％～0.15％的甘油，0.05