Colloidal electrolyte and preparation method thereof

Abstract

The invention relates to an electrolyte for a lead-acid accumulator, in particular to a colloidal electrolyte and a preparation method thereof. The invention adopts the following technical scheme that the colloidal electrolyte is prepared from the following components in percentage by weight: 0.3 to 1.0 percent of silicon dioxide, 0.05 to 0.25 percent of cobaltous sulphate, 0.5 to 1.0 percent of sodium sulphide, 0.05 to 0.5 percent of stannous sulfate, 92 to 95 percent of dilute sulphuric acid of which the density is 1.330 to 1.400g / cm<3> and the balance of water of which the pH value is 7 to 9.

Description

technical field [0001] The invention relates to an electrolyte used in a lead-acid storage battery, in particular to a colloidal electrolyte used in a lead-acid storage battery. Background technique [0002] At present, the common batteries used in the prior art are still mainly lead-acid batteries. The electrolyte of lead-acid batteries is prepared from dilute sulfuric acid and deionized water. The preparation method is relatively simple and the cost is low. Therefore, this battery Still widely used in all walks of life. [0003] For example, a high-conductivity sodium salt electrolyte disclosed in Chinese Patent No. 200710090477.3 is made of the following components by weight: sodium silicate and / or sodium fluorosilicate, 1.95~2.20% by weight; cobalt sulfate And / or zinc sulfate, 0.0012~0.0062‰ by weight; sodium phosphate and / or slightly calcium acid, 0.0051~0.014‰ by weight; density 1.260~1.400g / cm 3 dilute sulfuric acid, 90.80~91.30% by weight; inhibitor, 0.0035~0.024...

AI Technical Summary

Problems solved by technology

[0003] For example, a high-conductivity sodium salt electrolyte disclosed in Chinese Patent No. 200710090477.3 is made of the following components by weight: sodium silicate and / or sodium fluorosilicate, 1.95~2.20% by weight; cobalt sulfate And / or zinc sulfate, 0.0012~0.0062‰ by weight; sodium phosphate and / or slightly calcium acid, 0.0051~0.014‰ by weight; density 1.260~1.400g / cm 3 dilute sulfuric acid, 90.80~91.30% by weight; inhibitor, 0.0035~0.024‰ weight; hydrogen inhibitor, 0.0015~0.0085‰ weight; deionized water, balance; cobalt sulfate in the preparation material of this kind of high conductivity sodium salt electrolyte And / or the weight part of zinc sulfate is too little, cause the internal resistance of this kind of electrolyte is still high; And its weight part of sodium silicate and / or sodium fluorosilicate is too much, further exacerbates the internal resistance of this electrolyte, causes electrolytic Poor performance, low over-discharge resistance

[0004] Another example is the colloidal electrolyte battery disclosed in the invention patent of China Patent No. 03126151.5. The electrolyte used in it consists of 3%-7.5% by weight of silica sol, 36% -41% by weight of sulfuric acid, 0.5%-2.5% by weight of phosphoric acid, 1%-4% by weight of cobalt sulfate, 1%-5% by weight of propionic acid alcohol and water are uniformly mixed, and the cobalt ion The content is higher than the cobalt ion content disclosed in the aforementioned patent, but the weight part of its silica sol is more than the weight part of sodium silicate and / or sodium fluorosilicate disclosed in the aforementioned patent. Therefore, this kind of electrolyte still cannot effectively reduce the electrolyte internal resistance to improve conductivity, and its over-discharge resistance is still low