Colloidal electrolyte preparation technology

Abstract

The invention discloses a colloidal electrolyte preparation technology. The technology comprises the following steps: cooling a silica masterbatch dispersion and a sulfuric acid solution to 1-20DEG C, and mixing under the shearing of a shearing machine, wherein the silica masterbatch dispersion is prepared through the steps of adding deionized water to a dispersion kettle, sucking powdery nano-silica into the dispersion kettle through a high speed shearing pump, carrying out cyclic shearing to make the powdery silica uniformly dispersed in deionized water, adding a sodium hydroxide solution to the resulting dispersion under cyclic shearing conditions and adjusting the pH value of the dispersion to 7-11. A colloidal electrolyte produced in the invention can prolong the gelling time of the colloidal electrolyte, maintains the low viscosity of the colloidal electrolyte and benefits the perfusion of the colloidal electrolyte.

Description

technical field [0001] The invention belongs to the technical field of accumulators, and in particular relates to a colloidal electrolyte preparation process. Background technique [0002] The gel battery electrolyte uses the surface hydroxyl groups of silica to form a three-dimensional network structure under the bridging effect of sulfate radicals, thereby fixing the sulfuric acid electrolyte and changing it from a liquid state to a gel state. Colloidal electrolyte can effectively prevent stratification of sulfuric acid, so that the charge and discharge of lead-acid batteries are stable; the starting performance and deep discharge resistance performance are well improved; the growth of lead sulfate crystals is also inhibited, and the irreversible sulfate of the plate is reduced , prolonging the battery cycle life. [0003] Fumed silica has good thixotropy and gel strength, and is used as a gelling agent by large colloidal battery manufacturers at home and abroad. But it ...

AI Technical Summary

Problems solved by technology

But it is the strong thixotropy of fumed silica that makes the colloidal electrolyte high viscosity and short gelation time, which leads to the problem of difficulty in pouring the gel. In order to achieve the pouring effect, it is usually necessary to sacrifice the gel by reducing the silica content. Strength, to achieve lower viscosity, which is conducive to glue filling