Gel battery electrolyte and preparation method therefor

Abstract

The invention discloses a gel battery electrolyte. The gel battery electrolyte comprises the ingredients in percentage by mass: 4-8% of silicon dioxide, 0.6-2% of anhydrous sodium sulfate, 0.2-0.8% of phosphoric acid, 21.5-38.4% of sulfuric acid and the balance of water. The invention also discloses a preparation method for the gel battery electrolyte, wherein the preparation method comprises the steps of (1) mixing silicon dioxide with water, and preparing a gel mother liquid under a high-speed shearing effect; (2) preparing a dilute sulfuric acid solution, and adding anhydrous sodium sulfate and phosphoric acid to obtain a mixed solution; and (3) adding the obtained gel mother liquid into the mixed solution, and rapidly stirring to obtain the gel battery electrolyte. Due to the synergetic cooperation and the reasonable adding sequence of the materials with the proportion, the prepared electrolyte is capable of effectively eliminating hydration layering, long in cycle life and excellent in charging-discharging performance at a low temperature environment; and meanwhile, the electrolyte system is stable, low in cost, and good in the operational performance.

Description

technical field [0001] The invention relates to a lead-acid battery electrolyte and a preparation method thereof, in particular to a gel battery electrolyte and a preparation method thereof. Background technique [0002] The traditional AGM battery has the following defects: (1) The acid content in the separator is low, and the water loss is large during use, which is easy to cause thermal runaway, which causes a single battery to bulge, and eventually leads to the scrapping of the entire battery pack. (2) The low temperature performance is poor, the low temperature charge and discharge internal resistance is large, the charge acceptance is poor, and the discharge capacity is low. (3) The service life of the deep cycle is short. The acid content of the AGM battery is less than that of the colloidal battery. After the battery is used for a period of time, the water in the AGM battery disappears, resulting in an increase in the acid density and accelerating the corrosion rate ...

AI Technical Summary

Problems solved by technology

[0002] The traditional AGM battery has the following defects: (1) The acid content in the separator is low, and the water loss is large during use, which is easy to cause thermal runaway, causing a single battery to bulge, and eventually leading to the scrapping of the entire battery pack

(2) Poor low temperature performance, large internal resistance for low temperature charge and discharge, poor charge acceptance, and low discharge capacity

(3) The service life of the deep cycle is short. The acid content of the AGM battery is less than that of the colloidal battery. After the battery is used for a period of time, the water in the AGM battery disappears, resulting in an increase in the acid density and accelerating the corrosion rate of the plate grid. However, shortening battery life

(4) The stratification of the electrolyte often occurs, and the plate forms sulfate, which makes it difficult to charge and discharge the battery, and eventually leads to the end of the battery life

However, the colloidal electrolyte prepared purely by ordinary mechanical stirring method is prone to insufficient dissolution of various components, resulting in uneven electrolyte, waste of raw materials, poor colloidal stability, and prone to stratification. It is difficult to control the consistency of the battery made of liquid, and it is difficult for each component to fully play its role in the battery

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