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Colloidal electrolyte for lead-acid battery and preparation method thereof

A colloidal electrolyte, lead-acid battery technology, applied in lead-acid batteries, electrolyte immobilization/gelation, etc., can solve the problems of poor low-temperature discharge capacity, high electrolyte viscosity, short gel time, etc. Good stability and easy perfusion effect

Active Publication Date: 2018-03-20
GUANGDONG DYNAVOLT NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of silica, high electrolyte viscosity, short gel time, difficult filling, and poor low-temperature discharge ability

Method used

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  • Colloidal electrolyte for lead-acid battery and preparation method thereof
  • Colloidal electrolyte for lead-acid battery and preparation method thereof
  • Colloidal electrolyte for lead-acid battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Composition by weight percentage: sulfuric acid 40%, fumed silica 2.5%, silica sol with a weight concentration of 40% 1.25% (silica 0.5%), lithium oxide 0.3%, sodium hydroxide 0.7%, polyacrylamide 0.04%, sulfuric acid 0.4% stannous, 0.03% cerium sulfate, 0.5% potassium polyaspartate, and the balance is deionized water.

[0028] The preparation process of the electrolyte includes the following steps:

[0029] A: Preparation of fumed silica mother liquor: Add deionized water 5 times the weight of fumed silica into a stirred tank with a stirring and slitting function of speed greater than 3000 revolutions / min, and then add formula amount of sodium hydroxide and hydroxide Lithium, stir and dissolve, gradually add the formula amount of fumed silica, after adding all the fumed silica, continue to stir for 20 minutes, then add the formula amount of polyacrylamide, continue to stir for 20 minutes, to prepare the fumed silica mother liquor;

[0030] B: Preparation of dilute sulfuric a...

Embodiment 2

[0033] Composition by weight percentage: sulfuric acid 40%, fumed silica 1.5%, 40% silica sol 3.75% (silica 1.5%), lithium hydroxide 0.6%, sodium hydroxide 0.4%, polyacrylamide 0.03% , 0.3% stannous sulfate, 0.02% cerium sulfate, 0.6% potassium polyaspartate, and the balance is deionized water.

[0034] The preparation method is the same as in Example 1.

Embodiment 3

[0036] Composition by weight percentage: sulfuric acid 42%, fumed silica 1%, 40% silica sol 5% (silica 1.5%), lithium hydroxide 0.4%, sodium hydroxide 0.4%, polyacrylamide 0.02% , 0.5% stannous sulfate, 0.02% cerium sulfate, 0.7% potassium polyaspartate, and the balance is deionized water.

[0037] The preparation method is the same as in Example 1.

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Abstract

The invention discloses a colloidal electrolyte which is good in liquidity, easy to perfuse and capable of improving the high-current discharge performance of a battery at a low temperature and prolonging a cycle service life of the battery, and a preparation method for the colloidal electrolyte. The colloidal electrolyte comprises sulfuric acid, gas-phase silicon dioxide, silica sol, lithium hydroxide, sodium hydroxide, polyacrylamide, stannous mono-sulphate, cerous sulfate, sodium of plyaspartic acid or salt of sodium of plyaspartic acid, and the balance of deionized water, wherein the total content of silicon dioxide in a mixed solution is 2.8-3.2%. The preparation method comprises the following steps: firstly, preparing a gas-phase silicon dioxide mother liquid, secondly, preparing dilute sulphuric acid electrolyte, adding the gas-phase silicon dioxide mother liquid into the dilute sulphuric acid electrolyte, and thirdly, adding silica sol to obtain the colloidal electrolyte of a lead acid storage battery.

Description

Technical field [0001] The invention relates to a colloidal electrolyte used in a lead-acid battery and a preparation method thereof. Background technique [0002] Due to its advantages of long life, low water loss rate, and low self-discharge rate, gel batteries have gradually become a trendy new technology in the battery industry, and gradually replace traditional liquid battery technology. One of the most critical technologies for gel batteries is the gel electrolyte technology. The colloidal electrolyte currently used mainly includes fumed silica and silica sol. At present, silica sol is mostly used in China. The main reason is that the particles of fumed silica are small, only a few nanometers to tens of nanometers. Silica is compressed and packaged when leaving the factory. Small particles of fumed silica are agglomerated together. It is difficult to evenly disperse such small particles. Moreover, the prepared electrolyte has a high viscosity and poor fluidity. Increasing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/10
CPCH01M10/10H01M2300/0085Y02E60/10
Inventor 陈乐伍林伯连陈焕章
Owner GUANGDONG DYNAVOLT NEW ENERGY TECH CO LTD
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