Colloidal electrolyte of lead acid storage battery, and preparation method for colloidal electrolyte

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

Active Publication Date: 2016-04-20
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 of lead acid storage battery, and preparation method for colloidal electrolyte
  • Colloidal electrolyte of lead acid storage battery, and preparation method for colloidal electrolyte
  • Colloidal electrolyte of lead acid storage battery, and preparation method for colloidal electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Composition by weight percentage: sulfuric acid 40%, fumed silica 2.5%, silica sol 1.25% (silica 0.5%) with a weight concentration of 40%, 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: Prepare fumed silica mother liquor: Add deionized water 5 times the weight of gas-phase dioxide to a stirring tank with a stirring and cutting function whose rotation speed is greater than 3000 rpm, and then add the prescribed amount of sodium hydroxide and hydroxide Lithium, after stirring and dissolving, gradually add the fumed silica in the formula quantity, continue stirring for 20 minutes after adding all the fumed silica, then add the polyacrylamide in the formula quantity, continue stirring for 20 minutes, and prepare the fumed silica mother liquor;

[00...

Embodiment 2

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

[0034] Preparation method is identical with embodiment 1.

Embodiment 3

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

[0037] Preparation method is identical with embodiment 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 storage battery and a preparation method thereof. Background technique [0002] Due to its long life, low water loss rate, low self-discharge rate and other advantages, gel batteries have gradually become a trendy new technology in the battery industry and gradually replaced traditional liquid battery technology. One of the most critical technologies of gel batteries is gel electrolyte technology. The colloidal electrolytes currently used mainly include 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, and the gas phase Silica is compressed and packaged when it leaves the factory, and the small particles of fumed silica are agglomerated together. It is difficult to disperse such small particles evenly, and the prepared electrolyte has a high viscosi...

Claims

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Application Information

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Patent Type & Authority Applications(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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