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Colloid power battery internal formation electrolyte and preparation method thereof

A power battery and electrolyte technology, which is applied in the field of colloidal power battery internalization into electrolyte and its preparation, can solve the problems of increased electrode corrosion speed, small electrochemical reaction area, and low battery life, and can slow down the short circuit of sulfate crystals, The effect of improving charge acceptance and strong charge acceptance

Inactive Publication Date: 2014-01-08
无锡华燕新电源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the colloidal electrolytes produced in China mainly use sulfuric acid and silica sol as the main raw materials. The colloidal electrolytes produced have poor dispersion, high thermal resistance, poor stability and poor thixotropy, small electrochemical reaction area, low conversion of lead dioxide, and thermal runaway. , The corrosion rate of the electrode increases, resulting in low battery life, poor low-temperature discharge performance, crystal short circuit, high self-discharge rate, increased internal resistance, decreased high-current discharge performance, fast self-discharge, decreased battery capacity, and shortened service life

Method used

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  • Colloid power battery internal formation electrolyte and preparation method thereof

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Embodiment 1

[0020] According to the mass fraction of nano-silica with a particle size of 7-40nm per ton of colloidal electrolyte, polypropylene with a molecular weight of 80,000-150,000, a concentration of 40% dilute sulfuric acid, deionized water, stannous sulfate and sodium sulfate are 2.9% in sequence , 0.1%, 42%, 53%, 1%, and 1% were sampled, and added to a 100L container after sampling, and stirred for 0.5h at a temperature of 15°C, a pressure of 0.35Kpa, and a stirring speed of 80rpm to obtain the colloidal electrolyte of the present invention . Example 2:

Embodiment 2

[0021] According to the mass fraction of nano-silica with a particle size of 7 to 40nm, polypropylene with a molecular weight of 80,000 to 150,000, a concentration of 44%, deionized water, stannous sulfate and sodium sulfate in each ton of colloidal electrolyte, they are 1% in order , 1%, 44%, 50%, 3% and 1% were sampled and added to a 100L container, and stirred for 1 hour at a temperature of 35°C, a pressure of 0.4Kpa, and a stirring speed of 100rpm to obtain the colloidal electrolyte of the present invention.

Embodiment 3

[0023] According to the mass fraction of nano-silica with a particle size of 7-40nm per ton of colloidal electrolyte, polypropylene with a molecular weight of 80,000-150,000, a concentration of 48%, dilute sulfuric acid, deionized water, stannous sulfate and sodium sulfate are 5.5% in sequence , 0.5%, 42%, 50%, 1% and 1% were sampled and added to a 100L container, and stirred for 1h at a temperature of 50°C, a pressure of 0.45Kpa, and a stirring speed of 120rpm to obtain the colloidal electrolyte of the present invention.

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Abstract

The invention discloses colloid power battery internal formation electrolyte which belongs to the field of batteries. The electrolyte consists of the following components in parts by weight: 1-20 parts of nano silicon dioxide, 0.1-5 parts of polypropylene, 40-50 parts of dilute sulphuric acid, 40-55 parts of deionized water, 1-5 parts of stannous mono-sulphate and 1-5 parts of sodium sulfate. The electrolyte solves the problems of low thixotropy, high heat resistance and high electrical resistance of colloid electrolyte made from general silica sol. A storage battery filled with the electrolyte disclosed by the invention is high in stability and thixotropy, low in internal resistance, low in self-discharge, high in charging acceptance capacity and high in low-temperature tolerance; the capacity of the battery is improved, and the cycle life of the battery is prolonged.

Description

Technical field: [0001] The invention relates to the field of battery electrolytes, in particular to an internalized electrolyte for a colloid power battery and a preparation method thereof. Background technique: [0002] Colloidal electrolyte has the advantages of immobility, not easy to leak acid, can prevent active material from falling off, reduce self-discharge, good low temperature resistance, prolong battery life, etc., and has obvious advantages in the application process. However, as far as gel batteries are concerned, the most critical technology is the formulation of gel electrolytes, and different formulations have a great impact on the performance of gel batteries. At present, the colloidal electrolytes produced in China mainly use sulfuric acid and silica sol as the main raw materials. The colloidal electrolytes produced have poor dispersion, high thermal resistance, poor stability and poor thixotropy, small electrochemical reaction area, low conversion of lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCY02E60/12H01M10/0565Y02E60/10
Inventor 何治堂史仲华路建良张婷储浩芳许虎城
Owner 无锡华燕新电源有限公司
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