Nanometer-level high composite electrolyte and its preparing method

A composite electrolyte and nano-scale technology, applied in the field of electrolyte, can solve the problems of sealed lead-acid batteries such as thermal runaway, large water loss, and weak high-current discharge performance, so as to reduce the risk of battery failure, uniform and balanced heat conduction, Improves the effect of stability and uniformity

Active Publication Date: 2009-04-29
深圳理士电源发展有限公司
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Problems solved by technology

However, this kind of electrolyte has the problems of hydration (water is precipitated from the colloid) and large cracks during use and storage, and because the silicate particles are large, the dispersibility is poor, and there is a certain sensitivity to temperature. Small capacitive results in large water loss, uneven conduction, weak high-current discharge performance, poor battery cycle ability, and easy to cause thermal runaway problems in sealed lead-acid batteries

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  • Nanometer-level high composite electrolyte and its preparing method
  • Nanometer-level high composite electrolyte and its preparing method

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Embodiment Construction

[0013] The nano-level high-composite electrolyte of the invention is colloid, and its components include silicon-containing nano-level materials, dilute sulfuric acid, additives and pure water. In this embodiment, the silicon-containing nanoscale material is nanoscale highly dispersed SiO 2 , the particle size of the particles is about 50-500nm, which can use the nano-scale SiO of the prior art 2 , the nanoscale SiO 2 Particles are made by existing diffusion methods. The density range of dilute sulfuric acid is 1.370~1.420g / cm 3 , within this density range, the other components of the electrolyte have better dispersibility, thus facilitating the preparation of the electrolyte. The additives are mainly used to improve the stability and uniformity of the colloid, prevent hydration (water is separated from the glue) and produce continuous cracks, and only produce small cross cracks to achieve the maximum recombination of gas in the sealed battery. The additives used are mainly...

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Abstract

The invention relates to a nanometer high compound electrolytic solution which comprises: dilute sulphuric acid, pure water and nanometer high scattering SiO2 (by weight rate): dilute sulphuric acid:pure water:nanometer high scattering SiO2=1:2:16. The grain size of the nanometer high scattering SiO2 particle is 50-500nm. The preparing method comprises the following steps: 1) mixing the nanometer high scattering SiO2 and the pure water by weight rate, cooling it, wherein the temperature of the mixing course is 60-80 DEG C; 2) adding the dilute sulphuric acid into the cooled solution and stirring with high speed until stirring evenly.

Description

【Technical field】 [0001] The invention relates to an electrolyte solution for a sealed lead-acid battery. 【Background technique】 [0002] Electrolytes are widely used in sealed lead-acid batteries for cycling, standby, traction, power or starting. The electrolyte of these sealed lead-acid batteries generally includes dilute sulfuric acid and silicate, and the colloidal electrolyte is obtained after stirring, standing still, solidification, emulsification, and aging for a certain period of time. However, this kind of electrolyte has the problems of hydration (water is precipitated from the colloid) and large cracks during use and storage, and because the silicate particles are large, the dispersibility is poor, and there is a certain sensitivity to temperature. The small capacitive capacity leads to large water loss, uneven conduction, weak high-current discharge performance, poor cycle capacity of the battery, and the problem of thermal runaway of the sealed lead-acid batte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/08
CPCY02E60/126Y02E60/10
Inventor 董李温小平熊正林
Owner 深圳理士电源发展有限公司
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