Silicon mixed colloid electrolyte for lead acid storage batteries

A colloidal electrolyte and lead-acid battery technology, which is applied in lead-acid batteries, electric vehicles, vehicle energy storage, etc., can solve the problems of high price of fumed silica, high viscosity of colloidal electrolyte, and inability to fill batteries, etc., to achieve improvement Large discharge performance, deep discharge performance improvement, and the effect of avoiding hydration stratification

Inactive Publication Date: 2011-04-13
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

The disadvantage is that the price of fumed silica is high, there are few domestic varieties, and the source is difficult
The colloidal electrolyte prepared with it h

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  • Silicon mixed colloid electrolyte for lead acid storage batteries

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[0018] The invention relates to the problem of mixing two gelling agents in a silica sol colloidal electrolyte. The essence is to complement the advantages and disadvantages of different gelling agents and colloidal electrolytes, so as to reduce the cost of colloidal electrolyte raw materials, and the electrolyte is uniform, stable and non-hydratable Delamination, the capacity of the gel battery is improved, the large discharge performance is improved, and the cycle life is extended.

[0019] The silica mixed sol colloidal electrolyte used in lead-acid batteries according to the present invention includes 89-93.5% sulfuric acid solution with a density of 1.26-1.32 g / ml and a concentration of 2.5-10% in percentage. It is 40% silica sol, 1-4% fumed silica, and the total silica content in the electrolyte is 5%. Among them, the optimal density of the sulfuric acid solution is 1.28g / ml, and the sulfuric acid solution is a mixture of sulfuric acid and water. Silica sol is a milky whit...

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Abstract

The invention discloses silicon mixed colloid electrolyte for lead acid storage batteries, comprising the following components: 89-93.5% of sulfuric acid solution with the density of 1.26-1.32g/ml, 2.5-10% of silica solution with the concentration of 40%, and 1-4% of fumed silica, wherein the total silica content in the silicon mixed colloid electrolyte is 5%, and the ratio of the net content of silica in 40% silica solution to the net content of silica in the fumed silica is 4:1 to 1:4. The colloid batteries produced by the method have the respective characteristics of the two gels; and the battery capacity is greatly enhanced, the large discharging performance of the colloid batteries is improved, the cycle life is prolonged, and the deep discharging performance is improved, thus the collid batteries can be widely used in the fields of solar energy and wind energy off-grid systems, electric power, communication, military communication stations, electric vehicles and the like.

Description

technical field [0001] The invention relates to a colloidal battery electrolyte, in particular to a colloidal electrolyte containing silicon mixed sol used in lead-acid batteries, so as to effectively increase and improve the service life and quality of use of the lead-acid batteries. Background technique [0002] Colloidal lead-acid batteries are a major innovation and transformation of ordinary lead-acid batteries. They are widely used in power systems in solar and wind energy off-grid systems, electric power, telecommunications, communications, military communication stations, and electric vehicles. [0003] The electrolyte of colloidal lead-acid batteries is mainly composed of sulfuric acid and gelling agent, which is thixotropic. The gelling agent forms hydrogen bonds through the hydroxyl groups on its surface, forming a three-dimensional network structure in the system, enclosing sulfuric acid and water in it, so the colloidal electrolyte is solid when it is still. Wh...

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Application Information

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IPC IPC(8): H01M10/08
CPCY02T10/7016Y02E60/126Y02E60/10
Inventor 陈红雨潘珂
Owner SOUTH CHINA NORMAL UNIVERSITY
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