Gelled electrolyte of gelled lead acid battery and preparation method thereof

A colloidal electrolyte and lead-acid battery technology, applied in the direction of lead-acid batteries, can solve problems such as potential safety hazards, three-dimensional structure changes, and affecting the effective function of microporous cracks "channels", so as to prolong the storage period, alleviate the hydration phenomenon, Improve practicality and stability

Inactive Publication Date: 2016-07-13
盛世骏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its good reversible thixotropy can easily lead to changes in the three-dimensional structure of the colloid, resulting in hydration of the electrolyte during charging, which in turn affects the effective function of the microporous crack "channel".
Especially for batteries that require lying down, the hydration phenomenon will cause great safety hazards

Method used

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  • Gelled electrolyte of gelled lead acid battery and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0029] A colloidal electrolyte for a colloidal lead-acid battery, the preparation method of which comprises the following steps:

[0030] 1) Preparation of acid gel: fumed silica (150g / m 2 ) and sulfuric acid (1.36g / cm 3 ) according to the mass ratio of 3.8:100 by mixing and stirring. The specific preparation steps are as follows: in a high-speed shear mixer, disperse the fumed silica in sulfuric acid for 3 times, respectively according to 50%, 35%, 15% The amount (accounting for the percentage of the total amount of fumed silica added in the acid gel) is added; with the increase of the amount of silica, the agitator will change the speed of fumed silica and sulfuric acid from low to high at a speed of 500-8000r / min. Stir and disperse, the whole dispersion time is 60min, and the acid gel with network colloidal structure is obtained;

[0031] 2) Preparation of water gel: fumed silica (150g / m 2 ) and pure water by mixing and stirring at a mass ratio of 18:100. The specific st...

Embodiment 2

[0035]A colloidal electrolyte for a colloidal lead-acid battery, the preparation method of which comprises the following steps:

[0036] 1) Preparation of acid gel: fumed silica (200g / m 2 ) and sulfuric acid (1.32g / cm 3 ) according to the mass ratio of 1.5:100 by mixing and stirring. The specific preparation steps are as follows: in a high-speed shear mixer, disperse the fumed silica in sulfuric acid for 3 times, respectively according to 50%, 35%, 15% The amount (accounting for the percentage of the total amount of fumed silica added in the acid gel) is added; with the increase of the amount of silica, the agitator will change the speed of fumed silica and sulfuric acid from low to high at a speed of 500-8000r / min. Stir and disperse, the whole dispersion time is 50min, and the acid gel with network colloid structure is obtained;

[0037] 2) Preparation of water gel: fumed silica (200g / m 2 ) and pure water by mixing and stirring at a mass ratio of 12:100, the specific steps...

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Abstract

The invention discloses a gelled electrolyte of a gelled lead acid battery.The gelled electrolyte is prepared from, by mass, 28-52% of acid gel, 45-70% of glue and 0.1-3% of anionic polyacrylamide.The acid gel is prepared by mixing and stirring fumed silica and sulfuric acid in proportion; the glue is prepared by mixing and stirring fumed silica and sulfuric acid in proportion.By preparing the acid gel and the glue of the different three-dimensional network structures, the content of silicon dioxide is reasonably controlled, the additive amount of the anionic polyacrylamide is increased, the hydration phenomenon of the obtained gelled electrolyte is effectively relieved, the storage cycle can be prolonged, and the practicability and stability of the gelled electrolyte in the gelled battery are improved.Meanwhile, due to the fact that the acid gel and the glue are prepared respectively and compounded, the raw material cost can be effectively reduced, and the related preparation method is simple and suitable for being applied and popularized.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional composite materials, and in particular relates to a colloidal electrolyte of a colloidal lead-acid battery and a preparation method thereof. Background technique [0002] Colloidal lead-acid battery has a long service life, good charge-discharge cycle performance, the battery can operate in a partially charged state, can withstand deep discharge, and has high temperature performance, which is better than flooded batteries and glass fiber separator batteries, and is less prone to thermal runaway Etc. [0003] At present, the industry mainly uses fumed silica to prepare colloidal electrolyte. The silicon particle size of fumed silica is small (usually 7-40nm), and the specific surface area is large (usually 100-500m 2 / g), has a unique molecular structure full of a variety of silanol groups. When fumed silica is dispersed in a sulfuric acid solution medium, the independent silano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/10
CPCH01M10/10Y02E60/10
Inventor 戴超
Owner 盛世骏
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