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Mixed colloidal electrolyte and preparation technology thereof

A colloidal electrolyte and a preparation process technology, applied in the field of mixed colloidal electrolyte and its preparation process, can solve the problems of insufficient shear force, high viscosity, easy hydration and delamination, etc., and achieve easy perfusion, moderate gel strength, and thixotropy. Good results

Active Publication Date: 2015-06-17
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that silica sol is easy to hydrate and stratify
The gelled state of the colloidal electrolyte prepared by fumed silica is very good, and there is no hydration stratification phenomenon, but its disadvantage is that it has a high viscosity and it is very difficult to pour into the battery
[0003] The traditional colloidal preparation process usually uses soaking silica, sulfuric acid, water and additives, and then manually stirring or stirring, the colloidal electrolyte prepared in this way is not uniformly dispersed due to insufficient shear force, and the electrolyte is unstable. Easy to hydrate and stratify
Or the colloidal electrolyte prepared with fumed silica has a high viscosity and is difficult to perfuse

Method used

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  • Mixed colloidal electrolyte and preparation technology thereof
  • Mixed colloidal electrolyte and preparation technology thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] One, the preparation of silicon powder aqueous solution:

[0034] a. Add 200 kg of deionized water with a conductivity of 1.78 μs / cm into a bucket with a stirring device, that is, a rotating speed of 2880 rpm,

[0035] b. Add 1Kg of analytically pure glycerin to the bucket with stirring device,

[0036] c, add 8Kg precipitated silica in the bucket with stirring device,

[0037] d. Completely inhale the mixed fumed silica into pure water,

[0038] e. Turn on the mixer, the speed of the mixer is 2880 rpm, the length of the blade of the mixer is about 200 mm, and stir for 15 minutes, so that the precipitated silica and fumed silica are fully dispersed in the solution under stirring.

[0039] f. Add 15g of analytically pure polyacrylamide into a barrel with a stirring device, and stir for 10 minutes to make the solution evenly stirred and set aside.

[0040] Two, the preparation of mixed acid:

[0041] g. Add 500Kg of deionized water with a conductivity of 1.78μs / cm int...

Embodiment 2

[0058] One, the preparation of silicon powder aqueous solution:

[0059] a. Add 200 kg of deionized water with a conductivity of 1.78 μs / cm into a bucket with a stirring device, that is, a rotating speed of 2880 rpm,

[0060] b. Add 1.2Kg of analytically pure glycerin to the bucket with stirring device,

[0061] c, add 12Kg precipitated silica in the bucket with stirring device,

[0062] d. Completely inhale the mixed fumed silica into pure water,

[0063] e. Turn on the mixer, the speed of the mixer is 2880 rpm, the length of the blade of the mixer is about 200 mm, and stir for 15 minutes, so that the precipitated silica and fumed silica are fully dispersed in the solution under stirring.

[0064] f. Add 20g of analytically pure polyacrylamide into a barrel with a stirring device, and stir for 10 minutes to make the solution evenly stirred and set aside.

[0065] Two, the preparation of mixed acid:

[0066] g. Add 500Kg of deionized water with a conductivity of 1.78μs / cm ...

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Abstract

The invention relates to storage battery electrolyte, especially relates to the mixed colloidal electrolyte and preparation technology thereof. The colloidal electrolyte comprises silicon powder aqueous solution and mixed acid solution, and the weight ratio between the silicon powder aqueous solution and the mixed acid solution is 1:4, and the acid fixing ability of the colloid prepared by the technical scheme reaches to 96.25%, and compared with the previous colloid, the acid fixing ability increased by 5-10%, and the gel intensity reaches to 45 mm which is moderate and the gel is easy to be poured in, and the product is stable after gelling with hydration layering and good thixotropy. According to the preparation technology of the mixed colloidal electrolyte, parts of additives in the specific preparation process are dissolved by supersonic wave, and each substance in the mixed colloidal electrolyte is mixed uniformly according to the preparation technology, thereby avoiding nonuniform mixing between each object of the mixed colloidal electrolyte which influences the performance of the electrolyte, and further improving the quality of the mixed colloidal electrolyte with moderate gel intensity, easy perfusion, stability after gelling, and good thixotropy without hydration layering.

Description

technical field [0001] The invention relates to battery electrolytes, in particular to a mixed colloidal electrolyte and a preparation process thereof. Background technique [0002] Gel batteries are better than ordinary lead-acid batteries in terms of cycle life, resistance to overcharge and overdischarge, and undercharge. Gel batteries are becoming more and more popular. The most critical technology of colloidal batteries is colloidal electrolyte. In order to improve the performance of gel batteries, more and more people are developing gel electrolytes for lead-acid batteries with superior performance. The properties of colloidal electrolytes mainly depend on the colloid formula and its preparation process. There are usually two types of colloidal electrolytes for traditional lead-acid batteries: one is silica sol, and the other is colloidal electrolytes prepared with fumed silica. These two colloidal electrolytes have their own advantages and disadvantages. Silica sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/10
CPCY02E60/10
Inventor 周明明杜恩生王亮杜静
Owner CHAOWEI POWER CO LTD
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