Colloidal electrolyte for lead-acid storage battery and preparation method of colloidal electrolyte

A colloidal electrolyte and lead-acid battery technology, applied in the direction of lead-acid battery, lead-acid battery construction, final product manufacturing, etc., can solve the problem that the performance of colloidal electrolyte gel is greatly affected, the gelation process is slow, and the gel strength is weak. Problems, to avoid shortening the gelation time, increase the gel strength, and facilitate the effect of glue filling

Active Publication Date: 2013-09-04
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrolyte system prepared by dispersing silica gel is prone to hydration stratification during battery charging and discharging, and its particle size has a great influence on the gel performance of the colloidal electrolyte. When the particle size is small, the gelation rate is fast and the gel strength Large; when the particle size is large, the gelation process is slow and the gel strength is weak

Method used

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Examples

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Effect test

preparation example Construction

[0029] The preparation method of the colloidal electrolyte includes the following steps:

[0030] First, prepare sulfuric acid, and add sodium sulfate to the sulfuric acid;

[0031] Secondly, use dispersed silica gel A and water to prepare dispersed silica gel A, and use dispersed silica gel B and water to prepare dispersed silica gel B;

[0032] Then, add water, fumed silica, dispersing silica gel A and dispersing silica gel B to the high-speed dispersing shearing machine to obtain milky white masterbatch. The preferred linear speed of the high-speed dispersing shearing machine is 15m / s, and the operating time is 3min. ;

[0033] Finally, the masterbatch and sulfuric acid are pre-cooled to 5-15°C in cooling water, and then mixed at a high speed according to a mass ratio of 1:1-1:4.

Embodiment 1

[0036] First, prepare the mass score W 2 = 46.7% sulfuric acid 1000g, add 13.3g sodium sulfate to the prepared sulfuric acid;

[0037] Then, weigh 775.2g of water into the high-speed dispersing shearer, and then add 125.5g of fumed silica, 78.4g of dispersed silica gel A with a silicon content of 40.0wt% and 78.4g of dispersed silica gel with a silicon content of 15.0wt%. B liquid 20.9g; high-speed dispersive shearing machine cuts for 3min under the condition of 15m / s online speed to obtain milky white masterbatch with silicon content of 16.0wt%;

[0038] Finally, the masterbatch and sulfuric acid are pre-cooled to 10°C and mixed at a high speed of 1:3 for 5 minutes at a mass ratio.

[0039] The colloidal electrolyte prepared in this example has a total silicon content of 4.0wt%, a sodium sulfate content of 1.0wt%, and a sulfuric acid density of 1.26g / mL; the electrolyte prepared according to this formula and preparation method is comparable to pure fumed silica with the same silicon...

Embodiment 2

[0042] First, prepare the mass score W 2 = 46.7% sulfuric acid 1000g, add 13.3g sodium sulfate to the prepared sulfuric acid;

[0043] Then, weigh 743.3g of water into the high-speed dispersing shearing machine, and then add 120.8g of fumed silica, 75.5g of dispersed silica gel A with a silicon content of 40.0wt%, and a dispersed silica gel with a silicon content of 15.0wt%. B solution 60.4g; high-speed dispersive shearing machine cuts for 3min at an online speed of 15m / s to obtain a milky white masterbatch with a silicon content of 16.0wt%;

[0044] Finally, pre-cool the masterbatch and sulfuric acid to 5°C, and then mix at high speed for 5 minutes at a mass ratio of 1:3;

[0045] The gel electrolyte prepared in this example has a total silicon content of 4.0wt%, a sodium sulfate content of 1.0wt%, and a sulfuric acid concentration of 1.26g / mL; the initial gelation time of the electrolyte of this formula at 25°C is 35min and the complete gelation time is 130min ; The gel strength o...

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Abstract

The invention discloses a colloidal electrolyte for a lead-acid storage battery, which relates to the field of storage batteries. The gel strength is an important factor reflecting the performance of a colloidal electrolyte and is mainly influenced by the content of a gelling agent; and with the increment of the content of fumed silica, the gel time of an electrolyte solution is greatly shortened and the difficulty for gel filling is caused. The colloidal electrolyte provided by the invention comprises a gelling agent, sulfuric acid and sodium sulfate, wherein the gelling agent comprises fumed silica and disperse silica gels A and B with different particle sizes. The colloidal electrolyte is prepared from the disperse silica gel with large particle size, the disperse silica gel with small particle size and the fumed silica, and an additive, namely the sodium sulfate, contributing to the improvement of the electrochemical performance of the battery is added at the same time. On the promise of not increasing the content of silicon in the colloidal electrolyte, the key performance of the colloidal electrolyte is broken through on the two aspects that firstly, the gel strength is enhanced, and secondly, the gel time is prolonged. Therefore, the pouring of the storage battery is facilitated, the performance of the colloidal electrolyte is improved, and the service life of the colloidal electrolyte is prolonged.

Description

【Technical Field】 [0001] The invention relates to the field of batteries, in particular to a colloidal electrolyte formula for lead-acid batteries and a preparation method thereof. 【Background technique】 [0002] Lead-acid batteries are widely used, and their output value and output rank first in various chemical power sources worldwide. The use of colloidal electrolyte is an important innovation for lead-acid batteries, which will give new life to lead-acid batteries. This technological innovation uses the surface hydroxyl of silica to form a three-dimensional network structure under the action of sulfate radical bridging, thereby fixing the sulfuric acid electrolyte and turning it from a liquid state to a gel state. The colloidal electrolyte can effectively prevent the stratification of sulfuric acid and make the charge and discharge of lead-acid batteries stable; the battery start-up performance and deep discharge resistance performance have been well improved; and the growth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/10H01M10/12
CPCY02E60/10Y02P70/50
Inventor 赵剑曦林本慧万南红周明明
Owner CHAOWEI POWER CO LTD
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