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Colloidal electrolyte solution for lead-acid battery and preparation method thereof

A colloidal electrolyte, lead-acid battery technology, applied in the direction of lead-acid battery, lead-acid battery construction, final product manufacturing, etc. The problem of uneven distribution of colloidal electrolyte can improve the overall charge acceptance, prolong the cycle life of charge and discharge, and improve the efficiency and uniformity.

Inactive Publication Date: 2011-11-30
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this mixed colloidal electrolyte integrates the advantages of sodium silicate colloidal electrolyte and vapor phase silica colloidal electrolyte, it meets the requirements of lead-acid batteries and has been widely used in the field of power lead-acid batteries. Because the nano-silica powder has a strong coagulation ability, the penetration ability of the mixed colloidal electrolyte is significantly reduced, especially when it is applied to a battery with a larger size, the penetration ability of the mixed colloidal electrolyte is difficult to meet the requirements , resulting in the uneven distribution of the mixed colloidal electrolyte inside the battery, causing a significant drop in the electrical performance of the battery; The cycle life is only less than 200 times

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The specific steps of preparation are as follows: step 1, first mix silicon dioxide powder, sodium hydroxide and deionized water in a weight ratio of 1:0.85:10, and then stir for 20 minutes to obtain a sodium silicate solution. Add potassium sulfate into dilute sulfuric acid with a concentration of 65%, and dissolve to obtain a dilute sulfuric acid mixed solution; wherein, the content of potassium sulfate in the dilute sulfuric acid mixed solution is 0.1 wt%. Then the dilute sulfuric acid mixed solution is added in the sodium silicate solution and stirred for 0.5h to obtain a silica colloidal suspension solution whose sulfuric acid content is 30wt%; wherein, the weight ratio between the dilute sulfuric acid mixed solution and the sodium silicate solution is 1: 1. Step 2, first mix the nano-scale fumed silica powder with deionized water, and prepare a suspension of fumed silica nano-powder with a solid content of 4wt%; wherein, the monomer of the nano-scale fumed silica ...

Embodiment 2

[0018] The specific steps of preparation are as follows: step 1, first mix silicon dioxide powder, sodium hydroxide and deionized water in a weight ratio of 1:1:10, and then stir for 24 minutes to obtain a sodium silicate solution. Potassium sulfate was then added into dilute sulfuric acid with a concentration of 68%, and dissolved to obtain a dilute sulfuric acid mixed solution; wherein, the content of potassium sulfate in the dilute sulfuric acid mixed solution was 0.2 wt%. Then the dilute sulfuric acid mixed solution is added in the sodium silicate solution and stirred for 0.6h to obtain a silica colloidal suspension solution whose sulfuric acid content is 34wt%; wherein, the weight ratio between the dilute sulfuric acid mixed solution and the sodium silicate solution is 1.4: 1. Step 2, first mix the nano-scale fumed silica powder with deionized water, and prepare a suspension of fumed silica nano-powder with a solid content of 5wt%; wherein, the monomer of the nano-scale f...

Embodiment 3

[0020]The specific steps of preparation are as follows: step 1, first mix silicon dioxide powder, sodium hydroxide and deionized water in a weight ratio of 1:1.2:10, and then stir for 28 minutes to obtain a sodium silicate solution. Potassium sulfate is then added into dilute sulfuric acid with a concentration of 70%, and dissolved to obtain a dilute sulfuric acid mixed solution; wherein, the content of potassium sulfate in the dilute sulfuric acid mixed solution is 0.3wt%. Then the dilute sulfuric acid mixed solution is added in the sodium silicate solution and stirred for 0.7h to obtain a silica colloidal suspension solution whose sulfuric acid content is 38wt%; wherein, the weight ratio between the dilute sulfuric acid mixed solution and the sodium silicate solution is 1.8: 1. Step 2, first mix nano-scale fumed silica powder with deionized water, and prepare a suspension of fumed silica nano-powder with a solid content of 6wt%; wherein, the monomer of nano-scale fumed silic...

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Abstract

The invention discloses a lead-acid storage battery colloidal electrolyte and a preparation method thereof. The electrolyte consists of the following components: sulfuric acid, silicon dioxide, sodium sulfate, polyacrylamide, sodium polyacrylate, sodium molybdate, calcium molybdate, magnesium molybdate, sodium tungstate, potassium sulfate and deionized water; method steps It is: add potassium sulfate to dilute sulfuric acid to obtain a dilute sulfuric acid mixed solution, then add it to a sodium silicate solution to obtain a silica colloidal suspension solution, and then add sodium molybdate to the fumed silica nanopowder suspension , calcium molybdate, magnesium molybdate and sodium tungstate to obtain nano fumed silica powder suspension solution, and then prepare polyacrylamide solution and sodium polyacrylate solution, and then, first mix silica colloidal suspension solution and nano vapor phase The silicon dioxide powder suspension solution is mixed uniformly, and then polyacrylamide solution and sodium polyacrylate solution are added thereinto to prepare lead-acid battery colloidal electrolyte. It can be widely used in storage batteries with a capacity above 20AH.

Description

technical field [0001] The invention relates to a battery electrolyte and a preparation method thereof, in particular to a lead-acid battery colloid electrolyte and a preparation method thereof. Background technique [0002] At present, people often use electric bicycles, such as various commercially available ones, for the convenience and energy saving of travel, and the general improvement of environmental protection awareness. In these electric bicycles, lead-acid batteries are basically used as the power source, and the quality of the electrolyte in the lead-acid battery determines the performance and service life of the battery. In order to improve the performance of the electrolyte, people have made Unremitting efforts, such as "a mixed colloidal electrolyte for lead-acid batteries and its preparation method" disclosed in the Chinese invention patent application publication CN 1747216A published on March 15, 2006. The invention intends to provide a mixed colloid elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/10H01M10/12
CPCY02E60/126Y02E60/10Y02P70/50
Inventor 陈小川田兴有
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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