Polymeric additive of lead storage battery and preparation method of polymeric additive

A lead-acid battery and additive technology, which is applied in the repair/maintenance of lead-acid batteries and secondary batteries, can solve problems such as high viscosity, poor workmanship, and unsatisfactory electrochemical performance of lead-acid batteries, and achieve wide application and good use effect , the effect of improving the electrochemical performance

Inactive Publication Date: 2018-01-19
东莞恒量新能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After more than ten years of application, the industry generally believes that fumed silica colloid and polymer siloxane polymer colloid have their own advantages and disadvantages. The former has high viscosity and poor workmanship, and the lead-acid battery has no benefits of reducing internal resistance and increasing capacity, but its life decay is relatively stable. The latter has low viscosity, good manufacturability, and the lead-acid battery can obtain the benefits of reducing internal resistance and increasing capacity, but the stability is not as good as the for

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] The polymeric additives used in the lead storage battery of the present invention cannot be mixed by one-pot method, and must be prepared by following a certain technological method after preparing the materials. The preparation method includes:

[0039] 1) Divide the industrial pure water into two parts, and divide the emulsifier into 3 parts for use;

[0040] 2) Stir and mix the A component and the B component thoroughly;

[0041] 3) Adjust the HLB of one part of the emulsifier to 7-9, add one part of industrial pure water, mix well and add it to the mixture obtained in step 2), stir and mix well, and then use the other part to emulsify Adjust the HLB of the mixture obtained in this step to 10-14;

[0042] 4) Adjust the HLB of the said emulsifier to 10-14, add another part of industrial pure water, and after mixing it thoroughly, add the fumed silica and stir for more than 10 minutes;

[0043] 5) The mixture obtained in step 3) and the mixture obtained in step 4) are mixed uni...

Example Embodiment

[0061] Example 1

[0062] Design a kind of polymer additive that aims to be added to the sulfuric acid solution used in lead storage batteries to increase the anti-softening ability of the positive electrode active material. The polymer additive is based on 100 parts by volume. The components and content are:

[0063] Component A: Use a siloxane with several (-Si-O-Si-) segment structures in the main chain skeleton, its side group contains H, the molecular weight is 1200, and the addition amount is 7 parts by volume;

[0064] B component: methyl silicone oil with a viscosity of 1000 Pa, 7 parts by volume;

[0065] Industrial pure water: 83.5 parts by volume;

[0066] Fumed silica: 2 parts by volume (weight / specific gravity conversion value);

[0067] Emulsifier 0.5 part by volume: choose Span 20 and Tween 80, of which, Span 20 is prepared for 0.2 part by volume, and Tween 80 is prepared for 0.3 part by volume. The actual amount can be adjusted to achieve the design goal of adjusting the ...

Example Embodiment

[0075] Example 2

[0076] The polymer additive obtained in Example 1 and the sulfuric acid solution of a lead storage battery with a density of 1.245 were uniformly mixed in a volume ratio of 1:99, which was used as a colloidal electrolyte of a siloxane composition, silica and sulfuric acid solution.

[0077] The gel electrolyte is poured into a 2V500Ah lead storage battery with a valve-regulated AGM separator structure for energy storage, and after conventional immersion, chemical conversion and charging, it becomes a high-temperature-resistant colloidal lead storage battery for outdoor energy storage. The polymer additive of this embodiment is used for filling the lead storage battery with a volume ratio of 1:99 mixed sulfuric acid solution. Under the same density of the sulfuric acid solution, the lead storage battery can significantly reduce internal resistance and increase capacity.

[0078] In this embodiment, anhydrous sodium sulfate commonly used in the lead storage battery i...

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Abstract

The invention provides a polymeric additive of a lead storage battery and a preparation method of the polymeric additive. The polymeric additive comprises the following components and contents based on 100 parts of volume: 1-7 parts of siloxane which takes a (-Si-O-Si-)-structured main chain framework and comprises more than one kind of unsaturated hydrophilic active group in the side base, 1-7 parts of organic silicon oil, 68.5-95.95 parts of industrial pure water, 2-17 parts of fumed silica and 0.05-0.5 parts of emulsifier; the additive is prepared by the technological method disclosed in the invention; and a mixed conventional sulfuric acid solution is added to the lead storage battery, so that the softening resistance of the positive electrode active material can be reinforced, and aneffect of assisting the softened positive electrode active material to be re-hardened can be realized, and the advantages of low addition amount and high cost performance can be achieved.

Description

Technical field [0001] The present invention relates to the technical field of materials for lead storage batteries, in particular to a material, formula and preparation method of polymeric additives for lead storage batteries. Background technique [0002] Lead-acid batteries are abbreviated as batteries, and occupy an absolute dominant position in high-power / large-capacity fields such as electric tractors, vehicle and ship starting, communication stations, energy storage, etc. In recent years, with the development of photovoltaic power generation industry and wind power generation industry, the market generally requires large-capacity Batteries are used for energy storage, but conventional batteries show short life and high waste rate in outdoor use, which restricts the commercial application of photovoltaic energy storage systems. The industry generally agrees that adding an appropriate amount of colloidal substances to the sulfuric acid solution of lead batteries can effectiv...

Claims

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Application Information

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IPC IPC(8): H01M10/08H01M10/42
CPCY02E60/10
Inventor 刘粤荣廖媛菲
Owner 东莞恒量新能源科技有限公司
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