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Two-phase mixed polymeric additive used for lead storage battery and preparation method of additive

A lead-acid battery and additive technology, applied in the direction of lead-acid battery, secondary battery repair/maintenance, etc., can solve the problems of unsatisfactory electrochemical performance of lead-acid battery, unstable micro-dispersion system, poor stability, etc. Chemical properties, slowing lattice collapse rate, effect of prolonging cycle life

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 silica colloid and organic polymer colloid have their own advantages and disadvantages. The former has high viscosity but has a relatively stable life decay. not as good as the former
[0004] The lead storage battery industry has been looking for a technical solution that complements the advantages of fumed silica colloids and silicone composition colloids, but some methods of simply mixing the two types of colloids have not been successful. The technical reason is: conventional fumed silica gel body is a kind of water phase, but the silicone composition is a kind of hydrophilic oil phase, the microdispersion system of simply mixing the two is unstable, and the electrochemical performance of the lead storage battery after adding the electrolyte is unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

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

[0039] 1) divide described emulsifying agent into two parts, standby;

[0040] 2) Stir and mix the A component and the B component fully, then add the C component, fully stir and mix;

[0041] 3) using one of the emulsifiers to adjust the HLB of the mixture obtained in step 2) to 10-14;

[0042] 4) Adjust the HLB of the other part of the emulsifier to 10-14, add the industrial pure water, mix well, then add the fumed silica, stir well and mix well; in this step, Including adjusting the clarity of the final mixture by adjusting the ratio of industrially pure water containing emulsifiers to fumed silica;

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

Embodiment 1

[0061] Design a kind of target to be added in lead-acid accumulator with sulfuric acid liquid, the two-phase mixed polymerization additive that can increase the anti-softening ability of positive electrode active material, at first prepare materials, this two-phase mixed polymerization additive is based on 100 parts by volume, and component and content are:

[0062] Component A: Use an organosiloxane with several (-C-Si-O-) segment structures in the main chain skeleton, its side group contains H, the molecular weight is 1200, and the addition amount is 6 parts by volume;

[0063] Component B: methyl silicone rubber with a viscosity of 1000 Pa, 6 parts by volume;

[0064] Component C: 10wt% ethyl orthosilicate, 58 parts by volume;

[0065] Industrial pure water: 27.5 parts by volume;

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

[0067] 0.5 parts by volume of emulsifier: choose Span 20 and Tween 80, of which Span 20 is prepared as 0....

Embodiment 2

[0076] Mix the two-phase co-polymerization additive obtained in Example 1 with the sulfuric acid solution with a density of 1.245 at a volume ratio of 1:100, as a colloidal electrolyte for a lead-acid battery.

[0077] Fill the colloidal electrolyte into a 2V500Ah lead-acid battery with a valve-regulated AGM separator structure for energy storage. After conventional impregnation and formation charging, it becomes a special colloidal lead-acid battery for outdoor energy storage with high temperature resistance. The two-phase mixed polymerization additive of this example is used to fill lead-acid batteries with sulfuric acid solution at a volume ratio of 1:100. Under the same density of sulfuric acid solution, the lead-acid batteries can achieve the effect of reducing internal resistance and increasing capacity.

[0078] In this embodiment, anhydrous sodium sulfate commonly used in the lead storage battery industry can also be added to the colloidal electrolyte. Anhydrous sodium ...

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Abstract

The invention provides a two-phase mixed polymeric additive of a lead storage battery and a preparation method of the additive. The two-phase mixed polymeric additive comprises the following components and contents based on 100 parts of volume: 1-6 parts of organic siloxane which takes a (-C-Si-O-)-structured main chain framework and comprises more than one kind of unsaturated hydrophilic active group in the side base, 1-6 parts of organic silicon rubber, 5-80 parts of 10-50wt% of tetraethoxysilane, 10-90 parts of industrial pure water, 2-12 parts of fumed silica, 0.1-0.5 parts of emulsifier;the two-phase mixed polymeric additive is prepared by the technological method disclosed in the invention and mixed with the conventional sulfuric acid solution to be added to the lead storage battery, so that the softening resistance of the positive electrode active material can be reinforced, and an effect 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 invention relates to the technical field of materials for lead-acid batteries, in particular to a material, formula and preparation method of a two-phase mixing additive for lead-acid batteries. Background technique [0002] In recent years, the energy storage market generally requires large-capacity batteries for supporting applications, but conventional batteries have a short lifespan and high waste rate in outdoor use, which restricts the commercial application of energy storage. The industry generally agrees that adding an appropriate amount of colloidal substances to the sulfuric acid solution of lead-acid batteries can effectively increase the life of outdoor use. [0003] The colloid traditionally used in lead storage batteries is fumed silica, which is fully liquefied by industrial pure water or other solvent methods during use; in the Chinese invention patent publication number CN1383225A, a polyelement organosiloxane is disclosed. , sili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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