Mixed polymerization additive for lead storage battery and preparation method of mixed polymerization additive

A lead-acid battery and additive technology, which is applied in the direction of lead-acid batteries, can solve the problems of poor manufacturability, unsatisfactory electrochemical performance of lead-acid batteries, and poor stability, so as to improve softening resistance and recovery hardening, improve electrochemical performance, good effect

Inactive Publication Date: 2018-01-12
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 colloids and organic polymer colloids have their own advantages and disadvantages. The former has high viscosity and poor workmanship, and lead-acid batteries have no benefits of reducing internal resistance and increasing capacity, but the life decay is relatively stable, while the latter has low viscosity. , good manufacturability and lead-acid batteries can obtain the benefits of reducing internal resistance and increasing capacity, but the stability is not as good as the former
[0004] In recent years, the lead storage battery industry has been seeking a technical solution that can complement the advantages of fumed silica colloids and silicone composition colloids. However, some methods of simply mixing the two types of colloids have not been successful. The technical reasons are: conventional Fumed silica colloid is a kind of water phase, but the silicone composition is a kind of hydrophilic oil phase, and the microdispersion system of simply mixing the two is unstable, and the lead after adding the electrolyte Battery electrochemical performance is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The mixed polymerization additives for lead-acid batteries of the present invention cannot be mixed by one-pot method, and must be prepared by following a certain process after preparing materials. The preparation method comprises:

[0039] 1) The industrial pure water is divided into two parts, and the emulsifier is divided into three parts for subsequent use;

[0040] 2) fully stir and mix the A component and the B component;

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

[0042] 4) Adjust the HLB of another part of the emulsifier to 10-14, add another part of industrial pure water, and mix well, then add the fumed silica and stir for more than 10 minutes;

[0043] 5) Mix the mixture obtained in step 3) and the mixture obtained in ...

Embodiment 1

[0062] Design a kind of target to be added in the sulfuric acid liquid of lead-acid storage battery, can increase the anti-softening ability of positive electrode active material mixed polymerization additive, at first prepare materials, this mixed polymerization additive is based on 100 parts by volume, and component and content are:

[0063] 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 7 parts by volume;

[0064] Component B: methyl silicone rubber 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 (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 for 0.2 parts by volume, and Tween 80 is prepared for 0.3 parts by volume. The actual dosage can b...

Embodiment 2

[0076] The mixed polymerization additive obtained in Example 1 and the sulfuric acid solution with a density of 1.245 were uniformly mixed at a volume ratio of 1:100 to form a colloidal electrolyte for a lead-acid storage battery, in which an organosilicon composition, silicon dioxide and sulfuric acid solution were mixed.

[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 mixed polymerization additive of this example is used to fill the lead-acid battery with sulfuric acid solution at a volume ratio of 1:100. Under the same density of sulfuric acid solution, the lead-acid battery can obviously reduce the internal resistance and increase the capacity.

[0078] In this embodiment, anhydrous sodium sulfate commonly used in th...

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Abstract

The invention provides a mixed polymerization additive for a lead storage battery and a preparation method of the mixed polymerization additive. Based on 100 volume parts, the mixed polymerization additive is prepared from the following components: 1 to 7 volume parts of organic siloxane of which a main-chain framework is of a (-C-Si-O) structure and the side group contains one or more unsaturatedhydrophilic active groups, 1 to 7 volume parts of organic silicon rubber, 70.5 to 95.95 volume parts of industrial pure water, 2 to 15 volume parts of fumed silica and 0.05 to 0.5 volume part of an emulsifier. The mixed polymerization additive is prepared according to the technique disclosed by the invention; mixed conventional sulfuric acid is added into the lead storage battery, so that the anti-softening capacity of a positive electrode active substance can be improved; the mixed polymerization additive has the effect of promoting re-hardening of the softened positive electrode active substance, and has the advantages of small adding amount and high cost-performance ratio.

Description

technical field [0001] The invention relates to the technical field of materials for lead storage batteries, in particular to a material, formula and preparation method of a mixed polymerization additive for lead storage batteries. Background technique [0002] Lead-acid batteries are referred to as batteries for short, occupying an absolute dominant position in high-power / large-capacity fields such as electric tractors, vehicle and ship starting, communication stations, and energy storage; in recent years, with the development of photovoltaic power generation industry and wind power generation industry, the market generally demands large-capacity Batteries are used for energy storage, but conventional batteries have a short lifespan and a 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 lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/08
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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