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Mixed polymeric additive used for lead storage battery electrolyte and preparation method of additive

A technology of lead-acid batteries and additives, applied in the direction of lead-acid batteries, etc., can solve problems such as 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: 2018-01-19
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 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 additive of the lead storage battery electrolyte 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) The industrial pure water is divided into two parts, and the emulsifier is divided into three parts, one of which is 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 and add it to the mixture obtained in step 2), and fully stir the mixture in this step to mix evenly;

[0042] 4) Add the sodium lauryl sulfate to the mixture obtained in step 3), stir and mix well; then, measure the HLB of the mixture at this time, if the HLB of the mixture is not in the range of 10 to 14 at this time, use the described Another spare part of emulsifier is used to adjust the HLB of...

Embodiment 1

[0063] 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:

[0064] 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;

[0065] Component B: methyl silicone rubber with a viscosity of 1000 Pa, 7 parts by volume;

[0066] Industrial pure water: 83 parts by volume;

[0067] Fumed silica: 2 parts by volume (conversion value of weight / specific gravity);

[0068] Sodium lauryl sulfate: 0.5 parts by volume

[0069]0.5 parts by volume of emulsifier: choose the combination of Span 20 and Tween 80, of which Span 20 is prepared for 0.2 parts by volume, and ...

Embodiment 2

[0079] 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.

[0080] 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.

[0081] In this embodiment, anhydrous sodium sulfate commonly used in th...

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Abstract

The invention provides a mixed polymeric additive of a lead storage battery electrolyte and a preparation method of the additive. The mixed polymeric additive comprises the following components and contents based on 100 parts of volume: 1-7 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 inthe side base, 1-7 parts of organic silicon rubber, 68.5-95.75 parts of industrial pure water, 2-15 parts of fumed silica, 0.2-2 parts of lauryl sodium sulfate and 0.05-0.5 parts of emulsifier; the mixed polymeric 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 an effect of assisting the softened positive electrode active material to be re-hardened can be realized, and the advantagesof low addition amount and high cost performance can be achieved.

Description

technical field [0001] The invention relates to the technical field of lead storage battery materials, in particular to a material, formula and preparation method of a mixing additive for lead storage battery electrolyte. 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 lead-acid bat...

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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