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A kind of repairing agent for lead-acid battery and preparation method thereof

A lead-acid battery and repair agent technology, which is applied in the direction of lead-acid battery, secondary battery repair/maintenance, secondary battery, etc., can solve the problems of reducing battery charging acceptance, hindering electrolyte penetration, increasing battery internal resistance, etc. Achieve the effects of slowing down the sulfation rate, making the preparation method simple and easy, and improving the utilization rate

Inactive Publication Date: 2016-04-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But after a period of use, there will always be some PbSO 4 cannot be reduced to spongy Pb, these PbSO 4 Gradually accumulate and grow until the micropores of the plates and separators are blocked, hindering the penetration of the electrolyte, increasing the internal resistance of the battery, increasing the charging voltage, and finally reducing the charge acceptance of the battery. This is what we often refer to as sulfation
If there are problems such as high storage temperature, low floating charge voltage during use, insufficient initial charge, frequent insufficient charge, or deep discharge, the sulfation rate of the lead-acid battery will be faster. When the sulfation rate reaches a certain level, Batteries can only be scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.75g of dodecylbenzenesulfonic acid and 0.75g of polyethylene glycol to 297g of sulfuric acid solution with a pH value of 6, stir to make a transparent solution, then add 1.5g of particle size of about 20nm, resistivity of about 5× 10 -3 Ω.cm nano-carbon particles (prepared by electrolytic reduction of molten carbonate), stirred to form a translucent suspension, that is, a lead-acid battery repair agent with a nano-carbon content of 0.5wt.%. Choose a 2V100Ah valve-regulated battery that has just been out of service and is about to be scrapped. After removing the valve cover, add the repair agent. After charging and discharging for 2 cycles at 0.1C, discharge at a rate of 10 hours. The measured discharge capacity reaches 95Ah.

Embodiment 2

[0024] Add 0.01g of dodecylbenzenesulfonic acid, 0.01g of polyethylene glycol and 0.03g of dibenzylidene acetone to 97g of sulfuric acid solution with a pH value of 4, stir to make a transparent solution, add 1g of particle size about 50nm, the resistance rate about 8 x 10 -4 Ω.cm nano-carbon particles (prepared by electrolytic reduction of molten carbonate), stirred to form a translucent suspension, that is, a lead-acid battery repair agent with a nano-carbon content of 1wt.%. Choose two new 12V12Ah lead-acid batteries, one of which is filled with the repair agent according to 5% of the electrolyte capacity, and after charging to 14.8V with a current-limiting constant voltage, discharge at a rate of 2 hours, that is, 6.0A to 10.5V as a cycle. The other one does not add repairing agent; the charge-discharge cycle life of the storage battery adding the repairing agent of the present invention is 540 times, and the relative charge-discharging cycle life is increased by 92%, and ...

Embodiment 3

[0026] Add 0.08g of polyethylene glycol and 0.12g of dibenzylideneacetone to 99g of sulfuric acid solution with a pH value of 5, stir to make a transparent solution, add 0.8g of particle size of about 40nm, and resistivity of about 3×10 -3 Ω.cm nano-carbon particles (prepared by electrolytic reduction of molten carbonate), and stirred to form a translucent suspension, that is, a lead-acid battery repair agent with a nano-carbon content of 0.8wt.%. Choose a 2V300Ah valve-regulated battery that has just been out of service and is about to be scrapped. After removing the valve cover, add the repair agent, charge and discharge at a constant voltage for 2 cycles at a voltage of 2.35V, and discharge at a rate of 10 hours. The measured discharge capacity reaches 280Ah.

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Abstract

The invention discloses a repairing agent for a lead-acid storage battery and a preparation method thereof, and belongs to the technical field of repairing a storage battery. The preparation method comprises the following steps: adding a hydrogen evolution inhibitor into a sulfuric acid solution with a pH (Potential of Hydrogen) value of 4-6; stirring until the solution is transparent; adding high-conductivity nanometer carbon particles; and stirring until a semi-transparent suspension is formed, so as to obtain the repairing agent for the lead-acid storage battery. The preparation method provided by the invention has the advantages of simpleness and easiness in operation, low cost of raw materials and wide sources. According to the repairing agent for the lead-acid storage battery provided by the invention, the sulfation rate is reduced, the service life of the battery is prolonged, and the charging rate and the discharging rate of the battery can be improved simultaneously; and the using rate of active matters is improved, so that the battery capacity can be improved.

Description

technical field [0001] The invention relates to a lead-acid storage battery restoration agent and a preparation method thereof, belonging to the technical field of storage battery restoration. Background technique [0002] Lead-acid batteries have the advantages of low price, reliable performance and wide operating temperature range, and are widely used in various industries such as communications, electric power, and transportation. Valve-regulated sealed lead-acid batteries are widely used in power system substations in the power industry. In the event of an interruption of the external AC power supply, a reliable DC power supply can be continuously provided. In order to ensure timely and stable power supply, many batteries are often scrapped before their service life, resulting in a large waste of resources. Among them, the capacity drop caused by the irreversible sulfation of the negative electrode is the main reason for the battery to be scrapped. Lead-acid batteries...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/06
CPCH01M10/4235Y02E60/10
Inventor 汪的华朱华赵光金朱丽娜
Owner WUHAN UNIV
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