Negative lead paste and electrolyte additives for reducing sulfation of lead-acid batteries

A lead-acid battery, negative electrode lead paste technology, applied in lead-acid batteries, battery electrodes, acid electrolytes, etc., can solve the problem of easy formation of recrystallization, and achieve the effect of preventing crystal growth, wide source, and reducing salinization

Inactive Publication Date: 2019-01-18
SHUANGDENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the negative problems such as easy formation of recrystallization in the charging and discharging process of the prior art products, and proposes a negative electrode lead paste and an

Method used

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  • Negative lead paste and electrolyte additives for reducing sulfation of lead-acid batteries
  • Negative lead paste and electrolyte additives for reducing sulfation of lead-acid batteries
  • Negative lead paste and electrolyte additives for reducing sulfation of lead-acid batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment uses conventional negative lead paste, which contains 8.5% of sulfuric acid, 8% of pure water, 0.05% of short fiber, 0.2% of carbon black, 0.4% of lignin, and 1.0% of barium sulfate measured by mass percentage. Benzyl benzoate 0.5%, the balance is lead powder. 100% DOD cycle life comparison test is carried out between the products made of this component and the products of the same specifications in the existing technology, and the specific performance curves are shown in figure 1 .

Embodiment 2

[0020] The present embodiment uses conventional negative lead paste, which contains 9% sulfuric acid, 7% pure water, 0.4% short fiber, 0.1% carbon black, 0.3% lignin, 0.8% barium sulfate, and the balance is lead powder. However, 0.5% benzyl benzoate is added to the supporting electrolyte, and the product made with this component is compared with the product of the same specification in the prior art for a 100% DOD cycle life comparison test. The specific performance curve is shown in figure 2 .

Embodiment 3

[0022] The present embodiment uses conventional negative electrode lead paste, which contains 9% of sulfuric acid, 10% of pure water, 0.7% of short fibers, 0.3% of carbon black, 0.1% of lignin, 0.2% of barium sulfate, and the balance is lead powder. , however, adding EDTA-Na 2 0.6%, the product made with this component and the product of the same specification in the existing technology are subjected to a 100% DOD cycle life comparison test, and the specific performance curve is shown in image 3 .

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PUM

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Abstract

The invention discloses a negative lead paste and electrolyte additives for reducing sulfation of lead-acid batteries, wherein the additional components are metered and added according to the mass percentage. 0.5 to 0.7 percent of benzyl benzoate is added into that negative electrode lead paste on the basis of maintaining the conventional components, and EDTA-Na2 can be added or not added in the matching electrolyte.. Alternatively, no benzyl benzoate can be added to the negative electrode paste, so the electrolyte must be mixed with one of benzyl benzoate and EDTA-Na2.. The addition of benzylbenzoate inhibits the recrystallization of lead sulfate and prevents the crystal growth. Adding EDTA-Na2 to the electrolyte to improve the activity of the built-in active substances, is conducive tothe decomposition of lead sulfate crystals, so as to enhance the conductivity, enhance the battery charge acceptance, play a role in reducing sulfation of lead acid battery, and achieve the purpose ofimproving the battery cycle life.

Description

technical field [0001] The invention belongs to a technical solution in the technical field of lead-acid batteries, and relates to a negative electrode paste and an additional component of an electrolyte for reducing the sulfation of lead-acid batteries. Background technique [0002] When the lead-acid battery is charged and discharged, an electrochemical reaction first occurs between the negative plate and the contact interface of the lead paste. If the supporting charge and discharge control logic design is not reasonable, it is easy to form a high-impedance passivation layer on the contact interface. The main component of the chemical layer is lead sulfate with very poor conductivity. With the increase of the discharge time and times of the lead-acid battery, the fine-grained lead sulfate first recrystallizes on the contact interface, and then gradually gathers into coarse grains until a dense passivation layer is formed. The passivation layer has poor solubility in the ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/08H01M4/36H01M4/57H01M10/06H01M10/42
CPCH01M4/364H01M4/57H01M4/628H01M10/06H01M10/08H01M10/4235H01M2300/0011Y02E60/10
Inventor 董庆亮孙中五杨宝峰楼志强
Owner SHUANGDENG GRP
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