A kind of lead storage battery positive plate lead paste formula

A technology for lead-acid batteries and positive plates, which is applied in lead-acid batteries, battery electrodes, secondary batteries, etc., and can solve problems such as the rare application of carbon fiber, the limitation of battery charging acceptance capacity, and insufficient research

Active Publication Date: 2021-06-29
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the application of carbon fiber as a positive electrode paste additive is relatively rare
The main reason is that the sulfation mainly occurs at the negative electrode, and the charge acceptance capacity of the battery is mainly limited by the negative electrode due to the specific surface area of ​​the active material. The research on the addition of carbon materials to the positive electrode paste is not deep enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] For every 100kg of lead powder, add 9.8kg of sulfuric acid with a specific gravity of 1.40g / ml, 12.8kg of pure water, 0.10kg of short fibers, 1.0kg of silica sol with a mass concentration of 40%, an average diameter of primary particles of 30nm, and a carbon content of more than 93%. , 0.25 kg of carbon fiber with a tensile strength of 3200 MPa and a porosity of 0.93%, and some spare pure water for adjustment, and the apparent specific gravity of the lead paste is controlled at 4.20±0.10g / ml.

Embodiment 2

[0021] In every 100kg of lead powder, add 9.8kg of sulfuric acid with a specific gravity of 1.40g / ml, 12.8kg of pure water, 0.10 kg of short fiber, 2.0kg of silica sol with a mass concentration of 30%, and an average primary particle diameter of 13nm, with a carbon content of 93%, 0.20 kg of carbon fiber with a tensile strength of 3200 MPa and a porosity of 0.93%, and some spare pure water for adjustment, and the apparent specific gravity of the lead paste is controlled at 4.20±0.10g / ml.

Embodiment 3

[0023] In every 100kg of lead powder, add 9.8kg of sulfuric acid with a specific gravity of 1.40g / ml, 12.8kg of pure water, 0.10 kg of short fiber, 3.0kg of silica sol with a mass concentration of 30%, an average diameter of primary particles of 13nm, and a carbon content of 93%. 0.15 kg of carbon fiber with a tensile strength of 3200 MPa and a porosity of 0.93%, and some spare pure water for adjustment, and the apparent specific gravity of the lead paste is controlled at 4.20±0.10g / ml.

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Abstract

The invention discloses a lead paste formula for a positive plate of a lead storage battery, which includes lead powder and additives, the additives include silica sol and carbon fiber, the addition of the silica sol is 1.0% to 5.0% of the weight of the lead powder, the carbon fiber The amount added is 0.05% to 0.25% of the weight of the lead powder. The formula of the lead paste for the positive plate of the lead storage battery of the present invention is by adding silica sol and carbon fiber as additives in the positive electrode paste, the addition of the silica sol is 1.0% to 5.0% of the weight of the lead powder, and the addition of the carbon fiber is 1% of the weight of the lead powder. 0.05% to 0.25%, can greatly improve the mechanical strength and charge receiving capacity of the positive electrode paste, protect the positive electrode paste crystal from softening during the cycle to the greatest extent, and significantly improve the cycle performance of the lead-acid battery.

Description

technical field [0001] The invention relates to the technical field of lead storage battery production, in particular to a formula of lead paste for the positive plate of the lead storage battery. Background technique [0002] When the lead-acid battery is recycled, one of the main failure modes is the softening and falling off of the positive electrode paste. The essence is the deterioration of the lead paste crystal, which leads to the softening and falling off of the lead paste and the failure of the battery capacity. Therefore, how to improve the mechanical strength of the positive lead paste and delay the degradation rate of the positive lead paste crystals during recycling is the key to improving the cycle life of the lead-acid battery. [0003] The synthesis of lead paste is a very critical process in the manufacturing process of lead-acid batteries. It is a paste made by mixing (stirring) lead powder, pure water, dilute sulfuric acid solution, and various additives. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/57H01M4/62H01M10/06H01M10/42
CPCH01M4/362H01M4/57H01M4/625H01M4/628H01M10/06H01M10/4235Y02E60/10
Inventor 刘克宇韩峰方明学庄建王超
Owner TIANNENG BATTERY GROUP
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