Negative plate of lead-carbon battery

A lead-carbon battery and negative electrode technology, applied in lead-acid battery electrodes, battery electrodes, circuits, etc., can solve the problems of large differences in battery performance, complex production processes, and difficult industrialized production, and can alleviate the phenomenon of sulfation. Application prospects and the effect of improving utilization

Active Publication Date: 2013-01-02
ZHEJIANG NARADA POWER SOURCE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patents 200910183503.6 and 200910212792.8 disclose a method for making the negative electrode of a lead-carbon super battery. Lead powder and activated carbon are coated on different areas of the substrate to make electrodes, which improves its specific energy and obtains a higher deep cycle service life. , but the production cost is higher;
[0005] Chinese patent 201010608794.1 discloses a lead-carbon composite material, in which lead is deposited inside and between activated carbon particles by electrodeposition to achieve uniform mixing between lead and activated carbon particles and obtain a higher specific capacitance, but The production process is complex and difficult to industrialize production;
[0006] 200910098917.9 discloses a lead-carbon battery plate. Activated carbon is added to the lead-acid battery negative plate to obtain high specific power, good low-temperature discharge performance and high deep cycle life. Chinese patent 201010609372.6 discloses a Lead paste for negative electrode of lead-carbon battery, the lead-carbon composite material prepared by electrodeposition is mixed with paste through dry mixing and wet mixing methods, which enhances the bonding force between lead powder and carbon material, but different types of activated carbon have different physical properties and different The physical properties of activated carbon and lead paste are mixed to improve the utilization rate of active materials in different degrees, so the battery performance varies greatly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.037Kg and the specific surface is 1801m 2 / g, the ratio of micropores to mesopores is 60:40, and the pore volume is 0.924cm 3 / g, particle size (D50) is 4.0μm, conductivity 0.08S · cm activated carbon, then weigh 30Kg lead powder, 0.06Kg carbon black, 0.18Kg barium sulfate, 0.045Kg sodium lignosulfonate, 0.09Kg humic acid Acid, 0.02Kg of short fibers for dry mixing and mixing, adding 4.2Kg of water for wet mixing, and then adding 2.4Kg with a density of 1.4g / cm 3 sulfuric acid, and finally the prepared lead paste was coated on the lead-calcium alloy substrate and cured and dried for 24 hours at 65°C and 80% humidity.

[0024] The resulting plate is externalized, then covered with a U-shaped separator and two pieces of externalized PbO 2 For the positive electrode, 1.3g / cm 3 Sulfuric acid is used as the electrolyte to assemble lead-carbon batteries.

[0025] Discharge at a rate of 0.1C to 50% state of charge, then discharge at a rate of 2C for 60s, rest for 1...

Embodiment 2

[0027] Weigh 0.9Kg and the specific surface is 1462m 2 / g, the ratio of micropores to mesopores is 10:90, and the pore volume is 0.776cm 3 / g, particle diameter (D50) is 10.0 μ m, the gac of electrical conductivity 0.29S cm, and all the other prescriptions are prepared into lead carbon negative pole plate by the method for embodiment 1.

[0028] The resulting plate is externalized, then covered with a U-shaped separator and two pieces of externalized PbO 2 For the positive electrode, 1.3g / cm 3 Sulfuric acid is used as the electrolyte to assemble lead-carbon batteries.

[0029] Discharge at a rate of 0.1C to 50% state of charge, then discharge at a rate of 2C for 60s, rest for 10s, charge at a lower limit voltage of 2.4V at a rate of 2C for 90s, and the number of cycles can reach 11297 times.

Embodiment 3

[0031] Weigh 0.6Kg and the specific surface is 2826m 2 / g, the ratio of micropores to mesopores is 20:80, and the pore volume is 1.662cm 3 / g, particle diameter (D50) is 16.3 μ m, the gac of conductivity 0.34 S cm, and all the other prescriptions are prepared into lead carbon negative pole plate by the method for embodiment 1.

[0032] The obtained pole plate is externalized, then coated with a U-shaped separator and two pieces of externalized PbO2 is the positive electrode, 1.3g / cm 3 Sulfuric acid is used as the electrolyte to assemble lead-carbon batteries.

[0033] Discharge at a rate of 0.1C to 50% state of charge, then discharge at a rate of 2C for 60s, rest for 10s, charge at a lower limit voltage of 2.4V at a rate of 2C for 90s, and the number of cycles can reach 18442 times.

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PUM

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Abstract

The invention discloses a negative plate of a lead-carbon battery and a preparation method thereof. The negative plate consists of lead powder, active carbon, carbon black, barium sulfate, sodium lignosulfonate, humic acid, short fiber and sulfuric acid. The battery prepared by the negative plate has the advantages that the charging acceptance can be effectively improved, the sulfation phenomenon of the negative electrode under high-rate partial state of charge (HRPSoC) is effectively relieved, the times of 2C charge-discharge rate circulation (3%DOD) under 50% state of charge can reach 18442, and compared with the traditional lead-acid storage battery, the cycle life can be prolonged by more than two times.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a lead-carbon battery negative electrode plate. Background technique [0002] With the progress of society and the rapid development of economy, resources and energy are increasingly scarce, and the ecological environment is deteriorating. Energy problems and environmental crises have become two major challenges facing human society. Human beings are more dependent on clean and sustainable energy such as solar energy, wind energy, and hydrogen renewable energy. Lead-acid batteries used in energy storage systems and electric vehicle power drive systems are widely used due to their advantages such as good reliability, high cost performance, and recyclability. [0003] In the case of high-rate partial charge state (HRPSoC) discharge of lead-acid batteries, due to the diffusion limitation of sulfate ions, a dense layer of lead sulfate is formed on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/14H01M4/62
CPCY02E60/126Y02E60/10
Inventor 孔德帅丁平吴贤章陈建相佳媛
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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