Preparation method of graphene-lead grid alloy for plumbic acid cell

A lead-acid battery and graphene technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of lead-acid battery grid deformation, battery loss of positive electrode grid corrosion and fracture, lead-acid battery electrode active material softening and falling off, etc. , to achieve the effects of improving mechanical properties, enhancing creep resistance and reducing specific gravity

Inactive Publication Date: 2016-10-26
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the battery undergoes a 100% DOD cycle, the active material on the electrode plate of the lead-acid battery gradually changes into large lead sulfate particles during the discharge period, and the thickness of the plate increases, and the thickness of the plate becomes smaller during the subsequent charging process. This change in the process will lead to the deformation of the grid of the lead-acid battery, which will lead to the softening and falling off of the electrode active material of the lead-acid battery, and finally lead to the corrosion and fracture of the positive grid of the battery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a graphene lead grid alloy for lead-acid batteries, heating and melting 5 parts of potassium chloride powder, adding 95 parts of tungsten carbide particles with a particle size of 10 μm, stirring evenly, cooling the mixture and pulverizing the mixture into particle sizes Powder between 20-50 μm. Put 95 parts of lead powder with 1% tin and 0.1% aluminum by mass of lead powder on the bottom of the lead melting furnace, spread 5 parts of the mixture powder on the surface of the lead powder, and there is a part between the lead powder and the mixed powder blend. Cover the lead-melting furnace, raise the temperature to 700°C and maintain it for 1 hour, then stop heating and place the lead-melting furnace at room temperature, and let the temperature of the lead-melting furnace drop to room temperature within 0.5 hours. The graphene lead alloy can be obtained by scrubbing the surface of the graphene lead alloy with a brush to remove other metal impurit...

Embodiment 2

[0028] A preparation method of a graphene lead grid alloy for lead-acid batteries, heating and melting 8 parts of potassium chloride powder, adding 92 parts of polycarbonate particles with a particle diameter of 15 μm, stirring evenly, cooling the mixture and pulverizing the mixture into granules Powder with diameter between 10-30μm. Place 92 parts of lead powder with 0.1% calcium and 0.8% aluminum in the lead powder mass at the bottom of the lead melting furnace, spread 8 parts of the mixture powder on the surface of the lead powder, and there is a part between the lead powder and the mixed powder blend. Cover the lead-melting furnace, raise the temperature to 750°C and maintain it for 1.5 hours, then stop heating and place the lead-melting furnace at room temperature, and lower the temperature of the lead-melting furnace to room temperature within 0.3 hours. The graphene lead alloy can be obtained by scrubbing the surface of the graphene lead alloy with a brush to remove ot...

Embodiment 3

[0030] A preparation method of a graphene lead grid alloy for lead-acid batteries, heating and melting 4 parts of potassium chloride powder, adding 96 parts of polyethylene and polymethyl methacrylate mixed particles with a particle diameter of 10 μm, and stirring evenly After cooling, the mixture is pulverized into a powder with a particle size between 50-80 μm. Put 90 parts of lead powder with 1.2% tin and 0.15% aluminum in the lead powder mass on the bottom of the lead melting furnace, spread 10 parts of the mixture powder on the surface of the lead powder, and there is a part between the lead powder and the mixed powder blend. Cover the lead-melting furnace, raise the temperature to 650°C and maintain it for 1 hour, then stop heating and place the lead-melting furnace at room temperature, and lower the temperature of the lead-melting furnace to room temperature within 0.3 hours. The graphene lead alloy can be obtained by scrubbing the surface of the graphene lead alloy wi...

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Abstract

The invention discloses a preparation method of a graphene-lead grid alloy for a plumbic acid cell. The preparation method comprises selecting a metallic carbide or a solid carbonaceous organic compound, decomposing the metallic carbide or the solid carbonaceous organic compound at a high temperature to obtain a carbon source, feeding the carbon source into a lead solution at a high temperature so that atom-level bonding of carbon and lead is formed and carrying out cooling so that the graphene can be uniformly dispersed in the lead alloy. The preparation method can be carried out at the normal temperature under normal pressure so that a cost is greatly reduced. The graphene grid alloy improves grid alloy mechanical properties so that a creep resistance capability is improved. The graphene-lead grid alloy effectively reduces alloy specific gravity, improves alloy mechanical properties, improves alloy conductivity and electrochemical activity and improves grid resistance to corrosion.

Description

technical field [0001] The invention belongs to the technical field of lead-acid battery manufacturing, and in particular relates to a method for preparing a graphene-lead grid alloy for lead-acid batteries that reduces the specific weight of the grid alloy and improves its mechanical properties, electrical conductivity and corrosion resistance. Background technique [0002] Lead-acid batteries have a history of more than 150 years since they came out in 1859. Lead-acid batteries have been widely used because of their low cost and good safety performance. [0003] In the lead-acid battery, the grid is the skeleton of the battery, which plays a role of mechanical support, and at the same time, the grid also plays the role of transmitting current to various parts of the plate. However, when the battery undergoes a 100% DOD cycle, the active material on the electrode plate of the lead-acid battery gradually changes into large lead sulfate particles during the discharge period,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/68H01M4/73H01M4/82H01M4/84
CPCH01M4/663H01M4/666H01M4/685H01M4/73H01M4/82H01M4/84Y02E60/10
Inventor 石沫戴贵平吴亮柯娃
Owner CHAOWEI POWER CO LTD
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