Aluminium-based light-type grid for plumbic acid cells and preparation method thereof

A lead-acid battery and lightweight plate technology, applied in the direction of lead-acid battery electrodes, electrode manufacturing, battery electrodes, etc., can solve the problems of difficulty in obtaining lead coatings with uniform thickness, many pretreatment steps, and unfavorable practical applications. And the effect of controllable thickness, light weight and small deformation

Inactive Publication Date: 2012-01-11
长沙灿能能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method saves the step of pre-plating transition layer, the required pre-treatment steps are many and complicated, and only pure lead coating can be obtained, which is not conducive to its practical application.
And the aluminum grid of the present invention is porous, and the method for electroplating is difficult to obtain uniform thickness, covers the complete lead coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The porous aluminum (≥99.9wt.%) material is cut into grid substrates, soaked in 0.1% NaOH solution for 30 minutes, washed with clean water and then dried. Immerse the porous aluminum substrate in PbCl at 550 °C 2 (50wt.%)+NaCl(30wt.%)+CaCl 2(19wt.%)+CuCl 2 (1wt.%) in the melt for 300s. Lift out the substrate, immediately immerse it in the Pb-Sb (5wt.%) melt at 550°C for 20s, repeat twice. The sample was heat-treated at 100°C for 5 hours to obtain a porous aluminum-based lightweight grid coated with a Pb-Sb (5wt.%) alloy protective layer on the surface.

Embodiment 2

[0032] The core is a dense metal sandwich structure composite porous Al-Sn (3wt.%) alloy material, cut into a grid matrix, soaked in 7% NaOH solution for 15min, washed with water and dried. Immerse in PbCl at 350°C 2 (78wt.%)+NaCl(5wt.%)+CaCl 2 (8wt.%)+AgCl (9wt.%) melt for 30s. Lift out the substrate, immediately immerse it in the Pb-Ca(1wt.%)-Sn(2wt.%) melt at 340°C for 5s, and repeat it 5 times. After the metal bath operation was completed, the sample was heat-treated at 200°C for 2.5h to obtain a sandwich structure composite porous Al-Sn (3wt.%) coated with a Pb-Ca(1wt.%)-Sn(2wt.%) alloy protective layer on the surface. ) Alloy-based lightweight grid.

Embodiment 3

[0034] Cut a layered structure composite porous Al-Cu(0.3wt.%)-Si(5wt.%) alloy material with dense metal on one side and porous metal on the other side into a grid matrix, and soak in 10% NaOH solution for 2min , wash with water and dry. The composite porous aluminum substrate was immersed in PbCl at 500 °C 2 (90wt.%)+NaCl(5wt.%)+CaCl 2 (5wt.%) in the melt for 100s. The substrate was raised and immediately immersed in the Pb-Ca(0.8wt.%)-Sn(1wt.%)-Al(0.02wt.%)-Ce(0.01wt.%) melt at 400°C for 10s. After the metal bath operation was completed, the sample was heat-treated at 300°C for 30min to obtain ) Alloy protective layer layered structure composite porous Al-Cu(0.3wt.%)-Si(5wt.%) alloy-based lightweight grid.

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Abstract

The invention provides an aluminium-based light-type grid for plumbic acid cells and a preparation method thereof. The aluminium-based light-type grid comprises an open-cell porous aluminum or aluminium alloy (Al-Me) matrix with high specific surface area and a lead or lead alloy (Pb-Me') protective layer. The preparation technological flow of the protective layer mainly comprises four operationsof pretreatment, chemical plating of molten salt, metal bath and heat treatment. In comparison with traditional lead and lead alloy grids, the aluminium-based light-type grid prepared in the invention has high mechanical strength, good conductivity, large specific surface area, light weight and the like, and is used for positive and negative electrodes in plumbic acid cells so as to greatly reduce the weight of plumbic acid cells, improve the active substance utilization rate, specific energy, cycle life and seismic performance of plumbic acid cells, and minimize the internal resistance of cells. The preparation method provided by the invention is suitable for industrial application.

Description

technical field [0001] The invention discloses an aluminum-based light-duty grid for lead-acid batteries and a preparation method thereof, and relates to the fields of lead-acid batteries, chemical plating, composite materials, etc., and particularly relates to a high specific surface area porous aluminum and aluminum alloy light-duty grid and its preparation method. Surface lead coating preparation technology. Background technique [0002] Lead-acid batteries were first invented by Gasten Prandt in 1859 and have survived for more than 150 years. Due to its advantages in high-current discharge performance, float charge life, self-discharge, raw materials, recovery rate and economy, dozens of new batteries such as nickel-cadmium batteries, nickel-hydrogen batteries, and lithium-ion batteries have been listed one after another. In the middle of the year, it can still firmly occupy most of the market share. [0003] However, due to the shortcomings of low specific energy and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/73
CPCH01M4/14H01M4/667Y02E60/126H01M4/16H01M4/0452H01M4/0454H01M4/0485H01M4/82Y02E60/10
Inventor 蒋良兴郝科涛赖延清贾明关翔洪波于枭影刘业翔
Owner 长沙灿能能源科技有限公司
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