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Lead storage battery grid with composite coating and preparation method of lead storage battery grid

A lead-acid battery and composite coating technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as corrosion resistance, and achieve the effects of prolonging service life, enhancing protection performance, and ensuring contact conductivity

Active Publication Date: 2017-09-22
TIANNENG BATTERY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a lead storage battery grid with a composite coating on the surface, which solves the problem that the traditional lead alloy grid is not corrosion-resistant in the prior art

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Electrochemical pretreatment: use the grid as the anode, and the stainless steel sheet as the cathode, immerse in a mixed solution of 0.1mol / L sodium hydroxide and 0.05mol / L sodium phosphate, use constant current mode, and the current density is 3.5Adm -2 , the processing time is 120s.

[0037] (2) Preparation of lead dioxide layer by electrochemical oxidation method: the pretreated lead alloy grid is used as the anode, and the lead plate is used as the cathode. In a sulfuric acid solution with a concentration of 1.65mol / L, the composite frequency conversion carrier control technology is used for electrochemical oxidation. Oxidation, the control parameters are: the positive oxidation termination voltage is 70V, the negative termination voltage is 35V, the oxidation time is 1.5h, and the current density is 30A / dm 2 , the frequency is 300Hz, and the positive and negative duty cycles are 20% and 20%.

[0038] The thickness of the lead dioxide layer was 10 μm.

[0039...

Embodiment 2

[0047] (1) Electrochemical pretreatment: use the grid as the anode, and the stainless steel sheet as the cathode, immerse in the mixed solution of 0.1mol / L sodium hydroxide and 0.05mol / L sodium phosphate, adopt constant current mode, and the current density is 4.8Adm -2 , the processing time is 210s.

[0048] (2) Preparation of lead dioxide layer by electrochemical oxidation method: the pretreated lead alloy grid is used as the anode, and the lead plate is used as the cathode. In a sulfuric acid solution with a concentration of 1.74mol / L, the composite frequency conversion carrier control technology is used for electrochemical oxidation. Oxidation, the control parameters are: the positive oxidation termination voltage is 95V, the negative termination voltage is 50V, the oxidation time is 2h, and the current density is 35A / dm 2 , the frequency is 450Hz, the positive and negative duty ratios are 30% and 20%, and the thickness of the obtained lead dioxide layer is 15 μm.

[0049...

Embodiment 3

[0054] (1) Electrochemical pretreatment: use the grid as the anode, and the stainless steel sheet as the cathode, immerse in a mixed solution of 0.1mol / L sodium hydroxide and 0.05mol / L sodium phosphate, use constant current mode, and the current density is 5.5Adm -2 , the processing time is 260s.

[0055] (2) Preparation of lead dioxide layer by electrochemical oxidation method: the pretreated lead alloy grid is used as the anode, and the lead plate is used as the cathode. In a sulfuric acid solution with a concentration of 1.95mol / L, the composite frequency conversion carrier control technology is used for electrochemical oxidation. Oxidation, the control parameters are: positive oxidation termination voltage is 110V, negative termination voltage is 75V, oxidation time is 3h, current density is 40A / dm 2 , the frequency is 600Hz, and the positive and negative duty cycles are 40% and 20%.

[0056] The thickness of the lead dioxide layer was 17 μm.

[0057] (3) Cathodic deposi...

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Abstract

The invention discloses a lead storage battery grid with a composite coating and a preparation method of the lead storage battery grid and belongs to the field of chemical power sources and composites. The preparation method comprises the steps of pretreatment, electrochemical oxidation and cathode electrodeposition. According to the lead storage battery grid with the composite coating and the preparation method of the lead storage battery grid, a lead alloy grid serves as a substrate, a compact lead dioxide oxidation film is formed on the surface of lead alloy through an electrochemical oxidation method, metallurgy level combination is achieved between the film layer and the substrate, contact electroconductivity of the grid is fully ensured, and the protection performance of the lead alloy substrate is also enhanced effectively. Then titanium oxide is deposited on the surface of the lead dioxide oxidation film through a cathode electrodeposition method. On the one hand, holes of the oxidation film are filled with part of titanium oxide, so that compactness of the lead dioxide oxidation film is enhanced; and one the other hand, the titanium oxide has good electrochemical performance, so that the comprehensive performance of the composite grid is promoted. Through the composite coating prepared on the surface of the lead alloy grid, on the premise that the electroconductivity of the grid is ensured, corrosion resistance of the grid is improved substantially, and service life of the grid is prolonged.

Description

technical field [0001] The invention relates to the fields of chemical power sources and composite materials, in particular to a lead storage battery grid with a composite coating and a preparation method thereof. Background technique [0002] With its excellent performance and comprehensive advantages, lead-acid batteries dominate the world's battery industry. The grid is an important part of the lead-acid battery. It is the carrier and conductor of the active material of the lead-acid battery. The positive and negative active materials are supported by the grid. External electrical energy is conducted through the grid. Traditional lead-acid batteries generally use lead-antimony alloy and lead-calcium alloy grids. When the positive grid is charged, it will be oxidized, resulting in low specific energy and short life of the lead-acid battery. It can be seen that the alloy of the grid Corrosion directly affects the service life of the battery. Therefore, the development of...

Claims

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Application Information

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IPC IPC(8): C25D11/34C25D9/08H01M4/66H01M4/73
CPCC25D9/08C25D11/34H01M4/66H01M4/667H01M4/73Y02E60/10
Inventor 郭志刚郭泉忠杜克勤郭兴华
Owner TIANNENG BATTERY GROUP
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