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A high-life composite grid suitable for lead-acid batteries and its preparation method

A technology of lead-acid batteries and composite boards, applied to battery electrodes, circuits, electrolytic coatings, etc., can solve problems such as short life and corrosion resistance, and achieve the effects of improving battery life, prolonging service life, and reducing maintenance costs

Active Publication Date: 2020-09-01
TIANNENG BATTERY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a high-life composite grid suitable for lead-acid batteries, which solves the defects of traditional lead alloy grids such as poor corrosion resistance and short service life.

Method used

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  • A high-life composite grid suitable for lead-acid batteries and its preparation method
  • A high-life composite grid suitable for lead-acid batteries and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (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 100s.

[0030] (2) Micro-arc oxidation: use the grid obtained in the previous step as the anode, and the lead plate as the cathode, and immerse it in a mixed solution of 1.6mol / L sulfuric acid and 0.9mol / L phosphoric acid, and use the composite pulse control method to carry out micro-arc oxidation. Its control parameters are: the positive oxidation termination voltage is 50V, the negative termination voltage is 45V, the oxidation time is 10min, and the current density is 2.5A / dm 2 , the frequency is 300Hz, the positive duty cycle is 30%, and the negative duty cycle is 15%.

[0031] (3) Post-treatment: the grid after the oxidation in the previous step is washed with alkali, washed with wate...

Embodiment 2

[0038] (1) Electrochemical pretreatment: use the grid as the anode and the stainless steel sheet as the cathode, immerse in a mixed solution of 0.2mol / L sodium hydroxide and 0.05mol / L sodium phosphate, use constant current mode, and the current density is 4Adm -2 , the processing time is 80s.

[0039] (2) Micro-arc oxidation: the grid obtained in the previous step is used as the anode, and the lead plate is used as the cathode. In a mixed solution of 1.8mol / L sulfuric acid and 1.1mol / L phosphoric acid, the compound pulse control method is used to carry out micro-arc oxidation. The control parameters are: the positive oxidation termination voltage is 80V, the negative termination voltage is 60V, the oxidation time is 20min, and the current density is 3.7A / dm 2, the frequency is 500Hz, the positive duty cycle is 40%, and the negative duty cycle is 30%.

[0040] (3) Post-treatment: the grid after the oxidation in the previous step is washed with alkali, washed with water to neut...

Embodiment 3

[0044] (1) Electrochemical pretreatment: use the grid as the anode, and the stainless steel sheet as the cathode, immerse in a mixed solution of 0.5mol / L sodium hydroxide and 0.01mol / L sodium phosphate, use constant current mode, and the current density is 5.5Adm -2 , the processing time is 30s.

[0045] (2) Micro-arc oxidation: the grid obtained in the previous step is used as an anode, and the lead plate is used as a cathode. In a mixed solution of 2.0mol / L sulfuric acid and 1.3mol / L phosphoric acid, the composite pulse control method is used to carry out micro-arc oxidation. The control parameters are: the positive oxidation termination voltage is 95V, the negative termination voltage is 75V, the oxidation time is 30min, and the current density is 4.2A / dm 2 , the frequency is 700Hz, the positive duty cycle is 50%, and the negative duty cycle is 30%.

[0046] (3) Post-treatment: the grid after the oxidation in the previous step is washed with alkali, washed with water to ne...

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Abstract

The invention discloses a high-life composite grid suitable for a lead storage battery and a preparation method of the high-life composite grid and belongs to the technical field of preparation of lead storage batteries. According to the high-life composite grid, a lead alloy grid is taken as a base material, and a compact micro-arc anodic oxide film is formed on the base material in situ by adopting a composite pulse oxidation technology in a mixed acid solution. The thickness of the micro-arc anodic oxide film is 5-20 microns, the main ingredient is lead dioxide, and metallurgical grade bonding between the film and a matrix is achieved, so that the contact conductivity of the grid is fully ensured, the protective performance of the lead alloy matrix is effectively strengthened, the service life of the grid is greatly prolonged and the maintenance cost of the lead storage battery is reduced. The composite grid disclosed by the invention is applied to the lead storage battery, so thatthe corrosion weight loss of a positive grid during the period of normal-temperature cycle life is smaller than 60% and the life of the battery is prolonged by over 15%.

Description

technical field [0001] The invention relates to the technical field of lead storage battery preparation, in particular to a high-life composite grid suitable for lead storage batteries and a preparation method thereof. Background technique [0002] With its excellent performance and comprehensive advantages, lead-acid batteries dominate the world's battery industry. In terms of electric vehicles, hybrid vehicles, wind power, solar cells, and electric energy storage batteries, lead-acid batteries are still listed as the preferred power source and irreplaceable power battery. [0003] 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. The positive grid is easily oxidized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/68H01M4/82C25D11/34
CPCC25D11/026C25D11/34H01M4/667H01M4/685H01M4/82Y02E60/10
Inventor 郭志刚杜克勤郭泉忠郭兴华
Owner TIANNENG BATTERY GROUP
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