Treatment method of positive grid of lead-acid accumulator

A technology of lead-acid storage battery and processing method, which is applied in metal material coating process, fusion spraying, coating, etc., can solve the problems such as the interface between the grid and the active material is not good, and achieve shortening of sulfation time, Improved cycle life and good bonding effects

Inactive Publication Date: 2012-01-04
江苏贝思特动力电源有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, there is no good method on how to modify the interface between the grid and the active material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] 1. Rectify the spray gun, extend the length of the suction pipe, and pass it with 40-50kPa of compressed nitrogen.

[0008] 2. Melt pure tin in a melting pot with a temperature set at 300°C; at the same time, hang the lead alloy positive grid in a drying tunnel with a temperature set at 250°C for heating.

[0009] 3. Insert the rectified paint spray gun suction pipe into the molten tin in the melting pot, and use nitrogen pressure to spray the molten tin liquid on the surface of the hot grid flowing out of the drying tunnel. In order to speed up, multiple spray guns can be sprayed at the same time.

[0010] 4. After spraying molten tin on both sides of the grid, cool it down to room temperature naturally.

[0011] In order to prevent the oxidation of molten tin, the operation room of the above-mentioned whole process should be sealed as much as possible to avoid air circulation in the operating environment.

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Abstract

The invention provides a treatment method of a positive grid of a lead-acid accumulator and relates to manufacturing of lead-acid accumulators. The treatment method comprises the following steps: heating the positive grid of the lead-acid accumulator to the temperature of 200 DEG C-250 DEG C; then spraying pure tin which is melted at the temperature of 250 DEG C-300 DEG C on the surface of the grid by using 40-50 kPa of compressed nitrogen; and after the double surfaces of the grid are sprayed, naturally cooling. According to the treatment method provided by the invention, a thin layer of pure tin is formed on the surface of the grid after treatment, so that the sulfuric acid salinization time of the grid is greatly shortened, the grid can be well jointed with an active substance, and thecycle service life of the accumulator is improved.

Description

technical field [0001] The invention relates to a method for processing the positive electrode grid of a lead-acid storage battery, belonging to the field of lead-acid storage battery production. Background technique [0002] Lead-acid battery occupies a pivotal position in the field of secondary batteries by virtue of its excellent performance-price ratio. In all aqueous solution power supply systems, lead-acid batteries have higher working voltage, better high-current discharge performance and high-low temperature discharge performance, and it is suitable for both floating charge and starting and cycle use, so Lead-acid batteries are widely used in fields such as backup power, energy storage and power supply. [0003] Although valve-regulated sealed lead-acid battery (VRLA battery) technology has become increasingly mature, there are still many problems in VRLA battery. The softening and shedding of the active material is a common failure mode in VRLA batteries, which af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/12C23C4/123
Inventor 陆亚山钱存萍
Owner 江苏贝思特动力电源有限公司
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