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Method for conducting cold rolling on lead-acid storage battery grid gradually

A lead-acid battery, progressive technology, applied in the direction of metal rolling, etc., can solve the problems of battery electrochemical performance decline, poor grid corrosion resistance, etc., to increase the grain boundary volume fraction, improve electrical conductivity and corrosion resistance , Eliminate the effect of grid pores

Inactive Publication Date: 2015-11-11
DAYING JUNLI POWER SOURCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for progressively cold-rolling lead-acid battery grids, which solves the problems of poor corrosion resistance of the grid and grid pores affecting the conduction of current, resulting in a decrease in the electrochemical performance of the battery

Method used

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  • Method for conducting cold rolling on lead-acid storage battery grid gradually
  • Method for conducting cold rolling on lead-acid storage battery grid gradually
  • Method for conducting cold rolling on lead-acid storage battery grid gradually

Examples

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Effect test

Embodiment 1

[0014] Four-stage cold rolling technology to process 60Ah automotive battery grid. The first stage is compressed to 95% of the original thickness, the second stage is compressed to 85% of the original thickness, the third stage is compressed to 75% of the original thickness, and the fourth stage is compressed to 60% of the original thickness. The results show that the cycle life of the battery prepared without cold-rolling can reach 250 times; the battery prepared after cold-rolling the grid can reach 350 times.

Embodiment 2

[0016] Three-stage cold rolling technology processing 5Ah motorcycle battery grid. The first stage is compressed to 95% of the original thickness, the second stage is compressed to 85% of the original thickness, and the third stage is compressed to 80% of the original thickness. The results show that the cycle life of the battery prepared without cold-rolling can reach 350 times; the battery prepared after cold-rolling the grid can reach 500 times.

Embodiment 3

[0018] Three-stage alloy cold-rolled 69Ah start-stop battery grid and three-stage cold-rolled grid comparison test. The technology adopted by the former is three times cold-rolled lead-based alloy, and then expanded and deformed into a grid lead strip, and finally made into a grid with a thickness of 1.2mm; the technical points adopted by the latter are as follows, the first stage is compressed to 95% of the original thickness , the second stage is compressed to 85% of the original thickness, the third stage is compressed to 80% of the original thickness, and finally a grid with a thickness of 1.2mm is made. The results show that the 69Ah start-stop battery grid prepared by the three-stage alloy cold rolling method has a few bubbles, and there are different thicknesses at different positions; while the grid obtained by the three-stage cold rolling method has no bubbles and is very uniform, and the prepared battery , can achieve 50,000 times of start and stop, which is signific...

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Abstract

The invention discloses a method for conducting cold rolling on a lead-acid storage battery grid gradually. A multi-stage gradual manner is adopted for conducting cold rolling on the grid, the number of cold rolling stages is 2 to 8, the compression amount of each stage tends to be increased and then decreased, the compression amount of the head stage and the compression amount of the tail stage do not exceed 8%, and the total compression amount is 5% to 50%. By the adoption of the method, cold rolling is conducted on the grid, a material grain boundary structure is optimized, the volume fractions of special grain boundaries in materials are increased, the toughness performance of the materials is improved, and corrosion resistance is improved. Through cold rolling of the grid, air holes of the grid are eliminated, and the electric conductive capacity and the corrosion resistance of the grid are improved. The gradual grid cold rolling technology is adopted, forces of different magnitudes are adopted for rolling the grid sequentially, the force degree is changed from small to large, and the evenness of the grid is improved.

Description

technical field [0001] The invention belongs to the field of accumulators, and in particular relates to a method for progressively cold-rolling lead-acid accumulator grids. Background technique [0002] Pb-Ca-Sn-Al alloy is a traditional alloy used to make anode grids of maintenance-free lead-acid batteries. Due to the poor resistance to grain boundary corrosion of this alloy under battery conditions, the charge-discharge cycle life of lead-acid batteries is only 200 times or so. However, the current research on grid corrosion resistance mainly focuses on grid alloy additives. Recently, a small number of researchers have begun to study alloy cold-rolled remanufactured grids. Be as publication number: the Chinese patent application of CN1775962A discloses a kind of method that improves the corrosion resistance of lead-acid storage battery grid, and it adopts cold-rolling processing lead-based alloy raw material to make grid lead belt, then makes grid, the result It is show...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/00
Inventor 王远强刘文俊胡遵富赵春林
Owner DAYING JUNLI POWER SOURCE TECH
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