Electroplating method for thin lead coating on carbon grid of lead-carbon battery

Abstract

A method for electroplating a thin lead coating on a carbon grid of a lead-carbon battery, comprising the following steps: filling a mixed carbon slurry into a forming mold to obtain a carbon grid; sequentially performing degreasing operations on the carbon grid; High-temperature baking operation; roughening operations on carbon grids in sequence; using SnCl 2 solution to sensitize the carbon grid; using PdCl 2 The solution activates the carbon grid; the carbon grid is placed in the copper plating solution for copper plating to form a substrate copper layer on the surface of the carbon grid; the carbon grid is placed in the lead plating solution for Lead plating is performed to form a thin lead plating on the surface of the copper layer of the substrate. The substrate copper layer not only has good adhesion to the surface of the carbon grid, but also has a strong binding ability with the electroplated lead layer, which can form an electroplated lead layer on the surface of the carbon grid, thereby enabling the carbon grid to bond with tin The paste has higher affinity, and the carbon grid has better mechanical properties through the coating of the copper and lead coatings on the carbon grid.

Description

technical field [0001] The invention relates to the technical field of lead-carbon batteries, in particular to an electroplating method for a thin lead coating on a carbon grid of a lead-carbon battery. Background technique [0002] At present, the electrodes of lead-acid batteries are mainly made of lead and its oxides, and the electrolyte is a battery of sulfuric acid solution. Since the invention of lead-acid batteries by the Frenchman Plante in 1859, lead-acid batteries have experienced more than 150 years of development. Lead-acid batteries have low cost, long life, good safety performance, and the recycling rate of waste batteries is as high as 95%. Therefore, it has always been the most widely used product in the battery field. [0003] With the rapid development of electric vehicles and electric bicycles, a new battery based on lead-carbon technology has gradually emerged, that is, lead-carbon batteries. This battery adds activated carbon as a buffer material to the...

AI Technical Summary

Problems solved by technology

[0004] For the negative carbon grid of traditional lead-carbon batteries, it is made of various materials such as graphite, silicon, titanium and cellulose after pressing and sintering. The lead paste is built into the negative carbon grid, and its main material is graphite. , compared with traditional lead-acid batteries using lead or lead alloy negative grids, it can indeed reduce the use of heavy metal lead, but the traditional negative carbon grid is obtained by pressing and sintering the main material of graphite, which is greatly affected When impacted by an external force, it is easy to be damaged due to the hard and brittle characteristics, and there is a problem of poor mechanical properties

[0005] Furthermore, the surface of the traditional carbon grid is mainly carbon elements. When the solder paste is filled in the carbon grid, the affinity between the solder paste and the surface of the carbon grid is much lower than that of the solder paste and the lead grid or the lead alloy plate. grid affinity, leading to a decline in the electrical performance of lead-carbon batteries

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