On-line pretreatment method of lead screen grid on plate coating line

Abstract

The invention relates to an on-line pretreatment method of a lead screen grid on a plate coating line. The pretreatment method of the lead screen grid comprises four steps of soldering flux spraying, on-line blow-drying, soldering flux spraying and lead wire surface soldering flux protection. The first pretreatment method comprises the step of soldering flux spraying: spraying soldering flux in a central gap of a lead net running on a plate coating line by adopting an acid-resistant pump, and controlling a proper flow and spraying width to ensure that the soldering flux is sprayed in the central gap of the lead net so as to remove surface oxides of a lead wire in the central gap of the lead net. According to the on-line pretreatment method of the lead screen grid on the plate coating line, due to the adoption of the on-line center gap pretreatment method of the plate coating line, a lead wire glass fiber inner core cannot absorb the soldering flux and can be air-dried in time, and the phenomena of pseudo soldering, corrosion of a cast-weld mold, incapability of demolding and the like which often occur in an existing pretreatment method before cast-weld of a horizontal battery are avoided; and therefore, the product quality can be greatly improved, the equipment mold loss is reduced, and the labor intensity of workers is reduced.

Description

technical field [0001] The invention relates to the technical field of lead grids, in particular to an online pretreatment method of lead grids on a coating line. Background technique [0002] The lead mesh grid is the main component of the lead-acid battery. It is the current collector skeleton of the electrode, which plays the role of conduction, collecting current and making the current distribution uniform. At the same time, it supports the active material and is the carrier of the active material. [0003] When a horizontal bipolar battery lead grid is used as a terminal plate, after the normal coating, pickling, curing and drying processes of the lead grid, the central gap area of ​​the lead grid plate that is not coated with active material The lead wire has been severely oxidized. If the lead wire in this area is not deoxidized, it will often cause false welding between the terminal wire and the external terminal and the bus bar, which will seriously affect the quali...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an online pretreatment method of the lead grid grid on the coating line, which has the advantages of reducing the loss of equipment and molds, and solves the problem of the need for the entire battery terminal line cluster to be dipped in flux together. , while the glass fiber core of the lead wire will directly absorb the flux, and the flux has a certain degree of corrosiveness. When the terminal and the bus bar are cast and welded, a small explosion will be formed around the lead wire due to high temperature and liquid, and a virtual welding hole will be formed around the lead wire, which seriously affects the quality of the battery casting and welding, and because the flux is a corrosive liquid, the flux residue It will damage the casting mold, and the residual flux will also cause difficulty in casting and demoulding, which will easily cause the lead wire of the battery casting and welding to break away from the bus bar or damage the mold, affecting the quality of the battery and increasing the production cost of casting and welding

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