Lead-acid battery pole group casting welding neutral flux and preparation method thereof

Abstract

The invention relates to a lead-acid storage battery electrode group casting welding neutral flux and a preparation method thereof. The lead-acid battery electrode group casting welding neutral flux is composed of the following components in mass percentage: 30%-60% binary Carboxylic acid, 0.2%-1.0% wetting agent and the balance of solvent, wherein the solvent is selected from high-boiling organic solvents with a boiling point of 140°C-300°C and capable of dissolving dicarboxylic acids. The lead-acid battery electrode group casting welding neutral flux can achieve the effects of low corrosion, low residue, good welding bonding force and low porosity as a whole, and can significantly improve the welding reliability of the lead-acid battery electrode group.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a neutral flux for lead-acid battery electrode group casting and welding and a preparation method thereof. Background technique [0002] In the early 1990s, the casting and welding process of acid batteries has been applied in the assembly of lead-acid batteries in European and American automobiles. However, in the early days of my country's lead-acid battery industry, manual welding was generally used to weld the battery pole group busbars. [0003] Since 2009, frequent blood lead accidents in the lead-acid battery industry and the further environmental protection requirements of the Ministry of Environmental Protection for my country's lead-acid battery industry in 2011 have accelerated the pace of machine casting and welding instead of manual welding in the battery assembly process, making lead The serious pollution of lead fumes caused by manual welding in the acid battery a...

AI Technical Summary

Problems solved by technology

[0005] (1) The formula of conventional water-based flux is strongly acidic as a whole, which is extremely corrosive to molds and equipment;

[0006] (2) The formula of conventional water-based flux uses sodium hypophosphite and phosphorous acid, and the residues are likely to cause a short circuit between the positive and negative plates;

[0007] (3) The welding joint surface formed by conventional water-based flux has many pores, and the climbing welding is not obvious, which has an impact on battery life

[0008] In addition, in order to ensure the quality of lead-acid batteries, some domestic medium and large lead-acid battery manufacturers currently use imported flux, resulting in high production costs

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