Organic flux and preparation method thereof

Abstract

The invention discloses an organic flux and a preparation method thereof. The organic flux comprises 69% of methyl pyrrolidone component, 20% oxalic acid, 10% of glutaric acid component, 5% of rapid penetrant component, and 5% of fast dispersing agent component. The organic soldering flux prepared by the preparation method and used for welding the battery is characterized in that the voltage cannot be reduced after electrolyte is added, and moreover, the organic soldering flux also has the beneficial effects of preventing the welding surface from being reoxidized, and being strong in wetting capacity, low in solid content, free from lead splashing in the welding process, free from recrystallization phenomenon after welding and firm in welding; the soldering flux does not belong to dangerous goods based on the characteristics, namely, the organic soldering flux is convenient to transport, has the effect of safe use and is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of storage batteries, in particular to an organic flux and a preparation method thereof. Background technique [0002] 1. Maintenance-free lead-acid battery technology has only been widely developed in my country in the past ten years. With the introduction of automation equipment from abroad and domestic R&D and production, automated production equipment and technology have also been popularized, completely replacing the past completely relying on The manual and semi-mechanized production mode, especially the introduction of the world's advanced stretching net production line, has changed the transition and leap forward from the plate formation to the battery formation in the past, and has the advantages of increasing production, ensuring quality, reducing costs, protecting the environment and guaranteeing The benefits of workers' health, in order to adapt to the automation of stretched mesh battery assembly ...

AI Technical Summary

Problems solved by technology

[0003] 2. At present, most of the fluxes in China are inorganic water-based fluxes, which mainly rely on the oxides of lead on the corroded plate ears to help soldering. This kind of flux will leave solid residues on the plate ears after welding. As a result, the voltage drops after the electrolyte is added, and the battery short-circuit caused by base lead is prone to occur during aqueous welding. After welding, use a magnifying glass to observe that numerous lead points are formed around the welded lugs, and pb-sb-cd alloy welding It is easy to form recrystallization and make the whole lug brittle, which affects the overall service life of the battery pack

[0004] 3. In addition, inorganic series fluxes have strong chemical action and are highly corrosive, such as hydrochloric acid, hydrofluoric acid, tin chloride, sodium fluoride and zinc chloride, phosphoric acid series and their salts. These fluxes can remove metal The oxide film layer is an acidic flux. After use, there will be halide residues on the welded parts to form more serious corrosion. Therefore, this kind of flux cannot be used in battery assembly.