Release agent for lead-acid battery cast-welding and preparation method thereof

Abstract

The invention relates to a release agent for lead-acid battery cast-welding and a preparation method thereof. The release agent mainly comprises 2% of hexavalent chromium extracted by an alkaline solution, 10% of polybrominated biphenyl, 10% of monobromobiphenyl, 10% of dibromobiphenyl, 10% of tribromodiphenyl ether, 5% of a resin having high heat resistance, 4% of methanol, 2% of a surfactant, 1% of glycerol and 46% of a solvent. The preparation method comprises the following steps of heating glycerol and the surfactant to a temperature of 80 to 100 DEG C, adding methanol into the heated glycerol and the surfactant, stirring for 1 hour, adding hexavalent chromium extracted by an alkaline solution, polybrominated biphenyl, monobromobiphenyl, dibromobiphenyl, tribromodiphenyl ether, the resin having high heat resistance and the solvent into the mixture, and stirring for 1 hour. The release agent can effectively improve welding effects, realize fast release after cast-welding, improve surface finish of a bus-bar, prolong a service life of a storage battery, prevent that lead residues and other attachments adhere to the interior of a released mold, avoid mold cleaning after casting and be prepared simply and easily, has no peculiar smell and no harmful substances, and is safe and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of release agents, in particular to a release agent for casting and welding of lead-acid batteries and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of electric vehicles, it has greatly promoted the rapid development of the battery industry, among which lead-acid batteries have been greatly developed, and the manufacturing process has also developed from the past welding process to the current casting welding process. However, demoulding during the casting and welding process has become a major problem in the manufacture of lead-acid batteries. The old demoulding method is mainly to use a demoulding machine plus ultrasonic plus a demoulding agent for demoulding. There are generally two types of release agents used for demoulding: one is the release agent containing silicate, such as sodium silicate, commonly known as water glass release agent; the ot...

AI Technical Summary

Problems solved by technology

However, the demoulding effect of the above two types of mold release agents is not very satisfactory. There are mainly the following problems: ①The demoulding effect is poor, and it is easy to stick to the mold; Inconsistent thickness; ③The damage to the mold is large, it is difficult to clean, and the life of the mold is reduced; ④The release agent is uneven and the thermal insulation performance is poor; ⑤The composition and configuration process of water glass is complicated. Can’t play a role; ⑥Large dosage and high cost

Although cork powder is easier to remove from the mold and the cost is lower, residues are often stuck on the bottom mold after demoulding, which requires special cleaning of the bottom mold. Cleaning, or cleaning with a sandblasting cleaning machine, or using oil, acetylene, oxygen to burn off residues and dirt, or cleaning with an electric grinder, polishing machine, which is time-consuming and labor-intensive, and damages the mold

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