The new energy battery housing is the core load-bearing and protective structural component of the power battery PACK. Most are formed by stamping aluminum alloy and undertake key functions including sealing, crash protection and heat dissipation of the battery pack. After multiple processes such as deep drawing, punching, bending and trimming, stamped parts including battery housing covers, trays and frames carry large amounts of residual drawing oil, stamping grease, aluminum chips, metal dust and release agent residues on their surfaces and inside crevices. Tiny as these contaminants are, they pose severe risks to subsequent processes. Residual oil may cause poor laser welding, pores and aluminum inclusions in weld seams and weaken welding strength. Contaminants can also impair the bonding performance of sealant, leading to adhesive delamination and seal failure, which may result in water ingress and corrosion of the battery pack. In addition, residual impurities undermine the appearance and coating adhesion of electrophoretic and sprayed finishes, directly affecting the safety, reliability and service life of power batteries. Conventional spray cleaning and immersion cleaning perform poorly on blind spots such as folded edges, rib grooves and counterbores, often leaving oil and aluminum powder behind. Ordinary ultrasonic cleaning tends to cause watermarks, dark oxidation on workpieces and inconsistent cleanliness, failing to meet the high stability requirements of mass production for new energy battery housings.

Developed for the characteristics of stamped aluminum alloy battery housings, Buck provides a dedicated complete ultrasonic cleaning solution that balances degreasing performance, aluminum anti-corrosion and low residue requirements. The full process includes pre-spray rough cleaning, main ultrasonic cleaning, multi-stage pure water rinsing, air knife blow-off and hot air drying. A vacuum ultrasonic process can be upgraded upon customer request to reach hidden areas such as stamping rib grooves, flanging gaps and counterbores. Leveraging ultrasonic cavitation effect, the solution gently removes drawing oil, aluminum powder and stamping debris attached to workpiece surfaces and deep inside crevices. Neutral cleaning media compatible with aluminum alloy are adopted to avoid substrate corrosion, discoloration, whitening and oxidation of aluminum parts during cleaning.

The main equipment chamber is made of 316L stainless steel and equipped with circulating filtration and oil-water separation systems to continuously separate floating oil and metal powder and prevent secondary contamination of workpieces by cleaning fluid. Ultrasonic power, cleaning temperature, conveying speed and rinsing cycle can be adjusted independently. It supports continuous batch cleaning for stamped parts of various sizes including battery trays, top covers and frames. Cleaned workpieces feature uniform surfaces free of oil film and aluminum powder residues. No water stains remain after drying, consistently meeting the cleanliness control requirements of battery manufacturers and suiting downstream processes such as laser welding, adhesive sealing and surface coating.

Buck cleaning lines support integration with automated production lines. They can be fitted with roller conveyors and loading/unloading robots and connected to production control systems to realize full automation of loading, cleaning, rinsing, drying and unloading. Secondary contamination caused by manual handling is greatly reduced, the yield rate is steadily improved and rework costs are cut.

With the rapid development of the new energy industry, cleanliness control of battery housings has become an indispensable critical control point in battery pack manufacturing. Targeting the cleaning pain points of aluminum alloy stamped parts, Buck’s ultrasonic cleaning solution delivers stable and reliable cleaning results and flexible production line adaptability. It offers a mature cleaning solution for stamped structural parts such as power battery housings, battery frames and water cooling plates, guarantees the quality of welding, sealing and coating, and helps new energy battery manufacturers achieve safe, efficient and large-scale production.