New energy and power applications include traction-battery components, energy-storage cabinets, outdoor storage equipment and EV chargers. Components may face high voltage, high current, humidity, thermal cycling, UV, salt spray and outdoor temperature variation. Coatings must balance insulation, corrosion protection, weatherability and mechanical stability.
Busbars, housing folds and complex geometries can produce uneven film build. Thin areas may reduce insulation margin, while excessive thickness can increase pinhole and curing risk. Conductive joints, grounding points and assembly surfaces require accurate masking. Insulating products should be batch-verified for film thickness, cure and electrical performance.
As energy-storage systems and electric vehicles move to higher voltages, coatings will place greater emphasis on high insulation, humidity resistance, thermal-shock resistance and long-term reliability. Lower-temperature curing, thin-film insulation, automated in-line inspection and combined insulation-corrosion protection will become important directions.
Nannan Aluminum manufactures battery components for BYD. The project covers insulating and protective coatings for EV battery structural parts.
Battery housings, battery trays, liquid-cooling plates and busbars, coated with black and blue pure epoxy smooth finishes in high and medium gloss.
Supply has continued since March 2025, with annual consumption of approximately 120 tonnes and monthly deliveries of 10–15 tonnes. The coating replaces blue protective film and selected liquid-paint processes, reduces VOC emissions, and lowers total coating cost by more than 25%.
Replace blue protective film and improve structural bond strength
Replace selected liquid-paint processes and reduce VOC emissions
Reduce total coating cost for EV battery components
Dielectric withstand: DC 3800 V / 60 s, leakage current below 0.1 mA
No visible discoloration, blistering or delamination after 1,000 hours at 85°C / 85% RH
Shear strength (GB/T 7124): above 15 MPa, compared with approximately 4 MPa for blue film
Dielectric withstand: DC 3800 V / 60 s, leakage current below 0.1 mA
Dielectric strength (GB/T 1408.2): above 35 kV/mm
No visible discoloration, blistering or delamination after 1,000 hours at 85°C / 85% RH
Total coating cost reduced by more than 25% versus liquid paint
Share your substrate, pretreatment, insulation requirements and curing conditions with our technical team.