2026-09-15
A Vietnam-based charging infrastructure program was scaling up DC fast charging piles for highways and commercial sites. The engineering team needed an encapsulation material that could survive continuous high-power operation while keeping production simple and cost predictable. Because the program was export-oriented, documentation and consistency were as important as raw performance.
Early prototypes used a general-purpose resin that discolored and hardened over time, and the material was difficult to dispense consistently at the required throughput.
| Criterion | Requirement |
|---|---|
| Thermal conductivity | ≥ 1.5 W/m·K |
| Certifications | RoHS, REACH, UL support |
| Customization | Viscosity, hardness, cure time, color |
| Capacity | Stable volume supply for export |
The client shortlisted several vendors and chose a potting compound manufacturer with in-house formulation. Direct factory engagement meant faster formula iteration, transparent quality control, and pricing that held up as volumes grew. The vendor was also a proven China potting compound factory, giving the project confidence in export logistics, customs experience, and documentation.
Hanast supplied an RTV-2 silicone potting compound engineered for DC fast-charging modules, combining 1.5 W/m·K thermal conductivity with high dielectric strength and long-term elasticity. The team provided samples, thermal-cycling test data, and application support from first article to mass production, and adjusted the cure profile to match the client's line speed.
After an initial sample round, Hanast delivered a slightly adjusted grade with lower viscosity for easier dispensing and a color match for the client's branding. Batch-to-batch consistency was verified against reference data, and the client ran its own accelerated aging tests before releasing the material to production.
With a stable material and a responsive manufacturing partner, the program moved from prototype to volume production without redesign. The client now treats encapsulation as a strategic supply category, reviewing grades jointly with Hanast as new charger models are introduced.
Shenzhen Hanast New Material Co., Ltd. manufactures RTV-2 liquid silicone and potting compounds from a 40,000㎡ base established in 2010, exporting 70–80% of output to clients including ABB, Apple, Foxconn, and BYD. Reach out to discuss encapsulation for your DC fast charging pile program.