As new energy vehicle battery thermal management evolves, two major technology routes dominate the market: PTC heaters and thin/thick film heaters. Each offers distinct principles and performance advantages. Hebei Nanfeng Automobile Equipment (Group) Co., Ltd, a leading Chinese supplier of EV components and designated supplier for military vehicles, provides both mature PTC water heater solutions and advanced film‑based heaters.
HVCH Working Principle & Design Differences
PTC heaters rely on positive temperature coefficient ceramics. As temperature rises, resistance increases sharply, achieving self‑limiting temperature and inherent overheat protection. This passive regulation delivers safety but limits control precision and response speed.
In contrast, thin/thick film heaters use etched metal foil or thick‑film circuits – a pure resistive system that converts electricity into heat with high efficiency. They enable active, precise control via PWM, ultra‑compact construction (as thin as 0.3‑1.5 mm), and natural adaptation to 800V platforms – a key advantage over PTC technology.
HV Coolant Heater Performance Comparison
| Metric | PTC Heater | Thin/Thick Film Heater |
|---|---|---|
| Energy efficiency | <90% | 95‑97% |
| Inrush current | Present | None |
| Power stability | Drops with coolant temperature | Stable across full range |
High Voltage Coolant Heater Applications
PTC technology remains the mainstream choice due to its maturity and low cost, widely used in ptc coolant heater and cabin heating systems for BEVs, HEVs, and FCEVs.
Film heaters serve as high‑efficiency electric coolant heater solutions, especially for high‑voltage platform battery heating (400V/800V). They ensure rapid battery warm‑up in low temperatures, optimizing charging performance and battery life.
Nanfeng’s Comprehensive Offerings
Leveraging six factories and decades of expertise, Nanfeng supplies both reliable PTC heaters and advanced thin/thick film heaters – including the high voltage coolant heater and hv coolant heater. Whether your priority is cost‑effectiveness or ultimate efficiency for 800V platforms, Nanfeng delivers a tailored solution.
Electric Coolant Heater Summary
Choose PTC when cost is key for entry‑level or 400V vehicles. Choose thin/thick film heaters when pursuing extreme efficiency, lightweight design, fast heating response, or 800V readiness. For more information on Nanfeng’s electric coolant heater portfolio, please contact us directly.
Post time: May-18-2026
