High‑voltage Thick Film Electric Coolant Heater

High voltage thick film coolant heater (HVCH) is a core component of high-voltage thermal management for new energy vehicles. It uses thick film heating technology (TFE) instead of traditional PTC to heat the coolant on the 400V/800V platform, while also considering battery preheating and cabin heating. It is efficient, compact, and has a long service life.
1. Advantages compared to traditional PTC
✅ Higher power density: Increases power by 30-50% for the same volume, compatible with 800V high-power fast charging.
✅ Faster response: Low thermal mass, reduced cold start preheating time by 50%, and improved low-temperature endurance.
✅ Higher energy efficiency: No intermediate thermal resistance, energy consumption reduced by 10-15%, and better winter endurance.
✅ Longer lifespan: Thick film components are resistant to thermal shock and corrosion, doubling their lifespan.
✅ Safer: Multiple sensors+independent secondary shutdown path, preventing dry burning/overheating/leakage.
✅ More compact: reduced volume by 20-40%, easy to integrate into small cabins.
2. Vehicle application scenarios
Thermal management of power batteries: Preheat the battery to 25-35 ℃ at low temperatures (<15 ℃) to improve fast charging speed, capacity, and cycle life.
Cabin heating and defogging: Replace engine waste heat, quickly warm up in winter, defogger and defrost the glass, and improve comfort.
Hybrid/fuel cell vehicle: hybrid vehicle battery and cabin heating; Fuel cell vehicles assist in preheating to improve low-temperature starting performance.
Our company produces various models of high-pressure thick film coolant heaters and is one of the few manufacturers in China that can produce high-pressure thick film coolant heaters.