Product Overview
High voltage coolant heater is the core component of thermal management in new energy vehicles. It is directly powered by the vehicle’s high-voltage battery, heats the coolant (ethylene glycol antifreeze), and then circulates through the water circuit to provide heat source for the battery, cabin, motor control, etc; A pure electric car has no engine waste heat, it is the core heat source in winter.
I Core Functions
1. Power battery preheating and insulation: Raise the temperature of the battery to the optimal working range at low temperatures, improve discharge capacity, fast charging power, reduce low-temperature decay, balance cell temperature, and protect battery life.
2. Cabin heating+front windshield defrosting and defogging: The coolant exchanges heat with the warm air core, providing warm air to the cabin, meeting the national standard defrosting and defogging requirements, and serving as a supplementary heat source for the heat pump under extreme cold conditions.
3. Low temperature insulation of electric drive system: Provide heat to the motor, electric control, and reducer circuits to reduce low-temperature losses and ensure the starting performance of the electric drive.
Hybrid/fuel cell cold start heat source: hybrid pure electric mode heating; Fuel cell models are used for stack preheating and cold start auxiliary heating.
4. Intelligent power regulation and safety protection: Receive VCU thermal management instructions, CAN communication closed-loop temperature control; Built in multiple safety protections such as overheating, dry burning, overcurrent, and insulation monitoring.
II Application Scenarios
1. Vehicle category
Pure electric passenger vehicles: sedans SUV、MPV； Low temperature heat pump system, battery preheating, cabin heating, scheduled charging preheating
Plug in hybrid PHEV: heating and battery insulation in pure electric mode, serving as a heat source when the engine is stopped
New energy commercial vehicles: electric buses, heavy trucks, light trucks, box type logistics vehicles, sanitation vehicles; High power version compatible with large cabin and large capacity battery
Fuel cell vehicles: hydrogen fuel buses, heavy-duty trucks, stack cold start preheating and insulation
Special&Engineering Electric Vehicles: Electric Engineering Machinery, Mining Trucks AGV、 Autonomous shuttle bus, airport shuttle bus
2. Working condition scenario
Operating in cold regions (-20 ℃ and below, heat pump attenuation, HVCH as the main heat source)
Pre heating the battery before charging to increase fast charging power
Parking pre air conditioning (APP reservation for cabin warming)
Front windshield defrosting and defogging meet regulatory requirements
Insulation of motor electrical control circuit during low-temperature start-up
III. Product Features
1. Complete variety. The power range includes 1-30KW, and the high voltage range includes 24V-1000V, meeting the different needs of different customers.
2. Wide range low-temperature adaptability. It can start stably at extremely low ambient temperatures, continuously output heat, adapt to high latitude extreme cold and high altitude large temperature difference working conditions, and meet the needs of battery preheating and long-term parking heating.
3. High reliability vehicle grade protection. Meet the requirements of commercial vehicle vibration, salt spray, and high and low temperature cycling; It has good insulation and sealing performance in high-altitude and low-pressure environments, avoiding the risk of high-voltage breakdown and leakage.
4. High power and fast thermal response. It can quickly heat up the coolant and support rapid temperature rise before battery cold start and fast charging.
5. The security protection mechanism is well-established. Built in high-voltage interlock HVIL circuit, linked with the vehicle’s high-voltage safety system, in conjunction with over temperature, over-current, and temperature sensor fault diagnosis, forming a complete high-voltage safety protection system.
Post time: Oct-30-2026
