An HV (High Voltage) auxiliary heater is used in electric and hybrid vehicles to provide efficient cabin and battery heating—especially when traditional heat sources like engine waste heat aren’t available. Here’s why it’s essential:
Primary Functions:
Cabin Heating: Ensures passenger comfort by warming the interior, particularly in cold climates where quick heat-up is crucial.
Battery Preconditioning: Maintains optimal battery temperature, which helps preserve performance, extend range, and enable faster charging.
Defrosting & Demisting: Clears windshields and windows for better visibility and safety.
How It Works:
Converts DC electrical energy from the vehicle’s high-voltage system (typically 400V or 800V) into heat using technologies like PTC (Positive Temperature Coefficient) or thick film heating elements
Offers fast response times, self-regulating temperature control, and high efficiency—often above 95%.
Benefits:
No reliance on engine heat, making it ideal for EVs and plug-in hybrids.
Energy-efficient and safe, with built-in protections against overheating.
Compact and versatile, allowing easy integration into various vehicle platforms.
Would you like to explore how these heaters compare across different EV models or dive into the tech behind PTC heating?
Post time: Jul-24-2025
