Application Of Thick Film Heating Technology In New Energy Vehicles

1. Air heating method (heating element is resistance wire or PTC): electric heating components are arranged in the air outlet channel of the air conditioner, and the air flows directly through the heating components and is heated and then blown into the car cabin.

2. Water heating method (heating element is PTC or thick film heating): the heating element is arranged in the liquid flow channel of the component, and the heat is brought to the heat exchanger in the air outlet channel by circulating the heated liquid. The air flows directly through the heat exchanger and is heated and then blown into the car cabin.

3. Heat pump method: Although it has the highest energy efficiency ratio, when the ambient temperature is low in winter in northern regions, heating cannot guarantee the normal use of the vehicle, so it has not been applied in domestic passenger cars.

The air  heating method has the characteristics of simple system and easy layout. Because of its high air heat exchange interface temperature, the heating comfort of the occupants is not strong. In addition, the electric heating components enter the passenger car cabin, which poses a great safety hazard.

The water heating method can effectively improve the heating comfort of the occupants. The electric heating components are in the front cabin of the car, which is safer and more reliable, but the component manufacturing technology is more difficult. From a safety perspective, water heating is the mainstream of the future development of new energy vehicles.

Classification and characteristics of HVH water heaters for new energy vehicles: From the perspective of the heating elements used, water heaters can be divided into two technical routes: PTC and HIC. Both types of products have mature applications in listed new energy vehicle models.