What does PTC mean in cars?

[RichardLee]

PTC in cars refers to the PTC heater in automobiles. PTC generally denotes semiconductor materials or components with a large positive temperature coefficient. Automotive heaters are primarily used for preheating the engine in winter and providing warmth for the truck cab or passenger compartment. Electric vehicles have predominantly used PTC heaters. PTC can be employed as a ceramic heating element for starting cars in low-temperature conditions. It can be designed into different structural forms such as tubular and flat disk types, thereby maximizing the thermal efficiency generated by PTC. Due to the automatic constant-temperature heating characteristics of PTC thermistor elements, and the fact that such PTC heater components operate in a contactless state when controlling temperature, they are particularly suitable for use in cars where conditions constantly change in bumpy environments.