Cockpit heating is the most basic heating need, and both fuel cars and hybrid cars can get heat from the engine. The electric drive train of an electric vehicle does not generate as much heat as the engine, so a electric parking heater is needed to meet winter heating needs. The recent increased emphasis on low temperature winter heating of the battery has also increased the power of the heater even further.
PTC (Positive Temperature Coefficient) means that the higher the temperature, the greater the resistance, and there is a positive correlation. At present, the vast majority of cars with this, you can directly use the car's battery power heating is more convenient. For pure electric vehicles, the car battery for high-voltage batteries, electric heaters will generally choose high-voltage electric heaters, because the voltage is high, the same electrical energy can be converted into heat energy more.
According to the working mode of electric coolant heater can also be divided into direct heating air and indirect heating air by heating water. The principle of directly heating the air is the same as the electric hair dryer, while the heating water type is closer to the form of heating. Due to the limited discharge capacity of the battery when starting at low temperatures in winter, battery preheating technology is also used by many car companies. The most widely used is the heating water type PTC heater, the cabin and battery in series in a heating circuit, through the three-way valve switch can choose whether to carry out the cabin and battery heating together in a large cycle or one of the individual heating of the small cycle. And it can satisfy both cabin and battery heating in the same circuit. By having an electric heater, the life of the electric vehicle battery is greatly extended.
Post time: Feb-24-2023
