NF PTC Heater Manufacturer At EV Parts

Product Name:PTC Water Heater

Rated power:10kw

Rated voltage:600V

Control method:CAN/PWM

Product Detail

An electric coolant heater for EV is a crucial component in electric vehicles, mainly used for battery thermal management and cabin heating. The following is a detailed introduction:

PTC Heating Principle: Some EV electric coolant heaters use PTC (Positive Temperature Coefficient) heating elements. When the air - conditioning heating mode is turned on, the PTC heating spiral is energized by high - voltage electricity to heat the coolant. The electric water pump starts, and the heated coolant flows into the warm air inlet pipe and exchanges heat through the warm air core. The air - conditioning controller controls the blower to blow air, so that the air exchanges heat with the warm air core, and then hot air is blown out to heat the cabin.
Resistance Wire Heating Principle: There is also an immersion - type coolant resistance heater, which uses resistance wires, such as iron - chromium - aluminum alloy resistance wires, to directly heat the insulating cooling oil or coolant. The resistance wires can be designed in a spiral shape or an inner - outer double - loop shape to increase the heat - exchange area. The coolant flows through the inside of the resistance wires, and the heat generated by the resistance wires is directly transferred to the coolant, realizing rapid heating.

High Efficiency: The immersion - type coolant resistance heater can reach an efficiency of about 98%, and its electro - thermal conversion efficiency is higher than that of traditional PTC heaters. For example, when the coolant flow rate is 10L/min, the efficiency of the resistance - wire heater can reach 96.5%, and as the flow rate increases, the efficiency will further increase.
Fast Heating Speed: Compared with traditional PTC heaters, immersion - type coolant resistance heaters have a faster heating speed. Under the condition of the same input power and a coolant flow rate of 10L/min, the resistance - wire heater can heat up to the target temperature in only 60 seconds, while the traditional PTC heater takes 75 seconds.
Precise Temperature Control: It can realize infinitely variable control of the heat output through the built - in control unit. For example, some electric coolant heater can control the heat output by regulating the water outlet temperature or limiting the maximum heat output or power consumption, and its control step can reach 1%.
Compact Structure: The electric coolant heater is usually compact and lightweight, which is convenient for integration into the existing cooling system of the vehicle.