As one of the core components of PTC heater, NTC temperature sensor undertakes the key responsibility of real-time temperature monitoring and temperature control in the thermal management system of new energy vehicle. When the PTC heater is in working condition, the NTC converts the change of its resistance value into a voltage signal through the voltage divider circuit, and the microcontroller realizes temperature conversion after ADC sampling, and judges whether protective measures need to be taken to prevent the PTC heater from overheating and causing failure through this data.

The NTC temperature sensor produced by EXSENSE Electronics uses its high sensitivity to temperature to help PTC heater operate efficiently in new energy vehicle. Specifically,

1. Precise temperature control of cabin heating to improve user experience

The cabin heating of new energy vehicles relies on the PTC heater to quickly generate hot air, and the NTC temperature sensor monitors the air temperature entering the cabin through the heater in real time, and adjusts the PWN duty cycle with algorithms to ensure that the cabin temperature is kept within the appropriate range, making the driver and passengers feel better.

2. Preheat battery at low temperature to prolong the service life

In a low-temperature environment, the charge/discharge efficiency of the new energy vehicle battery will both decrease. At this time, and the PTC heater can be used to preheat the battery to restore normal operation. When the driver starts the vehicle, the NTC temperature sensor will monitor the temperature in real time, and the PTC heater adjusts the heating power according to its temperature feedback to avoid overheating that causing the battery aging and affect the battery life.

3. Constant temperature protection of the battery to ensure stable performance

NTC temperature sensor plays a dual role in this process:

Overheat temperature protection: When the battery temperature exceeds a safe threshold, NTC will reduce the PTC power or cut off the heating through the microcontroller to prevent the battery from thermal runaway.

Low temperature protection: In extreme low temperatures, the output of the PTC heater is adjusted with the assistance of the temperature sensor to maintain the battery temperature in a reasonable range and prevent hidden dangers.

To sum up, the TS series NTC temperature sensor of EXSENSE Electronics is the key to achieving high efficiency and high stability of PTC heater for new energy vehicle. From temperature feedback to power regulation, the NTC temperature sensor assists the PTC heater to improve the working performance and efficiency, and ensure the operation safety of new energy vehicle.