Can temperature sensors withstand the stress inside an EV battery? A thermistor family is designed to reduce cracking while keeping temperature at check.
Stackpole Electronics has introduced the TNC Series, a negative temperature coefficient (NTC) thermistors designed to monitor temperature in EVs battery management systems (BMS). Their thick-film construction is intended to withstand mechanical and thermal stress, which can lead to the cracking of conventional multilayer thermistors.
In a conventional EV, the temperature readings can help a BMS track battery conditions and manage charging within the cell’s operating limits. A stable thermistor can withstand temperature changes and vibration can support reliable monitoring over the vehicle’s service life.
The TNC Series uses thick-film technology to improve the sensor’s mechanical strength. The company also specifies consistent component thickness across resistance values, along with high solderability and heat resistance. The parts are AEC-Q200 qualified, a qualification used for passive electronic components in automotive applications.
The thermistors are available in 0402, 0603 and 0805 chip sizes, with resistance values ranging from 50Ω to 500kΩ across the series. The B-value, which describes how resistance changes with temperature, ranges from 2410K to 4700K. The specified operating temperature reaches 150°C for parts with B-values of 3300K or higher; lower B-values have a maximum operating temperature of 125°C.
The company also lists the RoHS and REACH compliance and describes the series as halogen-free. The series has a thermal time constant of five seconds or less indicating how quickly a thermistor responds to a temperature change under the specified test conditions.
Click here for the official announcement.
