On the basis of narrow-band Internet of things（ NB-IoT） communication technology in low-rate cellular networks

voltage and operating temperature monitoring of capacitive cells are achieved. The embedded ARM9 band Linux operating system combined with the A/D voltage acquisition circuit and the DS18 B20 temperature sensor is used as the data acquisition platform

and the Qt graphical interface is used to display the data in the field. At the same time

the data is reported to the cloud platform and the PC server by using the NB-IoT communication technology. The test results show that the system can accurately realize field and remote monitoring the battery voltage and temperature data

and the voltage error is less than 1 % according to the data display. The operation of the system is stable and reliable

which provides conditions for field monitoring and remote monitoring.