Battery Monitoring System Design Based on NB-IoT

Aiming at problems such as limited computing power, insufficient local data storage capacity and short data transmission distance of traditional battery monitoring systems, this paper designed a lithium battery monitoring system based on Narrow Band Internet of Things (NB-IoT). System is designed with STM32F103 as the main control chip, and the BQ76930 chip collects relevant information such as voltage, current and temperature. The battery information is transmitted to the Alibaba Cloud server through the NB-IoT module, and state of charge (SOC) estimation and information storage are performed on the server. Finally, the battery information is displayed through the PC and mobile terminal. According to the results of the test, the system meets the design requirements and has practical engineering significance.