In order to meet the requirements of new energy vehicle BMS for real-time data, reliability and security, this paper systematically analyzes the application scenarios and technical characteristics of wired communication technologies such as CAN and Ethernet and wireless communication technologies such as Bluetooth and 4G/5G in BMS. Combining the core functions and communication challenges of BMS, the application methods of communication technology in each function of BMS are analyzed in detail from the aspects of architectural communication, car-cloud communication, wireless BMS, chip support, security, etc., the application technology system of communication technology in BMS is established, and the application fields and characteristics of each communication protocol are determined.