Design of Modular BMS and Real-Time Practical Implementation for Electric Motorcycle Application
Henar Mike O. Canilang, Angela C. Caliwag, Wansu Lim
Abstract
Battery management systems (BMSs) are widely used in different battery applications to maximize the system operating efficiency. Due to different applications of BMS, different topologies are developed and used for implementation. In this letter, we propose a modular BMS circuit for electric motorcycles battery voltage applications and present a BMS platform for testing. We conduct a real-time evaluation of the BMS in the designed BMS platform considering a varying total input load voltage ranging from 51.2–67.2 V. The real-time evaluation is conducted using four local modules and one central module. The results are verified using the BMS platform designed for this specific BMS. The BMS voltage measurement accuracy is evaluated. Actual input load voltage values are used to verify the voltage values measured by the BMS, and significantly high accuracy is achieved with a mean RMSE of 0.0018895. In terms of relative error, a mean value of 0.03575 is achieved for the four-cell modular BMS application.