Akademik Veri Yönetim Sistemi
18th International Scientific Research Congress (UBAK), Ankara, Türkiye, 16 - 17 Aralık 2023, ss.1
The electric vehicle's power management system performs power optimization of the vehicle based on the health status of the battery packs and protection units used within the vehicle. Each battery pack used in the vehicle undergoes power optimization (protection and management functions) by controlling temperature, voltage, state of charge (SOC), and withdrawn current values. Over time, variations occur in the cells within the used battery packs due to different factors such as charge/discharge rates, discharge depth, temperature, etc. Consequently, there is a need for voltage balancing for series-connected battery packs. In this study, three series-connected battery packs with a power of 400 volts and 75 kW are employed for an electric vehicle. Active balancing through a DC/DC converter is performed based on SOC values. A Switching Box is designed with an optimum number of switching elements. The connection between the battery packs and the DC/DC converter is established through the Switching Box. Battery balancing is carried out with control signals from the power management system. This study presents the design of an active balancing system based on DC/DC converter for electric vehicles. The study is simulated and verified (for different vehicle speed/power consumption profiles) in MATLAB/Simulink environment.