Battery system architecture and dimensioning for urban track system

Abstract

With the acceleration of urbanization, urban traffic congestion and environmental pollution problems have become increasingly prominent. This paper proposes a dual-battery system architecture suitable for urban rail transit, which consists of a drive battery and an auxiliary battery. Through functional division and good optimization, the system efficiency and reliability are improved. The drive battery powers the cabin drive unit and charges the auxiliary battery. The auxiliary battery provides a stable 24V voltage for the traction control system and other auxiliary equipment. Through Simulink modeling and simulation, the system achieves a stable 24V output at a 60-100V input. The battery life is extended by controlling the battery power and the battery utilization is improved through regenerative braking technology.