Simulation and analysis of switched capacitor dc-dc converters for use in battery electric vehicles

This paper presents a switched capacitor dc-dc converter based electric drive system for battery electric vehicles. The main idea is to replace the traditional IGBT boost converter by modular battery cell tied MOSFET switched capacitor converters. The system topology is presented, including the drive train architecture. The modeling approach for each electrical component, including the battery set, dc-dc and dc-ac converters, ac machines, and their control is discussed. Upon successful simulations, various efficiency analyses are performed. Finally, potential hardware implementation, including economic and spacing constraints, is discussed.