Field and bench test evaluation of range extension control system for electric vehicles based on front and rear driving-braking force distributions

Electric vehicles (EVs) have a disadvantage in that the cruising distance per charge is short. This paper proposes a model-based range extension control system (RECS) for EVs. The proposed system optimizes the front and rear driving-braking force distributions by considering the slip ratio of the wheels and the motor loss. The optimal distribution depends solely on the vehicle acceleration and velocity. Therefore, this system is effective not only at constant speeds but also in acceleration and deceleration modes. Bench tests were conducted for more precise evaluation and to realize experimental results with high reproducibility. The effectiveness of the proposed system was verified through field and bench tests.