Design of an optimized charge-blended energy management strategy for a plugin hybrid vehicle

This paper introduces the design of a charge blended energy management control system for use within a plugin hybrid electric vehicle. The approach taken extends the local cost function optimization routine associated with an Equivalent Fuel Consumption Method (EFCM) in which the charge-sustaining penalty factor is calculated online from an integrated PI controller rather than being derived from a pre-calibrated lookup table. The performance of the controller for a hybrid vehicle exercised over a number of different drive-cycles is presented. The powertrain model used to design and evaluate the system is derived from data logged onboard a number of different electric vehicles under real-world driving conditions.