Adaptive Control of Fuel Cell-Battery Hybrid Systems Considering Power Sources Degradation

This article proposes an adaptive control for the power distribution of fuel cell (FC) hybrid electric vehicles. port-Hamiltonian framework is utilized to describe the fuel cell hybrid system dynamics. Then, the controller is designed in the interconnection and damping assignment passivity-based control approach to distribute the power flow between the fuel cell and the battery pack, and the stability of designed controller has been proved. Moreover, an adaptation law is utilized to improve the fuel economy and durability of energy sources, and the battery state of charge is online estimated by a quasi-sliding-mode observer. Finally, simulation and experiments are conducted to verify the performance of proposed controller compared with an equivalent consumption minimization strategy.