Fuzzy logic controller for lithium-ion battery in standalone DC microgrid

An isolated dc microgrid for a residential building is proposed, with a solar photovoltaic array as its primary power source during daytime when insolation is sufficient and a backup dc generator during other times. A lithium-ion battery is used as the energy storage device in this system, and a fuzzy logic-based charge/discharge controller for this battery is designed and implemented. The model is simulated in MATLAB/Simulink to verify the efficacy of the controller. The performance of the fuzzy controller is evaluated based on the proper supply of power to the load at all times and maximizing the life of the battery by minimizing high charge or discharge.