We propose an adaptive optimal power splitting EMS for PEMFC/battery hybrid system.

An online optimization problem based on the Pontryagins Minimum Principle was developed to minimize the hydrogen consumption.

An extremum adaptive-seeking control layer was proposed to take into account the PEM-FC performances drift.

The proposed optimal adaptive EMS is verified by simulation for two PEMFCs with different degree of degradation.

The classical EMS led to mismanagement when the operating parameters change whereas the adaptive EMS meet the power demand.