Method of controlling an electric power system of a fuel cell electric vehicle

A computer implemented method of controlling an electric power system of a fuel cell electric vehicle (FCEV), the electric power system comprising a fuel cell and an energy storage system electrically connected to each other, wherein the FCEV comprises an electric traction motor connected to the electric power system, the electric power system being configured to feed electric power to the electric traction motor at a propulsion power level range during propulsion, and to receive electric power, generated by the electric traction motor, during braking, the electric power system being operable to assume a low load operation mode, in which electric power is fed to an energy consumer of the FCEV at a power level below the propulsion power level range, the energy consumer being different from the electric traction motor, and processing circuitry operatively coupled to the energy storage system, the method comprising:

• determining, by the processing circuitry, an upcoming position at which the electric power system will assume the low load operation mode;
• determining, by the processing circuitry, a current state of charge level of the energy storage system;
• determining, by the processing circuitry, a desired state of charge level of the energy storage system when ending the low load operation mode;
• determining, by the processing circuitry, an energy consumption level of the energy consumer during the low load operation mode;
• determining, by the processing circuitry, a charging level of the energy storage system by the fuel cell during the low load operation mode;
• determining, by the processing circuitry, a power distribution scheme between the electric power system and the electric traction motor for arriving at the upcoming position with a state of charge level of the energy storage system below a predetermined threshold level, wherein the predetermined threshold level of the energy storage system when arriving at the upcoming position is based on the desired state of charge level and a difference between the charging level of the energy storage system and the energy consumption level of the energy consumer;
• controlling, by the processing circuitry, the electric power system based on the power distribution scheme;
• and
• controlling, by the processing circuitry, the electric power system to feed electric power from the fuel cell at least to the energy consumer when the electric power system assumes the low load operation mode at the upcoming position.