A power supply system of a fuel cell using user authentication includes: a tagging device that receives user information of a user terminal; an identity authentication unit, which compares the user information inputted through the tagging device with previously stored authentication information and outputs a use authority signal when the user information matches the authentication information; a power module complete that produces electric power by a chemical reaction between hydrogen and oxygen; a battery that receives and is charged with electric power produced by the power module complete; an output terminal that is connected to the battery to output electric power stored in the battery; and an integrated body control unit that controls electric power to be outputted through the output terminal when the identity authentication unit outputs the use authority signal.

A system and method for predictive fuel cell management system for an integrated hydrogen-electric engine is disclosed. The system includes a fuel cell stack having a plurality of fuel cells and a computer having a memory and one or more processors. The one or more processors configured to predict, during a first phase of energy demand on the integrated hydrogen-electric engine, an impending occurrence of a second phase of energy demand on the integrated hydrogen-electric engine, wherein the second phase of energy demand includes a predetermined energy demand; and generate a predetermined amount of energy from the plurality of fuel cells based on the predicted second phase of energy demand prior to starting the second phase of energy demand to improve energy efficiency and performance of the integrated hydrogen-electric engine.

Disclosed is a fuel cell-based multiple power supply system, and more particularly a fuel cell-based multiple power supply system capable of alternately operating a polymer electrolyte membrane fuel cell that is rapidly started up and provides fast response and a solid oxide fuel cell that provides high power generation efficiency depending on required situations and remedying some power deficiency using an energy storage system or a secondary battery, such as a super capacitor, thereby flexibly dealing with a situation difficult to solve using a single fuel cell.

The present disclosure relates to a method and system for determining, applying, and/or managing the state-of-health of fuel cell to control the lifespan of the fuel cell in a vehicle and/or powertrain.

A method of operating a fuel cell stack is described. The fuel cell stack includes a cathode, an anode, a sump configured for collecting water from the anode, and a temporarily disabled drain valve that is otherwise configured to transition from a first position to a second position and thereby modulate water drained from the sump. The method includes increasing a first pressure in the anode via a controller. The method also includes, concurrent to increasing, decreasing a second pressure in the cathode via the controller and, concurrent to decreasing, maintaining a relative humidity of less than a threshold relative humidity in the cathode via the controller.

Disclosed is a fuel cell system that stops producing electricity and exhausts residual electricity in an emergency situation. The fuel cell system includes a stack receiving a reactive gas including a hydrogen and/or an oxygen to produce the electricity, a pump supplying the reactive gas to the stack, a discharge circuit including a resistor that discharges a residual power in the stack and a first relay that electrically connects or disconnects the resistor to or from the stack, a generator connected to a rotational shaft of the pump to convert a driving energy of the rotational shaft of the pump to an electric energy, and a first controller controlling the first relay. The first controller receives the electric energy from the generator and controls the first relay to electrically connect the stack and the resistor such that the residual electricity in the stack is exhausted in the emergency situation.

Each fuel cell apparatus among a plurality of fuel cell apparatuses is caused to transmit, as distinguishing information, at least one of a cumulative operating time and a rated power of the respective fuel cell apparatus to other fuel cell apparatuses. Each fuel cell apparatus is caused to receive distinguishing information transmitted by other fuel cell apparatuses. Each fuel cell is caused to select a fuel cell apparatus among the plurality of fuel cell apparatuses to be a master apparatus on the basis the distinguishing information of the respective fuel cell apparatus and the distinguishing information received from other fuel cell apparatuses.

A fuel cell system includes a fuel cell stack that generates electricity using fuel and oxidant gases, a reformer that produces the fuel gas by reforming a raw material, a raw material feeder that supplies the raw material to the reformer, a combustor that combusts anode off-gas discharged from the anode of the fuel cell stack, and a controller that controls the raw material feeder. The period of a load-following operation in which the power output of the fuel cell stack shifts from a lower level to a higher level, is divided into multiple sub-periods. For each sub-period, a ratio is determined from the increase amounts in the flow rate of the raw material during the sub-period and the length of the sub-period. The controller controls the raw material feeder to make a ratio on the higher output side smaller than another on the lower output side.

The present invention relates to a high voltage-type redox flow battery comprising: a plurality of modules (100.sub.1, 100.sub.2, 100.sub.3, . . , 100.sub.n) which are serially connected; and a battery management system (BMS) for monitoring a state-of-charge (SOC) of each of the plurality of modules (100.sub.1, 100.sub.2, 100.sub.3, .., 100.sub.n), wherein each of the modules (100.sub.1) includes an SOC balancing device comprising a stack (10), a positive electrode electrolyte tank (30a), a positive electrode pump (20a) for providing a positive electrode electrolyte of the positive electrode electrolyte tank (30a) to the stack (10), a positive electrode inlet pipe (21a) connecting the positive electrode electrolyte pump (20a) to the stack (10), a positive electrode outlet pipe (11a) connecting the stack (10) to the positive electrode electrolyte tank (30a), a positive electrode tank outlet pipe (31a) connecting the positive electrode electrolyte tank (30a) to the positive electrode electrolyte pump (20a), a negative electrode electrolyte tank (30b), a negative electrode pump (20b) for providing a negative electrode electrolyte of the negative electrode electrolyte tank (30b) to the stack (10), a negative electrode inlet pipe (21b) connecting the negative electrode electrolyte pump (20b) to the stack (10), a negative electrode outlet pipe (11b) connecting the stack (10) to the negative electrode electrolyte tank (30b), and a negative electrode tank outlet pipe (31b) connecting the negative electrode electrolyte tank (30b) to the negative electrode electrolyte pump (20b).

A propulsion system is provided including: a gas turbine engine including a combustion section having a combustor; and a modular fuel cell assembly. The modular fuel cell assembly includes: a first fuel cell string comprising a first processing unit and a first fuel cell stack, the first fuel cell stack comprising a first fuel cell defining an outlet configured to provide output products from the first fuel cell to the combustor; and a second fuel cell string comprising a second processing unit and a second fuel cell stack, the second fuel cell stack comprising a second fuel cell defining an outlet configured to provide output products from the second fuel cell to the combustor.