An energy regulation method for a fuel cell energy supply system including a plurality of fuel cell power generation modules, a plurality of power conversion modules, and a communication control module connected to the plurality of power conversion modules includes: calculating a parameter average value based on an energy state parameter of the fuel cell power generation module; calculating a compensation factor depending on the energy state parameter and the parameter average value; calculating a control parameter reference value of each of the power conversion modules based on a droop algorithm, and multiplying the control parameter reference value by the corresponding compensation factor to obtain a control parameter set value of the power conversion module; and regulating the corresponding fuel cell power generation modules depending on the control parameter set value.

An electrical power control system includes a first fuel cell system and a second fuel cell system, and a waste electricity unit connected in series with a switch unit. The waste electricity unit and the switch unit are connected in parallel with each of the fuel cell systems. At a time when at least one power supply system is started, a control unit selectively executes a charging control and a waste electricity control, based on at least one of temperature information and electrical storage information. The charging control suppresses a rise in voltage by supplying the electrical power of the power supply system to the power storage device. The waste electricity control suppresses a rise in voltage by supplying the electrical power of the power supply system to the waste electricity unit.

A lightweight, high power density, fault-tolerant fuel cell system, method, and apparatus for full-scale clean fuel electric-powered aircraft having a fuel cell module including a plurality of fuel cells working together to process gaseous oxygen from air compressed by turbochargers, superchargers, blowers or local oxygen supply and gaseous hydrogen from liquid hydrogen transformed by heat exchangers, with an electrical circuit configured to collect electrons from the plurality of hydrogen fuel cells to supply voltage and current to motor controllers commanded by autopilot control units configured to select and control an amount and distribution of electrical voltage and torque or current for each of the plurality of motor and propeller assemblies, wherein electrons returning from the electrical circuit combine with oxygen in the compressed air to form oxygen ions, then the protons combine with oxygen ions to form H.sub.2O molecules and heat.

A method for distinguishing the cause of voltage losses in a fuel cell device includes: a) Detection of a quasi-stationary operation of the fuel cell device, b) Acquisition and storage of a measured current-voltage characteristic curve with the current values and the voltage values of a fuel cells stack of the fuel cell device, c) Use of a PtOx model to determine PtOx voltage losses and calculation of a corrected current-voltage characteristic curve for the PtOx-free and normally humidified fuel cell stack, and d) Comparison of the current-voltage characteristic curves determined in step b) and in step c) and detection of an at least partially dried-out fuel cell stack if the measured current-voltage characteristic curve runs below the corrected current-voltage characteristic curve. A fuel cell device and a motor vehicle comprising a fuel cell device are also provided.

An operation control system and method of a fuel cell vehicle are provided. The system includes a fuel cell, an air supply device operated by a motor, to supply air to the fuel cell and a sensing unit that senses an abnormal operation of the air supply device. A calculation unit calculates a lower-limit voltage of the air supply device required for normal operation of the air supply device when the sensing unit senses abnormal operation of the air supply device. A controller then adjusts a voltage supplied to the air supply device based on the calculated lower-limit voltage.

A power supply system including a stack of fuel cells, a device for regulating the voltage at the poles of the stack which includes a resistive load connected between the poles of the stack for generating a voltage drop between them and a controlled switch inserted in series with the resistive load, which can be actuated between an open configuration and a closed configuration.

An electrical energy supply system for mobile platforms includes an electrical arrangement having at least two fuel cell units in a serial interconnection in relation to one another in the electrical arrangement and configured to provide an electrical voltage to supply at least one consumer. The electrical energy supply system includes a ground unit which is assigned an electrical reference potential, and at least two control units, which are each assigned to at least one of the fuel cell units, wherein each of the at least two control units is configured to detect an electrical voltage of the assigned fuel cell unit in relation to the reference potential. An aircraft is disclosed having an electrical energy supply system.

A disclosed fuel cell system includes a fuel inlet that receives a fuel gas from a fuel source, a gas analyzer that determines a composition of the fuel gas received by the fuel inlet, and a stack including fuel cells that generate electricity using the fuel gas received from the fuel source. The fuel cell system further includes a controller that controls at least one of a fuel utilization of the stack, a current generated by the stack, or a voltage generated by the stack, based on the composition of the primary fuel gas determined by the gas analyzer. The controller may control the fuel cell system by increasing or decreasing a fuel flow rate to thereby increase or decrease the voltage generated by the stack to maintain a predetermined target voltage or to maintain a predetermined rate at which usable fuel is supplied to the stack based on composition.

The present invention provides a fuel cell stack protection method, a fuel cell stack protection device and a fuel cell power supply system. The method comprises: determining whether a load-dump failure occurs to the fuel cell; controlling the bleeder circuit connected to the output ends of a DC-DC circuit in the fuel cell so as to discharge the DC-DC circuit when a load-dump failure occurs to the fuel cell. When a load-dump failure occurs to the fuel cell, the bleeder circuit connected to the output ends of the DC-DC circuit in the fuel cell is turned on to discharge the DC-DC circuit so that the DC-DC circuit in the fuel cell can continue to output a current, thus preventing the voltage of a fuel cell stack from rising abruptly because of a load-dump failure and preventing any damage caused by a load-dump failure to the fuel cell stack

A fuel cell system wherein the fuel cell comprises an electrolyte membrane; wherein the electrolyte membrane is a perfluorosulfonic acid (PFSA) membrane; wherein the controller has a data group showing a correlation between the current of the fuel cell and the temperature of the fuel cell which is necessary to keep a moisture content of the electrolyte membrane at a predetermined moisture content threshold or more; and wherein, when the temperature and voltage of the fuel cell become a predetermined first temperature threshold or more and a predetermined voltage threshold or more, respectively, the controller conducts a temperature dropping time power generation mode in which power generation is conducted while controlling the current of the fuel cell with reference to the data group, until the temperature of the fuel cell becomes a predetermined second temperature threshold which is lower than the first temperature threshold.