A vehicle includes a fuel cell stack arranged to generate power for propulsion, an auxiliary fuel cell stack component, and a processor. The processor, responsive to a crowdsourced average value of an operating parameter of an auxiliary fuel cell stack component of other fuel cell vehicles being different, for a pre-defined power level, than an average value of a same operating parameter of the auxiliary fuel cell stack component by a pre-determined amount, purge the fuel cell stack of nitrogen.

A system and method for calibrating an offset of a pressure sensor for a fuel cell including one or more fuel cell modules in which power generation is individually controlled by independently supplying hydrogen or air to a fuel cell stack includes a pressure sensor to sense a pressure of the hydrogen supplied to the fuel cell stack, a monitoring unit which monitors whether offset calibration of the pressure sensor of the one or more fuel cell modules is required, a power generation control unit which individually controls the one or more fuel cell modules to continue or stop power generation, and a calibration control unit which calibrates the offset of the pressure sensor of the fuel cell module in a state where power generation is stopped based on a preset offset calibration period or the monitoring of the monitor unit as to whether calibration is required.

A vehicle includes a motor, a battery, a fuel cell stack, and a controller. The battery is configured to supply power to the motor to propel the vehicle. The fuel cell stack is configured to generate power to charge the battery. The controller is programmed to, while traversing a route with the fuel cell stack not operating and, responsive to data indicative of a predicted distance to empty at an end of the route being greater than a distance threshold, inhibit starting of the fuel cell stack during the traversing.

The present invention relates to the field of power sources associated with a conversion and control system of power sources based on fuel cells. The system comprises a control unit and at least one circuit arm with at least two fuel cell modules connected in series. Each fuel cell module has a bypass connected to the arm in parallel to the fuel cell. The system can be embodied with at least one circuit arm. When the system is embodied with two or more arms, these arms are interconnected in parallel. At that, each arm comprises the same quantity of installed fuel cell modules connected in series. The bypass is connected to the control unit in order to receive control signals. As an embodiment, each fuel cell module also comprises a DC/DC converter, which is in turn connected to the control unit in order to receive control signals.

A system and method for diagnosing a fuel cell includes one or more fuel cell modules each including a fuel cell stack to output power through a first converter and a battery connected to the fuel cell stack through a second converter; and a controller configured to determine whether diagnosis of the fuel cell stack included in the one or more fuel cell modules is required, and to control the one or more fuel cell module to simultaneously or sequentially diagnose the fuel cell stack determined to require diagnosis based on an output demand power of the one or more fuel cell modules.

A fuel cell system power supply includes: a fuel cell stack configured to react hydrogen and oxygen in air with each other in order to generate electricity; a high-voltage converter configured to boost output power of the fuel cell stack; and a high-voltage junction unit configured to transmit the output power of the fuel cell stack to the high-voltage converter and to receive high-voltage power from the high-voltage converter. The high-voltage junction unit has a structure configured to simultaneously accommodate an output terminal of the fuel cell stack and an input terminal of the high-voltage converter. Consequently, the assembly structure of the high-voltage junction unit may be simplified, whereby productivity may be improved. In addition, maintainability may be improved, whereby it is possible to efficiently maintain a fuel cell vehicle.

The invention relates to a method for the commissioning of a fuel cell stack (1), in which the fuel cell stack (1) is commissioned and is supplied with different media during the commissioning and/or operation thereof, the operating state of the fuel cell stack (1) is changed and at least one state variable of the fuel cell stack (1) is acquired. According to the invention, the acquired state variable is calculated in a chemical-physical model of the fuel cell stack (1) or of a fuel cell of the fuel cell stack (1), and at least one model parameter of the model is correspondingly updated. At least one new actuating variable for controlling the media supply and/or the load of the fuel cel stack (1) is subsequently derived from the at least one updated model parameter. The invention further relates to a device for carrying out the method.

A fuel cell system includes: a fuel cell stack including a plurality of cells, each of which has a fuel electrode, an air electrode, and an electrolyte, and performs a power generation by a reaction between a fuel gas and air; a fuel supplier supplying the fuel gas to the fuel electrode; an air supplier supplying the air to the air electrode; a voltage detector detecting the voltage of the fuel cell stack; and a controller stopping the supplying of the fuel gas by the fuel supplier and the supplying of the air by the air supplier when the voltage of the fuel cell stack detected by the voltage detector is decreased to be lower than a threshold voltage after the power generation of the fuel cell stack is stopped.

An output control system includes a first power controller controlling an output of a first power source, a second power controller controlling an output of a second power source, and a controller determining a control mode based on a state of a motor and controlling one or both of the first power controller and the second power controller based on the control mode.

A fuel cell system includes a fuel cell including a plurality of stacked cells, a fuel gas supply unit configured to supply fuel gas to a supply port of the fuel cell and return the fuel gas exhausted through an exhaust port of the fuel cell, and a controller configured to control an operation of the fuel gas supply unit. The controller is configured to execute a drain process for draining residual water accumulated in the fuel cell through the exhaust port. In the drain process, a first process in which the fuel gas is supplied to the fuel cell until a pressure in the fuel cell reaches a predetermined threshold pressure and a second process in which the pressure in the fuel cell is reduced after the first process are repeatedly executed.