A method and system of controlling hydrogen purge are provided. The method includes estimating an air supply rate supplied to a fuel cell stack and then executing hydrogen purge based on the estimated air supply rate.

A method and system of controlling hydrogen purge are provided. The method includes estimating an air supply rate supplied to a fuel cell stack and then executing hydrogen purge based on the estimated air supply rate.

A fuel cell system includes a fuel cell and a fuel cell controller. The fuel cell controller is configured to control a cooler based on a command from a host controller, the cooler being configured to cool the fuel cell. When a predetermined condition regarding the fuel cell is satisfied, the fuel cell controller controls the cooler according to a procedure predetermined in the fuel cell controller, regardless of the command from the host controller.

A fuel cell system includes a fuel cell and a fuel cell controller. The fuel cell controller is configured to control a cooler based on a command from a host controller, the cooler being configured to cool the fuel cell. When a predetermined condition regarding the fuel cell is satisfied, the fuel cell controller controls the cooler according to a procedure predetermined in the fuel cell controller, regardless of the command from the host controller.

Methods and systems are described for optimizing water discharge in fuel cell vehicles. The system includes a fuel cell stack, a blower for purging water from the fuel cell stack and a controller. The controller detects that an ambient temperature satisfies a threshold temperature. The controller determines the fuel cell vehicle is approaching a stopping location. The controller calculates a water discharge time prediction necessary to purge excess water from the fuel cell stack while the fuel cell vehicle is operating in response to detecting that the ambient temperature satisfies the threshold temperature and the fuel cell vehicle is approaching the stopping location. The water discharge time prediction is calculated based on the blower operating while the fuel cell stack is in at least one of an idle state and a stopped state as the fuel cell vehicle approaches the stopping location.

an apparatus for controlling energy of a fuel cell vehicle, which may expand a usable range of an energy consuming device, may increase efficiency of heating and cooling, and may simplify a layout of the device. The apparatus includes a stack cooling line having a first coolant heated by a fuel cell stack and cooled by a first heat exchanger; a resistor cooling line having a second coolant heated by a braking resistor and cooled by a second heat exchanger; and a third heat exchanger configured to exchange heat between the first coolant of the stack cooling line and the second coolant of the resistor cooling line.

A fuel cell vehicle is mounted with a fuel cell system including a fuel cell stack and a battery. The fuel cell vehicle controls operation of the fuel cell system with an ECU, to perform standby power generation from activation to when travel is allowed and to perform power generation during operation of the fuel cell vehicle after travel has been allowed. In an activation method, the power generation current is increased in accordance with a low-temperature efficiency rate during the power generation during operation, the battery is charged and the power generation current is increased in accordance with a standby current increase rate that is lower than the low-temperature efficiency rate during the standby power generation.

A fuel cell system includes fuel cell, an electrical storage device that stores electric power generated by the fuel cell, and a control device that controls generation of power by the fuel cell, that acquires a charging rate of the electrical storage device, when the electric power in the electrical storage device is supplied to external devices, the control device performs first control which increases a charging rate of the electrical storage device and second control which restricts a power generation amount of the fuel cell to be smaller than in the first control and decreases a charging rate of the electrical storage device, and when a temperature detected by the temperature sensor is lower than a predetermined temperature, a power generation amount per hour of the fuel cell in the first control is reduced in comparison when the detected temperature is equal to or greater than the predetermined temperature.

A fuel cell system includes fuel cell, an electrical storage device that stores electric power generated by the fuel cell, and a control device that controls generation of power by the fuel cell, that acquires a charging rate of the electrical storage device, when the electric power in the electrical storage device is supplied to external devices, the control device performs first control which increases a charging rate of the electrical storage device and second control which restricts a power generation amount of the fuel cell to be smaller than in the first control and decreases a charging rate of the electrical storage device, and when a temperature detected by the temperature sensor is lower than a predetermined temperature, a power generation amount per hour of the fuel cell in the first control is reduced in comparison when the detected temperature is equal to or greater than the predetermined temperature.

The present disclosure relates to a method of recovering performance of a fuel cell stack in a fuel cell system of a vehicle. The method includes determining whether the fuel cell stack is in a state in which a stack performance recovery operation is possible based on information collected from the vehicle using a predetermined stack state determination criterion, determining whether the vehicle is in a state in which the stack performance recovery operation is possible based on operation information of a fuel cell system, and performing the stack performance recovery operation upon determining that the fuel cell stack is in the state in which the stack performance recovery operation is possible and that the vehicle is in the state in which the stack performance recovery operation is possible.