A method for performing one or more proactive remedial actions to prevent anode flow-field flooding in an anode side of a fuel cell stack at low stack current density. The method includes identifying one or more trigger conditions that could cause the anode flow-field to flood with water, and performing the one or more proactive remedial actions in response to the identified trigger conditions that removes water from the anode side flow-field prior to the anode flooding occurring.

A fuel cell system that generates electric power by supplying anode gas and cathode gas to a fuel cell includes a control valve adapted to control the pressure of the anode gas to be supplied to the fuel cell; a buffer unit adapted to store the anode-off gas to be discharged from the fuel cell; a pulsation operation unit adapted to control the control valve in order to periodically increase and decrease the pressure of the anode gas at a specific width of the pulsation; and a pulsation width correcting unit adapted to correct the width of the pulsation on the basis of the temperature of the buffer unit.

The fuel cell device includes an electrode assembly. A gas diffusion layer is on each side of the electrode assembly. A solid, non-porous plate is adjacent each of the gas diffusion layers. A hydrophilic soak up region is near an inlet portion of at least one of the gas diffusion layers. The hydrophilic soak up region is configured to absorb liquid water from the electrode assembly when the fuel cell device is shutdown.

A voltage control method for a fuel cell may include: interrupting electrical connection between the fuel cell and a load in a low load state; supplying oxygen to the fuel cell in accordance with a preset condition during the electrical connection is interrupted; detecting an OCV of the fuel cell after oxygen is supplied to the fuel cell in accordance with the preset condition; reducing an amount of oxygen supplied to the fuel cell when the OCV is higher than a target voltage by a first value or larger; increasing the amount of oxygen when the OCV is lower than the target voltage by a second value or larger; and keeping the amount of oxygen when the OCV is lower than a sum of the target voltage and the first value and higher than a value obtained by subtracting the second value from the target voltage.

There is provided a fuel cell humidification device of a fuel cell motorcycle. When a fuel cell managing device demands to perform a humidification treatment for humidifying an electrolyte film of an air-cooled type solid polymer fuel cell or the humidification treatment is being performed, a humidification permission deciding portion decides whether an inclination of the fuel cell motorcycle is equal to or greater than an inclination threshold, and then permits to perform or continue to perform the humidification treatment if the inclination is not equal to or greater than the inclination threshold, and does not permit to perform or continue to perform the humidification treatment if the inclination is equal to or greater than the inclination threshold.

A fuel cell system includes a fuel cell stack, a fuel gas supply channel, a circulation passage, a purge valve, and a temperature sensor. A method of operating the fuel cell system performs a judging step of determining whether or not the temperature detected by the temperature sensor is at or below a given temperature. Then, if the temperature is at or below the given temperature, the method performs a purge valve scavenging process step of intermittently opening and closing the purge valve multiple times, while supplying the fuel gas through the fuel gas supply channel.

A fuel cell system includes: a fuel cell; a temperature acquisition unit that acquires a temperature at a specific position in a vehicle equipped with the fuel cell system; a purge unit that purges the fuel cell when an operation of the fuel cell is stopped; and a control unit that acquires the temperature at the specific position from the temperature acquisition unit at least once from when the fuel cell system is stopped until the fuel cell system is started again, and uses the temperature at the specific position to determine whether purging at a stop by the purge unit is necessary when the fuel cell system is stopped next.

Provide is a fuel cell system capable of controlling the timing of a water removal process to suppress users' uncomfortableness. A fuel cell system with which a vehicle is equipped includes: a fuel cell; a water removal process gas supply part; a current location information acquisition part; a destination information acquisition part; and a water removal process control part, wherein the water removal process control part changes a state thereof to a water removal process allowed state if at least one of predetermined conditions is satisfied, the water removal process control part performs the water removal process if the distance from the current location to the destination is at a second threshold or under in the water removal process allowed state, and the water removal process control part sets the state thereof in a water removal process prohibited state after performing the water removal process.

A fuel cell system includes: a fuel cell that is supplied with a reaction gas to generate electricity; a plurality of auxiliary components used for power generation of the fuel cell; and a control device that causes the fuel cell to generate electricity when a predetermined scavenging start condition is satisfied and controls the auxiliary components using electric power generated by the fuel cell to perform a scavenging process of removing water in a flow path of the reaction gas using the reaction gas, during a stop period in which electric power is not supplied to a load from the fuel cell system.

Proposed are a fuel cell system and a method of controlling the fuel cell system. The fuel cell system includes: a hydrogen supply unit connected to a hydrogen inlet side of a fuel cell stack, with a supply valve and a sensor being provided in the hydrogen supply unit; a hydrogen discharge unit connected to a hydrogen outlet side of the fuel cell stack, with a water trap and a purge valve being provided in the hydrogen discharge unit; and a controller configured to calculate an amount of hydrogen discharged through the purge valve from an amount of hydrogen supplied to the fuel cell stack and an amount of hydrogen consumed therein, and to perform compensation control of the supply valve when the amount of the discharged hydrogen is at or above a reference value.