Abstract: An output voltage prediction system for a fuel cell includes: a storage unit that stores a relationship between a logarithm of a cumulative deterioration index amount and an output voltage of the fuel cell when an output current of the fuel cell is within a predetermined current range, the cumulative deterioration index amount being a cumulative amount of a deterioration index amount related to progress of deterioration of the fuel cell; an input data acquisition unit that acquires the cumulative deterioration index amount of the fuel cell as input data; and a prediction unit that converts the input data acquired by the input data acquisition unit into a logarithm and predicts the output voltage of the fuel cell based on the logarithm of the input data and the relationship stored in the storage unit.

Abstract: In estimation of a future state of a first product (an estimation-target individual), a first estimated extrapolation value is calculated from data (data 2) on a past side of data relevant to the first product, and a second estimated extrapolation value is calculated from data (data 1) relevant to a second product (a same-type different-individual of the estimation-target individual) that is different from the first product. A synthesis ratio between the first estimated extrapolation value and the second estimated extrapolation value is decided from data (data 3) on a present side of the data relevant to the first product, and an estimation value is calculated by performing synthesis between the first estimated extrapolation value and the second estimated extrapolation value based on the decided synthesis ratio.

Abstract: A processing method for a fuel cell system including a fuel cell stack configured to generate electric power when supplied with an anode gas and a cathode gas is started in a state in which the fuel cell stack is not supplied with the anode gas and the cathode gas and generation of electric power in the fuel cell stack is stopped. The processing method includes: a first process of starting supply of the cathode gas; a second process of starting supply of an inert gas to an anode when a voltage of the fuel cell stack increases and then becomes equal to or less than a predetermined first voltage; and a third process of stopping the supply of the inert gas when the voltage of the fuel cell stack increases and then becomes equal to or less than a predetermined second voltage after the second process.

Abstract: A processing method for a fuel cell system including a fuel cell stack configured to generate electric power when supplied with an anode gas and a cathode gas is started in a state in which the fuel cell stack is not supplied with the anode gas and the cathode gas and generation of electric power in the fuel cell stack is stopped. The processing method includes: a first process of starting supply of the cathode gas; a second process of starting supply of an inert gas to an anode when a voltage of the fuel cell stack increases and then becomes equal to or less than a predetermined first voltage; and a third process of stopping the supply of the inert gas when the voltage of the fuel cell stack increases and then becomes equal to or less than a predetermined second voltage after the second process.

Abstract: A MEA is set in a state where a hydrogen gas is continuously supplied to both an anode-side electrode and a cathode-side electrode. In this state, a current is applied from an external power supply unit to the anode-side electrode and the cathode-side electrode so that the cathode-side electrode has a higher potential and that the current value gradually increases. Upon applying the current in this way, measured voltages between both electrodes measured by a voltage measurement unit are plotted in time series, thereby measuring the voltage transition across the inspection object MEA. A power generation performance inspection of the inspection object MEA is carried out based on the measured voltage transition.

Abstract: A fuel-cell vehicle includes a fuel cell, a secondary battery, a drive motor that is supplied with electric power from the fuel cell and the secondary battery, and a controller that controls electric power which is supplied from the fuel cell and the secondary battery to the drive motor. The controller is configured to charge the secondary battery such that a state of charge of the secondary battery is maintained in a predetermined range when it is predicted that the fuel-cell vehicle is to travel on an uphill road and to supply at least a part of the electric power, which is supplied to the drive motor when the fuel-cell vehicle travels on the uphill road, from the secondary battery.

Abstract: A power supply system includes a fuel cell system having a fuel cell that is mounted on a vehicle, and a controller for controlling the fuel cell system. The controller performs control to operate the fuel cell by switching as appropriate between a driving mode in which the vehicle travels, and an external power supply mode for supplying electric power to an external load. In the driving mode, a first voltage is set as a high-potential avoiding voltage, and in the external power supply mode, a second voltage that is higher than the first voltage is set as the high-potential avoiding voltage.

Abstract: Disclosed are: a fuel cell which is provided with a membrane electrode assembly (50), an anode-side gas diffusion layer (52) and a cathode-side gas diffusion layer (54); and a method for manufacturing the cell. The degree of processing for suppressing protrusion of carbon fibers in the anode-side gas diffusion layer (52) and the degree of processing for suppressing protrusion of carbon fibers in the cathode-side gas diffusion layer (54) are set to be different from each other. Specifically, protrusion from the anode-side gas diffusion layer (52) is sufficiently suppressed, thereby being prevented from damaging the membrane electrode assembly (50). Meanwhile, the degree of suppression processing of the cathode-side gas diffusion layer (54) is set low, thereby securing drainage of generated water.

Abstract: A MEA is set in a state where a hydrogen gas is continuously supplied to both an anode-side electrode and a cathode-side electrode. In this state, a current is applied from an external power supply unit to the anode-side electrode and the cathode-side electrode so that the cathode-side electrode has a higher potential and that the current value gradually increases. Upon applying the current in this way, measured voltages between both electrodes measured by a voltage measurement unit are plotted in time series, thereby measuring the voltage transition across the inspection object MEA. A power generation performance inspection of the inspection object MEA is carried out based on the measured voltage transition.

Abstract: A power supply system includes a fuel cell system having a fuel cell that is mounted on a vehicle, and a controller for controlling the fuel cell system. The controller performs control to operate the fuel cell by switching as appropriate between a driving mode in which the vehicle travels, and an external power supply mode for supplying electric power to an external load. In the driving mode, a first voltage is set as a high-potential avoiding voltage, and in the external power supply mode, a second voltage that is higher than the first voltage is set as the high-potential avoiding voltage.

Abstract: Disclosed are: a fuel cell which is provided with a membrane electrode assembly (50), an anode-side gas diffusion layer (52) and a cathode-side gas diffusion layer (54); and a method for manufacturing the cell. The degree of processing for suppressing protrusion of carbon fibers in the anode-side gas diffusion layer (52) and the degree of processing for suppressing protrusion of carbon fibers in the cathode-side gas diffusion layer (54) are set to be different from each other. Specifically, protrusion from the anode-side gas diffusion layer (52) is sufficiently suppressed, thereby being prevented from damaging the membrane electrode assembly (50). Meanwhile, the degree of suppression processing of the cathode-side gas diffusion layer (54) is set low, thereby securing drainage of generated water.