| Patent application number | Description | Published |
|---|
| 20160133963 | RESIDUAL WATER SCAVENGING PROCESSING METHOD IN FUEL CELL SYSTEM AND FUEL CELL SYSTEM - A method includes predicting, while fuel cell system is operated, whether or not the outside temperature becomes equal to or less than a first predetermined temperature; performing, when it is predicted that the outside temperature becomes equal to or less than the first predetermined temperature, residual water scavenging processing on only an oxidizer gas supply/discharge mechanism and thereafter stopping the operation of the fuel cell system; predicting, after the stop of the operation of the fuel cell system, whether or not the temperature of a predetermined component included in the fuel cell system becomes equal to or less than a second predetermined temperature; and performing the residual water scavenging processing on the fuel gas supply/discharge mechanism when it is predicted that the temperature of the predetermined component becomes equal to or less than the second predetermined temperature. | 05-12-2016 |
| 20160133967 | OPERATION CONTROL METHOD OF FUEL CELL AND OPERATION CONTROL APPARATUS OF FUEL CELL - The operation control method of a fuel cell includes acquiring a startup temperature of the fuel cell; acquiring a present temperature of the fuel cell; setting a present target operation point of the fuel cell that is identified by an output voltage value and an output current value based on the startup temperature, or based on the startup temperature and the present temperature; controlling at least one of the flow of the reaction gas supplied to the fuel cell, and an output voltage of the fuel cell so that the operation point of the fuel cell becomes the target operation point, and setting the target operation point includes a process of setting an operation point having a low output voltage value as the target operation point when the startup temperature is low as compared to the case when the startup temperature is high, if the present temperature is the same. | 05-12-2016 |
| 20160133971 | FLOW CONTROL METHOD OF COOLING MEDIUM IN A FUEL CELL SYSTEM, AND FUEL CELL SYSTEM - The method comprises: determining whether or not an inlet temperature is equal to or above a lower-limit temperature of a temperature range in which generated water does not freeze within the fuel cell; and adjusting the flow rate of the cooling medium in the circulation flow path to become more than the normal flow rate when it is determined that the inlet temperature is equal to or above the lower-limit temperature, and adjusting the flow rate of the cooling medium in the circulation flow path to be equal to or below the normal flow rate when it is determined that the inlet temperature is not equal to or above the lower-limit temperature. | 05-12-2016 |
| 20160141650 | FUEL CELL SYSTEM - A fuel cell system includes: a fuel cell; a fuel gas path supplied with fuel and allowing a part of fuel gas discharged from the fuel cell to circulate; an exhaust mechanism discharging the reacted fuel gas to an outside; a circulation mechanism circulating the fuel gas; and a control unit configured to temporarily stop circulation of the fuel gas by the circulation mechanism when determining that discharge from the exhaust mechanism is not normal, drive the circulation mechanism so that the fuel gas circulates at a first circulation speed when determining that the discharge is not normal and a parameter relating to water vapor in the fuel gas path is equal to a predetermined value or greater, and drive the circulation mechanism so that the fuel gas circulates at a second circulation speed greater than the first circulation speed when determining that the discharge is normal. | 05-19-2016 |
| 20160141665 | FUEL CELL SYSTEM AND FUEL CELL SYSTEM CONTROL METHOD - To provide technology that is capable of inhibiting a decrease in starting properties of a pump in a low-temperature environment. A fuel cell system is equipped with a control unit, a fuel cell, and a pump. The control unit acquires the temperature of the fuel cell as a parameter expressing the temperature of the pump while operation of the fuel cell is stopped. The control unit rotates rotation body of the pump when it is detected that the temperature of the pump is a threshold value or less set within a predetermined range lower than the freezing point based on the detected temperature of the fuel cell. | 05-19-2016 |
| 20160141671 | WATER DRAINAGE DEVICE FOR FUEL CELL, FUEL CELL SYSTEM, MOVING BODY AND CONTROL METHOD OF FUEL CELL SYSTEM - An object is to provide a technique that suppresses excessive water drainage from a fuel cell. A water drainage device for fuel cell that drains water from inside of a fuel cell, includes: a purge gas supply system; an operation unit; a water drainage controller; and a water content acquirer. The operation unit receives a water drainage command from a user to give an instruction of purging out water from inside of the fuel cell by the purge gas supply system. When the water content obtained by the water content acquirer is equal to or lower than a predetermined value, the water drainage controller performs either one of: (i) a process of invalidating the water drainage command received by the operation unit; and (ii) a process of changing a processing condition of the purge process to decrease an amount of water drained by the purge process, compared with an amount of water drainage when the obtained water content is higher than the predetermined value. | 05-19-2016 |
| 20160141682 | POWER SUPPLY SYSTEM AND VOLTAGE CONTROL METHOD OF FUEL CELL - An object is to maintain the voltage of a fuel cell at a desired voltage level and suppress a voltage variation, even in the case of a low load request. A power supply system including a fuel cell causes at least part of a required electric power to be supplied from the fuel cell in an ordinary load state. In a low load state, the power supply system supplies an amount of oxygen that is required to make the voltage of the fuel cell equal to a predetermined target voltage and that is less than an amount of oxygen supplied to the fuel cell in the ordinary load state, to the fuel cell. In a first low load state, the power supply system sets the target voltage to a first target voltage and supplies oxygen to the fuel cell. After a subsequent shift to a state that the required electric power becomes higher than a predetermined reference value to cause the fuel cell to generate electric power at an output voltage that is higher than the first target voltage, in a further shift to a second low load state, the power supply system sets the target voltage to a second target voltage that is higher than the first target voltage and supplies oxygen to the fuel cell. | 05-19-2016 |
| 20160141685 | Fuel Cell System and Control Method of Fuel Cell System - An objection is to provide a technology by which a decline in the starting performance of a fuel cell system may be controlled in a low-temperature environment. A control method of a fuel cell system includes a temperature acquisition step of acquiring a temperature of the fuel cell at start-up of the fuel cell; and an exhaust gas control step of restricting, when the temperature of the fuel cell is below a predetermined value, a flow rate of an exhaust gas flowing into a flow path configuring portion that configures at least a part of a flow path of the exhaust gas of the fuel cell as compared to the flow rate of the exhaust gas flowing into the flow path configuring portion when the temperature of the fuel cell is equal to or less than the predetermined value. | 05-19-2016 |
