Patent application number | Description | Published |
20160133960 | FUEL CELL SYSTEM - A fuel cell system includes: a fuel cell that includes a membrane electrode assembly clipping an electrolyte membrane with an anode and a cathode; a fuel gas supplier that supplies an anode gas to the anode via an anode gas supply passage in accordance with a power generation request for the fuel cell; a circulation pump that circulates an exhaust gas discharged from the anode to the anode gas supply passage; a judger that judges whether any one of a temperature of the circulation pump and a temperature associated with the temperature of the circulation pump is equal to or less than a prescribed temperature; and a drive controller that drives the circulation pump at a prescribed rotation number when the judger judges that any one of the temperatures is equal to or less than the prescribed temperature, and there is no power generation request for the fuel cell. | 05-12-2016 |
20160133962 | FUEL CELL SYSTEM AND VEHICLE EQUIPPED WITH FUEL CELL - A fuel cell system used in a vehicle equipped with a fuel cell includes: a fuel cell; a fuel gas supply portion which supplies a fuel gas to the fuel cell; a fuel gas discharge portion which discharges exhaust fuel gas from the fuel cell; and a control unit, in which, when an operation of the fuel cell is ended, the control unit performs (a) an exhaust process of discharging the exhaust fuel gas of the fuel cell to reduce a pressure, and (b) a process of increasing a partial pressure of the fuel gas in the fuel cell by supplying the fuel gas to the fuel cell after the exhaust process. | 05-12-2016 |
20160133965 | Fuel Cell System, Fuel Cell Vehicle, and Control Method for Fuel Cell System - A fuel cell system includes: a power supply circuit including a fuel cell and a secondary battery; an oxidant gas supply flow passage; a pump; and a control unit configured to drive the pump and dilute hydrogen retained in an cathode. The control unit is configured to stop supplying an oxidant gas to the cathode by stopping an operation of the pump such that dilution of the hydrogen retained in the cathode is stopped, while the fuel cell vehicle remains stationary after a starter switch of the fuel cell vehicle is switched from an off state to an on state, or while a load required of the power supply circuit remains smaller than a predetermined value after the starter switch of the fuel cell vehicle is switched from the off state to the on state. | 05-12-2016 |
20160133970 | FUEL CELL SYSTEM AND CONTROL METHOD OF FUEL CELL SYSTEM - In order to provide a fuel cell system that inhibits the occurrence of degradation of an MEA while also inhibiting an increase in the CPU load. A fuel cell system is equipped with a hydrogen supply unit that supplies hydrogen to a fuel cell, a pressure detection unit that detects the internal pressure of hydrogen supply piping, a current detection unit that detects the current value of the fuel cell, and a control unit that calculates the necessary hydrogen supply volume for the fuel cell based on the detected current value and pressure value, and controls the hydrogen supply unit to supply hydrogen corresponding to the calculated hydrogen supply unit to the fuel cell, wherein the control unit calculates the hydrogen supply volume based on the pressure value and the current value for each of a first cycle, and acquires the pressure value and supplies hydrogen corresponding to the immediately prior calculated hydrogen supply volume to the fuel cell when the control unit is determined that supply of hydrogen is necessary based on the acquired pressure value, for each of a second cycle which shorter than the first cycle. | 05-12-2016 |
20160133972 | FUEL CELL SYSTEM - A fuel cell system includes: a fuel cell; a fuel supply source; a supply passage; a circulation passage; a gas-liquid separator; a discharge passage; a discharge valve; a differential pressure detecting portion; and a control unit, wherein the control unit estimates a flow rate of a fuel gas. | 05-12-2016 |
20160133975 | FUEL CELL SYSTEM - When a current value is not greater than a reference value, a control unit estimates a discharge amount of a fuel gas based on a lost amount of the fuel gas and a consumed amount by electrical generation of the fuel gas, the lost amount being calculated based on a decrease rate of pressure in a supply passage during an opening period of a discharge valve, the consumed amount by electrical generation being calculated based on the current value during the opening period, and when the current value is greater than the reference value, the control unit estimates the discharge amount based on the differential pressure during the opening period. | 05-12-2016 |
20160141656 | FUEL CELL SYSTEM AND CONTROL METHOD THEREFOR - There are provided a an anode-side water discharge controller that controls a circulation flow rate of the anode gas pump so as to discharge anode-side liquid water residing in the anode-side flow path, and a cathode-side water discharge controller that controls a supply flow rate of the cathode gas pump so as to discharge cathode-side liquid water residing in the cathode-side flow path. The anode-side water discharge controller and the cathode-side water discharge controller execute water discharge by running a pre-selected one of the anode gas pump and the cathode gas pump, and then running the other of the anode gas pump and the cathode gas pump. | 05-19-2016 |
20160141659 | FUEL CELL SYSTEM - A fuel cell system includes a control unit that estimates a discharge amount of the fuel gas partially discharged from the fuel cell partially discharged during an opening period of the discharge valve based on a lost amount of the fuel gas during the opening period and a consumed amount of the fuel gas by electric generation of the fuel cell during the opening period, wherein a pressure increase period during which the pressure increases and a pressure decrease period during which the pressure decreases exist due to intermittent injection of the fuel gas, and the control unit estimates the lost amount of the fuel gas based on a decrease rate of the pressure during the pressure decrease period within the opening period, and based on an assumed decrease rate of the pressure during the pressure increase period within the opening period. | 05-19-2016 |
20160141660 | FUEL CELL SYSTEM AND CONTROL METHOD THEREFOR - A fuel cell system includes: a fuel cell; an anode gas supply flow path for supplying an anode gas to the fuel cell; an anode gas discharge flow path for discharging an anode off gas from the fuel cell; an anode gas circulation flow path for connecting the anode gas supply flow path and the anode gas discharge flow path to each other; a circulation device provided on the anode gas circulation flow path and serving for supplying the anode off gas to the anode gas supply flow path; and a controller. When liquid water is residing in the circulation device, the controller controls a circulation flow rate of the circulation device to discharge the liquid water residing in the circulation device. The controller restricts an increasing rate of the circulation flow rate of the circulation device if it is decided that a quantity of the liquid water residing in the circulation device is equal to or more than a specified value. | 05-19-2016 |
20160141687 | FUEL CELL SYSTEM, FUEL CELL-MOUNTED VEHICLE AND METHOD OF CONTROLLING FUEL SYSTEM - When a first timing at which a fuel gas is injected to a fuel gas supply flow path by an injector and a second timing at which water residing on a circulation flow path is discharged by controlling rotating speed of a circulation pump coincide with each other, a controller performs either: (i) a first process of operating the circulation pump at a preset RPM without injecting the fuel gas to the fuel gas supply flow path by the injector; or (ii) a second process of injecting the fuel gas to the fuel gas supply flow path by the injector and operating the circulation pump at an RPM lower than the preset RPM. | 05-19-2016 |