| Patent application number | Description | Published |
|---|
| 20080257621 | FUEL CELL VEHICLE SYSTEM - A fuel cell vehicle system includes: a propulsion motor capable of driving a vehicle; a fuel cell which generates electric power by supplying a reactant gas to give an electrochemical reaction; an energy storage device which is charged by a generated output of the fuel cell and regenerative electric power of the propulsion motor; an output control device which controls an output current of the fuel cell; and a control device which calculates the regenerative electric power which can be generated by a regenerative operation of the propulsion motor as well as a chargeable power which can be charged to the energy storage device, controls the output control device so that the output current of the fuel cell is restricted when the chargeable power is less than the regenerative electric power, and controls the output control device so that restriction on the output current of the fuel cell is canceled when the chargeable power is equal to or greater than the regenerative electric power. | 10-23-2008 |
| 20090166114 | METHOD OF DRIVING DC/DC CONVERTER, METHOD OF CONTROLLING DC/DC CONVERTER APPARATUS, METHOD OF CONTROLLING DRIVING OPERATION OF VEHICLE, AND METHOD OF DRIVING FUEL CELL SYSTEM - Under the same target voltage, a basic duty ratio depending on a target ON time is set, and prior and subsequent duty ratios before and after upper arm switching devices or lower arm switching devices are driven with the basic duty ratio are set as a basic duty ratio+α and a basic duty ratio−α, respectively. Gate drive signals, having the basic duty ratio and the prior and subsequent duty ratios, are supplied to the upper arm switching devices or to the lower arm switching devices, in order to turn on the upper arm switching devices or the lower arm switching devices. | 07-02-2009 |
| 20100248051 | METHOD OF CONTROLLING OUTPUT OF FUEL CELL SYSTEM AND VEHICLE WITH FUEL CELL SYSTEM - A fuel cell system has different allowable changes per unit time in an operation range of a fuel cell, in both a first output range of the fuel cell and a second output range of the fuel cell, the second output range being lower than the first output range. The allowable change per unit time in the output of the fuel cell in the second output range is smaller than the allowable change per unit time in the output of the fuel cell in the first output range. | 09-30-2010 |
| 20100332063 | FUEL CELL VEHICLE - A fuel cell vehicle comprises a motor, a fuel cell, a first DC/DC converter, and a first converter control unit. The first DC/DC converter performs a boosting operation when the fuel cell vehicle runs in a non-stationary state, and does not perform the boosting operation during the vehicle runs in a stationary state. | 12-30-2010 |
| 20110003223 | METHOD OF CONTROLLING FUEL CELL VEHICLE AND FUEL CELL SYSTEM - A fuel cell vehicle is controlled by performing a rate limiting control process for reducing electric power generated by a fuel cell to reduce a frequency at which a voltage generated by the fuel cell is equal to or higher than a predetermined voltage when electric power requested by a load is lowered, and changing a rotational speed of an air pump depending on the electric power requested by the load when the electric power generated by the fuel cell is reduced. | 01-06-2011 |
| Patent application number | Description | Published |
|---|
| 20080297113 | ELECTRIC POWER SUPPLY SYSTEM - An electric power supply system can determine a sharing ratio of an electric power so as to increase and decrease an output electric power supplied by an electric power generator in accordance with an output electric power value required for the electric power supply system, in a fuel cell following region where a frequency of a magnitude of the electric power is equal to or higher than a predetermined value in a frequency distribution of a magnitude of the electric power, and can determine the sharing ratio of the electric power so as to increase an output electric power supplied by an electricity storage device, in an assist region where the frequency is lower than a predetermined value in the frequency distribution, and can prevent an excess of discharging from an electricity storage device. | 12-04-2008 |
| 20080308329 | FUEL CELL VEHICLE - A fuel cell vehicle capable of improving energy efficiency by reducing switching loss is provided. The fuel cell vehicle includes: a fuel cell that generates direct current power; inverters which respectively include switching elements and convert the direct current power generated by the fuel cell into alternating current power; a diode that prevents current from flowing from the inverters toward the fuel cell; a step up/down DC/DC converter that adjusts the voltage of the cathode side of the diode; a voltage control part that controls the step up/down DC/DC converter, thereby controlling current output from the fuel cell; and a stop and idle determination part that stops the supply of air to the fuel cell, thereby stopping idling of the fuel cell. The voltage control part reduces the voltage of the cathode side of the diode as the voltage of the fuel cell is reduced by activating the stop and idle determination part. | 12-18-2008 |
| 20090008166 | ELECTRIC SYSTEM FOR FUEL CELL, FUEL CELL VEHICLE, AND METHOD OF SUPPLYING ELECTRIC POWER - An electric system has a fuel cell for generating electric power by being supplied with a reactive gas, an electric storage device having a voltage lower than a voltage output from the fuel cell, a first power supply line connected to the fuel cell, a second power supply line connected to the electric storage device, a first electric accessory serving as at least part of a fuel cell accessory for operating the fuel cell, a first DC-to-DC converter for performing bidirectional voltage conversion between the first power supply line and the second power supply line and a second DC-to-DC converter for lowering a voltage for supply electric power to the first electric accessory. | 01-08-2009 |
| 20090008167 | FUEL CELL VEHICLE, AND METHOD OF SUPPLYING ELECTRIC POWER - A fuel cell vehicle has a fuel cell for generating electric power by being supplied with a reactive gas, an electric storage device, a first power supply line connected to the fuel cell, a second power supply line connected to the electric storage device, and a main DC-to-DC converter for performing bidirectional voltage conversion between the first power supply line and the second power supply line, an electric motor to propel the vehicle and a first electric accessory connected to the first power supply line, a second electric accessory having at least a portion connected to the second power supply line. | 01-08-2009 |
