Patent application number | Description | Published |
20100276024 | SAFETY VALVE DEVICE, VALVE APPARATUS, HIGH-PRESSURE GAS TANK, AND VEHICLE - A safety valve device has a safety valve body configured to include a valve mechanism opened at a temperature of or over a preset reference temperature. The safety valve device also includes a gas flow path arranged to make a flow of hydrogen flowing out of a hydrogen tank via the safety valve body in a valve open position of the valve mechanism, and a discharge pipe configured to have a hydrogen discharge opening and arranged to discharge the hydrogen flowing through the gas flow path to the outside. The hydrogen discharge opening of the discharge pipe is formed to discharge the hydrogen in an oblique direction relative to a direction of an axial center of the gas flow path. The discharge pipe also has a groove formed to apply an input rotational force to the discharge pipe and thereby rotate the discharge pipe around the axial center of the gas flow path. In a typical application of a high-pressure gas tank with such a safety valve device mounted on a vehicle, this arrangement of the safety valve device enables the discharge direction of the high-pressure gas that is discharged from the safety valve device to be readily adjusted. | 11-04-2010 |
20120183873 | FUEL CELL SYSTEM - A fuel cell system acquires an operation state of a fuel cell and estimates an IV characteristic that indicates a relationship between a current and a voltage in the fuel cell. At least one of a resistance overvoltage, an activation overvoltage, a current-voltage hysteresis and a concentration overvoltage of the fuel cell is determined from the operation state of the fuel cell, and the IV characteristic is estimated based on the determined result. | 07-19-2012 |
20150017485 | FUEL CELL SYSTEM - A fuel cell system comprising a fuel cell and a secondary cell as power supply sources to a load, in which, during normal operation, a first control part allows a first converter (boost converter at the fuel cell side) to control an output voltage of the fuel cell and a second control part allows a second converter (boost converter at the secondary cell side) to control an output voltage to a first load side, whereas during an occurrence of an abnormality of the secondary cell, the first control part allows the first converter to control an output voltage thereof and the second control part allows the second converter to control an output voltage to a second load side. | 01-15-2015 |
20150217660 | FUEL CELL SYSTEM - A fuel cell system according to the present invention comprises: a fuel cell and a secondary battery, each acting as a power supply source; a first converter a second converter provided between the fuel cell and the secondary battery and first and second loads; a first inverter provided between the first and second converters and the first load and a second inverter provided between the first and second converters and the second load; a first controller that controls an output of the fuel cell by controlling the first converter; and a second controller configured separately from the first controller, the second controller controlling the second converter, the first inverter and the second inverter to thereby control outputs supplied to the first inverter and the second inverter, including an output from the secondary battery. The first and second controllers are connected so as to be able to communication with each other regarding failure information on respective control targets. If one of the first controller and the second controller receives the failure information sent from the other, the first controller or the second controller that has received the failure information stops operation of the control target thereof. | 08-06-2015 |
20160132035 | FUEL CELL SYSTEM AND METHOD OF CONTROLLING FUEL CELL - A fuel cell system in which power generation is performed by a fuel cell, comprising: a power generation controller that performs: first control in which at least one of power control for preventing generated power from exceeding an upper limit value, voltage control for preventing generated voltage from falling below a lower limit value and current control for preventing generated current from exceeding an upper limit value is performed and second control in which the generated voltage is prevented from exceeding an upper limit value; and a priority instructor that instructs the power generation controller to prioritize the first control over the second control when the first control and the second control collide with each other. | 05-12-2016 |
20160133974 | FUEL CELL SYSTEM AND CONTROL METHOD OF FUEL CELL SYSTEM - A fuel cell system includes: a fuel cell outputting a current; a supply unit supplying oxidant gas; a flow-amount measurement unit measuring a flow amount of the oxidant gas; and a controller that feed-back controls the supply unit such that a measured flow-amount value converges toward a target flow-amount value, wherein the controller determines an acceptable current value in accordance with the measured flow-amount value, restricts the current to the acceptable current value or less, controls the current in accordance with a requested current value of the fuel cell; and performs a changing-suppression processing, when a condition continues for a predetermined period, the condition including that a changing width of the requested current value is equal to or less than a first value and a difference between the requested current value and the acceptable current value is equal to or less than a second value. | 05-12-2016 |
20160141667 | FUEL CELL SYSTEM AND OPERATION CONTROL METHOD OF THE SAME - The present invention enables the determination of an operating point of a fuel cell so as to prioritize the fulfillment of an amount of required power generation while avoiding various limitations, such as a current limit, in a fuel cell system that warms up the fuel cell by a low efficiency operation. | 05-19-2016 |
20160141673 | FUEL CELL SYSTEM, FUEL CELL VEHICLE, AND CONTROL METHOD FOR FUEL CELL SYSTEM - A fuel cell system mounted in a vehicle includes a fuel cell supplying electric power to a motor driving the vehicle, a pump supplying oxygen to the fuel cell, an accelerator position detection unit detecting an accelerator depression amount of the vehicle, and a control unit calculating electric power required to be generated by the fuel cell and electric power required for driving of the pump based on the accelerator depression amount and controlling the pump based on the electric power required for the driving, in which the control unit calculates the electric power required for the driving such that a rate of increase in the electric power required for the driving exceeds a rate of increase in the electric power required to be generated when the calculated electric power required to be generated increases. | 05-19-2016 |
20160141675 | FUEL CELL SYSTEM AND OPERATION CONTROL METHOD OF THE SAME - The present invention provides a technique capable of satisfying both the restoration of an output voltage of a fuel cell and an improvement of electric power responsiveness in a fuel cell system in a situation in which its operation status is restored to a normal operation from an operation having low power generation efficiency. | 05-19-2016 |
20160141689 | FUEL CELL SYSTEM AND FUEL CELL CONTROL METHOD - A fuel cell system comprising: a power generation controller that controls a value subject to control, which is a value exhibiting a power generating state by a fuel cell and is a value that is affected by alternating current applied to the fuel cell, to approach a target value; a dead zone setter that sets a dead zone with the target value as a reference; and, a stopper that stops the control by the power generation controller when the value subject to control is contained in the dead zone. | 05-19-2016 |
20160141691 | FUEL CELL SYSTEM - A fuel cell system includes: a fuel cell; a coolant path connected to the fuel cell and allowing a coolant that cools the fuel cell to flow therethrough; a temperature detection unit configured to detect a temperature of the coolant in the coolant path; a temperature correction unit configured to calculate a temperature correction value by correcting the temperature of the coolant detected by the temperature detection unit; and a lower limit voltage control unit configured to control a lower limit voltage of the fuel cell based on the temperature correction value, wherein the temperature correction unit calculates the temperature correction value based on a following equation: | 05-19-2016 |