Patent application number | Description | Published |
20080226957 | Fuel cell system - The present invention provides a technology related to a fuel cell system capable of adjusting a discharge amount of an odorant discharged to an outside of a moving body according to a state of the moving body. The fuel cell system mounted to a moving body includes: a fuel cell which generates electric power by electrochemically reacting a hydrogen gas with an oxidation gas; and a adjusting portion which adjusts an amount of an odorant to be discharged to an outside of the moving body according to a state of the moving body, the odorant being included in an anode off-gas discharged from an anode side of the fuel cell. | 09-18-2008 |
20090096464 | Electrical leakage detecting device for a fuel cell system - An electrical leakage determining circuit determines the occurrence of electrical leakage at a negative electrode of a fuel cell when a potential difference V between a positive electrode of the fuel cell and ground, which is detected by a potential difference detecting circuit, exceeds a preset potential difference threshold Vth, and determines the occurrence of electrical leakage at the positive electrode of the fuel cell when an insulation resistance R between the positive electrode of the fuel cell and ground, which is detected by a resistance detection circuit, falls below a resistance threshold Rth preset to be equal to or smaller than a resistance value Rw of a coolant. Upon determination of the occurrence of electrical leakage, the electrical leakage determining circuit opens a switching contact provided on a power supply line to interrupt power supply from the fuel cell to various power consumption components. | 04-16-2009 |
20090325013 | FUEL CELL SYSTEM - A fuel cell system includes a hydrogen path for supplying odorant-added hydrogen to the fuel cell, an estimating unit to estimate the depositing of the odorant in the fuel cell, and control unit to heat the fuel cell up to a temperature at which at least part of the odorant deposited in the fuel cell evaporates when-the depositing of the odorant is estimated. | 12-31-2009 |
20100101306 | ODORANT ADDITION DEVICE AND FUEL GAS SUPPLY SYSTEM - An odorant addition device for adding odorant to fuel gas in a gas system that consumes the fuel gas, the device including: an addition unit for adding the odorant to fuel gas to be consumed by the gas system; an environmental condition detection unit for detecting in the gas system an environmental condition regarding diffusion of odorant in fuel gas; and an addition adjustment unit for adjusting mode of odorant addition by the addition unit based on the environmental condition detected by the environmental condition detection unit. In this way, it is possible to detect leakage of fuel gas more reliably and improve safety dramatically, in a gas system that consumes the fuel gas as fuel. | 04-29-2010 |
20110053028 | Fuel cell system - The present invention provides a technology related to a fuel cell system capable of adjusting a discharge amount of an odorant discharged to an outside of a moving body according to a state of the moving body. The fuel cell system mounted to a moving body includes: a fuel cell which generates electric power by electrochemically reacting a hydrogen gas with an oxidation gas; and a adjusting portion which adjusts an amount of an odorant to be discharged to an outside of the moving body according to a state of the moving body, the odorant being included in an anode off-gas discharged from an anode side of the fuel cell. | 03-03-2011 |
20130189593 | HYDROGEN SUPPLY APPARATUS AND FUEL GAS SUPPLY APPARATUS - Disclosed is a hydrogen supply apparatus which can mix an odorant with hydrogen gas even at a low temperature and can detect the leakage of the hydrogen gas. The apparatus comprises a gas storage means for storing hydrogen gas therein, an odorant-addition means for adding an odorant to the hydrogen gas fed from the gas storage means, and a temperature control means for controlling the temperature of at least one of the hydrogen gas stored in the gas storage means, the hydrogen gas fed from the gas storage means and the odorant. | 07-25-2013 |
Patent application number | Description | Published |
20080197832 | Electrical Leakage Detection Apparatus and Electrical Leakage Detection Method For Fuel Cell - An electrical leakage detection apparatus for a fuel cell includes a voltage detector that detects a voltage applied to coolant in a fuel cell; an electrical leakage determining portion that determines that electrical leakage has occurred when the voltage detected by the voltage detector is equal to or higher than a voltage threshold value; a resistance value detector that detects a resistance value of the coolant in the fuel cell; and a correction portion that corrects the voltage threshold value such that the voltage threshold value is increased with an increase in the resistance value detected by the resistance value detector. | 08-21-2008 |
20090035612 | FUEL CELL SYSTEM - In a fuel cell system of the invention, a hydrogen leakage detection process closes a shutoff valve, which shuts off a supply of hydrogen from a hydrogen supply unit into a hydrogen supply flow path, and opens a pressure regulator, which reduces a pressure of hydrogen in the hydrogen supply flow path, so as to keep the hydrogen supply flow path in a state with no pressure regulation and make the fuel cell system in a leakage detectable state. In this leakage detectable state, the hydrogen leakage detection process measures at least one of a pressure and a flow rate as a state quantity of hydrogen in the hydrogen supply flow path that feeds the supply of hydrogen to fuel cells. The hydrogen leakage detection process analyzes a detected behavior of the state quantity in the leakage detectable process and specifies the occurrence of a hydrogen leakage in the downstream of the hydrogen supply unit. This arrangement enables highly accurate detection of a hydrogen leakage in the fuel cell system with the pressure regulator provided in the hydrogen supply flow path. | 02-05-2009 |
20090110990 | HYDROGN SUPPLY APPARATUS AND FUEL GAS SUPPLY APPARATUS - Disclosed is a hydrogen supply apparatus which can mix an odorant with hydrogen gas even at a low temperature and can detect the leakage of the hydrogen gas. The apparatus comprises a gas storage portion which stores hydrogen gas therein, an odorant-addition portion which adds an odorant to the hydrogen gas fed from the gas storage portion, and a temperature control portion which controls the temperature of at least one of the hydrogen gas stored in the gas storage portion, the hydrogen gas fed from the gas storage portion and the odorant. | 04-30-2009 |
20090317675 | FUEL CELL SYSTEM - It is an object of the present invention to provide a fuel cell system that is capable of sensing unintended gas leakage from a discharge control means based on odor. | 12-24-2009 |