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| Number | Title | Issue Date |
| 8067122 | Fuel cell system A fuel cell system is provided, the system comprising: a fuel cell (1) configured to generate electric power by use of a fuel gas; a reformer (2) configured to generate the fuel gas by reforming a raw material; a combustion burner (2a) co... | 11/29/2011 |
| 7745028 | Fuel cell system A fuel cell system comprising a fuel tank, a stack generating electrical energy using fuel and an oxidizer supplied thereto, and a pressure reducing unit supplying the fuel from a fuel tank to the stack while maintaining the pressure of the stack lower than the atmo... | 06/29/2010 |
| 7695839 | Method for improved power up-transient response in the fuel cell system A fuel cell system that employs a method for increasing stack power ramp up for high power up-transients by decoupling the build-up of stack current density from the cathode side pressure. The system gives the compressor power priority during the power up-transient ... | 04/13/2010 |
| 7691510 | Fuel cell system with differential pressure control A fuel cell system includes a fuel cell that is subjected to a purge operation of supplying an inert gas to an anode and/or cathode upon shut-down of the fuel cell. The differential pressure ΔP is defined as ΔP=Pa−Pc where Pa is the pressure in an inlet-side flo... | 04/06/2010 |
| 7687171 | Multi-stage in-line cartridge ejector for fuel cell system Multi-stage in-line cartridge ejectors for a fuel cell system provided herein comprise: at least one ejector main body for supplying hydrogen, each ejector main body including a plurality of nozzles arranged in line with a predetermined gap, in which the diameters o... | 03/30/2010 |
| 7687170 | Fuel cell system A fuel cell system in which fuel cell flooding is eliminated by providing necessary flow speed of fuel gas within a channel while improving system efficiency of the fuel cell by re-circulating unreacted fuel gas, which has been discharged externally from a circulati... | 03/30/2010 |
| 7687169 | Stop method for fuel cell system A stop method for a fuel cell system that includes a fuel cell unit in which hydrogen is supplied to an anode, and air is supplied to a cathode so as to generate electrical power via an electrochemical reaction. The stop method includes the steps of stopping supply ... | 03/30/2010 |
| 7682721 | Fuel cell system A fuel cell system and a related operating method are disclosed. The system includes a fuel cell body 1 having an anode electrode supplied with fuel gas containing hydrogen and a cathode electrode supplied with oxidizer gas, a catalyst degradation-suppressing... | 03/23/2010 |
| 7678482 | Forced air fuel cell power system A portable electricity generation device comprises a plurality of fuel cells, each fuel cell having an anode end with a catalyst facilitating the separation of hydrogen atoms into electrons and protons, a cathode end facilitating the combination of the electrons and... | 03/16/2010 |
| 7678481 | Fuel cell system with a fuel tank configured to store a fuel at a pressure higher than atmospheric pressure A fuel cell system includes a fuel tank configured to store a fuel at a pressure higher than atmospheric pressure; a vaporizer configured to vaporize the fuel; a reformer configured to reform the vaporized fuel into a hydrogen rich gas; a CO gas removal apparatus co... | 03/16/2010 |
| 7666535 | Fuel cell system and method of operating a fuel cell system A fuel cell system includes a control device for setting an oxygen-containing gas operating pressure target value on the cathode side using a relative pressure relative to atmospheric pressure, setting a fuel gas operating pressure target value on the anode side usi... | 02/23/2010 |
| 7662495 | Passive restriction pathways in fuel cell water drainage A passive restriction passageway (for example, a passive capillary valve or a restricting orifice) positioned to drain accumulated liquid from a fuel cell reactant flow channel is used in conjunction with a control element for periodically adjusting the pressure acr... | 02/16/2010 |
| 7648787 | Gas leak detection device and fuel cell system In a fuel cell system (100), the amount of fuel gas supplied through an fuel gas supply passage (24) and the amount of fuel gas consumed by a fuel cell (10) are detected. A difference between the amount of supplied fuel gas and the amount of con... | 01/19/2010 |
| 7638218 | Operation control of fuel cell system In a fuel cell system of the invention, a pressure regulator is provided in the pathway of a hydrogen supply conduit that connects a hydrogen tank to a fuel cell stack. An anode off gas discharged from the fuel cell stack is recirculated through a recirculation pipe... | 12/29/2009 |
| 7618730 | Fuel cell system and method for regulating pressure in fuel cell systems This invention relates to a fuel cell system with a polyelectrolyte membrane fuel cell and a method by which the pressure inside the fuel cell can be regulated by means of the quantity of fuel introduced. This regulation is accomplished by means of pressure sensors ... | 11/17/2009 |
| 7615296 | Fuel cell system A fuel cell system includes a fuel cell configured to generate power by consuming a fuel gas and having an outlet port through which the fuel gas flows out; a moisture removal unit configured to remove moisture contained in the fuel gas that has been sent through th... | 11/10/2009 |
| 7608354 | Fuel cell system and control method of same A gas/liquid separation device is connected to a discharge valve which can discharge fuel gas to the outside of a fuel cell system along with water accumulated in the gas/liquid separation device. A change in pressure at a portion upstream of the discharge valve, wh... | 10/27/2009 |
| 7597977 | Diagnostic method for fuel cell In a diagnostic method for a fuel cell, the amount of cross leak is determined by supplying the anode of the fuel cell with a hydrogen or hydrogen-containing gas, and supplying the cathode with an inert gas or vacuuming the cathode, and measuring the voltage of each... | 10/06/2009 |
| 7582372 | Pressure regulator for fuel cell When a stepping motor is de-energized, a valve shaft is turned in a direction to open a valve body under the resilient forces stored in a fully opening spring through a receptacle and a driven plate. At this time, a drive plate is turned in unison with the driven pl... | 09/01/2009 |
| 7563530 | Fuel amount control system for fuel cell A fuel amount control system of a fuel cell includes a fuel storage unit that stores the fuel to be supplied to the anode, a diluent storage unit that stores a diluent generated as a result of the chemical reaction in the cathode, a fuel mixing unit that mixes the f... | 07/21/2009 |
| 7514169 | Fuel cell system A fuel cell system has: a water supply cycle for supplying water to a fuel cell stack through piping; n numbers of pressure detection devices (n is an even number of two or greater) provided on the piping and detecting pressure of the water; and a control device for... | 04/07/2009 |
| 7476458 | Fuel cell system A water trap having a discharge valve is disposed in a gas flow passage of a fuel cell system. It is judged whether or not water is accumulated inside the water trap based on pressure variation inside the gas flow passage when the discharge valve is kept open. ... | 01/13/2009 |
| 7470481 | Fuel cell system A fuel cell system includes at least one fuel cell stack having a fuel chamber including a fuel electrode (anode), an air chamber including an oxygen electrode (cathode), an electrolyte layer interposed between the fuel electrode and the oxygen electrode, and a pres... | 12/30/2008 |
| 7465510 | Turbocompressor impelling fuel recycle in fuel cell power plant A fuel cell power plant (7, 7a) has a stack (8) fed hydrogen-rich fuel gas from a source (14, 14a) with fuel recycle (30, 34) through a compressor (20) of a turbocompressor (19) having a turbine (17, 17 | 12/16/2008 |
| 7445861 | Method for detecting abnormality in fuel cell The invention detects quickly and with high precision abnormalities in fuel cells. In a method of detecting abnormalities in a fuel cell 1 comprising a plurality of unit cells that generate power by supplying hydrogen gas to an anode and supplying air to a ca... | 11/04/2008 |
| 7442458 | Fuel cell system and activation system thereof A fuel cell system is equipped with a fuel cell for generating power by an electrochemical reaction of a fuel gas and an oxidizer gas, a fuel gas supply mechanism for supplying the fuel gas to the fuel cell, a supply amount adjustment mechanism for adjusting a suppl... | 10/28/2008 |
| 7442452 | Fuel cell system and gas leak detection method When a command for stopping electric generation by a fuel cell is issued, shutoff valves are closed (at time t1), and then a time-dependent change in pressure (P) in a closed passage area including the fuel cell is detected. A pressure change speed (dP1 | 10/28/2008 |
| 7442455 | Apparatus and method for protecting fuel cell A memory unit stores maps of predetermined determination threshold values for detection values detected by a hydrogen sensor according to an operating state of a fuel cell such as a difference in pressure between reaction gases at an anode and a cathode, supply pres... | 10/28/2008 |
| 7442457 | Fuel cell system with compressor and also a method for operating such a fuel cell system A fuel cell system comprising a plurality of fuel cells combined together to form a fuel cell stack, with the fuel cell stack having an anode side with an inlet for a fuel and an outlet for non-consumed fuel and exhaust gases arising at the anode side as well as a c... | 10/28/2008 |
| 7442461 | Fuel processing system having gas recirculation for transient operations A fuel processor system capable of circulating fuel processor system gases, such as reformate, anode exhaust, and/or combustor exhaust, through the fuel processor to provide a number of distinct advantages. The fuel processor system having a plurality of fuel cells ... | 10/28/2008 |
| 7438986 | Fuel cell system with improved humidification system A method for operating a fuel cell power plant. The fuel cell can include a reactant passage (22) with an upstream portion and a downstream portion for providing reactant to an electrode (16, 18), at least one liquid passage (24), and a plate ( | 10/21/2008 |
| 7416800 | Method and apparatus for a combined fuel cell and hydrogen purification system Fuel cell systems and associated methods of operation are provided whereby application of a fuel cell is coordinated with a fuel processor and a hydrogen separator. One such method includes the following steps: (1) operating a fuel processor to convert a hydrocarbon... | 08/26/2008 |
| 7413823 | Method for monitoring the discharge of media out of fuel cell, and a fuel cell system A defective operation of a valve (15, 35, 37, 39) in a drainage line (13, 21, 31, 33) of a fuel cell results in unintentionally permitting process gas to flow into the surrounding area of the fuel cells. In order to resolve this problem, the invention ... | 08/19/2008 |
| 7413822 | Device and method to release the overpressure of a fuel cell coolant tank A device and method to convert residual hydrogen present in a fuel cell cooling system into water. An oxygen-bearing fluid is supplied to the cooling system from a source that also has elevated moisture levels to minimize the likelihood that the oxygen-bearing fluid... | 08/19/2008 |
| 7410710 | Firstout shutdown tracing for fuel processor control system A method and apparatus for determining which condition in a fuel processor has initiated a shutdown of the fuel processor are disclosed. In general, the apparatus generates a plurality of shutdown initiator signals, each corresponding to one of a plurality of shutdo... | 08/12/2008 |
| 7410714 | Unitized regenerative fuel cell system A Unitized Regenerative Fuel Cell system uses heat pipes to convey waste heat from the fuel cell stack to the reactant storage tanks. The storage tanks act as heat sinks/sources and as passive radiators of the waste heat from the fuel cell stack. During charge up, i... | 08/12/2008 |
| 7410711 | Fuel cell output characteristic estimation apparatus and output characteristic estimation method, fuel cell system and vehicle having the same, and fuel cell output control method and data storage medium An output characteristic of a fuel cell is estimated by detecting an output current of the fuel cell and a voltage between terminals of the fuel cell, and then estimating the output characteristic of the fuel cell on the basis of the detected output current and the ... | 08/12/2008 |
| 7405016 | Apparatus for supplying an oxygen-containing gas to a fuel cell system A fuel cell system (1) comprises at least one fuel cell (2) and at least one gas generation system (6) in which at least one component requires air during operation. A compression device (11) is provided to supply the oxygen-containing ga... | 07/29/2008 |
| 7402352 | Fuel cell system and related startup method A fuel cell system (FS) is provided with a fuel cell (1) having a fuel electrode (1c) and an oxidizer electrode (1a), disposed in opposition thereto, between which an electrolyte membrane (1b) is sandwiched, a fuel ga... | 07/22/2008 |
| 7399328 | Hydrogen gas station, fuel cell system, and hydrogen gas rate accounting device A hydrogen gas station is disclosed comprising, a reformer configured to generate a hydrogen-rich reformed gas through reforming reaction of an organic compound, a gas supply port configured to communicate with a gas supply pipe to supply the reformed gas to a plura... | 07/15/2008 |
