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Fuel Cell Stack patents



      
           
This page is updated frequently with new Fuel Cell Stack-related patent applications. Subscribe to the Fuel Cell Stack RSS feed to automatically get the update: related Fuel RSS feeds. RSS updates for this page: Fuel Cell Stack RSS RSS


High efficiency fuel cell system with anode gas chemical recuperation and carbon capture

High efficiency fuel cell system with anode gas chemical recuperation and carbon capture

Rechargeable fuel cell

Rechargeable fuel cell

Rechargeable fuel cell

Material fuel cell separator, fuel cell separator using same, fuel cell stack, and method of producing fuel cell…

Date/App# patent app List of recent Fuel Cell Stack-related patents
10/09/14
20140302415
 Apparatus and method for heating a fuel cell stack patent thumbnailApparatus and method for heating a fuel cell stack
An apparatus for heating a fuel cell stack in a cold start mode is provided. The apparatus comprises a fuel cell stack, a power converter, and a controller.
10/09/14
20140302410
 High efficiency fuel cell system with anode gas chemical recuperation and carbon capture patent thumbnailHigh efficiency fuel cell system with anode gas chemical recuperation and carbon capture
A method of providing anode gas exhaust (38, 39) from a fuel cell stack (36) and carbon dioxide (54) capture by feeding reformed fuel and air into a fuel cell stack (36) where gas exhaust (38, 39) is fed to a series of oxidation/reduction beds (44, 46) to provide exit streams a) of h2o and co2 (41′) which is fed to a condenser (52) to recover co2 (54), and b) h2o and co (48) which is recirculated to the fuel cell stack (36).. .
10/02/14
20140295327
 Rechargeable fuel cell patent thumbnailRechargeable fuel cell
A device and method of forming a power generator includes a container, a fuel cell stack within the container, a metal hydride hydrogen producing fuel within the container, wherein the fuel cell stack is sandwiched between the container and an anode support surrounding the fuel and in close thermal contact with the fuel. The fuel cell stack has a cathode electrode for exposure to oxygen and an anode electrode for exposure to hydrogen.
10/02/14
20140295322
 Material fuel cell separator, fuel cell separator using same, fuel cell stack, and method of producing fuel cell separator material patent thumbnailMaterial fuel cell separator, fuel cell separator using same, fuel cell stack, and method of producing fuel cell separator material
A material for fuel cell separator, wherein a surface layer 6 containing au and cr is formed on a surface of a ti base 2, and an intermediate layer 2a containing ti, o, cr, and less than 20 atomic % of au is present between the ti base and the surface layer, a thickness of an area containing 65 atomic % or more of au being 1.5 nm or more, a maximum concentration of au being 80 atomic % or more, a coating amount of au being 9000 to 40000 ng/cm2, a ratio represented by (au coating amount)/(cr coating amount) being 10 or more, a coating amount of cr being 200 ng/cm2 or more, and in the intermediate layer having an area containing 10% or more of ti, 10% or more of o and 20% or more of cr being 1 nm or more.. .
10/02/14
20140295313
 Sanbornite-based glass-ceramic seal for high-temperature applications patent thumbnailSanbornite-based glass-ceramic seal for high-temperature applications
A glass-ceramic seal for ionic transport devices such as solid oxide fuel cell stacks or oxygen transport membrane applications. Preferred embodiments of the present invention comprise glass-ceramic sealant material based on a barium-aluminum-silica system, which exhibits a high enough coefficient of thermal expansion to closely match the overall cte of a sofc cell/stack (preferably from about 11 to 12.8 ppm/° c.), good sintering behavior, and a very low residual glass phase (which contributes to the stability of the seal)..
10/02/14
20140295312
 Systems and methods for configuring a fuel cell having lower coolant path isolation resistance patent thumbnailSystems and methods for configuring a fuel cell having lower coolant path isolation resistance
System and methods relating to a configuration for a fuel cell system having lower coolant path isolation resistances are disclosed. In certain embodiments, the fuel cell system may include a first fuel cell substack comprising a first plurality of cells.
10/02/14
20140295308
 Fuel cell stack patent thumbnailFuel cell stack
A fuel cell stack (1) includes a plurality of stacked power generation cells (3), a heat exchange unit (7) provided between adjacent two of the power generation cells, a fuel gas supply path arranged to supply the power generation cells with a fuel gas, and an oxidant gas supply path (3, 7, 33, 34, 38) arranged to supply the power generation cells with an oxidant gas, wherein the fuel gas supply path includes in series a first path (7, 31) passing through the heat exchange unit (7), a second path (3, 32, 35, 37) passing through some of the plurality of power generation cells (3) in parallel, and a third path (3, 32, 36) passing through the other power generation cells in parallel.. .
10/02/14
20140295305
 Fuel cell vehicle and moving body patent thumbnailFuel cell vehicle and moving body
A data signal accurately reflecting the actual state of a storage vessel is sent to a station side. A fuel cell system (1) includes a hydrogen supply line (32) that connects a tank main body (311) and a fuel cell stack (2), and a main stop valve provided to the hydrogen supply line (32).
10/02/14
20140292084
 Method of controlling the operation of a hybrid system patent thumbnailMethod of controlling the operation of a hybrid system
A method of controlling operation of a hybrid continuous current supply, the current supply including a fuel cell stack, a battery, and a dc/dc converter including an input and an output, the converter input being connected to the fuel cell stack output and the output being connected to a variable load in parallel with the battery, the fuel cell stack being formed of a plurality of electrochemical cells configured to produce electricity from a fuel and an oxidizing gas.. .
09/18/14
20140272662
 Cell retention design and process patent thumbnailCell retention design and process
A system and method for reducing the relative movement between adjacent fuel cells within a fuel cell stack includes an improved strategy for distributing an acceleration load over a fuel cell stack while maintaining stack performance after exposure to high acceleration loads. The system comprises a fuel cell stack comprising a plurality of fuel cells enclosed by a housing.
09/18/14
20140272661
Sealing design for stamped plate fuel cells
A fuel cell stack of at least two fuel cells, each fuel cell having a unitized electrode assembly (uea) including a membrane electrode assembly (mea), a sub-gasket and gas diffusion media (dm), and positioned between modified stamped field-flow plates. The sub-gasket frames the mea resulting in an overlap area between the mea and the inner perimeter of the sub-gasket.
09/18/14
20140272657
Apparatus and method for fuel cell standby
An apparatus for placing a fuel cell stack in a standby mode is provided. The apparatus comprises a compressor, a fuel cell stack, a cathode valve and a controller.
09/18/14
20140272655
Pem fuel cell stack
A fuel cell includes a cathode flow field plate, an anode flow field plate, and a membrane electrode assembly (mea) sandwiched between the cathode and anode flow field plate. The cathode flow field plate has a flat side and an opposed channel side that the mea is sandwiched between the anode flow field plate and the flat side of the cathode flow field plate.
09/18/14
20140272654
Remedial actions for air flow errors in a fuel cell system
A system and method for operating a fuel cell stack of a fuel cell system in a vehicle when an error in cathode air flow rate is detected. The system and method include estimating a cathode air flow rate and detecting an error in the estimated cathode air flow rate.
09/18/14
20140272652
Systems and methods for predicting polarization curves in a fuel cell system
The present disclosure relates to systems and methods that may be used to predict a performance metric of a fuel cell. A system consistent with the present disclosure may include sensors in communication with the fuel cell stack, a performance metric prediction system, and a control system.
09/18/14
20140272649
Apparatus and method for heating a fuel cell stack
An apparatus for heating a fuel cell stack in a cold start mode is provided. The apparatus comprises a fuel cell stack, a boost converter, and a controller.
09/18/14
20140272646
Fuel cell system and method to prevent water-induced damage
In one or more embodiments, a fuel cell system includes a fuel cell stack including an anode and a cathode, a first conduit positioned to supply oxygen to the cathode, a second conduit positioned to supply hydrogen to the anode, and a third conduit positioned separate from the first and second conduits and to supply oxygen to the second conduit. The third conduit may be positioned to supply oxygen from the first conduit to the second conduit..
09/18/14
20140272644
Fcs overall efficiency by using stored cathode oxygen during down-transients
A system and method for utilizing a pressurized volume of oxygen in a cathode plumbing of a fuel cell system. The system and method includes calculating an air/oxygen balance that is based on an air balance and an oxygen balance in the cathode plumbing.
09/18/14
20140272634
Integrated power generation and chemical production using fuel cells
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner.
09/18/14
20140272631
Centrifugal water separator for a fuel cell system
A separator for a fuel cell includes first and second ends connected by a side wall to define a separation chamber. The first end has a protrusion extending into the chamber to form a channel with the wall.
09/18/14
20140272630
Cathode humidification unit adapting degredation factor
A method and an apparatus to adapt the performance of a cathode humidification unit as a membrane in a fuel cell stack degrades over time. An algorithm compares a sensed humidity profile of the fuel cell stack and model humidity profile of a cathode humidification unit model to calculate a new degradation factor.
09/18/14
20140272625
Integrated operation of molten carbonate fuel cells
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner.
09/18/14
20140272612
Fuel cell mechanical components
A modular fuel cell system includes a metal base, a plurality of power modules arranged in a row on the base, a fuel processing module and a power conditioning module arranged on at least one end of the row on the base. Each of the plurality of power modules includes a separate cabinet comprising at least one fuel cell stack located in a hot box.
09/18/14
20140260311
Integration of molten carbonate fuel cells with fermentation processes
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner.
09/11/14
20140255818
Hemmed fuel cell stack enclosure
A fuel cell system is provided which includes a compression retention enclosure with upper and lower compression shells and side sheet components coupled by interlocking hem joints. Methods for manufacturing compression retention enclosures with hem joints such that the enclosure remains sealed upon operational swelling of the fuel stack are also provided.
09/11/14
20140255810
Fuel cell power control by offset estimation
A system and method for managing power flow in a fuel cell vehicle. The method provides a difference between a power limit signal and an actual power signal to a pi controller to generate a power offset signal.
09/04/14
20140247053
Method of utilizing power transistor of fuel cell stack diagnostic system
A method and an apparatus using a power transistor in a fuel cell stack diagnostic system provides an apparatus using a power transistor in a fuel cell stack diagnostic system. The apparatus includes a regenerative braking detector that detects regenerative braking of a fuel cell vehicle equipped with a fuel cell stack diagnostic system; a voltage rise determiner that determines whether a voltage rise due to regenerative braking of a fuel cell vehicle is a predetermined value or more; and a power transistor controller that controls an ac signal generator so that the voltage due to the regenerative braking is discharged by the power transistor, when the voltage rise due to regenerative braking determined by the voltage rise determiner is a predetermined value or more..
08/28/14
20140242492
Fuel cell stack compression devices and methods
A spring compression assembly is configured to apply a load to a stack of electrochemical cells. The assembly includes a ceramic leaf spring, a tensioner configured to apply pressure to a first side of the spring and a bottom plate located on a second side of the spring opposite the first side of the spring.
08/28/14
20140242486
Apparatus and method for generating virtual sound source for monitoring the operating state of a fuel cell stack
The present invention provides an apparatus and method for generating a virtual sound source for monitoring the operating state of a fuel cell stack, which monitors in real time the deviation and deterioration of a plurality of cells in a fuel cell stack during operation, and expresses the results as a chord or different sounds, thus allowing a driver to easily recognize the operating state of the fuel cell stack. .
08/28/14
20140242483
Solid oxide fuel cell system
A solid oxide fuel cell system (10) comprises a solid oxide fuel cell stack (12) and a gas turbine engine (14). The solid oxide fuel cell stack (12) comprises a plurality of solid oxide fuel cells (16).
08/21/14
20140234747
Fuel cell stack
A fuel cell stack includes a stacked body which includes separators and a membrane electrode assembly. A first terminal plate, a first insulator, and a first end plate are disposed at a first end of the stacked body.
08/21/14
20140234746
Fuel cell stack
A fuel cell stack includes a stacked body, a first terminal plate, a first insulator, a first end plate, a second terminal plate, a second insulator, a second end plate, a fluid manifold, a fluid channel, a fluid hole, a first connection passage, and a second connection passage. The stacked body includes a plurality of separators and a membrane electrode assembly.
08/21/14
20140234743
Fuel cell stack
A fuel cell stack is formed by stacking a plurality of fuel cells in a stacking direction, and at both ends in the stacking direction of the fuel cells, a first end plate and a second plate are provided. An oxygen-containing gas supply connection pipe connected to an oxygen-containing gas supply passage is attached to the first end plate.
08/21/14
20140234742
Fuel cell stack
A fuel cell stack includes a plurality of power generation units, a reactant gas channel, and a coolant channel. The plurality of power generation units are stacked in a stacking direction to provide a stacked body and each includes a first separator, a first electrolyte electrode assembly, a second separator, a second electrolyte electrode assembly, and a third separator.
08/21/14
20140234736
Solid oxide fuel cell device
The present invention is a solid oxide fuel cell device with a load following function for changing a fuel supply rate in response to a load defined as a required power determined by demand power. The solid oxide fuel cell device comprises a fuel cell module having a fuel cell stack composed of a plurality of solid oxide fuel cells and a reformer for reforming fuel and supplying the fuel to the fuel cells; an inverter for receiving electrical power generated by the fuel cell module and converting the power to alternating power; a command power value setting device for setting a command power value to be generated by the fuel cell module based on the amount of load; a fuel control device for determining an fuel supply rate and supplying the fuel by the fuel supply rate to the fuel cells so as to generate the command power value; an inverter permitted power value instruction device for instructing to the inverter an inverter permitted power value corresponding to the command power value, which is the permitted amount of power to be extracted from the fuel cell module, after the fuel has been supplied by the fuel supply rate to the fuel cells by the fuel control device; and an inverter permitted power value change device for changing an amount of change per unit time in a next inverter permitted power value based on a temperature inside the fuel cell module and outputting the amount of change per unit time to the inverter permitted power value instruction device; wherein the inverter permitted power value change device changes the amount of change per unit time in the inverter permitted power value to be larger, the higher the temperature is, in a temperature region equal to or lower than a first predetermined temperature, and to be smaller, the higher the temperature is, in a temperature region equal to or higher than a second predetermined temperature..
08/14/14
20140227625
Cell voltage monitoring connector system for a fuel cell stack
An electrical connection system for cell voltage monitoring in a fuel cell stack. The fuel cell stack comprises a plurality of layers and a plurality of electrically conductive connection tabs extending outwardly from at least one face of the stack.
08/14/14
20140227621
Fuel cell stack and fuel cell system
A fuel cell stack formed by stacking two or more fuel cell layers each constituted of one or more unit cell and a fuel cell system including the same are provided. Any two fuel cell layers adjacent to each other each have one or more gap region.
08/14/14
20140224562
Fuel cell vehicle
An object of the present invention is to efficiently mount a fuel cell system below a floor of a vehicle rear portion and to protect the fuel cell system when a forward impact force acts on a vehicle rear portion. To achieve this, a fuel cell vehicle in which a fuel cell system includes a gas tank is configured to store a fuel gas and a fuel cell unit formed by integrating a fuel cell stack, an intake duct, and an exhaust duct, the gas tank is disposed in a space below a rear floor connected to a front floor via a vertical wall portion and adjacent to the vertical wall portion, and the fuel cell unit is disposed behind the gas tank.
08/07/14
20140220471
Fuel cell having a modular base active area
A fuel cell stack includes a plurality of fuel cells arranged in a stack configuration extending along a z-axis, wherein each fuel cell includes a membrane electrode assembly interposed between a pair of bipolar plates, and each membrane electrode assembly has a total active area measured in an x-y plane that is generally perpendicular to the z-axis. Each bipolar plate includes a plurality of common passages extending generally parallel to the z-axis.
08/07/14
20140220464
Fuel cell module
A fuel cell module includes a fuel cell stack, a partial oxidation reformer, and a heat exchanger. The heat exchanger is provided on one side of the fuel cell stack, and the partial oxidation reformer and the exhaust gas combustor are provided on the other side of the fuel cell stack.
08/07/14
20140216036
Solid oxide fuel cell system
A solid oxide fuel cell system (10) comprises a solid oxide fuel cell stack (12) and a gas turbine engine (14). The solid oxide fuel cell stack (12) comprises a plurality of solid oxide fuel cells (16).
07/31/14
20140212785
Fuel cell stack
A fuel cell stack includes a stacked body, insulators, end plates, heat insulating members, and terminal plates. In the stacked body, a plurality of power generation cells are stacked in a stacking direction.
07/31/14
20140212783
Fuel cell stack with thin endplate with integrated gas distribution tubes
A fuel cell stack comprises a thin process-gas-connection-endplate with a temperature expansion coefficient which is substantially the same as the temperature expansion coefficient of the plurality of fuel cells and interconnects forming the fuel cell stack, the length and width of the thin process-gas-connection-endplate is matching the length and width of the fuel cells and interconnects and the process-gas-connection-endplate is sealed to the stack of cells and interconnects so the process-gas-connection-endplate, cells and interconnects form one integrated unit, wherein process gas distribution tubes are fixed connected, e.g. Welded or brazed to the process-gas-connection-endplate..
07/31/14
20140212776
Varying wall geometry ejector
An apparatus for delivering a primary fuel stream to a fuel cell stack is provided. The apparatus includes an ejector that is configured to receive the primary fuel stream from a fuel supply.
07/31/14
20140212704
Manifold for fuel cells
A manifold for use with fuel cell and fuel cell stacks is provided. In certain examples, the manifold may be constructed and arranged to provide air to all cathodes in a first fuel cell stack fluidically coupled to the manifold and configured to provide fuel to all anodes in the first fuel cell stack.
07/24/14
20140205926
Fuel cell system and starting method thereof
The problem is that a large force is required to open a flow-dividing shut valve provided in an air supply path for supplying the air to a fuel cell stack at a start of a fuel cell system. This problem is solved by reducing a pressure difference between upstream and downstream of the flow-dividing shut valve, before the flow-dividing shut valve is opened, at a start of the fuel cell system..
07/24/14
20140205924
Selectively reacting to the minimum cell voltage drop rate in a fuel cell system
A system and method that monitor the rate of a voltage drop of fuel cells in a fuel cell stack to determine whether the voltage drop is a result of cathode reactant starvation or anode reactant starvation. The method looks at a falling voltage of a fuel cell to determine whether the rate of the fall in voltage indicates that hydrogen starvation of the anode of the fuel cell is occurring.
07/24/14
20140205866
Fuel cell module
A fuel cell module includes a fuel cell stack, a reformer for reforming a mixed gas of a raw fuel and water vapor, an evaporator for supplying water vapor to the reformer, and a heat exchanger for raising the temperature of the oxygen-containing gas by heat exchange with a combustion gas, and an exhaust gas combustor and a start-up combustor for producing the combustion gas. The fuel cell module includes a first thermoelectric converter and a second thermoelectric converter for performing thermoelectric conversion based on a temperature difference between the combustion gas and the oxygen-containing gas..
07/17/14
20140199605
Transient inlet relative humidity estimation via adaptive cathode humidification unit model and high frequency resistance
An apparatus and method to determine the relative humidity of a fuel cell system. A controller is cooperative with a first device and a second device to receive a valve signal and a high frequency resistance value.
07/10/14
20140195031
Serialization of fuel cell components
Systems and methods for fuel cell stack part serialization and tracking. In an embodiment, a barcode may be applied to a fuel cell stack part which may identify the fuel cell stack part.
07/10/14
20140193737
Membrane-electrode assembly, fuel cell stack, fuel cell system and operation method thereof
A membrane-electrode assembly includes: a polymer electrolyte membrane; catalyst layers disposed on the polymer electrolyte membrane; and gas diffusion layers respectively disposed on the catalyst layers. Each of the gas diffusion layers is constituted by a porous member containing electrically-conductive particles and polymer resin as major components, and a ratio (y/x) of a tensile strength y (n/cm) of the gas diffusion layer to a dry-wet size change rate x (%) of the polymer electrolyte membrane is 0.10 or higher..
07/10/14
20140193287
Method of producing a shaped part
A shaped part that is particularly suited as an interconnector or an end plate for a fuel cell stack, is produced by pressing and sintering a pulverulent starting material. The shaped part has a basic body with a multiplicity of knob-like and/or ridge-like elevations with a height h.
07/03/14
20140188414
Method and system for measuring impedance for diagnosis of fuel cell stack
A method and system for measuring impedance of a fuel cell stack that can rapidly measure impedance of a plurality of frequencies of the fuel cell stack using a sine wave signal in which a different plurality of frequencies are synthesized as an impedance measurement input signal, for diagnosis of the state of a fuel cell stack includes: synthesizing a plurality of sine wave signals having different frequencies; applying the synthesized signal as an input signal for measuring to the fuel cell stack; measuring a current and a voltage of the fuel cell stack; transforming the measured current and voltage of the fuel cell stack with a predetermined method; and calculating impedance of the fuel cell stack of the different frequencies based on the current and voltage of the fuel cell stack that is transformed with the predetermined method.. .
07/03/14
20140186746
Apparatus for insulating exposed charging part of fuel cell stack
An apparatus for insulating a plurality of exposed live parts of a fuel cell stack, includes a plurality of protectors. Each of the plurality of protectors is made of an insulating material and configured to insulate a corresponding one of the plurality of exposed live parts to which a corresponding one of current collector terminals disposed in an end plate of the fuel cell stack and a corresponding one of connections of a busbar are connected..
07/03/14
20140186740
Fuel cell stack
A fuel cell stack which can achieve a high output voltage even with a reduced number of staked cells using a separator in which two or more reaction areas are connected in an insulated manner. In detail, a fuel cell stack, which employs a separator with a structure in which two or more reaction areas are connected in an insulated manner by means of an insulating material to increase the voltage generated in the fuel cell stack and maintain the current at a low level, in which a gas diffusion layer, a membrane electrode assembly, etc.
07/03/14
20140186738
Fuel cell stack for preventing deterioration of end cell
A fuel cell stack preventing deterioration of an end cell, which has a structure for preventing cooling of a neighbor cell adjacent to a closed end plate, is provided. To this end, an open end plate and a closed end plate, which are provided on a first side and a second side, respectively, of the fuel cell stack, fasten a plurality of working cells together.
07/03/14
20140186734
Diagnostic and heat management system for fuel cell stack
A diagnostic and heat management system for a fuel cell stack is provided herein that includes a diagnostic control analyzer that diagnoses and analyzes a state of the fuel cell stack by measuring a voltage and a current of the fuel cell stack. Also, an ac signal generator generates a diagnostic ac signal, and an ac component driving element that is included in an ac component in a current of the fuel cell stack.
07/03/14
20140186727
Humidification apparatus for fuel cell system
A humidification apparatus for a fuel cell system is provided herein. A membrane humidifier includes humid air inlets, through which humid air discharged from a cathode of a fuel cell stack is introduced, and air outlets, through which air humidifying dry air in hollow fiber membranes is discharged, an air line connected from a cathode outlet of the fuel cell stack to the humid air inlets of the membrane humidifier to supply humid air.
07/03/14
20140186726
Method to diagnose fuel cell humidification problems
A system and method for determining if an rh sensor that measures the relative humidity of cathode inlet air provided to a fuel cell stack or an hfr circuit that measures stack water content is operating properly. The method provides the cathode inlet air through a wvt unit that increases the water content of the cathode inlet air.
07/03/14
20140186725
Fuel cell system and method of purging the same
A fuel cell system and a method of purging the same are provided. The fuel cell system includes: a fuel cell stack that includes a fuel electrode and an air electrode as well as an air supply unit that supplies air of a blower to the air electrode via a humidifier through an air supply line.
07/03/14
20140184264
Diagnostic system and method for fuel cell stack
A diagnostic system and method for a fuel cell stack that diagnoses the state and/or failure of the fuel cell stack. More specifically, the diagnostic control analyzer diagnoses and analyzes the state of the fuel cell stack by measuring the voltage and the current received from the fuel cell stack.
06/26/14
20140178784
Active thermal management system for fuel cell stack
An active thermal management system for a fuel cell stack controls the distribution of coolant flow for each unit cell of the fuel cell stack based on the temperature distribution measured at unit cells of the fuel cell stack. A coolant distribution means is capable of controlling the distribution of coolant flow for different sets of unit cells.
06/26/14
20140176145
Method and apparatus for diagnosing fault of fuel cell stack based on measurement of stack current
Provided is an apparatus and method for diagnosing a fault of a fuel cell stack based on measurement of a stack current. The apparatus includes an alternating-current (ac) generation circuit configured to apply an ac to a fuel cell stack driven by a basic operating current (direct-current: dc), a current measurement circuit configured to measure a current of the fuel cell stack caused by the dc applied to the fuel cell stack, and a micom configured to diagnose a fault of the fuel cell stack on the basis of a current measurement result of the current measurement circuit..
06/26/14
20140176144
Method for diagnosing fault of fuel cell stack
Disclosed herein is a method for diagnosing a fault of a fuel cell stack, including: applying a summed current obtained by summing currents of different frequency regions to the fuel cell stack; passing output voltages of the fuel cell stack through each of the different frequency filters to extract the respective diagnosis data; and diagnosing whether or not a fault has been generated in the fuel cell stack using the respective diagnosis data. Therefore, it is possible to further improve diagnosis analysis capability by applying the summed current obtained by summing the currents of the different frequency regions to the fuel cell stack and then rapidly diagnosing the fault of the fuel cell stack using the diagnosis data obtained by filtering the output voltages of the fuel cell stack..
06/26/14
20140176143
Method for generating injected current of fuel cell stack
Disclosed herein is a method for generating an injected current of fuel cell stack, including: generating a synthesized frequency current in a form in which a first frequency current is synthesized with a second frequency current; and applying the synthesized frequency current to the fuel cell stack, wherein the first frequency current and the second frequency current are each used to calculate at least one of total harmonic distortion and impedance. According to the embodiment of the present invention, a hardware configuration may be reduced by applying the synthesized frequency current of the ac current for calculating the total harmonic distortion (thd) and the ac current for calculating the impedance to the fuel cell stack, without generating the ac current for calculating the total harmonic distortion (thd) and the ac current for calculating the impedance, respectively, thereby reducing a price and a size of the fuel cell stack..
06/26/14
20140176142
Method for diagnosing fault of fuel cell stack
Disclosed herein is a method for diagnosing a fault of a fuel cell stack, the method including: applying a summed current obtained by summing first and second frequencies to the fuel cell stack; diagnosing whether or not a fault has been generated in the fuel cell stack using a higher frequency of first and second frequencies of output voltages of the fuel cell stack; and reconfirming whether or not the fault has been generated in the fuel cell stack using the first and second frequencies in the output voltage of the fuel cell stack.. .
06/26/14
20140175890
Method for generating injected current of fuel cell stack and apparatus performing the same
Disclosed herein is a method for generating an injected current of a fuel cell stack performed in an apparatus for generating an injected current of a fuel cell stack, the method including: extracting a first frequency current and a second frequency current by passing alternating currents of different frequencies through a plurality of filters, respectively; generating a summed frequency current by summing the first frequency current and the second frequency current; and applying the summed frequency current to the fuel cell stack. Therefore, it is possible to operate the fuel cell stack by applying the summed current obtained by summing the alternating current for calculating the total harmonic distortion (thd) and the alternating current for calculating the impedance to the fuel cell stack..
06/19/14
20140170522
Fuel cell and fuel cell stack
A fuel cell includes a pair of interconnectors (ics); a cell main body provided between the ics and including an electrolyte, a cathode and an anode formed on respective surfaces of the electrolyte; and a current collection member provided between at least one of the cathode and the anode and the ic for electrically connecting the cathode and/or the anode and the ic. The current collection member has a connector abutment portion which abuts the ic, a cell main body abutment portion abutting the cell main body, and a connection portion connecting the connector abutment portion and the cell main body abutment portion, the portions being continuously formed.
06/19/14
20140170521
Fuel cell stack
A fuel cell stack is provided that includes unit cells that include a manifold, an open end plate that is disposed at one side of the unit cells and that has a reaction gas inlet and outlet that are connected to the manifold, and a closed end plate that is disposed at the other side of the unit cells and that closes the manifold, in particular, the open end plate includes a first slanted surface that adjusts a flow of a reaction gas at a reaction gas inlet and a manifold interface. A first alignment protrusion forms the first slanted surface and that aligns the unit cells, and the closed end plate includes a second slanted surface that adjusts flow of a reaction gas at the manifold interface.
06/19/14
20140170520
Design for manufacturing/assembly of a fuel distributor assembly
A fuel distributor assembly for a fuel cell stack that includes an inner shell positioned within an outer shell. The outer shell is curved to define a central longitudinal chamber, a first longitudinal edge and a second longitudinal edge.
06/19/14
20140170516
Increasing thermal dissipation of fuel cell stacks under partial electrical load
A method of operating a high temperature fuel cell system containing a plurality of fuel cell stacks includes operating one or more of the plurality of fuel cell stacks at a first output power while operating another one or more of the plurality of the fuel cell stacks at a second output power different from the first output power.. .
06/19/14
20140170512
Method for mitigating recoverable voltage loss through humidification control
A system and method for recovering fuel cell stack voltage loss through humidification control. The method includes determining a rate of contamination addition to a surface of a fuel cell electrode in the fuel cell stack and determining a rate of contamination removal from the surface of the fuel cell electrode.
06/19/14
20140170510
System and method for recovering performance of fuel cell
A method for recovering performance of a degraded polymer electrolyte fuel cell stack through electrode reversal. In detail, oxide films formed on the surface of platinum of a cathode is removed through an electrode reversal process that creates a potential difference between an anode and the cathode by supplying air to the anode instead of hydrogen and supplying a fuel to the cathode instead of air, thus rapidly recovering the performance of a degraded polymer electrolyte fuel cell stack..
06/19/14
20140170386
Slip sheet for fuel cell stack
A slip sheet for a fuel cell stack that includes a plurality of spaced fluid channel support protrusions protruding from a main body, at portions which face fluid channel protrusions of a separator plate in such a manner that the spaced fluid channel support protrusions come into contact with the fluid channel protrusions of the separator plate.. .


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Fuel Cell Stack topics: Fuel Cell Stack, Fuel Cell System, Heat Exchanger, Electrolyte, Internal Combustion Engine, Condensation, Evaporative Heat Exchanger, Combustion, Evaporation

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