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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


Fuel cell power control by offset estimation

Method of utilizing power transistor of fuel cell stack diagnostic system

Fuel cell stack compression devices and methods

Date/App# patent app List of recent Fuel Cell Stack-related patents
09/11/14
20140255818
 Hemmed fuel cell stack enclosure patent thumbnailHemmed 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 patent thumbnailFuel 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 patent thumbnailMethod 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 patent thumbnailFuel 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 patent thumbnailApparatus 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 patent thumbnailSolid 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 patent thumbnailFuel 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 patent thumbnailFuel 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 patent thumbnailFuel 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 patent thumbnailFuel 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.. .
06/12/14
20140162171
Anode leak location detection
A system and method for quantifying an anode leak location in a fuel cell system. The system and method include determining there is a leak in an anode sub-system of a fuel cell stack and estimating a first effective leak area using a first leak flow value and first operating parameters.
06/12/14
20140162168
Fuel cell stack
A fuel cell stack is provided that includes: i) a plurality of unit cells that are stacked together; ii) end plates that are each disposed at outermost ends of the unit cells and that press the plurality of unit cells together; and iii) a plurality of tension bars that engage the end plates, wherein an tension bar corresponding to an outermost portion of the unit cells has a predetermined angle of slope and engages with the end plate.. .
06/12/14
20140162166
Fuel cell stack
In a fuel cell stack, knock pins extending in a stacking direction are provided between a first end plate and a second end plate for positioning a stack body. The first end plate and the second end plate have insertion holes for insertion of knock pins.
06/12/14
20140162165
Fuel cell stack including cooling plate for improving temperature distribution
A fuel cell stack includes a first separating plate, a second separating plate corresponding to the first separating plate, a plurality of cells comprising a membrane electrode assembly disposed between the first separating plate and the second separating plate, and a cooling plate disposed between the plurality of cells, where a cooling channel is defined at opposing surfaces of the cooling plate.. .
06/12/14
20140162164
Metal separator for fuel cell, fuel cell stack having the same and gasket assembly with fuel cell stack
A fuel cell stack is provided which includes a gasket assembly interposed between the membrane-electrode assembly and an edge portion of the metal separator. In particular, the metal separator is formed of a first metal plate and a second metal plate welded to each other, and one or more curved portions, which are symmetrical to each other, formed around a welded portion of the first and second metal plates.
06/12/14
20140162163
Fuel cell stack
A fuel cell stack includes a plurality of fuel cells each including a first separator, a second separator and a membrane electrode assembly. A first reactant gas manifold of the first separator has an elongated opening extending along a ridge line of a first buffer portion and has an end wall surface that is located at an end of the first reactant gas manifold of the first separator near a middle portion of the first buffer portion and that is a convex curved surface.
06/12/14
20140162162
Fuel cell system hot box insulation
A method of insulating a base portion of a fuel cell system including pouring an insulation that can be poured to fill at least 30 volume % of a base portion cavity of the fuel cell system housing through an opening in a sidewall of the housing. The base portion cavity of the housing is located between a bottom wall of the housing and a stack support base plate located in the housing.
06/12/14
20140162161
Connector system for a fuel cell stack
An electrical connection system for cell voltage monitoring in a fuel cell stack. A fuel cell stack assembly comprises a plurality of fuel cells disposed in a stacked configuration, each cell substantially parallel to an x-y plane and including an electrical tab extending laterally from an edge of a plate in the cell in the x-direction to form an array of tabs extending along a side face of the fuel cell stack in a z-direction orthogonal to the x-y plane.
06/12/14
20140162159
Method for running a fuel cell system with a failed stack health monitor
A system and method for selectively operating a fuel cell stack in response to loss of a voltage signal from one or more fuel cells in the stack. If the voltage signal from the one or more fuel cells is lost, the method performs one or more remedial actions to cause the fuel cell stack to operate in a more stack safe condition.
06/12/14
20140162158
Fuel cell bypass diode structures and attachment methods
A fuel cell system includes a fuel cell stack which includes a plurality of fuel cells contacted in series by a plurality of interconnects. The various embodiments provide systems and methods for coupling a fuel cell stack with an electric bypass module within a hot zone.
06/12/14
20140162157
Apparatus for diagnosing fault of fuel cell stack
A failure diagnosis apparatus that includes an alternating current (ac) absorption unit that is connected to the fuel cell stack and switched based on an applied ac signal to enable a current from the fuel cell stack to flow. In addition, an ac signal generator is configured to generate the ac signal and supply the generated ac signal to the ac absorption unit.
06/12/14
20140162151
Humidification control method for fuel cell
A humidification control method includes the steps of detecting a direct current resistance component by measuring impedance during power generation of a fuel cell stack, calculating a reaction resistance component based on the detected direct current resistance component and a stack voltage, detecting a humidified state of the fuel cell stack based on the detected direct current resistance component and the calculated reaction resistance component, and adjusting a quantity of humidification of a reaction gas supplied to the fuel cell stack based on the detected humidified state of the fuel cell stack.. .
06/12/14
20140162150
Humidifying apparatus and method of fuel cell
A humidifying apparatus of a fuel cell is provided that includes a housing, a hollow fiber membrane module, valve, a sensor, and a controller. More specifically, a hollow fiber membrane module is disposed inside a housing.
06/12/14
20140159738
Method and apparatus for diagnosing fault within fuel cell stack
To diagnose a fault of a fuel cell stack, an alternating current having a first optimal frequency of a first frequency domain to diagnose a drop in cell voltage and an alternating current having a second optimal frequency of a second frequency domain to diagnose a cause of the drop in cell voltage are supplied to the fuel cell stack are provided. A distortion rate is then calculated based on voltage of the fuel cell stack according to the alternating current of the first optimal frequency, and the drop in cell voltage is diagnosed based on the calculated distortion rate.
06/05/14
20140154605
Fuel cell device and method of managing moisture within a fuel cell device
An exemplary fuel cell device includes a cell stack assembly having a plurality of fuel cells. A vapor barrier tape is wrapped around at least a portion of an exterior of the cell stack assembly.
06/05/14
20140154601
Module level redundancy for fuel cell systems
This disclosure relates to module level redundancy for fuel cell systems. A monitoring component monitors a set of operational parameters for a fuel cell group.
06/05/14
20140154600
Fuel cell system
A fuel cell system can be initiated in shorter time while minimizing the deterioration of a fuel cell. The fuel cell system includes a fuel cell stack having a fuel electrode, an oxidizer electrode and an electrolyte membrane disposed there between, the fuel cell producing electricity by an electrochemical reaction of a fuel gas and an oxidizer gas, which are supplied to the fuel electrode and the oxidizer electrode, respectively; a fuel gas supplying device for supplying the fuel gas to the fuel cell stack; an oxidizer gas supplying device for supplying the oxidizer gas to the fuel cell stack; a current controlling device for extracting a current from the fuel cell stack; and a voltage sensor disposed in at least two of the fuel cell stacks.
06/05/14
20140154599
Method and apparatus for simultaneous controlling of fuel concentration and temperature of liquid fuel by sensor-less and temperature-control based feed-back control, liquid fuel cell apparatus using the same
A concentration of a fuel supplied to a fuel cell and a heat exchange rate of a heat exchanger are controlled simultaneously in order to maintain a temperature of fuel cell stack and a diluted fuel concentration that is supplied to the fuel cell stack in a target level. Further, by appropriately responding to an exterior temperature changes or unexpected fuel cell performance changes, it is possible to improve a system efficiency and stability of fuel cell operation and to regulate the fuel concentration quickly and accurately compared to a prior sensor-less concentration controller..
06/05/14
20140153932
Integrated environmentally protective barrier with light blocking and light transmitting features to optically communicate between two electronic devices operating in different environments
An integrated environmental barrier for protecting the receiver portion of a fuel cell stack health monitoring system. The stack health monitoring system includes a transmitting measurement module and an optical communication module having a receiver.
05/29/14
20140147767
Sealing assembly for a fuel cell stack and method for manufacturing a fuel cell stack
In order to provide a sealing assembly for a fuel cell stack comprising a plurality of fuel cell units, which are arranged consecutively in a stacking direction, wherein each of the fuel cell units comprises a housing with at least one housing part made of a metallic material, which also has an adequate electrical insulation effect and an adequate mechanical strength at a high operating temperature of the fuel cell stack, it is proposed that the sealing assembly comprises at least one intermediate element made of a metallic material, wherein the intermediate element is soldered to a housing part of a first fuel cell unit at at least one location by means of a metal solder and is secured to a housing part of a second fuel cell unit at at least another location, wherein the intermediate element and/or the housing part of the first fuel cell unit is provided with a coating made of a ceramic material.. .
05/29/14
20140147765
Fuel cell stack
In a fuel cell stack, coolant supply passages are provided on both sides in the width direction of a coolant flow field. At an inlet of the coolant flow field, a substantially triangular inlet buffer is provided.
05/29/14
20140147759
Vehicle application for air storage cathode carbon loss estimation
A system and method for estimating an amount of carbon support loss in fuel cells of a fuel cell stack in a vehicle, for example, during vehicle off-times. The system and method include estimating an amount of time that a hydrogen concentration in the fuel cell stack is zero and calculating an amount of carbon loss based on the amount of time that the hydrogen concentration in the fuel cell stack is zero..


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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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