During Startup Or Shutdown Patents (Class 429/429)
  • Patent number: 11101476
    Abstract: The invention relates to a device and a method for isolating a fuel cell, which make it possible to safely work on the fuel cell during a servicing or repair operation.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: August 24, 2021
    Assignee: AUDI AG
    Inventor: Kai Müller
  • Patent number: 11101472
    Abstract: A resin film equipped MEA of a power generation cell includes a membrane electrode assembly and a resin film. An inner peripheral end of a first frame shaped sheet of the resin film is positioned outside an outer peripheral end of a cathode, and faces the outer peripheral end of the cathode so as to be separated by a gap. An inner peripheral portion of a second frame shaped sheet is held between the anode and the cathode. A first metal separator facing the first frame shaped sheet is provided with protruding support structure configured to support an inner peripheral portion of the first frame shaped sheet and an outer peripheral portion of the cathode.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: August 24, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kenji Sasaki, Yutaka Ebato, Takaaki Shikano, Takashi Kato, Sho Nakajima
  • Patent number: 11101488
    Abstract: A fuel cell system includes a plurality of fuel cell stacks, a power generation control unit that controls power generation of the plurality of fuel cell stacks based on a required power for the plurality of fuel cell stacks, and a refreshing control unit configured to perform a refreshing process of decreasing a voltage on the plurality of fuel cell stacks. The refreshing control unit performs the refreshing process on the first fuel cell stack when the required power changes from a state in which the required power is less than a first predetermined value to a state in which the required power is equal to or greater than the first predetermined value and when the required power is in a range which is equal to or greater than the first predetermined value and less than the second threshold value.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: August 24, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masayuki Ito
  • Patent number: 11094949
    Abstract: A fuel cell system includes: a fuel cell; a supply device; and a control unit configured to lower output voltage of the fuel cell to a target value so as to execute recovery processing to recover power generation performance of the fuel cell. In a case of having an execution request of the recovery processing, the control unit restarts power generation of the fuel cell when open circuit voltage of the fuel cell is lowered to or smaller than a threshold value higher than the target value by controlling a flow rate of a cathode gas while the power generation of the fuel cell is paused, and the control unit executes the recovery processing while controlling an output current value of the fuel cell to be smaller than an idle current value that is an output current value of the fuel cell in an idle operation state.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: August 17, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiko Kaneko, Masayuki Ito
  • Patent number: 11092652
    Abstract: Various embodiments manage a fuel cell IT grid system to maintain fuel cell temperatures above a threshold temperature. The system may include power modules each including a fuel cell, DC/DC converters each connected to a power module, a DC power bus connected to the DC/DC, IT loads each connected to the DC power bus, a load balancing load connected to the DC power bus, and a control device connected to a first power module. The control device may determine whether a temperature of the first power module exceeds the temperature threshold, determine whether an electrical power output of the power modules exceeds an electrical power demand of the IT loads in response to the temperature exceeding the temperature threshold, and direct excess electrical power output to the load balancing load in response to the electrical power output exceeding the electrical power demand.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: August 17, 2021
    Assignee: BLOOM ENERGY CORPORATION
    Inventor: Carl Cottuli
  • Patent number: 11083993
    Abstract: The invention relates to isotope separation methods, and methods for separating isotopes with low energy consumption, demonstrated using hydrogen isotopes. Also described are methods for enriching or depleting the isotope present in the hydrogen gas/vapour feed e.g. for tritium removal, tritium enrichment and deuterium enrichment, by arranging a series of cells in a cascaded configuration.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: August 10, 2021
    Assignee: ATOMIC ENERGY OF CANADA LIMITED
    Inventors: Keith Kutchcoskie, Nirmal Gnanapragasam, Hugh Boniface, Ian Castillo, Hongqiang Li
  • Patent number: 11063277
    Abstract: A method of controlling ignition of a vehicle having a fuel cell system is provided. In particular, the method includes a step of determining an idling state of the vehicle, a step of determining whether to enable a fuel cell on/off mode, a step of determining a degree of water balance of a fuel cell stack, and a step of turning off a vehicle's ignition switch. More specifically, a fuel cell system controller determines whether to enable a fuel-cell on/off mode based on a coolant temperature of the fuel cell system once the idling state is determined, and also determines a degree of water balance of a fuel cell stack of the fuel cell system. The fuel cell system controller turns off the vehicle's ignition switch, when a predetermined time passes, based on the degree of water balance.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: July 13, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Kevin Lee
  • Patent number: 11050070
    Abstract: Provided are a method and an apparatus controlling a water flooding failure in a fuel cell dual-stack system. The method includes: acquiring a hydrogen pressure drop reference value of the stack system in each normal working condition to obtain a control value; collecting a current pressure drop at a hydrogen side, and determining whether the current pressure drop at the hydrogen side is higher than the control value corresponding to a current normal working condition; determining a faulted stack according to voltages or currents of the first stack and the second stack if the current pressure drop at the hydrogen side is higher than the control value corresponding to the current normal working condition; reducing an opening degree of a flow regulating valve of the faulted stack, and increasing an opening degree of a flow regulating valve of the other stack.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: June 29, 2021
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Pucheng Pei, Peng Ren, Yuehua Li, Ziyao Wu, Dongfang Chen, Shangwei Huang, Xiaoning Jia
  • Patent number: 11050069
    Abstract: An illustrative example fuel cell cooler plate includes a first side configured to be received adjacent a fuel cell component and a second side facing opposite the first side. The first side defines a first surface area of the plate. An edge is transverse to the first side and the second side. The edge has a surface area that is less than the first surface area. A first coolant passage within the plate is closer to the second side than the first side. A second coolant passage is between the first side and the first coolant passage. The second coolant passage is in a heat exchange relationship with the first coolant passage.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: June 29, 2021
    Assignee: DOOSAN FUEL CELL AMERICA, INC.
    Inventor: Donald J. L. Roy
  • Patent number: 11031617
    Abstract: A fuel cell system installed in a mobile body comprises; a fuel cell; a gas supply flow path; an injection device provided on the gas supply flow path; a pressure regulating valve configured to be provided more on an upstream side than the injection device on the gas supply flow path, and to autonomously perform an opening/closing operation in accordance with a difference between pressure between the pressure regulating valve and the injection device on the gas supply flow path and pressure on an upstream side of the pressure regulating valve; and a control unit configured to control injection of the reaction gas by the injection device. The control unit calculates an injection interval of the injection device based on an upper limit operation count of the pressure regulating valve set in advance with respect to a predetermined traveling distance of the mobile body.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: June 8, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masahiro Okuyoshi, Toshihiro Egawa
  • Patent number: 11018354
    Abstract: A fuel cell system includes: a fuel cell; an air discharge passage configured to discharge an air exhaust gas from the fuel cell; a back pressure adjusting valve provided in the air discharge passage and configured to adjust pressure of the air exhaust gas; a cooling device configured to cool the fuel cell by carrying out heat exchange using a heat medium; a water reservoir storing water; a high pressure introduction passage connecting an upstream side of the air discharge passage which is more upstream than the back pressure adjusting valve in an air flow direction to the water reservoir; and a sprinkling device configured to sprinkle the water of the water reservoir over the cooling device. The sprinkling device is configured to sprinkle the water of the water reservoir pumped by pressure of the air exhaust gas over the cooling device.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: May 25, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Koyama, Katsuya Komaki, Kazutoshi Wakatsuki
  • Patent number: 11011761
    Abstract: A fuel cell system includes: a fuel cell stack of fuel cells that generate electricity by electrochemical reaction between hydrogen that is a fuel gas and oxygen that is an oxidant gas; an expander that is provided on a supply path of the fuel gas to the fuel cell stack, and at which, due to the fuel gas that is in a high-pressure state being supplied thereto, the fuel gas is expanded and the pressure thereof is reduced, and, due to the fuel gas being expanded and the pressure thereof being reduced, internal energy of the fuel gas is converted into mechanical energy; and a heating device that is provided further toward an upstream side of the supply path than the expander, and that heats the fuel gas.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: May 18, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masakatsu Tsubouchi
  • Patent number: 10990151
    Abstract: In embodiments, an apparatus includes a burst current monitor, to detect a burst of input current drawn by a SSD from a host above a pre-defined burst threshold, and control logic coupled to the burst current monitor. The control logic, in response to the detection by the burst current monitor of the input current above the burst threshold, causes a capacitor of the SSD to supply an assistance current to the SSD, to reduce the input current drawn by the SSD. In embodiments, the capacitor is a hold-up capacitor disposed in a PLI circuit of the SSD, and the apparatus is integrated within a hold-up control logic sub-circuit of the PLI circuit.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: April 27, 2021
    Assignee: Intel Corporation
    Inventors: Knut Grimsrud, Adrian Mocanu, Andrew Morning-Smith, Zeljko Zupanc
  • Patent number: 10985388
    Abstract: A method of estimating hydrogen crossover loss of a fuel cell system including a stack for producing power through a reaction of hydrogen serving as fuel and air serving as an oxidizer includes driving the fuel cell system; estimating a hydrogen crossover rate right after a channel of an anode is purged; determining whether a cell voltage of a fuel cell is normal; and comparing the estimated hydrogen crossover rate with a predetermined reference value based on a result of the determining of whether the cell voltage of the fuel cell is normal to determine whether a pinhole or leakage occurs. Accordingly, whether a pinhole or leakage occurs in the fuel cell system may be more effectively sensed.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: April 20, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jung Hwan Ryu, Soon Woo Kwon
  • Patent number: 10985389
    Abstract: A fuel cell power and control system may comprise a fuel cell stack configured to generate electric power, a fuel carrier for the fuel cell stack, at least one temperature control element in thermal communication with the fuel carrier, and an electronic control unit (ECU) configured to regulate electric current supplied to the temperature control element to control a rate at which a fuel is released from the fuel carrier. In various embodiments, the system further comprises an energy storage device configured to receive the electric power from the fuel cell stack. In various embodiments, the ECU is configured to vary the electric current supplied to the temperature control element in response to the voltage across the energy storage device varying.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: April 20, 2021
    Assignee: TACIT INTELLIGENCE LLC
    Inventors: Jeremy S. Daugherty, Michael A. Meinhart, Bryan G. Daugherty, Alan W. Koenig
  • Patent number: 10957929
    Abstract: A fuel cell system includes a first plurality of fuel cells having a cathode and an anode. The plurality of fuel cells is configured to produce electrical power having a current and a voltage output. The plurality of fuel cells includes a first conductive plate and a second conductive plate. A shunt is electrically connected to the first conductive plate and the second conductive plate for shunting voltage output between the cathode and the anode. The shunt is mounted to, and supported by, the plurality of fuel cells. The shunt is connected to a control mechanism to control a shorting of one or more fuel cells of the plurality of fuel cells. The control mechanism is mounted to, and supported by, the plurality of fuel cells.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: March 23, 2021
    Assignee: Plug Power Inc.
    Inventors: Scott Spink, David Lott, Arrol Bryant
  • Patent number: 10957928
    Abstract: Methods for measuring and controlling the methanol concentration in a methanol fuel cell such as a direct methanol fuel cell or fuel cell stack are disclosed. Processors and memory storage containing programs which execute instructions to control the methanol concentration in the fuel cell or fuel cell stack are also disclosed.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: March 23, 2021
    Assignee: Oorja Corporation
    Inventors: Md Opu, Rajinder Singh, Jeff Henderson, Aditya Koparkar
  • Patent number: 10938042
    Abstract: A fuel cell system includes: a fuel cell including an anode gas flow channel and a cathode gas flow channel and generating electricity from a hydrogen-containing anode gas of the anode gas flow channel and an oxygen-containing cathode gas of the cathode gas flow channel; an anode off-gas emission path through which an anode off-gas emitted from the anode gas flow channel flows; and a cathode off-gas emission path through which a cathode off-gas emitted from the cathode gas flow channel flows. After stoppage of generation of electricity by the fuel cell, gas purging is performed in which at least a part of the cathode off-gas emission path is purged with a hydrogen-containing gas having passed through a junction where the anode off-gas emission path and the cathode off-gas emission path meet each other. The hydrogen-containing gas contains at least either the anode gas or the anode off-gas.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: March 2, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akinori Yukimasa, Yoshito Usuki, Miki Abe
  • Patent number: 10897052
    Abstract: Provided is a fuel cell system including: a fuel cell; a tank that stores a fuel gas; a supply passage through which the fuel gas is supplied from the tank to the fuel cell; a first valve and a second valve that open and close the supply passage and are provided in order of the first valve, the second valve in a direction from an upstream side toward a downstream side; a pressure sensor that detects a pressure in a detection target region that is a region of the supply passage between the first valve and the second valve; a heating unit that heats the pressure sensor; and a controller that makes the heating unit heat the pressure sensor in a state in which a detection value of the pressure sensor is not larger than a predetermined threshold value.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: January 19, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke Fujita, Masayuki Ito
  • Patent number: 10886544
    Abstract: A fuel cell system FCS includes a fuel cell 10, a high voltage circuit 21 for driving an electromotor 42, and a relay 41 for electrically connecting or blocking the fuel cell 10 to or from the high voltage circuit 21. A control unit 50 obtains insulation decrease information in accordance with a request for starting the fuel cell, and performs, when a specified insulation decrease occurred region is not a fuel cell region SE1 including the fuel cell and the cooling circuit, conductivity reduction process on cooling liquid using a conductivity reduction unit 113 before having a relay 41 connect, and has the relay 41 connect after completing the conductivity reduction process.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: January 5, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryosuke Oya
  • Patent number: 10862144
    Abstract: A humidifier for a fuel cell enables moisture exchange between supply air supplied from an air compressor and exhaust air discharged from the fuel cell. In particular, the humidifier of the fuel cell may include: i) a housing main body; ii) a humidification membrane module that is provided in the housing main body; and iii) a bypass unit that is provided in the housing main body to selectively bypass the supply air supplied from the air compressor and the exhaust air discharged from the fuel cell.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: December 8, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Hyunyoo Kim, Sae Han Oh, Chang Ha Lee
  • Patent number: 10850617
    Abstract: A selector is to choose a target facility from the at least one facility based on a supplier position and a quantity of the energy suppliable. A distance calculator is to calculate a vehicle-facility distance from a current position to a facility position of a target energy supplier. A drivable range calculator is to calculate a drivable range of a vehicle based on a quantity of energy stored in an energy storage. A determining device is to determine whether or not to permit a power supplier to supply an electrical energy to an external device based on the vehicle-facility distance and the drivable range to control electricity supply from the power supplier to the external device.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: December 1, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Hiroyuki Kanazawa, Hakaru Sadano, Hajime Fujita
  • Patent number: 10840532
    Abstract: The present invention relates to flow battery systems including a flow battery and an electrolyte rebalancing system. In accordance with certain embodiments, the electrolytes used in the systems of the present invention are aqueous, and in one embodiment, bromine species are used as redox-active species.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: November 17, 2020
    Assignee: President and Fellows of Harvard College
    Inventors: Qing Chen, Roy G. Gordon, Michael J. Aziz
  • Patent number: 10826090
    Abstract: A method for controlling a fuel cell system is a method for controlling a fuel cell system including a solid oxide fuel cell which generates a power upon receiving supplies of an anode gas and a cathode gas. The method for controlling the fuel cell system includes; as a stop control of the fuel cell, stopping a supply of the anode gas while continuing a supply of the cathode gas to the fuel cell, and shutting off a discharge side of an anode of the fuel cell; and carrying out an additional control to supply the anode gas to the fuel cell during the stop control and/or an additional control to decrease the flow rate of the cathode gas during the stop control.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: November 3, 2020
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Susumu Maeshima
  • Patent number: 10818946
    Abstract: A fuel cell system that has a fuel cell stack is provided. The system includes an electrolyte membrane, and a cathode and an anode that are a pair of electrodes disposed on opposite sides of the electrolyte membrane. A controller applies voltages to the cathode and the anode of the fuel cell stack before hydrogen that operates the fuel cell stack is supplied to the anode. When the voltages are applied to the cathode and the anode, hydrogen that resides in the cathode flows to the anode through the electrolyte membrane to decrease the concentration of the hydrogen in the cathode. The fuel cell system reduces the concentration of hydrogen discharged to the outside of the vehicle by reducing the concentration of hydrogen in the cathode before driving of the fuel cell is initiated.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: October 27, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sae Kwon Chang, Hyuck Roul Kwon, Hyun Jae Lee
  • Patent number: 10804551
    Abstract: A fuel cell system comprises a fuel cell; a reactive gas supply mechanism configured to supply a reactive gas to the fuel cell; a discharge flow path configured to discharge an off-gas and water discharged from the fuel cell; a valve provided in the discharge flow path; a remaining water purging controller configured to control a remaining water purging process of the fuel cell by using the reactive gas supply mechanism and the valve; a heating portion configured to heat the valve; and a failure detector configured to detect a failure of the heating portion. When a failure of the heating portion is detected, the remaining water purging controller performs the remaining water purging process and increases a water discharge power in the remaining water purging process than a water discharge power in the remaining water purging process performed when no failure of the heating portion is detected.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: October 13, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Ogawa, Tsuyoshi Maruo, Shun Matsumoto, Hiroyuki Tsunekawa
  • Patent number: 10790518
    Abstract: An electrical contact device for the diversion of electrical current from a fuel cell stack can have a plurality of electrically conductive contact regions which are delineated from each other. A plurality of electrically conductive first contact structures connects each, or a plurality of, the contact region(s) to an external load current circuit. Via at least one switching element arranged in a first contact structure, an electrically conductive connection may be disconnected by the first contact structure, in particular between at least one contact region and a load current circuit. In this way it is possible to adjust the overall resistance of the contact structure, and thus the Joule heat produced in the contact regions. Second contact structures that are arranged between the contact regions enable a further increased variability of the overall electrical resistance of the contact device.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: September 29, 2020
    Assignees: VOLKSWAGEN AG, AUDI AG
    Inventors: Ian Stewart, Bevan Hoskyn Moss
  • Patent number: 10770740
    Abstract: A method of shutting down operation of a fuel cell vehicle includes: blocking, by a controller, an air supply to a fuel cell stack when an operation shutting down command of the fuel cell vehicle is applied; increasing, by the controller, a voltage at an rear end of a stack main relay connected to the fuel cell stack; and opening, by the controller, the stack main relay when the voltage at the rear end of the stack main relay is higher than a stack voltage by a predetermined voltage or more.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: September 8, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Dae Jong Kim
  • Patent number: 10759294
    Abstract: A power source system may include a main power source, a power converter including a capacitor, a relay configured to switch between connection and disconnection between the power converter and the main power source, an auxiliary power source, a boost converter having a low voltage terminal thereof connected to the auxiliary power source, and having a high voltage terminal thereof connected to the power converter without interposing the relay, and a controller configured to pre-charge the capacitor prior to placing the relay in a connected state when a main switch of a vehicle is turned on. The controller may be configured to store a peak value of a current of the auxiliary power source in a memory of the controller, and start to pre-charge the capacitor when a current of the auxiliary power source falls from the peak value by more than a predetermined current difference.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: September 1, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takashi Nozawa
  • Patent number: 10759412
    Abstract: A method for identifying a driving pattern for fuel economy improvement of a hybrid vehicle is provided. The method includes allocating priorities in accordance with influences exerted on fuel economy based on a heating load and an electric load. A current driving pattern is then selected in the order of a high heating load driving pattern, a high electric load driving pattern, an aggressive driving pattern, a high speed driving pattern, and a city driving pattern.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: September 1, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jae-Yun Shim, Il-Kwon Park, In-Eok Cho, Hoon Han, Jae-Mun Lee, Dong-Su Ha, Dong-Jun Shin, Kyung-Taek Lee
  • Patent number: 10728633
    Abstract: A sensor node of a sensing network acquires first sensing data from an internal sensing node and/or second sensing data via an interface from an external sensing node. The sensor node is configured with a selected configuration file. The first and second events are detected as a function of the first and/or second sensing data based on the configuration file. The method further includes performing a first action set of the plurality of action sets as a function of detecting the first event and performing a second action set of the plurality of action sets as a function of detecting the second event, wherein the first and second action sets are defined by the configuration file. Once configured with the configuration file, detecting the first and second events and performance of any of the first and second action sets is performed autonomously of a controller or host of a system being monitored by the sensing network.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: July 28, 2020
    Assignee: Simmonds Precision Products, Inc.
    Inventors: Travis Gang, Travis Dement, Benjamin T. Rule, Thomas Henck
  • Patent number: 10727503
    Abstract: A separator for a fuel cell includes a channel having a passage that is a flow path of a reaction gas, a manifold part formed at a peripheral of the channel and communicating with the passage such that the reaction gas is introduced into and discharged from the channel, and a connector connecting the channel and the manifold part such that the reaction gas flows between the channel and the manifold part. The manifold part includes an inlet manifold through which the reaction gas is introduced into the channel and formed at a lower portion of the channel, and an outlet manifold configured to discharge the reaction gas from the channel to an outside of the fuel cell and formed at an upper portion of the channel.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: July 28, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jae Jun Ko, Chi Seung Lee, Seung Ah Yu, Young Woo Noh
  • Patent number: 10680258
    Abstract: An electrical power supply system has a fuel cell module and a battery. The fuel cell can be selectively connected to the battery system through a diode. The system preferably also has a current sensor and a controller adapted to close a contactor in a by-pass circuit around the diode after sensing a current flowing from the fuel cell through the diode. The system may also have a resistor and a contactor in another by-pass circuit around the diode. In a start-up method, a first contactor is closed to connect the fuel cell in parallel with the battery through the diode and one or more reactant pumps for the fuel cell are turned on. A current sensor is monitored for a signal indicating current flow through the diode. After a current is indicated, a by-pass circuit is provided around the diode.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: June 9, 2020
    Assignee: HYDROGENICS CORPORATION
    Inventor: Paolo Forte
  • Patent number: 10680259
    Abstract: A method is disclosed for regenerating an electrode of a flow battery. The method can be executed during shutdown of the flow battery from an active charge/discharge mode to an inactive, shut-down mode in which neither a negative electrolyte nor a positive electrolyte are circulated through at least one cell of the flow battery. The method includes driving voltage of the least one cell of the flow battery toward zero by converting, in-situ, the negative electrolyte in the at least one cell to a higher oxidation state. The negative electrolyte is in contact with an electrode of the at least one cell. The higher oxidation state negative electrolyte is used to regenerate, in-situ, catalytically active surfaces of the electrode of the at least one cell.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: June 9, 2020
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventors: Andrew Smeltz, Michael L. Perry, Robert Mason Darling
  • Patent number: 10665881
    Abstract: A redox flow battery system includes pumps, a pump control unit, an SQC measuring unit, and a terminal-voltage measuring unit. The pump control unit includes a reference-flow-rate acquiring unit which acquires a reference flow rate of the pumps corresponding to the state of charge of electrolytes; a terminal-voltage determination unit which determines whether or not a terminal voltage of a battery cell reaches the lower limit or the ripper limit of a predetermined voltage range; and a pump-flow-rate setting unit which sets the reference flow rate for the pumps in the case where the terminal voltage does not reach the upper or lower limit of the predetermined voltage range, and sets a flow rate obtained by adding a predetermined flow rate to the reference flow rate for the pumps in the ease where the terminal voltage reaches the upper or lower limit of the predetermined voltage range.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: May 26, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takahiro Kumamoto, Kazuhiro Fujikawa, Katsuya Yamanishi
  • Patent number: 10665876
    Abstract: A control unit of a fuel cell system includes a valve control unit configured such that, when it is determined that an exhaust valve is stuck open in a quick warming-up operation, the valve control unit sets at least one of an operable opening area which is an opening area capable of being changed by control and a rate of opening change which is an opening changeable frequency at which an opening is changeable per unit time, for at least one of a pressure adjusting valve and a flow division valve, such that a flow rate of a cathode gas supplied to a fuel cell is in an allowable range of a requested supply flow rate required for the quick warming-up operation.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 26, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomio Yamanaka, Masashi Toida, Hiroyuki Imanishi, Seiichi Tanaka
  • Patent number: 10658686
    Abstract: A fuel pressure regulator unit is mounted on a manifold. The fuel pressure regulator unit includes a housing providing a fuel inlet passage, a regulated fuel outlet passage, a sense pressure passage, a recycle passage and a mixed fuel passage. A pressure regulator is provided in the housing and is arranged fluidly between the fuel inlet passage and the regulated fuel outlet passage. The sense passage fluidly interconnects the mixed fuel passage and the pressure regulator. The pressure regulator is configured to regulate the flow of fuel from the fuel inlet passage to regulated fuel passage in response to a pressure from the sense pressure passage. An ejector is arranged within the housing and fluidly between the regulated fuel outlet passage and the mixed fuel passage. An ejector is configured to receive recycled fuel from the recycle passage.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: May 19, 2020
    Assignee: AUDI AG
    Inventors: Garrett W. Fink, David Melo Ferreira, Christopher John Carnevale
  • Patent number: 10622648
    Abstract: A constant voltage control method for a fuel cell vehicle includes: determining whether vehicle state information satisfies a cold start condition when the fuel cell vehicle is started; starting constant voltage control on a fuel cell when the vehicle state information satisfies the cold start condition; comparing an RPM of an air blower for supplying air to the fuel cell with a predetermined stop control condition; and terminating the constant voltage control on the fuel cell when the RPM of the air blower satisfies the predetermined control-stopping condition.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 14, 2020
    Assignee: Hyundai Motor Company
    Inventors: Dae Jong Kim, Ki Chang Kim, Jung Jae Lee, Sang Chul Yeom
  • Patent number: 10608263
    Abstract: A coolant bypass structure includes a main loop forming a channel in which coolant circulates; a bypass loop connected to the main loop and forming a selective bypass channel; and a stack bypass valve provided between the main loop and the bypass loop to open and close the bypass loop according to a predetermined temperature, and provided with an outlet temperature sensor. The coolant bypass structure may improve marketability by decreasing the starting time of the fuel cell vehicle in a frozen state and improve power efficiency.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: March 31, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung Wook Na, Sun Heum Baek, Hyung Kook Kim, Hun Woo Park, Dae Jong Kim, Su Dong Han
  • Patent number: 10608265
    Abstract: A system for controlling low-temperature starting of a fuel cell vehicle includes a high-pressure hydrogen flow control valve controlling a flow of hydrogen supplied to a fuel cell stack. A fuel cell controller is configured to change and control an opening rate of the high-pressure hydrogen flow control valve when an internal temperature of the fuel cell stack is a reference value or less. When the opening rate of the high-pressure hydrogen flow control valve decreases, a pressure of the hydrogen passing through the high-pressure hydrogen flow control valve decreases to increase a temperature of the hydrogen which is supplied to the fuel stack.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: March 31, 2020
    Assignee: Hyundai Motor Company
    Inventors: Ji Hyun Shim, Chang Ho Kim, Sang Hyun Kim
  • Patent number: 10593968
    Abstract: A fuel cell system employs a fuel cell stack having an air electrode, an electrolyte membrane, and a fuel electrode. The fuel cell system includes an air residual space, from which air supplied to the air electrode is not discharged to stay behind therein when the fuel cell system is stopped. The air residual space communicates with the air electrode. The fuel cell system includes a hydrogen residual space, from which hydrogen supplied to the fuel electrode is not discharged to stay behind therein when the fuel cell system is stopped. The hydrogen residual space communicates with the fuel electrode. A residual ratio satisfies a specific reference range and corresponds to a ratio of the molecular number of hydrogen that stays behind in the hydrogen residual space to the molecular number of oxygen in air that stays behind in the air residual space when the fuel cell system is stopped.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: March 17, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Hyuck Roul Kwon
  • Patent number: 10581084
    Abstract: A method of activating a catalyst for a fuel cell in order to perform catalyst activation in a cathode electrode of the fuel cell includes a first process in which hydrogen is supplied into an anode electrode, the side of an air supply line of the cathode electrode is sealed, and the side of an air exhaust line of the cathode electrode is opened to an atmosphere, a second process in which the side of the air exhaust line of the cathode electrode is sealed after the first process, and a third process in which catalyst activation is performed in the cathode electrode after the second process.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: March 3, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazumi Sugita, Kosuke Katsuta, Naotoshi Miyamoto, Shigemitsu Nomoto
  • Patent number: 10573909
    Abstract: A fuel cell system includes: a fuel cell stack; a voltage sensor configured to detect voltage of the fuel cell stack; a fuel cell relay connected to the fuel cell stack; a switch connected between the fuel cell stack and the fuel cell relay; an overcurrent detector configured to detect an overcurrent flowing to the switch; and a power generation stop device configured to stop power generation of the fuel cell stack when the overcurrent detector detects the overcurrent and the detected voltage becomes a specified value or less.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: February 25, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Umehara, Shinji Aso
  • Patent number: 10541431
    Abstract: A cooling arrangement for cooling a fuel cell in a fuel cell system is disclosed. The cooling arrangement has at least two fluidically connected cooling circuits in which a liquid coolant medium flows, The first cooling circuit includes a first coolant pump, a fuel cell heat exchanger, a heating unit, and a charge air cooler, which is in heat-exchanging contact with compressed supply air flowing to the fuel cell. The second cooling circuit includes a cooling heat exchanger for cooling the liquid coolant medium. The cooling arrangement includes at least one further coolant pump.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: January 21, 2020
    Assignee: Daimler AG
    Inventors: Maximilian Buehler, Uwe Pasera, Ottmar Schmid, Bernhard Vogel
  • Patent number: 10522862
    Abstract: A thermo-electro-chemical converter direct heat to electricity engine has a monolithic co-sintered ceramic structure or a monolithic fused polymer structure that contains a working fluid within a continuous closed flow loop. The co-sintered ceramic or fused polymer structure includes a conduit system containing a heat exchanger, a first high density electrochemical cell stack, and a second high density electrochemical cell stack.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: December 31, 2019
    Assignee: Johnson IP Holding, LLC
    Inventor: Lonnie G. Johnson
  • Patent number: 10522857
    Abstract: The disclosure relates to a fuel cell stack and corresponding method of operating the fuel cell stack. The method comprises: determining a maximum allowable current that may be drawn from the fuel cell stack; repeatedly determining a magnitude of change to the prevailing maximum allowable current based on a prevailing allowable current ramp rate and an actual measured current of the fuel cell stack; updating the maximum allowable current according to the periodically determined magnitude of change; and controlling operating parameters of the fuel cell stack according to the prevailing maximum allowable current.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: December 31, 2019
    Assignee: Intelligent Energy Limited
    Inventor: Jeremy Bowman
  • Patent number: 10516179
    Abstract: A fuel cell system includes a fuel cell stack having a plurality of cells each having hydrogen channels, a hydrogen channel inlet, and a hydrogen channel outlet, a load supplied with power from the fuel cell stack, a circulation passage connecting the channel inlet with the channel outlet, a hydrogen pump provided in the circulation passage, and a controller. The controller rotates the hydrogen pump in a positive direction so as to feed the hydrogen gas in a first amount into each cell through the channel inlet, at a flow rate larger than a minimum flow rate required for power generation, and then rotate the hydrogen pump in a negative direction so as to feed the hydrogen gas into each cell through the channel outlet, during a period from stop of power supply to the load, to the next start of power supply.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: December 24, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiro Ogawa, Tsuyoshi Maruo, Shun Matsumoto, Hiroyuki Tsunekawa
  • Patent number: 10511041
    Abstract: A method of controlling the operation of a fuel cell system is provided. The method includes diagnosing a water shortage state in a fuel cell stack based on degradation of cooling performance and deterioration of the fuel cell stack and determining a diagnosis level of the fuel cell system based on the diagnosed water shortage state of the fuel cell stack. In addition, a regenerative operation is performed by selecting a regenerative operation mode which corresponds to the determined diagnosis level.
    Type: Grant
    Filed: November 16, 2014
    Date of Patent: December 17, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Sang Uk Kwon
  • Patent number: 10511037
    Abstract: An apparatus for removing moisture of a stack enclosure includes a protective case accommodating a fuel cell stack therein, a radiation heater mounted at a lower surface of the protective case, the radiation heater enabling discharged air to move toward an upper part of the protective case, and a cooler for cooling air moving along the upper part of the protective case, the cooler guiding cooled air to move toward the lower surface of the protective case.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: December 17, 2019
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Haeng Jin Ko
  • Patent number: 10497952
    Abstract: A vehicle includes a fuel cell having a stack for generating power and a controller. The controller is programmed to, in response to a fuel cell temperature decreasing to less than a temperature threshold after a shutdown, initiate a primary purge of the stack and terminate the primary purge at a predetermined anode pressure.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: December 3, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Matthew Riley, Craig Michael Mathie, Kevin Wujcik, William Frederick Sanderson, Jr.