During Startup Or Shutdown Patents (Class 429/429)
  • Patent number: 11489183
    Abstract: A fuel cell system includes a fuel cell stack including fuel and air electrodes, a fuel gas supply module configured to supply hydrogen and oxygen, as fuel gases, to the fuel cell stack, a fuel gas supply line including channels through which the fuel gases are supplied to the fuel cell stack, a humidification module disposed in the fuel gas supply line and configured to supply moisture to the fuel gases, and a controller configured to control the fuel gas supply line such that the fuel gases bypass the humidification module and are directly supplied to the fuel cell stack when temperature of the fuel cell stack is determined low at an initial stage of operation of the fuel cell stack, and the fuel gases pass through the humidification module and are supplied to the fuel cell stack when the temperature reaches a normal temperature.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: November 1, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Ju Hae Jung, Hyun Bae Dong
  • Patent number: 11479125
    Abstract: A braking control unit of a fuel cell vehicle is configured to, in a period during which the fuel cell vehicle is being braked in response to a braking request, (i) when an estimated amount of stagnant water is less than a predetermined second water amount less than a first water amount, limit an upper limit electric power of a regenerated electric power resulting from regenerative operation to a predetermined first value or below, and (ii) when the estimated amount of stagnant water is greater than or equal to the second water amount, execute an upper limit changing process of setting an upper limit electric power to a second value lower by a predetermined value than the first value.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: October 25, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Junichi Oura, Ryouichi Namba
  • Patent number: 11476482
    Abstract: Provided is a fuel cell system capable of suppressing the movement of an operating point of a compressor between a surge region and a non-surge region to reduce operation sounds and vibrations, the fuel cell system including at least: a fuel cell; a compressor; a dry state estimation part to estimate a dry state of the fuel cell; and a pressure target control part to control a pressure target, wherein the pressure target control part is capable of executing at least rise control and lower control, the rise control and the lower control being such that an operating point of the compressor is positioned outside a surge region, a current pressure target is corrected to the value same as a last pressure target if the current pressure target is lower (higher) than the last pressure target when the rise control (lower control) is being carried out.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: October 18, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shuya Kawahara, Hiroyuki Imanishi, Takeho Aisaka
  • Patent number: 11476480
    Abstract: A steam vaporizer assembly includes an internal steam generator having a vessel configured to hold water, a vaporizer unit having a heating element configured to heat the water to generate saturated steam; and a controller configured to: cause the heating element to heat the water to a stand-by temperature; and while maintaining a water level of the water in the vessel between two control points: maintain the water in the vessel at the stand-by temperature until steam generation is required, and when steam generation is required, heating the water in the vessel from the stand-by temperature to a temperature at or above a vaporization temperature of the water using a heating element, to generate the steam.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: October 18, 2022
    Assignee: FuelCell Energy, Inc.
    Inventors: Frank Dobek, Stephen Jolly, Keith Davis
  • Patent number: 11469429
    Abstract: A fuel cell system ensures estimation on a cooling capacity by produced water in an intercooler when water is provided. A control device in a fuel cell system includes a freeze determination unit, a required pressure calculator, a discharge pressure setting unit, a power supplying unit, and a melting estimation unit. The freeze determination unit determines a freezing of produced water in an intercooler. The required pressure calculator calculates a pressure of air discharged from an air compressor. The discharge pressure unit sets the discharge air compressor to a melt pressure when the required pressure is the melt pressure or more. The power supplying unit performs power generation with the melt pressure for a melting period set to melt the frozen produced water, and supplies the generated power to the motor. The unit estimates the melting of the frozen water in the intercooler has completed after the melting period.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: October 11, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yuya Kusano
  • Patent number: 11469431
    Abstract: A system for estimating a concentration of hydrogen in a fuel cell is provided. The system includes a hydrogen supply line supplying the hydrogen to the fuel cell and a time measurement sensor measuring a time duration from a point in time when an operation of the fuel cell ends to a point in time when the fuel cell restarts. A controller estimates an amount of air introduced into the fuel cell during the time duration using the measured time duration and estimates a concentration of hydrogen in the hydrogen supply line at the time of restarting the fuel cell based on the measured time duration and the estimated amount of introduced air.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: October 11, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Soon Woo Kwon, Hyun Jae Lee
  • Patent number: 11462757
    Abstract: A fuel cell system includes first and second fuel cells, first and second coolers cooling coolant, first and second coolant supply path from the coolers to the fuel cells, first and second coolant discharge paths from the fuel cells to the coolers, a detour path connecting the first coolant supply path and the first coolant discharge path bypassing the first cooler, an adjusting device adjusting a flow rate of coolant of the detour path, first and second connection paths connecting the coolant supply paths and the coolant discharge paths, first and second opening/closing valves in the connection paths, and a controller configured to, when there is a possibility of flooding, suspend power generation of the first fuel cell and control the adjusting device or the first cooling device such that a temperature of the coolant of the first fuel cell increases, and open the opening/closing valves.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: October 4, 2022
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Koichiro Ikeda
  • Patent number: 11431005
    Abstract: Disclosed is a high-temperature operating fuel cell system including: a fuel cell stack; a combustor that combusts a cathode off-gas and an anode off-gas; a heat insulator that covers at least part of the fuel cell stack and at least part of the combustor; a first preheater that covers at least part of the heat insulator and preheats an oxidant gas; an oxidant gas feeder that supplies the oxidant gas to the first preheater; a vacuum heat insulator that covers at least part of the first preheater; a sensor that detects information indicating stopping of a power generation operation; and a controller. When a determination is made that the power generation has stopped, the controller controls the oxidant gas feeder to supply the oxidant gas to the first preheater so that the temperature of the vacuum heat insulator is equal to or lower than a prescribed temperature.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: August 30, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hideki Nakata, Kunihiro Ukai, Masakazu Aoki
  • Patent number: 11431009
    Abstract: A power management server controls a fuel cell system including a power generator. The power management server includes at least one processor. The processor is configured to execute a reception process and control process. The reception process incudes a reception process of receiving a massage including an information element indicating an operation state of the fuel cell system. The control process includes a control process of controlling the fuel cell system which the operation state is a power generating state, in preference to the fuel cell system which the operation state is a starting up state, stopping state, and stop operating state, in a control target period.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: August 30, 2022
    Assignee: KYOCERA CORPORATION
    Inventor: Ryota Terai
  • Patent number: 11411232
    Abstract: A process for starting a PEM fuel cell module includes blowing air through the cathode side of the module using external power. An amount hydrogen is released into the anode side of the module under a pressure greater than the pressure of the air on the cathode side, while the anode is otherwise closed. Cell voltages in the module are monitored for the appearance of a charged state sufficient to start the module. When the charged state is observed, the module is converted to a running state.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: August 9, 2022
    Assignee: Hydrogenics Corporation
    Inventors: Nathaniel Ian Joos, Paolo Forte, Jin Kim
  • Patent number: 11398632
    Abstract: A fuel-cell vehicle in which a fuel cell which is a driving power source is mounted includes a refrigerant flow passage that is connected to the fuel cell, a first pump that causes a refrigerant to flow in the refrigerant flow passage, a heater that heats the refrigerant, and a connection part that is electrically connected to the heater and the first pump and that is used for electrical connection to an external power source which is provided outside the fuel-cell vehicle. The heater and the first pump are driven with electric power supplied from the external power source which is connected thereto via the connection part.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: July 26, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masaya Yano
  • Patent number: 11398633
    Abstract: A coolant storage tank (1) for storing coolant in a fuel cell system (2), the coolant storage tank comprising a plurality of individually controllable heater elements (7, 8a, 8b). A coolant storage tank comprising a first heater element (7) located at a base of the coolant storage tank and a second heater element (8a) is also disclosed. A coolant storage tank comprising a first coolant storage compartment (50) in fluid communication with a second coolant storage compartment (51), the first coolant storage compartment including at least a first heater element (54) and wherein the second coolant storage compartment is unheated is also disclosed. A method of melting frozen coolant in a coolant storage tank is also disclosed.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: July 26, 2022
    Assignee: Intelligent Energy Limited
    Inventors: Daniel Ninan, Nathaniel Palmer, Sophie Charlotte Harris, Phillip Wardle, Jonathan Cole, Iain Fraser, Peter David Hood, Paul Leonard Adcock
  • Patent number: 11387473
    Abstract: An apparatus configured for controlling emergency driving for a fuel cell vehicle may include a failure detector configured to detect whether a purge valve and a drain valve fails; a determination portion configured to measure voltages of channels of a fuel cell stack to determine whether stability of the fuel cell stack is secured; and a controller configured to control, when the stability of the fuel cell stack is not secured and a failure occurs on one or more of the purge valve and the drain valve, one or more of an operating pressure and an operating temperature of the fuel cell stack and a current applied to the fuel cell stack.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: July 12, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Ik Jae Son
  • Patent number: 11380921
    Abstract: A system includes an electrical storage device that stores an electric power generated by a fuel cell, an electric load to which the electric power is supplied using the electric power of the fuel cell and/or the electrical storage device, and an electric power control part that controls supply of the electric power to the electric load, and the electric power control part performs warming-up control of the fuel cell when an electric power requested to be generated at the fuel cell is less than a predetermined value, and causes the fuel cell to generate an electric power that is greater than the electric power requested to be generated at the fuel cell and causes to store excess electric power in the electrical storage device when the electric power requested to be generated at the fuel cell is equal to or greater than the predetermined value.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: July 5, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Ryoji Sakai, Akihiro Matsui
  • Patent number: 11362357
    Abstract: A system and method for generating vibrations in a fuel cell system include a vibration device which can be arranged on the fuel cell system or is formed by at least one component of the fuel cell system, for generating excitation vibrations which can be transmitted to the component. An electronic actuating system includes a controller and memory for actuating the vibration device, which may include a coolant pump or a compressor, at a natural frequency of a fuel system component for de-icing. At temperatures below 0° C., the electronic actuating system is adapted to actuate the vibration device during a switch-on process and/or a switch-off process of the fuel cell system taking into consideration at least one natural frequency of the component. Embodiments including actuating a compressor, cooling pump, and/or valve to transmit vibrations to a component to be de-iced at a natural frequency of the component.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: June 14, 2022
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Julio Orozco Santos Coy, Rolf Lorenz Loeffler, Arnulf Sponheimer
  • Patent number: 11362350
    Abstract: The invention concerns fuel cell systems and methods for converting chemical energy of a fuel containing hydrogen into electricity. According to the invention, a fuel cell stack is provided having at least one anode and one cathode separated by a proton-exchange membrane. A fuel transport circuit feeds fuel to the fuel cell stack, and a temperature control system is adapted to control the temperature of the fuel cell stack by circulating a coolant medium through said fuel cell stack. The temperature control system includes a pump for circulating the coolant medium, a heater unit connected to a coolant transport circuit for heating the coolant with a PTC heater, a heat radiation unit connected to the coolant transport circuit for removing excess heat, and a temperature sensor.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: June 14, 2022
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventor: Pauli Koski
  • Patent number: 11362345
    Abstract: Disclosed is a cooling module for use in a fuel cell system, the module includes a tank configured to receive a coolant therein, a coolant, a pump in fluid communication with the coolant in the tank and the fuel cell system, the pump being configured to transport the coolant to the fuel cell system, a heating element within the coolant in the tank, the heating element configured to heat the coolant, and at least one sensor in signal communication with a controller and in fluid communication with the tank. The sensor is configured to detect a change corresponding to the presence or absence of sufficient liquid coolant to initiate said pump, and the controller processes sensor data and is configured to actuate the pump.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: June 14, 2022
    Assignee: Intelligent Energy Limited
    Inventors: Pratap Rama, Nathaniel Thomas Palmer, Sophie Charlotte Harris, David James Grimwade, Prajwal Nirwan
  • Patent number: 11349138
    Abstract: A cold start control method for a fuel cell is provided. The method includes determining whether a cold start condition upon start on is satisfied and estimating thawing energy required to thaw frozen moisture inside a fuel cell stack when the cold start condition has been satisfied. A thawing control SOC of a high-voltage battery is calculated based on the estimated thawing energy. The cooling water inside a cooling water line for cooling the fuel cell stack is heated by using a heater having received power from the high-voltage battery when the current SOC of the high-voltage battery is equal to or less than a thawing control SOC.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: May 31, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Jung Hwan Ryu
  • Patent number: 11302938
    Abstract: A fuel cell system includes: a fuel cell stack; a first cooling medium circuit through which a cooling medium for cooling the fuel cell stack flows; an ion exchanger that removes ions in the cooling medium; a second cooling medium circuit in which the average ion concentration of the cooling medium is lower than that of the cooling medium in the first cooling medium circuit; a switching valve that switches between a flow state and a low flow state; a pump configured to cause the cooling medium in the second cooling medium circuit to flow into the first cooling medium circuit; and a control unit that, when a stop period of the fuel cell system is longer than a reference period, drives the pump with the switching valve switched to the flow state after the instruction to start the fuel cell system is input.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: April 12, 2022
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keita Yamaue, Yohei Okamoto, Hiroyuki Imanishi
  • Patent number: 11296335
    Abstract: A fuel cell system comprising: a first line configured to pass through a fuel cell stack and allow a coolant to circulate therein; a pump provided in the first line; a second line having one end connected to the first line at a first point positioned between an outlet of the pump and the fuel cell stack, and the other end connected to the first line at a second point positioned between an inlet of the pump and the fuel cell stack; a heater provided in the second line to heat the coolant flowing along the second line; and a third line configured to pass through an air conditioning unit, connected to the first line between the first point and an outlet of the fuel cell stack, and configured to allow a part of the coolant to circulate therein.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: April 5, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jin Hun Lee, Oh Tak Kwon, Wook Il Jang, Hun Woo Park, Tae Geun Kim
  • Patent number: 11296334
    Abstract: An FC (fuel cell) system includes: an FC; a radiator configured to cool a CL (cooling liquid); an ion exchanger provided in a BFP (bypass flow path) branched off from a CFP (circulation flow path) for allowing the CL to circulate between the FC and the radiator; a multi-way valve provided in a branching point at which the BFP is branched off from the CFP; and a pump which circulates the CL. A percentage of the CL that is made to flow through the BFP can be controlled by the multi-way valve. In a case in which a stop time is longer than a threshold time when the FC system is started up, after the CL is circulated through the radiator, the CL is circulated through the BFP at the percentage of 80% or more until electrical conductivity of the CL becomes smaller than a threshold electrical conductivity.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: April 5, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita Yamaue, Shigeki Hasegawa, Hiroyuki Imanishi, Tomotaka Ishikawa
  • Patent number: 11289722
    Abstract: Introduced is an fuel cell power net including a fuel cell configured to generate power through a reaction between a fuel gas and an oxidizing gas, a power storage device configured to be charged with power generated by the fuel cell or discharged to supply power, a main line configured to electrically connect the fuel cell and the power storage device to each other; a main relay disposed on the main line so as to break or make an electrical connection between the fuel cell and the power storage device, a bypass line which is branched from the main line, bypasses the main relay, and is connected to the power storage device, a bypass relay disposed on the bypass line so as to break or make an electrical connection of the bypass line, and a controller configured to control the main relay or the bypass relay such that the power stored in the storage device is supplied to the fuel cell while the power generation of the fuel cell is stopped.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: March 29, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jong Hyun Lee, Keun Bong Ham
  • Patent number: 11289724
    Abstract: A fuel cell vehicle includes a hydrogen injector, a controller, and a first power supply. The hydrogen injector is configured to open when supplied with a current large than or equal to a predetermined current threshold. The controller is configured to control a current that is supplied to the hydrogen injector such that the supply current follows a target current value. The first power supply is configured to supply electric power to the hydrogen injector and a prescribed auxiliary. The controller is configured to increase the target current value when the controller detects at least one of a first start signal for starting the prescribed auxiliary and a second start signal for informing startup of the prescribed auxiliary.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: March 29, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masato Nonaka
  • Patent number: 11283090
    Abstract: The present disclosure relates to an apparatus and a method for controlling a concentration of exhaust hydrogen in a fuel cell system. The apparatus may include an air exhaust valve for discharging hydrogen from a cathode in a fuel cell stack to an outside environment through an air exhaust line, an air compressor for supplying ambient air to the air exhaust line, an air cut-off valve for blocking air supplied to the cathode, and a controller that opens the air exhaust valve and drives the air compressor when starting to supply hydrogen to the fuel cell stack, and opens the air cut-off valve such that a concentration of the hydrogen discharged from the cathode is reduced by air in the air exhaust line when the hydrogen supply is completed.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: March 22, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jae Ho Han, Jae Won Jung, Jai Hyun Ahn, Dae Jong Kim, Hyun Jae Lee
  • Patent number: 11283089
    Abstract: A fuel cell system includes: a fuel cell; an oxidant gas supply unit configured to supply an oxidant gas to a cathode electrode of the fuel cell; and a gas pressure control unit configured to detect as a gas pressure sensitivity a ratio of variation in an output of the fuel cell to variation in the pressure of the oxidant gas, specify a correspondence relationship between the pressure of the oxidant gas and the output of the fuel cell on the basis of the detected gas pressure sensitivity, and control the pressure of the oxidant gas on the basis of the specified correspondence relationship.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: March 22, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaaki Matsusue, Masanori Aimu
  • Patent number: 11251444
    Abstract: A shutoff valve, a first gas pressure sensor, a pressure reducing valve, a second gas pressure sensor, and a gas supply component are provided, sequentially from a gas tank side, in a gas supply flow channel that extends from the gas tank to a gas consuming component. Besides, a buffer tank is provided, via an on-off valve, in a branch flow channel that branches off from the gas supply flow channel between the pressure reducing valve and the gas supply component. This buffer tank is in a situation where the pressure of the buffer tank is not higher than a consumption prescribed gas pressure. In calibrating the first gas pressure sensor, with the shutoff valve closed and with the on-off valve open, a detection value of the first gas pressure sensor is calibrated through the use of a detection value of the second gas pressure sensor.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: February 15, 2022
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keisuke Fujita
  • Patent number: 11245123
    Abstract: A shutdown control method of a fuel cell is provided. The method includes applying power to a controller in a shutdown state and determining, by the controller to which the power is applied, a possibility of moisture freezing based on an estimated outdoor temperature or the temperature of a fuel cell stack. A shutdown of the fuel cell is executed by performing moisture removal from the fuel cell stack in response to determining the possibility of moisture freezing after restart.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: February 8, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sung Ho Yang, Jae Hun Jang, Sung Mun Cho, Kang Sik Jeon
  • Patent number: 11239480
    Abstract: A fuel cell system includes: a fuel cell unit; first and second supply systems; a switching device; a switching control unit, when required power of the fuel cell unit is equal to or smaller than a threshold; an open circuit voltage obtaining unit; and a supply system control unit.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: February 1, 2022
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masayuki Ito, Tomohiko Kaneko, Hideyuki Kumei
  • Patent number: 11228049
    Abstract: A method of measuring impedance of a fuel cell stack in a vehicle during driving of the vehicle includes: determining whether an impedance measurement of the fuel cell stack is requested during driving of the vehicle driven by power of the fuel cell stack; turning off a first relay connected between the fuel cell stack and a battery charged by the fuel cell stack when the impedance measurement of the fuel cell stack is requested; connecting a stack load to the fuel cell stack via a second relay and supplying air to the fuel cell stack; and measuring the impedance of the fuel cell stack.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: January 18, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Gun Hyung Park
  • Patent number: 11217799
    Abstract: The invention relates to a cooling system (10) for fuel cell stacks (22, 26), comprising a first cooling module (14) and a second cooling module (18). The first cooling module (14) comprises a fuel cell stack (22, 26), a supply line connection (30, 34) for connecting a supply line (38, 42) for supplying coolant to the fuel cell stack (22, 26), a discharge line connection (46, 50) for connecting a discharge line (54, 58) for discharging coolant from the fuel cell stack (22, 26), and a venting line connection (94, 98) for connecting a venting line (102, 106).
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: January 4, 2022
    Assignees: Nikola Corporation, Robert Bosch GmbH
    Inventors: Kevin Lynk, Jesse Schneider, Werner Belschner, Jorg Heyse, Markus Remlinger
  • Patent number: 11214122
    Abstract: An conditioning device for a fuel cell vehicle includes a heater core configured to heat air in a vehicle cabin with a coolant to be discharged from a FC stack cooled by the coolant as a heat source, a coolant heating heater configured to heat the coolant, an air heating heater configured to further heat air warmed by the heater core, and a vehicle ECU configured to, in a case where a heater core outlet coolant temperature based on a target blowing temperature is equal to or higher than an FC stack inlet target temperature, perform control such that the air heating heater is operated with an output set based on the heater core outlet coolant temperature, and the coolant heating heater is operated with an output set based on a heater core inlet target coolant temperature calculated according to the set output of the air heating heater.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: January 4, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryo Oshima
  • Patent number: 11183699
    Abstract: A temperature sensor of a fuel cell system detects, as a start-up time temperature, the temperature of a fuel cell stack or the outside temperature at the time of starting operation. A memory stores a plurality of current limitation patterns. A current limiting unit selects a current limitation pattern based on the detected start-up time temperature, and limits electrical current collected from the fuel cell stack based on the selected current limitation pattern and the temperature during operation of the fuel cell stack detected by the temperature sensor. A threshold value for a period until the temperature of the fuel cell stack reaches a reference temperature is set to be smaller as the start-up time temperature at which the current limitation pattern is selected from the plurality of current limitation patterns becomes lower.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: November 23, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Satoshi Tanimoto, Go Kikuchi, Joji Nakashima
  • Patent number: 11165075
    Abstract: A fuel cell system includes a polymer electrolyte fuel cell that generates electric power using fuel gas and oxidant gas, a fuel gas supply path through which the fuel gas is supplied to an anode inlet of the fuel cell, a recycle gas path through which anode off-gas discharged from an anode outlet of the fuel cell returns to the fuel gas supply path, a pressure booster that is arranged in the fuel gas supply path between a confluence portion and the anode inlet, the fuel gas supply path and the recycle gas path meeting each other in the confluence portion, and a discharge path through which an impurity mixed into the anode off-gas is discharged outside.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: November 2, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takehiko Ise, Junji Morita, Yoshito Usuki
  • Patent number: 11145882
    Abstract: A fuel cell system includes: a fuel cell unit; first and second supply systems; a switching device; a switching control unit; an open circuit voltage obtaining unit; and a supply system control unit.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: October 12, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masayuki Ito, Hideyuki Kumei, Tomohiko Kaneko
  • Patent number: 11145879
    Abstract: A water content estimation method includes: measuring, by a temperature sensor, the temperature of coolant for cooling a fuel cell stack; calculating, by a water content calculator, a current heat capacity of the fuel cell stack based on the measured temperature of coolant; and estimating, by the water content calculator, a water content of the fuel cell stack based on the calculated current heat capacity of the fuel cell stack.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 12, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Jung Hwan Ryu
  • Patent number: 11139489
    Abstract: A system regulating pressure of a reactor for hightemperature electrolysis or co-electrolysis (HTE) or to an SOFC fuel-cell stack operating under pressure. The operation of the system includes: regulating upstream of one of the chambers, a flow rate of moisture-containing gas DH to guarantee electrochemical stability of a preset operating point; and controlling pressure by virtue of valves arranged downstream of the stack, for regulating gases including the moisture-containing gas, and which are generally hot.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: October 5, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Andre Chatroux, Georges Gousseau
  • Patent number: 11133515
    Abstract: A fuel cell system has a battery, a gas supply portion, a temperature acquisition portion configured to acquire a presumed temperature that is presumed to reach during the operation stop of the fuel cell; and a scavenging controlling portion. When it is determined that the presumed temperature is a predetermined temperature or more at the time of the operation stop of the fuel cell, the scavenging controlling portion performs the stop-time scavenging operation with a first scavenging ability; and when it is determined that the presumed temperature is less than the predetermined temperature, the scavenging controlling portion performs the stop-time scavenging operation with a second scavenging ability higher than the first scavenging ability.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: September 28, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiro Ogawa, Hiroyuki Imanishi, Yohei Okamoto
  • Patent number: 11133517
    Abstract: A system for maintaining insulation resistance of a fuel cell includes a fuel cell stack, a coolant line that allows coolant to pass through the fuel cell stack, a circulation pump that circulates the coolant in the coolant line, a deionizer that removes impurities or ions from the coolant in the coolant line, and a controller configured to measure the insulation resistance of a high-voltage terminal connected to the fuel cell stack, to determine whether recovery control is necessary based on the measured insulation resistance, and upon determining that recovery control is necessary, to control the circulation pump so as to change the flow of the coolant passing through the deionizer.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: September 28, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Hyun Hie Kim
  • Patent number: 11127961
    Abstract: The inspection method for a fuel cell stack including a plurality of unit cells comprises: (a) operating a fuel cell system, including the fuel cell stack and an anode gas circulation flow path that is connected between an anode gas discharge port and an anode gas supply port of the fuel cell stack to circulate anode gas, under a predetermined liquid water accumulation condition to accumulate liquid water in the anode gas circulation flow path; (b) causing, after the step (a), the fuel cell system to stop and stand by until a predetermined restarting condition is satisfied; and (c) restarting, after the step (b), the fuel cell system to implement power generation by the fuel cell stack, and measuring voltage of each of the unit cells to detect a unit cell having negative voltage.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 21, 2021
    Assignee: Toyota Jidosha Kabushishi Kaisha
    Inventor: Manabu Takahashi
  • Patent number: 11127960
    Abstract: A processing method for a fuel cell system including a fuel cell stack configured to generate electric power when supplied with an anode gas and a cathode gas is started in a state in which the fuel cell stack is not supplied with the anode gas and the cathode gas and generation of electric power in the fuel cell stack is stopped. The processing method includes: a first process of starting supply of the cathode gas; a second process of starting supply of an inert gas to an anode when a voltage of the fuel cell stack increases and then becomes equal to or less than a predetermined first voltage; and a third process of stopping the supply of the inert gas when the voltage of the fuel cell stack increases and then becomes equal to or less than a predetermined second voltage after the second process.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: September 21, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Michito Norimoto
  • 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: 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: 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: 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