Voltage Patents (Class 429/432)
  • Patent number: 11139494
    Abstract: A controller of a fuel cell system performs cathode gas supply control to raise an average cell voltage of a fuel cell stack by increasing supply of cathode gas to the fuel cell stack, when electric power required to be generated by the fuel cell stack is equal to zero, and the average cell voltage is lower than a predetermined target voltage. Under the cathode gas supply control, the controller sets the target voltage when a predetermined condition indicating that crossleak is likely to occur is satisfied, to a value higher than a reference target voltage as the target voltage in the case where the condition is not satisfied.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: October 5, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryoichi Namba, Tomotaka Ishikawa, Yoshikatsu Fujimura
  • Patent number: 11139496
    Abstract: A fuel cell system includes a first fuel cell, second fuel cell, first voltage detector, second voltage detector, and controller. The first voltage detector detects voltage of first unit cells of the first fuel cell for every “N” unit cells on average, and the second voltage detector detects voltage of the second fuel cell as a whole, or detects voltage of second unit cells of the second fuel cell for every “M” unit cells on average, where “M” is larger than “N”. The controller determines whether any of the second unit cells is in a fuel deficiency state, based on the detection result of the first voltage detector, when a predetermined condition under which states of the first fuel cell and the second fuel cell are regarded as being close to each other is satisfied.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: October 5, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masayuki Itou, Yasushi Araki
  • Patent number: 11127959
    Abstract: A valve is disposed in a reactant gas system apparatus of a fuel cell system. The valve includes a housing having an internal channel as a passage of water, and heaters in the form of rods inserted into the housing. An orifice having a small channel cross sectional area is provided at a predetermined position of the channel. The heaters are inclined from a solenoid of the valve in an axial direction of the housing, and front ends of the heaters are positioned close to the orifice.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: September 21, 2021
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryoichi Yoshitomi, Tetsuya Fukuda
  • Patent number: 11097621
    Abstract: In a power source system, a high-voltage battery and a low voltage battery are configured to store electric powers to be supplied to a traveling motor and an accessory, respectively. A step-up unit is interposed between the low-voltage battery and the traveling motor, and is configured to step up a voltage of the low-voltage battery and apply the stepped-up voltage to the traveling motor. A controller is configured to perform switching to a normal-time electric power supply circuit, in which the high-voltage battery and the traveling motor are coupled to each other, when the high-voltage battery is in a normal state and perform switching to an abnormal-time electric power supply circuit, in which the low-voltage battery and the traveling motor are coupled to each other via the step-up unit, when the high-voltage battery is in an abnormal state.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: August 24, 2021
    Assignee: SUBARU CORPORATION
    Inventors: Shinichiro Masaki, Takashi Inoue
  • Patent number: 11088377
    Abstract: A method for operating a fuel cell system includes delivering an oxidant to at least one fuel cell by at least one oxidant delivery device where the stoichiometric ratio of the oxidant is modified on the basis of the delivery rate of the oxidant delivery device.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: August 10, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Volker Formanski, Maximilian Zettl
  • Patent number: 11063266
    Abstract: A connector is moved obliquely to a first separator. An optical distance measuring device is used to optically measure an attachment position of the connector while using the first separator as a reference. A reference plane of the first separator is used as a reference. An inspection plane of the connector is also used as a reference. The inspection plane is formed to be parallel to the reference plane in the state that the connector is accurately attached to an attachment portion.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: July 13, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masahiro Imanishi
  • Patent number: 11056701
    Abstract: A fuel cell system, including: an electric power generation control unit; an insulation-resistance measurement signal generation unit configured to generate a voltage-divided AC signal obtained by dividing an amplitude of a measurement AC signal; and an insulation resistance measurement unit configured to measure a resistance value of the insulation resistance, in which when the insulation resistance measurement unit detects, in a state where a voltage is maintained during an intermittent operation of the electric power generation control unit, an excessive noise state indicating a change in which a range of fluctuations of the peak value of the voltage-divided AC signal exceeds a predetermined allowable range of fluctuations, the insulation resistance measurement unit instructs the electric power generation control unit to change a fluctuation frequency of an output voltage of the fuel cell from a current frequency and then measures the resistance value of the insulation resistance.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: July 6, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keiichi Toriumi, Shunsuke Kawakami
  • Patent number: 11031608
    Abstract: A connecting element for making electrical contact with at least one separator plate of a fuel cell stack includes a housing and a contact element which is arranged in the housing and has a contact end for making contact with the separator plate and has a connection end for connection to a continuing line. A positive z-direction is defined from the contact end in the direction of the connection end. A cutout is provided in the housing, wherein the contact element is positioned in the cutout. The contact end is arranged on a first side of the cutout. The connection end is arranged on the second side of the cutout. The contact element has an interlocking element which bears in an interlocking manner against the housing on the first side of the cutout.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: June 8, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Haase, Florian Kriesch
  • Patent number: 11018357
    Abstract: A fuel cell system includes: a fuel cell in which a plurality of cells are stacked; a voltage sensor configured to measure a cell voltage of the fuel cell; and a pressure sensor configured to measure an anode gas pressure in the fuel cell. When the cell voltage is lower than a predetermined threshold voltage, in a state in which an amount of supply of cathode gas to the fuel cell is secured, and a rate of decrease in the anode gas pressure is larger than a predetermined threshold rate, it is determined that a cross leak abnormality has occurred in the fuel cell.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: May 25, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tornio Yamanaka, Kenji Umayahara
  • Patent number: 10981471
    Abstract: A fuel cell system includes: a fuel cell outputting generated power to an external load; a secondary battery outputting charged power to the external load; and a controller performing a first control that controls output power of the fuel cell and output power of the secondary battery such that the output power of the secondary battery has a ratio predetermined in accordance with an output demand from the external load, in the power supplied to the external load, the controller switches the first control to a second control when the output demand satisfies a predetermined condition with which the output power of the secondary battery is predicted to reach a limit value with the first control, the second control sets a target value of the output power of the fuel cell such that the output power of the secondary battery is smaller than that in the first control.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: April 20, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshiaki Tsuruta
  • Patent number: 10971747
    Abstract: A fuel cell system that includes a first fuel cell that generates electric power using a hydrogen-containing fuel gas; a second fuel cell that generates electric power using off-gas exhausted from the first fuel cell and containing hydrogen that has not reacted in the first fuel cell; a first control device that controls the electric power output from the first fuel cell by adjusting a current or a voltage being output from the first fuel cell; a second control device that controls the electric power output from the second fuel cell by adjusting a current or a voltage being output from the second fuel cell; and an output control device that controls at least one of the first control device or the second control device such that a total electric power being generated by the first fuel cell and the second fuel cell approaches an electric power demand.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: April 6, 2021
    Assignee: TOKYO GAS CO., LTD.
    Inventors: Tatsuya Nakajima, Shumpei Taku, Kazuki Isshiki
  • Patent number: 10971742
    Abstract: In a fuel cell state determination method for determining an internal state of a fuel cell supplied with an anode gas and a cathode gas to generate electricity, a decrease of a reaction resistance value of the cathode caused by hydrogen evolution reaction generated in the cathode as the fuel cell has an oxygen deficiency state is detected, and the oxygen deficiency state is determined on the basis of detection of the decrease of the reaction resistance value.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: April 6, 2021
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Tetsuya Aoki
  • Patent number: 10960775
    Abstract: The two DC/DC converters perform DC/DC conversion of the power source voltage of the driving battery for supplying power to the motor of the vehicle and supply to an automatic operation load and a general load as an electrical component mounted on the vehicle. A switch is connected between the outputs of the two DC/DC converters. The two DC/DC converters and the switch are accommodated in one accommodating case.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: March 30, 2021
    Assignee: YAZAKI CORPORATION
    Inventor: Shuuji Satake
  • Patent number: 10923738
    Abstract: A coolant injection controller for a fuel cell system, the coolant injection controller configured to actively control the flow of a coolant to a fuel cell assembly for cooling and/or hydrating the fuel cell assembly in response to a measure of fuel cell assembly performance, wherein the coolant injection controller is configured to provide for a first mode of operation if the measure of fuel cell assembly performance is below a predetermined threshold and a second mode of operation if the measure of fuel cell assembly performance is above the predetermined threshold, the first and second modes having different coolant injection profiles and wherein, in the first mode of operation, the coolant injection profile provides for control of the flow of coolant by alternating between at least two different injection flow rates.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: February 16, 2021
    Assignee: Intelligent Energy Limited
    Inventors: Shahin Moghimi, Vince Gardner, Nathaniel Palmer, Simon Foster, Pratap Rama
  • Patent number: 10910659
    Abstract: A method and system for diagnosing a state of fuel cell are provided. The system includes a signal measurement unit that has a high pass filter with a predetermined cut-off frequency and a voltage measurement circuit, and that measures a first AC voltage to measure the fuel cell state diagnosis signal and a noise measurement unit including a band pass filter that has a predetermined pass band and a voltage measurement circuit, and that measures a second AC voltage to measure the fuel cell state diagnosis noise. A controller calculates a signal to noise ratio (SNR) of fuel cell state diagnosis data based on the first and second AC voltages, determines the corresponding fuel cell state diagnosis data to be reliable when the SNR value is greater than a predetermined reference value, and applies the fuel cell state diagnosis data to a control of a fuel cell vehicle.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: February 2, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sangbok Won, Young Bum Kum, Kwi Seong Jeong
  • Patent number: 10882406
    Abstract: A control device is configured to control a first boost converter and a second boost converter. The control device is configured such that, when a prescribed state where an output of the second boost converter cannot be made at a ratio of an output voltage to an input voltage in the second boost converter to be equal to or more than a predetermined value is detected, the control device calculates a target output voltage of a fuel cell by using an voltage on an input side or an output side of the second boost converter measured by a measuring portion and a first value which is equal to or larger than a minimum boost ratio of the first boost converter, and controls the fuel cell so that an output voltage of the fuel cell is equal to or lower than the target output voltage.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: January 5, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryosuke Oya
  • Patent number: 10886557
    Abstract: An opening is formed in an accommodating case of a fuel cell stack. Flat cables are led out of the accommodating case through the opening. The flat cables pass through a grommet covering the opening. The grommet is positioned by a seal plate (positioning member) attached to the accommodating case.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: January 5, 2021
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masahiko Sato, Takanori Mori
  • Patent number: 10855076
    Abstract: A method for operating a domestic energy generation installation comprises ascertaining or prespecifying at least one expectation time period, ascertaining an expected load profile of an electrical consumer, ascertaining an expected yield profile of the regenerative energy source in the expectation time period, ascertaining or prespecifying a minimum consumption power which should be available for withdrawal from the storage battery unit, ascertaining an energy balance over one expectation time period from the expected yield profile and the expected load profile, ascertaining a time range of the storage battery unit from the expected load profile, the expected yield profile and the minimum consumption power, which should not be undershot at any time, and from a currently ascertained state of charge of the storage battery unit, operating the fuel cell unit depending on the ascertained time range and operating the electrolysis unit depending on the ascertained energy balance.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: December 1, 2020
    Assignee: HPS HOME POWER SOLUTIONS GMBH
    Inventors: Andreas Hierl, Dirk Radue, Gunnar Schneider, Uwe Benz, Kevin Schroder, Zeyad Abul-Ella
  • Patent number: 10854901
    Abstract: A fuel cell assembly according to an exemplary aspect of the present disclosure includes, among other things, a first fuel cell stack in series with a variable resistor and a second fuel cell stack in parallel with the first fuel cell stack and in series with a contactor. A resistance level of the variable resistor is adjusted in response to deactivating the contactor. A method of regulating a fuel cell assembly is also disclosed.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: December 1, 2020
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Jonathan Daniel O'Neill
  • Patent number: 10850632
    Abstract: A power supply system for a vehicle includes: a main power supply; an electric power converter including a capacitor; a relay; a sub power supply; a boost converter; a cooler; and a controller configured to cause the sub power supply and the boost converter to precharge the capacitor, when a main switch of the vehicle is turned on and before the relay is closed to connect the electric power converter to the main power supply. The controller is configured to perform one of a control i) and a control ii) when one of a temperature of the boost converter and a temperature of a coolant in the cooler is higher than a specified temperature threshold. The control i) being a control to start the precharging while starting up the cooler. The control ii) being a control to start up the cooler before the precharging.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: December 1, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiromichi Senba
  • Patent number: 10840528
    Abstract: A method and apparatus for detecting oxidation in at least one planar fuel cell stack that includes a multitude of cells is described. The height of the stack is measured to determine if there has been an increase from a previously-measured height. Such an increase correlates with the oxidation of at least some of the planar cells. In some cases, the fuel flow rate or airflow rate to each fuel cell stack can be adjusted, based in part on the oxidation detection technique. A power delivery system with at least two fuel cell stacks is also described, and it includes a stack height-measurement system, a health monitor for the fuel cell stacks, and a load balancer or airflow regulator.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 17, 2020
    Assignee: CUMMINS ENTERPRISE LLC
    Inventors: Darren Bawden Hickey, Honggang Wang
  • Patent number: 10818935
    Abstract: A connector is moved obliquely to a first separator. An optical distance measuring device is used to optically measure an attachment position of the connector while using the first separator as a reference. A reference plane of the first separator is used as a reference. An inspection plane of the connector is also used as a reference. The inspection plane is formed to be parallel to the reference plane in the state that the connector is accurately attached to an attachment portion.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: October 27, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masahiro Imanishi
  • Patent number: 10811700
    Abstract: A first metal separator of a power generation cell includes an oxygen-containing gas supply passage extending through the first metal separator in a separator thickness direction, a passage bead formed around the oxygen-containing gas supply passage, and a plurality of tunnels protruding from a side wall of the passage bead and expanded in the separator thickness direction. The plurality of tunnels have the same shape in cross section of a root connected to the passage bead.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: October 20, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yu Tomana, Kentaro Ishida, Satoshi Oyama
  • Patent number: 10790519
    Abstract: Solid oxide fuel cell stacks and methods of sealing a planar solid oxide fuel cell. Unit cells within the stack each include a metal frame with a periphery that can both provide a support surface for a membrane electrode assembly, as well as form a fluid-tight seal with a bonded separator plate. The separator plate includes a peripheral lip that bounds a cell-receiving cavity such that a volumetric region is formed within the separator plate to receive at least a portion of the membrane electrode assembly to create a fluid-tight pathway for at least one of the reactants that is being introduced to a corresponding anode layer or cathode layer of the membrane electrode assembly.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: September 29, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Sai P. Katikaneni, Inyong Kang, Jinwoo Park, Hyundal Song, Hyunbae Park, Byungwook Park
  • Patent number: 10784526
    Abstract: A fuel cell vehicle is configured such that at least a part of an underfloor of a vehicle body is formed to have a shape causing a downforce to the vehicle body by wind passing below the underfloor, and an exhaust port via which exhaust gas from a cathode-side passage of a fuel cell is discharged is disposed in a negative pressure region where a negative pressure is caused by the shape causing the downforce. A magnitude of the negative pressure to be caused by the shape is detected or estimated, so that a driving amount of an air supply configured to supply air to the fuel cell is controlled according to the magnitude of the negative pressure thus detected or estimated.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: September 22, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keitaro Yamamori
  • Patent number: 10756369
    Abstract: Disclosed is a fuel cell system that stops producing electricity and exhausts residual electricity in an emergency situation. The fuel cell system includes a stack receiving a reactive gas including a hydrogen and/or an oxygen to produce the electricity, a pump supplying the reactive gas to the stack, a discharge circuit including a resistor that discharges a residual power in the stack and a first relay that electrically connects or disconnects the resistor to or from the stack, a generator connected to a rotational shaft of the pump to convert a driving energy of the rotational shaft of the pump to an electric energy, and a first controller controlling the first relay. The first controller receives the electric energy from the generator and controls the first relay to electrically connect the stack and the resistor such that the residual electricity in the stack is exhausted in the emergency situation.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: August 25, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Nam Woo Lee
  • Patent number: 10744903
    Abstract: Provided is a method for controlling a fuel cell vehicle capable of informing a user outside of the vehicle of the possibility that the fuel cell stops power generation and external power-feeding stops, whereby problems due to unexpected stopping of power feeding can be avoided. In a method for controlling a fuel cell vehicle 100 including an external power-feeding device 50, when it is determined that a state of a fuel cell exceeds a limiting point where deterioration of the fuel cell 20 or a failure of a driving device to supply fuel to the fuel cell 20 occurs during external power feeding, warning is issued to outside of the vehicle 10 before the fuel cell 20 stops power generation.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 18, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yohei Okamoto, Hiroyuki Imanishi, Mitsuhiro Nada, Takashi Yamada
  • Patent number: 10734662
    Abstract: A controller of a fuel cell system, when the fuel cell system is started up and thrown into warming-up operation, sets a rotating speed of the circulation pump to a reference rotating speed, subsequently repeatedly performs: (a) a process of acquiring the first temperature and the second temperature; and (b) a process of controlling the circulation pump by setting the rotating speed of the circulation pump in order that with the first temperature is within a predetermined temperature range, the rotating speed is made generally higher than the reference rotating speed with increasing temperature difference between the first temperature and the second temperature, and when a condition for rotating the circulation pump at the reference rotating speed is satisfied, the controller sets the rotating speed of the circulation pump to the reference rotating speed.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: August 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Fusaki Igarashi
  • Patent number: 10693160
    Abstract: A fuel cell system includes a fuel cell stack, a compressor that supplies cathode gas to the fuel cell stack, and a controller that controls constituent components of the fuel cell system including the compressor. The controller controls the compressor, such that a supply period in which the compressor supplies the cathode gas and a stop period in which supply of the cathode gas is stopped appear alternately, when the fuel cell stack is not required to generate electric power, and the supply period is longer than the stop period, and such that the flow rate of the cathode gas supplied by the compressor in the supply period is smaller than the flow rate in the case where the fuel cell stack is required to generate electric power.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: June 23, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryoichi Namba, Tomotaka Ishikawa
  • Patent number: 10661221
    Abstract: An apparatus includes a proton-conducting electrolyte membrane, an anode, a cathode, a first flow path which is disposed on the anode and through which an anode fluid containing hydrogen as a constituent element flows, a second flow path which is disposed on the cathode and through which hydrogen flows, a voltage applicator, a detector which detects a hydrogen cross leak amount passing through the membrane, where the detector detects the hydrogen cross leak amount from, a natural potential of one electrode of the cathode and the anode after forming a state where hydrogen is present at the one electrode and hydrogen is not present at the other electrode of the cathode and the anode, or a current flowing between the anode and the cathode when the voltage is applied from the voltage applicator in a state where the first flow path and the second flow path are both sealed off.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: May 26, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hidenobu Wakita, Yasuhiko Itoh, Yusuke Fujita
  • Patent number: 10637081
    Abstract: A recirculation fuel cell device, which can be utilized on a submarine, may include a fuel cell with an anode side and a cathode side, wherein both the anode and cathode sides have input and output sides. The device may include a first inlet for oxygen and a second inlet for hydrogen. The device may further include a cathode-side connection between the output side of the cathode side and the input side of the cathode side, and an anode-side connection between the output side of the anode side and the input side of the anode side. A water separator may be disposed in the cathode-side connection, and a gas discharge valve for a continuous release of process gases may be disposed on the output side of the cathode side of the fuel cell. Operation of the device may involve recirculating an anode gas stream in its entirety.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: April 28, 2020
    Assignees: THYSSENKRUPP MARINE SYSTEMS GMBH, THYSSENKRUPP AG
    Inventors: Stefan Krummrich, Hans Pommer
  • Patent number: 10629927
    Abstract: There is provided a fuel cell system, wherein a controller configured to set the flow volume of a fluid in an anode flow path at an outlet of an anode of the fuel cell to a first flow volume, then set thereafter the flow volume of the fluid in the anode flow path at the outlet of the anode to a second flow volume which is smaller than the first flow volume, and discharge the water in the hydrogen discharge flow path by opening an exhaust and drain valve while the fluid is flowing at the second flow volume.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masashi Toida, Yoshiaki Naganuma, Tomohiro Ogawa
  • Patent number: 10611256
    Abstract: The present invention provides a method for controlling a charging voltage of a 12V auxiliary battery for a hybrid vehicle, which can (1) improve charging efficiency of an auxiliary battery by increasing the output voltage of a DC-DC converter during cold start when the outside air temperature is low, (2) improve the charging efficiency of the auxiliary battery by increasing or decreasing the output power of the DC-DC converter according to the state of charge of the auxiliary battery and by increasing the output voltage of the DC-DC converter when many electrical loads are turned on, and (3) allow the DC-DC converter to provide continuous power supply for charging the auxiliary battery by turning on a main switch disposed between a high voltage battery and the DC-DC converter based on a reverse power conversion operation of the DC-DC converter even in the case where the voltage of the auxiliary battery falls below 9V.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: April 7, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Hong Seok Song
  • Patent number: 10608266
    Abstract: A system and method of controlling a start of a fuel cell are provdied. The method includes comparing a derived internal temperature of a stack and a predetermined reference temperature value and determining whether the internal temperature of the stack is less than the reference temperature value when an ON signal of the start of the fuel cell is received. A required heat value is then derived using the internal temperature of the stack when the derived internal temperature of the stack is less than the reference temperature value. A temperature of the stack of the fuel cell is increased until a cumulative heat value caused by a temperature increase of the stack of the fuel cell is equal to the required heat value.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: March 31, 2020
    Assignee: Hyundai Motor Company
    Inventor: Dae Jong Kim
  • Patent number: 10581100
    Abstract: A method of operating a fuel cell stack is described. The fuel cell stack includes a cathode, an anode, and a temporarily disabled bleed valve that is otherwise configured to transition from a first position to a second position and thereby modulate nitrogen drained from the anode. The method includes increasing a first pressure in the anode via a controller and, concurrent to increasing, decreasing a second pressure in the cathode via the controller. A system and a device including the fuel cell stack are also described.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: March 3, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Manish Sinha, Chad Dubois, Xiaofeng Wang, Sergio E. Garcia
  • Patent number: 10573908
    Abstract: A fuel cell system used in a vehicle equipped with a fuel cell includes: a fuel cell; a fuel gas supply portion which supplies a fuel gas to the fuel cell; a fuel gas discharge portion which discharges exhaust fuel gas from the fuel cell; and a control unit, in which, when an operation of the fuel cell is ended, the control unit performs (a) an exhaust process of discharging the exhaust fuel gas of the fuel cell to reduce a pressure, and (b) a process of increasing a partial pressure of the fuel gas in the fuel cell by supplying the fuel gas to the fuel cell after the exhaust process.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: February 25, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Imanishi, Kazuo Yamamoto
  • Patent number: 10553886
    Abstract: The present disclosure is directed to a fuel cell system for generating oxygen depleted air. The fuel cell system may include a fuel cell having an anode, a cathode, and an electrolyte positioned between the anode and the cathode. The cathode may be configured to receive an air flow and discharge an oxygen depleted air flow. The fuel cell system may further include a sensor configured to generate a first signal indicative of a presence of hydrogen in the oxygen depleted air flow and a controller in communication with the sensor and the fuel cell. The controller may be configured to detect the presence of hydrogen in the oxygen depleted air flow based on the first signal, and in response to detecting the presence of hydrogen in the oxygen depleted air flow, selectively cause a current density of the fuel cell to decrease and/or increase a flow rate of the air flow to the cathode.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: February 4, 2020
    Assignee: Nuvera Fuel Cells, LLC
    Inventors: Steve Buelte, Pierre-François Quet
  • Patent number: 10529996
    Abstract: A plate includes a working face and a header portion. The working face defines a plurality of reactant channels thereon. The header portion is disposed in a peripheral area of the plate and includes a plurality of flanges and a plurality of beads. The flanges are disposed on the header portion and define a plurality of apertures through the plate. Each flange defines a respective one of the apertures. At least one of the apertures is fluidly connected to the reactant channels. The plurality of beads is disposed on the working face. Each bead is disposed about a respective one of the apertures and thereby defines a respective one of the flanges. Each bead defines a shape consisting of bead-corners and bead-sides. Each bead has a sealing surface thereon. The sealing surface is configured to deflect when exposed to a contact pressure to thereby provide a substantially fluid-tight seal.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: January 7, 2020
    Assignees: GM Global Technology Operations LLC, Honda Motor Co., Ltd.
    Inventors: Masaaki Sakano, Xi Yang, Liang Xi, Siguang Xu, Joseph N. Lovria, Jeffrey D. Williams, Yu Tomana, Kentaro Ishida
  • Patent number: 10522841
    Abstract: An electrochemical reactor block including at least two pellets cut out of a flexible conductive film including chains of a linear polymer, carbon nanotubes being bound to each of the chains by pi-pi interaction, a catalyst agent selected from the group including enzymes, metal catalysts, macrocyclic catalysts, and redox mediators being trapped between the pellets.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: December 31, 2019
    Assignee: UNIVERSITE GRENOBLE ALPES
    Inventors: Serge Cosnier, Raoudha Haddad
  • Patent number: 10522866
    Abstract: A fuel cell stack obtained by stacking a plurality of fuel cells has an internal manifold that extends in a stacking direction of the fuel cells to externally discharge a gas used in the fuel cell, and an extension member that adjoins an inner wall surface of the internal manifold and extends in the stacking direction. The extension member is a bar-shaped member provided in an opposite side to a side where a gas from the fuel cells flows to the inside of the internal manifold and has a sloping surface making an acute angle with an inner-wall lower surface of the internal manifold.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: December 31, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Daigo Iwasaki, Hidetaka Nishimura, Hayato Chikugo, Ryoichi Shimoi, Keiji Ichihara
  • Patent number: 10511038
    Abstract: An apparatus and method for controlling hydrogen purging are provided. The hydrogen purging control apparatus includes a purge valve that is disposed at an outlet on an anode side of a fuel cell stack and is configured to adjust an amount of emission of hydrogen containing impurities. Additionally, a controller is configured to adjust an opening and closing cycle of the purge valve based on a required output or an output current of the fuel cell stack.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: December 17, 2019
    Assignee: Hyundai Motor Company
    Inventors: Kyung Won Suh, Sang Uk Kwon, Kyu Il Lee
  • Patent number: 10505211
    Abstract: The invention relates to fuel cell unit arranged in an underfloor space of a fuel cell vehicle. The fuel cell unit includes a fuel cell that has a plurality of cells stacked together; and a cell monitor that is arranged in a side region of the fuel cell, and that monitors a state of each of the cells.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: December 10, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsutomu Shirakawa, Norishige Konno, Kazuya Mori
  • Patent number: 10479215
    Abstract: A fuel cell vehicle comprising: a hydrogen tank which is mounted on the vehicle so as to have a center axis generally parallel to a front/rear direction of the vehicle; a high-voltage electric component which is positioned either forward or rearward of the hydrogen tank and which operates on high voltage; an aftercooler placed between the hydrogen tank and the high-voltage electric component to cool compressed air; and a fuel cell stack which is supplied with the cooled compressed air.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: November 19, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tetsuji Aishima
  • Patent number: 10483570
    Abstract: A fuel cell has a stack that includes a fuel electrode and air electrode on opposite sides of an electrolyte membrane. The fuel electrode includes first and second fuel ports communicative via a fuel flow path, and the air electrode includes first and second air ports communicative via an air flow path. The fuel cell also includes first and second fuel feeders communicative with the first and second fuel ports, and first and second air feeders communicative with the first and second air ports. The fuel cell also includes a fuel switching unit between the first and second fuel feeders that switches a fuel supply direction between the first and second fuel feeders. The fuel cell further includes an air switching unit between the first and second air feeders that switches an air supply direction between the first and second air feeders.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: November 19, 2019
    Assignee: LG Electronics Inc.
    Inventors: Choonjae Ryu, Dongkeun Yang, Hyoungsuk Woo
  • Patent number: 10396376
    Abstract: A fuel cell vehicle control method changes an output current of a fuel cell depending on a required generated power and adjusts an air supply flow rate depending on the change of the output current. The output current is reduced in response to a decrease of the required generated power when a gearshift operation of a transmission is under an inertia phase of an upshift operation. The air supply flow rate is controlled to an inertia phase supply flow rate higher than the air supply flow rate set in response to the decrease of the output current.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: August 27, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hideaki Setoguchi, Mitsunori Kumada
  • Patent number: 10312536
    Abstract: An onboard electrochemical system of an electrochemical cell including a cathode and an anode separated by an electrolyte separator is selectively operated in either of two modes. In a first mode of operation, water or air is directed to the anode, electric power is provided to the anode and cathode to provide a voltage difference between the anode and the cathode, and nitrogen-enriched air is directed from the cathode to an aircraft fuel tank or aircraft fire suppression system. In a second mode of operation, fuel is directed to the anode, electric power is directed from the anode and cathode to one or more aircraft electric power-consuming systems or components, and nitrogen-enriched air is directed from the cathode to a fuel tank or fire suppression system.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: June 4, 2019
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Jonathan Rheaume
  • Patent number: 10305129
    Abstract: A fuel battery system includes a fuel battery, an electric storage, a voltage adjuster, a pump, an abnormity detector, and circuitry. The fuel battery generates electricity using fuel gas and oxidant gas. The voltage adjuster is connected to at least one of the fuel battery and the electric storage. The voltage adjuster is configured to adjust voltage output from the fuel battery or the electric storage to output the adjusted voltage to a load. The pump supplies the oxidant gas to the fuel battery using electric power output from at least one of the fuel battery and the electric storage. The voltage adjuster is connected between the fuel battery and the pump. The abnormity detector detects abnormity in the voltage adjuster. The circuitry is configured to restrict the electric power supplied to the pump in a case where the abnormity detector detects the abnormity in the voltage adjuster.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: May 28, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yasutaka Sakai, Kuniaki Ojima, Masaaki Komatsu
  • Patent number: 10293807
    Abstract: A power control system for a hybrid vehicle is provided. The system includes a high-voltage battery that is capable of being charged or discharged, a first motor and a second motor, a first inverter connected to the first motor, and a second inverter connected to the second motor. Additionally, a converter has a first side connected to the battery and a second side connected in parallel to the first inverter and the second inverter and a diode is connected in parallel to both sides of the converter. A controller is configured to operate the converter and the first and second inverters to cause electric power of the high-voltage battery to be bypassed via the diode and directly supplied to the first inverter or the second inverter.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 21, 2019
    Assignee: Hyundai Motor Company
    Inventors: Su Hyun Bae, Hong Geuk Park, Sung Kyu Kim, Mu Shin Kwak
  • Patent number: 10279702
    Abstract: A technique of diagnosing a fuel cell stack is provided. In particular, current and voltage of a fuel cell stack are measured during driving of a fuel cell vehicle and the current and voltage are sequentially stored. It is then determined based on the stored current whether the vehicle is being operated at constant current. Different factors are analyzed depending on whether the vehicle is being operated at constant current, and then it is determined whether the fuel cell stack is in a normal state. A moisture supply into the fuel cell stack is calculated if it is determined that the fuel cell stack is not in the normal state. Based on the calculated moisture supply, whether the fuel cell stack is in a dryout state is diagnosed.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: May 7, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Ja Hoo Koo, Sung Jin Chung, Sang Uk Kwon
  • Patent number: 10276884
    Abstract: A method and system for diagnosing a state of fuel cell are provided. The system includes a signal measurement unit that has a high pass filter with a predetermined cut-off frequency and a voltage measurement circuit, and that measures a first AC voltage to measure the fuel cell state diagnosis signal and a noise measurement unit including a band pass filter that has a predetermined pass band and a voltage measurement circuit, and that measures a second AC voltage to measure the fuel cell state diagnosis noise. A controller calculates a signal to noise ratio (SNR) of fuel cell state diagnosis data based on the first and second AC voltages, determines the corresponding fuel cell state diagnosis data to be reliable when the SNR value is greater than a predetermined reference value, and applies the fuel cell state diagnosis data to a control of a fuel cell vehicle.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: April 30, 2019
    Assignee: Hyundai Motor Company
    Inventors: Sangbok Won, Young Bum Kum, Kwi Seong Jeong