Regulation Of Differential Pressure Patents (Class 429/446)
  • Patent number: 11322759
    Abstract: A system for estimating the amount of purge of a fuel cell is provided. The system includes a fuel cell that generates power by receiving hydrogen at an anode side and receives oxygen at a cathode side. A recirculation line is connected with the anode side of the fuel cell, and the gas included hydrogen therein is circulated in the recirculation line. A flow amount estimator estimates the flow amount of gas inside the recirculation line. A purge valve is positioned in the recirculation line and discharges the gas in the recirculation line to the outside when opened. A purge amount estimator estimates the amount of purge for each gas discharged through the purge valve by reflecting the flow amount of the gas estimated by the flow amount estimator.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: May 3, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Soon Woo Kwon, Ik Jae Son
  • Patent number: 11239478
    Abstract: A fuel cell system includes: a fuel cell including an inlet and an outlet; first and second injection devices injecting purge gas; a gas-liquid separator separating liquid water from the purge gas discharged from the outlet and causing the liquid water to flow out; a discharge valve discharging the liquid water flowing out to an outside; an ejector including: an inflow port and an outflow port for the purge gas; a first connection path between the outflow port and the inlet; an introduction path introducing the purge gas injected from the second injection device into the first connection path without flowing through the ejector; a second connection path between the gas-liquid separator and the outlet; a third connection path connected between the gas-liquid separator and the inflow port, and extending vertically upward from the gas-liquid separator; and a controller.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: February 1, 2022
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomoyuki Kozuka
  • Patent number: 11177490
    Abstract: A fuel cell system includes a nozzle for guiding a fuel gas injected from a first injector and a second injector to a diffuser. An injector control portion performs a first injection control mode when a fuel cell stack is in a first load state. When the fuel cell stack is in a second load state, the injector control portion switches between a second injection control mode and a third injection control mode depending on the circumstances.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: November 16, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuya Mizumoto, Koichi Kato, Yoichiro Saito
  • Patent number: 11088383
    Abstract: A fuel cell vehicle that reduces damage on a fuel gas pump and deformation of a dash panel toward a cabin side when the vehicle collides head-on. The fuel gas pump is secured to a stack frame via a bracket such that a rotation, axis line of a motor adapted to drive a fuel gas pump inclines with respect to a reference line along the from-rear direction of the vehicle in plan view of the vehicle. Two fastening members secure the stack frame to the bracket in a state of being respectively inserted through a through hole and a cutout portion formed at a mounting portion. The cutout portion is formed such that, when the bracket turns together with the fuel gas pump with respect to the stack frame using one fastening member as a rotational center, the other fastening member exits out of an opening of the cutout portion.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: August 10, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Kamiyama, Yoshihiro Kubota
  • Patent number: 11081713
    Abstract: A voltage is applied between an anode and a cathode in a fuel cell. The voltage is increased to a predetermined upper limit, and then decreased to a predetermined lower limit. The voltage increase and decrease are repeated a predetermined number of times. The voltage is applied to the fuel cell while supplying a hydrogen-containing gas to an anode and supplying an inert gas to a cathode.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: August 3, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shohei Toyota, Hiromichi Yoshida, Hayato Kaji
  • Patent number: 11063281
    Abstract: The invention relates to a fuel cell system (1) suitable for operation with a cathode operating gas containing oxygen and inert gas and an anode operating gas containing hydrogen and inert gas; an appliance system operated by means of the fuel cell system (1); and a method for operating the fuel cell system (1). In the method according to the invention, the single components of the operating gases are stored separately, and mixed to the required portions during operation of the fuel cell system, thereby constantly recirculating the inert portion of the operating gases. During operation of the fuel cell system, gases are neither taken in from the environment nor released into the environment nor are fuel cell exhaust gases stored in the fuel cell system or the appliance system. In an alternative variation, only the anode operating gas is mixed and recirculated, while the cathode operating gas and the cathode exhaust gas are taken from the environment and released into the environment, respectively.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: July 13, 2021
    Inventor: Quirin Meder
  • Patent number: 11031614
    Abstract: A fuel cell system includes a plurality of fuel cell stacks or columns, each fuel cell stack or column containing a plurality of fuel cells, and at least one pressure drop tool located in a fuel path of at least one first fuel cell stack or column but not in a fuel path of at least one second fuel cell stack or column.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: June 8, 2021
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Natarajan Ramanan, Martin Perry, Yashas Keshav, Michael Petrucha, Nilanjana Basu
  • Patent number: 11018345
    Abstract: A method and/or electrochemical cell for utilising one or more gas diffusion electrodes (GDEs) in an electrochemical cell, the one or more gas diffusion electrodes have a wetting pressure and/or a bubble point exceeding 0.2 bar. The one or more gas diffusion electrodes can be subjected to a pressure differential between a liquid side and a gas side. A pressure on the liquid side of the GDE over the gas side does not exceed the wetting pressure of the GDE during operation (in cases where a liquid electrolyte side has higher pressure), and/or a pressure on the gas side of the GDE over the liquid side, does not exceeds the bubble point of the GDE (in cases where the gas side has the higher pressure).
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: May 25, 2021
    Assignee: AQUAHYDREX, INC.
    Inventors: Gerhard Frederick Swiegers, Andrew Nattestad, Dennis Antiohos, Fletcher William Thompson, Stephen Thomas Beirne, Steven DuWayne Kloos, Paul Brendan Denis Michael Barrett
  • Patent number: 10926886
    Abstract: An aircraft fuel tank inerting system is disclosed. An aircraft fuel tank inerting system may include a paramagnetic pump arranged to apply a magnetic field to a source of gas to provide a motivational force for removing oxygen from said gas. A paramagnetic pump may include a series of magnetic field generating elements configured to provide a sequence of discrete spaced apart magnetic fields. The series of magnetic field generating elements may include a series of spaced apart pairs of magnetic field generating elements. Each spaced apart pair of magnetic field generating elements may be arranged to generate a respective spaced apart magnetic field, of the sequence of discrete spaced apart magnetic fields, across an airspace therebetween.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: February 23, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Shireesh Pankaj, Mahesh Prabhakar Joshi, Swarnim Gupta, Alan Ernest Massey
  • Patent number: 10916791
    Abstract: A fuel cell vehicle includes a front compartment and a metallic dash panel in a front side of the vehicle. The front compartment houses a fuel cell stack, a gas-liquid separator, and a fuel gas pump. The dash panel is disposed between the front compartment and a cabin to partition them. The fuel gas pump is mounted to a lower portion of a stack frame in a state of projecting from the stack frame toward the dash panel side. The gas-liquid separator is mounted to a lower portion of the fuel gas pump in a state of projecting from the stack frame and the fuel gas pump toward the dash panel side. The fuel gas pump is made of metal, and the gas-liquid separator is made of resin.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: February 9, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetuji Aisima, Tomoyuki Kozuka
  • Patent number: 10756363
    Abstract: A hydrogen circulation system for fuel cell includes a hydrogen supply pipeline, a return pipeline, a buffer tank, an ejector, a differential pressure valve, a solenoid valve, and a controller. The return pipeline connects a hydrogen outlet of a fuel cell stack and the hydrogen supply pipeline. The buffer tank is installed at the return pipeline. The ejector is installed at the hydrogen supply pipeline for connecting the buffer tank. The differential pressure valve is between a hydrogen source and the ejector for adjusting a pressure in the hydrogen supply pipeline based on a pressure difference between an anode inlet and a cathode inlet of the fuel cell stack. The solenoid valve is installed at the return pipeline between the buffer tank and the hydrogen outlet. According to an output voltage or a load of the fuel cell stack, a switch of the solenoid valve is controlled by the controller.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: August 25, 2020
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-han Li, Reiko Ohara, Jar-Lu Huang, Ya-Yi Hsu, Ming-Tao Hu
  • Patent number: 10714770
    Abstract: A fuel cell system comprises a fuel cell; a fuel cell controlling converter; an oxidizing gas supplier that is configured to supply an oxidizing gas to the fuel cell; and a controller that is configured to control a voltage and a current value of the fuel cell. In a first power generation state, the controller sets the voltage and the current value of the fuel cell according to a required output, based on a current-voltage characteristic of the fuel cell. In a second power generation state, the controller sets the voltage and the current value of the fuel cell according to the required output and a required amount of heat, to a voltage and a current value that provide a lower power generation efficiency than a power generation efficiency in the first power generation state. The controller reduces the required amount of heat in a process of changing over a power generation state from the second power generation state to the first power generation state.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: July 14, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiko Kaneko, Yoshiaki Naganuma
  • Patent number: 10559837
    Abstract: A fluid control valve is connected to a wet gas flow passage in order to control a flow of a wet gas, and includes an introduction passage for introducing the wet gas into the fluid control valve, a filter including mesh for removing foreign matter contained in the wet gas flowing through the introduction passage, a discharge passage that includes a valve port disposed above the introduction passage and discharges the wet gas that has passed through the filter from the fluid control valve through the valve port, and a valve portion that opens and closes the valve port using a valve body. In this fluid control valve, the filter is disposed in a lowermost portion of the introduction passage.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: February 11, 2020
    Assignees: NISSAN MOTOR CO., LTD., KABUSHIKI KAISHA SAGINOMIYA SEISAKUSHO
    Inventors: Takatada Usami, Tsuyoshi Takeda, Ichiro Okawara
  • Patent number: 10497955
    Abstract: A fuel cell system includes a supply valve for supplying an anode gas into an anode system, a purge valve for discharging an off-gas from the anode system, a pressure detecting portion configured to estimate or measures a pressure inside the anode system, a supply valve control portion configured to control an open/close operation of the supply valve based on a load of the fuel cell, a purge flow rate estimating portion configured to estimate a purge flow rate of the off-gas discharged from the anode system through the purge valve based on a pressure decrease inside the anode system in a supply valve close state, and a purge valve control portion configured to open the purge valve in synchronization with the supply valve close state.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 3, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Yoshitomo Asai
  • Patent number: 10388972
    Abstract: In order to improve estimation accuracy of a purging amount, a fuel cell system comprises a supply valve that controls a supply of an anode gas into an anode system, a purge valve that discharges an off-gas from the anode system, a pressure detecting unit configured to estimate or measures a pressure inside the anode system, and a purging amount estimating unit configured to estimate a purging amount of the off-gas discharged from the anode system through the purge valve based on a pressure change inside the anode system during a purge valve close duration in a supply valve open state and a pressure change inside the anode system during a purge valve close duration in a supply valve close state.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: August 20, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Yoshitomo Asai
  • Patent number: 10367214
    Abstract: A fuel cell system that supplies an anode gas and a cathode gas to a fuel cell to cause the fuel cell to generate an electricity. The fuel cell system includes a high pressure tank, an anode gas supply passage configured to supply the anode gas to the fuel cell from the high pressure tank, an anode pressure control valve disposed on the anode gas supply passage, the anode pressure control valve adjusting an anode gas pressure of the fuel cell, an anode gas valve disposed between the high pressure tank and the anode pressure control valve, the anode gas valve adjusting a source pressure of the anode pressure control valve, and a valve control unit configured to control to open and close the anode pressure control valve and the anode gas valve on the basis of an operating state of the fuel cell system.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: July 30, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi Takeda, Masashi Sato
  • Patent number: 10328819
    Abstract: A fuel cell system and method of controlling the fuel cell system are provided. The fuel cell system includes a fuel cell stack that is configured to receive fuel, and generate electric energy and a fuel supply valve that is configured to adjust pressure of fuel that is supplied to the fuel cell stack. A controller is configured to operate the fuel supply valve to supply fuel of predetermined target pressure to the fuel cell stack, using a difference between the predetermined target pressure and actual pressure of the fuel being supplied. When the actual pressure reaches a steady state from a transient state, the controller applies a smaller gain than in the transient state to determine a first controlled variable based on the difference between the target pressure and the actual pressure of the fuel being supplied.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: June 25, 2019
    Assignee: Hyundai Motor Company
    Inventors: GunHyung Park, JunYoung Park
  • Patent number: 10290880
    Abstract: A system and method for a cathode subsystem in a fuel cell system. The system includes a fuel cell stack, a cathode inlet line that provides cathode air to a fuel cell stack and a cathode exhaust line that exhausts a cathode exhaust gas out of the fuel cell stack. Also included is a backpressure valve in the cathode exhaust line that is located downstream of a drip rail of the cathode exhaust line, where the drip rail includes a protrusion that prevents condensed water from building up near the backpressure valve. The drip rail further includes a sump that collects drips of condensed water from the protrusion of the drip rail. The system also includes a drain below a water vapor transfer unit that includes an orifice that is in a portion of the drain that is within the cathode exhaust line.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: May 14, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Bruce J. Clingerman, Aaron Rogahn, Steven D. Burch, Michael Cartwright
  • Patent number: 10230139
    Abstract: A temperature control apparatus for an energy storage system, which includes a battery module, a temperature sensor and an HVAC system, includes a first communication unit configured to receive first temperature information indicating a temperature of the battery module from a battery management system combined with the battery module; a second communication unit configured to receive from the temperature sensor second temperature information indicating a temperature measured by the temperature sensor; and a control unit connected with the first communication unit and the second communication unit.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: March 12, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Hyun-Min Lee, Ji-Hun Kim, Young-Chang Jo, Suk-Chul Kim
  • Patent number: 10193168
    Abstract: A fuel cell system that generates electric power by supplying anode gas and cathode gas to a fuel cell includes a control valve adapted to control the pressure of the anode gas to be supplied to the fuel cell; a buffer unit adapted to store the anode-off gas to be discharged from the fuel cell; a pulsation operation unit adapted to control the control valve in order to periodically increase and decrease the pressure of the anode gas at a specific width of the pulsation; and a pulsation width correcting unit adapted to correct the width of the pulsation on the basis of the temperature of the buffer unit.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: January 29, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hidetaka Nishimura, Yasushi Ichikawa
  • Patent number: 10186721
    Abstract: There is provided a fuel cell system. The fuel cell system comprises a fuel cell configured to generate electric power using a reactive gas; a compressor configured to compress the reactive gas and feed the compressed reactive gas to the fuel cell; a flow rate measurement unit configured to measure a flow rate of the reactive gas; a pressure measurement unit configured to measure a pressure of the compressed reactive gas; a power value acquirer configured to acquire a value of electric power consumed by the compressor; and a determiner configured to perform determination with regard to an abnormality of the fuel cell system and to provide an output indicating that an abnormality occurs.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: January 22, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomio Yamanaka, Tomotaka Ishikawa
  • Patent number: 10186718
    Abstract: A fuel cell includes a membrane electrode assembly, a first metal separator, a second metal separator, linear protrusions, and embossed protrusions. The first metal separator is stacked on the membrane electrode assembly. The second metal separator is stacked on the first metal separator to define a coolant channel between the metal separators. The first metal separator includes wave-shaped protrusions projecting from the first metal separator by a first height to define to form the coolant channel. The linear protrusions are connected to both distal ends of each of the wave-shaped protrusions. The linear protrusions project from the first metal separator by a second height smaller than the first height. The embossed protrusions are connected to tip ends of the linear protrusions. The embossed protrusions project from the first metal separator by a third height larger than the second height to be in contact with the second metal separator.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: January 22, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Naoki Yamano, Toshiki Kawamura, Shuhei Goto, Narutoshi Sugita
  • Patent number: 10141589
    Abstract: A fuel cell system comprises a fuel cell, a tank, a 1st pressure sensor that measures a fill-time pressure, a 2nd pressure sensor that measures a supply piping pressure, a temperature sensor that measures an internal temperature of the tank; and a controller that, when the fuel cell starts, derives an estimated pressure value of the supply piping pressure based on a 1st pressure value that shows the fill-time pressure, the internal temperature when the 1st pressure value was measured, and the internal temperature when the supply piping pressure was measured, and that detects as the supply piping pressure the lower value among the estimated pressure value and the 2nd pressure value that shows the measured supply piping pressure.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: November 27, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Komiya, Masaaki Kondo, Akira Yamashita
  • Patent number: 10069152
    Abstract: In a fuel cell, an electrolyte electrode assembly is sandwiched by a pair of separators, which include a sandwiching section having a fuel gas channel for supplying a fuel gas to an anode and a fuel gas inlet for supplying the fuel gas to the fuel gas channel, a bridge having a fuel gas supply channel for supplying the fuel gas to the fuel gas channel, and a fuel gas supply section having a fuel gas supply passage for supplying the fuel gas to the fuel gas supply channel. During operation of the fuel cell, a pressure loss P1 by the fuel gas in the fuel gas inlet, a pressure loss P2 by the fuel gas in the fuel gas supply channel, and a pressure loss P3 by the fuel gas in the fuel gas supply passage have the relationships of P1>P2 and P1>P3.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: September 4, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Yuki Yoshimine
  • Patent number: 10033056
    Abstract: Systems and methods are provided for regulating fuel cell backpressure or humidity in conjunction with a flow control assembly that recovers energy resulting from the regulation. An exemplary vehicle system includes a fuel cell stack, a flow control valve to regulate a fluid flow exiting the fuel cell stack, and a flow control assembly parallel to the flow control valve to generate electrical energy in response to a bypass portion of the fluid flow that bypasses the flow control valve based on an orientation of the flow control valve with respect to the fluid flow.
    Type: Grant
    Filed: September 13, 2015
    Date of Patent: July 24, 2018
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Mike Guidry, John Mason, Patrick Beresewicz
  • Patent number: 10026975
    Abstract: Each of a plurality of layered power generation elements (2) of a fuel cell (1) is provided with a plate-shaped cell (10), an anode plate (30), and a cathode plate (20). The anode plate (30) has a fuel intake manifold (4), a plurality of first gas channels (35), and a second gas channel (61). A restricting part (80) for restricting the fuel gas, which flows from the fuel intake manifold (4) through the gas inlet (38) into the second gas channel (61), from flowing into the first gas channel (35) is provided along the surface, opposite the gas inlet (38), of the second gas channel (61).
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: July 17, 2018
    Assignee: SUMITOMO PRECISION PRODUCTS CO., LTD.
    Inventor: Hiroyuki Uwani
  • Patent number: 9853316
    Abstract: A fuel cell system includes a target pressure setting unit configured to periodically and repeatedly set a target upper limit pressure and a target lower limit pressure as a target pressure of anode gas. An upper limit pressure setting unit is configured to set the smaller one of an upper limit value based on durability performance and an upper limit value based on output performance as an upper limit pressure of the anode gas. The target pressure setting unit sets a value smaller than the upper limit value as the target upper limit pressure when the upper limit value based on the durability performance of the fuel cell is selected as the upper limit pressure of the anode gas, and sets a pressure higher than the upper limit value as the target upper limit pressure when the upper limit value based on the output performance is selected.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 26, 2017
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takeaki Obata, Yoshitomo Asai, Hayato Chikugo
  • Patent number: 9843057
    Abstract: A fuel cell system for generating power by supplying anode gas and cathode gas to a fuel cell, comprising a compressor for supplying the cathode gas to the fuel cell, a pulsating operation unit causing a pressure of the anode gas to pulsate based on an operation state of the fuel cell system, a first target pressure setting unit setting a first target pressure of the cathode gas based on a request of the fuel cell, a second target pressure setting unit setting a second target pressure of the cathode gas for keeping a differential pressure in the fuel cell to be within a permissible differential pressure range according to the pressure of the anode gas in the fuel cell, and a compressor control unit controlling the compressor based on the first target pressure and the second target pressure. The second target pressure setting unit sets the second target pressure based on an upper limit target pressure in pulsation on the pulsation of the pressure of the anode gas.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: December 12, 2017
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Yoshitomo Asai
  • Patent number: 9831513
    Abstract: A fuel cell system includes a fuel cell stack configured to include a cathode and an anode, an air supplier configured to supply air to the cathode, and an air intake pipe configured to connect an outlet of the air supplier and an inlet of the cathode to each other and having an opening adjustable valve provided thereto. A controller is configured to adjust an opening of the valve according to a supplied amount of air to control a flow rate of air supplied to the cathode. Thereby, the fuel cell stack is prevented from drying-out, and durability of a fuel cell is improved.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: November 28, 2017
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Jae Won Jung
  • Patent number: 9692065
    Abstract: A hydrogen supply unit is provided with an inflow block having an inflow passage for hydrogen gas, an outflow block having an outflow passage for hydrogen gas, injectors for adjusting a flow rate and a pressure of hydrogen gas, a secondary pressure sensor for detecting hydrogen gas pressure in the inflow passage, and a tertiary pressure sensor for detecting hydrogen gas pressure in the outflow passage. An inlet side of each injector is connected to the inflow passage and an outlet side of each injector is connected to the outflow passage. The hydrogen gas allowed to flow in the inflow passage is injected by each injector into the outflow passage and thereby reduced in pressure. Each of the injectors, secondary pressure sensor, and tertiary pressure sensor are held between the inflow block and outflow block.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: June 27, 2017
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu Nagata
  • Patent number: 9299997
    Abstract: To improve an output of a fuel cell and power generation efficiency by enhancing drainage of the fuel cell upon actuation below freezing temperature. In a fuel cell system that generates power by supplying fuel gas and oxidant gas, the output of the fuel cell is measured when a temperature of the fuel cell after the actuation below freezing temperature exceeds 0 degree, and if a value of the output is equal to or less than a reference output value, pressure pulsation is applied to a cathode electrode to drain water built up in the fuel cell.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: March 29, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yuji Ishikawa
  • Patent number: 9214689
    Abstract: A fuel cell power plant stops anode gas supply to a fuel cell stack 1 by an anode gas supply mechanism 20 when an anode gas pressure in the fuel cell stack 1 reaches an upper limit pressure, and resumes supplying the anode gas by the anode gas supply mechanism 20 when the anode gas pressure in the fuel cell stack 1 lowers to a lower limit pressure. A sensor 52-54 detects if a hydrogen supply amount supplied to the fuel cell stack 1 satisfies a required amount to generate a target generated power, and a controller 51 corrects the lower limit pressure in an increasing direction when the hydrogen supply amount does not satisfy the required amount, thereby suppressing a generated power of the fuel cell stack 1 from reducing even when a flooding takes place in the fuel cell stack 1.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: December 15, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yousuke Tomita, Masashi Sato
  • Publication number: 20150140465
    Abstract: A supply device for supplying at least one fuel is provided. The supply device includes a first fluid circuit and a second fluid circuit, the former to supply the/each fuel cell with fuel and the latter to supply the/each fuel cell with combustion agent. The first circuit includes a first supply line having a first solenoid valve and a first starter configured to allow for the circulation of fluid in the first circuit towards the/each fuel cell when the electrical control of the first solenoid valve is inoperative. The second circuit includes a second supply line having a second solenoid valve and a second starter configured to allow for the circulation of fluid in the second circuit towards the/each fuel cell when the electrical control of the second solenoid valve is inoperative. The supply device includes at least one pressure-actuated reducer arranged on the first circuit and actuated by a pressure in the second circuit.
    Type: Application
    Filed: July 10, 2013
    Publication date: May 21, 2015
    Inventor: Thierry Geneston
  • Publication number: 20150132677
    Abstract: A solid oxide fuel cell or a solid oxide electrolyzing cell, including a plurality of cathode-anode-electrolyte units, each CAE-unit having a first electrode for an oxidizing agent, a second electrode for a combustible gas, and a solid electrolyte between the first electrode and the second electrode and an interconnect between the CAE-units. The interconnect including oxidant inlet and outlet sides defining an oxidant flow direction of the oxidizing agent flow, a first gas distribution element. The first gas distribution element contacts the second electrode of the CAE-unit, and a second gas distribution element with oxidizing agent has channels connecting the oxidant inlet and outlet sides. The oxidizing agent channels are in contact with the first electrode of an adjacent CAE-unit, and a least one bypass channel for the oxidant flow arranged such that the bypass channel is not in contact with the first electrode.
    Type: Application
    Filed: June 11, 2013
    Publication date: May 14, 2015
    Inventor: Zacharie Wuillemin
  • Patent number: 9017891
    Abstract: The present invention relates to a hydrogen fed power system comprising: a high-pressure hydrogen container (150), at least one hydrogen driven energy converter such as a fuel cell (159) connecting to the hydrogen container (150), pressure converter (158) for hydrogen gas, located between the high-pressure hydrogen container (150) and the lower pressure energy converter (159). The invention also relates to a vehicle as well as to a stand-alone electric power unit provided with such an hydrogen fed power system. Furthermore the present invention relates a method for use of the hydrogen fed power system and to a method for filling up the high-pressure hydrogen container of the hydrogen fed power system.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: April 28, 2015
    Assignee: HyET Holding B.V.
    Inventor: Marleen Middelman-Koornneef
  • Patent number: 9020799
    Abstract: A method a system and method for optimizing the power distribution between a fuel cell stack and a high voltage battery in a fuel cell vehicle. The method includes defining a virtual battery hydrogen power for the battery that is based on a relationship between a battery power request from the battery and an efficiency of the battery and defining a virtual stack hydrogen power for the fuel cell stack that is based on a relationship between a stack power request from the fuel cell stack and an efficiency of the fuel cell stack. The virtual battery hydrogen power and the virtual stack hydrogen power are converted into polynomial equations and added together to provide a combined power polynomial equation. The combined power polynomial equation is solved to determine a minimum of the fuel cell stack power request by setting a derivative of the virtual stack hydrogen power to zero.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: April 28, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Oliver Maier
  • Publication number: 20150104722
    Abstract: A valve for reducing the likelihood of ice-related blockage in a fuel cell and methods for starting a fuel cell system. The valve includes a valve plate and coupling plate that are cooperative with one another within a valve body such that flexural forces imparted to the valve plate from a pressurized fluid are transferred to localized contact surfaces between the valve plate and coupling plate. By concentrating these forces to such a localized area, improvements in the ability of the fluid to initiate and propagate a crack in built-up ice around the valve's seating region is improved. In this way, fuel cell starting in cold conditions—such as those associated with temperatures at or below the freezing point of water—is also improved.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: GM Global Technology Operations LLC
    Inventor: Jeffrey A. Rock
  • Patent number: 8999593
    Abstract: An ejector apparatus for a fuel cell includes an ejector main body including an inlet port, an outlet port, a suction port, and an oxidizer-gas supply port, a first to third chambers provided in the body, a nozzle having a nozzle hole discharging the fuel gas, a diffuser mixing the fuel gas discharged from the nozzle hole and the fuel offgas exhausted from the fuel cell and returned to the suction port, a needle fixed on a side of the body and extending along an axial direction of the nozzle in a hollow portion thereof, and first and second diaphragms arranged to oppose each other, and changing an opening area in a gap between the nozzle hole and an outer peripheral face of a top end of the needle, wherein a pressure receiving area of the first diaphragm is set to be larger than that of the second diaphragm.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: April 7, 2015
    Assignees: Keihin Corporation, Honda Motor Co., Ltd.
    Inventors: Takahide Kato, Takao Ikenaga, Kazunori Fukuma
  • Patent number: 8993196
    Abstract: In a fuel cell system including a fuel cartridge and a fuel supply module, the fuel cartridge includes at least two ports, wherein a first port from among the at least two ports is a fuel inlet port and a second port from among the at least two ports is a fuel outlet port. The fuel cartridge may also include a fuel pouch or the fuel cartridge itself may be the fuel pouch. The fuel supply module may include a fuel circulation structure that circulates the fuel before the fuel is supplied to the stack. The fuel cell system may be equipped with an electronic apparatus and serve as a source of power.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 31, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-soo Joung, Hye-jung Cho, Sang-ho Yoon
  • Publication number: 20150086894
    Abstract: A fuel cell system comprises: a turbo type oxidizing agent pump, the rotary shaft of which is pivotally supported by an air bearing to take in and supply an oxidizing agent gas to a fuel cell by the rotary motion; an actual flow rate detection means for the oxidizing agent gas; a pressure adjustment means for the oxidizing agent gas; a rotary speed monitoring means for the oxidizing agent pump; and a control means which, when the rotary speed of the oxidizing agent pump is within the range of the minimum rotary speed that allows the rotary shaft to be pivotally supported by the air bearing, if the actual flow rate of the oxidizing agent gas is larger than a target flow rate, increases the pressure of the oxidizing agent gas via the pressure adjustment means.
    Type: Application
    Filed: April 12, 2013
    Publication date: March 26, 2015
    Inventors: Kenichiro Ueda, Kenji Taruya, Masakazu Hamachi, Nobuki Koiwa
  • Patent number: 8986901
    Abstract: A fuel cell system includes an air supply flow path configured to supply the air to a fuel cell, a reed valve provided in the air supply flow path, an air exhaust flow path configured to allow the air discharged from the fuel cell to flow therethrough, a pressure regulating valve provided in the air exhaust flow path and configured to adjust back pressure of the air supplied to the fuel cell, a bypass flow path configured to connect an upstream section of the air supply flow path upstream of the reed valve with the air exhaust flow path, and a bypass valve provided in the bypass flow path and configured to open and close the bypass flow path. The fuel cell system reduces the opening of the pressure regulating valve with supplying the air to the fuel cell in the closed position of the bypass valve, so as to increase the pressure of the air upstream of the pressure regulating valve, and subsequently opens the bypass valve.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: March 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Koji Katano
  • Patent number: 8980497
    Abstract: A battery capable of reducing swelling is provided. A battery includes a cathode, an anode and an electrolyte. The anode includes a coating containing a SO3-containing compound, and the electrolyte contains an electrolyte salt having reduction power. Therefore, on the surface of the anode, the SO3-containing compound is preferentially reduced and decomposed to become a sulfur-containing compound. In the result, decomposition reaction of the electrolyte is prevented.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: March 17, 2015
    Assignee: Sony Corporation
    Inventors: Hideki Nakai, Atsumichi Kawashima, Akinori Kita
  • Publication number: 20150056533
    Abstract: A fuel cell system includes a target pressure setting unit configured to periodically and repeatedly set a target upper limit pressure and a target lower limit pressure as a target pressure of anode gas. An upper limit pressure setting unit is configured to set the smaller one of an upper limit value based on durability performance and an upper limit value based on output performance as an upper limit pressure of the anode gas. The target pressure setting unit sets a value smaller than the upper limit value as the target upper limit pressure when the upper limit value based on the durability performance of the fuel cell is selected as the upper limit pressure of the anode gas, and sets a pressure higher than the upper limit value as the target upper limit pressure when the upper limit value based on the output performance is selected.
    Type: Application
    Filed: March 13, 2013
    Publication date: February 26, 2015
    Inventors: Takeaki Obata, Yoshitomo Asai, Hayato Chikugo
  • Patent number: 8962209
    Abstract: Fuel cell devices and systems are provided. In certain embodiments, the devices include a ceramic support structure having a length, a width, and a thickness. A reaction zone positioned along a portion of the length is configured to be heated to an operating reaction temperature, and has at least one active layer therein comprising an electrolyte separating first and second opposing electrodes, and active first and second gas passages adjacent the respective first and second electrodes. At least one cold zone positioned from the first end along another portion of the length is configured to remain below the operating reaction temperature. An artery flow passage extends from the first end along the length through the cold zone and into the reaction zone and is fluidicly coupled to the active first gas passage, which extends from the artery flow passage toward at least one side. The thickness of the artery flow passage is greater than the thickness of the active first gas passage.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: February 24, 2015
    Inventors: Alan Devoe, Lambert Devoe
  • Patent number: 8945788
    Abstract: A fuel cell system whose fuel loss caused by the crossover of the fuel is small and which can be operated economically. The fuel cell system includes a fuel cell 10, a primary feeding system 12 for feeding a primary fuel which is a liquid fuel to the fuel cell 10, a secondary feeding system 13 for feeding a secondary fuel which is a liquid fuel whose saturation vapor pressure is lower than that of the primary fuel to the fuel cell 10, a ECU 30 for controlling each part so that the primary fuel in the fuel cell is replaced with the secondary fuel when terminating the operation of the fuel cell 10.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: February 3, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Haruyuki Nakanishi, Hidekazu Arikawa, Kazuya Uchisasai
  • Publication number: 20150030952
    Abstract: The present disclosure is directed to a method and system for dynamically controlling seal decompression. The method includes monitoring a set of parameters associated with an operation of a seal, wherein the set of parameters includes a maximum pressure subjected to the seal and an exposure time at the maximum pressure, calculating a target pressure ramp down rate based on at least one of the maximum pressure and the exposure time, and decreasing a pressure about the seal at a decompression rate that is based on the target pressure ramp down rate.
    Type: Application
    Filed: July 18, 2014
    Publication date: January 29, 2015
    Applicant: NUVERA FUEL CELLS, INC.
    Inventor: Scott Blanchet
  • Publication number: 20150030953
    Abstract: A fuel cell system includes a fuel cell stack, a compressor, a cathode flow passage, a bypass flow passage branching from the cathode flow passage, thereby bypassing the stack, a bypass valve adjusting a bypass flow rate, a stack flow rate sensor detecting a flow rate to the stack, and a compressor flow rate sensor detecting a flow rate into the compressor. A flow rate for the stack depending on a state of a fuel cell and a flow rate the compressor controls depending on a requirement different from that of the stack are calculated. A control unit controls, when the flow rate required from the compressor is more than that required by the stack, the compressor based on the flow rate required from the compressor and a detected compressor flow rate, and controls the bypass valve based on the flow rate required by the stack and a detected stack flow rate.
    Type: Application
    Filed: February 27, 2013
    Publication date: January 29, 2015
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yoshitomo Asai, Hiroshi Takeda
  • Publication number: 20150017562
    Abstract: A fuel cell system includes a pressure regulating valve configured to control a pressure of an anode gas to be supplied to a fuel cell, a buffer unit configured to store an anode off-gas discharged from the fuel cell, and a purge valve configured to control an amount to be discharged to an outside of the anode off-gas stored in the buffer unit. The pressure of the anode gas periodically increases/decreases by periodically opening/closing the pressure regulating valve. The purge valve is controlled so that a purge flow rate increases more during pressure reduction of the pulsation operation than during pressure increase in pulsation operation control.
    Type: Application
    Filed: February 27, 2013
    Publication date: January 15, 2015
    Applicant: Nissan Motor Co., Ltd
    Inventors: Yasushi Ichikawa, Keigo Ikezoe
  • Patent number: 8932772
    Abstract: In a fuel cell system, a controller is programmed to control a first gas supply mechanism to deliver a first gas containing a fuel gas to a cathode in a pre-stop process performed at a system stop of the fuel cell system. The controller is programmed to control the first gas supply mechanism to stop the delivery of the first gas in a first state where a partial pressure difference between an anode and the cathode with respect to at least the fuel gas of remaining gases in the anode and in the cathode is reduced to or below a preset reference value.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: January 13, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideyuki Kumei, Manabu Kato, Michihito Tanaka
  • Publication number: 20150004513
    Abstract: A fuel cell system that generates power by supplying anode gas and cathode gas to a fuel cell has a control valve that controls pressure of the anode gas supplied to the fuel cell, a pulsation operation unit that causes pulsation of pressure of anode gas in the fuel cell in accordance with a predetermined pressure by controlling an opening degree of the control valve based on an operating condition of the fuel cell system, and a stagnation point determination unit that determines, based on a change in the pressure of the anode gas in the fuel cell, whether or not a stagnation point exists where an anode gas concentration is locally low in the fuel cell. When the stagnation determining unit determines that the stagnation point exists in the fuel cell, the pulsation operation unit increases the predetermined pressure in execution of a pulsation operation.
    Type: Application
    Filed: December 28, 2012
    Publication date: January 1, 2015
    Applicant: Nissan Motor Company, Ltd.
    Inventors: Keigo Ikezoe, Hayato Chikugo, Shinichi Makino