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公开(公告)号：US20220034308A1
公开(公告)日：2022-02-03
申请号：US17503450
申请日：2021-10-18
Inventor： SHIGENORI ONUMA , TAKASHI KAKUWA
IPC: F03G7/00 , C25B13/02 , H01M8/0228 , H01M8/0247 , H01M8/026
Abstract: An electrochemical device includes: an electrolyte membrane; an anode disposed on a first main surface of the electrolyte membrane; a cathode disposed on a second main surface of the electrolyte membrane; an anode separator disposed on the anode; and a cathode separator disposed on the cathode and including a first conductive layer on a surface adjacent to the cathode. The cathode includes a cathode gas diffusion layer. The cathode separator has a recess for storing the cathode gas diffusion layer. The first conductive layer is disposed only on a bottom surface of the recess.
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公开(公告)号：US20200028192A1
公开(公告)日：2020-01-23
申请号：US16451165
申请日：2019-06-25
Inventor： SHIGENORI ONUMA , TAKASHI KAKUWA , YUICHI MIKAMI , TOMOHIRO KUROHA
IPC: H01M8/04955 , H01M8/04537 , H01M8/04746 , H01M8/0432 , H01M8/1253 , H01M8/0612 , H01M8/04828 , H01M8/04858
Abstract: A fuel cell system includes: a fuel cell stack including a plurality of cells, each of which has a fuel electrode, an air electrode, and an electrolyte, and performs a power generation by a reaction between a fuel gas and air; a fuel supplier supplying the fuel gas to the fuel electrode; an air supplier supplying the air to the air electrode; a voltage detector detecting the voltage of the fuel cell stack; and a controller stopping the supplying of the fuel gas by the fuel supplier and the supplying of the air by the air supplier when the voltage of the fuel cell stack detected by the voltage detector is decreased to be lower than a threshold voltage after the power generation of the fuel cell stack is stopped.
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公开(公告)号：US20190288316A1
公开(公告)日：2019-09-19
申请号：US16280041
申请日：2019-02-20
Inventor： TAKASHI KAKUWA , SHIGENORI ONUMA , YUICHI MIKAMI
IPC: H01M8/04955 , H01M8/1233 , H01M8/04303 , H01M8/0432 , H01M8/04701 , H01M8/04746 , H01M8/0612
Abstract: A SOFC system includes: a fuel cell stack; a reformer; an air supplier: a combustor; and a controller. In a stop control of the above system, the controller calculates an average of ratios of the air to the raw material supplied to the reformer as a first average, in a case in which a molar fraction of a hydrogen component in the anode off-gas is higher than a molar fraction of a raw material component in the anode off-gas, and calculates the average of the ratios of the air to the raw material supplied to the reformer as a second average, in a case in which the molar fraction of the hydrogen component in the anode off-gas is lower than the molar fraction of the raw material component in the anode off-gas. The controller controls the air supplier so that the first average is higher than the second average.
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公开(公告)号：US20190173110A1
公开(公告)日：2019-06-06
申请号：US16184966
申请日：2018-11-08
Inventor： TAKASHI KAKUWA
IPC: H01M8/04089 , H01M8/1007
Abstract: A solid oxide fuel cell system includes a fuel cell stack that generates electric power through a reaction between a fuel gas and an oxidizing gas; a combustor in which anode and cathode off-gases discharged from the fuel cell stack are burned by diffusion combustion; a temperature sensor that detects temperature of the anode off-gas flowing into the combustor; and a controller. When the system is in at least one of the following states during power generation, the controller instructs the system to perform a power-generation control action for preventing failed combustion reactions: the temperature of the anode off-gas, detected by the temperature sensor, is below a first predetermined temperature for a predetermined continuous period of time; the temperature of the anode off-gas decreases by not less than a predetermined second temperature range during a predetermined period of time.
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公开(公告)号：US20180301718A1
公开(公告)日：2018-10-18
申请号：US15939408
申请日：2018-03-29
Inventor： TAKASHI KAKUWA
IPC: H01M8/04014 , C01B3/36 , H01M8/0662 , H01M8/04089 , H01M8/04746 , H01M8/12
Abstract: A fuel cell system includes a fuel cell, and a burner. The burner has anode off-gas apertures and first and second cathode off-gas apertures. In a cross section of the burner at a cutting plane that passes a first cathode off-gas aperture, an anode off-gas aperture, and a second cathode off-gas aperture that are aligned on a straight line when seen in plan view, the first cathode off-gas aperture is provided on one side of the anode off-gas aperture such that a vector of an ejecting direction of cathode off-gas forms a first acute angle with a vector of an ejecting direction of anode off-gas, and the second cathode off-gas aperture is provided on the other side of the anode off-gas aperture such that the vector of the ejecting direction of cathode off-gas forms a second acute angle with the vector of the ejecting direction of anode off-gas.
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Patent Agency Ranking
公开(公告)号：US20170338506A1
公开(公告)日：2017-11-23
申请号：US15590871
申请日：2017-05-09
Inventor： TAKASHI KAKUWA , SHIGENORI ONUMA
IPC: H01M8/1231 , H01M8/0612 , H01M8/1246 , H01M8/1233 , H01M8/124
CPC classification number: H01M8/1231 , B01J8/008 , B01J8/0257 , B01J8/0278 , B01J8/0285 , B01J2208/00504 , B01J2208/0053 , C01B3/38 , F23D14/22 , H01M8/04022 , H01M8/0618 , H01M8/0637 , H01M8/1233 , H01M8/1246 , H01M8/2428 , H01M2008/1293 , H01M2250/10 , H01M2300/0074 , Y02B90/14 , Y02E60/525 , Y02E60/566 , Y02P70/56
Abstract: A high-temperature fuel cell system includes a reformer that reforms a hydrocarbon-based raw fuel to generate a reformed gas containing hydrogen, a fuel cell that generates power by using the reformed gas and an oxidant gas, and a burner that heats the reformer. The burner includes an anode-off-gas gathering portion that has an anode-off-gas ejection hole and at which an anode off-gas discharged from an anode of the fuel cell gathers. The anode-off-gas gathering portion surrounds a first cathode-off-gas passing area through which a cathode off-gas discharged from a cathode of the fuel cell passes. The anode-off-gas ejection hole is formed such that the anode off-gas ejected upward from the anode-off-gas ejection hole approaches the cathode off-gas passing upward through the first cathode-off-gas passing area. The anode off-gas ejected from the anode-off-gas ejection hole and the cathode off-gas that has passed through the first cathode-off-gas passing area are burned.
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公开(公告)号：US20240011174A1
公开(公告)日：2024-01-11
申请号：US18472299
申请日：2023-09-22
Inventor： TAKASHI KAKUWA , OSAMU SAKAI , HIROMI KITA
IPC: C25B15/021 , C25B1/04 , C25B9/05
CPC classification number: C25B15/021 , C25B1/04 , C25B9/05
Abstract: A compressor device includes: a compressor that causes, by applying a voltage between an anode and a cathode, hydrogen in an anode gas to move through an electrolyte membrane to the cathode and compresses the hydrogen; a regulator that regulates the temperature of the anode gas in the compressor; and a controller that controls the regulator to regulate the temperature of the anode gas at an outlet of the anode based on at least one of the pressure of a cathode gas or a current flowing between the anode and the cathode under the application of the voltage.
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公开(公告)号：US20230313788A1
公开(公告)日：2023-10-05
申请号：US18302092
申请日：2023-04-18
Inventor： TAKASHI KAKUWA , HIROMI KITA , OSAMU SAKAI
IPC: F04B17/00
CPC classification number: F04B17/00
Abstract: A compression apparatus includes at least one compression unit, a voltage applier, an anode end plate provided on an anode separator located at a first end in a direction of stacking, a cathode end plate provided on a cathode separator located at a second end in the direction of stacking, a first seal material that surrounds an outer periphery of the cathode, and a second seal material that surrounds an outer periphery of a first space in which to store compressed hydrogen, the first space being provided between the cathode end plate and the cathode separator located at the second end. The compression apparatus causes, by using the voltage applier to apply a voltage, protons taken out from an anode fluid that is supplied to the anode to move to the cathode via the electrolyte membrane and produces compressed hydrogen. An area of a region surrounded by the second seal material is larger than an area of a region surrounded by the first seal material.
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公开(公告)号：US20210310137A1
公开(公告)日：2021-10-07
申请号：US17346423
申请日：2021-06-14
Inventor： TAKASHI KAKUWA , HIROMI KITA , OSAMU SAKAI
Abstract: A compression apparatus includes an electrolyte membrane, an anode on a principal surface of the electrolyte membrane, a cathode on another principal surface of the electrolyte membrane, an anode separator on the anode, a cathode separator on the cathode, and a voltage applicator. Upon the voltage applicator applying a voltage between the anode and the cathode, protons are extracted from an anode fluid fed to the anode to migrate to the cathode through the electrolyte membrane and compressed hydrogen is produced. The cathode separator has a first O-ring groove formed in a cathode-side principal surface of the cathode separator to surround a region of the cathode-side principal surface which faces the cathode. The compression apparatus includes a first O-ring held by the first O-ring groove and a face seal disposed on an outer periphery of a region of an anode-side principal surface of the anode separator which faces the anode.
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公开(公告)号：US20190356003A1
公开(公告)日：2019-11-21
申请号：US16380332
申请日：2019-04-10
Inventor： TOMOYA KAMATA , TAKASHI KAKUWA
IPC: H01M8/04858 , H01M8/0612 , H01M8/04828 , H01M8/04746 , H01M8/12
Abstract: A fuel cell system includes a fuel cell stack that generates electricity using fuel and oxidant gases, a reformer that produces the fuel gas by reforming a raw material, a raw material feeder that supplies the raw material to the reformer, a combustor that combusts anode off-gas discharged from the anode of the fuel cell stack, and a controller that controls the raw material feeder. The period of a load-following operation in which the power output of the fuel cell stack shifts from a lower level to a higher level, is divided into multiple sub-periods. For each sub-period, a ratio is determined from the increase amounts in the flow rate of the raw material during the sub-period and the length of the sub-period. The controller controls the raw material feeder to make a ratio on the higher output side smaller than another on the lower output side.
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