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公开(公告)号：US11952671B2
公开(公告)日：2024-04-09
申请号：US16418327
申请日：2019-05-21
Inventor： Kunihiro Ukai , Norihiko Kawabata , Osamu Sakai , Hidenobu Wakita , Jin Zhang , Yukimune Kani
CPC classification number: C25B1/02 , B01D53/326
Abstract: An electrochemical hydrogen pump includes at least one hydrogen pump unit including an electrolyte membrane, an anode on one main surface of the electrolyte membrane, a cathode on the other main surface of the electrolyte membrane, an anode separator on the anode, and a cathode separator on the cathode, the at least one hydrogen pump unit transferring, to the cathode, hydrogen supplied to the anode and pressurizing the hydrogen, a first fixing member for preventing movement of the cathode separator in a direction in which the cathode separator is stacked, a first end plate on the anode separator at one end in the stacking direction, a second end plate on the cathode separator at the other end in the stacking direction, and a first gas flow channel through which hydrogen in the cathode is supplied to a first space between the second end plate and the cathode separator.
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公开(公告)号：US11549187B2
公开(公告)日：2023-01-10
申请号：US16591570
申请日：2019-10-02
Inventor： Kunihiro Ukai , Tsuneyuki Ejima , Norihiko Kawabata
IPC: C25B9/05 , F04B45/047 , C25B1/04 , B01D53/32 , H01M8/026 , H01M8/248 , H01M8/0662
Abstract: An electrochemical hydrogen pump includes: at least one hydrogen pump unit including an electrolyte membrane, an anode, a cathode, an anode separator, and a cathode separator; an anode end plate disposed on the anode separator positioned in a first end in a stacking direction, the first end is one end and the second end is another end; a cathode end plate disposed on the cathode separator positioned in a second end in the stacking direction; a fixing member that prevents at least members from the cathode end plate to the cathode separator positioned in the second end from moving in the stacking direction; a first gas flow channel through which hydrogen generated in the cathode is supplied to a first space disposed between the cathode end plate and the cathode separator positioned in the second end; and a first pressure transmitting member disposed in the first space.
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公开(公告)号：US10833339B2
公开(公告)日：2020-11-10
申请号：US15713124
申请日：2017-09-22
Inventor： Kunihiro Ukai
IPC: H01M8/04007 , H01M8/0612 , H01M8/0432 , H01M8/04014 , H01M8/04746 , H01M8/04828 , H01M8/04119 , H01M8/04701
Abstract: A fuel cell system includes: a solid oxide fuel cell generating power by using, as fuel, air supplied to a cathode and hydrogen-containing gas supplied to an anode; a combustor generating a combustion exhaust gas by combusting anode-off gas and cathode-off gas discharged from the anode and the cathode, respectively; a reformer steam-reforming a material to generate the hydrogen-containing gas supplied to the anode; a first temperature detector detecting temperatures of the combustion exhaust gas and/or the combustor; and a controller performing, if a temperature detected by the first temperature detector is lower than a preset first threshold while the combustor is forming flame, at least one of operations of: increasing a ratio of air consumed to the air supplied in the cathode; decreasing a ratio of hydrogen-containing gas consumed to the hydrogen-containing gas supplied in the anode; and decreasing an amount of water supplied to the reformer.
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公开(公告)号：US10700374B2
公开(公告)日：2020-06-30
申请号：US15817340
申请日：2017-11-20
Inventor： Hideki Nakata , Kunihiro Ukai , Masakazu Aoki
IPC: H01M8/12 , H01M8/04007 , H01M8/0612 , H01M8/04014 , H01M8/04089 , H01M8/1246 , H01M8/14 , H01M8/124
Abstract: A high-temperature operating fuel cell system includes: a fuel cell stack that generates electric power through an electrochemical reaction of an oxidant gas and a reformed gas; a combustor that combusts a cathode off-gas and an anode off-gas; a reformer that generates the reformed gas from a raw material by utilizing heat of an exhaust gas generated by the combustor; a first preheater; a second preheater that preheats the oxidant gas through heat exchange with the exhaust gas and supplies the preheated oxidant gas to the cathode of the fuel cell stack; a casing that contains these components; and a first heat insulator that covers at least part of the casing, wherein the first preheater covers the first heat insulator and preheats the oxidant gas by heat transferred from the casing through the first heat insulator before the oxidant gas is supplied to the second preheater.
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公开(公告)号：US10480087B2
公开(公告)日：2019-11-19
申请号：US15709560
申请日：2017-09-20
Inventor： Kunihiro Ukai , Yuuichi Yakumaru
Abstract: A membrane electrode assembly includes: an electrolyte membrane that includes a pair of main surfaces; a cathode catalyst layer that is provided to one main surface of the electrolyte membrane; an anode catalyst layer that is provided to the other main surface of the electrolyte membrane; a cathode gas diffusion layer that is provided to the cathode catalyst layer; and an anode gas diffusion layer that is provided to the anode catalyst layer. The anode gas diffusion layer includes a metal steel plate that includes a plurality of vent holes through which gas passes, unevenness is provided to a main surface of the metal steel plate that neighbors the anode catalyst layer, and a difference in a height of the unevenness in a thickness direction of the metal steel plate is less than a thickness of the electrolyte membrane.
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Patent Agency Ranking
公开(公告)号：US10989184B2
公开(公告)日：2021-04-27
申请号：US16442578
申请日：2019-06-17
Inventor： Kunihiro Ukai , Hiromi Kita , Takayuki Nakaue
Abstract: An electrochemical hydrogen pump includes a hydrogen pump unit including an electrolyte film, an anode catalyst layer, a cathode catalyst layer, an anode gas diffusion layer, an anode separator, a cathode gas diffusion layer, and a cathode separator, a first end plate and a second end plate, a fastener, and a voltage applicator. The electrochemical hydrogen pump transfers and pressurizes hydrogen on the cathode catalyst layer, when a voltage is applied by the voltage applicator. Cathode gas flow channels in which the cathode gas flows are connected to each other. The amount of thickness reduction of the cathode gas diffusion layer due to compression resulting from fastening of the fastener is larger in the hydrogen pump unit positioned at at least one end of the stacked hydrogen pump units than in the hydrogen pump unit positioned at neither end of the stacked hydrogen pump units.
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公开(公告)号：US10756376B2
公开(公告)日：2020-08-25
申请号：US16377888
申请日：2019-04-08
Inventor： Hidenobu Wakita , Kunihiro Ukai , Osamu Sakai , Yoichiro Tsuji
IPC: H01M8/04 , H01M8/18 , H01M8/04746
Abstract: A hydrogen supply system includes: an electrochemical hydrogen pump including an electrolyte membrane, an anode and a cathode provided to a first and second main surfaces of the electrolyte membrane, respectively, an anode flow path and cathode flow path through which hydrogen flows, and a voltage applicator applying a voltage between the anode and cathode, pressurizing and sending hydrogen supplied to the anode via the anode flow path to the cathode by applying a voltage by the voltage applicator, and supplying the pressurized hydrogen in the cathode flow path to a hydrogen reservoir; a pressure adjuster adjusting a cathode flow path pressure; and a controller controlling the pressure adjuster and making the cathode flow path pressure higher than an anode flow path pressure before starting a hydrogen pressurization action for pressurizing and supplying hydrogen supplied to the anode flow path to the cathode flow path.
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公开(公告)号：US10320016B2
公开(公告)日：2019-06-11
申请号：US15590859
申请日：2017-05-09
Inventor： Osamu Sakai , Kunihiro Ukai , Yasushi Kaneko , Shigenori Onuma , Takashi Kakuwa
IPC: C01B3/06 , H01M8/124 , H01M8/0612 , H01M8/0662 , H01M8/04007 , H01M8/04014
Abstract: A high-temperature fuel cell system includes a fuel cell that includes an anode and a cathode and that generates power by using a fuel gas and an oxidant gas, a fuel-gas path along which the fuel gas flows, an oxidant-gas path along which the oxidant gas flows, an anode-off-gas path along which an anode off-gas flows, a cathode-off-gas path along which a cathode off-gas flows, a combustion space in communication with the anode-off-gas path and the cathode-off-gas path and in which the anode off-gas and the cathode off-gas are burned, a flue-gas path along which a flue gas flows, a cathode-off-gas branch portion disposed on the cathode-off-gas path between the combustion space and the cathode and at which some of the cathode off-gas is branched from the cathode-off-gas path, and a first heat exchanger that enables heat exchange between the oxidant gas, the flue gas, and the cathode off-gas.
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公开(公告)号：US09843061B2
公开(公告)日：2017-12-12
申请号：US14407932
申请日：2014-03-19
Inventor： Yuuichi Yakumaru , Kunihiro Ukai , Susumu Kobayashi
IPC: B01J7/00 , H01M8/0612 , C01B3/38 , B01J19/00 , C01B3/02
CPC classification number: H01M8/0618 , B01J19/0006 , B01J2219/00164 , C01B3/02 , C01B3/384 , C01B2203/0233 , C01B2203/0811 , C01B2203/1058 , C01B2203/1064 , C01B2203/107 , C01B2203/1695
Abstract: A hydrogen generator includes: a reformer configured to generate a hydrogen-containing gas by a reforming reaction of a material gas; a combustor configured to heat the reformer by diffusion combustion of the material gas and combustion air; a supplementary air flow rate adjuster configured to adjust the flow rate of supplementary air added to the material gas; and a controller configured to control the supplementary air flow rate adjuster such that the flow rate of a mixture gas of the material gas and the supplementary air becomes a predetermined value.
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公开(公告)号：US11577196B2
公开(公告)日：2023-02-14
申请号：US16503661
申请日：2019-07-05
Inventor： Kunihiro Ukai , Takayuki Nakaue , Hidenobu Wakita
Abstract: An electrochemical hydrogen pump includes an electrolyte membrane, an anode catalyst layer, a cathode catalyst layer, an anode gas diffusion layer, a cathode gas diffusion layer, an anode separator, a cathode separator, a first end plate and a second end plate that are disposed on the respective ends of at least one hydrogen pump unit in which the electrolyte membrane, the catalyst layers, the gas diffusion layers, and the separators are stacked on each other, a fastener that fastens the end plates and at least one hydrogen pump unit, and a voltage applier. The electrochemical hydrogen pump transfers hydrogen from the anode catalyst layer to the cathode catalyst layer and pressurizes hydrogen when the voltage applier applies the voltage. The cathode gas diffusion layer includes a water-repellent carbon fiber layer in a main surface thereof that is on a side of the cathode catalyst layer, and is compressed by the fastener.
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