Patents by Inventor Yutaka Ebato
Yutaka Ebato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11799096Abstract: A power generation cell of a fuel cell stack includes a resin frame equipped MEA and a first metal separator and a second metal separator. In the power generation cell, the relationship of P1>P2>P3 is satisfied, where P1 indicates a first surface pressure applied from a first seal part and a second seal part to a resin frame member, P2 indicates a second surface pressure applied from a first support part and a second support part to the overlap part, and P3 indicates a third surface pressure applied from first flow field forming protrusions and second flow field forming protrusions to the power generation area.Type: GrantFiled: October 20, 2020Date of Patent: October 24, 2023Assignee: Honda Motor Co., Ltd.Inventors: Yutaka Ebato, Satoru Terada
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Publication number: 20230290982Abstract: A method of producing the fuel cell stack, including: a stacking step of stacking a plurality of power generation cells each including a membrane electrode assembly, a pair of separator plates sandwiching the membrane electrode assembly, and a seal member; and a compressing step of applying a compression load to the plurality of power generation cells stacked. In the compressing step, the compression load is applied in a manner that the membrane electrode assembly is plastically deformed, without exceeding an elastic limit of the seal member.Type: ApplicationFiled: February 20, 2023Publication date: September 14, 2023Inventors: Yutaka EBATO, Satoshi OYAMA, Takaaki MITSUOKA
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Publication number: 20220311031Abstract: A leak inspection method and a leak inspection apparatus for a fuel cell stack, in which a plurality of fuel cells are stacked, each having an electrode member and a pair of separators sandwiching the electrode member therebetween, and seal members provided on an outer peripheral portion of each of the separators, wherein a first leak inspection is performed by applying a fastening load which is a load applied to the fuel cell stack at a time of product shipment, and a second leak inspection is performed by applying to the fuel cell stack a second load which is lower than the fastening load.Type: ApplicationFiled: February 27, 2022Publication date: September 29, 2022Inventors: Yutaka EBATO, Takaaki MITSUOKA, Satoshi OYAMA
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Publication number: 20220123328Abstract: A power generation cell of a fuel cell stack includes a resin frame equipped MEA and a first metal separator and a second metal separator. In the power generation cell, the relationship of P1>P2>P3 is satisfied, where P1 indicates a first surface pressure applied from a first seal part and a second seal part to a resin frame member, P2 indicates a second surface pressure applied from a first support part and a second support part to the overlap part, and P3 indicates a third surface pressure applied from first flow field forming protrusions and second flow field forming protrusions to the power generation area.Type: ApplicationFiled: October 20, 2020Publication date: April 21, 2022Inventors: Yutaka EBATO, Satoru TERADA
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Patent number: 11302935Abstract: In a fuel cell stack, a stack body includes a plurality of power generation cells stacked in a stacking direction, and a first dummy cell is provided at one end of the stack body in the stacking direction. The first dummy cell includes a dummy assembly, a dummy resin frame member, and a dummy joint separator. The dummy resin member includes a first resin sheet and a second resin sheet. An inner exposed portion is provided in an inner periphery of the first resin sheet. The inner exposed portion extends inward beyond an inner end of the second resin sheet. A first heat welding portion is provided discontinuously in a stack part where the inner exposed portion and the first electrically conductive porous sheet of the dummy assembly are stacked together. The dummy resin frame member and the dummy assembly are joined together by the first heat welding portion.Type: GrantFiled: April 23, 2019Date of Patent: April 12, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yutaka Ebato, Takashi Kato
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Patent number: 11196058Abstract: A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member having a first frame shaped sheet provided on an outer peripheral portion of the membrane electrode assembly over the entire periphery. An outer peripheral portion of an electrolyte membrane is provided between a cathode and the first frame shaped sheet, stacked on an outer peripheral portion of the cathode, and joined to an inner peripheral portion of the first frame shaped sheet through an adhesive layer. The adhesive layer is filled in an area surrounded by an inner peripheral end of the first frame shaped sheet, an anode, and the electrolyte membrane.Type: GrantFiled: July 30, 2019Date of Patent: December 7, 2021Assignee: Honda Motor Co., Ltd.Inventors: Yutaka Ebato, Satoru Terada, Takashi Kato, Matthew J. Beutel
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Patent number: 11133514Abstract: A resin frame equipped membrane electrode assembly includes a membrane electrode assembly and a resin frame member around an outer peripheral portion of the membrane electrode assembly. An inner end of the resin frame member is joined to an electrolyte membrane. In the state before the inner end is joined to the electrolyte membrane, the inner end is narrowed inward in a manner that a surface of the inner end adjacent to the electrolyte membrane gets closer to a surface of the inner end opposite to the electrolyte membrane.Type: GrantFiled: April 28, 2020Date of Patent: September 28, 2021Assignee: HONDA MOTOR CO., LTD.Inventors: Suguru Ohmori, Yutaka Ebato
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Patent number: 11121384Abstract: A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member having a first frame shaped sheet provided on an outer peripheral portion of the membrane electrode assembly. An outer peripheral portion of an electrolyte membrane is provided between a cathode and the first frame shaped sheet, stacked on an outer peripheral portion of the cathode, and joined to an inner peripheral portion of the first frame shaped sheet through an adhesive layer. The elastic modulus of the first frame shaped sheet is larger than the elastic modulus of the electrolyte membrane. The elastic modulus of the adhesive layer is smaller than the elastic modulus of the first frame shaped sheet and the elastic modulus of the electrolyte membrane.Type: GrantFiled: July 30, 2019Date of Patent: September 14, 2021Assignee: Honda Motor Co., Ltd.Inventors: Yutaka Ebato, Satoru Terada, Hiroyuki Tanaka, Matthew J. Beutel
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Patent number: 11101472Abstract: A resin film equipped MEA of a power generation cell includes a membrane electrode assembly and a resin film. An inner peripheral end of a first frame shaped sheet of the resin film is positioned outside an outer peripheral end of a cathode, and faces the outer peripheral end of the cathode so as to be separated by a gap. An inner peripheral portion of a second frame shaped sheet is held between the anode and the cathode. A first metal separator facing the first frame shaped sheet is provided with protruding support structure configured to support an inner peripheral portion of the first frame shaped sheet and an outer peripheral portion of the cathode.Type: GrantFiled: July 17, 2019Date of Patent: August 24, 2021Assignee: HONDA MOTOR CO., LTD.Inventors: Kenji Sasaki, Yutaka Ebato, Takaaki Shikano, Takashi Kato, Sho Nakajima
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Patent number: 11018366Abstract: A frame equipped membrane electrode assembly or a frame equipped MEA of a fuel cell includes a membrane electrode assembly or an MEA and a frame member provided on an outer peripheral portion of the MEA. A method of producing the frame equipped MEA includes a first joining step of joining a first resin frame film and a second resin frame film together in a thickness direction to form a film joint body, a welding step of spot welding a first resin sheet to a portion of the first resin frame film facing a second inlet buffer when the fuel cell is formed, to form the frame member, and a second joining step of joining the frame member to the outer peripheral portion of the MEA.Type: GrantFiled: January 18, 2019Date of Patent: May 25, 2021Assignee: Honda Motor Co., Ltd.Inventors: Kentaro Ishida, Matthew Beutel, Yutaka Ebato, Masami Kurimoto, Kohei Yoshida
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Publication number: 20210036339Abstract: A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member having a first frame shaped sheet provided on an outer peripheral portion of the membrane electrode assembly over the entire periphery. An outer peripheral portion of an electrolyte membrane is provided between a cathode and the first frame shaped sheet, stacked on an outer peripheral portion of the cathode, and joined to an inner peripheral portion of the first frame shaped sheet through an adhesive layer. The adhesive layer is filled in an area surrounded by an inner peripheral end of the first frame shaped sheet, an anode, and the electrolyte membrane.Type: ApplicationFiled: July 30, 2019Publication date: February 4, 2021Inventors: Yutaka EBATO, Satoru TERADA, Takashi KATO, Matthew J. BEUTEL
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Publication number: 20210036338Abstract: A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member having a first frame shaped sheet provided on an outer peripheral portion of the membrane electrode assembly. An outer peripheral portion of an electrolyte membrane is provided between a cathode and the first frame shaped sheet, stacked on an outer peripheral portion of the cathode, and joined to an inner peripheral portion of the first frame shaped sheet through an adhesive layer. The elastic modulus of the first frame shaped sheet is larger than the elastic modulus of the electrolyte membrane. The elastic modulus of the adhesive layer is smaller than the elastic modulus of the first frame shaped sheet and the elastic modulus of the electrolyte membrane.Type: ApplicationFiled: July 30, 2019Publication date: February 4, 2021Inventors: Yutaka EBATO, Satoru TERADA, Hiroyuki TANAKA, Matthew J. BEUTEL
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Publication number: 20200388860Abstract: An electrically insulating resin frame is provided on an outer peripheral side of a power generation section of a membrane electrode assembly forming a fuel cell of a fuel cell stack. A seal bead protruding toward the resin frame is formed on a metal separator. A metal sheet is provided in a portion of the resin frame overlapped with the seal bead as viewed in the stacking direction.Type: ApplicationFiled: June 3, 2020Publication date: December 10, 2020Inventors: Satoru Terada, Takaaki Shikano, Takashi Kato, Yutaka Ebato, Takuma Yamawaki, Marina Kawano
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Publication number: 20200259190Abstract: A resin frame equipped membrane electrode assembly includes a membrane electrode assembly and a resin frame member around an outer peripheral portion of the membrane electrode assembly. An inner end of the resin frame member is joined to an electrolyte membrane. In the state before the inner end is joined to the electrolyte membrane, the inner end is narrowed inward in a manner that a surface of the inner end adjacent to the electrolyte membrane gets closer to a surface of the inner end opposite to the electrolyte membrane.Type: ApplicationFiled: April 28, 2020Publication date: August 13, 2020Inventors: Suguru Ohmori, Yutaka Ebato
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Patent number: 10727504Abstract: A power generation cell includes a frame member. The frame member includes a first frame shaped sheet and a second frame shaped sheet that are joined together. The second frame shaped sheet is provided outside a cathode through a gap. A method of operating a fuel cell includes supplying a first reactant gas to a channel formed between the frame member and a first separator, a pressure of the first reactant gas being higher than a pressure of a second reactant gas, and supplying the second reactant gas to a channel formed between the frame member and a second separator.Type: GrantFiled: November 15, 2017Date of Patent: July 28, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Suguru Ohmori, Hiroyuki Tanaka, Kentaro Ishida, Yutaka Ebato, Satoru Terada
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Publication number: 20200235416Abstract: A frame equipped membrane electrode assembly or a frame equipped MEA of a fuel cell includes a membrane electrode assembly or an MEA and a frame member provided on an outer peripheral portion of the MEA. A method of producing the frame equipped MEA includes a first joining step of joining a first resin frame film and a second resin frame film together in a thickness direction to form a film joint body, a welding step of spot welding a first resin sheet to a portion of the first resin frame film facing a second inlet buffer when the fuel cell is formed, to form the frame member, and a second joining step of joining the frame member to the outer peripheral portion of the MEA.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Inventors: Kentaro ISHIDA, Matthew BEUTEL, Yutaka EBATO, Masami KURIMOTO, Kohei YOSHIDA
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Patent number: 10637077Abstract: A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member. The frame member includes a first frame shaped sheet and a second frame shaped sheet. An inner peripheral portion of the first frame shaped sheet is joined to an outer peripheral portion of the membrane electrode assembly. The inner peripheral portion of the first frame shaped sheet is positioned between an outer peripheral portion of an anode and an outer peripheral portion of a cathode. An inner end of the second frame shaped sheet is positioned outside an outer end of the anode over the entire periphery. The outer end of the cathode is positioned outside the inner end of the second frame shaped sheet over the entire periphery.Type: GrantFiled: March 2, 2018Date of Patent: April 28, 2020Assignee: Honda Motor Co., Ltd.Inventors: Yutaka Ebato, Kentaro Ishida, Kenji Sasaki, Hiroyuki Tanaka, Takaaki Shikano
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Publication number: 20200028188Abstract: A resin film equipped MEA of a power generation cell includes a membrane electrode assembly and a resin film. An inner peripheral end of a first frame shaped sheet of the resin film is positioned outside an outer peripheral end of a cathode, and faces the outer peripheral end of the cathode so as to be separated by a gap. An inner peripheral portion of a second frame shaped sheet is held between the anode and the cathode. A first metal separator facing the first frame shaped sheet is provided with protruding support structure configured to support an inner peripheral portion of the first frame shaped sheet and an outer peripheral portion of the cathode.Type: ApplicationFiled: July 17, 2019Publication date: January 23, 2020Inventors: Kenji Sasaki, Yutaka Ebato, Takaaki Shikano, Takashi Kato, Sho Nakajima
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Publication number: 20190334183Abstract: In a fuel cell stack, a stack body includes a plurality of power generation cells stacked in a stacking direction, and a first dummy cell is provided at one end of the stack body in the stacking direction. The first dummy cell includes a dummy assembly, a dummy resin frame member, and a dummy joint separator. The dummy resin member includes a first resin sheet and a second resin sheet. An inner exposed portion is provided in an inner periphery of the first resin sheet. The inner exposed portion extends inward beyond an inner end of the second resin sheet. A first heat welding portion is provided discontinuously in a stack part where the inner exposed portion and the first electrically conductive porous sheet of the dummy assembly are stacked together. The dummy resin frame member and the dummy assembly are joined together by the first heat welding portion.Type: ApplicationFiled: April 23, 2019Publication date: October 31, 2019Inventors: Yutaka Ebato, Takashi Kato
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Publication number: 20190273269Abstract: A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member. The frame member includes a first frame shaped sheet and a second frame shaped sheet. An inner peripheral portion of the first frame shaped sheet is joined to an outer peripheral portion of the membrane electrode assembly. The inner peripheral portion of the first frame shaped sheet is positioned between an outer peripheral portion of an anode and an outer peripheral portion of a cathode. An inner end of the second frame shaped sheet is positioned outside an outer end of the anode over the entire periphery. The outer end of the cathode is positioned outside the inner end of the second frame shaped sheet over the entire periphery.Type: ApplicationFiled: March 2, 2018Publication date: September 5, 2019Inventors: Yutaka EBATO, Kentaro ISHIDA, Kenji SASAKI, Hiroyuki TANAKA, Takaaki SHIKANO