Patents by Inventor Yu TOMANA

Yu TOMANA 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).

  • Patent number: 11101470
    Abstract: Oxygen-containing gas discharge passages are provided in a first metal separator of a fuel cell of a fuel cell stack. The oxygen-containing gas discharge passages include an upper oxygen-containing gas discharge passages and a lower oxygen-containing gas discharge passage. In the first metal separator, a central position at the center between the upper oxygen-containing gas discharge passage and the lower oxygen-containing gas discharge passage is positioned below the center of an oxygen-containing gas flow field in the gravity direction.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: August 24, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kentaro Ishida, Yu Tomana, Hiroshi Morikawa, Yosuke Nishida, Takahiro Fukuchi
  • Patent number: 11063267
    Abstract: A fuel cell separator (first and second separators) of a fuel cell stack is formed in a plate shape, and includes a passage bead (projection) configured to form a seal that prevents leakage of fluid. The passage bead is formed integrally with a surface of the separator in a manner so as to project from the surface, and when viewed in cross section, is formed in a multistage trapezoidal shape.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: July 13, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Satoshi Oyama, Yu Tomana
  • Patent number: 11063269
    Abstract: A power generation cell includes a resin film equipped MEA and a first metal separator. The first metal separator includes an oxygen-containing gas flow field, an outer peripheral bead, and a first bypass stopping convex portion. An oxygen-containing gas flows across the oxygen-containing gas flow field along an electrode surface. The outer peripheral bead surrounds the oxygen-containing gas flow field to prevent leakage of a reactant gas. The first bypass stopping convex portion extends from the outer peripheral bead. A corner of a cathode on at least one end in the flow field direction of the oxygen-containing gas flow field is overlapped with an apex portion of the first bypass stopping convex portion.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: July 13, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yosuke Nishida, Yu Tomana
  • Patent number: 10991955
    Abstract: Systems and methods including a header flange to evenly distribute contact pressure across seals include, in some aspects, a plate including a bead and a flange edge. The bead includes a bead-side and a bead-corner. The flange edge defines an aperture through the plate. The flange edge also includes a first edge-portion proximate the bead-side and a second edge-portion proximate the bead-corner. The bead-side and the first edge-portion define a first edge-distance therebetween. The bead-corner and the second edge-portion define a second edge-distance therebetween. The second edge-distance is greater than the first edge-distance.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: April 27, 2021
    Assignees: GM Global Technology Operations LLC, Honda Motor Co., Ltd.
    Inventors: Liang Xi, Xi Yang, Kentaro Ishida, Siguang Xu, Satoshi Oyama, Yu Tomana, Richard D. Blakeley
  • Patent number: 10923740
    Abstract: A fuel gas supply passage is provided at a central position of one side of opposing sides of a separator. A fuel gas supply passage is provided close to a fuel gas flow field in comparison with any of a plurality of fluid passages provided along the one side. An identification mark of the separator is provided between the fuel gas supply passage and an outer peripheral end of the separator.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: February 16, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yu Tomana, Kentaro Ishida, Satoshi Oyama, Masahiro Matsutani, Akihito Giga
  • Patent number: 10910658
    Abstract: A fluid passage for supplying or discharging fluid extends through a metal separator in a separator thickness direction, and a bead seal configured to prevent leakage of the fluid protrudes from the metal separator. A folded portion is formed in an outer marginal portion of the metal separator or in an inner marginal portion of the fluid passage, and the folded portion is bent or curved in a direction opposite to the protruding direction of the bead seal.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: February 2, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kentaro Ishida, Yu Tomana
  • Patent number: 10886556
    Abstract: A first metal separator of a power generation cell includes an oxygen-containing gas flow field extending along an electrode surface of a membrane electrode assembly, an oxygen-containing gas supply passage connected to the oxygen-containing gas flow field and extending through the first metal separator in a separator thickness direction, and a passage bead formed around the oxygen-containing gas supply passage and protruding in the separator thickness direction. A water drainage channel configured to connect an inner space of the passage bead with the oxygen-containing gas supply passage is provided at a lower portion of the passage bead.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: January 5, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yu Tomana, Kentaro Ishida
  • 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: 10784524
    Abstract: A first metal separator of a power generation cell includes boss pairs. Each of the boss pairs includes two first bosses provided adjacent to a hole and adjacent to each other between a passage bead and an oxygen-containing gas flow field. A gap facing the hole is formed between the two first bosses. The second metal separator includes one second boss facing the boss pair through a resin film. The second boss extends over the two first bosses as viewed in a separator thickness direction.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: September 22, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yu Tomana, Kentaro Ishida
  • Patent number: 10763521
    Abstract: A coolant flow field is formed between first and second metal separator plates of a joint separator (fuel cell separator). First and second beads protrude from the first and second metal separator plates. The beads include inner beads for preventing leakage of a reactant gas. An air release passage and a coolant drain passage extend through the fuel cell separator in a separator thickness direction, and the air release passage and the coolant drain passage are connected to a coolant flow field through a first connection channel and a second connection channel formed by recesses on the back of protrusions of the first and second beads.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: September 1, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yu Tomana, Satoshi Oyama
  • Patent number: 10741861
    Abstract: A power generating cell is equipped with an MEA to which a resin frame is attached, and a first metal separator. In the first metal separator, there are provided an oxygen-containing gas flow field through which an oxygen-containing gas flows along an electrode surface, an outer peripheral bead surrounding the oxygen-containing gas flow field and which prevents leakage of a reaction gas, and a plurality of first bypass stopping convex portions that prevent bypassing of the reaction gas. Intermediate convex portions that support the resin film are provided between mutually adjacent ones of the first bypass stopping convex portions.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: August 11, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kentaro Ishida, Yu Tomana, Akihito Giga
  • Patent number: 10573905
    Abstract: In a power generation cell, first bypass stop protrusions for preventing bypassing of an oxygen-containing gas are provided between an end of an oxygen-containing gas flow field in a flow field width direction and an outer peripheral bead. An end wavy ridge includes curves recessed away from the outer peripheral bead. The first bypass stop protrusions are provided between the recessed curves and the outer peripheral bead. A first metal separator has first support protrusions for supporting a cathode, between the recessed curves and the first bypass stop protrusions.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: February 25, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kentaro Ishida, Yu Tomana, Kenji Sasaki
  • Publication number: 20200020958
    Abstract: A fuel cell separator (first and second separators) of a fuel cell stack is formed in a plate shape, and includes a passage bead (projection) configured to form a seal that prevents leakage of fluid. The passage bead is formed integrally with a surface of the separator in a manner so as to project from the surface, and when viewed in cross section, is formed in a multistage trapezoidal shape.
    Type: Application
    Filed: July 10, 2019
    Publication date: January 16, 2020
    Inventors: Satoshi Oyama, Yu Tomana
  • Publication number: 20200014041
    Abstract: In a coolant inlet bridge section of a fuel cell separator member constituting a component of a fuel cell stack, as viewed in plan from a separator thickness direction, a first projection forming a first communication passage that communicates with a coolant supply passage extends in a manner so as to intersect with a second communication passage bead section, and a second projection forming a second communication passage configured to enable mutual communication between the first communication passage and a coolant flow field extends in a manner so as to intersect with a first communication passage bead section.
    Type: Application
    Filed: July 3, 2019
    Publication date: January 9, 2020
    Inventors: Shuhei Goto, Yu Tomana, Akihito Giga
  • 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: 10522852
    Abstract: A plate assembly includes a first plate having a planar portion and a first bead seal formed therein. The first bead seal includes a first end surface spaced away from the planar portion. The first bead seal includes first and second opposing sides extending away from the first end surface and contiguous with the planar portion. The first bead seal includes a first reinforcement structure having a first plurality of walls each intersecting the first opposing side of the first bead seal. The first plate includes a second bead seal formed therein. The first bead seal and the second bead seal may be joined via the first reinforcement structure such that the first plurality of walls of the first reinforcement structure each intersect a third opposing side of the second bead seal.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: December 31, 2019
    Assignees: GM Global Technology Operations LLC., Honda Motor Co., Ltd.
    Inventors: Xi Yang, Siguang Xu, Liang Xi, Richard D. Blakeley, Masaaki Sakano, Yu Tomana, Kentaro Ishida
  • Publication number: 20190393514
    Abstract: A cutout is formed in a passage bead of a first metal separator of a joint separator (fuel cell separator). The cutout connects an oxygen-containing gas flow field and an oxygen-containing gas supply passage. Channel forming ridges are provided in the cutout, integrally with the first metal separator. The channel forming ridges extend between the oxygen-containing gas supply passage and the oxygen-containing gas flow field. Connection channels connecting the oxygen-containing gas flow field and the oxygen-containing gas supply passage are formed on both sides of the channel forming ridges.
    Type: Application
    Filed: June 21, 2019
    Publication date: December 26, 2019
    Inventors: Shuhei Goto, Yu Tomana, Akihito Giga
  • Publication number: 20190355999
    Abstract: Systems and methods including a header flange to evenly distribute contact pressure across seals include, in some aspects, a plate including a bead and a flange edge. The bead includes a bead-side and a bead-corner. The flange edge defines an aperture through the plate. The flange edge also includes a first edge-portion proximate the bead-side and a second edge-portion proximate the bead-corner. The bead-side and the first edge-portion define a first edge-distance therebetween. The bead-corner and the second edge-portion define a second edge-distance therebetween. The second edge-distance is greater than the first edge-distance.
    Type: Application
    Filed: June 21, 2019
    Publication date: November 21, 2019
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS LLC, Honda Motor Co., Ltd.
    Inventors: Liang Xi, Xi Yang, Ishida Kentaro, Siguang Xu, Satoshi Oyama, Yu Tomana, Richard D. Blakeley
  • Publication number: 20190288300
    Abstract: A fuel gas supply passage is provided at a central position of one side of opposing sides of a separator. A fuel gas supply passage is provided close to a fuel gas flow field in comparison with any of a plurality of fluid passages provided along the one side. An identification mark of the separator is provided between the fuel gas supply passage and an outer peripheral end of the separator.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 19, 2019
    Inventors: Yu Tomana, Kentaro Ishida, Satoshi Oyama, Masahiro Matsutani, Akihito Giga
  • Publication number: 20190214656
    Abstract: Oxygen-containing gas discharge passages are provided in a first metal separator of a fuel cell of a fuel cell stack. The oxygen-containing gas discharge passages include an upper oxygen-containing gas discharge passages and a lower oxygen-containing gas discharge passage. In the first metal separator, a central position at the center between the upper oxygen-containing gas discharge passage and the lower oxygen-containing gas discharge passage is positioned below the center of an oxygen-containing gas flow field in the gravity direction.
    Type: Application
    Filed: January 8, 2019
    Publication date: July 11, 2019
    Inventors: Kentaro Ishida, Yu Tomana, Hiroshi Morikawa, Yosuke Nishida, Takahiro Fukuchi