Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Nok Corporation

Shuhei Goto

Narutoshi Sugita

Seiji Sugiura

Kentaro Ishida

Hiroyuki Tanaka

Tetsuya Nakamura

Ken Takahashi

Katsuhiko Kohyama

Akihito Giga

Tadashi Nishiyama

Yosuke Fujii

Masahiro Mohri

Takaki Nakagawa

Hiroshi Shinkai

Takuro Okubo

Kazuo Nunokawa

Ryugo Suzuki

Masahiko Sato

Shigeru Inai

Hiromichi Yoshida

Suguru Ohmori

Satoshi Oyama

Daisuke Okonogi

Naoki Yamano

Satoru Terada

Go Morimoto

Daisuke Wachi

Kazuya Sasamoto

So Fujiwara

Yasuhiro Watanabe

Takahiro Hayashi

Manabu Tanaka

Masaaki Sakano

Masaru Oda

Masanori Hayashi

Makoto Tsuji

Teruyuki Ohtani

Kenichi Murakami

Yukihito Tanaka

Minoru Uoshima

Masao Utsunomiya

Hiroshi Morikawa

Kenta Watanabe

Masaaki Nanaumi

Kimiharu Mizusaki

Toshiya Wakahoi

Eri Terada

Mikihiko Kimura

Toshiki Kawamura

Yoshihiro Nakanishi

Tsuyoshi Kobayashi

Takahiro Takai

Kosuke Takagi

Takashi Kosaka

Takahiro Yoshida

Takeshi Masaka

Shotaro Koga

Nobuyoshi Muromoto

Hayato Kaji

Minoru Koshinuma

Takaaki Mitsuoka

Hiroaki Ota

Keisuke Suda

Takahiro Takeshita

Tamio Inamura

Masayuki Katsuno

Keisuke Ando

Toshinobu Mito

Shohei Toyota

Yusuke Okabe

Gen Okiyama

Natsuki Anzai

Ryu Okano

Takeo Abe

Yuya Sato

Masahiro Mouri

Hiroyuki Shirokawa

Satomi Yogo

Yoshio Kajita

A metal separator is stacked on each of both surfaces of a membrane electrode assembly to form a fuel cell. A method of producing the metal separator includes a metal plate processing step of producing a metal plate including a fluid passage and a fluid flow field, and a rubber adding step of adhering a plurality of rubber extension parts extending from the fluid passage toward the fluid flow field, to the metal plate. In the rubber adding step, a primer is coated on the metal plate in an island pattern, and the metal plate and the rubber extension parts are adhered together through the primer in a dot pattern.

Metal separator, fuel cell, and method of producing metal separator

Each of a fuel cell and a fuel cell stack includes an anode discharge passage connected to one end of a fuel gas flow field in the horizontal direction and configured to discharge a fuel gas in a stacking direction in which a membrane electrode assembly and separators are stacked, and a cathode discharge passage connected to another end of an oxygen-containing gas flow field in the horizontal direction and configured to discharge an oxygen-containing gas in the stacking direction. A bottom portion of a lowermost cathode discharge passage is provided below a bottom portion of a lowermost anode discharge passage.

Fuel cell and fuel cell stack

A first separator member forming a power generation cell, which is a fuel cell, includes a first separator body. A first support bead, which is formed to be lower in height than a first seal bead and restricts the inclination of the first seal bead, is provided outside a first seal in the first separator body. The width of the first support bead varies depending on the position of the first support bead in the direction in which the first support bead extends.

Separator member and fuel cell

A coolant flow field of a fuel cell stack includes a power-generation-portion-cooling flow path including a portion overlapping a power generation section of a membrane electrode assembly, a bypass flow path provided on outer peripheries of separators, a main supply flow path extending from a coolant supply passage through the bypass flow path and communicating with the power-generation-portion-cooling flow path, and a bubble release flow path extending from an upper portion of the coolant supply passage in the gravity direction toward the bypass flow path and communicating with the bypass flow path, wherein the bubble release flow path extends upward in the gravity direction above the coolant supply passage.

Fuel cell stack

A fuel cell separator member of a fuel cell stack includes a metal separator on which a seal bead is formed, and a pressure receiving member provided on a surface of the metal separator, separately from the metal separator. The pressure receiving member is provided along a seal bead, and the height of the pressure receiving member is lower than the height of the seal bead in the state where the tightening load is applied and no impact load is applied.

Fuel cell separator member and fuel cell stack

Bead seal structure includes an outer bead (bead seal) for preventing leakage of fluid, and a first bypass stop protrusion (intersecting element) which intersects with the outer bead. The first bypass stop protrusion includes a root as a rising start point from a base plate and side walls which rise from the base plate. The radius of curvature of connection parts of the roots connected to the outer bead is larger than the radius of curvature of connection parts of the side walls connected to the outer bead.

Seal structure

A method of manufacturing a plate with an insulating frame by using a metal mold. The plate includes an outer edge portion having a concavo-concave shape, and the metal mold includes a plurality of gate portions for injecting a molding material that forms the frame. The gate portions of the metal mold are at locations that correspond to the concave portions of the metal plate such that when the molding material is injected into the metal mold, an injection pressure of the molding material that can deform the metal plate will not deform the metal plate to an extent that deteriorates insulation resistance that is provided by the frame.

Method of manufacturing plate with frame

A separator member of a fuel cell stack includes a load receiver in a form of a plate. The load receiver is joined to a first separator in a manner that the load receiver protrudes outward from an outer peripheral portion of the first separator. The load receiver is formed asymmetrically about a central line passing through the center of the load receiver in the width direction and extending in the protruding direction of the load receiver.

A joint line includes a passage joint line, a first outer joint line provided in outer peripheral portions of a first metal separator and a second metal separator, and a second outer joint line provided in the outer peripheral portions of the first metal separator and the second metal separator around the first outer joint line.

Joint separator for fuel cell, and fuel cell stack

A first sealing member includes a first flat sealing portion facing a first electrode, a second flat sealing portion, and a first protruding sealing portion. The second flat sealing portion is opposite to the first electrode in the stacking direction. The first protruding sealing portion protrudes from the second flat sealing portion in the stacking direction and includes a crossing portion at which the first protruding sealing portion diverges. A second sealing member includes a third flat sealing portion facing a second electrode, a second protruding sealing portion, and a block-shaped seal. The second protruding sealing portion protrudes from the third flat sealing portion in the stacking direction. The block-shaped seal is disposed in a region corresponding to the crossing portion viewed in a stacking direction and protruding from the third flat sealing portion apart from the second protruding sealing portion.

Fuel cell

A unit cell that constitutes a fuel cell stack is obtained by sandwiching an electrolyte mem-brane/electrode structure with a cathode-side separator and an anode-side separator. A first resin member is provided along the entire periphery of the cathode-side separator in the outer peripheral portion of the cathode-side separator. Surfaces of the cathode-side separator are provided with sealing parts that cover a part of the first resin member and constitute a first sealing member.

Separator for fuel cells and method for producing same

A separator supporting structure includes a metal lug provided on a separator, a set of protrusions that protrude from an inner surface of a metal casing toward the separator to form a recess into which the lug is inserted, a first insulating portion covering the lug at least in the recess, and a second insulating portion extending from the first insulating portion and between the separator and each of the protrusions.

Separator supporting structure

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.

A fuel cell includes a power generation unit. A first resin frame member is provided in an outer portion of a first membrane electrode assembly of the power generation unit. The first metal separator has a heating portion subjected to spot heating from a surface of the first metal separator for allowing the first resin frame member to be melted partially. The first metal separator and the first membrane electrode assembly are welded together by a plurality of welding portions to form a first structural body.

A fuel cell stack includes a plurality of power generation units, a reactant gas channel, and a coolant channel. The plurality of power generation units are stacked in a stacking direction to provide a stacked body and each includes a first separator, a first electrolyte electrode assembly, a second separator, a second electrolyte electrode assembly, and a third separator. The first electrolyte electrode assembly is provided on the first separator. The second separator is provided on the first electrolyte electrode assembly. The second electrolyte electrode assembly is provided on the second separator. The first electrolyte electrode assembly and the second electrolyte electrode assembly each include an electrolyte and a pair of electrodes sandwiching the electrolyte therebetween. The third separator is provided on the second electrolyte electrode assembly.

Growing community of inventors

Utsunomiya, Japan

Shuhei Goto