Honda Motor Co., Ltd.

Yuta Ikeda

Naoki Inoue

Tadashi Nishiyama

Kimiharu Mizusaki

Norihisa Kobayashi

Masaharu Suzuki

Kenji Nagumo

Naoki Yamano

Kentaro Ishida

Hideharu Naito

Masashi Wada

Ryo Jinba

Yoshihito Kimura

Tsuyoshi Kobayashi

Yosuke Yoshizawa

Yoshiro Ichikawa

Yoichi Fukui

In the fuel-cell stack, a bypass channel is formed between the first insulating plate and the second insulating plate. The bypass channel connects the second plate passage to the lower oxygen-containing gas discharge passage. An annular protrusion protruding toward the second plate passage is provided around the first plate passage. A lower part of an inner surface forming the first plate passage has an inclined section that is inclined upward toward the downstream of the reaction gas.

Fuel cell stack

A first power output unit connected to a first terminal plate of a fuel cell system is electrically connected to a first external connector through a first joint part at a position above a cell stack body in an outer case. The first joint part includes a tightening member for tightening the first power output unit and the first external connector together by screw tightening, and a cover covering a screw tightening part of the tightening member from below.

Fuel cell system

A fuel cell stack includes a first power output unit connected to a first terminal plate, the first power output unit including a first conductor, and a second conductor extending from the first conductor to the outside of an outer peripheral end of a first inner insulator in the state where the second conductor is placed between the first inner insulator and a first end plate. The second conductor is positioned inside of the first end plate in a stacking direction of a cell stack body.

A fuel cell system includes a stack case and an auxiliary device case. The stack case stores a stack including a power generation cell stack body including a plurality of power generation cells stacked horizontally in a stacking direction, and an insulating plate stacked at an end of the power generation cell stack body in the stacking direction. The auxiliary device case stores a fuel cell auxiliary device. The inside of the stack case and the inside of the auxiliary device case that are adjacent to each other in the stacking direction are separated by a partition wall. The partition wall has ventilation connection ports. The ventilation connection ports connect the inside of the stack case with the inside of the auxiliary device case. The insulating plate provided closer to the partition wall, than the power generation cell stack body, inside the stack case faces the ventilation connection ports.

A fuel cell stack includes a cell stack body including a plurality of stacked power generation cells together. A metal plate and an elastic seal member are overlapped with each other at a position facing a bead seal formed on an end metal separator. A support member includes a recess accommodating the metal plate. A gap is provided between an inner peripheral end of the metal plate and the recess, or between an outer peripheral end of the metal plate and the recess, for absorbing thermal expansion difference between the metal plate and the support member.

A fuel cell stack includes a stack body formed by stacking a plurality of power generation cells. A first seal line of a first metal separator and a second seal line of a second metal separator protrude in a stacking direction of the stack body in a manner to contact a resin film. An insulator is provided with a first elastic seal member which contacts a second end seal line. The width of the first elastic seal member is larger than the maximum width of the second end seal line.

At one end of a fuel cell stack in a stacking direction, an insulating plate and an end plate are provided. Further, a bypass channel connecting a reactant gas supply passage and a second reactant gas discharge passage is formed between a cell stack body and the end plate. An oxygen-containing gas supplied from a reactant gas supply passage is distributed to a first reactant gas discharge passage and the second reactant gas discharge passage in the fuel cell stack.

A first end plate that constitutes a fuel cell stack is provided with an oxidant gas supply manifold member that connects an oxidant gas inlet communication hole and a circular external pipe. The oxidant gas supply manifold member has a non-circular opening portion that communicates with the oxidant gas inlet communication hole and a circular opening portion that communicates with the circular external pipe. The non-circular opening portion is disposed within an area covered by the circular opening portion.

A fuel cell stack includes a stacked body, a first insulator and a second insulator. The stacked body includes power generation cells. The power generation cells are stacked in a stacking direction. The power generation cells include a first end power generation cell a second end power generation cell. Each of the power generation cells includes a membrane electrode assembly, a cathode separator and an anode separator. The first end power generation cell has an outermost cathode separator. The second end power generation cell has an outermost anode separator. The first insulator has a first recess in which a first heat-insulating body and a first terminal plate are accommodated. The second insulator has a second recess in which a second heat-insulating body and a second terminal plate are accommodated. A first number of first stacked heat-insulating layers is larger than a second number of second stacked heat-insulating layers.

A fuel cell stack includes a first knock pin and a second knock pin. A separator has an outer peripheral shape having first and second short sides. The separator has a first knock pin insertion hole adjacent to the first side and a second knock pin insertion hole adjacent to the second side. The first and second knock pin insertion holes have a circular shape. The first insulating plate has third and fourth knock pin insertion holes. The second insulating plate has fifth and sixth knock pin insertion holes. The first knock pin is inserted into the third and fifth knock pin insertion holes to be movable in the third and fifth knock pin insertion holes. The second knock pin is inserted into the fourth and sixth knock pin insertion holes to be movable in the fourth and sixth knock pin insertion holes.

A fuel cell stack includes a stacked body including a plurality of power generation cells stacked in a stacking direction. Insulation members and end plates are provided to sandwich the stacked body therebetween in the stacking direction. A coolant passage is provided between each of the insulation members and each of the end plates. The coolant passage includes a first coolant passage and a second coolant passage. A surface area of a region in which the first coolant passage is provided is larger than a surface area of a region in which the second coolant passage is provided. A flow rate of the coolant flowing through the first coolant passage is larger than a flow rate of the coolant flowing through the second coolant passage.

A fuel cell stack includes a stack body formed by stacking a plurality of power generation cells. At one end of the stack body, a terminal plate, an insulating member, and an end plate are stacked. At the other end of the stack body, a terminal plate, an insulating member, and an end plate are stacked. A coolant channel is formed between the insulating member and the end plate for allowing a coolant to flow along a surface of the end plate.

Growing community of inventors

Wako, Japan

Yuta Ikeda