Honda Motor Co., Ltd.

So Fujiwara

Ken Takahashi

Narutoshi Sugita

Shuhei Goto

Katsuhiko Kohyama

Ryugo Suzuki

Seiji Sugiura

Hideharu Naito

Masaharu Suzuki

Masahiro Matsutani

Kazuyoshi Miyajima

Kazuo Nunokawa

Nariyuki Yoshinaga

Yohei Hidaka

Kaoru Fukui

Satoshi Iitaka

An end plate of a fuel cell stack is directly fixed to a humidifier. A resin pipe is attached to an oxygen-containing gas outlet of an end plate through a resin coupling pipe. The resin pipe includes one end having a large diameter and the other end having a small diameter. The other end is provided at an off gas supply channel of the humidifier. The off gas supply channel includes an inclined channel. The other end extends up to an end of the inclined channel where inclination of the inclined channel is started. An off gas ejection port is formed at the other end. The off gas ejection port is opened to the end of the inclined channel where inclination is started. Condensed water returned along the inclined channel flows from the off gas ejection port into the resin pipe.

Fuel cell stack coupled to a humidifier via an inclined channel

A fuel cell stack includes a plurality of power generation cells stacked in a direction of gravity. In a cathode side separator of the power generation cell, an oxygen-containing gas discharge passage is connected to an oxygen-containing gas flow field, and a water guide member is provided for the oxygen-containing gas discharge passage for allowing condensed water to be directly dropped in the direction of gravity along the oxygen-containing gas discharge passage. The water guide member is a plate member protruding into the oxygen-containing gas discharge passage and inclined toward the direction of gravity.

Fuel cell stack

A fuel cell includes a membrane electrode assembly, and first and second separators. A first insulating bushing is attached to a first positioning hole of a first separator, and a second insulating bushing is attached to a second positioning hole of the second separator. An inner wall of the first insulating bushing is fitted to an outer wall of the second insulating bushing for positioning the first and second separators such that the first and second separators are insulated from each other.

Fuel cell

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Yaita, Japan

So Fujiwara