Toyota Jidosha Kabushiki Kaisha

Hikaru Hasegawa

Kotaro Ikeda

Tomokazu Hayashi

Makoto Yoshida

Michihisa Mochizuki

Naohiro Asada

Nobuaki Nonoyama

Toshiaki Kusakari

Hideaki Kume

Yoshihiro Ikogi

Noriyuki Kobayashi

Provided is a fuel-cell unit cell having a first gas diffusion layer that is laid on a first surface of a membrane-electrode assembly such that an outer peripheral edge portion thereof protrudes from the first surface of the membrane-electrode assembly. At a first part of the fuel-cell unit cell: the fuel-cell unit cell has a bonding layer; between the membrane-electrode assembly and a portion of the first gas diffusion layer on an inner side from the outer peripheral edge portion thereof, the bonding layer bonds the membrane-electrode assembly and the portion together; and between a support frame and the outer peripheral edge portion of the first gas diffusion layer, between the support frame and a first separator, and/or between the support frame and a second separator, the bonding layer bonds the support frame and the outer peripheral edge portion or the separator together.

Fuel-cell unit cell

A fuel cell comprises a membrane electrode assembly configured such that electrode catalyst layers are formed on respective surfaces of an electrolyte membrane; gas diffusion layers placed on respective surfaces of the membrane electrode assembly; and a frame placed around periphery of the membrane electrode assembly. The membrane electrode assembly has a protruding portion that is configured by protruding outside of the gas diffusion layer in a state that the membrane electrode assembly is combined with the gas diffusion layers. The frame has an engagement portion that is configured to engage with the protruding portion. An adhesive layer is formed from an ultraviolet curable adhesive between the protruding portion and the engagement portion.

Fuel cell and method of manufacturing fuel cell

A fuel cell system includes a fuel cell, an impedance measuring instrument, and a control device. The control device is connected to the impedance measuring instrument. The impedance measuring instrument measures the impedance of the fuel cell according to the AC impedance method. The control device stores in advance a reference value corresponding to a reference hydrogen concentration. The control device compares the real part Z' of impedance acquired via the impedance measuring instrument against the reference value. When Z&#x2032; is equal to or greater than the reference value, the control device estimates the hydrogen concentration of the fuel cell to be equal to or less than the reference hydrogen concentration.

Apparatus for estimating fuel-cell hydrogen concentration and fuel cell system

Growing community of inventors

Sunto-gun, Japan

Hikaru Hasegawa