Toyota Shatai Kabushiki Kaisha

Michi Hashiba

Eiichiro Morozumi

Takayuki Suzuki

A separator includes a base including projections. The base is made of a metal plate. The separator includes a conductive layer arranged on a top surface of each of the projections of the base. The conductive layer includes conductive carbon materials, conductive particles, and a thermosetting resin. The conductive carbon materials and the conductive particles are dispersed in the resin and are in contact with each other over an entirety of the conductive layer in a thickness direction of the conductive layer.

Method for producing separator for fuel cells

A separator includes a base material made of metal plate and a first layer made of corrosion-resistant material and arranged on the entirety of one surface of the base material. The base material includes extending projections and extending recesses. The projections and the recesses are alternately arranged. The separator includes a second layer including a conductive particle and a binder that is made of plastic material, the second layer being arranged only on a part of a surface of the first layer corresponding to a top surface of the projections of the base material. The conductive particle is contained only in the second layer.

Fuel cell separator and method for manufacturing fuel cell separator

A separator assembly for a fuel cell includes a first separator, a second separator, and a joined portion. In the joined portion, the first separator and the second separator are joined to each other through laser welding. The first separator includes a first surface that is intended to be opposed to the membrane electrode assembly. The first surface of the first separator includes an exposed portion where the base of the first separator is exposed. The second separator includes a second surface that is intended to be opposed to the membrane electrode assembly. A film including conductive particles is arranged on the entire second surface of the second separator. The joined portion is formed by irradiating the exposed portion of the first separator with laser.

Separator assembly for fuel cell and method for manufacturing separator assembly for fuel cell

A fuel cell stack includes a plurality of power generation cells stacked and connected in series and coolant passages configured to circulate coolant. The power generation cells each include a membrane electrode assembly and two separators sandwiching the membrane electrode assembly. The separators are each formed by a metal plate. The coolant passages include through-holes extending through the separators and aligned in a stacking direction of the power generation cells. A method for manufacturing a fuel cell stack includes forming a coating of electrodeposition paint on surfaces of ones of the separators having a high electric potential in the fuel cell stack by operating the fuel cell stack and using the coolant that contains electrodeposition paint particles.

Growing community of inventors

Kariya, Japan

Michi Hashiba