Honda Motor Co., Ltd.

Yuichi Hori

Tomotsugu Takahashi

Kei Matsumoto

Seitaro Nakamura

Kazuhide Matsuo

Shunsuke Konishi

Hidetoshi Utsumi

Mai Yokoi

Satoshi Yonezawa

Takehiro Mugishima

Satoshi Aoki

Hodaka Tsuge

Nobuyoshi Muromoto

Yasuro Katsuyama

Tomoko Tamai

Takehiro Fukushima

A voltage applying unit of a water detecting device applies, to a pair of electrodes, a voltage changing within an application range that includes a first voltage which is smaller than an electrolysis voltage of water and a second voltage which is larger than the electrolysis voltage of the water. A judging unit judges presence or absence of the water based on change in electric current measured by a current measuring unit when the voltage changing within the application range is applied to the pair of electrodes.

Water detecting device and method of water detection

A progressive pressing method includes: a first bead molding step of molding a first bead having a length of a second predetermined distance extending in a longitudinal direction of the elongated metal plate, in a side part of a region which becomes a first product part of the elongated metal plate; a first conveying step of conveying the elongated metal plate in the longitudinal direction by a feed amount which is a first predetermined distance; and a second bead molding step of molding a second bead having a length of the second predetermined distance extending in the longitudinal direction of the elongated metal plate, so as to link with the first bead molded in the first bead molding step, in a side part of a region which becomes a second product part of the elongated metal plate, in which the second predetermined distance is longer than the first predetermined distance.

Progressive pressing method, progressive pressing device, manufacturing method for fuel cell separators and manufacturing apparatus for fuel cell separators

In a manufacturing method for fuel cell separators having a seal part of convex shape that is pushed when superimposed with another separator, the method includes: a first pressing step of imparting work hardening to an entire region to become a convex shape configuring the seal part; and a second pressing step of press molding the region work hardened in the first pressing step so as to become a convex shape.

Manufacturing method for fuel cell separator, and manufacturing apparatus for fuel cell separator

In a progressive pressing device, a first state of a lifting part is a state not sandwiching an elongated metal plate between a lifting plate and an upper plate in a state in which a positioning pin and a positioning hole are not engaged, a second state is a state not sandwiching an elongated metal plate between a lifting plate and an upper plate in a state in which a positioning pin and a positioning hole are engaged, and a third state is a state sandwiching an elongated metal plate between a lifting plate and an upper plate in a state in which a positioning pin and a positioning hole are engaged.

Progressive pressing device and manufacturing apparatus for fuel cell separators

A manufacturing method for fuel cell separators by way of a progressive pressing method which molds a plurality of separator shaped parts in an elongated metal plate, the method having: a pressing step of forming a separator shaped part in an elongated metal plate by way of pressing; a trimming step of cutting loose the separator shaped part from the elongated metal plate by punching an outer peripheral part of the separator shaped part formed in the elongated metal plate in the same pressing direction as the pressing step; a lifting step of lifting up the elongated metal plate from which the separator shaped part was cut loose; and a separator shaped part conveying step of conveying the separator shaped part which was cut loose to a downstream side in the conveying direction, in the midst of the elongated metal plate being lifted up in the lifting step.

Manufacturing method for fuel cell separators and manufacturing apparatus for fuel cell separators

A method for manufacturing a carbon fiber sheet, the method including a carbon fiber forming step of heating a resin sheet to a carbonization temperature at a heating rate of 15,000&#xb0; C./sec or higher, thereby forming a carbon fiber from the resin sheet. In the carbon fiber forming step, the resin sheet is preferably irradiated with an energy ray having an output density of 130 W/mmor higher and an amount of irradiation energy of 0.05 J/mmor more.

Carbon fiber sheet and method for manufacturing carbon fiber sheet

To provide a method for producing a fuel cell membrane electrode assembly that can prevent the required catalyst layer from being removed, while suppressing damage to the electrolyte membrane. A method for producing a fuel cell membrane electrode assembly MEA includes: a step of bonding a polymer electrolyte membrane PEM and a first catalyst layer-including substrate GDE; a step of making a cut CL so that the first catalyst layer-including substrate GDE bonded with the polymer electrolyte membrane PEM becomes a predetermined shape; a step of peeling an unwanted portion GDEof the first catalyst layer-including substrate GDEfrom the polymer electrolyte membrane PEM; a step of irradiating a laser beam LBpenetrating the polymer electrolyte membrane PEM without penetrating the first catalyst layer-including substrate GDEonto the polymer electrolyte membrane PEM, and removing residue RD of the first catalyst layer-including substrate GDEadhering on the polymer electrolyte membrane PEM.

Method for producing fuel cell membrane electrode assembly

A method for producing a fuel cell membrane electrode assembly includes: a step of bonding a polymer electrolyte membrane and a first catalyst layer-including substrate; a step of making a cut by way of a laser beam so that the first catalyst layer-including substrate bonded with the polymer electrolyte membrane becomes a predetermined shape; a step of peeling an unwanted portion of the first catalyst layer-including substrate from the polymer electrolyte membrane; and a step of forming a second catalyst layer on the other face of the polymer electrolyte membrane, and punching out the polymer electrolyte membrane and second catalyst layer so that the first catalyst layer-including substrate of the predetermined shape bonded on one face is surrounded, in which the laser beam has a wavelength that penetrates the polymer electrolyte membrane without penetrating the first catalyst layer-including substrate.

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Tochigi, Japan

Yuichi Hori