Toyota Jidosha Kabushiki Kaisha

Sho Usami

Yasushi Araki

Norihiko Nakamura

Tomohiro Ogawa

Hiromichi Sato

Kazunori Shibata

Shuya Kawahara

Yuichi Yagami

Takashi Kajiwara

Makoto Ueno

Koro Fujio

Seiji Sano

Yoshifumi Ota

Fumihiko Inui

Masashi Maeda

Megumi Yaegashi

An inspection method for inspecting a fuel cell, comprising: rising current density at a speed of a designated speed or greater, and judging whether the fuel cell is normal or abnormal by comparing a first voltage value that is the voltage value when the current density reaches a designated current density or greater with the rising step, and a second voltage value which is a judgment standard.

Fuel cell inspection method and manufacturing method

A method of manufacturing a fuel cell which enables organic matter of both an anode thereof and a cathode thereof to be removed efficiently is provided. A method of manufacturing a fuel cell, comprising a preparation step of preparing a fuel cell comprising a stack of a plurality of unit cells, each including polymer electrolyte and a catalyst layer, and a removal step of removing organic matter from the fuel cell, is provided. This removal step comprises: a first step of maintaining a voltage of the fuel cell at 0 V so as to desorb organic matter from the catalyst layer; a second step of raising a temperature inside the fuel cell so as to evaporate the desorbed organic matter; and a third step of exhausting the evaporated organic matter from the fuel cell.

Method of manufacturing fuel cell

A fuel cell system, including: a fuel cell having at least one combination of an electrolyte membrane and a cathode-side catalyst layer and an anode-side catalyst layer that have a plurality of pores; a control unit that operates the fuel cell such that an output current determined in accordance with an external load is output from the fuel cell; and an output current acquisition unit that acquires an output current of the fuel cell; wherein, when the control unit determines that an anode in-flowing water amount, which flows to the anode-side catalyst layer when the fuel cell continues power generation at a first output current acquired at a prescribed timing, exceeds a prescribed anode-side allowable water amount, the control unit performs current limitation control to operate the fuel cell at a second output current that is higher than the first output current, regardless of a requirement of the external load.

Fuel cell system and control method for same

A fuel cell systemremoves water retaining in a cathode catalyst layerin a fuel cell, after a start-up of the fuel celland before feed of coolant to the fuel cell

Fuel cell

In a hydrogen concentration measurement device that employs a proton conducting electrolyte membrane, more stable measurement of hydrogen concentration that is less susceptible to temperature and humidity state of measurement target gas becomes possible. A hydrogen concentration measurement device for measuring concentration of hydrogen contained in measurement target gas, including a hydrogen permeation module having an entrance electrode and an exit electrode provided with a proton conducting electrolyte membrane sandwiched therebetween, the hydrogen permeation module selectively permeating hydrogen contained in the measurement target gas to the exit electrode by having the measurement target gas introduced into the entrance electrode and also by having current flowing between the entrance electrode and the exit electrode, and concentration of hydrogen contained in the measurement target gas is calculated based on, with the target gas introduced into the entrance electrode and with the current flowing between the entrance electrode and the exit electrode, a reaching time period ranging from a predetermined start time at which the current was initially applied to a time at which time rate of change of applied voltage between the entrance electrode and the exit electrode reaches a predetermined time rate of change.

Hydrogen concentration measurement device and fuel cell system

A fuel cell system includes: a fuel cell activation portion that starts electricity generation of a fuel cell; a cooling medium passage that is provided with a pump and that is provided for passing a cooling medium through a cell-side passage for the cooling medium; and a pump control portion that stops the pump for a first predetermined period after a start of the electricity generation caused by the fuel cell activation portion at a time when a temperature of the fuel cell is a low temperature lower than or equal to a predetermined value, and that starts operating the pump after the first predetermined period elapses. The pump control portion includes a cooling medium reverse portion that alternately reverses a direction of flow of the cooling medium in the cell-side passage according to elapsed time by controlling operation of the pump after the first predetermined period elapses.

Fuel cell system and control method therefor

The separator of which the region facing the MEA is a flat includes the first electrode facing plate and the second electrode facing plate. The separator includes the reaction gas supply manifold to which the reaction gas is supplied. The first electrode facing plate includes a plurality of reaction gas supply holes formed at the end of the cell-reaction region. The intermediate plate includes a plurality of reaction gas supply path slits that forms the reaction gas supply paths, wherein each of the reaction gas supply paths has one end connected to the reaction gas supply manifold and other end connected to at least one of the plurality of reaction gas supply holes.

Fuel cell separator

A hydrogen circulation type fuel cell system equipped with an electrochemical cell executes discharging an anode off-gas with impurities being condensed toward the outside of the system at a proper timing. The fuel cell system having a circulation route so that a fuel gas containing hydrogen is supplied on the side of an anode electrode for electrochemical reaction in a fuel cell and a part or whole of an anode off-gas given from the fuel cell can be circulated on the side of the anode electrode of the fuel cell again for the electrochemical reaction, includes an electrochemical cell enabling the hydrogen in the anode off-gas flowing through the circulation route by flowing the current between electrodes to be selectively supplied on the side of the anode electrode, in which a discharge timing of discharging the anode off-gas in the inlet port electrode of the electrochemical cell toward the outside of the system is controlled based on a predetermined discharge reference determined by a correlation between electric power consumed for hydrogen transmission in the electrochemical cell and a residual hydrogen concentration in the anode off-gas discharged by a discharge unit.

Growing community of inventors

Susono, Japan

Sho Usami