Toyota Jidosha Kabushiki Kaisha

Go Tejima

Hiroshi Suzuki

Tomoaki Nakashima

Ryo Akagawa

Hiroyuki Imanishi

Kota Manabe

Yoshiaki Naganuma

Tomoya Ogawa

Hironori Noto

Nobuo Yodoshi

A fuel cell includes a catalyst layer containing a polymer electrolyte and catalyst-carrying carbon. A value of an initial weight ratio of the polymer electrolyte to the catalyst-carrying carbon in the catalyst layer is set to a value that is smaller by 0.1 to 0.2 than a value of a weight ratio of the polymer electrolyte to the catalyst-carrying carbon in the catalyst layer which maximizes a maximum output of the fuel cell in a state where the polymer electrolyte is not swollen.

Fuel cell and moving body

There is disclosed a fuel cell system or the like capable of sufficiently reducing an exhaust hydrogen concentration even in a case where a fuel cell is operated in a state of a low power generation efficiency. A bypass valve is arranged between an oxidation gas supply path and a cathode-off gas channel. In a state in which supply of an oxidation gas to a cathode falls short, pumping hydrogen is included in a cathode-off gas. Therefore, a valve open degree of the bypass valve is regulated, and a flow rate of bypass air is regulated to control the exhaust hydrogen concentration.

Fuel cell system, estimation device of amount of anode gas to be generated and estimation method of amount of anode gas to be generated

A fuel cell system has produced water amount detection means that detects the amount of water produced in the fuel cell during low-efficiency operation of the system and gas supply limitation means that limits the amount of gas to be supplied to the fuel cell, based on the detected amount of water. The produced water amount detection means allows the amount of produced water to be correctly determined during low-efficiency operation of the fuel cell, thereby enabling the appropriate warm-up, and inhibits a condition, in which the amount of produced water is too large and warm up operation is hindered, to be generated. As a result, the amount of water produced during low-efficiency operation of the fuel cell is correctly determined and the appropriate warm-up is enabled.

Fuel cell system, control method therefor, and movable body

A process of disassembling a fuel cellsupplies a fluid to both a fuel gas conduitand an oxidizing gas conduit. Since outlets of the respective gas conduitsandare shielded, the internal pressure or in-passage pressure of the respective gas conduitsandgradually rises and eventually exceeds a specific in-passage pressure level for power generation of the fuel cell. The high in-passage pressure expands a gas diffusion electrodeof a membrane electrode assembly (MEA)and a separator, which define the fuel gas conduit, in opposite directions to make a clearance between the gas diffusion electrodeand the separator. Similarly the high in-passage pressure expands a gas diffusion electrodeof the MEAand a separator, which define the oxidizing gas conduit, in opposite directions to make a clearance between the gas diffusion electrodeand the separator. The supplied fluid then flows out through these clearances into seals between the separatorsandand the MEA. These flows raise the in-passage pressure and release the seals.

Fuel cell disassembly method and fuel cell

Respective heatersthroughreceive power supply and start heating. The heatersthroughkeep heating sealing layersto or over a softening temperature at which the sealing layersare softened or molten. After the sealing layersare softened or molten to weaken the adhesive force between a pair of separatorsand, the heatersthroughare detached from a fuel cell. The worker then completely separates the pair of separatorsandfrom each other with some tool or by hand and removes an MEAfrom the fuel cell

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Toyota, Japan

Go Tejima