Fuel cell assembly and method for making the same

Details Fuel cell assembly and method for making the same Fuel cell assembly and method for making the same

H - Electricity

01

M

H01M 8/00 (2006.01) H01M 8/02 (2006.01) H01M 8/04 (2006.01) H01M 8/10 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2408592

In a fuel cell assembly comprising at least one cell including an electrolyte layer, a pair of gas diffusion electrode layers interposing said electrolyte layer between them, and a pair of flow distribution plates (5) for defining passages (10, 11) for fuel and oxidizer gases that contact said gas diffusion electrode layers, a heater (62) and various sensors (61a, 61b and 61c) are formed at least one of the flow distribution plates so that the work needed for installing the heater and sensors is simplified. By embedding them in a substrate, the need for a complex sealing arrangement can be eliminated. In particular, if each flow distribution plate is formed by performing an etching process on a substrate, and forming the heater and sensors in succession to the step of forming each flow distribution plate, the installation of sensors and fabrication of the fuel call are simplified.

Dans un ensemble de piles à combustible comportant au moins pile à combustible constituée d'une couche d'électrolyte, de deux couches d'électrode à diffusion gazeuse entre lesquelles la couche d'électrolyte est intercalée, et de deux plaques (5) de distribution de flux qui définissent des passages (10, 11) pour les gaz de combustible et de comburant qui entrent en contact avec lesdites couches d'électrodes à diffusion gazeuse, un élément (62) chauffant et divers capteurs (61,a, 61b et 61c) sont formés sur au moins une des plaques de distribution de flux ce qui permet de simplifier l'opération de montage de l'élément chauffant et des capteurs. L'incorporation de ces composants dans le substrat rend les systèmes d'étanchéité complexes superflus. En formant chaque plaque de distribution de flux par un procédé de gravure d'un substrat puis en formant l'élément chauffant et les capteurs sur chaque plaque de distribution de flux juste après cette étape de gravure, on simplifie le montage des capteurs et la fabrication de la pile à combustible.

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