Bipolar collector characterised by discrete collecting of...

Details Bipolar collector characterised by discrete collecting of... Bipolar collector characterised by discrete collecting of...

H - Electricity

01

M

H01M 8/02 (2006.01) C25B 9/04 (2006.01)

Patent

CA 2368464

The invention concerns bipolar collectors with discrete collecting of charges for a fuel cell comprising a screen (A) having good electronic conductivity and electronically conductive needles (B) through which the charges flow, said needles being placed perpendicularly to the surface of the screen separating two adjacent elements but not passing through them and embedded on either side in blind holes distributed over the surface of the screen in contact with the electrodes. The screen consisting of a polymer made conductive by addition of a conductive charge, is optionally grooved on its main surfaces so as to provide passages (D) for gas circulation or comprises pins (E) defining a space on either side of its main surfaces wherein the gases can circulate.

Collecteurs bipolaires à collecte discrète des charges pour pile à combustible comportant un écran (A) possédant une bonne conductivité électronique et des aiguilles (B) électroniquement conductrices par lesquelles s'écoulent les charges; ces aiguilles sont placées perpendiculairement à la surface de l'écran séparant deux éléments adjacents mais ne le traversent pas et sont encastrées de part et d'autre dans des trous non débouchants répartis sur la surface de l'écran en contact avec les électrodes. L'écran, constitué d'un polymère rendu conducteur par l'ajout d'une charge conductrice, est éventuellement rainuré sur ses faces principales afin de ménager des canaux (D) pour la circulation des gaz ou comporte des pions (E) définissant un espace de chaque côté des faces principales où peuvent circuler les gaz.

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