Sofc stack with thermal compression

Details Sofc stack with thermal compression Sofc stack with thermal compression

H - Electricity

01

M

H01M 8/24 (2006.01)

Patent

CA 2431238

tA solid oxide fuel cell stack includes a thermally responsive compression element. The compression element extends between the top and bottom plates of the stack and has an overall coefficient of thermal expansion which is substantially the same or less than the composite coefficient of thermal expansion of the stack itself. The compression element may be elongated and include a lower rod, an upper sleeve and an intermediate expansion member which are concentrically arranged. The expansion member bears on shoulders formed on the lower rod and upper sleeve to provide a compressive force at elevated temperatures, if the expansion member has a higher coefficient of thermal expansion than the lower rod and upper sleeve.

Un empilement de piles électrochimiques à oxyde solide comprend un élément de compression réagissant à la chaleur. L'élément de compression s'étend entre les plaques supérieure et inférieure de l'empilement et présente un coefficient global de dilatation thermique qui est sensiblement identique ou inférieur au coefficient composite de dilatation thermique de l'empilement lui-même. L'élément de compression peut être allongé et comprendre une tige inférieure, une gaine supérieure et un élément de dilatation intermédiaire qui sont disposés de manière concentrique. L'élément de dilatation repose sur des épaulements formés sur la tige inférieure et la gaine supérieure pour assurer une force de compression à des températures élevées, si l'élément de dilatation présente un coefficient de dilatation thermique supérieur à celui de la tige inférieure et de la gaine supérieure.

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