Solid oxide fuel cell stack assembly for direct injection of...

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 4/86 (2006.01) H01M 8/06 (2006.01) H01M 8/10 (2006.01) H01M 8/12 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2484220

An electrochemical system includes a stack (12) of cells (10) along a centerline (14). The cells (10) surround a fuel mixing chamber (18) and an oxidizing chamber (38) surrounds the stack (12). Separator discs (22a) and (22b) separate the cells (10). Each cell includes a solid oxide electrolyte (24) fuel electrode (26) and oxygen electrode (32). Gas diffusion layers (28) and (30) are provided to the electrodes. Unsealed fuel flow layers (40) and (42) are provided adjacent respective end plates (44) and (46) to allow fuel gas to exit the stack (12). The stack further includes a thermal insulation unit (48) having a fuel feed tube (50) disposed therein and sealed via a sealing tube (52) and disc (54).

Un système électrochimique comprend un assemblage (12) de cellules (10) le long d'une ligne médiane (14). Les cellules (10) entourent une chambre de mélange (18) de combustible et une chambre d'oxydation (38) entoure l'assemblage (12). Des disques séparateurs (22a et 22b) séparent les cellules (10). Chaque cellule comprend un électrolyte à oxyde solide (24), une électrode à combustible (26) et une électrode à oxygène (32). Des couches de diffusion de gaz (28 et 30) équipent les électrodes. Des couches d'écoulement de combustible non hermétiques (40 et 42) sont ménagées adjacentes aux plaques terminales respectives (44 et 46) pour permettre que le gaz combustible sorte de l'assemblage (12). L'assemblage comprend également une unité d'isolation thermique (48) dans laquelle est disposé un tube (50) d'alimentation en combustible et laquelle est fermée hermétiquement par un tube (52) et un disque (54) d'étanchéité.

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