Fuel cell and separator thereof

Details Fuel cell and separator thereof Fuel cell and separator thereof

H - Electricity

01

M

H01M 2/14 (2006.01) H01M 2/08 (2006.01) H01M 8/04 (2006.01) H01M 8/10 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2632597

A fuel cell includes a plurality of fuel cell units (21). Each fuel cell unit (21) includes an electrode assembly (22) having electrodes (30, 31) and an electrolyte (29), a pair of separators (23, 24), and gas sealing members (25, 26). At least two of the fuel cell units (21) include at least two electrode assemblies (22) and at least three separators (23, 24). In each of the separators (23, 24), reaction gas communication ports (33, 34, 36, 37) are provided. In one of the separators (23 or 24) of one of the stacked fuel cell units (21) that is located at the end in a direction of stacking, through paths (43) are formed. In one of the separators (24 or 23) of one of the stacked fuel cell units (21) that is located at the other end in the direction of stacking, reaction gas communication paths (46) are formed. Both the through paths (43) and the reaction gas communication paths (46) are formed in all separators (23, 24) that are located between two fuel cell units (21) that are located at the ends.

Pile à combustible comprenant plusieurs unités de pile à combustible (21). Chaque unité de pile à combustible (21) comprend un jeu d'électrodes (22) muni d'électrodes (30, 31) un électrolyte (29), une paire de séparateurs (23, 24) et des organes de soudage par air chaud ou à la flamme (25, 26). Au moins deux des unités de pile à combustible (21) comprennent au moins deux jeux d'électrodes (22) et au moins trois séparateurs (23, 24). Dans chacun des séparateurs (23, 24) se trouvent des orifices de communication du gaz de réaction (33, 34, 36, 37). Dans l'un des séparateurs (23 ou 24) de l'une des unités de pile à combustible assemblées (21) située à l'extrémité, dans la direction de l'assemblage, se forment des chemins traversants (43). Dans l'un des séparateurs (24 ou 23) de l'une des unités de pile à combustible assemblées (21) située à l'autre extrémité, dans la direction de l'assemblage, se forment des chemins de communication des gaz de réaction (46). Les chemins traversants (43) et les chemins de communication des gaz de réaction (46) se forment dans tous les séparateurs (23, 24) situés entre les deux unités de pile à combustible (21) qui sont aux deux extrémités.

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