FUEL CELL STACK AND OPERATING METHOD THEREOF

摘要

A fuel cell stack (10) includes a first sub-stack (12), a second sub-stack (14), and a third sub-stack (16) disposed in the flow direction of an oxidizing gas. An intermediate plate (18a) is interposed between the first and second sub-stacks (12, 14), and an intermediate plate (18b) is interposed between the second and third sub-stacks (14, 16). The first sub-stack (12) has a specific number of cell assemblies (20a), a specific number of cell assemblies (20b), and a specific number of cell assemblies (20c). These cell assemblies (20a, 20b, 20c) are stacked to each other in the direction X. In this fuel stack (10), the flow of an oxidizing gas is set such that the oxidizing gas flows in series in the direction from the first sub-stack (12) to the third sub-stack (16).