| 摘要 |
Coolant passages ( 11 a, 11 b) are provided in unit cells ( 17 a, 17 b) which form a laminate ( 170 ) of the unit cells ( 17 a, 17 b). A coolant supply manifold ( 12 ) which distributes coolant from a coolant recirculation device ( 100 ) to the coolant passages ( 11 a, 11 b), and a coolant discharge manifold ( 13 ) which recovers coolant from the coolant passage ( 11 a, 11 b) to the coolant recirculation device ( 100 ), pass through the laminate ( 170 ). The coolant supply manifold ( 12 ) and coolant discharge manifold ( 13 ) are connected by two bypass passages ( 14 a, 14 b). At low temperature, heat transfer from the high temperature parts to the low temperature parts is promoted by shutting off circulation of coolant between the coolant recirculation device ( 100 ) and the laminate ( 170 ) by a valve ( 3, 4 ), and recirculating coolant inside the fuel cell stack ( 1 ) via the bypass passages ( 14 a, 14 b).
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