METHOD FOR PREVENTING LOCAL OVERHEATING IN A FUEL CELL ARRANGEMENT AND FUEL CELL SYSTEM HAVING SUCH A FUEL CELL ARRANGEMENT

摘要

In a fuel cell arrangement (2) through which a fluid coolant flows for cooling, the pressure of the coolant is monitored according to the invention on achieving or falling below the predetermined threshold value after flowing through the fuel cell arrangement (2), wherein the threshold value is greater than the boiling balance pressure of the coolant. Upon achieving or falling below the boiling balance pressure there is a risk of the formation of vapor film, and thus local overheating ('hot spot') in the fuel cells (3). Damage to the fuel cell arrangement (2) due to such a local overheating can be reliably avoided by monitoring the pressure of the coolant.