DEVICE AND METHOD FOR DETERMINING THE CONDUCTIVITY OF A COOLING MEDIUM OF A FUEL CELL SYSTEM

摘要

The invention relates to a device for determining the conductivity of a cooling medium of a fuel cell system. Said device comprises a fuel cell (1) that is penetrated by the cooling medium and is provided with electrical poles (2, 3) and a rectifier (4) which is electrically connected to said poles (2, 3) and is used for converting the direct current generated by the fuel cell (1) into alternating current. Parts of the fuel cell (1) which are in contact at least with the cooling medium are connected to an identical electrical frame terminal (5) for equipotential bonding. According to the invention, a resistance measuring element (6) is disposed between the frame terminal (5) and one of the two poles (2, 3) of the fuel cell (1) in order to determine the conductivity of the cooling medium.