Method for determining a polarization curve of a fuel cell system, and method for operating a fuel cell system and fuel cell system

摘要

The invention relates to a method for determining a polarization curve (18) describing a voltage-current dependency of a fuel cell system in which value pairs (16, 17) are formed from measured values of the voltage (12) and of the current (14) acquired at the same time and in which an approximating function is used, by means of which the polarization curve (18) is determined as a function of at least one selection of the value pairs (16, 17), the non-linear function being used as the approximating function whose coefficients are used to determine the polarization curve (18) can be determined. Furthermore, the invention relates to a method for operating a fuel cell system and a fuel cell system.