Method for controlling a drying process of a fuel cell system

A method for controlling a drying process of a fuel cell system (100) during shutdown of the fuel cell system (100) in preparation for a start of the fuel cell system (100), said method

• comprising the following steps:
• initiating a drying process of the fuel cell system (100),
• setting at least one operating parameter (i, ii, iii) in at least one functional system (1, 2, 3, 4) of the fuel cell system (100) to a constant level,
• monitoring at least one outlet temperature (TCathOut, TAnodOut) from a stack (101) of the fuel cell system (100) in at least one functional system (1, 2, 3, 4) of the fuel cell system (100),
• evaluating the at least one outlet temperature (TCathOut, TAnodOut),
• determining a termination time (tdryEnd) for ending the drying operation in accordance with the evaluation;
• and wherein when monitoring the at least one outlet temperature (TCathOut, TAnodOut), an outlet temperature (TCathOut) in a cathode system (1) and an outlet temperature (TAnodOut) in an anode system (3) of the fuel cell system (100) are sensed,
• an undershooting of a threshold value (tdryEndEvalAnod, tdry EndEvalCath) at a later time is considered as a termination condition when determining the termination time (tdryEnd) for ending the drying process, and/or—after a threshold value (tdry EndEvalAnod, tdry EndEvalCath) has been undershot for the first time, a predefined waiting time (twaitforSecond) is set which can elapse at most until the drying process is terminated in order to wait for a threshold value (tdry EndEvalAnod, tdry EndEvalCath) to be undershot at a later time.