Method for operating an electrochemical device, open-loop or closed-loop control device, and electrochemical device

A method for operating an electrochemical device including a fuel cell device, the method comprising the following steps:

• measuring at least one operating parameter and at least one further operating parameter, which is different from the operating parameter, for open-loop or closed-loop control of the electrochemical device;
• and
• determining that a steady operating state of the electrochemical device has been reached, wherein a time profile of an individual, operating characteristic variable combining the at least one operating parameter and the at least one further operating parameter is evaluated in order to identify that the steady operating state has been reached.

An open-loop or closed-loop control device for an electrochemical device, the control device configured to operate the electrochemical device, the electrochemical device including a fuel cell device, the control device configured to:

• measure at least one operating parameter and at least one further operating parameter, which is different from the operating parameter, for open-loop or closed-loop control of the electrochemical device;
• and
• determine that a steady operating state of the electrochemical device has been reached, wherein a time profile of an individual, operating characteristic variable combining the at least one operating parameter and the at least one further operating parameter is evaluated in order to identify that the steady operating state has been reached.