Method for avoiding critical operating conditions of a liquid tank device and liquid tank device

A liquid tank device, comprising:

• a tank housing for storing a liquid, consisting of water, within a tank volume inside of the tank housing,
• wherein the tank housing comprises at least one conduit opening that can be connected in a liquid-tight manner to at least one conduit for the liquid such that the liquid can be supplied to or removed from the tank volume within the tank housing through the conduit opening,
• wherein the liquid tank device comprises a tilt detection device that is fixedly positioned with respect to the tank housing for detecting a tilting of the tank housing, and
• wherein the tilt detection device is operatively connected with a closing device with which the tank volume is shut off from the at least one conduit in order to avoid further flow of liquid into or from the tank volume through the at least one conduit after detecting the tilting of the tank housing;
• wherein the tank housing comprises at least one additional opening that is not connected with the at least one conduit, wherein a second closing device is arranged at the tank housing that is actuated to close the at least one additional opening in the tank housing that is not connected with the at least one conduit after detecting tilting of the tank housing.