Conditioning of cabin air of an aircraft

A device for operating a lithium air battery of an aircraft, by means of which at least one electrical load of the aircraft, which can be connected to the lithium air battery, can be supplied with electrical energy, and for conditioning of cabin air from a cabin space of the aircraft, with

• a first feed line, by means of which ambient air from an environment outside of the aircraft can be supplied to the lithium air battery,
• a second feed line, by means of which cabin air from the cabin space can be supplied tot he lithium air battery,
• a first discharge line, by means of which air from the lithium air battery can be supplied to the environment outside of the aircraft,
• a second discharge line, by means of which the air from the lithium air battery can be supplied to the cabin space,
• a switchable means connected to the first and to the second feed line as well as to the first and to the second discharge line, by means of which, in a first switching state of the means, the ambient air can be supplied from outside the aircraft to the lithium air battery exclusively through the first line, and, after it has flowed through the lithium air battery, it can be returned exclusively through the first discharge line to the environment, wherein, in the first switching state, the supplying of cabin air to the lithium air battery through the second feed line and the discharge of air from the lithium air battery through the second discharge line are prevented, and by means of which, in a second switching state of the means, the cabin air can be supplied to the lithium air battery exclusively through the second feed line, and, after it has flowed through the lithium air battery, it can be returned excluisvely through the second discharge line, as conditioned cabin air, to the cabin space, wherein, in the second switching sate, the supplying of the ambient air to the lithium air battery through the first feed line and the discharge of air from the lithium air battery through the first discharge line are prevented, and
• and a control device by means of which the switchable means can be controlled depending on a current charging state of the lithium air battery,
• wherein:
• the electrical load can be supplied with electrical energy by the lithium air battery only in the first switching state, and
• the conditioning of the cabin air in the second switching state as it flows through the lithium air battery occurs by carbon dioxide separation from the cabin air and by the supply of oxygen, in particular by a reaction of the cabin air with the lithium peroxide Li2O2 present in the lithium air battery.