# US 2014/0193677 A1 · Conditioning of cabin air of an aircraft > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193677 A1 - Document ID: US20140193677A1 - Status: Published application - Kind: A1 - Application number: 14/125,512 - Filed: 2012-08-06 - Published: 2014-07-10 - Earliest claimed: 2011-08-12 - Assignees: EADS Deutschland GmbH - Inventors: Stefan Stückl - Web page: https://patentgrep.com/patent/US20140193677A1 ## CPC - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - B64D 13/00: Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space - H01M 8/04089: of gaseous reactants - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - H01M 12/08: composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type - B64D 2013/0637: {with CO2 removers} - B64D 2013/0677: {comprising on board oxygen generator systems} - B64D 2013/0688: {with means for recirculating cabin air} - B64D 2221/00: Electric power distribution systems onboard aircraft - Y02E 60/10: Energy storage using batteries - Y02E 60/50: Fuel cells - Y02T 50/50: On board measures aiming to increase energy efficiency - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The invention relates to a devise for conditioning of cabin air from a cabin space of an aircraft that has at least one lithium air battery (106), having a first feed line (101) by means of which ambient air can be delivered to the battery (106) from the environment outside the aircraft, a second feed line (102) by means of which the cabin air from the cabin space can be delivered to the battery (106), a first discharge line (103) by means of which the air from the battery (106) can be delivered into the environment outside the aircraft, a second discharge line (104) by means of which air from the battery (106) can be delivered into the cabin space, a switchable means (105) that is connected to the first (101) and the second (102) feed lines and to the first (103) and second (104) discharge lines and that can adopt a first and second switching state, and a control device (108) by means of which the switchable means (105) can be controlled depending upon a current charging state of the lithium air battery (106). ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The device according to claim 1, wherein the control device is designed and set up in such a manner that, if the current charging state of the lithium air battery is above a predetermined value, the means is switched into the first switching state, and it is only after the current charging state falls below this predetermined value that the means can be switched into the seconds switching state. ### Claim 3 (depends on 2) The device according to claim 2, wherein the predetermined value is between 0 and 90% of the maximum charging state value, in particular: 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, or 5% of the maximum charging state value. ### Claim 4 (depends on 2) The device according to claim 2, wherein the control device is designed and set up in such a manner that, as soon as the current charging state falls below the predetermined value, the means switches automatically into the second switching state. ### Claim 5 (depends on 4) The device according to claim 4, wherein switching into the second switching state occurs only if a predeterminable state of the aircraft exists. ### Claim 6 (depends on 2) The device according to claim 2, wherein the control device is designed and set up in such a manner that as soon as the current charging state falls below this predetermined value, the means can first be switched by a manual actuation of an input means into the second switching state. ### Claim 7 (depends on 1) The device according to claim 1, wherein the at least one load is an electrical motor for propelling the aircraft. ### Claim 8 (depends on 1) The device according to claim 1, wherein a compressor is connected in the first feed line, by means of which compressor a pressure at which the ambient air of the lithium air battery can be supplied can be set, in particular kept constant, and/or in that a temperature regulation device is connected in the first feed line, by means of which a temperature at which the ambient air of the lithium air battery can be supplied can be regulated, in particular kept constant. ### Claim 9 (depends on 1) The device according to claim 1, wherein the lithium air battery comprises a porous cathode and the lithium air battery is designed in such a manner that the ambient air and the cabin air can flow only through the porous cathode.