NOVELTY - Controlling the passenger compartment temperature of an electrically operated vehicle which has a battery (26) comprises provision of an air conditioning system (10) with a coolant circuit (14); thermal coupling of the coolant circuit (14) to the battery (26) in such a way that the battery (26) forms a heat accumulator of the coolant circuit (14); and optional cooling or heating of the battery (26) while the battery (26) is coupled to an electric charging station for charging the battery (26).    USE - The method is used for controlling the passenger compartment temperature of an electrically operated vehicle (claimed).    ADVANTAGE - The method and an air-conditioning system for an electrically operated vehicle permits the passenger compartment temperature to be controlled by means of the air-conditioning system with low additional energy demand during operation of the vehicle. The range of the electrically operated vehicle is therefore to be reduced as little as possible by the activation of the air-conditioning system. The battery performs its functions both as an accumulator for electrical energy and as an accumulator for thermal energy which can be used to operate the air-conditioning system. Neither additional installation space nor additional weight is required for the heat accumulator.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is air conditioning system (10) for an electrically operated vehicle, having a coolant circuit (14) which has a compressor (16), a radiator, in particular in the form of a vaporizer (22), and a heating device, in particular in the form of a condenser (18), where a vehicle battery (26) is thermally coupled directly or indirectly via a heat exchanger (28) assigned thereto to the coolant circuit (14) in such a way that the coolant circuit (14) optionally cools or heats the battery (26), or heat from the battery (26) can be fed into the coolant circuit (14).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an air-conditioning system.    Air conditioning system (10)    Coolant circuit (14)    Vaporizer (22)    Battery (26)    Heat exchangers (28, 32, 34)    Temperature sensor (29)