Device for cooling drive components and heating a passenger compartment of an electric vehicle

Device for cooling drive components and heating a passenger compartment of an electric vehicle having a battery-fed drive motor, the battery and further drive components being integrated within a first coolant circuit which is coupled by means of an intermediate heat exchanger to a second coolant circuit comprising at least one first heat exchanger, acting as a cooling element, and a second heat exchanger, acting as a heating element, and a coolant pump, and the first and second heat exchanger being assigned a respective fan, characterized in that the first and second heat exchangers (6, 7) are provided in the second coolant circuit (5) with a respective controllable bypass (66, 67), and in that an electronic control unit (10) containing a microprocessor is present, to which there are connected up, on the input side, a desired-value setter (11), an interior-temperature detector (37) for the heating output and a coolant-temperature detector (12), and to which the following signals derived from the battery control unit:

• discharge clearance (13)
• mains connection (charging mechanism) (14)
• charge state (15) and
• battery temperature (16) are fed, and the electronic control unit (10) is connected on the output side to adjusting and drive means (17, 19, 21, 23, 25) for the heat exchanger bypasses (66, 67), the coolant pump (26), the fans (22).