Air-conditioning circuit for a hybrid motor vehicle, and method for preheating a motor vehicle battery of a hybrid motor vehicle

A hybrid motor vehicle comprising:

• a combustion engine for purely mechanical drive of the hybrid motor vehicle;
• a traction battery for purely electric drive of the hybrid motor vehicle;
• and an air-conditioning circuit for temperature control of the traction battery, the air-conditioning circuit comprising:
• a charge-air cooler for cooling charge air for a turbocharger of the combustion engine of the hybrid motor vehicle with the aid of a temperature-control medium;
• a low-temperature cooler for cooling the temperature-control medium;
• an air-conditioning condenser of an air-conditioning apparatus for air-conditioning a vehicle interior compartment of the hybrid motor vehicle with the aid of the temperature control medium;
• a temperature-control line with a heater for heating the temperature-control medium in the temperature control line for achieving a direct or indirect temperature control of the traction battery;
• pumps for pumping the temperature-control medium through the air-conditioning circuit;
• and
• valves including a 3/2 directional condenser valve, the air-conditioning condenser being connected to the low-temperature cooler and to the temperature-control line by the 3/2 directional condenser valve, the valves being disposed so that:
• in a first set of valve positions, the 3/2 directional condenser valve connects the air-conditioning condenser to the low-temperature cooler for cooling the temperature-control medium upstream of the charge air cooler thereby further cooling the charge air of the turbocharger, and the valves in the first set of valve positions form a separate circuit that connects the heater and the traction battery;
• and
• in a second set of valve positions, the 3/2 directional condenser valve connects the air-conditioning condenser in series to the heater in the temperature-control line, the traction battery, and then to low-temperature cooler by way of a recirculation check valve to form a circuit that first heats the temperature control medium in the heater for heating the traction battery and then cools the temperature control medium in the low temperature cooler for cooling the charge air.