Waste heat utilization system for electric vehicle

Abstract

The invention relates to a waste heat utilization system for an electric vehicle. The system may include an electric motor and a battery, and an air conditioning circuit, wherein a working medium maycirculate in the air conditioning circuit. The air conditioning circuit comprises a compressor, a condenser, and an evaporator. The system may also include a cooling circuit for cooling at least one of the electric motor and the battery, wherein a coolant may circulate in the cooling circuit. In the cooling circuit, the electric motor arranged in a first branch of the cooling circuit, the batteryarranged in a second branch fluidically connected in parallel with the first branch, a first heat exchanger for discharging heat from the coolant into surroundings of the waste heat utilization system, a first delivery device for driving the coolant in the cooling circuit, a first chiller via which heat may be transferrable from the first branch into the air conditioning circuit, and a second chiller via which heat may be transferrable from the second branch into the air conditioning circuit are arranged. The system may further include a heating circuit, in which a heating medium circulates, and in which a second delivery device and a second heat exchanger may be arranged. The condense may be an indirect heat exchanger via which heat is transferrable from the air conditioning circuit intothe heating circuit.

Description

technical field [0001] The present invention relates to a waste heat utilization system for an electric vehicle, and to an electric vehicle having such a waste heat utilization system. Background technique [0002] In electric vehicles, ie in electrically driven vehicles, a rechargeable battery present for driving the electric motor is used to supply the various auxiliary units, ie the consumers, with electrical energy. Since the waste heat generated by the internal combustion engine is not available in electric vehicles to heat the vehicle interior, electrically operated heating devices are required which likewise draw the electrical power required for operation from the battery of the electric vehicle. However, electrical energy is no longer available to drive the electric motor, which can significantly reduce the range of the electric vehicle. Contents of the invention [0003] It is therefore the object of the present invention to create a waste heat utilization syste...

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