US 10,875,382 B2Granted

Waste heat utilization system for an electric vehicle

AssigneeMahle International GmbH

InventorsFahmi Ben Ahmed, Matthias Jung, Sascha Lindauer, Hans-Ulrich Steurer

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Abstract

A waste heat utilization system for an electric vehicle having an electric motor and a battery may include a first cooling circuit in which a first coolant circulates and having arranged therein the electric motor, a first direct heat exchanger for discharging heat from the first coolant into surroundings of the system, and a first delivery device for driving the first coolant. The system may also include a second cooling circuit in which a second coolant circulates and having arranged therein the battery and a second delivery device for driving the second coolant. The system may also include an air conditioning circuit in which a working medium circulates, and having arranged therein a compressor, condenser, and evaporator. The system may further include first and second chillers by which heat may be transferrable from the first and second cooling circuits into the air conditioning circuit, and first and second heat exchangers incorporated in one of the first and second cooling circuits for discharging heat into the surroundings.

Claims20

Dependent claims

A waste heat utilization system for an electric vehicle, which includes an electric motor for driving the electric vehicle and a battery for supplying the electric motor with electric energy, comprising:

a first cooling circuit for cooling the electric motor, wherein in the first cooling circuit during operation of the waste heat utilization system a first coolant circulates, and wherein in the first cooling circuit are arranged:
the electric motor;
a first heat exchanger for discharging heat from the first coolant to outside of the waste heat utilization system;
and
a first coolant driver;
a second cooling circuit for cooling the battery, wherein in the second cooling circuit during the operation of the waste heat utilization system a second coolant circulates, and wherein in the second cooling circuit are arranged:
the battery;
a second heat exchanger for discharging heat from the second coolant to outside of the waste heat utilization system;
and
a second coolant driver;
an air conditioning circuit for air conditioning a vehicle interior of the electric vehicle, wherein in the air conditioning circuit during the operation of the waste heat utilization system a working medium circulates, and wherein in the air conditioning circuit are arranged:
a compressor for compressing the working medium;
a condenser for condensing the working medium;
and
an evaporator for evaporating the working medium;
a first chiller configured to transfer heat from the first cooling circuit into the air conditioning circuit;
and
a second chiller configured to transfer heat from the second cooling circuit into the air conditioning circuit.

15 more elements

An electric vehicle, comprising;

an electric motor and a battery for supplying the electric motor with electric energy;
and
a waste heat utilization system operatively connected with at least one of the electric motor and the battery for discharging waste heat, the waste heat utilization system:
a first cooling circuit for cooling the electric motor, wherein in the first cooling circuit during operation of the waste heat utilization system a first coolant circulates, and wherein in the first cooling circuit are arranged:
the electric motor;
a first heat exchanger for discharging heat from the first coolant to outside of the waste heat utilization system;
and
a first coolant driver;
a second cooling circuit for cooling the battery, wherein in the second cooling circuit during the operation of the waste heat utilization system a second coolant circulates, and wherein in the second cooling circuit are arranged:
the battery;
a second heat exchanger for discharging heat from the second coolant to outside of the waste heat utilization system;
and
a second coolant driver;
an air conditioning circuit for air conditioning a vehicle interior of the electric vehicle, wherein in the air conditioning circuit during the operation of the waste heat utilization system a working medium circulates, and wherein in the air conditioning circuit are arranged:
a compressor for compressing the working medium;
a condenser for condensing the working medium;
and
an evaporator for evaporating the working medium;
a first chiller configured to transfer heat from the first cooling circuit into the air conditioning circuit;
and
a second chiller configured to transfer heat from the second cooling circuit into the air conditioning circuit.

18 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/878,389Filed 23 Jan 2018
Priority: DE 10 2017 201 20225 Jan 2017
Published: US 2018/0208014 A126 Jul 2018
Granted: 29 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B60H 1/00392
For vehicles having an electrical drive, e.g. hybrid or fuel cell: for electric vehicles having only electric drive means
B60H 1/00885
The components being temperature regulating devices: controlling the flow of heating or cooling liquid, e.g. valves or pumps
B60H 1/00899
The components being temperature regulating devices: controlling the flow of liquid in a heat pump system
B60H 1/143
Other than from cooling liquid of the plant: the heat being derived from cooling an electric component, e.g. electric motors, electric circuits,…