CN115972858A

CN115972858A - Thermal management system and vehicle

Info

Publication number: CN115972858A
Application number: CN202310123246.7A
Authority: CN
Inventors: 艾芳洋; 王伟; 张东斌; 聂欢欢
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Zhaoqing Xiaopeng Intelligent Manufacturing Research Institute Co.,Ltd.
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-04-18

Abstract

The invention discloses a thermal management system and a vehicle. The heat management system comprises a compressor, a gas-liquid separator, a passenger compartment heat exchanger, a liquid cooling plate, a first heat exchanger, a second heat exchanger and a valve assembly; the compressor, the first heat exchanger, the second heat exchanger and the gas-liquid separator are sequentially connected to form a refrigerant loop; the liquid cooling plate, the second heat exchanger and the valve assembly are connected to form a battery heat exchange loop; the passenger compartment heat exchanger and the first heat exchanger are connected to form a passenger compartment heat exchange loop; the heat management system also comprises an air supplementing loop, one end of the air supplementing loop is connected with the gas-liquid separator, and the other end of the air supplementing loop is connected with the outlet of the compressor; in the low-temperature heat pump mode, the refrigerant circularly flows in the refrigerant loop and the air supplementing loop to exchange heat with the passenger compartment heat exchanger of the passenger compartment heat exchange loop and/or exchange heat with the liquid cooling plate of the battery heat exchange loop. The heat management system can meet the heating requirements of the passenger compartment and the battery under the low-temperature working condition.

Description

Thermal management system and vehicle

Technical Field

The invention relates to the technical field of thermal management, in particular to a thermal management system and a vehicle.

Background

Along with the continuous improvement of new energy automobile market share, how to reduce the energy consumption, promote passenger's comfort level, the requirement to whole car thermal management is more and more high. Under the low-temperature working condition, the PTC is started to consume a large amount of electricity for heating the passenger compartment, so that the endurance mileage is continuously reduced. In order to solve the problems of energy consumption increase and mileage decay at low temperature, the heat pump technology is gradually popularized on new energy automobiles. However, under the ultra-low temperature working condition that the environment is lower than minus 15 ℃, the existing heat pump technology cannot meet the heating requirement of a passenger compartment or a battery, needs to rely on PTC heating, and is not beneficial to cost control of a heat management system; meanwhile, the performance and reliability requirements of key parts such as PTC and the like are high, and certain quality problems and after-sale risks can be brought.

Disclosure of Invention

The embodiment of the invention provides a thermal management system and a vehicle.

The heat management system comprises a compressor, a gas-liquid separator, a passenger compartment heat exchanger, a liquid cooling plate, a first heat exchanger, a second heat exchanger and a valve assembly;

the compressor, the first heat exchanger, the second heat exchanger and the gas-liquid separator are sequentially connected to form a refrigerant loop;

the liquid cooling plate, the second heat exchanger and the valve assembly are connected to form a battery heat exchange loop;

the passenger compartment heat exchanger and the first heat exchanger are connected to form a passenger compartment heat exchange loop;

the heat management system also comprises an air supplementing loop, wherein one end of the air supplementing loop is connected with the gas-liquid separator, and the other end of the air supplementing loop is connected with an outlet of the compressor;

in the low-temperature heat pump mode, a refrigerant circularly flows in the refrigerant loop and the gas supplementing loop to exchange heat with a passenger compartment heat exchanger of the passenger compartment heat exchange loop and/or exchange heat with a liquid cooling plate of the battery heat exchange loop.

In the heat management system, the air supplementing loop is arranged, so that in a low-temperature heat pump mode, the air supplementing loop can improve the flow of the compressor, further the work capacity of the compressor is increased, the heat is not required to be heated by the PTC and other elements, and the heating requirements of the passenger compartment and the battery can be met under the low-temperature working condition.

In certain embodiments, the thermal management system further comprises an evaporator and a first heat sink;

the compressor, the first heat exchanger, the evaporator and the gas-liquid separator are sequentially connected to form a passenger compartment refrigerating circuit;

the first radiator and the first heat exchanger are connected to form a first off-board circulation loop;

in the passenger compartment refrigeration mode, refrigerant circulates in the passenger compartment refrigeration circuit to exchange heat with the first radiator of the first off-board circulation circuit.

In some embodiments, the thermal management system further comprises a second heat sink;

the second radiator, the second heat exchanger, and the valve assembly are connected to form a second off-vehicle circulation loop;

in a passenger compartment conventional heat pump heating mode, refrigerant circularly flows in the refrigerant loop to exchange heat with a second radiator of the second extra-vehicular circulation loop and exchange heat with a passenger compartment heat exchanger of the passenger compartment heat exchange loop.

In some embodiments, in the battery waste heat recovery heating mode, the refrigerant circulates in the refrigerant circuit to exchange heat with the passenger compartment heat exchanger of the passenger compartment heat exchange circuit and with the liquid cooling plate of the battery heat exchange circuit.

In certain embodiments, the thermal management system further comprises a heat exchange jacket, the heat exchange jacket and the valve assembly being connected to form an electric motor heat exchange loop;

in the motor waste heat recovery heating mode, a refrigerant circularly flows in the refrigerant loop to exchange heat with the passenger compartment heat exchanger of the passenger compartment heat exchange loop, and exchange heat with the liquid cooling plate of the battery heat exchange loop and the heat exchange sleeve of the motor heat exchange loop.

In some embodiments, the thermal management system includes a water kettle connected to the passenger compartment heat exchange loop, the battery heat exchange loop, and the electric machine heat exchange loop and configured to evacuate air and replenish the passenger compartment heat exchange loop, the battery heat exchange loop, and the electric machine heat exchange loop.

In certain embodiments, the thermal management system further comprises a first heat sink;

in a battery cooling mode, refrigerant circulates in the refrigerant loop to exchange heat with the first radiator of the first off-board circulation loop and exchange heat with the liquid cooling plate of the battery heat exchange loop.

in the battery cooling and passenger compartment refrigeration modes, a refrigerant circularly flows in the passenger compartment refrigeration loop to exchange heat with the first radiator of the first vehicle-exterior circulation loop and exchange heat with the liquid cooling plate of the battery heat exchange loop.

In some embodiments, the thermal management system further comprises an electronic fan for dissipating heat from the heat sink.

A vehicle of an embodiment of the invention comprises the thermal management system of any of the embodiments described above.

In the vehicle, the heat management system is provided with the air supplementing loop, in the low-temperature heat pump mode, the air supplementing loop can increase the flow of the compressor, so that the work load of the compressor is increased, the heat is not required to be heated by the PTC and other elements, and the heating requirements of the passenger compartment and the battery can be met under the low-temperature working condition.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is also possible for those skilled in the art to obtain other drawings based on the structures shown in the drawings without creative efforts.

FIG. 1 is a block diagram of a thermal management system according to an embodiment of the present invention;

FIG. 2 is another block diagram of a thermal management system according to an embodiment of the present invention;

FIG. 3 is a schematic view of a thermal management system according to an embodiment of the present invention in a low temperature heat pump mode;

FIG. 4 is a schematic view of a thermal management system according to an embodiment of the present invention in a passenger compartment cooling mode;

FIG. 5 is a schematic view of a thermal management system according to an embodiment of the present invention in a passenger compartment conventional heat pump heating mode;

FIG. 6 is a schematic diagram of a thermal management system in an embodiment of the present invention in a battery waste heat recovery heating mode;

FIG. 7 is a schematic diagram of a thermal management system according to an embodiment of the present invention in a motor waste heat recovery heating mode;

FIG. 8 is a schematic view of a thermal management system according to an embodiment of the present invention in a battery cooling mode;

FIG. 9 is a schematic diagram of a thermal management system according to an embodiment of the present invention in battery cooling and passenger compartment cooling modes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection unless otherwise specifically stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 and 2, a thermal management system according to an embodiment of the present invention includes a compressor 12, a gas-liquid separator 14, a passenger compartment heat exchanger, a liquid cooling plate 16, a first heat exchanger 18, a second heat exchanger 20, and a valve assembly. The compressor 12, the first heat exchanger 18, the second heat exchanger 20 and the gas-liquid separator 14 are connected in sequence to form a refrigerant loop.

The liquid cooling plate 16 and the second heat exchanger 20 are connected to the valve assembly to form a battery heat exchange circuit. The passenger compartment heat exchanger and the first heat exchanger 18 are connected to form a passenger compartment heat exchange loop. The heat management system further comprises an air supply loop 22, one end of the air supply loop 22 is connected with the gas-liquid separator 14, and the other end of the air supply loop 22 is connected with an outlet of the compressor 12. In the low temperature heat pump mode, the refrigerant circulates in the refrigerant circuit and in the charge air circuit 22 to exchange heat with the passenger compartment heat exchanger of the passenger compartment heat exchange circuit and/or with the liquid cooling plates 16 of the battery heat exchange circuit.

In the above thermal management system, by providing the air supply loop 22, in the low-temperature heat pump mode, the air supply loop 22 can increase the flow rate of the compressor 12, so as to increase the work load of the compressor 12, without needing to rely on PTC and other elements for heating, and can also meet the heating requirements of the passenger compartment and the battery under the low-temperature working condition.

Specifically, air around the passenger compartment heat exchanger may be blown by a fan into the passenger compartment of the vehicle, and the liquid cooling panel 16 is connected to the power battery to condition (heat or cool) the power battery.

A first electronic expansion valve 24 is connected between the first heat exchanger 18 and the second heat exchanger 20, the air make-up circuit 22 includes a second electronic expansion valve 26, one end of the second electronic expansion valve 26 is connected to a first port of the gas-liquid separator 14, the other end of the second electronic expansion valve 26 is connected to an outlet (such as an exhaust port) of the compressor 12, and a second port of the gas-liquid separator 14 is connected to an air suction port of the compressor 12.

In one embodiment, first heat exchanger 18 and second heat exchanger 20 may be plate heat exchangers. It will be appreciated that in other embodiments, the first and

second heat exchangers

18, 20 may also be other types of heat exchangers, and are not limited to plate heat exchangers.

In fig. 1, the passenger compartment heat exchanger is a warm air core 28, the heat exchange mode between the first heat exchanger 18 and the warm air core 28 is an indirect heat exchange mode, the passenger compartment heat exchanger, the first heat exchanger 18 and the valve assembly are connected to form a passenger compartment heat exchange loop, cooling liquid flows in the battery heat exchange loop, and heat is transferred through the flow of the cooling liquid. Specifically, the valve assembly includes a three-way valve 30, and a first water pump 32 is also connected between the first heat exchanger 18 and the three-way valve 30 in the passenger compartment heat exchange circuit. Specifically, the first water pump 32 connects the port 2 of the three-way valve 30 and the right branch of the first heat exchanger 18, the port 1 of the three-way valve 30 is connected to one end of the warm air core 28, and the other end of the warm air core 28 is connected to the right branch of the first heat exchanger 18.

The valve assembly further comprises a four-way valve 34 and a five-way valve 36, and a second water pump 38 is also connected between the second heat exchanger 20 and the five-way valve 36 in the battery heat exchange circuit. Specifically, the second water pump 38 connects the port 4 of the five-way valve 36 and the upper branch of the second heat exchanger 20, the upper branch of the second heat exchanger 20 is connected to the port 1 of the four-way valve 34, the port 2 of the four-way valve 34 is connected to one end of the liquid cooling plate 16, and the other end of the liquid cooling plate 16 is connected to the port 3 of the five-way valve 36.

An outlet (e.g., an exhaust port) of the compressor 12 is connected to a left branch of the first heat exchanger 18, the left branch of the first heat exchanger 18 is connected to a lower branch of the second heat exchanger 20 through a first electronic expansion valve 24, and the lower branch of the second heat exchanger 20 is connected to the gas-liquid separator 14 and a second electronic expansion valve 26.

In fig. 2, the passenger compartment heat exchanger is an internal condenser 40. Referring to fig. 2, the internal condenser 40 is connected at both ends thereof to the compressor 12 and the first heat exchanger 18, respectively. That is, the internal condenser 40 is connected into the refrigerant circuit, and the passenger compartment heat exchange circuit is a part of the refrigerant circuit.

The thermal management system further comprises an evaporator 42, a first radiator 44 and a second radiator 46, wherein one end of the evaporator 42 is connected with the left branch of the first heat exchanger 18 through a third electronic expansion valve 48, and the other end of the evaporator 42 is connected with the gas-liquid separator 14 through a one-way valve 50.

In fig. 1, both ends of the first radiator 44 are connected to the port 3 of the three-way valve 30 and the right branch of the first heat exchanger 18, respectively. In fig. 2, two ends of the first radiator 44 are respectively connected to the first water pump 32 and the right branch of the first heat exchanger 18. The first water pump 32 is connected to the right branch of the first heat exchanger 18.

The two ends of the second radiator 46 are connected to the port 1 of the five-way valve 36 and the port 5 of the five-way valve 36, respectively, and one end of the second radiator 46 is also connected to the port 4 of the four-way valve 34. First radiator 44 and second radiator 46 may be offboard radiators, and first radiator 44 and second radiator 46 may be disposed side-by-side.

The thermal management system further includes a heat exchange jacket 52, and the heat exchange jacket 52 may be coupled to a motor to regulate the temperature (heating or cooling) of the motor. One end of the heat exchange jacket 52 is connected to the port 3 of the four-way valve 34, and the other end is connected to the port 2 of the five-way valve 36 via the third water pump 54.

In the low temperature heat pump mode, referring to fig. 3, during operation, after refrigerant is discharged from the outlet of the compressor 12 in the refrigerant circuit, the main circuit sequentially passes through: the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. The make-up gas passes through the second electronic expansion valve 26 of the make-up gas circuit 22 and then returns to the gas inlet branch to join with the refrigerant circuit. In this mode, the third electronic expansion valve 48 is in a closed state. Coolant loop (1) -passenger compartment heat exchange loop: the first water pump 32 works, and the cooling liquid passes through the first water pump 32, the first heat exchanger 18, the warm air core 28 and the port 1 and the port 2 (the port 1 and the port 2 are communicated) of the three-way valve 30 in sequence, so that the heating circulation of the passenger compartment is completed. Coolant loop (2) -battery heat exchange loop: the second water pump 38 operates, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, thereby completing the battery heating cycle.

In the low temperature heat pump mode, referring to fig. 2, during operation, after refrigerant is discharged from the outlet of the compressor 12 in the refrigerant circuit, the main circuit sequentially passes through: the internal condenser 40, the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. The make-up gas passes through the second electronic expansion valve 26 of the make-up gas circuit 22 and then returns to the gas inlet branch to join with the refrigerant circuit. In this mode, the third electronic expansion valve 48 is in a closed state. Coolant loop (1) -battery heat exchange loop: the second water pump 38 operates, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, thereby completing the battery heating cycle. It is to be understood that in other embodiments, the first or

second water pump

32, 38 may be activated when only the passenger compartment or the battery needs to be heated. In one example, the low temperature condition may be a normal winter condition with an ambient temperature above-10 ℃ or an extremely cold condition with an ambient temperature as low as-30 ℃.

In certain embodiments, the thermal management system further includes an evaporator 42 and a first heat sink 44. The compressor 12, the first heat exchanger 18, the evaporator 42, and the gas-liquid separator 14 are connected in sequence to form a passenger compartment refrigeration circuit. The first radiator 44 and the first heat exchanger 18 are connected to form a first off-board circulation circuit. In the passenger compartment cooling mode, the refrigerant circulates in the passenger compartment cooling circuit to exchange heat with the first radiator 44 of the first off-board circulation circuit.

In this way, cooling of the passenger compartment can be achieved.

Specifically, referring to fig. 1, the first off-board circulation circuit is further connected to a valve assembly, the valve assembly includes a three-way valve 30, and two ends of the first radiator 44 are respectively connected to the port 3 of the three-way valve 30 and the right branch of the first heat exchanger 18. The thermal management system further comprises an electronic fan 58, the electronic fan 58 being arranged beside the first heat sink 44 for dissipating heat from the first heat sink 44.

In the passenger compartment cooling mode, referring to fig. 4, the refrigerant is discharged from an outlet (e.g., a discharge port) of the compressor 12, and sequentially passes through: the first heat exchanger 18, the third electronic expansion valve 48, the evaporator 42, the check valve 50, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, thereby completing the cycle. In this mode, the first electronic expansion valve 24 and the second electronic expansion valve 26 are closed. In the first off-board circulation loop, the first water pump 32 operates, and the coolant passes through the first water pump 32, the first heat exchanger 18, the first radiator 44 in sequence, and the port 3 and the port 2 (the port 2 and the port 3 are communicated) of the three-way valve 30 to complete circulation; at the same time, the electronic fan 58 operates to dissipate heat in the first heat sink 44. In this mode, neither the second water pump 38 nor the third water pump 54 is operating.

In the passenger compartment cooling mode, referring to fig. 2, the refrigerant is discharged from an outlet (e.g., a discharge port) of the compressor 12, and sequentially passes through: the internal condenser 40, the first heat exchanger 18, the third electronic expansion valve 48, the evaporator 42, the check valve 50, and the gas-liquid separator 14, and then return to the suction port of the compressor 12, completing the cycle. In this mode, the first electronic expansion valve 24 and the second electronic expansion valve 26 are closed. In the first off-board circulation loop, the first water pump 32 works, and the cooling liquid passes through the first water pump 32, the first heat exchanger 18 and the first radiator 44 in sequence to complete circulation; at the same time, the electronic fan 58 operates to perform heat dissipation in the first heat sink 44. In this mode, neither the second water pump 38 nor the third water pump 54 is operating.

In some embodiments, the thermal management system further includes a second heat sink 46. The second radiator 46, the second heat exchanger 20, and the valve assembly are connected to form a second outside circulation circuit. In the passenger compartment conventional heat pump heating mode, the refrigerant circulates in the refrigerant circuit to exchange heat with the second radiator 46 of the second outside-vehicle circulation circuit and to exchange heat with the passenger compartment heat exchanger in the passenger compartment heat exchange circuit.

Therefore, the passenger compartment can be heated by the conventional heat pump.

Specifically, the valve assembly includes a five-way valve 36 and a four-way valve 34, both ends of the second radiator 46 are connected to port 1 of the five-way valve 36 and port 5 of the five-way valve 36, respectively, and one end of the second radiator 46 is also connected to port 4 of the four-way valve 34.

In the passenger compartment conventional heat pump heating mode, referring to fig. 5, in the refrigerant circuit, the refrigerant is discharged from the outlet of the compressor 12, and then sequentially passes through: the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, thereby completing the cycle. In this mode, the third electronic expansion valve 48 and the second electronic expansion valve 26 are closed. Coolant loop (1) -passenger compartment heat exchange loop: the first water pump 32 works, and the coolant passes through the first water pump 32, the first heat exchanger 18, the warm air core 28 and the ports 1 and 2 (the ports 1 and 2 are communicated) of the three-way valve 30 in sequence to complete circulation. Coolant circuit (2) -second outside-vehicle circulation circuit: the second water pump 38 is operated, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 4 of the four-way valve 34 (the ports 1 and 4 are communicated), the second radiator 46, and the ports 1 and 4 of the five-way valve 36 (the ports 1 and 4 are communicated) in this order; at the same time, the electronic fan 58 operates to perform heat exchange in the second heat sink 46. In this mode, the third water pump 54 is not operated.

In the passenger compartment conventional heat pump heating mode, referring to fig. 2, in the refrigerant circuit, the refrigerant is discharged from the outlet of the compressor 12, and then sequentially passes through: the internal condenser 40, the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. In this mode, the third electronic expansion valve 48 and the second electronic expansion valve 26 are closed. Coolant circuit (1) -second outside-vehicle circulation circuit: the second water pump 38 is operated, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 4 of the four-way valve 34 (the ports 1 and 4 are communicated), the second radiator 46, and the ports 1 and 4 of the five-way valve 36 (the ports 1 and 4 are communicated) in this order; at the same time, the electronic fan 58 operates to perform heat exchange in the second heat sink 46. In this mode, the third water pump 54 and the first water pump 32 are not operated.

In some embodiments, in the battery waste heat recovery heating mode, the refrigerant circulates in the refrigerant circuit to exchange heat with the passenger compartment heat exchanger of the passenger compartment heat exchange circuit and to exchange heat with the liquid cooling panels 16 of the battery heat exchange circuit.

Therefore, the heating by recovering the waste heat of the battery can be realized.

Specifically, in the waste heat battery heating mode, referring to fig. 6, in the refrigerant circuit, the refrigerant is discharged from an outlet (e.g., an exhaust port) of the compressor 12, and then sequentially passes through: the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. In this mode, the first electronic expansion valve 24 is throttled, and the third electronic expansion valve 48 and the second electronic expansion valve 26 are in a closed state. Coolant loop (1) -passenger compartment heat exchange loop: the first water pump 32 works, and the coolant sequentially passes through the first water pump 32, the first heat exchanger 18, the warm air core 28 and the port 1 and the port 2 (the port 1 is communicated with the port 2) of the three-way valve 30 to complete the heating circulation of the passenger compartment; coolant loop (2) -battery heat exchange loop: the second water pump 38 works, and the cooling liquid passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, so that the recovery cycle of the battery waste heat is completed.

In the waste heat battery heating mode, referring to fig. 2, in the refrigerant circuit, the refrigerant is discharged from an outlet (e.g., an exhaust port) of the compressor 12, and then sequentially passes through: the internal condenser 40, the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. In this mode, the first electronic expansion valve 24 is throttled, and the third electronic expansion valve 48 and the second electronic expansion valve 26 are in a closed state. Coolant loop (1) -battery heat exchange loop: the second water pump 38 works, and the cooling liquid passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, so that the recovery cycle of the battery waste heat is completed. The first and third water pumps 32 and 54 are not operated.

In certain embodiments, the thermal management system further comprises a heat exchange jacket 52, the heat exchange jacket 52 and the valve assembly being connected to form a motor heat exchange circuit. In the motor waste heat recovery heating mode, the refrigerant circularly flows in the refrigerant loop to exchange heat with the passenger compartment heat exchanger of the passenger compartment heat exchange loop and exchange heat with the liquid cooling plate 16 of the battery heat exchange loop and the heat exchange sleeve 52 of the motor heat exchange loop.

Therefore, the heating by recovering the waste heat of the motor can be realized.

Specifically, the heat exchange jacket 52 may be a heat exchange water pump, and the heat exchange jacket 52 may be connected to a motor to regulate the temperature (heating or cooling) of the motor.

The valve assembly comprises a five-way valve 36 and a four-way valve 34, one end of a heat exchange sleeve 52 is connected with the port 3 of the four-way valve 34, and the other end is connected with the port 2 of the five-way valve 36 through a third water pump 54.

In the motor waste heat recovery heating mode, referring to fig. 7, in the refrigerant circuit, the refrigerant is discharged from an outlet (e.g., an exhaust port) of the compressor 12, and then sequentially passes through: the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. In this mode, the third electronic expansion valve 48 and the second electronic expansion valve 26 are closed. Coolant loop (1) -passenger compartment heat exchange loop: the first water pump 32 works, and the coolant sequentially passes through the first water pump 32, the first heat exchanger 18, the warm air core 28 and the ports 1 and 2 (the ports 1 and 2 are communicated) of the three-way valve 30, so that the heating circulation of the passenger compartment is completed. Coolant loop (2) -battery heat exchange loop and motor heat exchange loop: the third water pump 54 and the second water pump 38 are operated, and the motor heat exchange loop is connected in series with the battery heat exchange loop. The ports 1 and 2, and 3 and 4 of the four-way valve 34 are communicated, respectively, and the ports 3 and 2, and 5 and 4 of the five-way valve 36 are communicated, respectively. Specifically, the coolant passes through the second water pump 38, the second heat exchanger 20, the port 1 of the four-way valve 34, the port 2 of the four-way valve 34, the liquid cooling plate 16, the port 3 of the five-way valve 36, the port 2 of the five-way valve 36, the third water pump 54, the heat exchange water jacket, the port 3 of the four-way valve 34, the port 4 of the four-way valve 34, the port 5 of the five-way valve 36, and the port 4 of the five-way valve 36 in this order, and returns to the second water pump 38. The electronic fan 58 is not operated.

In the motor waste heat recovery heating mode, referring to fig. 2, in the refrigerant circuit, the refrigerant is discharged from an outlet (e.g., an exhaust port) of the compressor 12, and then sequentially passes through: the internal condenser 40, the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20, and the gas-liquid separator 14 are returned to the suction port of the compressor 12, completing the cycle. In this mode, the third electronic expansion valve 48 and the second electronic expansion valve 26 are closed. Coolant loop (1) -battery heat exchange loop and motor heat exchange loop: the third water pump 54 and the second water pump 38 are operated, and the motor heat exchange loop is connected in series with the battery heat exchange loop. The ports 1 and 2, and 3 and 4 of the four-way valve 34 are communicated with each other, and the ports 3 and 2, and 5 and 4 of the five-way valve 36 are communicated with each other. Specifically, the coolant passes through the second water pump 38, the second heat exchanger 20, the port 1 of the four-way valve 34, the port 2 of the four-way valve 34, the liquid cooling plate 16, the port 3 of the five-way valve 36, the port 2 of the five-way valve 36, the third water pump 54, the heat exchange water jacket, the port 3 of the four-way valve 34, the port 4 of the four-way valve 34, the port 5 of the five-way valve 36, and the port 4 of the five-way valve 36 in this order, and returns to the second water pump 38. The electronic fan 58 is not operated and the first water pump 32 is not operated.

In some embodiments, the thermal management system includes a kettle 56, and the kettle 56 is connected to the passenger compartment heat exchange circuit, the battery heat exchange circuit, and the motor heat exchange circuit, and is configured to exhaust air and replenish fluid for the passenger compartment heat exchange circuit, the battery heat exchange circuit, and the motor heat exchange circuit.

Therefore, the water shell can be used for exhausting and replenishing the liquid for the relevant loop, and the heat exchange effect is ensured. Specifically, the kettle 56 may be an expanding water shell.

In some embodiments, the thermal management system further includes a first heat sink 44.

The first radiator 44 and the first heat exchanger 18 are connected to form a first off-board circulation circuit. In the battery cooling mode, a cooling medium circulates in the cooling medium circuit to exchange heat with the first radiator 44 of the first extra-vehicular circulation circuit and exchange heat with the liquid cooling plate 16 of the battery heat exchange circuit.

In this manner, battery cooling may be achieved.

Specifically, the first radiator 44 may be an offboard radiator.

Referring to fig. 1, the first off-board circulation circuit is further connected to a valve assembly, the valve assembly includes a three-way valve 30, and two ends of the first radiator 44 are respectively connected to the port 3 of the three-way valve 30 and the right branch of the first heat exchanger 18. The thermal management system further comprises an electronic fan 58, the electronic fan 58 being arranged beside the first heat sink 44 for dissipating heat from the first heat sink 44.

In the battery cooling mode, in fig. 8, the refrigerant in the refrigerant circuit is discharged from an outlet (e.g., an exhaust port) of the compressor 12, and passes through: the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20 and the gas-liquid separator 14 return to the suction port of the compressor 12, and the cycle is completed. In this mode, the first electronic expansion valve 24 is throttled, and the third electronic expansion valve 48 and the second electronic expansion valve 26 are in a closed state. Coolant circuit (1) -first offboard circulation circuit: the first water pump 32 works, and the cooling liquid sequentially passes through the first water pump 32, the first heat exchanger 18, the first radiator 44 and the ports 2 and 3 (the ports 2 and 3 are communicated) of the three-way valve 30 to complete the heat dissipation circulation; at the same time, the electronic fan 58 operates to dissipate heat in the first heat sink 44. Coolant loop (2) -battery heat exchange loop: the second water pump 38 operates, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, thereby completing the cooling cycle of the battery.

In the battery cooling mode, in fig. 2, the refrigerant in the refrigerant circuit is discharged from an outlet (e.g., an exhaust port) of the compressor 12, and passes through: the internal condenser 40, the first heat exchanger 18, the first electronic expansion valve 24, the second heat exchanger 20 and the gas-liquid separator 14 return to the suction port of the compressor 12, and the cycle is completed. In this mode, the first electronic expansion valve 24 is throttled, and the third electronic expansion valve 48 and the second electronic expansion valve 26 are in a closed state. Coolant circuit (1) -first offboard circulation circuit: the first water pump 32 works, and the cooling liquid passes through the first water pump 32, the first heat exchanger 18 and the first radiator 44 in sequence to complete the heat dissipation circulation; at the same time, the electronic fan 58 operates to perform heat dissipation in the first heat sink 44. Coolant loop (2) -battery heat exchange loop: the second water pump 38 operates, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, thereby completing the cooling cycle of the battery.

In some embodiments, the thermal management system further includes an evaporator 42 and a first heat sink 44. The compressor 12, the first heat exchanger 18, the evaporator 42, and the gas-liquid separator 14 are connected in sequence to form a passenger compartment refrigeration circuit.

The first radiator 44 and the first heat exchanger 18 are connected to form a first off-board circulation circuit. In the battery cooling and passenger compartment cooling modes, a refrigerant circulates in the passenger compartment cooling circuit to exchange heat with the first radiator 44 of the first extra-vehicular circulation circuit and to exchange heat with the liquid cooling panels 16 of the battery heat exchange circuit.

In this way, battery cooling and passenger compartment cooling may be achieved.

In the battery cooling and passenger compartment cooling modes, referring to fig. 9, in the passenger compartment cooling loop, the refrigerant is discharged from an outlet (e.g., an exhaust port) of the compressor 12, passes through the first heat exchanger 18 and then is divided into two paths, one path passes through the first electronic expansion valve 24 and the second heat exchanger 20, the other path passes through the third electronic expansion valve 48, the evaporator 42 and the check valve 50, the two paths are converged and then enter the gas-liquid separator 14, and return to the air suction port of the compressor 12, thereby completing the circulation. In this mode, the second electronic expansion valve 26 is closed. Coolant circuit (1) -first offboard circulation circuit: the first water pump 32 works, and the cooling liquid sequentially passes through the first water pump 32, the first heat exchanger 18, the first radiator 44 and the ports 3 and 2 (the ports 2 and 3 are communicated) of the three-way valve 30 to complete the heat dissipation circulation; at the same time, the electronic fan 58 operates to dissipate heat in the first heat sink 44. Coolant loop (2) -battery heat exchange loop: the second water pump 38 operates, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, thereby completing the cooling cycle of the battery.

In the battery cooling and passenger compartment cooling modes, referring to fig. 2, in the passenger compartment cooling circuit, the refrigerant is discharged from an outlet (e.g., an exhaust port) of the compressor 12, passes through the internal condenser 40 and the first heat exchanger 18, and then is divided into two paths, one path passes through the first electronic expansion valve 24 and the second heat exchanger 20, the other path passes through the third electronic expansion valve 48, the evaporator 42 and the check valve 50, and the two paths are merged and then enter the gas-liquid separator 14, and then return to the suction port of the compressor 12, thereby completing the cycle. In this mode, the second electronic expansion valve 26 is closed. Coolant circuit (1) -first offboard circulation circuit: the first water pump 32 works, and the cooling liquid passes through the first water pump 32, the first heat exchanger 18 and the first radiator 44 in sequence to complete the heat dissipation circulation; at the same time, the electronic fan 58 operates to dissipate heat in the first heat sink 44. Coolant loop (2) -battery heat exchange loop: the second water pump 38 operates, and the coolant passes through the second water pump 38, the second heat exchanger 20, the ports 1 and 2 (the ports 1 and 2 are communicated) of the four-way valve 34, the liquid cooling plate 16, and the ports 3 and 4 (the ports 3 and 4 are communicated) of the five-way valve 36 in sequence, thereby completing the cooling cycle of the battery.

In some embodiments, the thermal management system further includes an electronic fan 58, the electronic fan 58 being configured to dissipate heat from the heat sink. Therefore, the heat dissipation efficiency of the radiator can be improved.

Specifically, in one embodiment, the thermal management system includes a first heat sink 44 and a second heat sink 46, the first heat sink 44 and the second heat sink 46 being arranged side-by-side, and an electronic fan 58 being arranged beside the first heat sink 44. When the electronic fan 58 is operated, air can be blown to the first heat sink 44 and the second heat sink 46, so as to improve the heat dissipation efficiency of the first heat sink 44 and the second heat sink 46.

In the vehicle, the heat management system is provided with the air supply loop 22, in the low-temperature heat pump mode, the air supply loop 22 can increase the flow rate of the compressor 12, so that the work load of the compressor 12 is increased, the heating by using elements such as PTC is not required, and the heating requirements of a passenger compartment and a battery can be met under the low-temperature working condition.

Specifically, the vehicle may include, but is not limited to, a full electric vehicle, a hybrid, an extended range electric vehicle.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A thermal management system is characterized by comprising a compressor, a gas-liquid separator, a passenger compartment heat exchanger, a liquid cooling plate, a first heat exchanger, a second heat exchanger and a valve assembly;

the heat management system also comprises an air supply loop, wherein one end of the air supply loop is connected with the gas-liquid separator, and the other end of the air supply loop is connected with the outlet of the compressor;

2. The thermal management system of claim 1, further comprising an evaporator and a first heat sink;

the compressor, the first heat exchanger, the evaporator and the gas-liquid separator are sequentially connected to form a passenger compartment refrigerating loop;

3. The thermal management system of claim 1, further comprising a second heat sink;

the second radiator, the second heat exchanger and the valve assembly are connected to form a second outside-vehicle circulation loop;

in a passenger compartment conventional heat pump heating mode, refrigerant circularly flows in the refrigerant loop to exchange heat with the second radiator of the second outside-vehicle circulation loop and exchange heat with a passenger compartment heat exchanger of the passenger compartment heat exchange loop.

4. The thermal management system of claim 1, wherein in a battery waste heat recovery heating mode, a coolant circulates in the coolant loop to exchange heat with a passenger compartment heat exchanger of the passenger compartment heat exchange loop and to exchange heat with a liquid cooled panel of the battery heat exchange loop.

5. The thermal management system of claim 1, further comprising a heat exchange jacket, wherein the heat exchange jacket and the valve assembly are connected to form an electric machine heat exchange circuit;

in the motor waste heat recovery heating mode, a refrigerant circularly flows in the refrigerant loop to exchange heat with a passenger cabin heat exchanger of the passenger cabin heat exchange loop, and exchange heat with a liquid cooling plate of the battery heat exchange loop and a heat exchange sleeve of the motor heat exchange loop.

6. The thermal management system of claim 5, comprising a water kettle connecting the passenger compartment heat exchange circuit, the battery heat exchange circuit, and the motor heat exchange circuit and configured to vent and replenish the passenger compartment heat exchange circuit, the battery heat exchange circuit, and the motor heat exchange circuit.

7. The thermal management system of claim 1, further comprising a first heat sink;

in the battery cooling mode, refrigerant circularly flows in the refrigerant loop to exchange heat with the first radiator of the first vehicle-outside circulating loop and exchange heat with the liquid cooling plate of the battery heat exchange loop.

8. The thermal management system of claim 1, further comprising an evaporator and a first heat sink;

9. The thermal management system of claim 2, 3, 7 or 8, further comprising an electronic fan for dissipating heat from the heat sink.

10. A vehicle comprising a thermal management system according to any of claims 1-9.