Thermal management system and new energy vehicles

Abstract

The present invention relates to the technical field of new energy vehicles, and in particular to a thermal management system and a new energy vehicle. The thermal management system includes a refrigerant circulation subsystem and a secondary circulation subsystem, wherein the refrigerant circulation subsystem includes a compressor, a condenser, an expansion valve, an evaporator and a gas-liquid separator, wherein the compressor, the condenser, the expansion valve, the evaporator and the gas-liquid separator are sequentially connected through a refrigerant pipeline to form a closed loop; the secondary circulation subsystem includes an air-conditioning heater, an air-conditioning cooler, a battery cooler, a motor electronically controlled radiator and an off-vehicle heat exchanger. The thermal management system provided by the present invention effectively solves the problem of thermal management requirements between multiple thermal management objects such as vehicle interior air conditioning, battery cooling, and temperature control of the motor electronic control system under different climatic conditions, has a simple operation process, high reliability, and improves the overall energy efficiency of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a thermal management system and a new energy vehicle. Background Art

[0002] At present, thermal management technology is one of the core key technologies for the development of new energy vehicles, especially electric vehicles. It includes functions such as vehicle interior thermal and humidity environment regulation, battery, motor and other power system temperature control, and window glass anti-fogging and defogger. It is an important guarantee for vehicle driving safety and comfort.

[0003] As an indispensable guarantee system for safe and comfortable driving of vehicles, the existing thermal management system has gradually become more restrictive to the development of new energy vehicles. The climate environment has a prominent impact on the thermal management system. Under extreme climate conditions such as severe cold, heat, and high humidity, the thermal management system has high energy consumption, which greatly restricts the vehicle's mileage. In addition, due to the great differences in energy requirements and temperature tastes of different thermal management objects such as cabin air conditioning, battery heat dissipation, motor electronic control system power system temperature control, the existing thermal management system has complex operation procedures and low overall system energy efficiency. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, the present invention proposes a thermal management system that can solve the problems of complex operating procedures and high energy consumption caused by energy and taste differences between multiple thermal management objects in the thermal management system of new energy vehicles under different climatic conditions.

[0006] The invention also provides a new energy vehicle.

[0007] A thermal management system according to an embodiment of the first aspect of the present invention includes:

[0008] A refrigerant circulation subsystem, the refrigerant circulation subsystem comprising a compressor, a condenser, an expansion valve, an evaporator and a gas-liquid separator, the compressor, the condenser, the expansion valve, the evaporator and the gas-liquid separator being connected in sequence through a refrigerant pipeline to form a closed loop;

[0009] A secondary circulation subsystem, the secondary circulation subsystem includes an air-conditioning heater, an air-conditioning cooler, a battery cooler, an electric motor electronically controlled radiator and an off-vehicle heat exchanger, wherein the secondary medium outlet of the condenser is respectively connected to the air-conditioning heater and the electric motor electronically controlled radiator, the secondary medium inlet of the condenser is respectively connected to the air-conditioning heater and the off-vehicle heat exchanger, and the electric motor electronically controlled radiator is connected to the off-vehicle heat exchanger; the secondary medium outlet of the evaporator is respectively connected to the off-vehicle heat exchanger and the air-conditioning cooler, the secondary medium inlet of the evaporator is respectively connected to the battery cooler and the electric motor electronically controlled radiator, and the air-conditioning cooler is connected to the battery cooler.

[0010] According to one embodiment of the present invention, the secondary medium outlet of the condenser is connected to the first main pipeline of the condenser, the first main pipeline of the condenser is connected to the air-conditioning heater through a first branch pipeline, and the first main pipeline of the condenser is connected to the motor electronically controlled radiator through a second branch pipeline; the first main pipeline of the condenser, the first branch pipeline and the second branch pipeline are connected through a first electric three-way valve.

[0011] According to one embodiment of the present invention, the secondary medium inlet of the condenser is connected to the second main pipe of the condenser, the second main pipe of the condenser is connected to the air-conditioning heater through a third branch pipe, and the second main pipe of the condenser is connected to the external heat exchanger through a fourth branch pipe.

[0012] According to one embodiment of the present invention, the secondary medium outlet of the evaporator is connected to the first main pipeline of the evaporator, the first main pipeline of the evaporator is connected to the external heat exchanger through the fifth branch pipeline, and the first main pipeline of the evaporator is connected to the air-conditioning cooler through the sixth branch pipeline; the first main pipeline of the evaporator, the fifth branch pipeline and the sixth branch pipeline are connected through a second electric three-way valve.

[0013] According to one embodiment of the present invention, the secondary medium inlet of the evaporator is connected to the second main pipe of the evaporator, the second main pipe of the evaporator is connected to the battery cooler through the seventh branch pipe, and the second main pipe of the evaporator is connected to the motor electronic control radiator through the eighth branch pipe.

[0014] According to one embodiment of the present invention, the fourth branch pipeline includes two interconnected fourth branch sub-pipelines, and the fifth branch pipeline is connected to the two fourth branch sub-pipelines via a third electric three-way valve.

[0015] According to one embodiment of the present invention, the second branch pipeline includes two second branch sub-pipelines connected to each other, and the eighth branch pipeline is connected to the two second branch sub-pipelines via a fourth electric three-way valve.

[0016] According to one embodiment of the present invention, a high-temperature circulating water pump and a first constant-pressure expansion tank are respectively provided on the second main pipeline of the condenser.

[0017] According to one embodiment of the present invention, a low-temperature circulating water pump and a second constant-pressure expansion tank are respectively provided on the second main pipeline of the evaporator.

[0018] A new energy vehicle according to an embodiment of the second aspect of the present invention comprises a thermal management system according to the embodiment of the first aspect.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0020] The thermal management system of the embodiment of the present invention includes a refrigerant circulation subsystem and a secondary circulation subsystem, wherein the refrigerant circulation subsystem includes a compressor, a condenser, an expansion valve, an evaporator and a gas-liquid separator, and the compressor, the condenser, the expansion valve, the evaporator and the gas-liquid separator are sequentially connected through a refrigerant pipeline to form a closed loop, and the secondary circulation subsystem includes an air-conditioning heater, an air-conditioning cooler, a battery cooler, a motor electronically controlled radiator and an off-vehicle heat exchanger, wherein the condenser and the air-conditioning heater are connected to form a closed loop, and the evaporator, the off-vehicle heat exchanger and the motor electronically controlled radiator are sequentially connected to form a closed loop, and the condenser , the motor electronic control radiator and the vehicle external heat exchanger are connected in sequence to form a closed loop, and the evaporator, the air conditioning cooler and the battery cooler are connected in sequence to form a closed loop, so that when the thermal management system is in operation, a refrigerant cycle is formed through the closed loop between the compressor, the condenser, the expansion valve, the evaporator and the gas-liquid separator, so that the evaporator is used to provide cooling capacity for the secondary circulation subsystem, and the condenser is used to provide heating capacity for the secondary circulation subsystem. Through the switching movement between the closed loops formed by the secondary circulation subsystem, multiple thermal management requirements such as vehicle interior air conditioning, battery cooling, and temperature control of the motor electronic control system can be met. Therefore, the thermal management system of the embodiment of the present invention uses the process switching of the refrigerant circulation subsystem to cooperate with the secondary circulation subsystem, which effectively solves the thermal management requirements of multiple thermal management objects such as vehicle interior air conditioning, battery cooling, and temperature control of the motor electronic control system under different climatic conditions. Not only is the operation process simple and reliable, but it also effectively reduces the amount of refrigerant charged in the system, which is beneficial to reducing the environmental problems caused by the use of refrigerants. At the same time, the heat dissipation of the motor electronic control system can be reused, thereby improving the overall energy efficiency of the system.

[0021] The new energy vehicle of the embodiment of the present invention comprises the thermal management system of the above embodiment. Since the new energy vehicle is provided with the thermal management system of the above embodiment, the new energy vehicle has all the advantages of the above thermal management system, thereby improving the performance of the new energy vehicle.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the structure of a thermal management system provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of vehicle interior cooling of a thermal management system provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of vehicle interior heating of a thermal management system provided by an embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of vehicle interior dehumidification of a thermal management system provided in an embodiment of the present invention.

[0027] Reference numerals:

[0028] 1: compressor; 2: condenser; 3: expansion valve; 4: evaporator; 5: gas-liquid separator; 6: high-temperature circulating water pump; 7: low-temperature circulating water pump; 8: air-conditioning heater; 9: air-conditioning cooler; 10: battery cooler; 11: motor electronically controlled radiator; 12: outdoor heat exchanger; 13: first electric three-way valve; 14: second electric three-way valve; 15: third electric three-way valve; 16: fourth electric three-way valve; 17: first constant-pressure expansion tank; 18: second constant-pressure expansion tank. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] like Figure 1 As shown, an embodiment of the present invention provides a thermal management system, including a refrigerant circulation subsystem and a secondary circulation subsystem.

[0035] The refrigerant circulation subsystem includes a compressor 1, a condenser 2, an expansion valve 3, an evaporator 4 and a gas-liquid separator 5, and the compressor 1, the condenser 2, the expansion valve 3, the evaporator 4 and the gas-liquid separator 5 are sequentially connected through a refrigerant pipeline to form a closed loop. The refrigerant flows in one direction in the refrigerant pipeline, that is, the refrigerant circulation subsystem adopts a one-way refrigerant circulation. In the refrigerant circulation subsystem, the evaporator 4 provides cooling capacity, and the condenser 2 provides heating capacity, thereby eliminating the electric valve for switching between cooling and heating conditions, making the process of the refrigerant circulation subsystem simpler and more reliable, and effectively reducing the amount of refrigerant charged in the refrigerant circulation subsystem.

[0036] The secondary circulation subsystem includes an air conditioning heater 8, an air conditioning cooler 9, a battery cooler 10, an electric motor electronically controlled radiator 11, and an external heat exchanger 12, wherein the secondary medium outlet of the condenser 2 is respectively connected to the air conditioning heater 8 and the electric motor electronically controlled radiator 11, the secondary medium inlet of the condenser 2 is respectively connected to the air conditioning heater 8 and the external heat exchanger 12, and the electric motor electronically controlled radiator 11 is connected to the external heat exchanger 12. The secondary medium outlet of the evaporator 4 is respectively connected to the external heat exchanger 12 and the air conditioning cooler 9, the secondary medium inlet of the evaporator 4 is respectively connected to the battery cooler 10 and the electric motor electronically controlled radiator 11, and the air conditioning cooler 9 is connected to the battery cooler 10. That is, a high-temperature secondary circulation subsystem can be formed between the condenser 2, the air conditioning heater 8, the electric motor electronically controlled radiator 11, and the external heat exchanger 12, and a low-temperature secondary circulation subsystem can be formed between the evaporator 4, the external heat exchanger 12, the electric motor electronically controlled radiator 11, the battery cooler 10, and the air conditioning cooler 9. Among them, secondary medium circulates in the high-temperature secondary circulation subsystem and the low-temperature secondary circulation subsystem. The secondary medium can be water, antifreeze or coolant. The condenser 2 and the evaporator 4 are heat exchange devices for heat exchange between the refrigerant and the secondary medium. The heat can be supplied to the vehicle interior through the air-conditioning heater 8 through the high-temperature secondary circulation subsystem, or dissipated outside the vehicle through the external heat exchanger 12. The heat can be absorbed from the air-conditioning cooler 9, the battery cooler 10 or the motor electronic control radiator 11 through the low-temperature secondary circulation subsystem.

[0037] Among them, in the high-temperature secondary circulation subsystem, the connection between the condenser 2 and the air-conditioning heater 8 can form a closed loop, and the connection between the condenser 2, the motor electronically controlled radiator 11 and the external heat exchanger 12 can form another closed loop. In the low-temperature secondary circulation subsystem, the connection between the evaporator 4, the external heat exchanger 12 and the motor electronically controlled radiator 11 can form a closed loop, and the connection between the evaporator 4, the air-conditioning cooler 9 and the battery cooler 10 can form another closed loop. That is, through the switching movement between the closed loops formed by the secondary circulation subsystem, multiple thermal management requirements such as vehicle interior air conditioning, battery cooling, and temperature control of the motor electronic control system can be met.

[0038] Therefore, the thermal management system of the embodiment of the present invention adopts the process switching of the refrigerant circulation subsystem in coordination with the secondary circulation subsystem, which effectively solves the thermal management demand problem among multiple thermal management objects such as vehicle interior air conditioning, battery cooling, and temperature control of the motor and electronic control system under different climatic conditions. It not only has a simple operation process and high reliability, but also effectively reduces the amount of refrigerant charged in the system, which is beneficial to reducing the environmental problems caused by the use of refrigerant. At the same time, it can reuse the heat dissipation of the motor and electronic control system, thereby improving the overall energy efficiency of the system.

[0039] In a specific embodiment of the present invention, the secondary medium outlet of the condenser 2 is connected to the first main pipeline of the condenser, the first main pipeline of the condenser is connected to the air-conditioning heater 8 through the first branch pipeline, and the first main pipeline of the condenser is connected to the motor electronically controlled radiator 11 through the second branch pipeline. Among them, the first main pipeline of the condenser, the first branch pipeline and the second branch pipeline are connected through the first electric three-way valve 13. That is, through the switching operation of the first electric three-way valve 13, the switching operation between the two closed loops in the high-temperature secondary circulation subsystem can be performed.

[0040] In a specific embodiment of the present invention, the secondary medium inlet of the condenser 2 is connected to the second main pipeline of the condenser, the second main pipeline of the condenser is connected to the air-conditioning heater 8 through the third branch pipeline, and the second main pipeline of the condenser is connected to the external heat exchanger 12 through the fourth branch pipeline, thereby facilitating the switching operation between the two closed loops in the high-temperature secondary circulation subsystem.

[0041] In a specific embodiment of the present invention, the secondary medium outlet of the evaporator 4 is connected to the first main pipeline of the evaporator, the first main pipeline of the evaporator is connected to the outside heat exchanger 12 through the fifth branch pipeline, and the first main pipeline of the evaporator is connected to the air conditioner cooler 9 through the sixth branch pipeline. Among them, the first main pipeline of the evaporator, the fifth branch pipeline and the sixth branch pipeline are connected through the second electric three-way valve 14. That is, through the switching operation of the second electric three-way valve 14, the switching operation between the two closed loops in the low-temperature secondary circulation subsystem can be performed.

[0042] In a specific embodiment of the present invention, the secondary medium inlet of the evaporator 4 is connected to the second main pipeline of the evaporator, the second main pipeline of the evaporator is connected to the battery cooler 10 through the seventh branch pipeline, and the second main pipeline of the evaporator is connected to the motor electronic control radiator 11 through the eighth branch pipeline, thereby facilitating the switching operation between the two closed loops in the low-temperature secondary circulation subsystem.

[0043] In a specific embodiment of the present invention, the fourth branch pipeline includes two interconnected fourth branch sub-pipelines, and the fifth branch pipeline is connected to the two fourth branch sub-pipelines through the third electric three-way valve 15. The second branch pipeline includes two interconnected second branch sub-pipelines, and the eighth branch pipeline is connected to the two second branch sub-pipelines through the fourth electric three-way valve 16. Since there is a common branch between the high-temperature secondary circulation subsystem and the low-temperature secondary circulation subsystem, the common branch is the motor electronically controlled radiator 11, the off-vehicle heat exchanger 12, and the connecting pipeline between the two. That is, through the switching operation of the third electric three-way valve 15 and the fourth electric three-way valve 16, it is possible to choose to connect the common branch to the high-temperature secondary circulation subsystem or the low-temperature secondary circulation subsystem.

[0044] In a further embodiment of the present invention, a high-temperature circulating water pump 6 and a first constant-pressure expansion tank 17 are respectively provided on the second main pipeline of the condenser. The high-temperature circulating water pump 6 is used to provide circulating power of the secondary medium for the high-temperature secondary circulation subsystem, and the first constant-pressure expansion tank 17 is used to supplement the secondary medium to the high-temperature secondary circulation subsystem.

[0045] In a further embodiment of the present invention, a low-temperature circulating water pump 7 and a second constant-pressure expansion tank 18 are respectively provided on the second main pipeline of the evaporator. The low-temperature circulating water pump 7 is used to provide circulating power of the secondary medium for the low-temperature secondary circulation subsystem, and the second constant-pressure expansion tank 18 is used to supplement the secondary medium to the low-temperature secondary circulation subsystem.

[0046] The working principle of the thermal management system of the embodiment of the present invention is as follows:

[0047] When the thermal management system is in operation, the compressor 1 is started to start the refrigerant circulation. The refrigerant is compressed into high-temperature, high-pressure gas by the compressor 1, then flows into the condenser 2 to cool and release heat, and then enters the evaporator 4 to evaporate and absorb heat after being throttled by the expansion valve 3, and then returns to the compressor 1 through the gas-liquid separator 5, thus forming a refrigerant cycle, using the evaporator 4 to provide cooling capacity and the condenser 2 to provide heating capacity. In this process, the process switching of the secondary circulation subsystem is used to meet multiple thermal management requirements such as vehicle interior air conditioning, battery cooling, and temperature control of motors or electronic control systems.

[0048] When the ambient temperature outside the vehicle is high, the main requirements of the thermal management system are vehicle interior cooling, battery cooling, and motor electronic control heat dissipation, such as Figure 2 As shown, Figure 2 The middle dotted line represents the refrigerant circulation subsystem, and the black line represents the secondary circulation subsystem in operation. At this time, in the high-temperature secondary circulation subsystem, the secondary medium outlet of the condenser 2 is connected to the second branch pipe through the first main pipe of the condenser, and the secondary medium inlet of the condenser 2 is connected to the fourth branch pipe through the second main pipe of the condenser, so that the condenser 2, the motor electronically controlled radiator 11, the off-vehicle heat exchanger 12, the first constant pressure expansion tank 17 and the high-temperature circulating water pump 6 are connected in sequence to form a closed loop, so that the off-vehicle heat exchanger 12 can dissipate the heat of the condenser 2 and the heat of the motor electronically controlled radiator 11 to the outside environment of the vehicle. At the same time, in the low-temperature secondary circulation subsystem, the secondary medium outlet of the evaporator 4 is connected to the sixth branch pipe through the first main pipe of the evaporator, and the secondary medium inlet of the evaporator 4 is connected to the seventh branch pipe through the second main pipe of the evaporator, so that the evaporator 4, the air-conditioning cooler 9, the battery cooler 10, the second constant pressure expansion tank 18 and the low-temperature circulating water pump 7 are connected in sequence to form a closed loop, so that the cold energy of the evaporator 4 is transferred to the air-conditioning cooler 9 and the battery cooler 10 through the circulation of the secondary medium, thereby realizing vehicle cabin cooling and battery cooling.

[0049] When the ambient temperature outside the vehicle is low, the main requirements of the thermal management system are heating the vehicle interior and cooling the motor and electronic control system. Figure 3 As shown, Figure 3 The middle dotted line represents the refrigerant circulation subsystem, and the black line represents the secondary circulation subsystem in operation. At this time, in the high-temperature secondary circulation subsystem, the secondary medium outlet of the condenser 2 is connected to the first branch pipe through the first main pipe of the condenser, and the secondary medium inlet of the condenser 2 is connected to the third branch pipe through the second main pipe of the condenser, so that the condenser 2, the air-conditioning heater 8, the first constant pressure expansion tank 17 and the high-temperature circulating water pump 6 are connected in sequence to form a closed loop, so that the heat of the condenser 2 is transferred to the air-conditioning heater 8 through the circulation of the secondary medium, thereby realizing the heating of the vehicle cabin. At the same time, in the low-temperature secondary circulation subsystem, the secondary medium outlet of the evaporator 4 is connected to the fifth branch pipe through the first main pipe of the evaporator, and the secondary medium inlet of the evaporator 4 is connected to the eighth branch pipe through the second main pipe of the evaporator, so that the evaporator 4, the external heat exchanger 12, the motor electronically controlled radiator 11, the second constant pressure expansion tank 18 and the low-temperature circulating water pump 7 are connected in sequence to form a closed loop, so that the evaporator 4 can absorb heat from the motor electronically controlled radiator 11 or the external heat exchanger 12 to achieve temperature control of the motor electronic control system, and at the same time, the waste heat of the motor electronic control system can be reused, and the waste heat of the motor electronic control system can be used as a heat source for the refrigerant circulation subsystem to achieve low-energy heating of the vehicle cabin.

[0050] When the humidity in the car is high, the main requirement of the thermal management system is to dehumidify the car, such as Figure 4 As shown, Figure 4 The middle dotted line represents the refrigerant circulation subsystem, and the black line represents the secondary circulation subsystem in operation. At this time, in the low-temperature secondary circulation subsystem, the secondary medium outlet of the evaporator 4 is connected to the sixth branch pipe through the first main pipe of the evaporator, and the secondary medium inlet of the evaporator 4 is connected to the seventh branch pipe through the second main pipe of the evaporator, so that the evaporator 4, the air conditioning cooler 9, the battery cooler 10, the second constant pressure expansion tank 18 and the low-temperature circulation water pump 7 are connected in sequence to form a closed loop, and the coldness of the evaporator 4 is transported to the air conditioning cooler 9 through the circulation of the secondary medium, so that the cabin air is cooled and condensed, and the temperature and humidity are reduced. At the same time, in the high-temperature secondary circulation subsystem, the secondary medium outlet of the condenser 2 is connected to the first branch pipe through the first main pipe of the condenser, and the secondary medium inlet of the condenser 2 is connected to the third branch pipe through the second main pipe of the condenser, so that the condenser 2, the air-conditioning heater 8, the first constant pressure expansion tank 17 and the high-temperature circulating water pump 6 are connected in sequence to form a closed loop, so that the heat of the condenser 2 is transferred to the air-conditioning heater 8 through the circulation of the secondary medium, thereby reheating the vehicle cabin air and achieving the purpose of dehumidifying the vehicle cabin.

[0051] The embodiment of the present invention also provides a new energy vehicle, comprising the thermal management system of the above embodiment. Since the new energy vehicle is provided with the thermal management system of the above embodiment, the new energy vehicle has all the advantages of the above thermal management system, thereby improving the performance of the new energy vehicle.

[0052] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A thermal management system, characterized in that: include: A refrigerant circulation subsystem, the refrigerant circulation subsystem comprising a compressor (1), a condenser (2), an expansion valve (3), an evaporator (4) and a gas-liquid separator (5), the compressor (1), the condenser (2), the expansion valve (3), the evaporator (4) and the gas-liquid separator (5) being connected in sequence through a refrigerant pipeline to form a closed loop; A secondary circulation subsystem, the secondary circulation subsystem comprising an air conditioning heater (8), an air conditioning cooler (9), a battery cooler (10), an electric motor electronically controlled radiator (11) and an off-vehicle heat exchanger (12), wherein the secondary medium outlet of the condenser (2) is respectively connected to the air conditioning heater (8) and the electric motor electronically controlled radiator (11), the secondary medium inlet of the condenser (2) is respectively connected to the air conditioning heater (8) and the off-vehicle heat exchanger (12), and the electric motor electronically controlled radiator (11) is connected to the off-vehicle heat exchanger (12); the secondary medium outlet of the evaporator (4) is respectively connected to the off-vehicle heat exchanger (12) and the air conditioning cooler (9), the secondary medium inlet of the evaporator (4) is respectively connected to the battery cooler (10) and the electric motor electronically controlled radiator (11), and the air conditioning cooler (9) is connected to the battery cooler (10).

2. The thermal management system according to claim 1, characterized in that: The secondary medium outlet of the condenser (2) is connected to the first main pipeline of the condenser, the first main pipeline of the condenser is connected to the air-conditioning heater (8) via a first branch pipeline, and the first main pipeline of the condenser is connected to the motor electronically controlled radiator (11) via a second branch pipeline; the first main pipeline of the condenser, the first branch pipeline and the second branch pipeline are connected via a first electric three-way valve (13).

3. The thermal management system according to claim 1, characterized in that: The secondary medium inlet of the condenser (2) is connected to the second main pipeline of the condenser, the second main pipeline of the condenser is connected to the air-conditioning heater (8) through a third branch pipeline, and the second main pipeline of the condenser is connected to the external heat exchanger (12) through a fourth branch pipeline.

4. The thermal management system according to claim 3, characterized in that: The secondary medium outlet of the evaporator (4) is connected to the first main pipeline of the evaporator, the first main pipeline of the evaporator is connected to the external heat exchanger (12) via a fifth branch pipeline, and the first main pipeline of the evaporator is connected to the air-conditioning cooler (9) via a sixth branch pipeline; the first main pipeline of the evaporator, the fifth branch pipeline and the sixth branch pipeline are connected via a second electric three-way valve (14).

5. The thermal management system according to claim 2, characterized in that: The secondary medium inlet of the evaporator (4) is connected to the second main pipeline of the evaporator, the second main pipeline of the evaporator is connected to the battery cooler (10) through a seventh branch pipeline, and the second main pipeline of the evaporator is connected to the motor electronic control radiator (11) through an eighth branch pipeline.

6. The thermal management system according to claim 4, characterized in that: The fourth branch pipeline comprises two interconnected fourth branch sub-pipelines, and the fifth branch pipeline is connected to the two fourth branch sub-pipelines via a third electric three-way valve (15).

7. The thermal management system according to claim 5, characterized in that: The second branch pipeline comprises two second branch sub-pipelines connected to each other, and the eighth branch pipeline is connected to the two second branch sub-pipelines via a fourth electric three-way valve (16).

8. The thermal management system according to claim 3, characterized in that: A high-temperature circulating water pump (6) and a first constant-pressure expansion tank (17) are respectively provided on the second main pipeline of the condenser.

9. The thermal management system according to claim 5, characterized in that: A low-temperature circulating water pump (7) and a second constant-pressure expansion tank (18) are respectively provided on the second main pipeline of the evaporator.

10. A new energy vehicle, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 9.

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