Vehicle thermal management system and vehicle

Abstract

The invention provides a vehicle thermal management system and a vehicle. The vehicle thermal management system comprises a cooling liquid loop and a refrigerant loop. The cooling liquid loop comprises an electric drive heat exchange loop provided with an electric drive device and a heat exchange device in series. The refrigerant loop comprises a refrigerant driving circulation loop, a first heat exchange loop outside the cockpit, an air conditioner heat exchange loop in the cockpit and a flow path switching assembly. The refrigerant driving circulation loop comprises a compressor and a heat exchange device which are arranged in series. The first heat exchange loop outside the cockpit comprises a condenser outside the cockpit and a first expansion valve which are arranged in series. The air conditioner heat exchange loop in the cockpit comprises a battery pack and a cockpit air conditioner box which are arranged in parallel. And the battery pack and the cockpit air conditioning box are respectively communicated with the first expansion valve. The first heat exchange pipeline outside the cockpit and the air conditioner heat exchange loop inside the cockpit communicate with the refrigerant driving loop through the flow path switching assembly. Parts such as a battery cooling water pipe and a battery water pump are omitted, waste heat of the electric driving device is used for synchronously heating the battery pack and the cockpit, and energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular, to a vehicle thermal management system and a vehicle. Background Art

[0002] The thermal management system of existing new energy vehicles usually includes a motor heat exchange circuit, a battery circulation circuit, an air conditioning heat exchange circuit in the cockpit, and a heat exchange circuit outside the cockpit. Since each circuit system is independent of each other, the pipeline layout is complicated, and the battery heat exchange circuit usually has a large number of cooling water pipes and water pumps and other devices, which also occupy a large space and increase energy consumption.

[0003] Therefore, how to develop a thermal management system that is compact and energy-saving is of great significance to the development of new energy vehicles. Summary of the invention

[0004] The present application provides a vehicle thermal management system and a vehicle, which have a compact structure and can save energy.

[0005] Specifically, the present application is implemented through the following technical solutions:

[0006] On one hand, the present application provides a vehicle thermal management system, comprising:

[0007] Coolant circuit and refrigerant circuit;

[0008] The coolant circuit includes an electric drive heat exchange circuit in which an electric drive device and a heat exchange device are arranged in series;

[0009] The refrigerant circuit includes a refrigerant drive circulation circuit, a first heat exchange circuit outside the cockpit, an air conditioning heat exchange circuit inside the cockpit, and a flow path switching component;

[0010] The refrigerant driven circulation loop includes a compressor and the heat exchange device arranged in series; the first heat exchange loop outside the cockpit includes an outside cockpit condenser and a first expansion valve arranged in series; the air-conditioning heat exchange loop inside the cockpit includes a battery pack and a cockpit air-conditioning box arranged in parallel, and the battery pack and the cockpit air-conditioning box are respectively connected to the first expansion valve; the first heat exchange pipeline outside the cockpit and the air-conditioning heat exchange loop inside the cockpit are both connected to the refrigerant driven loop through the flow path switching component.

[0011] Optionally, the flow path switching component includes a first port and a second port;

[0012] The air conditioning heat exchange circuit in the cockpit includes an air conditioning refrigerant inlet branch connecting the battery pack and the first port, and an air conditioning refrigerant outlet branch connecting the battery pack and the second port; the air conditioning refrigerant inlet branch and the air conditioning refrigerant outlet branch are located on the same side of the battery pack, and are both connected to the cockpit air conditioning box.

[0013] Optionally, the cockpit air conditioning heat exchange circuit further includes a first refrigerant flow branch connecting the battery pack and the first expansion valve, and a second refrigerant flow branch connecting the cockpit air conditioning box and the first expansion valve;

[0014] The first refrigerant circulation branch and the second refrigerant circulation branch are both provided with a second expansion valve;

[0015] The valve port diameter of the second expansion valve is not less than one third of the pipeline diameter, and the valve port opening of the second expansion valve is adjustable.

[0016] Optionally, the cockpit air conditioning box includes an evaporator and a built-in condenser arranged in parallel; the evaporator is located on a side of the cockpit air conditioning box close to the battery pack;

[0017] And / or, the cockpit air conditioning box is arranged adjacent to the battery pack, and the cockpit air conditioning box also includes a PTC heater.

[0018] Optionally, the flow path switching component further includes a third port and a fourth port;

[0019] The first heat exchange circuit outside the cockpit includes an inlet refrigerant heat exchange branch connecting the condenser outside the cockpit and the third port, and an outlet refrigerant heat exchange branch connecting the condenser outside the cockpit and the fourth port;

[0020] The inlet refrigerant heat exchange branch and the outlet refrigerant heat exchange branch are located on the same side of the condenser outside the cockpit, and the outlet refrigerant heat exchange branch is provided with a one-way stop valve.

[0021] Optionally, the valve port diameter of the first expansion valve is not less than one-third of the pipeline diameter, and the valve port opening of the first expansion valve is adjustable.

[0022] Optionally, the flow path switching component further includes a fifth port and a sixth port;

[0023] The refrigerant driven circulation loop comprises an inlet refrigerant circulation branch connecting the fifth port and the heat exchange device, and an outlet refrigerant circulation branch connecting the heat exchange device and the sixth port; the outlet refrigerant circulation branch is provided with the compressor;

[0024] The fifth port is selectively communicable with the second port and the fourth port; the sixth port is selectively communicable with the first port and the third port.

[0025] Optionally, the refrigerant driven circulation loop further includes a temperature and pressure sensor disposed on the refrigerant outlet circulation branch and connected in series with the compressor; the vehicle thermal management system further includes a controller;

[0026] The temperature and pressure sensor, the first expansion valve, and the second expansion valve are all connected to the controller.

[0027] Optionally, the coolant circuit further comprises a second heat exchange circuit outside the cockpit provided with a radiator outside the cockpit; the second heat exchange circuit outside the cockpit is connected to the electric drive heat exchange circuit via a four-way valve;

[0028] The four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port;

[0029] The inlet of the radiator outside the cockpit is communicated with the first valve port; the outlet of the radiator outside the cockpit is communicated with the third valve port; the coolant outlet of the electric drive device is communicated with the second valve port; and the heat exchange device is communicated with the fourth valve port;

[0030] The second valve port can selectively communicate with the first valve port and the fourth valve port.

[0031] On the other hand, the present application provides a vehicle, comprising: a vehicle thermal management system as described in any one of the above.

[0032] The technical solution provided by this application can achieve the following beneficial effects:

[0033] The present application provides a vehicle thermal management system and a vehicle. The vehicle thermal management system connects the battery pack and the cockpit air conditioning box in parallel in the air conditioning heat exchange circuit in the cockpit, and then the refrigerant drive circulation circuit exchanges heat with the electric drive heat exchange circuit through the heat exchange device, and then flows into the air conditioning heat exchange circuit in the cockpit through the flow path switching component, so that the battery pack and the cockpit can be heated synchronously by using the waste heat of the electric drive device, which not only eliminates components such as battery cooling water pipes and battery water pumps, but also makes the circuit system structure more compact and saves energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic structural diagram of a vehicle thermal management system shown in an exemplary embodiment of the present application.

[0035] Figure numerals: 10, electric drive device; 11, heat exchange device; 12, flow path switching assembly; a, first port; b, second port; c, third port; d, fourth port; e, fifth port; f, sixth port; 13, compressor; 14, condenser outside the cockpit; 15, first expansion valve; 16, battery pack; 17, cockpit air conditioning box; 171, evaporator; 172, built-in condenser; 173, PTC heater; 18, second expansion valve; 19, one-way stop valve; 20, temperature and pressure sensor; 21, radiator outside the cockpit; 22, four-way valve; g, first valve port; h, second valve port; i, third valve port; j, fourth valve port; 23, low-pressure fan; 24, pressure sensor; 25, gas-liquid separator; 26, water delivery pump; 100, vehicle thermal management system;

[0036] L1, electric drive heat exchange circuit; L1-1, coolant inlet heat exchange pipeline; L1-2, coolant outlet heat exchange pipeline; L2, refrigerant drive circulation circuit; L2-1, refrigerant inlet circulation branch; L2-2, refrigerant outlet circulation branch; L3, first heat exchange pipeline outside the cockpit; L3-1, refrigerant inlet heat exchange branch; L3-2, refrigerant outlet heat exchange branch; L4, air conditioning heat exchange circuit in the cockpit; L4-1, air conditioning refrigerant inlet branch; L4-2, air conditioning refrigerant outlet branch; L4-3, first refrigerant circulation branch; L4-4, second refrigerant circulation branch; L5, second heat exchange pipeline outside the cockpit. DETAILED DESCRIPTION

[0037] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings.

[0038] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0039] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0040] See also Figure 1The present application provides a vehicle thermal management system 100, including a coolant circuit and a refrigerant circuit. The coolant circuit includes an electric drive heat exchange circuit L1 in which an electric drive device 10 and a heat exchange device 11 are arranged in series. The refrigerant circuit includes a refrigerant drive circulation circuit L2, a first heat exchange circuit L3 outside the cockpit, an air conditioning heat exchange circuit L4 inside the cockpit, and a flow path switching component 12. The refrigerant drive circulation circuit L2 includes a compressor 13 and the heat exchange device 11 arranged in series. The first heat exchange circuit L3 outside the cockpit includes a condenser 14 outside the cockpit and a first expansion valve 15 arranged in series. The air conditioning heat exchange circuit L4 inside the cockpit includes a battery pack 16 and a cockpit air conditioning box 17 arranged in parallel. The battery pack 16 and the cockpit air conditioning box 17 are respectively connected to the first expansion valve 15. The first heat exchange pipeline L3 outside the cockpit and the air conditioning heat exchange circuit L4 inside the cockpit are both connected to the refrigerant drive circuit L2 through the flow path switching component 12.

[0041] Exemplarily, the heat exchange device 11 generally has a refrigerant heat exchange side and a coolant heat exchange side, the electric drive heat exchange loop L1 is connected to the coolant heat exchange side, and the coolant drive circulation loop L2 is connected to the coolant heat exchange side. When the electric drive device 10 generates waste heat during operation, the coolant in the electric drive heat exchange loop L1 can carry the heat of the waste heat and flow through the coolant heat exchange side of the heat exchange device 11, and achieve heat exchange with the refrigerant flowing through the refrigerant heat exchange side of the refrigerant drive circulation loop L2.

[0042] The vehicle thermal management system 100 provided by the present application eliminates multiple battery cooling water pipes and battery water pumps and other components in the traditional battery circulation loop. By setting the battery pack 16 in the air conditioning heat exchange loop L4 in the cockpit and connecting it in parallel with the cockpit air conditioning box 17, it can achieve the effect of compact structure and weight reduction. Then, after the refrigerant drive circulation loop L2 exchanges heat with the electric drive heat exchange loop L1, it flows into the air conditioning heat exchange loop L4 in the cockpit through the flow path switching component 12, and uses the waste heat of the electric drive device 10 to heat the battery pack 16 and the cockpit synchronously, saving energy consumption.

[0043] It should be noted that the refrigerant may be Freon or propylene glycol, but is not limited thereto. The cooling liquid includes but is not limited to a mixture of water and ethylene glycol.

[0044] In one embodiment, the electric drive heat exchange loop L1 further includes a water delivery pump 26 and / or a temperature and pressure sensor 20 disposed between the electric drive device 10 and the heat exchange device 11 to facilitate delivery of coolant and / or detection of the temperature and pressure of the coolant.

[0045] Please continue reading Figure 1In one embodiment, the flow switching assembly 12 includes a first port a and a second port b. The air conditioning heat exchange circuit L4 in the cockpit includes an air conditioning inlet refrigerant branch L4-1 connecting the battery pack 16 and the first port a, and an air conditioning outlet refrigerant branch L4-2 connecting the battery pack 16 and the second port b. The air conditioning inlet refrigerant branch L4-1 and the air conditioning outlet refrigerant branch L4-2 are located on the same side of the battery pack 16, and are both connected to the cockpit air conditioning box 17. In this way, the pipeline arrangement of the battery pack and the cockpit air conditioning box can be simplified, making the layout more compact. Exemplarily, one end of the air conditioning inlet refrigerant branch L4-1 is connected to the first port a of the flow switching assembly 12, and after the air conditioning outlet refrigerant branch L4-2 is connected to the second port b of the flow switching assembly 12, the air conditioning inlet refrigerant branch L4-1 and the air conditioning outlet refrigerant branch L4-2 can be merged into a main line to connect to the battery pack. In addition, the cockpit air-conditioning box 17 is also connected to the main line, that is, the battery pack 16 and the cockpit air-conditioning box 17 are connected to the air-conditioning refrigerant inlet branch L4-1 or the air-conditioning refrigerant outlet branch L4-2 through the main line to achieve the purpose of synchronous cooling and synchronous heating.

[0046] In one embodiment, the cockpit air conditioning heat exchange circuit L4 further includes a first refrigerant flow branch L4-3 connecting the battery pack 16 and the first expansion valve 15, and a second refrigerant flow branch L4-4 connecting the cockpit air conditioning box 17 and the first expansion valve 15. The first refrigerant flow branch L4-3 and the second refrigerant flow branch L4-4 are both provided with a second expansion valve 18. The valve port diameter of the second expansion valve 18 is not less than one-third of the pipeline diameter, and the valve port opening of the second expansion valve 18 is adjustable.

[0047] By providing the second expansion valve 18 with adjustable opening in both the first refrigerant circulation branch L4-3 and the second refrigerant circulation branch L4-4, in a winter environment, the vehicle thermal management system 100 starts the first working mode for heating the battery pack 16 and the cockpit together. After the refrigerant in the refrigerant drive circulation loop L2 exchanges heat with the coolant in the electric drive heat exchange loop L1, it is compressed into a high-temperature and high-pressure refrigerant through the compressor 13, and then flows into the air-conditioning heat exchange loop L4 in the cockpit through the first port a of the flow path switching component 12, and then changes into a medium-temperature and medium-pressure refrigerant after heat exchange with the battery pack 16 and the cockpit air-conditioning box 17. At this time, the valve port opening of the second expansion valve 18 can be adjusted to a larger degree to serve as a pipeline. After the medium-temperature and medium-pressure refrigerant is transmitted to the first expansion valve 15 for throttling, it is evaporated at low temperature in the condenser 14 outside the cockpit to become a low-temperature and low-pressure refrigerant, and then flows back to the compressor through the flow path switching component 12, and further exchanges heat with the coolant in the electric drive heat exchange loop L1 through the heat exchange device 11. In the summer environment, when the vehicle thermal management system 100 starts the second working mode for cooling the battery pack 16 and the cockpit together, the refrigerant in the refrigerant driven circulation loop L2 exchanges heat with the coolant in the electric drive heat exchange loop L1, is compressed into a high-temperature and high-pressure refrigerant by the compressor 13, and then flows into the cockpit condenser 14 in the first heat exchange loop L3 outside the cockpit through the flow switching component 12 to dissipate heat. At this time, the valve opening of the second expansion valve 18 can be adjusted to a smaller value to play a throttling role to reduce the pressure, and then evaporates through the battery pack 16 and the cockpit air-conditioning box 17 to achieve cooling, and then flows back to the refrigerant driven circulation loop L2 through the second port b of the flow switching component 12.

[0048] It should be noted that the second expansion valve 18 is usually a large-caliber electronic expansion valve, which is larger than the diameter of an ordinary electronic expansion valve, so as to meet the refrigerant reversing requirements of the air-conditioning heat exchange circuit L4 in the cockpit.

[0049] In one embodiment, the cockpit air conditioning box 17 includes an evaporator 171 and a built-in condenser 172 arranged in parallel. The evaporator 171 is located on the side of the cockpit air conditioning box 17 close to the battery pack 16. The cockpit air conditioning box 17 is mainly responsible for adjusting the temperature in the cockpit to meet the comfort needs of the passengers. When the vehicle thermal management system 100 starts the second working mode for cooling the battery pack 16 and the cockpit together, the evaporator 171 in the cockpit air conditioning box 17 can absorb a large amount of heat in the environment when evaporating the refrigerant to cool the cockpit, and can also further remove heat from the battery pack 16 to achieve the purpose of cooling.

[0050] In one embodiment, the cockpit air conditioning box 17 is disposed adjacent to the battery pack 16, and the cockpit air conditioning box 17 further includes a PTC heater 173. Thus, when the residual heat generated by the electric drive device 10 is insufficient during operation, auxiliary heating can be further performed by PTC to heat the battery pack 16 and the cockpit synchronously.

[0051] In one embodiment, the flow path switching assembly 12 further includes a third port c and a fourth port d. The first heat exchange circuit L3 outside the cockpit includes an inlet refrigerant heat exchange branch L3-1 connecting the condenser 14 outside the cockpit and the third port c, and an outlet refrigerant heat exchange branch L3-2 connecting the condenser 14 outside the cockpit and the fourth port d. The inlet refrigerant heat exchange branch L3-1 and the outlet refrigerant heat exchange branch L3-2 are located on the same side of the condenser 14 outside the cockpit, and the outlet refrigerant heat exchange branch L3-2 is provided with a one-way stop valve 19. Thus, in a winter environment, the vehicle thermal management system 100 starts the first working mode for heating the battery pack 16 and the cockpit together, and the one-way stop valve 19 can be opened to allow the refrigerant to flow back into the heat exchange device 11 through the outlet refrigerant heat exchange branch L3-2 and the fourth port d to control the flow direction of the refrigerant.

[0052] In one embodiment, a low-pressure fan 23 is also provided near the cockpit external condenser 14. After the low-pressure fan 23 is started, the air flow can be accelerated to help the cockpit external condenser 14 work more effectively. In one embodiment, the refrigerant inlet heat exchange branch L3-1 is also provided with a pressure sensor 24, and the working intensity of the low-pressure fan 23 can be controlled by the pressure signal in the refrigerant inlet heat exchange branch L3-1 detected by the pressure sensor 24.

[0053] In one embodiment, the valve port diameter of the first expansion valve 15 is not less than one-third of the pipeline diameter, and the valve port opening of the first expansion valve 15 is adjustable. In winter, when the vehicle thermal management system 100 is started in the first working mode of heating the battery pack 16 and the cockpit together, the opening of the first expansion valve 15 can be adjusted to be smaller to achieve a throttling effect. In summer, when the vehicle thermal management system 100 is started in the second working mode of cooling the battery pack 16 and the cockpit together, the opening of the first expansion valve 15 can be adjusted to be larger to act as a pipeline to transmit refrigerant.

[0054] It should be noted that the first expansion valve 15 is usually a large-caliber electronic expansion valve, which is larger than the diameter of an ordinary electronic expansion valve, so as to meet the refrigerant reversing requirement of the first heat exchange circuit L3 outside the cockpit.

[0055] In one embodiment, the flow path switching assembly 12 further includes a fifth port e and a sixth port f. The refrigerant driven circulation loop L2 includes an inlet refrigerant circulation branch L2-1 connecting the fifth port e and the heat exchange device 11, and an outlet refrigerant circulation branch L2-2 connecting the heat exchange device 11 and the sixth port f; the outlet refrigerant circulation branch L2-2 is provided with the compressor 13. The fifth port e can be selectively connected to the second port b and the fourth port d; the sixth port f can be selectively connected to the first port a and the third port c. Therefore, in a winter environment, when the vehicle thermal management system 100 starts the first working mode for heating the battery pack 16 and the cockpit together, the sixth port f can be controlled to be connected to the first port a, and the fifth port e can be controlled to be connected to the fourth port d. The high-temperature and high-pressure refrigerant compressed by the compressor 13 heats the battery pack 16 and the cockpit through the sixth port f and the first port a in turn, and then flows back to the heat exchange device 11 through the fourth port d and the fifth port e in turn for heat exchange. In a summer environment, when the vehicle thermal management system 100 starts the second working mode for cooling the battery pack 16 and the cockpit together, the sixth port f can be controlled to be connected to the third port c, and the fifth port e can be controlled to be connected to the second port b, so that the high-temperature and high-pressure refrigerant compressed by the compressor 13 flows into the cockpit condenser 14 in the first heat exchange circuit L3 outside the cockpit through the sixth port f and the third port c in turn to dissipate heat, and then cool the battery pack 16 and the cockpit, and then flow back to the heat exchange device 11 through the second port b and the fifth port e in turn for heat exchange.

[0056] It should be noted that the flow path switching component 12 may adopt a six-way valve, or a valve island formed by the cooperation of multiple circuits and multiple valves.

[0057] In one embodiment, the refrigerant drive circulation loop L2 also includes a temperature and pressure sensor 20 arranged in the refrigerant outlet circulation branch L2-2 and connected in series with the compressor 13; the vehicle thermal management system 100 also includes a controller (not shown in the figure). The temperature and pressure sensor 20, the first expansion valve 15 and the second expansion valve 18 are all connected to the controller. For example, after the controller obtains that the vehicle thermal management system 100 needs to execute the first working mode for heating the battery pack 16 and the cockpit together, the superheat data of the refrigerant can be calculated in real time according to the temperature data and pressure data of the refrigerant in the pipeline detected by the temperature and pressure sensor 20, and the opening of the first expansion valve 15 is controlled to become smaller according to the superheat data to play a throttling role, and the opening of the second expansion valve 18 is controlled to become larger to play a role of pipeline transportation, so that the vehicle thermal management system 100 can smoothly execute the first working mode.

[0058] In one embodiment, a temperature and pressure sensor 20 is further connected in series between the first expansion valve 15 and the second expansion valve 18 to more accurately control the opening of the first expansion valve 15 and the second expansion valve 18 .

[0059] In one embodiment, the refrigerant driven circulation loop L2 also includes a gas-liquid separator 25 arranged on the refrigerant outlet circulation branch L2-2 and connected in series with the compressor 13. The gas-liquid separator 25 is arranged on the inlet side of the compressor 13 to separate the liquid in the refrigerant to prevent liquid hammer from occurring and affecting the operation of the compressor 13.

[0060] In one embodiment, the coolant circuit also includes a second heat exchange circuit L5 outside the cockpit provided with a radiator 21 outside the cockpit; the second heat exchange circuit L5 outside the cockpit is connected to the electric drive heat exchange circuit L1 through a four-way valve 22. The four-way valve 22 includes a first valve port g, a second valve port h, a third valve port i and a fourth valve port j. The inlet of the radiator 21 outside the cockpit is connected to the first valve port g; the outlet of the radiator 21 outside the cockpit is connected to the third valve port i; the coolant outlet of the electric drive device 10 is connected to the second valve port h; and the heat exchange device 11 is connected to the fourth valve port j. The second valve port h can be selectively connected to the first valve port i and the fourth valve port j. Therefore, when the battery pack 16 and the cockpit need to use the residual heat of the electric drive device 10 for heating, the second valve port h and the fourth valve port j are controlled to be connected, so that the coolant carrying the residual heat flows to the heat exchange device 11 through the second valve port h and the fourth valve port j in sequence for heat exchange. When the battery pack 16 and the cockpit do not need to use the waste heat of the electric drive device 10 for heating, the second valve port h and the first valve port g are controlled to be connected. At this time, the coolant carrying the waste heat flows through the second valve port h and the first valve port g in turn to the radiator 21 outside the cockpit to dissipate heat and exchange the heat to the external environment.

[0061] Another aspect of the present application provides a vehicle, comprising the vehicle thermal management system 100 described in any one of the above items.

[0062] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A vehicle thermal management system, characterized in that: include: Coolant circuit and refrigerant circuit; The coolant circuit includes an electric drive heat exchange circuit in which an electric drive device and a heat exchange device are arranged in series; The refrigerant circuit includes a refrigerant drive circulation circuit, a first heat exchange circuit outside the cockpit, an air conditioning heat exchange circuit inside the cockpit, and a flow path switching component; The refrigerant driven circulation loop includes a compressor and the heat exchange device arranged in series; the first heat exchange loop outside the cockpit includes an outside cockpit condenser and a first expansion valve arranged in series; the air-conditioning heat exchange loop inside the cockpit includes a battery pack and a cockpit air-conditioning box arranged in parallel, and the battery pack and the cockpit air-conditioning box are respectively connected to the first expansion valve; the first heat exchange pipeline outside the cockpit and the air-conditioning heat exchange loop inside the cockpit are both connected to the refrigerant driven loop through the flow path switching component.

2. The vehicle thermal management system according to claim 1, characterized in that: The flow path switching assembly includes a first port and a second port; The air conditioning heat exchange circuit in the cockpit includes an air conditioning refrigerant inlet branch connecting the battery pack and the first port, and an air conditioning refrigerant outlet branch connecting the battery pack and the second port; the air conditioning refrigerant inlet branch and the air conditioning refrigerant outlet branch are located on the same side of the battery pack, and are both connected to the cockpit air conditioning box.

3. The vehicle thermal management system according to claim 2, characterized in that: The cockpit air conditioning heat exchange circuit also includes a first refrigerant flow branch connecting the battery pack and the first expansion valve, and a second refrigerant flow branch connecting the cockpit air conditioning box and the first expansion valve; The first refrigerant circulation branch and the second refrigerant circulation branch are both provided with a second expansion valve; The valve port diameter of the second expansion valve is not less than one third of the pipeline diameter, and the valve port opening of the second expansion valve is adjustable.

4. The vehicle thermal management system according to claim 3, characterized in that: The cockpit air conditioning box is arranged adjacent to the battery pack; the cockpit air conditioning box comprises an evaporator and a built-in condenser arranged in parallel; the evaporator is located on a side of the cockpit air conditioning box close to the battery pack; And / or, the cockpit air-conditioning box is arranged adjacent to the battery pack; the cockpit air-conditioning box also includes a PTC heater.

5. The vehicle thermal management system according to claim 3, characterized in that: The flow path switching component also includes a third port and a fourth port; The first heat exchange circuit outside the cockpit includes an inlet refrigerant heat exchange branch connecting the condenser outside the cockpit and the third port, and an outlet refrigerant heat exchange branch connecting the condenser outside the cockpit and the fourth port; The inlet refrigerant heat exchange branch and the outlet refrigerant heat exchange branch are located on the same side of the condenser outside the cockpit, and the outlet refrigerant heat exchange branch is provided with a one-way stop valve.

6. The vehicle thermal management system according to claim 5, characterized in that: The valve port diameter of the first expansion valve is not less than one third of the pipeline diameter, and the valve port opening of the first expansion valve is adjustable.

7. The vehicle thermal management system according to claim 6, characterized in that: The flow path switching assembly further includes a fifth port and a sixth port; The refrigerant driven circulation loop comprises an inlet refrigerant circulation branch connecting the fifth port and the heat exchange device, and an outlet refrigerant circulation branch connecting the heat exchange device and the sixth port; the outlet refrigerant circulation branch is provided with the compressor; The fifth port is selectively communicable with the second port and the fourth port; the sixth port is selectively communicable with the first port and the third port.

8. The vehicle thermal management system according to claim 7, characterized in that: The refrigerant driven circulation loop further includes a temperature and pressure sensor disposed on the refrigerant outlet circulation branch and connected in series with the compressor; the vehicle thermal management system further includes a controller; The temperature and pressure sensor, the first expansion valve, and the second expansion valve are all connected to the controller.

9. The vehicle thermal management system according to any one of claims 1 to 8, characterized in that: The coolant circuit also includes a second heat exchange circuit outside the cockpit provided with an external radiator of the cockpit; the second heat exchange circuit outside the cockpit is connected to the electric drive heat exchange circuit through a four-way valve; The four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port; The inlet of the radiator outside the cockpit is communicated with the first valve port; the outlet of the radiator outside the cockpit is communicated with the third valve port; the coolant outlet of the electric drive device is communicated with the second valve port; and the heat exchange device is communicated with the fourth valve port; The second valve port can selectively communicate with the first valve port and the fourth valve port.

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

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