A thermal management system and vehicle

Abstract

The application discloses a thermal management system and a vehicle. The thermal management system comprises an electric drive loop, and the electric drive loop comprises: an electric drive main loop, the electric drive main loop comprising a first electric drive assembly and a low-temperature radiator which are connected in series; a first electric drive branch, the first electric drive branch comprising a second electric drive assembly, the second electric drive assembly being connected in parallel with the first electric drive assembly; and a second electric drive branch, the second electric drive branch comprising a generator assembly, the generator assembly being connected in parallel with the first electric drive assembly and the second electric drive assembly. The technical scheme of the application can reduce the probability that the power of the power system of the vehicle is limited.

Description

Technical Field

[0001] This application relates to the field of vehicle thermal management technology, specifically to a thermal management system and a vehicle. Background Technology

[0002] In range-extending mode of four-wheel drive vehicles, the generator, generator controller, and drive motor in the electric drive circuit generate a significant amount of heat. This can easily lead to overheating of the drive motor, generator, or generator controller, exceeding their limits and ultimately limiting the power output of the vehicle's powertrain. Utility Model Content

[0003] In view of the above problems, this application provides a thermal management system and a vehicle that can reduce the probability of power limitation in the vehicle's power system.

[0004] According to one aspect of the embodiments of this application, a thermal management system is provided, the thermal management system including an electric drive circuit, the electric drive circuit including: an electric drive main circuit including a first electric drive assembly and a low temperature heat sink connected in series; a first electric drive branch including a second electric drive assembly connected in parallel with the first electric drive assembly; and a second electric drive branch including a generator assembly connected in parallel with the first electric drive assembly and the second electric drive assembly.

[0005] In one optional exemplary embodiment, the thermal management system further includes a battery circuit, an air conditioning circuit, and an engine circuit. The battery circuit is connected to the air conditioning circuit and can exchange heat with the air conditioning circuit. The battery circuit is connected to the engine circuit and can exchange heat with the engine circuit. The engine circuit is connected to the air conditioning circuit and can provide heat to the air conditioning circuit.

[0006] In one optional exemplary embodiment, the thermal management system further includes a multi-way valve that connects the electric drive circuit and the battery circuit to enable the electric drive circuit to exchange heat with the battery circuit.

[0007] In one optional exemplary embodiment, the multi-way valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port, two of which are connected to the battery circuit, and the other two are connected to the electric drive circuit.

[0008] In an optional exemplary embodiment, the thermal management system further includes a third electric drive branch, and the multi-way valve includes a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port. One end of the third electric drive branch is connected to the first valve port, and the other end of the third electric drive branch is connected to the outlet of the low-temperature radiator. Two of the second valve port, the third valve port, the fourth valve port, and the fifth valve port are connected to the battery circuit, and the other two are connected to the electric drive circuit.

[0009] In an optional exemplary embodiment, the thermal management system further includes a first bypass branch, and the multi-way valve further includes a sixth valve port and a seventh valve port. The two ends of the first bypass branch are connected to the sixth valve port and the seventh valve port respectively, and the air conditioning circuit is connected to the first bypass branch.

[0010] In one optional exemplary embodiment, the air conditioning circuit includes: a first air conditioning refrigeration circuit and a first air conditioning branch, wherein the first air conditioning refrigeration circuit includes an evaporator, a compressor, and a non-subcooled condenser connected in series; the first air conditioning branch includes a compressor, a refrigerant side of a water-cooled condenser, and a refrigerant side of a battery cooler connected in series; and the water side of the battery cooler is connected to the battery circuit.

[0011] In an optional exemplary embodiment, the air conditioning circuit further includes a first air conditioning heating circuit, which includes a heater and a warm air core, wherein the heater and the warm air core are connected in series with the water side of the water-cooled condenser.

[0012] In an optional exemplary embodiment, both the first air conditioning heating circuit and the battery circuit are connected to the engine circuit.

[0013] According to another aspect of the embodiments of this application, a vehicle is provided, including a frame and the above-described thermal management system, the thermal management system being connected to the frame.

[0014] In this application, the first electric drive assembly, the second electric drive assembly, and the generator assembly are connected in parallel. Therefore, after the coolant exits from the low-temperature radiator, it is divided into flow paths, entering the first electric drive assembly, the second electric drive assembly, and the generator assembly respectively, before returning to the low-temperature radiator. This effectively avoids the coolant exiting the low-temperature radiator entering one of the three components for heating before entering the other components. Ultimately, this ensures that the inlet water temperature of the first electric drive assembly, the second electric drive assembly, and the generator assembly is consistent, and effectively reduces the flow resistance of the electric drive circuit.

[0015] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0016] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the structure of the thermal management system provided in Embodiment 1 of this application is shown.

[0017] Figure 2 Another structural schematic diagram of the thermal management system provided in Embodiment 1 of this application is shown.

[0018] Figure 3 A schematic diagram of the thermal management system provided in Embodiment 2 of this application is shown.

[0019] Figure label: 11. First electric drive assembly; 12. First water pump; 13. Low-temperature radiator; 14. Second electric drive assembly; 15. Generator assembly; 16. Third electric drive branch; 21. Evaporator; L1. First coaxial tube; 22. Compressor; 23. Non-subcooled condenser; L2. Second coaxial tube; 24. Third water pump; 25. Heater; 26. Heater core; 27. Receiver tank; 31. Engine water jacket; 32. Fourth water... 33. Pump; 34. High-temperature radiator; 35. Thermostat; 36. Exhaust gas recirculation cooler; 47. Oil cooler; 48. Battery pack assembly; 49. Second water pump; 50. First bypass branch; 51. Battery cooler; 52. Plate heat exchanger; 53. Water-cooled condenser; 54. Three-way valve; 55. Multi-way valve; 56. First solenoid valve; 57. Second solenoid valve; 58. Third solenoid valve; 59. Fourth solenoid valve. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0021] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and processor devices and microcontroller devices.

[0022] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0023] In this application, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Example 1 Embodiment 1 of this application provides a thermal management system and a vehicle. The vehicle includes a frame and a thermal management system, and the thermal management system is connected to the frame.

[0025] Combination Figure 1 As shown, the thermal management system includes an electric drive circuit. The electric drive circuit includes a main electric drive circuit, which includes a first electric drive assembly 11, a first water pump 12, and a low-temperature radiator 13 connected in series. The first water pump 12 is located between the outlet of the low-temperature radiator 13 and the inlet of the first electric drive assembly 11 to provide power for the flow of coolant in the electric drive circuit.

[0026] Optionally, the first electric drive assembly 11 is the front electric drive assembly of a four-wheel drive vehicle.

[0027] Furthermore, the electric drive circuit also includes a first electric drive branch, which includes a second electric drive assembly 14, and the second electric drive assembly 14 and the first electric drive assembly 11 are connected in parallel.

[0028] Optionally, the second electric drive assembly 14 is the rear electric drive assembly of a four-wheel drive vehicle.

[0029] Furthermore, the electric drive circuit also includes a second electric drive branch, which includes a generator assembly 15. The generator assembly 15 is connected in parallel with the first electric drive assembly 11 and the second electric drive assembly 14. The generator assembly 15 includes a generator and a generator controller.

[0030] It should be understood that after the generator assembly 15 is connected in parallel with the first electric drive assembly 11 and the second electric drive assembly 14, the coolant flowing out through the first water pump 12 can simultaneously enter the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15, and the coolant passing through the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15 can simultaneously flow back to the inlet of the low-temperature radiator 13.

[0031] In this invention, the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 are connected in parallel. Therefore, after the coolant exits from the low-temperature radiator 13, it is divided into three flow paths, entering the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 respectively, before returning to the low-temperature radiator 13. This effectively prevents the coolant from exiting the low-temperature radiator 13 from first entering one of the three components for heating before entering the others. Ultimately, this ensures that the inlet water temperature of the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 is consistent, and effectively reduces the flow resistance of the electric drive circuit.

[0032] Furthermore, the thermal management system also includes an air conditioning circuit and a battery circuit. The battery circuit is connected to the air conditioning circuit and can exchange heat with the air conditioning circuit.

[0033] In this embodiment, the air conditioning circuit includes a first air conditioning refrigeration circuit for cooling the passenger compartment. The first air conditioning refrigeration circuit includes an evaporator 21, a first coaxial tube L1, a compressor 22, a non-subcooled condenser 23, and a second coaxial tube L2 connected in series.

[0034] Furthermore, the air conditioning circuit also includes a second air conditioning refrigeration circuit, which includes the refrigerant side of a battery cooler 51 connected in series, a first coaxial tube L1, a compressor 22, a non-subcooled condenser 23, and a second coaxial tube L2. The battery cooler 51 is connected in parallel with the evaporator 21. The inlet of the refrigerant side of the battery cooler 51 is also equipped with a first solenoid valve 56 to throttle the refrigerant into low-temperature, low-pressure wet vapor. The battery circuit includes a battery pack assembly 41, a second water pump 42, and the water side of the battery cooler 51 connected in series.

[0035] It should be understood that the refrigerant passing through the evaporator 21, the first coaxial tube L1, and the compressor 22 enters the second coaxial tube L2. The refrigerant flowing out of the second coaxial tube L2 enters the refrigerant side of the battery cooler 51, and the coolant in the battery circuit flows to the water side of the battery cooler 51, thereby achieving heat exchange between the second air conditioning refrigeration circuit and the battery circuit, and thus achieving the purpose of cooling the battery pack assembly 41.

[0036] In this embodiment, the air conditioning circuit also includes a first air conditioning heating circuit for heating the passenger compartment. The first air conditioning heating circuit includes a third water pump 24, a heater 25 and a warm air core 26 connected in series.

[0037] Furthermore, the air conditioning circuit also includes a second air conditioning heating circuit, which includes a third water pump 24, a heater 25, and the hot side of a plate heat exchanger 52 connected in series. The battery circuit includes a battery pack assembly 41, a second water pump 42, the water side of a battery cooler 51, the cold side of a plate heat exchanger 52, and the second water pump 42 connected in series.

[0038] It should be understood that the high-temperature refrigerant flowing out of the heater 25 enters the hot side of the plate heat exchanger 52, and the coolant of the battery circuit flows to the cold side of the plate heat exchanger 52, thereby realizing the heat exchange between the second air conditioning heating circuit and the battery circuit, thereby achieving the purpose of heating the battery pack assembly 41.

[0039] Furthermore, the hot side of the plate heat exchanger 52 and the heating core 26 are connected in parallel via a three-way valve 54, so that the high-temperature coolant flowing out of the heater 25 can flow into the hot side of the plate heat exchanger 52 and the heating core 26 at the same time, thereby simultaneously achieving heating of the occupant cabin and heating of the battery pack assembly 41.

[0040] like Figure 1 As shown, the thermal management system also includes an engine circuit, which includes a main engine cooling circuit for cooling the engine. The main engine cooling circuit includes an engine water jacket 31, a fourth water pump 32, a high-temperature radiator 33, and a thermostat 34 connected in series.

[0041] Furthermore, the engine circuit also includes an exhaust gas recirculation circuit for reusing exhaust gases, which includes an engine water jacket 31, a thermostat 34, an exhaust gas recirculation cooler 35, an oil cooler 36, and a fourth water pump 32 connected in series.

[0042] Furthermore, the engine circuit also includes a first hot gas bypass circuit, which includes an engine water jacket 31, a third water pump 24, a heater 25, the hot side of a plate heat exchanger 52, an oil cooler 36, and a fourth water pump 32 connected in series.

[0043] It should be understood that the battery circuit and the engine circuit are interconnected through the plate heat exchanger 52 and can exchange heat with the engine circuit. Specifically, the high-temperature coolant (e.g., engine oil) of the engine circuit can flow to the hot side of the plate heat exchanger 52 through the engine water jacket 31 and heater 25 in the first hot gas bypass circuit, and after the coolant of the battery circuit flows to the cold side of the plate heat exchanger 52, heat exchange can be achieved between the two, thereby achieving the purpose of heating the battery pack assembly 41. Finally, under the action of the fourth water pump 32, it flows back to the engine water jacket 31 through the oil cooler 36.

[0044] In this embodiment, both the first air conditioning heating circuit and the battery circuit are connected to the engine circuit. Furthermore, the air conditioning circuit is connected to the engine circuit so that the air conditioner can be heated by the heat from the engine circuit. The engine circuit also includes a second hot gas bypass circuit, which includes an engine water jacket 31, a third water pump 24, a heater 25, a heater core 26, an oil cooler 36, and a fourth water pump 32 connected in series.

[0045] It should be understood that the high-temperature coolant in the engine circuit can flow to the heater core 26 via the second hot gas bypass circuit to heat the air conditioner.

[0046] Furthermore, the engine water jacket 31 and the heater 25 are connected in parallel via a three-way valve 54, so that the high-temperature coolant in the engine circuit can continue to circulate in the first hot gas bypass circuit and the second hot gas bypass circuit after being heated by the heater 25 while flowing back to the engine water jacket 31.

[0047] Combination Figure 2 As shown, the thermal management system also includes a multi-way valve 55, which connects the electric drive circuit and the battery circuit to enable the electric drive circuit to exchange heat with the battery circuit.

[0048] In an exemplary embodiment of this application, the multi-way valve 55 may be a four-way valve. The four-way valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port. Two of the first valve port, the second valve port, the third valve port, and the fourth valve port are connected to the battery circuit, and the other two of the first valve port, the second valve port, the third valve port, and the fourth valve port are connected to the electric drive circuit.

[0049] For example, the first and second valve ports are connected to the electric drive circuit. The third and fourth valve ports are connected to the battery circuit.

[0050] It should be understood that by switching the connection status of each valve port, multiple modes of the thermal management system can be achieved.

[0051] For example, when the first valve port is connected to the second valve port, the first water pump 12, the first electric drive assembly 11, the first valve port, the second valve port, and the low-temperature radiator 13 can be connected in series to form a circulation loop, thereby achieving individual cooling of the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly. When the third valve port is connected to the fourth valve port, the battery pack assembly 41, the second water pump 42, the water side of the battery cooler 51, the cold side of the plate heat exchanger 52, the third valve port, the fourth valve port, and the second water pump 42 can be connected in series to form a circulation loop, thereby achieving heat exchange between the battery pack assembly 41 and the air conditioning circuit or the engine circuit.

[0052] For example, when the first valve port is connected to the fourth valve port and the second valve port is connected to the third valve port, the high-temperature coolant in the electric drive circuit can be used to heat the battery pack assembly 41. Specifically, the high-temperature coolant in the electric drive circuit enters the battery circuit through the first and fourth valve ports to heat the battery pack assembly 41, and then flows through the third and second valve ports into the low-temperature radiator 13 for cooling before returning to the first water pump 12.

[0053] In summary, this embodiment can ensure that the inlet water temperature of the three circuits—the main electric drive circuit, the first electric drive branch circuit, and the second electric drive branch circuit—is consistent. It can not only use the high-temperature coolant in the engine circuit to heat the battery pack assembly 41 and / or heat the passenger compartment, but also heat the battery pack assembly 41 through the second air conditioning heating circuit and cool it through the second air conditioning cooling circuit. Furthermore, it can utilize the heat from the electric drive circuit to heat the battery pack assembly 41.

[0054] Example 2 Combination Figure 3 As shown, the thermal management system in this embodiment 2 is largely the same as the thermal management system in embodiment 1, except that the number of valve ports of the multi-way valve is different and the connection methods of the electric drive circuit, battery circuit, air conditioning circuit and engine circuit are different.

[0055] In this embodiment, as Figure 3 As shown, the thermal management system also includes a third electric drive branch 16. The multi-way valve 55 includes a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port. One end of the third electric drive branch 16 is connected to the first valve port, and the other end of the third electric drive branch 16 is connected between the liquid outlet of the low-temperature radiator 13 and the liquid inlet of the first water pump 12.

[0056] Furthermore, two of the second, third, fourth, and fifth valve ports are connected to the battery circuit, and the other two of the second, third, fourth, and fifth valve ports are connected to the electric drive circuit.

[0057] For example, the second valve port is connected to the liquid outlet on the cold side of the plate heat exchanger 52, the third valve port is connected to the liquid inlet of the low-temperature radiator 33, the fourth valve port is connected to the liquid inlet of the second water pump 42, and the fifth valve port is connected to the liquid outlet of the first electric drive assembly 11.

[0058] Furthermore, the thermal management system also includes a first bypass branch 43, and the multi-way valve 55 also includes a sixth valve port and a seventh valve port. The two ends of the first bypass branch 43 are connected to the sixth valve port and the seventh valve port respectively, and the air conditioning circuit is connected to the first bypass branch 43.

[0059] For example, the sixth valve port is connected to the outlet of the first bypass branch 43, and the seventh valve port is connected to the inlet of the first bypass branch 43. The first bypass branch 43 is connected to the water side of the battery cooler 51.

[0060] Furthermore, the air conditioning circuit also includes a first air conditioning branch, which includes the refrigerant side of the evaporator 21, compressor 22, water-cooled condenser 53 and battery cooler 51 connected in series.

[0061] like Figure 3 As shown, the refrigerant circulation path of the first air conditioning branch is: compressor 22, refrigerant side of water-cooled condenser 53, liquid receiver 27, second coaxial tube L2, refrigerant side of battery cooler 51 and compressor 22.

[0062] Furthermore, the water side of the battery cooler 51 is connected to the battery circuit so that after the high-temperature refrigerant flowing out of the compressor 22 enters the refrigerant side of the battery cooler 51, it can exchange heat with the coolant in the water side of the battery cooler 51, thereby heating the battery pack assembly 41.

[0063] Furthermore, the air conditioning circuit also includes a third solenoid valve 58 and a fourth solenoid valve 59. The third solenoid valve 58 is located on the first air conditioning refrigeration circuit and at the liquid inlet of the non-subcooled condenser 23 to control the refrigerant entering the non-subcooled condenser 23. The fourth solenoid valve 59 is located on the first air conditioning branch and at the liquid inlet on the refrigerant side of the water-cooled condenser 53 to control the refrigerant entering the refrigerant side of the water-cooled condenser 53.

[0064] It should be understood that the refrigerant sides of the non-subcooled condenser 23 and the water-cooled condenser 53 are connected in parallel. That is, if both the third solenoid valve 58 and the fourth solenoid valve 59 are open, the refrigerant passing through the compressor 22 can simultaneously flow into the refrigerant sides of both the non-subcooled condenser 23 and the water-cooled condenser 53. When the third solenoid valve 58 is open and the fourth solenoid valve 59 is closed, the refrigerant passing through the compressor 22 can flow into the non-subcooled condenser 23, but cannot flow into the refrigerant side of the water-cooled condenser 53 through the fourth solenoid valve 59. When the third solenoid valve 58 is closed and the fourth solenoid valve 59 is open, the refrigerant passing through the compressor 22 cannot flow into the non-subcooled condenser 23 through the third solenoid valve 58, but can flow into the refrigerant side of the water-cooled condenser 53 through the fourth solenoid valve 59.

[0065] Furthermore, the refrigerant passing through the non-subcooled condenser 23 and the refrigerant passing through the water-cooled condenser 53 can simultaneously flow into the liquid storage tank 27.

[0066] In this embodiment, the first air conditioning heating circuit also includes a water-side water-cooled condenser 53 connected in series with the third water pump 24, heater 25, and warm air core 26, which can heat the passenger compartment through the waste heat of the battery pack assembly 41, and cool the battery pack assembly 41, the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 through the air conditioning circuit.

[0067] Furthermore, the first air conditioning heating circuit also includes the hot side of a plate heat exchanger 52 connected in series with the water side of the third water pump 24, heater 25, warm air core 26, and water-cooled condenser 53, so that the passenger compartment can be heated simultaneously by the waste heat of the battery pack assembly 41 and the heater 25, or the battery pack assembly 41 can be heated by the heater 25.

[0068] Furthermore, the first air conditioning heating circuit, the battery circuit, and the engine circuit are all connected via a multi-way valve 55.

[0069] Based on the switching of the valve ports of the multi-way valve 55 in the thermal management system of Embodiment 2 described above, this application can realize a variety of thermal management modes. Some of them are described below as examples: When the fifth and third ports of the multi-way valve 55 are connected and the other ports of the multi-way valve 55 are closed, the electric drive circuit can be circulated independently to achieve cooling of the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15.

[0070] For example, the cryogenic coolant flowing out of the cryogenic radiator 13 can simultaneously flow into the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15 under the action of the first water pump 12, so that after cooling the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15, it can flow back to the cryogenic radiator 13 through the fifth valve port and the third valve port.

[0071] When the fifth and fourth valve ports of the multi-way valve 55 are connected, the second and seventh valve ports are connected, the sixth and third valve ports are connected, and the other valve ports are closed, heat exchange can be achieved between the coolant of the electric drive circuit and the battery pack assembly 41.

[0072] For example, the coolant flowing out of the low-temperature radiator 13 can simultaneously flow into the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 under the action of the first water pump 12. After cooling the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15, it passes through the fifth valve port and the fourth valve port. Then, under the action of the second water pump 42, it passes through the cold side of the battery pack assembly 41, the second valve port and the seventh valve port, the water side of the battery cooler 51, the sixth valve port and the third valve port, and then flows back to the low-temperature radiator 13.

[0073] When the fifth and fourth valve ports of the multi-way valve 55 are connected, the second and seventh valve ports are connected, the sixth valve port is connected, and the first valve port is connected, while the other valve ports are closed, heat exchange between the coolant of the electric drive circuit and the battery pack assembly 41 can be achieved.

[0074] For example, the coolant flows simultaneously into the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 under the action of the first water pump 12. After cooling the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15, it passes through the fifth valve port and the fourth valve port. Then, under the action of the second water pump 12, it passes through the cold side of the battery pack assembly 41, the second valve port and the seventh valve port, the water side of the battery cooler 51, the sixth valve port and the third valve port, and then flows back into the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15.

[0075] When the fifth and seventh valve ports of the multi-way valve 55 are connected, the sixth and third valve ports are connected, and the other valve ports are closed, the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15 can be cooled by the refrigerant in the air conditioning circuit and the low-temperature radiator 13.

[0076] For example, the coolant flowing out of the low-temperature radiator 13 can simultaneously flow into the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15 under the action of the first water pump 12. After cooling the first electric drive assembly 11, the second electric drive assembly 14, and the generator assembly 15, it passes through the fifth and seventh valve ports and then enters the water side of the battery cooler 51. After heat exchange when the refrigerant from the air conditioning circuit enters the refrigerant side of the battery cooler 51, it flows back to the low-temperature radiator 13 through the sixth and third valve ports.

[0077] When the fifth and seventh valve ports of the multi-way valve 55 are connected, the sixth valve port and the first valve port are connected, and the other valve ports are closed, the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15 can be cooled by the refrigerant in the air conditioning circuit.

[0078] For example, the coolant can flow into the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15 simultaneously under the action of the first water pump 12. After cooling the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15, the coolant passes through the fifth valve port and the seventh valve port and then enters the water side of the battery cooler 51. After heat exchange when the refrigerant from the air conditioning circuit enters the refrigerant side of the battery cooler 51, the coolant flows back to the first electric drive assembly 11, the second electric drive assembly 14 and the generator assembly 15 through the sixth valve port and the first valve port.

[0079] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application.

[0081] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0082] Although embodiments of this application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of the patent coverage of this application.

Claims

1. A thermal management system, characterized in that, include: An electric drive circuit, the electric drive circuit comprising: The electric drive main circuit includes a first electric drive assembly and a low-temperature heat sink connected in series. The first electric drive branch includes a second electric drive assembly, which is connected in parallel with the first electric drive assembly; The second electric drive branch includes a generator assembly, which is connected in parallel with the first electric drive assembly and the second electric drive assembly.

2. The thermal management system according to claim 1, characterized in that, The thermal management system further includes a battery circuit, an air conditioning circuit, and an engine circuit. The battery circuit is connected to the air conditioning circuit and can exchange heat with the air conditioning circuit; the battery circuit is connected to the engine circuit and can exchange heat with the engine circuit; the engine circuit is connected to the air conditioning circuit and can provide heat to the air conditioning circuit.

3. The thermal management system according to claim 2, characterized in that, The thermal management system also includes a multi-way valve that connects the electric drive circuit and the battery circuit to enable the electric drive circuit to exchange heat with the battery circuit.

4. The thermal management system according to claim 3, characterized in that, The multi-port valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port. Two of the first valve port, the second valve port, the third valve port, and the fourth valve port are connected to the battery circuit, and the other two are connected to the electric drive circuit.

5. The thermal management system according to claim 3, characterized in that, The thermal management system further includes a third electric drive branch, and the multi-way valve includes a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port; One end of the third electric drive branch is connected to the first valve port, and the other end of the third electric drive branch is connected to the outlet of the low-temperature radiator; Two of the second valve port, the third valve port, the fourth valve port, and the fifth valve port are connected to the battery circuit, and the other two are connected to the electric drive circuit.

6. The thermal management system according to claim 5, characterized in that, The thermal management system further includes a first bypass branch, and the multi-way valve further includes a sixth valve port and a seventh valve port. The two ends of the first bypass branch are connected to the sixth valve port and the seventh valve port respectively, and the air conditioning circuit is connected to the first bypass branch.

7. The thermal management system according to claim 6, characterized in that, The air conditioning circuit includes: a first air conditioning refrigeration circuit and a first air conditioning branch circuit. The first air conditioning refrigeration circuit includes an evaporator, a compressor, and a non-subcooled condenser connected in series. The first air conditioning branch circuit includes a compressor, a refrigerant side of a water-cooled condenser, and a refrigerant side of a battery cooler connected in series. The water side of the battery cooler is connected to the battery circuit.

8. The thermal management system according to claim 7, characterized in that, The air conditioning circuit also includes a first air conditioning heating circuit, which includes a heater and a warm air core, and the heater and the warm air core are connected in series with the water side of the water-cooled condenser.

9. The thermal management system according to claim 7, characterized in that, Both the first air conditioning heating circuit and the battery circuit are connected to the engine circuit.

10. A vehicle, characterized in that, It includes a frame and a thermal management system as described in any one of claims 1-9, wherein the thermal management system is connected to the frame.

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