Pure electric vehicle type thermal management system and vehicle

Abstract

The utility model provides a thermal management system which is used for the technical field of vehicles, in particular to a pure electric vehicle type thermal management system which comprises a heat pump system, and the heat pump system exchanges heat with a passenger compartment and / or a battery pack; the cooling water system comprises a motor; a nine-way valve; the cooling water system can achieve heat exchange between the motor and the heat pump system through the nine-way valve and comprises a first cooling loop capable of only cooling the motor, and when a cooling branch flowing through the heat pump system is arranged on the first cooling loop, the first cooling loop is communicated with the heat pump system. The first cooling loop and the cooling branch form a second cooling loop capable of cooling the motor and refrigerating the air conditioner at the same time; and in the second cooling loop, the first cooling loop and the cooling branch flow through the nine-way valve. According to the pure electric vehicle type heat management system, the cooling water system communicates with the heat pump system through the nine-way valve, and heat exchange between the motor and the heat pump system is achieved. The utility model further provides a vehicle which comprises the pure electric vehicle type thermal management system.

Description

Technical Field

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

[0002] The water circuit structure of existing pure electric vehicles is becoming increasingly complex, with a surge in individual valve components, leading to increased costs and low efficiency. Due to the individual valve arrangement, the heat pump cannot simultaneously heat the passenger compartment and the battery. In low-temperature environments, the heat pump system can only absorb waste heat from the motor or air heat at the same time. In ultra-low-temperature environments, pure electric vehicles have a single heating method, relying solely on heaters, resulting in high energy consumption. Utility Model Content

[0003] In view of this, this application provides a thermal management system and vehicle for pure electric vehicles. By using a nine-way valve to connect the cooling water system and the heat pump system, heat exchange between the motor and the heat pump system is realized. This reduces individual valve components, improves integration, saves costs, and improves energy utilization.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A thermal management system for pure electric vehicles, comprising:

[0006] A heat pump system that exchanges heat with the crew compartment and / or battery pack;

[0007] Cooling water system, including the motor;

[0008] Nine-way valve;

[0009] The cooling water system can achieve heat exchange between the motor and the heat pump system through the nine-way valve;

[0010] The cooling water system includes a first cooling circuit that can cool only the motor. When a cooling branch that flows through the heat pump system is provided on the first cooling circuit, the first cooling circuit and the cooling branch form a second cooling circuit that can simultaneously cool the motor and provide air conditioning cooling. In the second cooling circuit, both the first cooling circuit and the cooling branch flow through the nine-way valve.

[0011] Optionally, the system includes a first cooling circuit, and the cooling water system further includes a first heat exchanger and a first water pump. In the first cooling circuit, the outlet of the motor is connected to the first port of the nine-way valve, the first port of the nine-way valve is connected to the seventh port of the nine-way valve, the seventh port of the nine-way valve is connected to the inlet of the first heat exchanger, the outlet of the first heat exchanger is connected to the first water pump, and the outlet of the first water pump is connected to the inlet of the motor.

[0012] Optionally, a second cooling circuit is also included, in which the outlet of the motor is connected to the first port of the nine-way valve, the first port of the nine-way valve is connected to the third port of the nine-way valve, the third port of the nine-way valve is connected to the first port of the four-way valve, the first port of the four-way valve is connected to the fourth port of the four-way valve, the fourth port of the four-way valve is connected to the eighth port of the nine-way valve, the eighth port of the nine-way valve is connected to the seventh port of the nine-way valve, the seventh port of the nine-way valve is connected to the inlet of the first heat exchanger, the outlet of the first heat exchanger is connected to the first water pump, and the outlet of the first water pump is connected to the inlet of the motor.

[0013] The outlet of the first water pump is connected in sequence to the shut-off valve, the second water pump, and the inlet of the second heat exchanger of the heat pump system. The outlet of the second heat exchanger is connected to the first port of the four-way valve.

[0014] Optionally, the heat pump system further includes a third heat exchanger, the outlet of which is connected to the third port of the four-way valve, the third port of which is connected to the second port of the four-way valve, the second port of which is connected to the inlet of the third water pump, the outlet of the third water pump being connected to the inlet of the battery pack, and the outlet of the battery pack being connected to the inlet of the third heat exchanger.

[0015] Optionally, it also includes a first heating circuit, in which the outlet of the motor is connected to the inlet of the third heat exchanger through the first port of the nine-way valve, the eighth port of the nine-way valve, the fourth port of the four-way valve, and the third port of the four-way valve in sequence; the outlet of the third heat exchanger is connected to the inlet of the first water pump through the second port of the nine-way valve and the ninth port of the nine-way valve in sequence; and the outlet of the first water pump is connected to the inlet of the motor.

[0016] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the fourth heat exchanger of the heat pump system via the third port and the fourth port of the nine-way valve, the outlet of the fourth heat exchanger is connected to the first port of the three-way valve, the second port of the three-way valve is connected to the inlet of the second water pump via the sixth port and the fifth port of the nine-way valve, and the outlet of the second water pump is connected to the inlet of the second heat exchanger.

[0017] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the battery pack via the first port of the four-way valve, the second port of the four-way valve, and the third water pump, and the outlet of the battery pack is connected to the third port of the three-way valve.

[0018] Optionally, a second heating circuit is also included. In the second heating circuit, the outlet of the motor is connected to the inlet of the third heat exchanger in sequence through the first port of the nine-way valve, the eighth port of the nine-way valve, the fourth port of the four-way valve, and the third port of the four-way valve. The outlet of the third heat exchanger is connected to the inlet of the first heat exchanger in sequence through the second port of the nine-way valve and the seventh port of the nine-way valve. The outlet of the first heat exchanger is connected to the inlet of the motor through the first water pump.

[0019] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the fourth heat exchanger of the heat pump system via the third port and the fourth port of the nine-way valve, the outlet of the fourth heat exchanger is connected to the first port of the three-way valve, the second port of the three-way valve is connected to the inlet of the second water pump via the sixth port and the fifth port of the nine-way valve, and the outlet of the second water pump is connected to the inlet of the second heat exchanger.

[0020] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the battery pack via the first port of the four-way valve, the second port of the four-way valve, and the third water pump, and the outlet of the battery pack is connected to the third port of the three-way valve.

[0021] Optionally, a third heating circuit is also included, in which the outlet of the motor is connected to the inlet of the first water pump in sequence through the first port and the ninth port of the nine-way valve, and the outlet of the first water pump is connected to the inlet of the motor.

[0022] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the fourth heat exchanger of the heat pump system via the third port and the fourth port of the nine-way valve, the outlet of the fourth heat exchanger is connected to the first port of the three-way valve, the second port of the three-way valve is connected to the inlet of the second water pump via the sixth port and the fifth port of the nine-way valve, and the outlet of the second water pump is connected to the inlet of the second heat exchanger.

[0023] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the battery pack via the first port of the four-way valve, the second port of the four-way valve, and the third water pump, and the outlet of the battery pack is connected to the third port of the three-way valve.

[0024] Optionally, a fourth heating circuit is also included. In the fourth heating circuit, the motor outlet is sequentially connected to the first port of the nine-way valve, the fifth port of the nine-way valve, and then connected to the inlet of the second heat exchanger via the second water pump. The outlet of the second heat exchanger is sequentially connected to the inlet of the fourth heat exchanger of the heat pump system via the third port of the nine-way valve, the fourth port of the nine-way valve, and the outlet of the fourth heat exchanger is connected to the first port of the three-way valve. The second port of the three-way valve is sequentially connected to the sixth port of the nine-way valve, the ninth port of the nine-way valve, and then connected to the inlet of the motor via the first water pump.

[0025] Furthermore, the outlet of the second heat exchanger is connected to the inlet of the battery pack via the first port of the four-way valve, the second port of the four-way valve, and the third water pump, and the outlet of the battery pack is connected to the third port of the three-way valve.

[0026] Optionally, when the first and second ports of the three-way valve are open and the third port is closed, only the fourth heat exchanger is heated; when the second and third ports of the three-way valve are open and the first port is closed, only the battery pack is heated; when the first, second, and third ports of the three-way valve are all open, the fourth heat exchanger and the battery pack are heated simultaneously.

[0027] This application uses a nine-way valve to connect the cooling water system and the heat pump system, constructing a thermal management water circuit architecture, which realizes heat exchange between the motor and the heat pump system, that is, heat exchange between the motor and the air conditioning, passenger compartment and battery of the heat pump system. This can reduce individual valve components, improve integration, save costs and improve energy utilization.

[0028] This application also provides a vehicle, including the pure electric vehicle thermal management system, which improves the thermal management efficiency of the vehicle. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the thermal management system for a pure electric vehicle according to this application;

[0031] Figure 2 A schematic diagram of a cooling loop that provides cooling only for the motor;

[0032] Figure 3A schematic diagram of a cooling loop that provides cooling to the motor, air conditioning, and the battery pack.

[0033] Figure 4 A schematic diagram of a heating cycle loop that utilizes waste heat from the motor to heat the passenger compartment and / or battery pack;

[0034] Figure 5 A schematic diagram of a heating cycle loop that utilizes waste heat from the motor and air heat to heat the passenger compartment and / or battery pack.

[0035] Figure 6 A schematic diagram of a heating cycle loop that uses a heat pump compressor to generate heat for the electric motor to store heat and heat the passenger compartment and / or battery pack.

[0036] Figure 7 A schematic diagram of a heating cycle loop that uses the electric motor to actively generate heat to heat the passenger compartment and / or battery pack.

[0037] exist Figures 1-7 middle:

[0038] 1. First heat exchanger; 2. First water pump; 3. Motor; 4. Three-way valve; 5. Nine-way valve; 6. Fourth heat exchanger; 7. Second water pump; 8. Second heat exchanger; 9. Four-way valve; 10. Third water pump; 11. Third heat exchanger; 12. Battery pack; 13. Shut-off valve; 14. Heat pump system. Detailed Implementation

[0039] This application provides a thermal management system and vehicle for a pure electric vehicle. By using a nine-way valve to connect the cooling water system and the heat pump system, heat exchange between the motor and the heat pump system is realized. This reduces individual valve components, improves integration, saves costs, and improves energy utilization.

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] like Figure 1 As shown, the thermal management system for pure electric vehicles provided in this application includes:

[0042] Heat pump system 14, heat pump system 14 exchanges heat with crew compartment and / or battery pack 12;

[0043] Cooling water system, including motor 3;

[0044] Nine-way valve 5;

[0045] The cooling water system can achieve heat exchange between the motor 3 and the heat pump system 14 through the nine-way valve 5;

[0046] The cooling water system includes a first cooling circuit that can cool only the motor 3. When a cooling branch is provided on the first cooling circuit that flows through the heat pump system 14, the first cooling circuit and the cooling branch form a second cooling circuit. The second cooling circuit can cool the motor 3 and provide air conditioning cooling at the same time. In the second cooling circuit, both the first cooling circuit and the cooling branch flow through the nine-way valve 5.

[0047] This application uses a nine-way valve 5 to connect the cooling water system and the heat pump system 14, constructing a thermal management water circuit architecture, which realizes heat exchange between the motor 3 and the heat pump system 14, that is, heat exchange between the air conditioning, passenger compartment and battery of the motor 3 and the heat pump system 14. Specifically, the cooling branch flowing through the nine-way valve 5 in the second cooling circuit realizes heat exchange between the motor 3 and the heat pump system 14. This can reduce individual valve body components, improve integration, save costs and improve energy utilization.

[0048] In a preferred embodiment, such as Figure 2 As shown, the cooling water system also includes a first heat exchanger 1 and a first water pump 2. In this embodiment, the first heat exchanger 1 is a low-temperature radiator. In the first cooling circuit, the outlet of the motor 3 is connected to the first port of the nine-way valve 5, the first port of the nine-way valve 5 is connected to the seventh port of the nine-way valve 5, the seventh port of the nine-way valve 5 is connected to the inlet of the first heat exchanger 1, the outlet of the first heat exchanger 1 is connected to the first water pump 2, and the outlet of the first water pump 2 is connected to the inlet of the motor 3.

[0049] When only motor 3 requires cooling, there is no need to exchange heat between motor 3 and heat pump system 14 through nine-way valve 5. In this case, it is only necessary to start the first cooling circuit and use the low-temperature radiator to cool motor 3.

[0050] In a preferred embodiment, such as Figure 3 As shown, the second cooling circuit is used when the temperature is high, requiring not only cooling of the motor 3 but also air conditioning. In the second cooling circuit, the outlet of the motor 3 is connected to the first port of the nine-way valve 5, the first port of the nine-way valve 5 is connected to the third port of the nine-way valve 5, the third port of the nine-way valve 5 is connected to the first port of the four-way valve 9, the first port of the four-way valve 9 is connected to the fourth port of the four-way valve 9, the fourth port of the four-way valve 9 is connected to the eighth port of the nine-way valve 5, the eighth port of the nine-way valve 5 is connected to the seventh port of the nine-way valve 5, the seventh port of the nine-way valve 5 is connected to the inlet of the first heat exchanger 1, the outlet of the first heat exchanger 1 is connected to the first water pump 2, and the outlet of the first water pump 2 is connected to the inlet of the motor 3. In this way, the motor 3 can be cooled through the first heat exchanger 1.

[0051] In addition, in the cooling branch, the outlet of the first water pump 2 is sequentially connected to the inlet of the second heat exchanger 8 (a water-cooled condenser in this embodiment) of the shut-off valve 13, the second water pump 7, and the heat pump system 14. The outlet of the second heat exchanger 8 is connected to the first port of the four-way valve 9. In this embodiment, the second heat exchanger 8 is a water-cooled condenser. In this branch, the high-temperature water output from the outlet of the second heat exchanger 8 of the heat pump system 14 mixes with the hot water output from the third port of the nine-way valve 5 and returns to the first cooling circuit through the four-way valve 9 and the nine-way valve 5 in sequence. After being cooled by the first heat exchanger 1 in the first cooling circuit, it re-enters the cooling branch, enters from the inlet of the second heat exchanger 8, and cools the second heat exchanger 8, thereby simultaneously achieving the cooling of the motor 3 and the second heat exchanger 8 by the first heat exchanger 1.

[0052] Furthermore, such as Figure 3 As shown, based on the second cooling circuit described above, due to the high temperature, there is also a need to cool the battery pack 12. The heat pump system 14 also includes a third heat exchanger 11 (chiller in this embodiment). The outlet of the third heat exchanger 11 is connected to the third port of the four-way valve 9. The third port of the four-way valve 9 is connected to the second port of the four-way valve 9. The second port of the four-way valve 9 is connected to the inlet of the third water pump 10. The outlet of the third water pump 10 is connected to the inlet of the battery pack 12. The outlet of the battery pack 12 is connected to the inlet of the third heat exchanger 11.

[0053] In this way, the heat of the battery pack 12 is exchanged with the heat pump system 14 through the third heat exchanger 11. When needed, the battery pack 12 can be cooled by the third heat exchanger 11 in addition to cooling the motor 3 and the air conditioner. Alternatively, the battery pack 12 can be cooled only by the motor 3 and the air conditioner without cooling the battery pack 12.

[0054] In a preferred embodiment, such as Figure 4 As shown, it also includes a first heating circuit. In the first heating circuit, the outlet of motor 3 is connected to the inlet of the third heat exchanger 11 through the first port of the nine-way valve 5, the eighth port of the nine-way valve 5, the fourth port of the four-way valve 9, and the third port of the four-way valve 9 in sequence. The outlet of the third heat exchanger 11 is connected to the inlet of the first water pump 2 through the second port of the nine-way valve 5 and the ninth port of the nine-way valve 5 in sequence. The outlet of the first water pump 2 is connected to the inlet of motor 3. This branch can connect motor 3 to the third heat exchanger 11, so that the waste heat of motor 3 can be absorbed by heat pump system 14 through the third heat exchanger 11.

[0055] Furthermore, the outlet of the second heat exchanger 8 is connected sequentially through the third port and the fourth port of the nine-way valve 5 to the inlet of the fourth heat exchanger 6 (in this embodiment, the warm air core, which can heat the passenger compartment) of the heat pump system 14. The outlet of the fourth heat exchanger 6 is connected to the first port of the three-way valve 4. The second port of the three-way valve 4 is connected sequentially through the sixth port and the fifth port of the nine-way valve 5 to the inlet of the second water pump 7. The outlet of the second water pump 7 is connected to the inlet of the second heat exchanger 8. This branch can supply heat to the fourth heat exchanger 6 through the second heat exchanger 8 of the heat pump system 14 to achieve heating of the passenger compartment.

[0056] Furthermore, the outlet of the second heat exchanger 8 is connected to the inlet of the battery pack 12 via the first port of the four-way valve 9, the second port of the four-way valve 9, and the third water pump 10 in sequence. The outlet of the battery pack 12 is connected to the third port of the three-way valve 4. This branch can supply heat to the battery pack 12 through the second heat exchanger 8 of the heat pump system 14.

[0057] Due to the limitations of refrigerant performance, when the ambient temperature is below -15°C, the heat pump system 14 cannot indirectly absorb heat from the air through the first heat exchanger 1. Therefore, the solution in this embodiment is suitable for use in ultra-low temperature (below -15°C) conditions. The heat pump system 14 absorbs the waste heat of the motor 3 and indirectly uses the waste heat of the motor 3 to provide some heat to the passenger compartment and / or battery pack 12, thus saving energy consumption.

[0058] In a preferred embodiment, such as Figure 5 As shown, it also includes a second heating circuit. In the second heating circuit, the outlet of motor 3 is connected to the inlet of the third heat exchanger 11 through the first port of the nine-way valve 5, the eighth port of the nine-way valve 5, the fourth port of the four-way valve 9, and the third port of the four-way valve 9 in sequence. The outlet of the third heat exchanger 11 is connected to the inlet of the first heat exchanger 1 through the second port of the nine-way valve 5 and the seventh port of the nine-way valve 5 in sequence. The outlet of the first heat exchanger 1 is connected to the inlet of motor 3 through the first water pump 2. This branch can connect motor 3 and the first heat exchanger 1 to the third heat exchanger 11 at the same time, so that the waste heat of motor 3 and the air heat absorbed by the first heat exchanger 1 can be absorbed by the heat pump system 14 through the third heat exchanger 11.

[0059] Furthermore, similar to the first heating circuit, the outlet of the second heat exchanger 8 is connected sequentially through the third port and the fourth port of the nine-way valve 5 to the inlet of the fourth heat exchanger 6 of the heat pump system 14. The outlet of the fourth heat exchanger 6 is connected to the first port of the three-way valve 4. The second port of the three-way valve 4 is connected sequentially through the sixth port and the fifth port of the nine-way valve 5 to the inlet of the second water pump 7. The outlet of the second water pump 7 is connected to the inlet of the second heat exchanger 8. This branch can supply heat to the fourth heat exchanger 6 through the second heat exchanger 8 of the heat pump system 14 to achieve heating of the crew cabin.

[0060] In addition, similar to the first heating circuit, the outlet of the second heat exchanger 8 is connected to the inlet of the battery pack 12 via the first port of the four-way valve 9, the second port of the four-way valve 9, and the third water pump 10. The outlet of the battery pack 12 is connected to the third port of the three-way valve 4. This branch can supply heat to the battery pack 12 through the second heat exchanger 8 of the heat pump system 14.

[0061] In this embodiment, unlike the previous embodiment which only utilizes the waste heat of the motor 3, the waste heat of the motor 3 and the air heat absorbed by the first heat exchanger 1 are used to supply heat to the heat pump system 14 through the third heat exchanger 11 by using different connection methods between the cooling water system and the ports of the nine-way valve 5. This increases the operating temperature range of the heat pump system 14, improves energy utilization, reduces low-temperature energy consumption, and improves endurance.

[0062] In a preferred embodiment, such as Figure 6 As shown, it also includes a third heating circuit. In the third heating circuit, the outlet of motor 3 is connected to the inlet of the first water pump 2 through the first port and the ninth port of the nine-way valve 5 in sequence. The outlet of the first water pump 2 is connected to the inlet of motor 3. In this branch, motor 3 is in heat storage mode and does not output heat to heat pump system 14.

[0063] Furthermore, the outlet of the second heat exchanger 8 is connected sequentially through the third port and the fourth port of the nine-way valve 5 to the inlet of the fourth heat exchanger 6 of the heat pump system 14. The outlet of the fourth heat exchanger 6 is connected to the first port of the three-way valve 4. The second port of the three-way valve 4 is connected sequentially through the sixth port and the fifth port of the nine-way valve 5 to the inlet of the second water pump 7. The outlet of the second water pump 7 is connected to the inlet of the second heat exchanger 8. This branch can generate heat through the compressor of the heat pump system 14 and supply heat to the fourth heat exchanger 6 through the second heat exchanger 8 to achieve heating of the crew cabin.

[0064] Furthermore, the outlet of the second heat exchanger 8 is connected to the inlet of the battery pack 12 via the first port of the four-way valve 9, the second port of the four-way valve 9, and the third water pump 10. The outlet of the battery pack 12 is connected to the third port of the three-way valve 4. This branch can generate heat through the compressor of the heat pump system 14 and supply heat to the battery pack 12 through the second heat exchanger 8.

[0065] Thus, this heat pump system 14 has a compressor heat generation function, and the cooling, battery and air conditioning system water circuits are connected through the nine-way valve 5, which expands the heating temperature range, improves the heating rate in low-temperature environments, and can eliminate the PTC (heater) in the existing technology, thereby reducing costs.

[0066] In a preferred embodiment, such as Figure 7As shown, it also includes a fourth heating circuit. In the fourth heating circuit, the outlet of motor 3 is sequentially connected to the first port of nine-way valve 5, the fifth port of nine-way valve 5, and then connected to the inlet of the second heat exchanger 8 via the second water pump 7. The outlet of the second heat exchanger 8 is sequentially connected to the inlet of the fourth heat exchanger 6 of the heat pump system 14 via the third port of nine-way valve 5, the fourth port of nine-way valve 5, and the outlet of the fourth heat exchanger 6 is connected to the first port of three-way valve 4. The second port of three-way valve 4 is sequentially connected to the sixth port of nine-way valve 5, the ninth port of nine-way valve 5, and then connected to the inlet of motor 3 via the first water pump 2. In this branch, motor 3 actively generates heat and, together with the second heat exchanger 8, supplies heat to the fourth heat exchanger 6, thereby heating the passenger compartment.

[0067] Furthermore, the outlet of the second heat exchanger 8 is connected to the inlet of the battery pack 12 via the first port of the four-way valve 9, the second port of the four-way valve 9, and the third water pump 10 in sequence; the outlet of the battery pack 12 is connected to the third port of the three-way valve 4; in this branch, the heat pump system 14 supplies heat to the battery pack 12 through the second heat exchanger 8.

[0068] In addition to the heat generation function of the compressor, this heat pump system 14 also has the active heat generation function of the motor 3. The cooling, battery and air conditioning system water circuits are connected through the nine-way valve 5, which expands the heating temperature range and improves the heating rate in low temperature environments. At the same time, the PTC (heater) in the existing technology can be eliminated, thereby reducing costs.

[0069] In a preferred embodiment, such as Figures 4-7 As shown, when the first and second ports of the three-way valve 4 are open and the third port is closed, only the fourth heat exchanger 6 is heated; when the second and third ports of the three-way valve 4 are open and the first port is closed, only the battery pack 12 is heated; when the first, second, and third ports of the three-way valve 4 are all open, the fourth heat exchanger 6 and the battery pack 12 are heated simultaneously.

[0070] The heating modes of the passenger compartment and the battery pack 12 are independently controlled, allowing the driver to freely choose according to actual working conditions. In this embodiment, the heating modes of the passenger compartment and the battery pack 12 can be freely switched by combining the opening and closing of each port of the three-way valve 4, thus avoiding heat waste.

[0071] This application also provides a vehicle including the aforementioned pure electric vehicle thermal management system, which improves the thermal management efficiency of the vehicle.

[0072] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0073] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the word “or” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0074] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled or recombined. These disassemblies or recombinations should be considered as equivalent solutions of this application.

[0075] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0076] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0077] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A thermal management system for a pure electric vehicle, characterized in that, include: A heat pump system (14) exchanges heat with the crew compartment and / or the battery pack (12); Cooling water system, including motor (3); Nine-way valve (5); The cooling water system can achieve heat exchange between the motor (3) and the heat pump system (14) through the nine-way valve; The cooling water system includes a first cooling circuit that can cool only the motor (3). When a cooling branch is provided on the first cooling circuit that flows through the heat pump system (14), the first cooling circuit and the cooling branch form a second cooling circuit that can simultaneously cool the motor (3) and provide air conditioning cooling. In the second cooling circuit, both the first cooling circuit and the cooling branch flow through the nine-way valve (5).

2. The thermal management system for pure electric vehicles according to claim 1, characterized in that, The cooling water system also includes a first heat exchanger (1) and a first water pump (2). In the first cooling circuit, the outlet of the motor (3) is connected to the first port of the nine-way valve (5), the first port of the nine-way valve (5) is connected to the seventh port of the nine-way valve (5), the seventh port of the nine-way valve (5) is connected to the inlet of the first heat exchanger (1), the outlet of the first heat exchanger (1) is connected to the first water pump (2), and the outlet of the first water pump (2) is connected to the inlet of the motor (3).

3. The thermal management system for pure electric vehicles according to claim 2, characterized in that, In the second cooling circuit, the outlet of the motor (3) is connected to the first port of the nine-way valve (5), the first port of the nine-way valve (5) is connected to the third port of the nine-way valve (5), the third port of the nine-way valve (5) is connected to the first port of the four-way valve (9), the first port of the four-way valve (9) is connected to the fourth port of the four-way valve (9), the fourth port of the four-way valve (9) is connected to the eighth port of the nine-way valve (5), the eighth port of the nine-way valve (5) is connected to the seventh port of the nine-way valve (5), the seventh port of the nine-way valve (5) is connected to the inlet of the first heat exchanger (1), the outlet of the first heat exchanger (1) is connected to the first water pump (2), and the outlet of the first water pump (2) is connected to the inlet of the motor (3). In the cooling branch, the outlet of the first water pump (2) is connected in sequence to the shut-off valve (13), the inlet of the second water pump (7) and the second heat exchanger (8) of the heat pump system (14), and the outlet of the second heat exchanger (8) is connected to the first port of the four-way valve (9).

4. The thermal management system for pure electric vehicles according to claim 3, characterized in that, The heat pump system (14) further includes a third heat exchanger (11), the outlet of which is connected to the third port of the four-way valve (9), the third port of which is connected to the second port of the four-way valve (9), the second port of which is connected to the inlet of the third water pump (10), the outlet of which is connected to the inlet of the battery pack (12), and the outlet of which is connected to the inlet of the third heat exchanger (11).

5. The thermal management system for pure electric vehicles according to claim 4, characterized in that, It also includes a first heating circuit, in which the outlet of the motor (3) is connected to the inlet of the third heat exchanger (11) in sequence through the first port of the nine-way valve (5), the eighth port of the nine-way valve (5), the fourth port of the four-way valve (9), and the third port of the four-way valve (9). The outlet of the third heat exchanger (11) is connected to the inlet of the first water pump (2) in sequence through the second port of the nine-way valve (5) and the ninth port of the nine-way valve (5). The outlet of the first water pump (2) is connected to the inlet of the motor (3). Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the fourth heat exchanger (6) of the heat pump system (14) through the third port and the fourth port of the nine-way valve (5) in sequence, the outlet of the fourth heat exchanger (6) is connected to the first port of the three-way valve (4), the second port of the three-way valve (4) is connected to the inlet of the second water pump (7) through the sixth port and the fifth port of the nine-way valve (5) in sequence, and the outlet of the second water pump (7) is connected to the inlet of the second heat exchanger (8); Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the battery pack (12) via the first port of the four-way valve (9), the second port of the four-way valve (9), and the third water pump (10), and the outlet of the battery pack (12) is connected to the third port of the three-way valve (4).

6. The thermal management system for pure electric vehicles according to claim 4, characterized in that, It also includes a second heating circuit. In the second heating circuit, the outlet of the motor (3) is connected to the inlet of the third heat exchanger (11) in sequence through the first port of the nine-way valve (5), the eighth port of the nine-way valve (5), the fourth port of the four-way valve (9), and the third port of the four-way valve (9). The outlet of the third heat exchanger (11) is connected to the inlet of the first heat exchanger (1) in sequence through the second port of the nine-way valve (5) and the seventh port of the nine-way valve (5). The outlet of the first heat exchanger (1) is connected to the inlet of the motor (3) through the first water pump (2). Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the fourth heat exchanger (6) of the heat pump system (14) through the third port and the fourth port of the nine-way valve (5) in sequence, the outlet of the fourth heat exchanger (6) is connected to the first port of the three-way valve (4), the second port of the three-way valve (4) is connected to the inlet of the second water pump (7) through the sixth port and the fifth port of the nine-way valve (5) in sequence, and the outlet of the second water pump (7) is connected to the inlet of the second heat exchanger (8); Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the battery pack (12) via the first port of the four-way valve (9), the second port of the four-way valve (9), and the third water pump (10), and the outlet of the battery pack (12) is connected to the third port of the three-way valve (4).

7. The thermal management system for pure electric vehicles according to claim 4, characterized in that, It also includes a third heating circuit, in which the outlet of the motor (3) is connected to the inlet of the first water pump (2) through the first port and the ninth port of the nine-way valve (5) in sequence, and the outlet of the first water pump (2) is connected to the inlet of the motor (3). Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the fourth heat exchanger (6) of the heat pump system (14) through the third port and the fourth port of the nine-way valve (5) in sequence, the outlet of the fourth heat exchanger (6) is connected to the first port of the three-way valve (4), the second port of the three-way valve (4) is connected to the inlet of the second water pump (7) through the sixth port and the fifth port of the nine-way valve (5) in sequence, and the outlet of the second water pump (7) is connected to the inlet of the second heat exchanger (8); Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the battery pack (12) via the first port of the four-way valve (9), the second port of the four-way valve (9), and the third water pump (10), and the outlet of the battery pack (12) is connected to the third port of the three-way valve (4).

8. The thermal management system for pure electric vehicles according to claim 4, characterized in that, It also includes a fourth heating circuit, in which the outlet of the motor (3) is sequentially connected to the first port of the nine-way valve (5), the fifth port of the nine-way valve (5), and the inlet of the second heat exchanger (8) via the second water pump (7). The outlet of the second heat exchanger (8) is sequentially connected to the inlet of the fourth heat exchanger (6) of the heat pump system (14) via the third port of the nine-way valve (5) and the fourth port of the nine-way valve (5). The outlet of the fourth heat exchanger (6) is connected to the first port of the three-way valve (4). The second port of the three-way valve (4) is sequentially connected to the inlet of the motor (3) via the sixth port of the nine-way valve (5), the ninth port of the nine-way valve (5), and the inlet of the motor (3) via the first water pump (2). Furthermore, the outlet of the second heat exchanger (8) is connected to the inlet of the battery pack (12) via the first port of the four-way valve (9), the second port of the four-way valve (9), and the third water pump (10), and the outlet of the battery pack (12) is connected to the third port of the three-way valve (4).

9. The thermal management system for pure electric vehicles according to any one of claims 5-8, characterized in that, When the first and second ports of the three-way valve (4) are open and the third port is closed, only the fourth heat exchanger (6) is heated; when the second and third ports of the three-way valve (4) are open and the first port is closed, only the battery pack (12) is heated; when the first, second and third ports of the three-way valve (4) are all open, the fourth heat exchanger (6) and the battery pack (12) are heated simultaneously.

10. A vehicle, characterized in that, Includes the thermal management system for pure electric vehicles as described in claim 9.

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