Thermal management system and vehicle

Abstract

The invention relates to a thermal management system and a vehicle, the thermal management system comprises a refrigerant loop and a cooling liquid loop, the refrigerant loop comprises a first refrigerant loop and a second refrigerant loop, and the cooling liquid loop comprises a first cooling liquid loop; the first cooling liquid loop comprises a first loop, and the first loop comprises an electric drive assembly and a cooling liquid channel of a first heat exchange piece which are connected. The first refrigerant loop comprises a second loop, and the second loop comprises a first compressor, a refrigerant channel of the second heat exchange piece and a refrigerant channel of the first heat exchange piece which are connected; the first cooling liquid loop comprises a third loop, the third loop comprises an electric drive assembly and a cooling liquid channel of a third heat exchange part which are connected, the second refrigerant loop comprises a fourth loop, and the fourth loop comprises a second compressor, a refrigerant channel of a fourth heat exchange part and a refrigerant channel of the third heat exchange part which are connected. Waste heat utilization of the electric drive assembly is achieved through the second loop or the fourth loop, and power consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a thermal management system and a vehicle. BACKGROUND

[0002] For new energy vehicles, the whole vehicle thermal management system undertakes the function of heat management for the passenger compartment, battery pack and the like.

[0003] In a low temperature environment, the whole vehicle thermal management system needs to provide sufficient heat for the passenger compartment to maintain the warmth in the compartment, and also needs to heat the power battery pack. In a high temperature environment, the whole vehicle thermal management system needs to cool the passenger compartment and the battery pack.

[0004] How to balance the heating power consumption and heating reliability in low temperature is a problem to be solved at present. SUMMARY

[0005] One of the purposes of the present application is to provide a thermal management system to balance the heating power consumption and heating reliability in low temperature; the second purpose is to provide a vehicle.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] A thermal management system, comprising a refrigerant circuit through which a refrigerant flows and a coolant circuit through which a coolant flows, the refrigerant circuit comprising a first refrigerant circuit and a second refrigerant circuit, and the coolant circuit comprising a first coolant circuit;

[0008] The first coolant circuit comprises a first circuit, and the first circuit comprises a coolant passage of an electric drive assembly and a first heat exchange member connected in series; the first refrigerant circuit comprises a second circuit, and the second circuit comprises a first compressor, a refrigerant passage of the second heat exchange member and a refrigerant passage of the first heat exchange member connected in series;

[0009] The first coolant circuit comprises a third circuit, and the third circuit comprises a coolant passage of the electric drive assembly and a third heat exchange member connected in series; the second refrigerant circuit comprises a fourth circuit, and the fourth circuit comprises a second compressor, a refrigerant passage of a fourth heat exchange member and a refrigerant passage of the third heat exchange member connected in series;

[0010] The second heat exchange member and the fourth heat exchange member both have a coolant passage and are both used to transfer heat to a first device and / or a second device by the coolant.

[0011] Further, the thermal management system further comprises a cooperative circuit, and the cooperative circuit comprises a first pump body, a first three-way valve, a coolant passage of the first heat exchange member, a second three-way valve and a coolant passage of the fourth heat exchange member connected in series.

[0012] Further, the first device is a heater core, the cooling liquid circuit comprises a second cooling liquid circuit, the second cooling liquid circuit comprises a seventh circuit, and the seventh circuit comprises cooling liquid passages of the heater core and the second heat exchange member connected in series.

[0013] The second cooling liquid circuit comprises an eighth circuit, and the eighth circuit comprises cooling liquid passages of the heater core and the fourth heat exchange member 21 connected in series.

[0014] Further, the seventh circuit comprises a third pump body, a fifth three-way valve, the heater core, a sixth three-way valve, a seventh three-way valve, the cooling liquid passage of the second heat exchange member, and an eighth three-way valve connected in series.

[0015] The eighth circuit comprises the third pump body, the fifth three-way valve, the heater core, the sixth three-way valve, the seventh three-way valve, a second three-way valve, the cooling liquid passage of the fourth heat exchange member, a first three-way valve, and the eighth three-way valve connected in series.

[0016] Further, the second device is a battery pack, the cooling liquid circuit comprises a third cooling liquid circuit, the third cooling liquid circuit comprises a seventh circuit, and the seventh circuit comprises a fourth pump body, a cooling liquid passage of the battery pack, and a battery cooling liquid passage of a fifth heat exchange member connected in series.

[0017] The third cooling liquid circuit comprises an eighth circuit, and the eighth circuit comprises a heat exchange cooling liquid passage of the fifth heat exchange member and the cooling liquid passage of the second heat exchange member connected in series.

[0018] The third cooling liquid circuit comprises a ninth circuit, and the ninth circuit comprises the heat exchange cooling liquid passage of the fifth heat exchange member and the cooling liquid passage of the fourth heat exchange member connected in series.

[0019] Further, the eighth circuit comprises the third pump body, the fifth three-way valve, the heat exchange cooling liquid passage of the fifth heat exchange member, a sixth three-way valve, a seventh three-way valve, the cooling liquid passage of the second heat exchange member, and the eighth three-way valve connected in series.

[0020] The ninth circuit comprises the third pump body, the fifth three-way valve, the heat exchange cooling liquid passage of the fifth heat exchange member, the sixth three-way valve, the seventh three-way valve, a second three-way valve, the cooling liquid passage of the fourth heat exchange member, a first three-way valve, and the eighth three-way valve connected in series.

[0021] Further, an electric heater is arranged between the eighth three-way valve and the third pump body.

[0022] Further, the first circuit includes the second pump body, the third three-way valve, the cooling liquid passage of the first heat exchange member, the fourth three-way valve, the electric drive assembly, and the cooling liquid passage of the third heat exchange member connected in sequence.

[0023] The third circuit includes the second pump body, the third three-way valve, the fourth three-way valve, the electric drive assembly, and the cooling liquid passage of the third heat exchange member connected in sequence.

[0024] Further, the first circuit has a first state and a second state. In the first state, the first circuit includes the second pump body, the cooling liquid passage of the first heat exchange member, the electric drive assembly, the cooling liquid passage of the third heat exchange member, the ninth three-way valve, the bypass pipeline, and the thirteenth valve connected in sequence.

[0025] In the second state, the first circuit includes the second pump body, the cooling liquid passage of the first heat exchange member, the electric drive assembly, the cooling liquid passage of the third heat exchange member, the ninth three-way valve, the sixth heat exchange member, and the thirteenth valve connected in sequence.

[0026] Further, the third circuit has a third state and a fourth state. In the third state, the third circuit includes the second pump body, the electric drive assembly, the cooling liquid passage of the third heat exchange member, the ninth three-way valve, the bypass pipeline, and the thirteenth valve connected in sequence.

[0027] In the fourth state, the third circuit includes the second pump body, the electric drive assembly, the cooling liquid passage of the third heat exchange member, the ninth three-way valve, the sixth heat exchange member, and the thirteenth valve connected in sequence.

[0028] Further, the specific volume of the refrigerant circulating in the second refrigerant circuit is less than the specific volume of the refrigerant circulating in the first refrigerant circuit.

[0029] Further, the second device is a battery pack, and the third cooling liquid circuit includes a seventh circuit. The seventh circuit includes the fourth pump body, the cooling liquid passage of the battery pack, the cooling liquid passage of the seventh heat exchange member, the cooling liquid passage of the eighth heat exchange member, and the battery cooling liquid passage of the fifth heat exchange member connected in sequence.

[0030] The first refrigerant circuit includes an eleventh circuit. The eleventh circuit includes the first compressor, the refrigerant passage of the second heat exchange member, a first electronic expansion valve, a first external condenser, a second electronic expansion valve, and the refrigerant passage of the eighth heat exchange member connected in sequence.

[0031] The second refrigerant circuit includes a twelfth circuit. The twelfth circuit includes the second compressor, the refrigerant passage of the fourth heat exchange member, a third electronic expansion valve, a second external condenser, a fourth electronic expansion valve, and the refrigerant passage of the seventh heat exchange member connected in sequence.

[0032] Further, the first refrigerant circuit comprises a thirteenth circuit comprising the first compressor, the refrigerant passage of the second heat exchange element, the first electronic expansion valve, the first external condenser, a fifth electronic expansion valve and an evaporator connected in series.

[0033] Further, the first coolant circuit comprises a tenth circuit comprising the first compressor, the refrigerant passage of the second heat exchange element, a first electronic expansion valve, a first external condenser and a stop valve connected in series.

[0034] A vehicle comprising the thermal management system as described above.

[0035] Advantages of the present application:

[0036] In the embodiments of the present application, the waste heat utilization of the electric drive assembly is realized through the second circuit in the first refrigerant circuit or the fourth circuit in the second refrigerant circuit, so that the operating power of the electric heater can be reduced as much as possible or the electric heater is not used, thereby reducing power consumption, improving the cruising range of the vehicle and reducing the anxiety about the cruising range. In addition, through the redundant design of the second circuit and the fourth circuit, when an abnormality occurs in one of the circuits, the other circuit can realize the above functions, so as to ensure the reliability of low-power heating. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A schematic diagram of the first refrigerant circuit shown in solid lines in the thermal management system provided by the embodiments of the present application;

[0038] Figure 2 A schematic diagram of the second refrigerant circuit shown in solid lines in the thermal management system provided by the embodiments of the present application;

[0039] Figure 3 A schematic diagram of the coolant circuit shown in solid lines in the thermal management system provided by the embodiments of the present application;

[0040] Figure 4 A schematic diagram of the third circuit in the first state in the thermal management system provided by the embodiments of the present application;

[0041] Figure 5 A schematic diagram of the seventh circuit in the thermal management system provided by the embodiments of the present application;

[0042] Figure 6 A schematic diagram of the seventh circuit in the thermal management system provided by the embodiments of the present application;

[0043] Figure 7 A schematic diagram of the seventh circuit and the eighth circuit in the thermal management system provided by the embodiments of the present application;

[0044] Figure 8 Schematic diagram of a first operating mode of a thermal management system provided for embodiments of the application;

[0045] Figure 9 Schematic diagram of a second operating mode of a thermal management system provided for embodiments of the application;

[0046] Figure 10 Schematic diagram of a third operating mode of a thermal management system provided for embodiments of the application;

[0047] Figure 11 Schematic diagram of a fourth operating mode of a thermal management system provided for embodiments of the application;

[0048] Figure 12 Schematic diagram of a fifth operating mode of a thermal management system provided for embodiments of the application;

[0049] Figure 13 Schematic diagram of a sixth operating mode of a thermal management system provided for embodiments of the application;

[0050] Figure 14 Schematic diagram of a seventh operating mode of a thermal management system provided for embodiments of the application;

[0051] Figure 15 Schematic diagram of an eighth operating mode of a thermal management system provided for embodiments of the application;

[0052] Figure 16 Schematic diagram of a ninth operating mode of a thermal management system provided for embodiments of the application;

[0053] Figure 17 Schematic diagram of a tenth operating mode of a thermal management system provided for embodiments of the application;

[0054] Figure 18 Schematic diagram of an eleventh operating mode of a thermal management system provided for embodiments of the application;

[0055] Figure 19 Schematic diagram of a twelfth operating mode of a thermal management system provided for embodiments of the application;

[0056] Figure 20 Schematic diagram of a thirteenth operating mode of a thermal management system provided for embodiments of the application;

[0057] Figure 21 Schematic diagram of a fourteenth operating mode of a thermal management system provided for embodiments of the application;

[0058] Figure 22 Schematic diagram of a fifteenth operating mode of a thermal management system provided for embodiments of the application;

[0059] Figure 23 Schematic diagram of a sixteenth operation mode of the heat management system provided for the embodiment of the present application;

[0060] Figure 24 Schematic diagram of a seventeenth operation mode of the heat management system provided for the embodiment of the present application;

[0061] Figure 25 Schematic diagram of an eighteenth operation mode of the heat management system provided for the embodiment of the present application;

[0062] Figure 26 Schematic diagram of a nineteenth operation mode of the heat management system provided for the embodiment of the present application;

[0063] Figure 27 Schematic diagram of a twentieth operation mode of the heat management system provided for the embodiment of the present application;

[0064] Figure 28 Schematic diagram of a twenty-first operation mode of the heat management system provided for the embodiment of the present application;

[0065] Figure 29 Schematic diagram of a twenty-second operation mode of the heat management system provided for the embodiment of the present application.

[0066] Explanation of reference signs:

[0067] 1- second pump body, 2- third three-way valve, 3- fourth three-way valve, 4- electric drive assembly, 5- third heat exchange element, 6- ninth three-way valve, 7- sixth heat exchange element, 8- thirteenth three-way valve, 9- bypass pipeline, 10- first heat exchange element, 11- first compressor, 12- second heat exchange element, 13- sixth electronic expansion valve, 14- stop valve, 15- first electronic expansion valve, 16- first external condenser, 17- second electronic expansion valve, 18- fifth electronic expansion valve, 19- evaporator;

[0068] 20- second compressor, 21- fourth heat exchange element, 22- seventh electronic expansion valve, 23- third electronic expansion valve, 24- second external condenser, 25- fourth electronic expansion valve, 26- first pump body, 27- first three-way valve, 28- second three-way valve, 29- third pump body, 30- fifth three-way valve, 31- warm air core, 32- sixth three-way valve, 33- seventh three-way valve, 34- eighth three-way valve, 35- electric heater, 36- fourth pump body, 37- battery pack, 38- seventh heat exchange element, 39- eighth heat exchange element, 40- fifth heat exchange element;

[0069] 41 - blower, 42 - first fan, 43 - second fan, 44 - air intake grille, 45 - first temperature sensor, 46 - second temperature sensor, 47 - third temperature sensor, 48 - fourth temperature sensor, 49 - fifth temperature sensor, 50 - first pressure temperature sensor, 51 - second pressure temperature sensor, 52 - third pressure temperature sensor, 53 - fourth pressure temperature sensor, 54 - fifth pressure temperature sensor, 55 - sixth pressure temperature sensor, 56 - seventh pressure temperature sensor, 57 - eighth pressure temperature sensor, 58 - ninth pressure temperature sensor, 59 - tenth pressure temperature sensor, 60 - eleventh pressure temperature sensor;

[0070] A - first circuit, B - second circuit, C - third circuit, D - fourth circuit, E - fifth circuit, F - sixth circuit, G - seventh circuit, H - eighth circuit, J - ninth circuit, K - tenth circuit, L - eleventh circuit, M - twelfth circuit, N - thirteenth circuit, O - cooperative circuit. DETAILED DESCRIPTION

[0071] Other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied by means of other different specific embodiments, and various modifications or changes can be made to the details of the present specification based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for the purpose of illustrating the present application, and are not intended to limit the protection scope of the present application.

[0072] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The actual implementation of each component may be a random change in type, number and proportion, and the layout type of the components may also be more complex.

[0073] In a low-temperature environment, the whole vehicle thermal management system needs to provide sufficient heat to the passenger cabin to maintain the cabin warm, and also needs to heat the power battery pack. In a high-temperature environment, the whole vehicle thermal management system needs to cool the passenger cabin and the battery pack. How to balance the heating power consumption and heating reliability in low temperature is a problem that needs to be solved at present. In order to solve the above problems, the present application embodiment proposes a thermal management system and a vehicle. The above-mentioned thermal management system and vehicle will be described in detail below.

[0074] In a first aspect, with reference to Figures 1 to 3 , Figures 8 to 10The heat management system provided by the embodiment of the application is applied to a vehicle, and the heat management system comprises a refrigerant circuit in which refrigerant flows and a coolant circuit in which coolant flows, the refrigerant circuit comprises a first refrigerant circuit and a second refrigerant circuit. The coolant circuit comprises a first coolant circuit, the first coolant circuit comprises a first circuit A, the first circuit A comprises a coolant channel of the electric drive assembly 4 and a first heat exchange member 10 connected to each other, the first refrigerant circuit comprises a second circuit B, the second circuit B comprises a refrigerant channel of a first compressor 11, a refrigerant channel of a second heat exchange member 12 and a refrigerant channel of the first heat exchange member 10 connected to each other, and the second heat exchange member 12 has a coolant channel and is used for transferring heat to the first device and / or the second device through the coolant, and the heat transfer can be direct heat transfer or indirect heat transfer.

[0075] With reference to Figures 11 to 13 The first coolant circuit comprises a third circuit C, the third circuit C comprises a coolant channel of the electric drive assembly 4 and a third heat exchange member 5 connected to each other, the second refrigerant circuit comprises a fourth circuit D, the fourth circuit D comprises a refrigerant channel of a second compressor 20, a refrigerant channel of a fourth heat exchange member 21 and a refrigerant channel of the third heat exchange member 5 connected to each other, the fourth heat exchange member 21 has a coolant channel and is used for transferring heat to the first device and / or the second device through the coolant, and the heat transfer can be direct heat transfer or indirect heat transfer.

[0076] The first device can be a heater core 31, and the second device can be a battery pack 37. The first refrigerant circuit can be used for realizing passenger compartment refrigeration, battery pack refrigeration, passenger compartment and battery pack refrigeration, passenger compartment heating, battery pack heating, passenger compartment and battery pack heating. The second refrigerant circuit can be used for realizing battery pack refrigeration, passenger compartment heating, battery pack heating, passenger compartment and battery pack heating.

[0077] The electric drive assembly 4 can comprise a motor and its accessories. For the coolant flowing in the first circuit A or the third circuit C, the coolant can be cooled through the refrigerant circuit or the following-described sixth heat exchange member 7, so that the temperature of the electric drive assembly is reduced, and the electric drive assembly works in a suitable temperature range. The first heat exchange member 10 is a liquid-refrigerant heat exchanger, which has a coolant channel and a refrigerant channel, and the first heat exchange member 10 can be a plate heat exchanger in particular. The third heat exchange member 5 is a liquid-refrigerant heat exchanger, which has a coolant channel and a refrigerant channel, and the third heat exchange member 5 can be a plate heat exchanger in particular. The first circuit A or the third circuit C further comprises a second pump body 1, which is used for providing power for circulation of the coolant.

[0078] The first compressor 11 is mainly used to suck low-pressure and low-temperature refrigerant gas, compress it into high-pressure and high-temperature refrigerant gas, and provide power for the circulation of the refrigerant. The second heat exchange member 12 is a liquid-refrigerant heat exchanger, which has a cooling liquid passage and a refrigerant passage, and specifically can be a water-cooled condenser. The second compressor 20 has the same function as the first compressor 11, and will not be described here. The fourth heat exchange member 21 is a liquid-refrigerant heat exchanger, which has a cooling liquid passage and a refrigerant passage, and specifically can be a water-cooled condenser.

[0079] In the flow direction of the refrigerant, the second circuit B includes the first compressor 11, the refrigerant passage of the second heat exchange member 12, the sixth electronic expansion valve 13, the refrigerant passage of the first heat exchange member 10 and the stop valve 14 connected in sequence. When the second circuit B is opened, the sixth electronic expansion valve 13 and the stop valve 14 are opened. A second pressure and temperature sensor 51 is arranged on the pipeline connecting the refrigerant passage of the first heat exchange member 10 and the stop valve 14. The superheat of the refrigerant can be calculated according to the temperature and pressure detected by the second pressure and temperature sensor 51, and the opening of the sixth electronic expansion valve 13 is controlled according to the superheat of the refrigerant. A first pressure and temperature sensor 50 is arranged on the pipeline connecting the first compressor 11 and the refrigerant passage of the second heat exchange member 12, and a sixth pressure and temperature sensor 55 close to the first compressor 11 is arranged on the pipeline connecting the stop valve 14 and the first compressor 11.

[0080] In the flow direction of the refrigerant, the fourth circuit D includes the second compressor 20, the refrigerant passage of the fourth heat exchange member 21, the seventh electronic expansion valve 22 and the refrigerant passage of the third heat exchange member 5 connected in sequence. When the fourth circuit D is opened, the seventh electronic expansion valve 22 is opened. A ninth pressure and temperature sensor 58 close to the third heat exchange member 5 is arranged on the pipeline connecting the refrigerant passage of the third heat exchange member 5 and the second compressor 20. The superheat of the refrigerant can be calculated according to the temperature and pressure detected by the ninth pressure and temperature sensor 58, and the opening of the seventh electronic expansion valve 22 is controlled according to the superheat of the refrigerant. A seventh pressure and temperature sensor 56 is arranged on the pipeline connecting the second compressor 20 and the fourth heat exchange member 21.

[0081] The cooling liquid passage of the second heat exchange member 12 is used to communicate with the cooling liquid passage of the first device, and / or the cooling liquid flowing through the second heat exchange member 12 is used to exchange heat with the cooling liquid flowing through the second device. When the cooling liquid passage of the second heat exchange member 12 communicates with the cooling liquid passage of the first device, the heat transfer is direct transfer. When the cooling liquid flowing through the second heat exchange member 12 exchanges heat with the cooling liquid flowing through the second device, the heat transfer is indirect transfer.

[0082] The cooling liquid passage of the fourth heat exchange member 21 is used for communicating with the cooling liquid passage of the first device, and / or the cooling liquid flowing through the fourth heat exchange member 21 is used for heat exchange with the cooling liquid flowing through the second device. When the cooling liquid passage of the fourth heat exchange member 21 communicates with the cooling liquid passage of the first device, the heat transfer is direct transfer. When the cooling liquid flowing through the fourth heat exchange member 21 exchanges heat with the cooling liquid flowing through the second device, the heat transfer is indirect transfer.

[0083] With reference to Figures 8 to 10 , the first circuit A and the second circuit B are opened, and the electric drive assembly 4 is running, the second pump body 1 and the first compressor 11 are running, the cooling liquid flowing out of the electric drive assembly 4 to absorb the heat of the electric drive assembly 4 flows to the first heat exchange member 10; the high-temperature refrigerant flowing out of the first compressor 11 exchanges heat with the cooling liquid at the second heat exchange member 12, and the cooling liquid exchanges heat with the first device and / or the second device, and the refrigerant flowing out of the second heat exchange member 12 flows into the first heat exchange member 10, and the low-temperature refrigerant exchanges heat with the cooling liquid absorbing the heat of the electric drive assembly 4 at the first heat exchange member 10, that is, the refrigerant can absorb the heat of the cooling liquid in the first circuit A through the first heat exchange member 10.

[0084] With reference to Figures 11 to 13 , the third circuit C and the fourth circuit D are opened, and the electric drive assembly 4 is running, the second pump body 1 and the second compressor 20 are running, the cooling liquid flowing out of the electric drive assembly 4 to absorb the heat of the electric drive assembly 4 flows to the third heat exchange member 5; the high-temperature refrigerant flowing out of the second compressor 20 exchanges heat with the cooling liquid at the fourth heat exchange member 21, and the cooling liquid exchanges heat with the first device and / or the second device, and the refrigerant flowing out of the fourth heat exchange member 21 flows into the third heat exchange member 5, and the low-temperature refrigerant exchanges heat with the cooling liquid absorbing the heat of the electric drive assembly 4 at the third heat exchange member 5, that is, the refrigerant can absorb the heat of the cooling liquid in the third circuit C through the third heat exchange member 5.

[0085] In the embodiment of the present application, the waste heat of the electric drive assembly 4 is utilized through the second circuit B in the first refrigerant circuit or the fourth circuit D in the second refrigerant circuit, which can reduce the running power of the electric heater 35 or not use the electric heater 35 as much as possible, so as to reduce the power consumption, improve the cruising range of the vehicle, and reduce the cruising anxiety. In addition, through the redundant design of the second circuit B and the fourth circuit D, when one of the circuits is abnormal, the other circuit can realize the above functions, so as to ensure the reliability of the low-power heating.

[0086] In some embodiments, with reference to Figures 14 to 16 , the thermal management system further comprises a cooperative circuit O, and the cooperative circuit O comprises, in sequence along the flow direction of the cooling liquid, the first pump body 26, the first three-way valve 27, the cooling liquid passage of the first heat exchange member 10, the second three-way valve 28, and the cooling liquid passage of the fourth heat exchange member 21.

[0087] When the cooperative circuit O is opened, the first pump body 26 operates, and the cooling liquid flowing through the first heat exchange member 10 exchanges heat with the cooling liquid flowing through the fourth heat exchange member 21. A fifth temperature sensor 49 is arranged on the pipeline connecting the cooling liquid channel of the fourth heat exchange member 21 and the first pump body 26, and the fifth temperature sensor 49 is used to detect the temperature of the cooling liquid flowing out of the cooling liquid channel of the fourth heat exchange member 21. When the cooperative circuit O is opened, the first three-way valve 27 connects the cooling liquid channels of the first pump body 26 and the first heat exchange member 10, and the second three-way valve 28 connects the cooling liquid channels of the first heat exchange member 10 and the fourth heat exchange member 21.

[0088] Referring to Figures 14 to 16 , the second circuit B, the third circuit C, the fourth circuit D, and the cooperative circuit O are opened, and the electric drive assembly 4 operates, the first pump body 26, the second pump body 1, the first compressor 11, and the second compressor 20 operate, and the cooling liquid flowing out of the electric drive assembly 4 absorbs heat of the electric drive assembly 4 and flows to the third heat exchange member 5; the high-temperature refrigerant flowing out of the second compressor 20 transfers heat to the cooling liquid at the fourth heat exchange member 21, and the cooling liquid flows to the first heat exchange member 10; the refrigerant flowing out of the fourth heat exchange member 21 flows into the third heat exchange member 5, and the low-temperature refrigerant exchanges heat with the cooling liquid absorbing heat of the electric drive assembly 4 at the third heat exchange member 5, that is, the refrigerant in the fourth circuit D can absorb heat of the cooling liquid in the third circuit C through the third heat exchange member 5; the high-temperature refrigerant flowing out of the first compressor 11 transfers heat to the cooling liquid at the second heat exchange member 12, and the cooling liquid transfers heat to the first device and / or the second device; the refrigerant flowing out of the second heat exchange member 12 flows into the first heat exchange member 10, and the low-temperature refrigerant exchanges heat with the cooling liquid flowing out of the fourth heat exchange member 21 at the first heat exchange member 10, that is, the heat of the refrigerant in the fourth circuit D can be transferred to the refrigerant in the second circuit B through the fourth heat exchange member 21.

[0089] In this embodiment, the second circuit B cooperates with the fourth circuit D to realize the waste heat utilization of the electric drive assembly 4, that is, to realize the heating of the passenger compartment and / or the battery pack 37, and higher heating demand can be met. In addition, through the arrangement of the double compressors, compared with a single compressor with larger displacement, the effects of wide temperature range, low power consumption, and low noise can be achieved, so that the comfort can be improved.

[0090] In other examples, the three-way valve can also be replaced by a combination of two conventional electronic expansion valves.

[0091] In some embodiments, the first device is a heater core 31, and the cooling liquid circuit includes a second cooling liquid circuit, referring to Figure 5 , Figure 8 , Figure 10 , Figure 14 and Figure 16The second cooling liquid circuit comprises a fifth circuit E, and the fifth circuit E comprises the cooling liquid passages of the second heat exchange member 12 and the heater core 31 connected with each other. Figure 11 and Figure 13 The second cooling liquid circuit comprises a sixth circuit F, and the sixth circuit F comprises the cooling liquid passages of the fourth heat exchange member 21 and the heater core 31 connected with each other.

[0092] When the fifth circuit E is opened, the cooling liquid passages of the second heat exchange member 12 and the cooling liquid passages of the heater core 31 are communicated, and the second heat exchange member 12 can directly transfer heat to the heater core 31 through the cooling liquid flowing therethrough. When the sixth circuit F is opened, the cooling liquid passages of the fourth heat exchange member 21 and the cooling liquid passages of the heater core 31 are communicated, and the fourth heat exchange member 21 can directly transfer heat to the heater core 31 through the cooling liquid flowing therethrough. The thermal management system further comprises a blower 41 for driving air flow to form an air flow and making the air flow flow through the heater core 31 to deliver hot air to the passenger cabin.

[0093] When the first circuit A, the second circuit B, the fifth circuit E are opened and the electric drive assembly 4 is running, the second pump body 1 and the first compressor 11 are running, and the high-temperature refrigerant flowing out of the first compressor 11 transfers heat to the cooling liquid at the second heat exchange member 12, and the cooling liquid directly transfers heat to the heater core 31. When the third circuit C, the fourth circuit D and the sixth circuit F are opened and the electric drive assembly 4 is running, the second pump body 1 and the second compressor 20 are running, and the high-temperature refrigerant flowing out of the second compressor 20 transfers heat to the cooling liquid at the fourth heat exchange member 21, and the cooling liquid directly transfers heat to the heater core 31.

[0094] In this embodiment, the cooling liquid passages of the second heat exchange member 12 and the cooling liquid passages of the fourth heat exchange member 21 are used to communicate with the cooling liquid passages of the heater core 31 to ensure the heating efficiency of the passenger cabin.

[0095] In some embodiments, the fifth circuit E comprises the cooling liquid passages of the second heat exchange member 12, the heater core 31, the sixth three-way valve 32, the seventh three-way valve 33, the third pump body 29, the fifth three-way valve 30 and the eighth three-way valve 34 connected with each other. The sixth circuit F comprises the cooling liquid passages of the fourth heat exchange member 21, the heater core 31, the sixth three-way valve 32, the seventh three-way valve 33, the second three-way valve 28, the first three-way valve 27, the third pump body 29, the fifth three-way valve 30 and the eighth three-way valve 34 connected with each other.

[0096] An electric heater 35 is arranged between the eighth three-way valve 34 and the third pump body 29. In the case that the heating demand of the passenger cabin is low, the ambient temperature is extremely low (for example, below -40℃), the first refrigerant circuit and the second refrigerant circuit are faulty, etc., heating is performed through the electric heater 35.

[0097] Along the flow direction of the coolant, the fifth circuit E includes, in sequence, a third pump body 29, a fifth three-way valve 30, a heater core 31, a sixth three-way valve 32, a seventh three-way valve 33, the coolant passage of the second heat exchanger 12, an eighth three-way valve 34, and an electric heater 35. A third temperature sensor 47 is installed on the pipeline connecting the electric heater 35 and the third pump body 29. The third temperature sensor 47 is used to detect the temperature of the coolant before it flows into the third pump body 29.

[0098] Along the flow direction of the coolant, the sixth circuit F includes the third pump body 29, the fifth three-way valve 30, the heater core 31, the sixth three-way valve 32, the seventh three-way valve 33, the second three-way valve 28, the coolant passage of the fourth heat exchanger 21, the first pump body 26, the first three-way valve 27, the eighth three-way valve 34, and the electric heater 35, which are connected in sequence.

[0099] When the fifth circuit E is opened, the third pump body 29 operates, the fifth three-way valve 30 connects the third pump body 29 with the heater core 31, the sixth three-way valve 32 connects the heater core 31 with the seventh three-way valve 33, the seventh three-way valve 33 connects the sixth three-way valve 32 and the coolant passage of the second heat exchanger 12, and the eighth three-way valve 34 connects the coolant passage of the second heat exchanger 12 and the electric heater 35.

[0100] When the sixth circuit F is open, the third pump body 29 operates. The fifth three-way valve 30 connects the third pump body 29 to the heater core 31, the sixth three-way valve 32 connects the heater core 31 to the seventh three-way valve 33, the seventh three-way valve 33 connects the sixth three-way valve 32 and the second three-way valve 28, the eighth three-way valve 34 connects the first three-way valve 27 and the electric heater 35, the first three-way valve 27 connects the first pump body 26 and the eighth three-way valve 34, and the second three-way valve 28 connects the coolant passage of the fourth heat exchanger 21 and the seventh three-way valve 33. By controlling the switching states of the seventh three-way valve 33 and the eighth three-way valve 34, it is possible to control whether the fifth circuit E or the sixth circuit F is open.

[0101] In some embodiments, refer to Figure 6 The second component is the battery pack 37. The coolant circuit includes a third coolant circuit, which in turn includes a seventh circuit G. The seventh circuit G includes a connected fourth pump body 36, a coolant passage for the battery pack 37, and a battery coolant passage for the fifth heat exchanger 40. A fourth temperature sensor 48 is installed on the pipeline connecting the fourth pump body 36 and the battery pack 37. The fourth temperature sensor 48 is used to detect the temperature of the coolant flowing into the battery pack 37. The fifth heat exchanger 40 is a liquid-liquid heat exchanger, which has a battery coolant passage and a heat exchange coolant passage.

[0102] Reference Figure 7 , Figure 9 , Figure 10 , Figure 15 andFigure 16 The third cooling liquid circuit comprises an eighth circuit H, and the eighth circuit H comprises the heat exchange cooling liquid channel of the fifth heat exchange member 40 and the cooling liquid channel of the second heat exchange member 12 connected with each other. When the eighth circuit H is opened, the heat exchange cooling liquid channel of the fifth heat exchange member 40 and the cooling liquid channel of the second heat exchange member 12 are communicated.

[0103] With reference to Figure 12 and Figure 13 The third cooling liquid circuit comprises a ninth circuit J, and the ninth circuit J comprises the heat exchange cooling liquid channel of the fifth heat exchange member 40 and the cooling liquid channel of the fourth heat exchange member 21 connected with each other. When the ninth circuit J is opened, the heat exchange cooling liquid channel of the fifth heat exchange member 40 and the cooling liquid channel of the fourth heat exchange member 21 are communicated.

[0104] In the embodiment, the cooling liquid flowing through the second heat exchange member 12 and the cooling liquid flowing through the fourth heat exchange member 21 are both used to exchange heat with the cooling liquid flowing through the battery pack 37, that is, the cooling liquid flowing through the seventh circuit G, so that the battery pack 37 is heated by the cooling liquid flowing through the seventh circuit G to accurately control the working temperature of the battery pack 37.

[0105] In some embodiments, the eighth circuit H comprises the third pump body 29, the fifth three-way valve 30, the heat exchange cooling liquid channel of the fifth heat exchange member 40, the sixth three-way valve 32, the seventh three-way valve 33, the cooling liquid channel of the second heat exchange member 12 and the eighth three-way valve 34 connected with each other; and the ninth circuit J comprises the third pump body 29, the fifth three-way valve 30, the heat exchange cooling liquid channel of the fifth heat exchange member 40, the sixth three-way valve 32, the seventh three-way valve 33, the second three-way valve 28, the cooling liquid channel of the fourth heat exchange member 21, the first three-way valve 27 and the eighth three-way valve 34 connected with each other.

[0106] In the flow direction of the cooling liquid, the eighth circuit H comprises the third pump body 29, the fifth three-way valve 30, the heat exchange cooling liquid channel of the fifth heat exchange member 40, the sixth three-way valve 32, the seventh three-way valve 33, the cooling liquid channel of the second heat exchange member 12, the eighth three-way valve 34 and the electric heater 35 connected with each other in sequence.

[0107] In the flow direction of the cooling liquid, the ninth circuit J comprises the third pump body 29, the fifth three-way valve 30, the heat exchange cooling liquid channel of the fifth heat exchange member 40, the sixth three-way valve 32, the seventh three-way valve 33, the second three-way valve 28, the cooling liquid channel of the fourth heat exchange member 21, the first three-way valve 27, the eighth three-way valve 34 and the electric heater 35 connected with each other in sequence.

[0108] When the eighth circuit H is turned on, the fourth pump body 36 operates, the fifth three-way valve 30 connects the third pump body 29 and the fifth heat exchange member 40, the sixth three-way valve 32 connects the fifth heat exchange member 40 and the seventh three-way valve 33, the seventh three-way valve 33 connects the sixth three-way valve 32 and the cooling liquid passage of the second heat exchange member 12, and the eighth three-way valve 34 connects the cooling liquid passage of the second heat exchange member 12 and the electric heater 35.

[0109] When the ninth circuit J is turned on, the fourth pump body 36 operates, the fifth three-way valve 30 connects the third pump body 29 and the fifth heat exchange member 40, the sixth three-way valve 32 connects the fifth heat exchange member 40 and the seventh three-way valve 33, the seventh three-way valve 33 connects the sixth three-way valve 32 and the second three-way valve 28, the eighth three-way valve 34 connects the first three-way valve 27 and the electric heater 35, the first three-way valve 27 connects the first pump body 26 and the eighth three-way valve 34, and the second three-way valve 28 connects the cooling liquid passage of the fourth heat exchange member 21 and the seventh three-way valve 33.

[0110] When the fifth circuit E or the sixth circuit F is turned on alone, the fifth three-way valve 30 connects the third pump body 29 and the warm air core 31, and the sixth three-way valve 32 connects the warm air core 31 and the seventh three-way valve 33. When the eighth circuit H or the ninth circuit J is turned on alone, the fifth three-way valve 30 connects the third pump body 29 and the fifth heat exchange member 40, and the sixth three-way valve 32 connects the fifth heat exchange member 40 and the seventh three-way valve 33.

[0111] When the fifth circuit E and the eighth circuit H are turned on simultaneously, the fifth three-way valve 30 connects the third pump body 29 and the warm air core 31, and connects the third pump body 29 and the fifth heat exchange member 40, and the sixth three-way valve 32 connects the warm air core 31 and the seventh three-way valve 33, and connects the fifth heat exchange member 40 and the seventh three-way valve 33. When the sixth circuit F and the ninth circuit J are turned on simultaneously, the fifth three-way valve 30 connects the third pump body 29 and the warm air core 31, and connects the third pump body 29 and the fifth heat exchange member 40, and the sixth three-way valve 32 connects the warm air core 31 and the seventh three-way valve 33, and connects the fifth heat exchange member 40 and the seventh three-way valve 33. In the embodiment, the heating of the passenger compartment, the heating of the battery pack, or the simultaneous heating of the passenger compartment and the battery pack can be controlled by controlling the fifth three-way valve 30 and the sixth three-way valve 32, and the structure is simple.

[0112] In some embodiments, referring to Figures 8 to 10 , the first circuit A includes the second pump body 1, the third three-way valve 2, the cooling liquid passage of the first heat exchange member 10, the fourth three-way valve 3, the electric drive assembly 4, and the cooling liquid passage of the third heat exchange member 5 connected in sequence. Figures 11 to 16 , the third circuit C includes the second pump body 1, the third three-way valve 2, the fourth three-way valve 3, the electric drive assembly 4, and the cooling liquid passage of the third heat exchange member 5 connected in sequence.

[0113] The first circuit A includes, in sequence along the flow direction of the cooling liquid, the second pump body 1, the third three-way valve 2, the first pump body 26, the first three-way valve 27, the cooling liquid passage of the first heat exchange member 10, the second three-way valve 28, the fourth three-way valve 3, the electric drive assembly 4, and the cooling liquid passage of the third heat exchange member 5. The third three-way valve 2 and the first pump body 26 can be directly connected by an external pipeline. The third three-way valve 2 and the first pump body 26 can also be connected by a first section of pipeline, a bypass passage in the fourth heat exchange member 21, a second section of pipeline, and the first pump body 26. In this case, the cooling liquid does not flow through the cooling liquid passage in the fourth heat exchange member 21. When the first circuit A is opened, the second pump body 1 operates, and the first pump body 26 can operate or not operate.

[0114] The pipeline connecting the fourth three-way valve 3 and the electric drive assembly 4 is provided with a first temperature sensor 45 for detecting the temperature of the cooling liquid before entering the electric drive assembly 4. The pipeline connecting the electric drive assembly 4 and the cooling liquid passage of the third heat exchange member 5 is provided with a second temperature sensor 46 for detecting the temperature of the cooling liquid flowing out of the electric drive assembly 4.

[0115] In this embodiment, by controlling the switching states of the third three-way valve 2 and the fourth three-way valve 3, it can be controlled whether the first circuit A or the third circuit C is opened, and the structure is simple.

[0116] In some embodiments, the first circuit A has a first state and a second state. In the first state, the first circuit A includes the second pump body 1, the cooling liquid passage of the first heat exchange member 10, the electric drive assembly 4, the cooling liquid passage of the third heat exchange member 5, the ninth three-way valve 6, the bypass pipeline 9, and the thirteenth three-way valve 8, which are connected in sequence. In the second state, the first circuit A includes the second pump body 1, the cooling liquid passage of the first heat exchange member 10, the electric drive assembly 4, the cooling liquid passage of the third heat exchange member 5, the ninth three-way valve 6, the sixth heat exchange member 7, and the thirteenth three-way valve 8, which are connected in sequence.

[0117] The sixth heat exchange member 7 is a liquid-air heat exchanger having a cooling liquid passage, and specifically can be a low-temperature radiator. Referring to Figure 4 The thermal management system further includes a second fan 43 for driving air flow to form an air flow and flowing the air flow through the sixth heat exchange member 7.

[0118] In the first state, the first circuit A includes, in sequence along the flow direction of the cooling liquid, the second pump body 1, the third three-way valve 2, the first pump body 26, the first three-way valve 27, the cooling liquid passage of the first heat exchange member 10, the second three-way valve 28, the fourth three-way valve 3, the electric drive assembly 4, the cooling liquid passage of the third heat exchange member 5, the ninth three-way valve 6, the bypass pipeline 9, and the thirteenth three-way valve 8.

[0119] In the second state, along the flow direction of the cooling liquid, the first circuit A comprises, in sequence, the second pump body 1, the third three-way valve 2, the first pump body 26, the first three-way valve 27, the cooling liquid channel of the first heat exchange member 10, the second three-way valve 28, the fourth three-way valve 3, the electric drive assembly 4, the cooling liquid channel of the third heat exchange member 5, the ninth three-way valve 6, the sixth heat exchange member 7, and the thirteenth three-way valve 8.

[0120] In the embodiment, when the electric drive assembly 4 is not running, the first circuit A can be in the second state, at which time the cooling liquid flowing out of the first heat exchange member 10 absorbs heat in the environment through the sixth heat exchange member 7. When the electric drive assembly 4 is running, the first circuit A can be in the first state, at which time the cooling liquid flowing out of the first heat exchange member 10 absorbs heat at the electric drive assembly 4, achieving waste heat utilization of the electric drive assembly 4.

[0121] In some embodiments, the third circuit C has a third state and a fourth state. In the third state, the third circuit C comprises, in sequence, the second pump body 1, the electric drive assembly 4, the cooling liquid channel of the third heat exchange member 5, the ninth three-way valve 6, the bypass pipeline 9, and the thirteenth three-way valve 8. Referring to Figure 4 In the fourth state, the third circuit C comprises, in sequence, the second pump body 1, the electric drive assembly 4, the cooling liquid channel of the third heat exchange member 5, the ninth three-way valve 6, the sixth heat exchange member 7, and the thirteenth three-way valve 8.

[0122] In the third state, along the flow direction of the cooling liquid, the third circuit C comprises, in sequence, the second pump body 1, the third three-way valve 2, the fourth three-way valve 3, the electric drive assembly 4, the cooling liquid channel of the third heat exchange member 5, the ninth three-way valve 6, the bypass pipeline 9, and the thirteenth three-way valve 8. In the fourth state, along the flow direction of the cooling liquid, the third circuit C comprises, in sequence, the second pump body 1, the third three-way valve 2, the fourth three-way valve 3, the electric drive assembly 4, the cooling liquid channel of the third heat exchange member 5, the ninth three-way valve 6, the sixth heat exchange member 7, and the thirteenth three-way valve 8.

[0123] In the embodiment, when the electric drive assembly 4 is not running, the third circuit C can be in the fourth state, at which time the cooling liquid flowing out of the third heat exchange member 5 absorbs heat in the environment through the sixth heat exchange member 7. When the electric drive assembly 4 is running, the third circuit C can be in the third state, at which time the cooling liquid flowing out of the second pump body 1 absorbs heat at the electric drive assembly 4, achieving waste heat utilization of the electric drive assembly 4.

[0124] When neither the second circuit B nor the fourth circuit D is open, the third circuit C needs to be in the third state, at which time the cooling liquid flowing out of the electric drive assembly 4 can be cooled through the sixth heat exchange member 7.

[0125] Referring to Figure 8, the thermal management system has a first operation mode, in the first operation mode, the first circuit A, the second circuit B, the fifth circuit E are opened, the first compressor 11, the second pump body 1, the third pump body 29, the electric drive assembly 4 are operated, and the first circuit A is in the first state. In the first operation mode, the heating of the passenger compartment can be realized.

[0126] With reference to Figure 9 , the thermal management system has a second operation mode, in the second operation mode, the first circuit A, the second circuit B, the seventh circuit G, the eighth circuit H are opened, the first compressor 11, the second pump body 1, the third pump body 29, the fourth pump body 36, the electric drive assembly 4 are operated, and the first circuit A is in the first state. In the second operation mode, the heating of the battery pack can be realized.

[0127] With reference to Figure 10 , the thermal management system has a third operation mode, in the third operation mode, the first circuit A, the second circuit B, the fifth circuit E, the seventh circuit G, the eighth circuit H are opened, the first compressor 11, the second pump body 1, the third pump body 29, the fourth pump body 36, the electric drive assembly 4 are operated, and the first circuit A is in the first state. In the third operation mode, the heating of the passenger compartment and the battery pack can be realized.

[0128] With reference to Figure 11 , the thermal management system has a fourth operation mode, in the fourth operation mode, the third circuit C, the fourth circuit D, the sixth circuit F are opened, the second compressor 20, the second pump body 1, the third pump body 29, the electric drive assembly 4 are operated, and the third circuit A is in the third state. In the fourth operation mode, the heating of the passenger compartment can be realized.

[0129] With reference to Figure 12 , the thermal management system has a fifth operation mode, in the fifth operation mode, the third circuit C, the fourth circuit D, the seventh circuit G, the ninth circuit J are opened, the second compressor 20, the second pump body 1, the third pump body 29, the fourth pump body 36, the electric drive assembly 4 are operated, and the third circuit A is in the third state. In the fifth operation mode, the heating of the battery pack can be realized.

[0130] With reference to Figure 13 , the thermal management system has a sixth operation mode, in the sixth operation mode, the third circuit C, the fourth circuit D, the sixth circuit F, the seventh circuit G, the ninth circuit J are opened, the second compressor 20, the second pump body 1, the third pump body 29, the fourth pump body 36, the electric drive assembly 4 are operated, and the third circuit A is in the third state. In the sixth operation mode, the heating of the passenger compartment and the battery pack can be realized.

[0131] With reference to Figure 14, the thermal management system has a seventh operation mode, in the seventh operation mode, the second circuit B, the third circuit C, the fourth circuit D, the cooperative circuit O, the fifth circuit E are opened, the first compressor 11, the second compressor 20, the first pump body 26, the second pump body 1, the third pump body 29, the electric drive assembly 4 are operated, and the third circuit A is in the third state. In the seventh operation mode, the heating of the passenger compartment can be realized.

[0132] With reference to Figure 15 , the thermal management system has an eighth operation mode, in the eighth operation mode, the second circuit B, the third circuit C, the fourth circuit D, the cooperative circuit O, the seventh circuit G, the eighth circuit H are opened, the first compressor 11, the second compressor 20, the first pump body 26, the second pump body 1, the third pump body 29, the fourth pump body 36, the electric drive assembly 4 are operated, and the third circuit A is in the third state. In the eighth operation mode, the heating of the battery pack can be realized.

[0133] With reference to Figure 16 , the thermal management system has a ninth operation mode, in the ninth operation mode, the second circuit B, the third circuit C, the fourth circuit D, the cooperative circuit O, the fifth circuit E, the seventh circuit G, the eighth circuit H are opened, the first compressor 11, the second compressor 20, the first pump body 26, the second pump body 1, the third pump body 29, the fourth pump body 36, the electric drive assembly 4 are operated, and the third circuit A is in the third state.

[0134] In the ninth operation mode, the heating of the passenger compartment and the battery pack can be realized.

[0135] With reference to Figure 17 , the thermal management system has a tenth operation mode, in the tenth operation mode, the fifth circuit E is opened, and the third pump body 29 and the electric heater 35 are operated. In the tenth operation mode, the electric heating of the passenger compartment can be realized.

[0136] With reference to Figure 18 , the thermal management system has an eleventh operation mode, in the eleventh operation mode, the seventh circuit G and the eighth circuit H are opened, and the third pump body 29, the fourth pump body 36 and the electric heater 35 are operated. In the eleventh operation mode, the heating of the battery pack can be realized.

[0137] With reference to Figure 19 , the thermal management system has a twelfth operation mode, in the twelfth operation mode, the fifth circuit E, the seventh circuit G and the eighth circuit H are opened, and the third pump body 29, the fourth pump body 36 and the electric heater 35 are operated. In the twelfth operation mode, the heating of the passenger compartment and the battery pack can be realized.

[0138] When the heating demand of the passenger compartment is low, the ambient temperature is extremely low (for example, below -40°C), the first refrigerant circuit and the second refrigerant circuit fail, and the like, heating is performed by the electric heater 35, and at this time, the thermal management system is in any one of the tenth operating mode, the eleventh operating mode, and the twelfth operating mode.

[0139] When the thermal management system is in any one of the first operating mode to the ninth operating mode, the electric heater 35 can be operated or can not be operated.

[0140] In some embodiments, referring to Figures 20 to 22 , the first coolant circuit includes a tenth circuit K, and along the flow direction of the refrigerant, the tenth circuit K includes, in sequence, the first compressor 11, the refrigerant passage of the second heat exchange member 12, the first electronic expansion valve 15, the first external condenser 16, and the stop valve 14. The third pressure and temperature sensor 52 is arranged on the pipeline connecting the first external condenser 16 and the stop valve 14. When the tenth circuit K is opened, the first electronic expansion valve 15 and the stop valve 14 are opened. The superheat degree of the refrigerant can be calculated according to the temperature and pressure detected by the third pressure and temperature sensor 52, and the opening degree of the first electronic expansion valve 15 is controlled according to the superheat degree of the refrigerant.

[0141] The first external condenser 16 is a refrigerant-air heat exchanger, and the first external condenser 16 has a refrigerant passage. The thermal management system further includes a third fan for driving air flow to form an air flow and flow through the first external condenser 16. The air flow specifically enters from the air inlet grille 44.

[0142] When the tenth circuit K is opened, the first compressor 11 is operated, and the high-temperature refrigerant flowing out of the first compressor 11 transfers heat to the coolant at the second heat exchange member 12, and the coolant transfers heat to the heater core 31 and / or the battery pack 37. The refrigerant flowing out of the second heat exchange member 12 flows into the first external condenser 16 through the first electronic expansion valve 15, and in the first external condenser 16, the low-temperature and low-pressure gaseous refrigerant exchanges heat with the air flow flowing through the first external condenser 16. At this time, the refrigerant can absorb heat from the environment through the first external condenser 16, that is, the refrigerant absorbs heat and evaporates.

[0143] Referring to Figure 20 , the thermal management system has a thirteenth operating mode, and in the thirteenth operating mode, the fifth circuit E and the tenth circuit K are opened, and the first compressor 11 and the third pump body 29 are operated. In the thirteenth operating mode, the heating of the passenger compartment can be achieved.

[0144] Referring to Figure 21The heat management system has a fourteenth operation mode. In the fourteenth operation mode, the seventh circuit G, the eighth circuit H and the tenth circuit K are opened, and the first compressor 11, the third pump body 29 and the fourth pump body 36 are operated. In the fourteenth operation mode, the heating of the battery pack can be realized.

[0145] With reference to Figure 22 The heat management system has a fifteenth operation mode. In the fifteenth operation mode, the seventh circuit G, the eighth circuit H and the tenth circuit K are opened, and the first compressor 11, the third pump body 29 and the fourth pump body 36 are operated. In the fifteenth operation mode, the heating of the passenger compartment and the battery pack can be realized.

[0146] In some embodiments, the type of refrigerant circulating in the second refrigerant circuit is different from the type of refrigerant circulating in the first refrigerant circuit. The specific volume of the refrigerant circulating in the second refrigerant circuit is less than the specific volume of the refrigerant circulating in the first refrigerant circuit.

[0147] The refrigerant circulating in the second refrigerant circuit can be R290 refrigerant, R744 refrigerant, etc., and the refrigerant circulating in the first refrigerant circuit can be R134a refrigerant, R1234yf refrigerant, etc. The refrigerant circulating in the second refrigerant circuit has better performance under low temperature working conditions, and can realize heat pump heating at a lower temperature. For example, when the performance of the first refrigerant circuit is poor at a lower temperature, heat pump heating is realized through the second refrigerant circuit.

[0148] In some embodiments, the second device is the battery pack 37, and the third coolant circuit includes the seventh circuit G. In the flow direction of the coolant, the seventh circuit G includes, in sequence, the fourth pump body 36, the coolant passage of the battery pack 37, the coolant passage of the seventh heat exchange member 38, the coolant passage of the eighth heat exchange member 39, and the battery coolant passage of the fifth heat exchange member 40. The seventh heat exchange member 38 and the eighth heat exchange member 39 are both liquid-refrigerant heat exchangers, and each has a coolant passage and a refrigerant passage.

[0149] The seventh heat exchange member 38, the eighth heat exchange member 39 and the fifth heat exchange member 40 are connected in series, and the battery coolant passage of the fifth heat exchange member 40 can be directly connected to the fourth pump body 36 through an external pipeline. The battery coolant passage of the fifth heat exchange member 40 can also be connected to the fourth pump body 36 through a third section of pipeline, a bypass passage in the eighth heat exchange member 39, a fourth section of pipeline, a bypass passage in the seventh heat exchange member 38, and a fifth section of pipeline. At this time, the coolant flowing out of the fifth heat exchange member 40 does not pass through the coolant passages of the seventh heat exchange member 38 and the eighth heat exchange member 39.

[0150] With reference to Figure 23 , Figure 25 , Figure 27 and Figure 29The first refrigerant circuit comprises an eleventh circuit L, which comprises, in the flow direction of the refrigerant, in sequence, the first compressor 11, the refrigerant passage of the second heat exchange element 12, the first electronic expansion valve 15, the first external condenser 16, the second electronic expansion valve 17 and the refrigerant passage of the eighth heat exchange element 39.

[0151] When the eleventh circuit L is turned on, the first electronic expansion valve 15 and the second electronic expansion valve 17 are opened. The opening degree of the first electronic expansion valve 15 is 100%. A fifth pressure-temperature sensor 54 is arranged on the pipeline connecting the eighth heat exchange element 39 and the first compressor 11, and the superheat degree of the refrigerant can be calculated according to the temperature and pressure detected by the fifth pressure-temperature sensor 54, and the opening degree of the second electronic expansion valve 17 is controlled according to the superheat degree of the refrigerant.

[0152] When the seventh circuit G and the eleventh circuit L are turned on, the first compressor 11 operates, and the high-temperature refrigerant flowing out of the first compressor 11 flows to the first external condenser 16. In the first external condenser 16, the high-temperature refrigerant exchanges heat with the airflow flowing through the first external condenser 16, and the refrigerant is condensed, and then flows into the eighth heat exchange element 39 through the second electronic expansion valve 17. In the eighth heat exchange element 39, the low-temperature and low-pressure gaseous refrigerant exchanges heat with the cooling liquid flowing through the eighth heat exchange element 39. At this time, the refrigerant absorbs heat and evaporates, thereby achieving cooling of the cooling liquid flowing through the eighth heat exchange element 39.

[0153] Referring to Figure 24 , Figure 25 , Figure 28 and Figure 29 , the second refrigerant circuit comprises a twelfth circuit M, which comprises, in the flow direction of the refrigerant, in sequence, the second compressor 20, the refrigerant passage of the fourth heat exchange element 21, the third electronic expansion valve 23, the second external condenser 24, the fourth electronic expansion valve 25 and the refrigerant passage of the seventh heat exchange element 38.

[0154] The second external condenser 24 is a refrigerant-air heat exchanger, and the second external condenser 24 has a refrigerant passage. The thermal management system further comprises a first fan 42 for driving the flow of air to form an airflow and making the airflow flow through the second external condenser 24. The airflow specifically enters from an air inlet grille 44.

[0155] The pipeline connecting the second external condenser 24 and the fourth electronic expansion valve 25 is provided with an eighth pressure-temperature sensor 57 close to the second external condenser 24, and the pipeline connecting the seventh heat exchange element 38 and the second compressor 20 is provided with a tenth pressure-temperature sensor 59 close to the seventh heat exchange element 38 and an eleventh pressure-temperature sensor 60 close to the second compressor 20.

[0156] When the twelfth circuit M is turned on, the third electronic expansion valve 23 and the fourth electronic expansion valve 25 are opened. The opening degree of the third electronic expansion valve 23 is 100%. The superheat degree of the refrigerant can be calculated according to the temperature and pressure detected by the tenth pressure temperature sensor 59, and the opening degree of the fourth electronic expansion valve 25 is controlled according to the superheat degree of the refrigerant.

[0157] When the seventh circuit G and the twelfth circuit M are turned on, the second compressor 20 operates, and the high-temperature refrigerant flowing out of the second compressor 20 flows to the second external condenser 24. In the second external condenser 24, the high-temperature refrigerant exchanges heat with the airflow flowing through the second external condenser 24, and the refrigerant is condensed, and then flows into the seventh heat exchange member 38 through the fourth electronic expansion valve 25. In the seventh heat exchange member 38, the low-temperature and low-pressure gaseous refrigerant exchanges heat with the cooling liquid flowing through the seventh heat exchange member 38. At this time, the refrigerant absorbs heat and evaporates, thereby achieving cooling of the cooling liquid flowing through the seventh heat exchange member 38.

[0158] Referring to Figure 23 , the thermal management system has a sixteenth operating mode. In the sixteenth operating mode, the seventh circuit G and the eleventh circuit L are turned on, and the first compressor 11 and the fourth pump body 36 operate. In the sixteenth operating mode, refrigeration of the battery pack can be achieved.

[0159] Referring to Figure 24 , the thermal management system has a seventeenth operating mode. In the seventeenth operating mode, the seventh circuit G and the twelfth circuit M are turned on, and the second compressor 20 and the fourth pump body 36 operate. In the seventeenth operating mode, refrigeration of the battery pack can be achieved.

[0160] Referring to Figure 25 , the thermal management system has an eighteenth operating mode. In the eighteenth operating mode, the seventh circuit G, the eleventh circuit L, and the twelfth circuit M are turned on, and the first compressor 11, the second compressor 20, and the fourth pump body 36 operate. In the eighteenth operating mode, refrigeration of the battery pack can be achieved.

[0161] In the case of low load of the battery pack cooling, failure of the first refrigerant circuit, and the like, the thermal management system can be caused to operate in the seventeenth operating mode. When the load of the battery pack cooling is high, the thermal management system can be caused to operate in the eighteenth operating mode. At this time, the cooling liquid is cooled in two stages by the seventh heat exchange member 38 and the eighth heat exchange member 39 connected in series, and higher cooling demand can be met.

[0162] In some embodiments, referring to Figure 26 , Figure 27 , Figure 28 and Figure 29The first refrigerant circuit includes a thirteenth circuit N. In the flow direction of the refrigerant, the thirteenth circuit N includes, in sequence, the first compressor 11, the refrigerant passage of the second heat exchange element 12, the first electronic expansion valve 15, the first external condenser 16, the fifth electronic expansion valve 18, and the evaporator 19.

[0163] The fourth pressure-temperature sensor 53 is arranged on the pipeline connecting the evaporator 19 and the first compressor 11. When the thirteenth circuit N is turned on, the first electronic expansion valve 15 and the fifth electronic expansion valve 18 are opened. The opening degree of the first electronic expansion valve 15 is 100%. The superheat degree of the refrigerant can be calculated according to the temperature and pressure detected by the fourth pressure-temperature sensor 53, and the opening degree of the fifth electronic expansion valve 18 is controlled according to the superheat degree of the refrigerant.

[0164] When the thirteenth circuit N is turned on, the first compressor 11 operates. The high-temperature refrigerant flowing out of the first compressor 11 flows to the first external condenser 16. In the first external condenser 16, the high-temperature refrigerant exchanges heat with the airflow flowing through the first external condenser 16, and the refrigerant is condensed. Then, the refrigerant flows into the evaporator 19 through the fifth electronic expansion valve 18. In the evaporator 19, the low-temperature and low-pressure gaseous refrigerant exchanges heat with the airflow flowing through the evaporator 19. At this time, the refrigerant absorbs heat and evaporates, thereby achieving cooling of the airflow. The air blower 41 is used to drive the airflow to form the airflow, and the airflow flows through the evaporator 19 to deliver cool air to the passenger compartment.

[0165] With reference to Figure 26 The thermal management system has a nineteenth operating mode. In the nineteenth operating mode, the thirteenth circuit N is turned on, and the first compressor 11 operates. In the nineteenth operating mode, the cooling of the passenger compartment can be achieved.

[0166] With reference to Figure 27 The thermal management system has a twentieth operating mode. In the twentieth operating mode, the seventh circuit G, the thirteenth circuit N, and the eleventh circuit L are turned on, and the first compressor 11 and the fourth pump body 36 operate. In the twentieth operating mode, the cooling of the passenger compartment and the battery pack can be achieved.

[0167] With reference to Figure 28 The thermal management system has a twenty-first operating mode. In the twenty-first operating mode, the seventh circuit G, the thirteenth circuit N, and the twelfth circuit M are turned on, and the first compressor 11, the second compressor 20, and the fourth pump body 36 operate. In the twenty-first operating mode, the cooling of the passenger compartment and the battery pack can be achieved.

[0168] With reference to Figure 29The heat management system has a twenty-second operation mode. In the twenty-second operation mode, the seventh circuit G, the thirteenth circuit N, the twelfth circuit M and the eleventh circuit L are opened, and the first compressor 11, the second compressor 20 and the fourth pump body 36 are operated. In the twenty-second operation mode, the passenger compartment and the battery pack can be cooled.

[0169] In a second aspect, an embodiment of the present application provides a vehicle, which comprises the heat management system.

[0170] The vehicle can be a sedan, a business car, an off-road vehicle, a sport utility vehicle, etc. The vehicle can be a new energy vehicle, for example, a pure electric vehicle, a hybrid electric vehicle, etc.

[0171] In the present application, unless otherwise explicitly limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0172] In the present application, the terms "first", "second", "third", "fourth" and the like (if any) are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0173] The above embodiments are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Any equivalent replacement or transformation of the present application based on the present application is within the protection scope of the present application.

Claims

1. A thermal management system, characterized by, The heat management system comprises a refrigerant circuit and a coolant circuit, the refrigerant circuit comprises a first refrigerant circuit and a second refrigerant circuit, and the coolant circuit comprises a first coolant circuit; The first coolant circuit comprises a first circuit (A) comprising a coolant passage of the electric drive assembly (4) and the first heat exchange member (10), and the first refrigerant circuit comprises a second circuit (B) comprising a refrigerant passage of the first compressor (11), the second heat exchange member (12) and the first heat exchange member (10); The first coolant circuit comprises a third circuit (C) comprising a coolant passage of the electric drive assembly (4) and the third heat exchange member (5), and the second refrigerant circuit comprises a fourth circuit (D) comprising a refrigerant passage of the second compressor (20), the fourth heat exchange member (21) and the third heat exchange member (5); The second heat exchange member (12) and the fourth heat exchange member (21) both have a coolant passage and are used for transferring heat from the first device and / or the second device to the coolant.

2. The thermal management system of claim 1, wherein, The heat management system further comprises a cooperative circuit (O) comprising a first pump body (26), a first three-way valve (27), a coolant passage of the first heat exchange member (10), a second three-way valve (28) and a coolant passage of the fourth heat exchange member (21).

3. The thermal management system of claim 1 or 2, wherein, The first device is a heater core (31), the coolant circuit comprises a second coolant circuit, and the second coolant circuit comprises a seventh circuit (E) comprising a coolant passage of the heater core (31) and the second heat exchange member (12); The second coolant circuit comprises a sixth circuit (F) comprising a coolant passage of the heater core (31) and the fourth heat exchange member (21).

4. The thermal management system of claim 3, wherein, The seventh circuit (E) comprises a third pump body (29), a fifth three-way valve (30), the heater core (31), a sixth three-way valve (32), a seventh three-way valve (33), a coolant passage of the second heat exchange member (12) and an eighth three-way valve (34); The sixth circuit (F) comprises the third pump body (29), the fifth three-way valve (30), the heater core (31), the sixth three-way valve (32), the seventh three-way valve (33), the second three-way valve (28), a coolant passage of the fourth heat exchange member (21), the first three-way valve (27) and the eighth three-way valve (34).

5. The thermal management system of claim 1 or 2, wherein, The second device is a battery pack (37), the coolant circuit comprises a third coolant circuit, and the third coolant circuit comprises a seventh circuit (G) comprising a coolant passage of the battery pack (37) and a battery coolant passage of the fifth heat exchange member (40). The third cooling liquid circuit comprises an eighth circuit (H) comprising the heat exchange cooling liquid channel of the fifth heat exchange member (40) and the cooling liquid channel of the second heat exchange member (12) connected in sequence; The third cooling liquid circuit comprises a ninth circuit (J) comprising the heat exchange cooling liquid channel of the fifth heat exchange member (40) and the cooling liquid channel of the fourth heat exchange member (21) connected in sequence.

6. The thermal management system of claim 5, wherein, The eighth circuit (H) comprises a third pump body (29), a fifth three-way valve (30), the heat exchange cooling liquid channel of the fifth heat exchange member (40), a sixth three-way valve (32), a seventh three-way valve (33), the cooling liquid channel of the second heat exchange member (12) and an eighth three-way valve (34) connected in sequence; The ninth circuit (J) comprises the third pump body (29), the fifth three-way valve (30), the heat exchange cooling liquid channel of the fifth heat exchange member (40), the sixth three-way valve (32), the seventh three-way valve (33), a second three-way valve (28), the cooling liquid channel of the fourth heat exchange member (21), a first three-way valve (27) and the eighth three-way valve (34) connected in sequence.

7. The thermal management system of claim 6, wherein, An electric heater (35) is arranged between the eighth three-way valve (34) and the third pump body (29).

8. The thermal management system of claim 1 or 2, wherein, The first circuit (A) comprises a second pump body (1), a third three-way valve (2), the cooling liquid channel of the first heat exchange member (10), a fourth three-way valve (3), the electric drive assembly (4) and the cooling liquid channel of the third heat exchange member (5) connected in sequence. The third circuit (C) comprises the second pump body (1), the third three-way valve (2), the fourth three-way valve (3), the electric drive assembly (4) and the cooling liquid channel of the third heat exchange member (5) connected in sequence.

9. The thermal management system of claim 1 or 2, wherein, The first circuit (A) has a first state and a second state, in the first state, the first circuit (A) comprises the second pump body (1), the cooling liquid channel of the first heat exchange member (10), the electric drive assembly (4), the cooling liquid channel of the third heat exchange member (5), a ninth three-way valve (6), a bypass pipeline (9) and a thirteenth three-way valve (8) connected in sequence; In the second state, the first circuit (A) comprises the second pump body (1), the cooling liquid channel of the first heat exchange member (10), the electric drive assembly (4), the cooling liquid channel of the third heat exchange member (5), the ninth three-way valve (6), a sixth heat exchange member (7) and the thirteenth three-way valve (8) connected in sequence.

10. The thermal management system of claim 1 or 2, wherein, The third circuit (C) has a third state and a fourth state, in the third state, the third circuit (C) comprises the second pump body (1), the electric drive assembly (4), the cooling liquid channel of the third heat exchange member (5), the ninth three-way valve (6), the bypass pipeline (9) and the thirteenth three-way valve (8) connected in sequence; In the fourth state, the third circuit (C) comprises the second pump body (1), the electric drive assembly (4), the cooling liquid channel of the third heat exchange member (5), the ninth three-way valve (6), the sixth heat exchange member (7) and the thirteenth three-way valve (8) connected in sequence.

11. The thermal management system of claim 1, wherein, The specific volume of the refrigerant circulating in the second refrigerant circuit is smaller than the specific volume of the refrigerant circulating in the first refrigerant circuit.

12. The thermal management system of claim 1, wherein, The second device is a battery pack (37), and the third coolant circuit includes a seventh circuit (G) including a fourth pump body (36), a coolant passage of the battery pack (37), a coolant passage of a seventh heat exchange member (38), a coolant passage of an eighth heat exchange member (39), and a battery coolant passage of a fifth heat exchange member (40) connected in series. The first refrigerant circuit includes an eleventh circuit (L) including the first compressor (11), a refrigerant passage of the second heat exchange member (12), a first electronic expansion valve (15), a first external condenser (16), a second electronic expansion valve (17), and a refrigerant passage of the eighth heat exchange member (39) connected in series. The second refrigerant circuit includes a twelfth circuit (M) including the second compressor (20), a refrigerant passage of the fourth heat exchange member (21), a third electronic expansion valve (23), a second external condenser (24), a fourth electronic expansion valve (25), and a refrigerant passage of the seventh heat exchange member (38) connected in series.

13. The thermal management system of claim 12, wherein, The first refrigerant circuit includes a thirteenth circuit (N) including the first compressor (11), a refrigerant passage of the second heat exchange member (12), the first electronic expansion valve (15), the first external condenser (16), a fifth electronic expansion valve (18), and an evaporator (19) connected in series.

14. The thermal management system of claim 1, wherein, The first coolant circuit includes a tenth circuit (K) including the first compressor (11), a refrigerant passage of the second heat exchange member (12), the first electronic expansion valve (15), the first external condenser (16), and a stop valve (14) connected in series.

15. A vehicle characterized by comprising: A thermal management system as claimed in any one of claims 1 to 14.

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