Thermal management system and vehicle

Abstract

The present application relates to a thermal management system and a vehicle, and belongs to the field of vehicle thermal management technology. The thermal management system includes a battery water circuit, a first heat exchanger, and a second heat exchanger; the battery water circuit, the first heat exchanger, and the second heat exchanger are connected to form a liquid flow loop; the first heat exchanger transfers heat to the battery water circuit after heat exchange; the second heat exchanger transfers cold to the battery water circuit after heat exchange; the battery water circuit is used to heat or cool the power battery of the vehicle. In this way, the heating and cooling working modes of the battery pack are independently controlled by the first heat exchanger and the second heat exchanger, which improves the response speed and accuracy of thermal management, makes it easier for the thermal management system to control the heating or cooling of the battery pack, and avoids the problem of complex regulation that may be caused by the need for a single heat exchanger to take into account both heating and cooling functions.

Description

Technical Field

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

[0002] The thermal management system is an efficient temperature regulation solution that has been widely used in new energy vehicles. At present, when the vehicle's indirect thermal management system is cooling, the refrigerant absorbs the heat of the passenger compartment or power battery through the evaporator to achieve cooling; when heating, the refrigerant indirectly transfers the heat of the external heat source to the passenger compartment or power battery to achieve heating.

[0003] In new energy vehicles, the temperature of the power battery is related to the performance, safety and overall endurance of the power battery. At present, when using the thermal management system to heat or cool the power battery, a more complex valve structure control is usually required. Therefore, how to more easily control the thermal management system to heat or cool the power battery to achieve the regulation of the power battery temperature is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a thermal management system and a vehicle, which more conveniently control the thermal management system to heat or cool the power battery, thereby achieving temperature regulation of the power battery, so as to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, a thermal management system provided according to a first aspect of the present application includes: a battery water circuit, a first heat exchanger and a second heat exchanger;

[0006] The battery water circuit, the first heat exchanger and the second heat exchanger are connected to form a liquid flow loop;

[0007] The first heat exchanger transfers heat to the battery water path after heat exchange;

[0008] The second heat exchanger transfers the cold energy to the battery water path after heat exchange;

[0009] The battery water circuit is used to heat or cool the power battery of the vehicle.

[0010] Optionally, a refrigeration assembly, the refrigeration assembly includes a compressor, a condenser and a third heat exchanger; the condenser has a refrigerant passage and a coolant passage; the third heat exchanger has a refrigerant passage and a coolant passage; the refrigerant passages of the compressor, the condenser and the third heat exchanger are connected;

[0011] The coolant passage of the condenser is connected to the first heat exchanger;

[0012] The coolant passage of the third heat exchanger is connected to the second heat exchanger.

[0013] Optionally, the refrigeration assembly further includes a liquid storage tank and an expansion valve;

[0014] The liquid storage tank and the expansion valve are connected to the compressor, the refrigerant passage of the condenser, and the refrigerant passage of the third heat exchanger.

[0015] Optionally, the first heat exchanger has a first passage and a second passage; the second heat exchanger has a first passage and a second passage;

[0016] The first passage of the first heat exchanger, the first passage of the second heat exchanger and the battery water passage are connected;

[0017] The second passage of the first heat exchanger is connected to the coolant passage of the condenser;

[0018] The second passage of the second heat exchanger is connected to the coolant passage of the third heat exchanger.

[0019] Optionally, it also includes a hot circulation pipeline and a cold circulation pipeline;

[0020] The heat circulation pipeline is connected to the coolant passage of the condenser and can be selectively connected to or disconnected from the first heat exchanger;

[0021] The cold circulation pipeline is connected to the coolant passage of the third heat exchanger and can be selectively connected to or disconnected from the second heat exchanger.

[0022] Optionally, a passenger compartment heat exchange circuit is also included, and the passenger compartment heat exchange circuit can be selectively connected in series, connected in parallel or disconnected with the cold circulation pipeline and the hot circulation pipeline respectively.

[0023] Optionally, the heat circulation pipeline includes a first switching pipeline, a second switching pipeline, a third switching pipeline and a fourth switching pipeline;

[0024] The fourth switching pipeline, the coolant passage of the condenser and the first switching pipeline are connected in series in sequence; the second switching pipeline and the passenger compartment heat exchange circuit are connected in parallel between the first switching pipeline and the third switching pipeline;

[0025] The thermal circulation pipeline also includes a first three-way valve and a second three-way valve;

[0026] The first valve port of the first three-way valve is connected to the first switching pipeline, the second valve port is connected to the passenger compartment heat exchange circuit, and the third valve port is connected to the second switching pipeline;

[0027] The first valve port of the second three-way valve is connected to the third switching pipeline, the second valve port is connected to the second heat exchanger, and the third valve port is connected to the fourth switching pipeline.

[0028] Optionally, the heat circulation pipeline further includes a first radiator and a first four-way valve;

[0029] The first valve port of the first four-way valve is connected to the inlet of the first radiator, the second valve port is connected to the outlet of the first radiator, the third valve port is connected to the third switching pipeline, and the fourth valve port is connected to the second switching pipeline and the passenger compartment heat exchange circuit.

[0030] Optionally, the cold circulation pipeline includes a fifth switching pipeline, a sixth switching pipeline, a seventh switching pipeline and an eighth switching pipeline;

[0031] The eighth switching pipeline, the coolant passage of the third heat exchanger and the fifth switching pipeline are connected in series in sequence; the seventh switching pipeline and the first heat exchanger are connected in parallel between the sixth switching pipeline and the eighth switching pipeline;

[0032] The cold circulation pipeline also includes a third three-way valve and a fourth three-way valve;

[0033] The first valve port of the third three-way valve is connected to the coolant passage of the third heat exchanger, the second valve port is connected to the fifth switching pipeline, and the third valve port is connected to the passenger compartment heat exchange circuit;

[0034] The first valve port of the fourth three-way valve is connected to the sixth switching pipeline, the second valve port is connected to the first heat exchanger, and the third valve port is connected to the seventh switching pipeline.

[0035] Optionally, the passenger compartment heat exchange circuit includes a cold core and a warm core connected in series;

[0036] The cold core and the warm core can be selectively connected in series, in parallel or disconnected with the cold circulation pipeline and the hot circulation pipeline respectively.

[0037] Optionally, the passenger compartment heat exchange circuit further includes a first two-way valve, a second two-way valve, a third two-way valve, a fourth two-way valve, a fifth two-way valve and a sixth two-way valve;

[0038] One end of the first two-way valve is connected to the cold circulation pipeline and one end of the second two-way valve, and the other end is connected to the hot circulation pipeline and the inlet of the heating core;

[0039] The other end of the second two-way valve is connected to the inlet of the cold core;

[0040] The third two-way valve is arranged in series between the inlet of the cold core and the outlet of the warm core;

[0041] One end of the fourth two-way valve is connected to the outlet of the heater core, and the other end is connected to one end of the sixth two-way valve and the heat circulation pipeline;

[0042] One end of the fifth two-way valve is connected to the other end of the sixth two-way valve, and the other end of the fifth two-way valve is connected to the cold circulation pipeline.

[0043] Optionally, the thermal management system further includes a motor heat exchange circuit, a second four-way valve and a third four-way valve, and the motor heat exchange circuit is provided with a motor electronic control system;

[0044] The second four-way valve is respectively connected to the motor heat exchange circuit and the cold circulation pipeline;

[0045] The third four-way valve is connected to the motor heat exchange circuit and the battery water circuit respectively.

[0046] Optionally, the motor heat exchange circuit includes a second radiator, a fifth three-way valve, a first motor heat exchange pipeline, a second motor heat exchange pipeline and a third motor heat exchange pipeline;

[0047] The first valve port of the second four-way valve is connected to one end of the first motor heat exchange pipeline, the second valve port is connected to one end of the third motor heat exchange pipeline, and the third valve port and the fourth valve port are connected to the cold circulation pipeline;

[0048] The first valve port of the fifth three-way valve is connected to the outlet of the second radiator, the second valve port is connected to the other end of the first motor heat exchange pipeline, and the third valve port is connected to one end of the second motor heat exchange pipeline;

[0049] The first valve port of the third four-way valve is connected to the other end of the second motor heat exchange pipeline, the second valve port is connected to the other end of the third motor heat exchange pipeline, and the third valve port and the fourth valve port are connected to the battery water circuit;

[0050] The inlet of the second radiator is connected to the other end of the first motor heat exchange pipeline;

[0051] The motor electronic control system is arranged on the first motor heat exchange pipeline.

[0052] According to a second aspect of the present application, a vehicle is provided, comprising a thermal management system as described above and a controller electrically connected to the thermal management system, wherein the controller is used to control the thermal management system so that the vehicle is in different thermal management modes.

[0053] In the thermal management system of the embodiment of the present application, through the above technical solution, the first heat exchanger exchanges heat with the heat source and transfers heat to the battery water circuit, ensuring that the battery pack can quickly heat up to a suitable operating temperature range to avoid performance degradation and damage caused by low temperature. At the same time, the second heat exchanger exchanges heat with the cold source and transfers the cold to the battery water circuit, and takes away the heat in the battery water circuit, preventing the battery pack from overheating in a high temperature environment and ensuring the safety and service life of the battery. The first heat exchanger and the second heat exchanger independently control the heating and cooling working modes of the battery pack, which improves the response speed and accuracy of thermal management, making it easier for the thermal management system to control the heating or cooling of the battery pack, and avoiding the problem of complex regulation that may be caused by a single heat exchanger having to take into account both heating and cooling functions.

[0054] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0056] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0057] Figure 1 It is a schematic diagram of the overall structure of a thermal management system provided in an exemplary embodiment of the present disclosure;

[0058] Figure 2 A schematic diagram of different operating modes of a passenger compartment heat exchange circuit provided in an exemplary embodiment of the present disclosure;

[0059] Figure 3 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode 1;

[0060] Figure 4 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode 2;

[0061] Figure 5 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode three;

[0062] Figure 6 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode 4;

[0063] Figure 7 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode five;

[0064] Figure 8 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode six;

[0065] Fig. 9 A schematic diagram of a thermal management system provided in an exemplary embodiment of the present disclosure in mode seven;

[0066] Description of reference numerals:

[0067] 1. Refrigeration assembly; 11. Compressor; 12. Condenser; 13. Liquid storage tank; 14. Expansion valve; 15. Third heat exchanger;

[0068] 2. Heat circulation pipeline; 21. First switching pipeline; 22. Second switching pipeline; 23. Third switching pipeline; 24. Fourth switching pipeline; 25. First three-way valve; 26. Second three-way valve; 27. First radiator; 28. First four-way valve; 29. ​​PTC heater;

[0069] 3. Cold circulation pipeline; 31. Fifth switching pipeline; 32. Sixth switching pipeline; 33. Seventh switching pipeline; 34. Eighth switching pipeline; 35. Third three-way valve; 36. Fourth three-way valve;

[0070] 4. Battery heat exchange circuit; 41. Battery heating path; 42. Battery cooling path; 43. Battery internal circulation path; 44. First heat exchanger; 45. Second heat exchanger; 46. Battery water path;

[0071] 5. Passenger compartment heat exchange circuit; 51. Cold core; 52. Warm core; 53. First two-way valve; 54. Second two-way valve; 55. Third two-way valve; 56. Fourth two-way valve; 57. Fifth two-way valve; 58. Sixth two-way valve;

[0072] 6. Motor heat exchange circuit; 61. First motor heat exchange pipeline; 62. Second motor heat exchange pipeline; 63. Third motor heat exchange pipeline; 64. Second four-way valve; 65. Third four-way valve; 66. Second radiator; 67. Fifth three-way valve; 68. Motor electronic control system;

[0073] 71. First water pump; 72. Second water pump; 73. Third water pump; 74. Fourth water pump. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0075] This application provides a thermal management system. Figure 1 , Figure 1 It is a schematic diagram of the overall structure of the thermal management system.

[0076] The thermal management system includes a battery water circuit 46 , a first heat exchanger 44 and a second heat exchanger 45 .

[0077] Among them, the battery water circuit 46, the first heat exchanger 44 and the second heat exchanger 45 are connected to form a liquid flow loop; the first heat exchanger 44 transfers heat to the battery water circuit 46 after heat exchange; the second heat exchanger 45 transfers cold to the battery water circuit 46 after heat exchange; the battery water circuit 46 is used to heat or cool the power battery of the vehicle.

[0078] The first heat exchanger 44 and the second heat exchanger 45 may be water-to-water plate heat exchangers, which are devices used for heat exchange between liquids. In this embodiment, both passages of the first heat exchanger 44 and the second heat exchanger 45 are used for circulating cooling liquid.

[0079] In the above embodiment, the first heat exchanger 44 exchanges heat with the heat source and transfers heat to the battery water path 46, ensuring that the battery pack can quickly heat up to a suitable operating temperature range to avoid performance degradation and damage caused by low temperature. At the same time, the second heat exchanger 45 exchanges heat with the cold source and transfers the cold energy to the battery water path 46, and takes away the heat in the battery water path 46, thereby preventing the battery pack from overheating in a high temperature environment and ensuring the safety and service life of the battery. The heating and cooling working modes of the battery pack are independently controlled by the first heat exchanger and the second heat exchanger, which improves the response speed and accuracy of thermal management, making it easier for the thermal management system to control the heating or cooling of the battery pack, and avoiding the problem of complex regulation that may be caused by a single heat exchanger having to take into account both heating and cooling functions.

[0080] Reference Figure 1As a further implementation of the thermal management system, the thermal management system also includes a refrigeration component, which includes a compressor 11, a condenser 12 and a third heat exchanger 15; the condenser 12 has a refrigerant passage and a coolant passage; the third heat exchanger 15 has a refrigerant passage and a coolant passage; the compressor 11, the refrigerant passage of the condenser 12 and the refrigerant passage of the third heat exchanger 15 are connected; the coolant passage of the condenser 12 is connected to the first heat exchanger 44; the coolant passage of the third heat exchanger 15 is connected to the second heat exchanger 45.

[0081] In some embodiments, the refrigeration assembly further includes a liquid storage tank 13 and an expansion valve 14 ; the liquid storage tank 13 and the expansion valve 14 are connected to the refrigerant passage of the compressor 11 , the condenser 12 , and the refrigerant passage of the third heat exchanger 15 .

[0082] Among them, the condenser 12 can be a water-cooled condenser, the refrigerant passage of the condenser 12 is used to circulate the refrigerant, and the coolant passage of the condenser 12 is used to circulate the coolant. The third heat exchanger 15 can be a plate heat exchanger, the refrigerant passage of the third heat exchanger 15 is used to circulate the refrigerant, and the refrigerant passage of the third heat exchanger 15 is interconnected with the refrigerant passage of the condenser 12. The coolant passage of the third heat exchanger 15 is used to circulate the coolant. For example, the refrigerant can be, but not limited to, R134a (tetrafluoroethane), R410a (a mixture of difluoromethane and pentafluoroethane), carbon dioxide and R290 (propane), etc. The coolant can be, but not limited to, ethanol-type circulating coolant, methanol-type circulating coolant, calcium chloride-type circulating coolant, etc.

[0083] In some embodiments, the first heat exchanger 44 has a first passage and a second passage; the second heat exchanger 45 has a first passage and a second passage.

[0084] Among them, the first passage of the first heat exchanger 44, the first passage of the second heat exchanger 45 and the battery water passage 46 are connected; the second passage of the first heat exchanger 44 is connected to the coolant passage of the condenser 12; the second passage of the second heat exchanger 45 is connected to the coolant passage of the third heat exchanger 15.

[0085] Among them, refer to Figure 1 As an example, the first passage of the first heat exchanger 44, the first passage of the second heat exchanger 45 and the battery water passage 46 form a battery internal circulation passage 43 of the battery pack. The second passage of the first heat exchanger 44 forms a battery cooling passage 42, and the second passage of the second heat exchanger 45 forms a battery heating passage 41.

[0086] It should be understood that in the present embodiment, regardless of whether the battery pack is heated or cooled, the coolant in the battery internal circulation passage 43 needs to circulate. Since the first passage of the first heat exchanger 44 and the first passage of the second heat exchanger 45 are connected in series, when the battery pack is heated or cooled, the coolant can circulate in the same direction when circulating in the battery internal circulation passage 43, without changing the circulation direction of the battery internal circulation passage 43, thereby making the control of the heating or cooling of the battery pack simpler.

[0087] In some embodiments, the thermal management system further includes a hot circulation pipeline 2 and a cold circulation pipeline 3 .

[0088] Among them, the hot circulation pipeline 2 is connected to the coolant passage of the condenser 12, and can be selectively connected or disconnected with the first heat exchanger 44; the cold circulation pipeline 3 is connected to the coolant passage of the third heat exchanger 15, and can be selectively connected or disconnected with the second heat exchanger 45.

[0089] As an example, when the battery pack needs to be heated, the heat circulation pipeline 2 is connected to the battery heating passage 41, that is, connected to the second passage of the second heat exchanger 45, and the heat is transferred to the first passage of the second heat exchanger 45 through the second passage of the second heat exchanger 45, and then the heat is transferred to the battery water passage 46 through the battery internal circulation passage 43. The battery water passage 46 is in direct contact with the battery pack to achieve heating of the battery pack. When the battery pack needs to be cooled, the cold circulation pipeline 3 is connected to the battery cooling passage 42, that is, connected to the second passage of the first heat exchanger 44. At this time, the heat of the battery pack is first transferred to the first passage of the first heat exchanger 44 through the battery internal circulation passage 43, and then the heat is transferred to the second passage of the first heat exchanger 44 through the heat exchange inside the first heat exchanger 44. The second passage of the first heat exchanger 44 continues to transfer the heat to the cold circulation pipeline 3, thereby taking away the excess heat of the battery pack and achieving cooling of the battery pack.

[0090] In some embodiments, the thermal management system further includes a passenger compartment heat exchange circuit 5 , which can be selectively connected in series, in parallel, or disconnected with the cold circulation pipeline 3 and the hot circulation pipeline 2 , respectively.

[0091] It should be understood that the refrigerant passages of the compressor 11, the condenser 12, the liquid storage tank 13, the expansion valve 14, and the third heat exchanger 15 are connected in series in sequence, so that the refrigerant will only flow in the refrigeration component 1, and will not flow through the coolant passages of the condenser 12 and the coolant passages of the third heat exchanger 15 to the battery heat exchange circuit 4 and the passenger compartment heat exchange circuit 5, thereby achieving the isolation of the refrigerant and the coolant. Among them, the compressor 11 compresses the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the condenser 12, and exchanges heat with the coolant passage through the refrigerant passage of the condenser 12, thereby releasing heat and condensing into liquid. The condensed refrigerant liquid is decompressed through the expansion valve 14 and enters the third heat exchanger 15, where it evaporates and absorbs heat, thereby achieving refrigeration.

[0092] Furthermore, in the refrigeration cycle, the cold circulation pipeline 3 is connected to the coolant passage of the third heat exchanger 15, so that the coolant can flow through the third heat exchanger 15 and perform heat exchange with the refrigerant. When the refrigerant evaporates in the third heat exchanger 15, it absorbs the heat in the coolant, thereby cooling the coolant. The cooled coolant is transported to the area that needs to be refrigerated, such as the passenger compartment or the battery pack, through the cold circulation pipeline 3, so as to achieve the transfer of cold air. The hot circulation pipeline 2 is connected to the coolant passage of the condenser 12, so that the coolant can flow through the condenser 12 and perform heat exchange with the refrigerant. During the condensation process of the condenser 12, the refrigerant will release heat to the coolant, so that the coolant is heated up, and the heated coolant is transported to the area that needs to be heated, such as the battery pack or the passenger compartment, so as to achieve heat transfer.

[0093] In some examples, when both the battery pack and the passenger compartment need to be heated, the battery heating passage 41 and the passenger compartment heat exchange circuit 5 can be controlled to be connected to the heat circulation pipeline 2 at the same time, and the passenger compartment heat exchange circuit 5 is connected in parallel with the heat circulation pipeline 2. When both the battery pack and the passenger compartment need to be cooled, the battery cooling passage 42 and the passenger compartment heat exchange circuit 5 can be controlled to be connected to the cold circulation pipeline 3 at the same time. When the battery pack needs to be cooled and the passenger compartment needs to be heated, the battery cooling passage 42 is controlled to be connected to the cold circulation pipeline 3, and the passenger compartment heat exchange circuit 5 is connected in series with the heat circulation pipeline 2. In this way, the cooling and heating of the battery pack and the passenger compartment can be independently operated according to actual needs.

[0094] In the above embodiment, the refrigeration cycle is first realized by connecting the refrigerant passage of the condenser 12, the liquid storage tank 13, the expansion valve 14 and the refrigerant passage of the third heat exchanger 15 in series in sequence, and then the heat carried by the coolant in the coolant passage of the condenser 12 is transferred through the heat circulation pipeline 2. The coolant passage of the third heat exchanger 15 is connected through the cold circulation pipeline 3 to transfer the cold carried by the coolant in the coolant passage of the third heat exchanger 15. Secondly, the battery heating passage 41 and the battery cooling passage 42 can be selectively connected and disconnected with the heat circulation pipeline 2 or the cold circulation pipeline 3, and the heat or cold is transferred to the battery internal circulation passage 43 to achieve heating or cooling of the battery. Similarly, the passenger compartment heat exchange circuit 5 can be selectively connected in series, connected in parallel or disconnected with the cold circulation pipeline 3 and the heat circulation pipeline 2, respectively, and heat or cold can be transferred to the passenger compartment heat exchange circuit 5 to achieve heating or cooling of the passenger compartment. In both the hot circulation pipeline 2 and the cold circulation pipeline 3, the heat or cold is transferred to the battery pack or the passenger compartment through the coolant, and the refrigerant circulates only in the refrigeration component 1, thereby realizing the isolation between the refrigerant and the passenger compartment. Therefore, a variety of refrigerants including flammable refrigerants can be flexibly used. For example, R290 and other flammable and explosive gases can be selected as refrigerants without safety hazards. When switching between different modes, it is only necessary to control the flow direction of the coolant. Compared with the solution of transferring heat or cold to the passenger compartment and battery pack through the refrigerant, the control requirements for the flow and pressure of the coolant are greatly reduced when transferring heat or cold to the passenger compartment and battery pack through the coolant, which makes it easier to control the flow direction of the coolant, thereby improving the flexibility of the thermal management system, and thus realizing the effect that the thermal management system can flexibly switch between different modes.

[0095] In an alternative embodiment, the heat circulation pipeline 2 includes a first switching pipeline 21 , a second switching pipeline 22 , a third switching pipeline 23 , a fourth switching pipeline 24 , a first three-way valve 25 and a second three-way valve 26 .

[0096] Among them, the fourth switching pipeline 24, the coolant passage of the condenser 12 and the first switching pipeline 21 are connected in series in sequence; the second switching pipeline 22 and the passenger compartment heat exchange circuit 5 are connected in parallel between the first switching pipeline 21 and the third switching pipeline 23. The first valve port of the first three-way valve 25 is connected to the first switching pipeline 21, the second valve port is connected to the passenger compartment heat exchange circuit 5, and the third valve port is connected to the second switching pipeline 22. The first valve port of the second three-way valve 26 is connected to the third switching pipeline 23, the second valve port is connected to the battery heating passage 41, and the third valve port is connected to the fourth switching pipeline 24.

[0097] The first three-way valve 25 is used to control the first switching pipeline 21 to be connected to the second switching pipeline 22 or to be connected to the passenger compartment heat exchange circuit 5, and the second three-way valve 26 is used to control the battery heating passage 41 to be connected to or disconnected from the third switching pipeline 23 and the fourth switching pipeline 24. For example, when the passenger compartment needs to be heated but the battery pack does not need to be heated, the first valve port of the first three-way valve 25 is controlled to be connected to the second valve port thereof, and the first valve port of the second three-way valve 26 is controlled to be connected to the third valve port thereof; when both the passenger compartment and the battery pack need to be heated, the first valve port of the first three-way valve 25 is controlled to be connected to the second valve port thereof, and the first valve port of the second three-way valve 26 is controlled to be connected to the second valve port thereof.

[0098] In the above embodiment, the valve ports of the first three-way valve 25 and the second three-way valve 26 can be opened or closed as needed, so that the coolant can flow into the passenger compartment heat exchange circuit 5 and the battery heating passage 41 simultaneously or separately, thereby realizing switching of multiple modes such as separate heating of the passenger compartment, separate heating of the battery, or simultaneous heating of the passenger compartment battery pack.

[0099] Reference Figure 1 In some embodiments, the heat circulation pipeline 2 further includes a first radiator 27 and a first four-way valve 28. The first valve port of the first four-way valve 28 is connected to the inlet of the first radiator 27, the second valve port is connected to the outlet of the first radiator 27, the third valve port is connected to the third switching pipeline 23, and the fourth valve port is connected to the second switching pipeline 22 and the passenger compartment heat exchange circuit 5.

[0100] It should be understood that the first switching pipeline 21, the second switching pipeline 22, the third switching pipeline 23 and the fourth switching pipeline 24 can form a circulation loop with the condenser 12. When the cooling demand of the thermal management system is large, it is difficult to effectively dissipate the large amount of heat generated in the condenser 12 through the natural heat dissipation of the coolant in the first switching pipeline 21, the second switching pipeline 22, the third switching pipeline 23 and the fourth switching pipeline 24. Therefore, by setting the first four-way valve 28 and the first radiator 27 between the second switching pipeline 22 and the third switching pipeline 23, when heat dissipation is required, the first valve port of the first four-way valve 28 is controlled to be connected with its fourth valve port and the second valve port is controlled to be connected with its third valve port, so that the coolant in the second switching pipeline 22 passes through the fourth valve port and the first valve port of the first four-way valve 28 in sequence and enters the inlet of the first radiator 27. After the heat is dissipated by the first radiator 27, the coolant passes through the second valve port and the third valve port of the first four-way valve 28 in sequence from the outlet of the first radiator 27 and enters the third switching pipeline 23, thereby realizing the heat dissipation of the coolant, which helps to dissipate the large amount of heat generated by the condenser 12 to the external environment.

[0101] Reference Figure 1In some embodiments, the thermal cycle pipeline 2 further includes a PTC (Positive Temperature Coefficient) heater 29, which is connected in series between the coolant passage of the condenser 12 and the first switching pipeline 21. The PTC heater 29 can be turned on or off according to actual conditions. When the PTC heater 29 is in the on state, the coolant flowing through the thermal cycle pipeline 2 can be heated to supplement heat to the passenger compartment heat exchange circuit 5 and the battery heat exchange circuit 4. When the PTC heater 29 is in the off state, it is only used as a circulation pipeline to transfer the coolant in the coolant passage of the condenser 12 to the first switching pipeline 21.

[0102] Continue to refer to Figure 1 In some embodiments, the cold circulation pipeline 3 includes a fifth switching pipeline 31 , a sixth switching pipeline 32 , a seventh switching pipeline 33 , an eighth switching pipeline 34 , a third three-way valve 35 and a fourth three-way valve 36 .

[0103] Among them, the eighth switching pipeline 34, the coolant passage of the third heat exchanger 15 and the fifth switching pipeline 31 are connected in series in sequence, and the seventh switching pipeline 33 and the battery cooling passage 42 are connected in parallel between the sixth switching pipeline 32 and the eighth switching pipeline 34. The first valve port of the third three-way valve 35 is connected to the coolant passage of the third heat exchanger 15, the second valve port is connected to the fifth switching pipeline 31, and the third valve port is connected to the seventh switching pipeline 33; the first valve port of the fourth three-way valve 36 is connected to the sixth switching pipeline 32, the second valve port is connected to the battery cooling passage 42, and the third valve port is connected to the seventh switching pipeline 33.

[0104] The coolant passage of the third heat exchanger 15 is controlled to be connected with the fifth switching pipeline 31 or the passenger compartment heat exchange circuit 5 by the third three-way valve 35, and the sixth switching pipeline 32 is controlled to be connected with the seventh switching pipeline 33 or the battery cooling passage 42 by the fourth three-way valve 36. For example, when the passenger compartment needs to be cooled but the battery pack does not need to be cooled, the first valve port of the third three-way valve 35 is controlled to be connected with the third valve port thereof, and the first valve port of the fourth three-way valve 36 is controlled to be connected with the third valve port thereof; when both the passenger compartment and the battery pack need to be cooled, the first valve port, the second valve port and the third valve port of the third three-way valve 35 are controlled to be connected at the same time, and the first valve port of the fourth three-way valve 36 is controlled to be connected with the second valve port thereof.

[0105] Reference Figure 1 and Figure 2 In some embodiments, the passenger compartment heat exchange circuit 5 includes a cold core 51 and a warm core 52 connected in series in sequence; the cold core 51 and the warm core 52 can be selectively connected in series, in parallel, or disconnected with the cold circulation pipeline 3 and the hot circulation pipeline 2.

[0106] In the above embodiment, the cold core 51 and the warm core 52 are connected in series. When heating is required, the series-connected cold core 51 and the warm core 52 are simultaneously connected in series or in parallel to the heat circulation pipeline 2, and the cold core 51 acts as a temporary warm core. When cooling is required, the series-connected cold core 51 and the warm core 52 are simultaneously connected in series or in parallel to the cold circulation pipeline 3, and the warm core 52 acts as a temporary cold core, thereby increasing the heat exchange area to achieve better heating or cooling effects.

[0107] In addition, in some embodiments, the passenger compartment heat exchange circuit 5 also includes a first two-way valve 53 , a second two-way valve 54 , a third two-way valve 55 , a fourth two-way valve 56 , a fifth two-way valve 57 and a sixth two-way valve 58 .

[0108] Among them, one end of the first two-way valve 53 is connected to the cold circulation pipeline 3 and one end of the second two-way valve 54, and the other end is connected to the hot circulation pipeline 2 and the inlet of the warm core 52. The other end of the second two-way valve 54 is connected to the inlet of the cold core 51. The third two-way valve 55 is arranged in series between the inlet of the cold core 51 and the outlet of the warm core 52. One end of the fourth two-way valve 56 is connected to the outlet of the warm core 52, and the other end is connected to one end of the sixth two-way valve 58 and the hot circulation pipeline 2. One end of the fifth two-way valve 57 is connected to the other end of the sixth two-way valve 58, and the other end of the fifth two-way valve 57 is connected to the cold circulation pipeline 3.

[0109] Furthermore, by changing the on-off states of the first two-way valve 53, the second two-way valve 54, the third two-way valve 55, the fourth two-way valve 56, the fifth two-way valve 57 and the sixth two-way valve 58, not only can the cold core 51 and the warm core 52 be used in series, but the cold core 51 and the warm core 52 can also be used separately, which can achieve more flexible heating or cooling according to actual conditions.

[0110] Combination Figure 2 , in some examples, Figure 2 (a) is a schematic diagram of the cold core 51 and the warm core 52 being used in series in the passenger compartment heating mode. In this mode, the third two-way valve 55 and the sixth two-way valve 58 are turned on, and the other two-way valves are turned off, so that the coolant in the first switching pipeline 21 is transmitted to the third switching pipeline 23 after passing through the warm core 52 and the cold core 51 in sequence. Figure 2 (b) is a schematic diagram of using only the heater core 52 in the passenger compartment heating mode. In this mode, the fourth two-way valve 56 is turned on, and the other two-way valves are closed, so that the coolant only flows through the heater core 52. Figure 2(c) is a schematic diagram of the cold core 51 and the warm core 52 being used in series in the passenger compartment cooling mode. In this mode, the first two-way valve 53, the third two-way valve 55 and the fifth two-way valve 57 are turned on, and the other two-way valves are turned off. At this time, the warm core 52 and the cold core 51 are connected in parallel to the fourth switching pipeline 24, so that the coolant passes through the warm core 52 and the cold core 51 in sequence before being transmitted to the fourth switching pipeline 24. Figure 2 (d) is a schematic diagram of using only the cold core 51 in the passenger compartment cooling mode. In this mode, the second two-way valve 54 and the fifth two-way valve 57 are turned on, and the other two-way valves are turned off, so that the coolant only flows through the cold core 51.

[0111] Please continue to refer to Figure 1 In some embodiments, the thermal management system further includes a motor heat exchange circuit 6 , a second four-way valve 64 and a third four-way valve 65 .

[0112] The motor heat exchange loop 6 is provided with a motor electronic control system 68, which is a system for controlling and driving the motor in the vehicle, and generates heat during normal driving of the vehicle. The second four-way valve 64 is connected to the motor heat exchange loop 6 and the cold circulation pipeline 3 respectively; the third four-way valve 65 is connected to the motor heat exchange loop 6 and the battery water circuit 46 respectively.

[0113] In the above embodiment, the motor heat exchange loop 6 transfers the heat generated during the operation of the motor electronic control system 68. The heat exchange between the motor heat exchange loop 6 and the cold circulation pipeline 3 can be realized through the second four-way valve 64, so that when the heating demand is large, the heat generated in the motor electronic control system 68 can be transferred to the third heat exchanger 15 through the cold circulation pipeline 3 to serve as a supplementary heat source. The heat exchange between the motor heat exchange loop 6 and the battery water circuit 46 can be realized through the third four-way valve 65, so that the heat generated by the motor electronic control system 68 can be directly transferred to the battery water circuit 46 to achieve heating of the battery pack. Through the arrangement of the motor heat exchange loop 6, the second four-way valve 64 and the third four-way valve 65, the excess heat generated during the operation of the motor electronic control system 68 can be fully utilized to achieve energy reuse and further reduce energy consumption.

[0114] In some embodiments, the motor heat exchange circuit 6 includes a second radiator 66 , a fifth three-way valve 67 , a first motor heat exchange pipeline 61 , a second motor heat exchange pipeline 62 , and a third motor heat exchange pipeline 63 .

[0115] Among them, the first valve port of the second four-way valve 64 is connected to one end of the first motor heat exchange pipeline 61, the second valve port is connected to one end of the third motor heat exchange pipeline 63, and the third valve port and the fourth valve port are connected to the cold circulation pipeline 3. The first valve port of the fifth three-way valve 67 is connected to the outlet of the second radiator 66, the second valve port is connected to the other end of the first motor heat exchange pipeline 61, and the third valve port is connected to one end of the second motor heat exchange pipeline 62. The first valve port of the third four-way valve 65 is connected to the other end of the second motor heat exchange pipeline 62, the second valve port is connected to the other end of the third motor heat exchange pipeline 63, and the third valve port and the fourth valve port are connected to the battery water circuit 46. The inlet of the second radiator 66 is connected to the other end of the first motor heat exchange pipeline 61. The motor electronic control system 68 is arranged on the first motor heat exchange pipeline 61.

[0116] It should be understood that the second motor heat exchange pipeline 62 can be selectively connected in series with the second radiator 66 or with the first motor heat exchange pipeline 61 by setting the fifth three-way valve 67. The second four-way valve 64 can be used to control the cold circulation pipeline 3 and the motor heat exchange circuit 6 to operate independently, and the cold circulation pipeline 3 and the motor heat exchange circuit 6 can be controlled to be connected for heat exchange. The third four-way valve 65 can be used to control the motor heat exchange circuit 6 and the battery water circuit 46 to operate independently, and the motor heat exchange circuit 6 and the battery water circuit 46 can be controlled to be connected for heat exchange.

[0117] In some examples, the first motor heat exchange pipeline 61 includes a first pipe section and a second pipe section connected in sequence, the first pipe section is connected to the first valve port of the second four-way valve 64, and the second pipe section is connected to the second valve port of the fifth three-way valve 67. The motor electronic control system 68 is arranged in the first pipe section, so that the motor electronic control system 68 is located in the front stage of the second radiator 66. For example, when it is necessary to recover the heat of the motor electronic control system 68, the first valve port of the fifth three-way valve 67 is controlled to be connected with the second valve port thereof, and the heat generated by the operation of the motor electronic control system 68 on the first pipe section of the first motor heat exchange pipeline 61 is first absorbed, and then the heat of the external environment is absorbed through the second radiator 66. Alternatively, the second valve port of the fifth three-way valve 67 is controlled to be connected with the third valve port thereof, and only the heat generated by the operation of the motor electronic control system 68 is recovered.

[0118] As a further implementation of the thermal management system, the thermal management system also includes a water pump group, which includes a first water pump 71 connected in series to the hot circulation pipeline 2, a second water pump 72 connected in series to the cold circulation pipeline 3, a third water pump 73 connected in series to the battery internal circulation passage 43, and a fourth water pump 74 connected in series to the motor heat exchange loop 6, so as to ensure that the coolant in the hot circulation pipeline 2, the cold circulation pipeline 3, the battery internal circulation passage 43 and the motor heat exchange loop 6 can circulate normally.

[0119] Reference Figure 3-Figure 9 , Figure 3-Figure 9 It is the operating state of the thermal management system under different thermal management modes. The working process of the thermal management system under different thermal management modes will be described exemplarily below to further illustrate the specific working principle of the embodiment of the present application.

[0120] Reference Figure 3 , Figure 3 The state combination of each circuit when the thermal management system is in mode 1 is illustrated. Mode 1 is a dual cooling mode for the passenger compartment and the battery pack. First, the first valve port of the first three-way valve 25 is connected to its third valve port, the first valve port of the first four-way valve 28 is connected to its fourth valve port and the second valve port is connected to its third valve port, and the first valve port of the second three-way valve 26 is connected to its third valve port. At this time, the first switching pipeline 21, the second switching pipeline 22, the first radiator 27, the third switching pipeline 23, the fourth switching pipeline 24 and the coolant passage of the condenser 12 form a closed loop circuit for coolant heat dissipation, and the coolant in the coolant passage of the condenser 12 is dissipated, so that the coolant temperature in the coolant passage of the third heat exchanger 15 is reduced through the refrigeration component 1. Then, the first valve port, the second valve port and the third valve port of the third three-way valve 35 are controlled to be connected to each other, and the first valve port of the fourth three-way valve 36 is connected to its second valve port. At this time, the coolant passage of the third heat exchanger 15 is simultaneously connected to the passenger compartment heat exchange circuit 5 and the fifth switching pipeline 31, and a closed loop of cold circulation is formed through the coolant passage of the third heat exchanger 15, the fifth switching pipeline 31, the sixth switching pipeline 32, the battery cooling passage 42 and the eighth switching pipeline 34, thereby achieving the effect of simultaneous cooling of the passenger compartment and the battery pack.

[0121] Reference Figure 4 , Figure 4The example shows the state combination of each circuit when the thermal management system is in mode 2. Mode 2 is the passenger compartment heating and battery pack cooling mode. First, the first valve port of the third three-way valve 35 is controlled to be connected with its second valve port, the third valve port of the second four-way valve 64 is connected with its fourth valve port, and the first valve port of the fourth three-way valve 36 is connected with its second valve port. At this time, the coolant passage of the third heat exchanger 15, the fifth switching pipeline 31, the sixth switching pipeline 32, the battery cooling passage 42 and the eighth switching pipeline 34 form a closed loop of cold circulation, so as to transfer the heat of the battery pack to the third heat exchanger 15, thereby realizing the cooling of the battery pack. At the same time, the heat transferred to the third heat exchanger 15 is transferred to the coolant passage of the condenser 12 through the refrigeration assembly 1. Then, the first valve port of the first three-way valve 25 is controlled to be connected to its second valve port, the third valve port of the first four-way valve 28 is connected to its fourth valve port, and the first valve port of the second three-way valve 26 is connected to its third valve port. At this time, the first switching pipeline 21, the second switching pipeline 22, the passenger compartment heat exchange circuit 5, the third switching pipeline 23, the fourth switching pipeline 24 and the coolant passage of the condenser 12 form a closed loop of heat circulation, and the heat of the coolant in the coolant passage of the condenser 12 is transferred to the passenger compartment heat exchange circuit 5 to achieve the effect of heating the passenger compartment.

[0122] Reference Figure 5 , Figure 5 The state combination of each circuit when the thermal management system is in mode 3 is illustrated. Mode 3 is a dual heating mode for the passenger compartment and the battery pack. First, the first valve port of the third three-way valve 35 is controlled to be connected to its second valve port, the first valve port of the second four-way valve 64 is connected to its second valve port and the third valve port is connected to its fourth valve port, the first valve port of the third four-way valve 65 is connected to its second valve port and the third valve port is connected to its fourth valve port. At this time, the coolant passage of the third heat exchanger 15, the fifth switching pipeline 31, the first motor heat exchange pipeline 61, the second radiator 66, the second motor heat exchange pipeline 62 and the third motor heat exchange pipeline 63 form a closed loop circuit for coolant heat absorption, so that the coolant temperature in the coolant passage of the condenser 12 is increased through the circulation of the refrigeration component 1. Then, the first valve port of the first three-way valve 25 is connected to its second valve port, the third valve port of the first four-way valve 28 is connected to its fourth valve port, and the first valve port, the second valve port and the third valve port of the second three-way valve 26 are connected to each other. At this time, the first switching pipeline 21, the second switching pipeline 22, the passenger compartment heat exchange circuit 5, the third switching pipeline 23, the battery heating passage 41, the fourth switching pipeline 24 and the coolant passage of the condenser 12 form a closed loop of heat circulation, and the heat of the coolant in the coolant passage of the condenser 12 is transferred to the battery heating passage 41 and the passenger compartment heat exchange circuit 5, so as to achieve the effect of heating the passenger compartment and the battery pack at the same time.

[0123] Reference Figure 6 , Figure 6The state combination of each circuit when the thermal management system is in mode 4 is illustrated. Mode 4 is a dual heating mode for the passenger compartment and the battery pack using the residual heat of the motor. The difference between mode 4 and mode 3 is that the first valve port of the third three-way valve 35 is connected to its third valve port. At this time, the coolant passage of the third heat exchanger 15, the fifth switching pipeline 31, the first motor heat exchange pipeline 61, the second motor heat exchange pipeline 62 and the third motor heat exchange pipeline 63 form a closed loop circuit for coolant heat absorption, and do not flow through the second radiator 66. Only the residual heat of the motor electronic control system 68 in the first motor heat exchange pipeline 61 after stopping operation is recovered.

[0124] Reference Figure 7 , Figure 7 The state combination of each circuit when the thermal management system is in mode five is illustrated. Mode five is a mode for heating the battery using the residual heat of the motor. By controlling the first valve port of the second four-way valve 64 to be connected to its second valve port, the second valve port of the fifth three-way valve 67 to be connected to its third valve port, the first valve port of the third four-way valve 65 to be connected to its third valve port and the second valve port to be connected to its fourth valve port, at this time, the first motor heat exchange pipeline 61, the second motor heat exchange pipeline 62, the battery internal circulation passage 43 and the third motor heat exchange pipeline 63 form a closed loop of heat circulation, and the heat generated in the motor electronic control system 68 on the first motor heat exchange pipeline 61 is transferred to the battery internal circulation passage 43 to heat the battery pack. Heat is exchanged by directly connecting the motor heat exchange circuit 6 and the battery internal circulation passage 43, without the need for heat exchange through the battery heating passage 41 of the second heat exchanger 45, which reduces heat loss and further improves the utilization rate of residual heat.

[0125] Reference Figure 8 , Figure 8 The state combination of each circuit when the thermal management system is in mode six is ​​illustrated. Mode six is ​​the battery natural cooling mode, which is suitable for the scenario where the motor electronic control system 68 stops running and does not generate a lot of heat. By controlling the first valve port of the second four-way valve 64 to be connected to its second valve port, the first valve port of the fifth three-way valve 67 to be connected to its third valve port, the first valve port of the third four-way valve 65 to be connected to its third valve port and the second valve port to be connected to its fourth valve port, at this time, the first motor heat exchange pipeline 61, the second and third heat exchangers 15, the second motor heat exchange pipeline 62, the battery internal circulation passage 43 and the third motor heat exchange pipeline 63 form a closed loop for heat dissipation, and the heat generated by the battery pack is transferred to the second radiator 66 through the battery internal circulation passage 43, and then the second radiator 66 is used to transfer the corresponding heat to the external environment, thereby realizing natural cooling of the battery pack. In this mode, the refrigeration component 1 does not need to be operated, and no additional cooling capacity is required, which reduces energy consumption.

[0126] Reference Fig. 9 , Fig. 9The state combination of each circuit when the thermal management system is in mode seven is illustrated. Mode seven is the passenger compartment dehumidification mode. First, by controlling the first valve port of the third three-way valve 35 to be connected to its third valve port, the second two-way valve 54 is turned on, the fifth two-way valve 57 is turned on, the third valve port of the second four-way valve 64 is connected to its fourth valve port, and the first valve port of the fourth three-way valve 36 is connected to its third valve port, at this time, the coolant passage of the third heat exchanger 15, the cold core 51, the sixth switching pipeline 32, the seventh switching pipeline 33 and the eighth switching pipeline 34 form a closed loop circuit of cold circulation, reducing the air temperature in the passenger compartment to below the dew point to analyze the water in the air. Then, the first valve port of the first three-way valve 25 is controlled to be connected to its second valve port, the fourth two-way valve 56 is turned on, the third valve port of the first four-way valve 28 is connected to its fourth valve port, and the first valve port of the second three-way valve 26 is connected to its third valve port. At this time, the first switching pipeline 21, the second switching pipeline 22, the warm core 52, the third switching pipeline 23, the fourth switching pipeline 24 and the coolant passage of the condenser 12 form a closed loop of heat circulation, which increases the air temperature in the passenger compartment to compensate for the lowered temperature caused by the analysis of water in the air, improves the comfort of the passenger compartment, and thus achieves the effect of dehumidifying the passenger compartment.

[0127] In a second aspect, in one embodiment, the present application provides a vehicle, comprising a thermal management system as described above and a controller connected to the thermal management system. The controller is used to control the thermal management system so that the vehicle is in different thermal management modes (such as the aforementioned modes 1 to 7) to achieve the thermal management function of the vehicle.

[0128] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present disclosure does not make any specific limitation on this.

[0129] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0130] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0131] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0132] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A thermal management system, It is characterized in that It includes a battery water circuit, a first heat exchanger and a second heat exchanger; The battery water circuit, the first heat exchanger and the second heat exchanger are connected to form a liquid flow loop; The first heat exchanger transfers heat to the battery water path after heat exchange; The second heat exchanger transfers the cold energy to the battery water path after heat exchange; The battery water circuit is used to heat or cool the power battery of the vehicle; The first heat exchanger has a first passage and a second passage; the first passage of the first heat exchanger, the first passage of the second heat exchanger and the battery water passage form a battery internal circulation passage of the battery pack; the second heat exchanger has a first passage and a second passage; the first passage of the first heat exchanger, the first passage of the second heat exchanger and the battery water passage are connected; wherein the first passage of the first heat exchanger and the first passage of the second heat exchanger are connected in series; It also includes a motor heat exchange circuit and a third four-way valve; the third four-way valve is connected to the motor heat exchange circuit and the battery water circuit respectively; It also includes hot circulation pipelines and cold circulation pipelines; The passenger compartment heat exchange circuit also includes a passenger compartment heat exchange circuit, which includes a cold core and a warm core connected in series in sequence; when heating is required, the cold core and the warm core connected in series are simultaneously connected in series or in parallel to the heat circulation pipeline; when cooling is required, the cold core and the warm core connected in series are simultaneously connected in series or in parallel to the cold circulation pipeline; The passenger compartment heat exchange circuit also includes a first two-way valve, a second two-way valve, a third two-way valve, a fourth two-way valve, a fifth two-way valve and a sixth two-way valve; One end of the first two-way valve is connected to the cold circulation pipeline and one end of the second two-way valve, and the other end is connected to the hot circulation pipeline and the inlet of the warm core; the other end of the second two-way valve is connected to the inlet of the cold core; the third two-way valve is arranged in series between the inlet of the cold core and the outlet of the warm core; one end of the fourth two-way valve is connected to the outlet of the warm core, and the other end is connected to one end of the sixth two-way valve and the hot circulation pipeline; one end of the fifth two-way valve is connected to the other end of the sixth two-way valve, and the other end of the fifth two-way valve is connected to the cold circulation pipeline.

2. The thermal management system according to claim 1, It is characterized in that Also included is a refrigeration assembly, the refrigeration assembly including a compressor, a condenser and a third heat exchanger; the condenser has a refrigerant passage and a coolant passage; the third heat exchanger has a refrigerant passage and a coolant passage; the refrigerant passages of the compressor, the condenser and the third heat exchanger are connected; The coolant passage of the condenser is connected to the first heat exchanger; The coolant passage of the third heat exchanger is connected to the second heat exchanger.

3. The thermal management system according to claim 2, It is characterized in that The refrigeration assembly also includes a liquid storage tank and an expansion valve; The liquid storage tank and the expansion valve are connected to the compressor, the refrigerant passage of the condenser, and the refrigerant passage of the third heat exchanger.

4. The thermal management system according to claim 2, It is characterized in that The second passage of the first heat exchanger is connected to the coolant passage of the condenser; The second passage of the second heat exchanger is connected to the coolant passage of the third heat exchanger.

5. The thermal management system according to claim 2, It is characterized in that The heat circulation pipeline is connected to the coolant passage of the condenser and can be selectively connected to or disconnected from the first heat exchanger; The cold circulation pipeline is connected to the coolant passage of the third heat exchanger and can be selectively connected to or disconnected from the second heat exchanger.

6. The thermal management system according to claim 5, It is characterized in that The passenger compartment heat exchange circuit can be selectively connected in series, in parallel, or disconnected with the cold circulation pipeline and the hot circulation pipeline respectively.

7. The thermal management system according to claim 6, It is characterized in that The heat circulation pipeline includes a first switching pipeline, a second switching pipeline, a third switching pipeline and a fourth switching pipeline; The fourth switching pipeline, the coolant passage of the condenser and the first switching pipeline are connected in series in sequence; the second switching pipeline and the passenger compartment heat exchange circuit are connected in parallel between the first switching pipeline and the third switching pipeline; The thermal circulation pipeline also includes a first three-way valve and a second three-way valve; The first valve port of the first three-way valve is connected to the first switching pipeline, the second valve port is connected to the passenger compartment heat exchange circuit, and the third valve port is connected to the second switching pipeline; The first valve port of the second three-way valve is connected to the third switching pipeline, the second valve port is connected to the second heat exchanger, and the third valve port is connected to the fourth switching pipeline.

8. The thermal management system according to claim 7, It is characterized in that The heat circulation pipeline also includes a first radiator and a first four-way valve; The first valve port of the first four-way valve is connected to the inlet of the first radiator, the second valve port is connected to the outlet of the first radiator, the third valve port is connected to the third switching pipeline, and the fourth valve port is connected to the second switching pipeline and the passenger compartment heat exchange circuit.

9. The thermal management system according to claim 6, It is characterized in that The cold circulation pipeline includes a fifth switching pipeline, a sixth switching pipeline, a seventh switching pipeline and an eighth switching pipeline; The eighth switching pipeline, the coolant passage of the third heat exchanger and the fifth switching pipeline are connected in series in sequence; the seventh switching pipeline and the first heat exchanger are connected in parallel between the sixth switching pipeline and the eighth switching pipeline; The cold circulation pipeline also includes a third three-way valve and a fourth three-way valve; The first valve port of the third three-way valve is connected to the coolant passage of the third heat exchanger, the second valve port is connected to the fifth switching pipeline, and the third valve port is connected to the passenger compartment heat exchange circuit; The first valve port of the fourth three-way valve is connected to the sixth switching pipeline, the second valve port is connected to the first heat exchanger, and the third valve port is connected to the seventh switching pipeline.

10. The thermal management system according to claim 6, It is characterized in that The cold core and the warm core can be selectively connected in series, in parallel or disconnected with the cold circulation pipeline and the hot circulation pipeline respectively.

11. The thermal management system according to any one of claims 5 to 10, It is characterized in that It also includes a second four-way valve, and the motor heat exchange circuit is provided with a motor electronic control system; The second four-way valve is connected to the motor heat exchange circuit and the cold circulation pipeline respectively.

12. The thermal management system according to claim 11, It is characterized in that The motor heat exchange circuit includes a second radiator, a fifth three-way valve, a first motor heat exchange pipeline, a second motor heat exchange pipeline and a third motor heat exchange pipeline; The first valve port of the second four-way valve is connected to one end of the first motor heat exchange pipeline, the second valve port is connected to one end of the third motor heat exchange pipeline, and the third valve port and the fourth valve port are connected to the cold circulation pipeline; The first valve port of the fifth three-way valve is connected to the outlet of the second radiator, the second valve port is connected to the other end of the first motor heat exchange pipeline, and the third valve port is connected to one end of the second motor heat exchange pipeline; The first valve port of the third four-way valve is connected to the other end of the second motor heat exchange pipeline, the second valve port is connected to the other end of the third motor heat exchange pipeline, and the third valve port and the fourth valve port are connected to the battery water circuit; The inlet of the second radiator is connected to the other end of the first motor heat exchange pipeline; The motor electronic control system is arranged on the first motor heat exchange pipeline.

13. A vehicle, It is characterized in that It comprises a thermal management system as claimed in any one of claims 1 to 12 and a controller electrically connected to the thermal management system, wherein the controller is used to control the thermal management system.

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