Thermal management system and vehicle

Abstract

The utility model discloses a heat management system and a vehicle. The heat management system comprises a motor heat exchange loop, a battery heat exchange loop, an air conditioning system, a passenger compartment heat exchange system, a low-temperature heat dissipation loop and a heat exchanger. The air conditioning system comprises a compressor, a condenser and a heat exchanger which are connected in series. The condenser exchanges heat with the motor heat exchange loop or the passenger compartment heat exchange system, and the low-temperature heat dissipation loop exchanges heat with the motor heat exchange loop; the heat exchanger exchanges heat with a motor heat exchange loop or a passenger compartment heat exchange system; the battery heat exchange loop and the condenser are connected in series or in parallel, and the battery heat exchange loop and the heat exchanger are connected in series or in parallel. By means of the heat management system, the battery heat exchange loop can be cooled and heated only through direct cooling and direct heating of the refrigerant, no refrigerant flows in the passenger compartment heat exchange system, flames can be prevented from being blown into a passenger compartment when flames happen to inflammable refrigerants such as R290, and the safety of a vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a thermal management system and a vehicle. Background Art

[0002] The automobile air conditioning system absorbs or releases heat through the refrigerant cycle to adjust the temperature of the passenger compartment. Commonly used refrigerants include R134a, R1234yf and R290. Among them, R290 is an environmentally friendly refrigerant that will not damage the atmosphere, has no risk of greenhouse effect and ozone layer damage, and has higher cooling efficiency, which can reduce the energy consumption of the automobile air conditioning system and can replace R134a and R1234yf.

[0003] In the related art, the air conditioning core of the air conditioning box mainly includes an evaporator, a heater core or a condenser, etc., wherein refrigerants such as R134a and R1234yf can flow directly in the evaporator and the indoor condenser.

[0004] However, R290 is flammable, and attention should be paid to fire prevention, explosion prevention and other safety issues when using it. If R290 refrigerant is directly replaced in the evaporator and indoor condenser, when a fire occurs, the flame will be blown directly into the passenger compartment through the air-conditioning box, causing a safety accident. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a thermal management system that can realize direct cooling and direct heating of the battery heat exchange circuit only through refrigerant, and no refrigerant flows in the passenger compartment heat exchange system, thereby improving the safety of the vehicle.

[0006] According to the first aspect of the present utility model, the thermal management system includes: a motor heat exchange circuit, a battery heat exchange circuit, an air-conditioning system, a passenger compartment heat exchange system, a low-temperature heat dissipation circuit, and a heat exchanger; the air-conditioning system includes: a compressor, a condenser, and a heat exchanger, and the compressor, the condenser, and the heat exchanger are arranged in series with each other; the condenser exchanges heat with the motor heat exchange circuit or the passenger compartment heat exchange system, and the low-temperature heat dissipation circuit exchanges heat with the motor heat exchange circuit; the heat exchanger exchanges heat with the motor heat exchange circuit or the passenger compartment heat exchange system; the battery heat exchange circuit and the condenser are connected in series or in parallel, and the battery heat exchange circuit and the heat exchanger are connected in series or in parallel.

[0007] According to the embodiments of the utility model, through the above-mentioned thermal management system, the battery heat exchange circuit can be cooled and heated only by direct cooling and direct heating of the refrigerant, and there is no refrigerant flowing in the passenger compartment heat exchange system, which can prevent the flame from blowing into the passenger compartment when the refrigerant catches fire, thereby improving the safety of the vehicle.

[0008] According to some embodiments of the present utility model, the air conditioning system further includes: a first control valve and a second control valve, the first control valve being arranged between the condenser and the battery heat exchange circuit, and the second control valve being arranged between the first control valve and the heat exchanger.

[0009] According to some embodiments of the utility model, the battery heat exchange circuit includes: a battery pack, a first branch and a second branch, the battery pack is connected to the first branch and the second branch respectively, the first branch is connected between the battery pack and the air outlet of the compressor, one end of the second branch is arranged between the air outlet of the compressor and the battery pack, and the other end of the second branch is arranged between the heat exchanger and the air inlet of the compressor.

[0010] According to some embodiments of the present utility model, the battery heat exchange circuit includes: a third control valve and a fourth control valve, the third control valve is arranged in the first branch, and the fourth control valve is arranged in the second branch.

[0011] According to some embodiments of the present utility model, the battery heat exchange circuit further includes: a fifth control valve, and the fifth control valve is arranged between the battery pack and the condenser.

[0012] According to some embodiments of the present utility model, the passenger compartment heat exchange system includes: a first water pump and an air-conditioning core, the air-conditioning core and the first water pump are arranged in series, and the air-conditioning core and the condenser or the heat exchanger are arranged in series.

[0013] According to some embodiments of the utility model, the thermal management system also includes: a sixth control valve, a first end of the sixth control valve is connected to one end of the radiator, a second end of the sixth control valve is connected to the motor heat exchange circuit, and a third end of the sixth control valve is connected between the other end of the radiator and the second water pump.

[0014] According to some embodiments of the present utility model, the thermal management system also includes: a seventh control valve, which is respectively connected to the condenser, the heat exchanger, the motor heat exchange circuit and the passenger compartment heat exchange system; and the thermal management system also includes: an eighth control valve, which is respectively connected to the condenser, the heat exchanger, the motor heat exchange system and the second water pump.

[0015] According to some embodiments of the present invention, the thermal management system also includes: a second air-conditioning core, which is arranged between the eighth control valve and the second water pump; and / or, the thermal management system also includes: at least two heating cores, at least one of which is arranged in series with the passenger compartment heat exchange system, and at least another of which is arranged between the first water pump and the seventh control valve.

[0016] A vehicle according to an embodiment of the second aspect of the utility model includes: the thermal management system.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a simplified structural diagram of the thermal management system of the utility model;

[0020] Figure 2 This is the mode 1 of the embodiment 1 of the thermal management system of the utility model;

[0021] Figure 3 This is the second mode of the first embodiment of the thermal management system of the utility model;

[0022] Figure 4 This is the third mode of the first embodiment of the thermal management system of the present utility model;

[0023] Figure 5 It is an embodiment of mode 4 of embodiment 1 of the thermal management system of the utility model;

[0024] Figure 6 It is another embodiment of the mode 4 of the embodiment 1 of the thermal management system of the utility model;

[0025] Figure 7 This is the mode 5 of the first embodiment of the thermal management system of the present utility model;

[0026] Figure 8 This is the sixth mode of the first embodiment of the thermal management system of the present utility model;

[0027] Fig. 9 This is mode 7 of embodiment 1 of the thermal management system of the utility model;

[0028] Fig.10 This is mode eight of embodiment one of the thermal management system of the utility model;

[0029] Fig.11 This is mode nine of embodiment one of the thermal management system of the utility model;

[0030] Fig.12 This is the second embodiment of the thermal management system of the utility model;

[0031] Fig.13 This is the third embodiment of the thermal management system of the utility model;

[0032] Fig.14 This is the fourth embodiment of the thermal management system of the utility model;

[0033] Fig.15 This is the fifth embodiment of the thermal management system of the present utility model.

[0034] Reference numerals:

[0035] 100. Thermal management system;

[0036] 10. Motor heat exchange circuit; 11. Motor;

[0037] 20. Battery heat exchange circuit; 21. Battery pack; 22. First branch; 23. Second branch; 24. Third control valve; 25. Fourth control valve; 26. Fifth control valve;

[0038] 30. Air conditioning system; 31. Compressor; 32. Condenser; 33. Heat exchanger; 34. First control valve; 35. Second control valve; 36. Gas-liquid separator;

[0039] 40. Passenger compartment heat exchange system; 41. First water pump; 42. Air conditioning core; 43. Second air conditioning core; 44. Heating core;

[0040] 50. Low temperature heat dissipation circuit; 51. Radiator;

[0041] 60. Sixth control valve; 61. Seventh control valve; 62. Eighth control valve; 63. Second water pump; 64. Water circuit integrated module. DETAILED DESCRIPTION

[0042] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0043] Reference below Figure 1-Figure 15 The thermal management system 100 of the present invention is described, and the present invention also proposes a vehicle.

[0044] Reference Figure 1As shown, the thermal management system 100 of the embodiment of the utility model includes: a motor heat exchange circuit 10, a battery heat exchange circuit 20, an air conditioning system 30, a passenger compartment heat exchange system 40, a low-temperature heat dissipation circuit 50 and a heat exchanger 33.

[0045] The air conditioning system 30 includes: a compressor 31, a condenser 32 and a heat exchanger 33, which are arranged in series. The compressor 31 is used to compress the refrigerant, converting it into a high-temperature and high-pressure gas to be output from the air outlet of the compressor 31, the condenser 32 can condense the refrigerant flowing through it and release heat, and the heat exchanger 33 can evaporate the refrigerant flowing through it, and heat needs to be absorbed during the evaporation process. In addition, the air conditioning system 30 also includes a gas-liquid separator 36, which is connected in series with the compressor 31, and the gas-liquid separator 36 is used to separate the liquid refrigerant mixed in the refrigerant during the circulation, remove the moisture in the refrigerant, and prevent it from affecting the efficiency of the air conditioning system 30.

[0046] The refrigerant in the embodiment of the utility model is R290 refrigerant, and may also be flammable refrigerants such as R-32, R-152a and R-600a, and the condenser 32 may be a water-cooled condenser 32.

[0047] Furthermore, the condenser 32 exchanges heat with the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40. That is, the heat released by the condenser 32 condensing the refrigerant can be transferred to the coolant in the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40, and the coolant circulates to heat the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40.

[0048] In this way, there is no refrigerant flowing in the passenger compartment heat exchange system 40, which can prevent the flame from blowing into the passenger compartment when a fire occurs in the R290 refrigerant, thereby improving the safety of the vehicle.

[0049] Among them, the motor heat exchange circuit 10 includes: a motor 11 and high-voltage components. In an embodiment of the utility model, the motor 11 and the high-voltage components are connected in series, for example, a DC-DC, a charger 11, a distribution box, etc. The front and rear positions of the motor 11 and the high-voltage components can be replaced, or they can be connected in parallel.

[0050] The low temperature heat dissipation circuit 50 exchanges heat with the motor heat exchange circuit 10. Specifically, the low temperature heat dissipation circuit 50 includes: a radiator 51, which is connected in series with the motor 11. The radiator 51 can absorb heat from the external environment for use by the heat management system 100, and can cool the motor 11 and the air conditioning system 30 at the same time.

[0051] The heat exchanger 33 exchanges heat with the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40. The heat exchanger 33 needs to absorb the heat of the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40 to evaporate the refrigerant, and the coolant in the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40 becomes low-temperature coolant and continues to circulate.

[0052] The battery heat exchange loop 20 and the condenser 32 are connected in series or in parallel, and the battery heat exchange loop 20 and the heat exchanger 33 are connected in series or in parallel. In this way, the battery heat exchange loop 20 does not need to use a coolant, and can only be cooled and heated by direct cooling and direct heating of the refrigerant.

[0053] Therefore, through the above-mentioned thermal management system 100, the battery heat exchange circuit 20 can be directly cooled and heated only by the refrigerant, and there is no refrigerant flowing in the passenger compartment heat exchange system 40, which can prevent the flame from blowing into the passenger compartment when the refrigerant catches fire, thereby improving the safety of the vehicle.

[0054] The air conditioning system 30 further includes: a first control valve 34 and a second control valve 35, wherein the first control valve 34 is disposed between the condenser 32 and the battery heat exchange circuit 20, and the second control valve 35 is disposed between the first control valve 34 and the heat exchanger 33. The first control valve 34 and the second control valve 35 may be electronic expansion valves, and the types of electronic expansion valves are not limited, and may be electromagnetic electronic expansion valves, electric electronic expansion valves, etc. The first control valve 34 has a complete shutoff function, a complete conduction non-expansion function, and a normal throttling expansion function, and the second control valve 35 has a complete shutoff function and a normal throttling expansion function.

[0055] The battery heat exchange circuit 20 includes: a battery pack 21, a first branch 22 and a second branch 23. The battery pack 21 is connected to the first branch 22 and the second branch 23 respectively. The first branch 22 is connected between the battery pack 21 and the air outlet of the compressor 31. One end of the second branch 23 is arranged between the air outlet of the compressor 31 and the battery pack 21, and the other end of the second branch 23 is arranged between the heat exchanger 33 and the air inlet of the compressor 31.

[0056] The battery heat exchange loop 20 further includes: a third control valve 24 and a fourth control valve 25, wherein the third control valve 24 is arranged in the first branch 22, and the fourth control valve 25 is arranged in the second branch 23. The third control valve 24 and the fourth control valve 25 may be stop valves, and the types of the stop valves are not limited, and may be straight-through stop valves, angle-through stop valves, etc.

[0057] Reference Fig.12As shown, the battery heat exchange loop 20 further includes: a fifth control valve 26, which is disposed between the battery pack 21 and the condenser 32. The fifth control valve 26 may be an electronic expansion valve, which has the same function as the first control valve 34. In some embodiments, the fifth control valve 26 may be added and a stop valve may be used to replace the first control valve 34. The fifth control valve 26 is closer to the battery pack 21, which may improve the control accuracy of the cooling capacity of the battery pack 21.

[0058] The passenger compartment heat exchange system 40 includes: a first water pump 41 and an air conditioning core 42. The air conditioning core 42 and the first water pump 41 are arranged in series, and the air conditioning core 42 and the condenser 32 or the heat exchanger 33 are arranged in series. The air conditioning core 42 is located in the air conditioning box, corresponding to the position of the passenger compartment. The air conditioning box is also provided with an air heating PTC. The air conditioning core 42 heats or cools the air in the air conditioning box, so as to achieve heating or cooling of the passenger compartment. Among them, the position of the first water pump 41 can be adjusted.

[0059] The thermal management system 100 further includes: a sixth control valve 60, a first end of the sixth control valve 60 is connected to one end of the radiator 51, a second end of the sixth control valve 60 is connected to the motor heat exchange circuit 10, and a third end of the sixth control valve 60 is connected between the other end of the radiator 51 and the second water pump 63. The sixth control valve 60 may be a three-way valve, the type of the three-way valve is not limited, and the position of the second water pump 63 may also be adjusted.

[0060] The thermal management system 100 further includes: a seventh control valve 61, which is respectively connected to the condenser 32, the heat exchanger 33, the motor heat exchange circuit 10, and the passenger compartment heat exchange system 40. The seventh control valve 61 can control the air conditioning system 30 to be connected to the motor heat exchange circuit 10 or the passenger compartment heat exchange system 40, wherein the seventh control valve 61 can be a four-way valve, the type of the four-way valve is not limited, and can be a spherical four-way valve, a butterfly four-way valve, etc.

[0061] Furthermore, the thermal management system 100 further includes an eighth control valve 62, which is respectively connected to the condenser 32, the heat exchanger 33, the passenger compartment heat exchange system 40, and the second water pump 63. The eighth control valve 62 can control the heat exchanger 33 to be connected to the passenger compartment heat exchange system 40 or the motor heat exchange circuit 10, wherein the eighth control valve 62 can be a four-way valve, the type of which is not limited, and can be a spherical four-way valve, a butterfly four-way valve, etc.

[0062] And, refer to Fig.15 As shown, the sixth control valve 60, the seventh control valve 61 and the eighth control valve 62 can also be integrated into a water channel integrated module 64, which can improve manufacturing efficiency and reduce costs.

[0063] Reference Fig.13As shown, the thermal management system 100 further includes: a second air conditioning core 43, which is disposed between the eighth control valve 62 and the second water pump 63. In some embodiments, the air-heating PTC in the air conditioning box can be replaced by the second air conditioning core 43.

[0064] And, refer to Fig.14 As shown, in some embodiments, the thermal management system 100 further includes: at least two heating cores 44, at least one heating core 44 and the passenger compartment heat exchange system 40 are arranged in series, and at least another heating core 44 is arranged between the first water pump 41 and the seventh control valve 41. The heating core 44 can be a water heating PTC.

[0065] Refer to the following Figure 2 Describe the working mode 1 of the thermal management system 100:

[0066] Working mode one can achieve dual cooling of the passenger compartment and the battery pack 21 under high temperature environment. The first control valve 34, the second control valve 35 and the fourth control valve 25 are opened, the third control valve 24 is closed, the first end and the second end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the motor heat exchange circuit 10, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the passenger compartment heat exchange system 40.

[0067] The compressor 31 produces high-temperature and high-pressure refrigerant at its air outlet, which releases heat to the motor heat exchange circuit 10 through the condenser 32. After the refrigerant expands through the first control valve 34, it flows into the battery pack 21 and the heat exchanger 33 as needed to evaporate and absorb heat, thereby realizing the refrigeration function of the battery pack 21. After absorbing heat, the refrigerant returns to the compressor 31 through the gas-liquid separator 36.

[0068] After the coolant in the motor heat exchange circuit 10 absorbs heat and flows out from the condenser 32, it flows into high-voltage components such as DC-DC and the motor 11 in turn to cool them respectively. The high-temperature coolant then flows into the radiator 51 to dissipate heat with the help of cold air circulation. The generated low-temperature coolant flows back to the condenser 32 to cool the air-conditioning system 30 again.

[0069] After the coolant of the passenger compartment heat exchange system 40 absorbs heat in the heat exchanger 33, it forms low-temperature coolant and flows out. The low-temperature coolant cools the circulating air in the air-conditioning box through the air-conditioning core 42 and blows it out, thereby realizing the passenger compartment cooling function.

[0070] Refer to the following Figure 3 Describe the working mode 2 of the thermal management system 100:

[0071] Working mode two can realize cooling of the battery pack 21 in a high temperature environment. The first control valve 34 and the fourth control valve 25 are opened, the second control valve 35 and the third control valve 24 are closed, the first end and the second end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the motor heat exchange circuit 10, and the eighth control valve 62 controls the connection between the second water pump 63 and the condenser 32.

[0072] The compressor 31 produces high-temperature and high-pressure refrigerant at its air outlet, which releases heat to the motor heat exchange circuit 10 through the condenser 32. After the refrigerant expands through the first control valve 34, it flows into the battery pack 21 to evaporate and absorb heat, thereby realizing the refrigeration function of the battery pack 21. After absorbing heat, the refrigerant returns to the compressor 31 through the gas-liquid separator 36.

[0073] After the coolant in the motor heat exchange circuit 10 absorbs heat and flows out from the condenser 32, it flows into high-voltage components such as DC-DC and the motor 11 in turn to cool them respectively. The high-temperature coolant then flows into the radiator 51 to dissipate heat with the help of cold air circulation. The generated low-temperature coolant flows back to the condenser 32 to cool the air-conditioning system 30 again.

[0074] Refer to the following Figure 4 Describe the working mode 3 of the thermal management system 100:

[0075] Working mode three can realize cooling of the passenger compartment in a high temperature environment. The first control valve 34 and the second control valve 35 are opened, the third control valve 24 and the fourth control valve 25 are closed, the first end and the second end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the motor heat exchange circuit 10, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the passenger compartment heat exchange system 40.

[0076] The compressor 31 produces high-temperature and high-pressure refrigerant at its outlet, which releases heat to the motor heat exchange circuit 10 through the condenser 32. After the refrigerant expands through the first control valve 34, it flows into the heat exchanger 33 through the second control valve 35 to evaporate and absorb heat. After the refrigerant absorbs heat, it returns to the compressor 31 through the gas-liquid separator 36.

[0077] After the coolant in the motor heat exchange circuit 10 absorbs heat and flows out from the condenser 32, it flows into high-voltage components such as DC-DC and the motor 11 in turn to cool them respectively. The high-temperature coolant then flows into the radiator 51 to dissipate heat with the help of cold air circulation. The generated low-temperature coolant flows back to the condenser 32 to cool the air-conditioning system 30 again.

[0078] After the coolant of the passenger compartment heat exchange system 40 absorbs heat in the heat exchanger 33, it forms low-temperature coolant and flows out. The low-temperature coolant cools the circulating air in the air-conditioning box through the air-conditioning core 42 and blows it out, thereby realizing the passenger compartment cooling function.

[0079] Refer to the following Figure 5 Describe the working mode 4 of the thermal management system 100:

[0080] Working mode four can achieve dual heating of the passenger compartment and the battery pack 21 in a low temperature environment. The first control valve 34, the second control valve 35 and the third control valve 24 are opened, the fourth control valve 25 is closed, the second end and the third end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the passenger compartment heat exchange system 40, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the second water pump 63.

[0081] The compressor 31 produces high-temperature and high-pressure refrigerant at the air outlet. A part of the refrigerant enters the battery pack 21 for condensation and heat release to meet the heating requirements of the battery pack 21. The other part of the refrigerant releases heat to the passenger compartment heat exchange system 40 through the condenser 32. The opening of the first control valve 34 is adjusted to the maximum. The refrigerant expands in the first control valve 34 and flows into the second control valve 35 after merging with the outlet of the battery pack 21. After expanding through the second control valve 35, the refrigerant enters the heat exchanger 33 for evaporation and heat absorption, and then returns to the compressor 31 through the gas-liquid separator 36.

[0082] The coolant of the passenger compartment heat exchange system 40 absorbs heat from the condenser 32 and becomes high-temperature coolant. The high-temperature coolant heats the circulating air in the air-conditioning box through the air-conditioning core 42 and blows it out, thereby realizing the passenger compartment heating function.

[0083] The coolant in the motor heat exchange circuit 10 absorbs heat from the heat exchanger 33 and becomes low temperature and flows out, flowing into high-voltage components such as DC-DC and the motor 11 to absorb waste heat generated during driving and charging. After the coolant temperature rises, it flows back to the heat exchanger 33 again to be absorbed and utilized by the air-conditioning system 30.

[0084] And, refer to Figure 6 As shown, in some cases, the temperature of the coolant after flowing through the motor 11 is still lower than the ambient temperature and cannot be supplied to the air-conditioning system 30 for absorption and utilization. At this time, the first end and the second end of the sixth control valve 60 are connected, so that the motor heat exchange circuit 10 and the low-temperature heat dissipation circuit 50 are connected, and the radiator 51 is used to exchange heat with the external environment to heat the coolant with an excessively low temperature and supply it to the air-conditioning system 30 for absorption and utilization.

[0085] Refer to the following Figure 7 Describe the working mode 5 of the thermal management system 100:

[0086] Working mode five can realize heating of the battery pack 21 in a low temperature environment. The second control valve 35 and the third control valve 24 are opened, the first control valve 34 and the fourth control valve 25 are closed, the second end and the third end of the sixth control valve 60 are connected, the seventh control valve 61 controls the heat exchanger 33 and the motor heat exchange circuit 10 to be connected, and the eighth control valve 62 controls the heat exchanger 33 and the second water pump 63 to be connected.

[0087] The compressor 31 produces high-temperature and high-pressure refrigerant at its air outlet. The refrigerant enters the battery pack 21 to condense and release heat, thereby meeting the heating requirement of the battery pack 21 . After expanding through the second control valve 35 , the refrigerant enters the heat exchanger 33 to evaporate and absorb heat, and then returns to the compressor 31 through the gas-liquid separator 36 .

[0088] The coolant in the motor heat exchange circuit 10 absorbs heat from the heat exchanger 33 and becomes low temperature and flows out, flowing into high-voltage components such as DC-DC and the motor 11 to absorb waste heat generated during driving and charging. After the coolant temperature rises, it flows back to the heat exchanger 33 again to be absorbed and utilized by the air-conditioning system 30.

[0089] Refer to the following Figure 8 Describe the working mode 6 of the thermal management system 100:

[0090] Working mode six can achieve heating of the passenger compartment in a low temperature environment. The first control valve 34 and the second control valve 35 are opened, the third control valve 24 and the fourth control valve 25 are closed, the second end and the third end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the passenger compartment heat exchange system 40, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the second water pump 63.

[0091] The compressor 31 produces high-temperature and high-pressure refrigerant at its air outlet. The refrigerant releases heat to the passenger compartment heat exchange system 40 through the condenser 32. The opening of the first control valve 34 is adjusted to the maximum. The refrigerant expands in the first control valve 34 and flows into the second control valve 35. The refrigerant expands through the second control valve 35 and enters the heat exchanger 33 for evaporation and heat absorption, and then returns to the compressor 31 through the gas-liquid separator 36.

[0092] The coolant of the passenger compartment heat exchange system 40 absorbs heat from the condenser 32 and becomes high-temperature coolant. The high-temperature coolant heats the circulating air in the air-conditioning box through the air-conditioning core 42 and blows it out, thereby realizing the passenger compartment heating function.

[0093] The coolant in the motor heat exchange circuit 10 absorbs heat from the heat exchanger 33 and becomes low temperature and flows out, flowing into high-voltage components such as DC-DC and the motor 11 to absorb waste heat generated during driving and charging. After the coolant temperature rises, it flows back to the heat exchanger 33 again to be absorbed and utilized by the air-conditioning system 30.

[0094] Refer to the following Fig. 9 Describe the working mode 7 of the thermal management system 100:

[0095] Working mode seven can achieve heating of the passenger compartment and cooling of the battery pack 21. The first control valve 34, the second control valve 35 and the fourth control valve 25 are opened, the third control valve 24 is closed, the second end and the third end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the passenger compartment heat exchange system 40, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the second water pump 63.

[0096] The compressor 31 produces high-temperature and high-pressure refrigerant at the air outlet. The refrigerant releases heat to the passenger compartment heat exchange system 40 through the condenser 32, and then expands through the first control valve 34. It flows into the battery pack 21 and the heat exchanger 33 as needed to evaporate and absorb heat. Evaporation and heat absorption in the battery pack 21 can cool the battery pack 21, and evaporation in the heat exchanger 33 can absorb heat from the motor 11. Alternatively, refer to mode four to adjust the first and second ends of the sixth control valve 60 to be connected, and use the radiator 51 to absorb ambient heat. After absorbing heat, it returns to the compressor 31 through the gas-liquid separator 36.

[0097] The coolant of the passenger compartment heat exchange system 40 absorbs heat from the condenser 32 and becomes high-temperature coolant. The high-temperature coolant heats the circulating air in the air-conditioning box through the air-conditioning core 42 and blows it out, thereby realizing the passenger compartment heating function.

[0098] The coolant in the motor heat exchange circuit 10 absorbs heat from the heat exchanger 33 and becomes low temperature and flows out, flowing into high-voltage components such as DC-DC and the motor 11 to absorb waste heat generated during driving and charging. After the coolant temperature rises, it flows back to the heat exchanger 33 again to be absorbed and utilized by the air-conditioning system 30.

[0099] Refer to the following Fig.10 Describe the working mode eight of the thermal management system 100:

[0100] Working mode eight can achieve heating of the passenger compartment only by cooling the heat of the battery pack 21. The first control valve 34 and the fourth control valve 25 are opened, the second control valve 35 and the third control valve 24 are closed, the second end and the third end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the passenger compartment heat exchange system 40, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the second water pump 63.

[0101] The compressor 31 produces high-temperature and high-pressure refrigerant at the air outlet. The refrigerant releases heat to the passenger compartment heat exchange system 40 through the condenser 32, then expands through the first control valve 34, flows into the battery pack 21 to evaporate and absorb heat. The evaporation and heat absorption in the battery pack 21 can achieve cooling of the battery pack 21. After absorbing heat, the refrigerant returns to the compressor 31 through the gas-liquid separator 36.

[0102] The coolant of the passenger compartment heat exchange system 40 absorbs heat from the condenser 32 and becomes high-temperature coolant. The high-temperature coolant heats the circulating air in the air-conditioning box through the air-conditioning core 42 and blows it out, thereby realizing the passenger compartment heating function.

[0103] The coolant in the motor heat exchange circuit 10 absorbs heat in the heat exchanger 33 and becomes low temperature and flows out, flows into high-voltage components such as DC-DC and the motor 11 to absorb waste heat generated during driving and charging, and recirculates into the heat exchanger 33.

[0104] Refer to the following Fig.11 Describe the working mode nine of the thermal management system 100:

[0105] Working mode nine can realize heating of the battery pack 21 and defoggering of the passenger compartment. The second control valve 35 and the fourth control valve 25 are opened, the first control valve 34 and the third control valve 24 are closed, the first end and the second end of the sixth control valve 60 are connected, the seventh control valve 61 controls the connection between the condenser 32 and the motor heat exchange circuit 10, and the eighth control valve 62 controls the connection between the heat exchanger 33 and the passenger compartment heat exchange system 40.

[0106] The compressor 31 produces high-temperature and high-pressure refrigerant at its air outlet. The refrigerant enters the battery pack 21 to condense and release heat, thereby meeting the heating requirement of the battery pack 21 . After expanding through the second control valve 35 , the refrigerant enters the heat exchanger 33 to evaporate and absorb heat, and then returns to the compressor 31 through the gas-liquid separator 36 .

[0107] After the coolant of the passenger compartment heat exchange system 40 absorbs heat in the heat exchanger 33, it forms low-temperature coolant and flows out, condenses water vapor in the air in the air-conditioning box through the air-conditioning core 42 to form dry low-temperature air, and then is heated by the air-heating PTC to become dry air at normal temperature, which is blown to the front windshield to realize the defog function.

[0108] In addition, if there is no need to heat the battery pack 21, but the passenger compartment still needs to be defogged, working mode 1, working mode 2 and working mode 3 or other modes with passenger compartment cooling function can be used, and the air heating PTC can be turned on (not turned on in summer) to prevent the air outlet temperature from being too low.

[0109] Reference Fig.13 As shown, in some embodiments, the air-heating PTC in the air-conditioning box can be replaced by a second air-conditioning core 43, and the second air-conditioning core 43 is connected between the second water pump 63 and the eighth control valve 62. When the passenger compartment defog function is turned on, the high-temperature coolant released from the condenser 32 can be redirected to the air-conditioning box to perform secondary heating on the dry cold air, which is more energy-saving than using the air-heating PTC.

[0110] However, in extremely low temperature environments, the air conditioning system 30 does not have other air heating PTCs to provide more heating, which affects the heating effect. Fig.14 As shown, in some embodiments, a heating core 44 may be added in series with the passenger compartment heat exchange system 40, or a heating core 44 may be added between the first water pump 41 and the seventh control valve 61 to improve the heating performance at extremely low temperatures.

[0111] A vehicle according to an embodiment of the second aspect of the utility model includes: a thermal management system 100 .

[0112] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0113] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0114] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A thermal management system, characterized in that: include: Motor heat exchange circuit, battery heat exchange circuit, air conditioning system, passenger compartment heat exchange system, low-temperature heat dissipation circuit, heat exchanger; The air conditioning system comprises: a compressor, a condenser and a heat exchanger, wherein the compressor, the condenser and the heat exchanger are arranged in series with each other; The condenser exchanges heat with the motor heat exchange circuit or the passenger compartment heat exchange system, and the low-temperature heat dissipation circuit exchanges heat with the motor heat exchange circuit; The heat exchanger exchanges heat with the motor heat exchange circuit or the passenger compartment heat exchange system; The battery heat exchange circuit and the condenser are connected in series or in parallel, and the battery heat exchange circuit and the heat exchanger are connected in series or in parallel.

2. The thermal management system according to claim 1, characterized in that: The air conditioning system further includes: a first control valve and a second control valve, wherein the first control valve is disposed between the condenser and the battery heat exchange circuit, and the second control valve is disposed between the first control valve and the heat exchanger.

3. The thermal management system according to claim 2, characterized in that: The battery heat exchange circuit includes: a battery pack, a first branch and a second branch, the battery pack is connected to the first branch and the second branch respectively, the first branch is connected between the battery pack and the air outlet of the compressor, one end of the second branch is arranged between the air outlet of the compressor and the battery pack, and the other end of the second branch is arranged between the heat exchanger and the air inlet of the compressor.

4. The thermal management system according to claim 3, characterized in that: The battery heat exchange circuit includes: a third control valve and a fourth control valve, the third control valve is arranged on the first branch, and the fourth control valve is arranged on the second branch.

5. The thermal management system according to claim 3, characterized in that: The battery heat exchange circuit also includes: a fifth control valve, and the fifth control valve is arranged between the battery pack and the condenser.

6. The thermal management system according to claim 1, characterized in that: The passenger compartment heat exchange system includes: a first water pump and an air conditioning core, wherein the air conditioning core and the first water pump are arranged in series, and the air conditioning core and the condenser or the heat exchanger are arranged in series.

7. The thermal management system according to claim 6, characterized in that: Also includes: A sixth control valve, wherein a first end of the sixth control valve is connected to one end of the radiator, a second end of the sixth control valve is connected to the motor heat exchange circuit, and a third end of the sixth control valve is connected between the other end of the radiator and the second water pump.

8. The thermal management system according to claim 7, characterized in that: Also includes: a seventh control valve, the seventh control valve being in communication with the condenser, the heat exchanger, the motor heat exchange circuit and the passenger compartment heat exchange system respectively; as well as, The thermal management system further includes an eighth control valve, which is respectively connected to the condenser, the heat exchanger, the passenger compartment heat exchange system and the second water pump.

9. The thermal management system according to claim 8, characterized in that: Also includes: a second air conditioning core, the second air conditioning core being disposed between the eighth control valve and the second water pump; and / or, The thermal management system further includes: at least two heating cores, at least one of the heating cores is arranged in series with the passenger compartment heat exchange system, and at least another of the heating cores is arranged between the first water pump and the seventh control valve.

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

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