Automobile thermal management system and automobile

Abstract

The present application provides an automobile thermal management system and an automobile, the thermal management system comprising: a battery cooling branch, a motor cooling branch, a first straight branch and a five-way valve, a low-temperature radiator is connected in series in the motor cooling branch, the five-way valve has a first end, a second end, a third end, a fourth end and a fifth end, the first end is connected to the first input end of the battery cooling branch, the second end is connected to the first output end of the battery cooling branch, the third end is connected to the fourth input end of the first straight branch, the fourth end is connected to the second input end of the motor cooling branch, and the fifth end is connected to the second output end of the motor cooling branch; when the battery needs to be heated, the five-way valve is switched to the first state, the battery cooling branch and the motor cooling branch are connected, and the heat of the motor cooling branch is used to heat the battery, thereby reducing costs and energy consumption and improving vehicle endurance; at the same time, the five-way valve is used for connection to reduce the setting of branches, thereby simplifying the layout of the cabin and saving cabin space.

Description

Technical Field

[0001] The present disclosure generally relates to the field of thermal management technology, and more particularly to an automobile thermal management system and an automobile. Background Art

[0002] The automotive thermal management system is based on system integration, allowing the three media of coolant, refrigerant and air to effectively transfer heat between the motor, battery, passenger compartment and ambient air through heat exchangers, thereby increasing energy utilization and reducing energy consumption.

[0003] The power battery heating devices of existing pure electric vehicles are mostly high-voltage PTC heaters. The large number of heating devices, water pipes and valves makes the layout in the cabin complicated, consumes high costs and energy, and affects the vehicle's range. Summary of the invention

[0004] In view of the above defects or deficiencies in the prior art, it is desired to provide an automobile thermal management system and an automobile that can solve the above technical problems.

[0005] In a first aspect, the present application provides an automobile thermal management system, comprising: a battery cooling branch, a motor cooling branch, and a five-way valve for switching the connection state between the battery cooling branch and the motor cooling branch;

[0006] The battery cooling branch is used to provide a cooling medium for the battery; the battery cooling branch has a first output end and a first input end separated from each other;

[0007] The motor cooling branch is used to provide cooling medium for the motor, and the motor cooling branch has a second output end and a second input end separated from each other; a low-temperature radiator is connected in series in the motor cooling branch, and the low-temperature radiator has a third input end and a third output end, and the third input end is connected to the second input end;

[0008] a first direct branch, the first direct branch having a fourth input end and a fourth output end; the fourth output end is connected to the third output end;

[0009] The five-way valve has a first end, a second end, a third end, a fourth end and a fifth end, wherein the first end is connected to the first input end, the second end is connected to the first output end, the third end is connected to the fourth input end, the fourth end is connected to the second input end, and the fifth end is connected to the second output end;

[0010] The five-way valve has a first state and a second state; when in the first state, the first end and the fifth end are connected, the second end and the third end are connected, the fourth end is cut off, and the battery cooling branch and the motor cooling branch are connected; when in the second state, the first end and the second end are connected, the fourth end and the fifth end are connected, the third end is cut off, and the battery cooling branch and the motor cooling branch are not connected to each other.

[0011] According to the technical solution provided in the embodiment of the present application, the motor cooling branch includes a first water pump, a charger module, a first motor, a second water pump, and a second motor which are arranged in series in sequence, the output end of the second motor is connected to the fifth end, and the low-temperature radiator is arranged in series between the input end of the first water pump and the fourth end.

[0012] According to the technical solution provided in the embodiment of the present application, the battery cooling branch includes:

[0013] A cooler, the cooler having a fifth input end, a fifth output end, a sixth input end, and a sixth output end; the fifth output end is connected to the second end of the five-way valve;

[0014] A battery pack water cooling plate, wherein the input end of the battery pack water cooling plate is connected to the first end of the five-way valve, the output end of the battery pack water cooling plate is connected to a fourth water pump, and the output end of the fourth water pump is connected to the fifth input end.

[0015] According to the technical solution provided in the embodiment of the present application, the battery heat exchange branch and the heat dissipation branch, the battery heat exchange branch and the heat dissipation branch exchange heat through a condenser, and the condenser has a seventh input end, a seventh output end, an eighth input end, and an eighth output end;

[0016] The battery heat exchange branch includes: a compressor, a first coaxial tube, a second coaxial tube, a first electronic expansion valve and the cooler; the first coaxial tube has a ninth input end, a ninth output end, a tenth input end and a tenth output end; the second coaxial tube has an eleventh input end, an eleventh output end, a twelfth input end and a twelfth output end; the output end of the compressor is connected to the seventh input end, the seventh output end is connected to the ninth input end, the ninth output end is connected to the eleventh input end, the eleventh output end is connected to the first electronic expansion valve, the output end of the first electronic expansion valve is connected to the sixth input end of the cooler, the sixth output end of the cooler is connected to the twelfth input end, the twelfth output end is connected to the tenth input end, and the tenth output end is connected to the input end of the compressor;

[0017] The heat dissipation branch includes: a third water pump and the low-temperature radiator; the output end of the third water pump is connected to the eighth input end, the eighth output end is connected to the third input end, and the third output end is connected to the input end of the third water pump.

[0018] According to the technical solution provided in the embodiment of the present application, a first three-way valve is provided between the heat dissipation branch and the motor cooling branch, and the first three-way valve is used to switch the connection state between the low-temperature radiator and the heat dissipation branch and the motor cooling branch;

[0019] The first three-way valve has a sixth end, a seventh end and an eighth end, the sixth end is connected to the third output end of the low-temperature radiator, the seventh end is connected to the input end of the first water pump, and the eighth end is connected to the input end of the third water pump;

[0020] The first three-way valve has a third state and a fourth state. When in the third state, the sixth end is connected to the seventh end, and the low-temperature radiator is connected to the motor cooling branch; when in the fourth state, the sixth end is connected to the eighth end, and the low-temperature radiator is connected to the heat dissipation branch.

[0021] According to the technical solution provided in the embodiment of the present application, the eleventh output end of the second coaxial tube is further connected to a second electronic expansion valve, the output end of the second electronic expansion valve is connected to an evaporator, the output end of the evaporator is connected to the twelfth input end of the second coaxial tube, and the evaporator is used to cool the passenger compartment;

[0022] Wherein, a first refrigerant shut-off valve is provided between the evaporator and the compressor, and the first refrigerant shut-off valve is used to cut off the refrigerant between the evaporator and the compressor.

[0023] According to the technical solution provided in the embodiment of the present application, the passenger compartment heating branch and the passenger compartment heating heat exchange branch;

[0024] The passenger compartment heating branch circuit comprises:

[0025] A water heating core, wherein the input end of the water heating core is connected to the eighth output end, and the output end of the water heating core is connected to the input end of the third water pump;

[0026] The passenger compartment heating heat exchange branch includes: an external evaporative condenser and a thermal expansion valve, the input end of the thermal expansion valve is connected to the output end of the evaporator, the output end of the thermal expansion valve is connected to the input end of the external evaporative condenser, and the output end of the external evaporative condenser is connected to the tenth input end of the first coaxial tube.

[0027] According to the technical solution provided in the embodiment of the present application, a second three-way valve is provided between the heat dissipation branch and the passenger compartment heating branch, and the second three-way valve is used to switch the connection state between the heat dissipation branch and the passenger compartment heating branch;

[0028] The second three-way valve has a ninth end, a tenth end and an eleventh end, the ninth end is connected to the eighth output end, the tenth end is connected to the input end of the water heating core, and the eleventh end is connected to the third input end;

[0029] The second three-way valve has a fifth state and a sixth state. When in the fifth state, the ninth end is connected to the tenth end, and the passenger compartment heating branch is in a working state; when in the sixth state, the ninth end is connected to the eleventh end, and the heat dissipation branch is in a working state.

[0030] According to the technical solution provided in the embodiment of the present application, the defrost branch includes: a second refrigerant stop valve arranged in parallel with the thermal expansion valve; when the second refrigerant stop valve is opened, the compressor, condenser, evaporator, second refrigerant stop valve, and external evaporative condenser are connected in series in sequence to form the defrost branch.

[0031] A second aspect of the present application provides an automobile, comprising the thermal management system as described above.

[0032] The beneficial effects of this application are:

[0033] The present application provides an automobile thermal management system, which comprises: a battery cooling branch, a motor cooling branch, a first straight branch and a five-way valve for switching the connection state of the battery cooling branch and the motor cold zone branch, wherein the battery cooling branch has a first output end and a first input end separated from each other, and the motor cooling branch has a second output end and a second input end separated from each other; a low-temperature radiator is connected in series in the motor cooling branch, and the low-temperature radiator has a third input end and a third output end, and the third input end is connected to the second input end; the first straight branch has a fourth input end and a fourth output end, and the fourth output end is connected to the third output end; the five-way valve has a first end, a second end, a third end, a fourth end and a fifth end, wherein the first end is connected to the first input end, the second end is connected to the first output end, the third end is connected to the fourth input end, the fourth end is connected to the second input end, and the fifth end is connected to the second output end; the five-way valve has a first state and a second state;

[0034] Based on the above technical solution, when the battery needs to be heated, the five-way valve is switched to the first state. At this time, the first end and the fifth end are connected, the second end and the third end are connected, and the fourth end is cut off. The battery cooling branch and the motor cooling branch are connected, and the heat of the motor cooling branch is used to heat the battery, thereby reducing costs and energy consumption and improving vehicle endurance. At the same time, a five-way valve is used for connection to reduce the setting of branches, thereby simplifying the layout of the cabin and saving cabin space. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0036] Figure 1 It is an overall schematic diagram of an automotive thermal management system in this application;

[0037] Figure 2 is a schematic diagram of the battery heating mode in this application;

[0038] Figure 3 is a schematic diagram of the battery cooling mode in this application;

[0039] Figure 4 is a schematic diagram of the passenger compartment cooling mode in this application;

[0040] Figure 5 is a schematic diagram of the passenger compartment heating mode in this application;

[0041] Figure 6 It is the principle diagram of the defrost mode in this application;

[0042] Figure 7 is a schematic diagram of the motor cooling mode in this application;

[0043] In the figure: 1. first water pump; 2. charger module; 3. first motor; 4. second water pump; 5. second motor; 6. five-way valve; 7. battery pack cold water plate; 8. fourth water pump; 9. cooler; 10. compressor; 11. condenser; 12. third water pump; 13. second three-way valve; 14. water heating core; 15. first coaxial tube; 16. second coaxial tube; 17. second electronic expansion valve; 18. evaporator; 19. first electronic expansion valve; 20. first refrigerant stop valve; 21. thermal expansion valve; 22. second refrigerant stop valve; 23. external evaporative condenser; 24. low-temperature radiator; 25. first three-way valve; 26. high-pressure water heater; 27. motor kettle. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] Example 1

[0047] Please refer to Figure 1 A schematic diagram of an automobile thermal management system provided in the present application, comprising: a battery cooling branch, a motor cooling branch, and a five-way valve 6 for switching the connection state between the battery cooling branch and the motor cooling branch;

[0048] The battery cooling branch is used to provide a cooling medium for the battery; the battery cooling branch has a first output end and a first input end separated from each other;

[0049] The motor cooling branch is used to provide cooling medium for the motor, and the motor cooling branch has a second output end and a second input end separated from each other; a low-temperature radiator 24 is connected in series in the motor cooling branch, and the low-temperature radiator 24 has a third input end and a third output end, and the third input end is connected to the second input end;

[0050] a first direct branch, the first direct branch having a fourth input end and a fourth output end; the fourth output end is connected to the third output end;

[0051] The five-way valve 6 has a first end, a second end, a third end, a fourth end and a fifth end, wherein the first end is connected to the first input end, the second end is connected to the first output end, the third end is connected to the fourth input end, the fourth end is connected to the second input end, and the fifth end is connected to the second output end;

[0052] The five-way valve 6 has a first state and a second state; when in the first state, the first end and the fifth end are connected, the second end and the third end are connected, the fourth end is cut off, and the battery cooling branch and the motor cooling branch are connected; when in the second state, the first end and the second end are connected, the fourth end and the fifth end are connected, the third end is cut off, and the battery cooling branch and the motor cooling branch are not connected to each other.

[0053] Among them, a five-way valve 6 is used to switch the states of the motor cooling branch and the battery cooling branch. When the battery needs to be heated, the five-way valve 6 is switched to the first state. At this time, the first end and the fifth end are connected, the second end and the third end are connected, and the fourth end is cut off. The battery cooling branch and the motor cooling branch are connected, and the heat emitted by the motor in the motor cooling branch is used to heat the battery, thereby reducing costs and energy consumption and improving vehicle endurance. At the same time, the five-way valve 6 is used for connection to reduce the setting of branches, simplify the layout of the cabin, and save cabin space.

[0054] When the battery does not need to be heated, the five-way valve 6 is switched to the second state. At this time, the first end and the second end are connected, the fourth end and the fifth end are connected, and the third end is cut off. At this time, the battery cooling branch and the motor cooling branch are not connected to each other, and the heat dissipated by the motor is dissipated through the low-temperature radiator 24.

[0055] Specifically, Figure 1 As shown, in the figure, A is the first end; B is the second end; C is the third end; D is the fourth end; E is the fifth end;

[0056] In some embodiments, the motor cooling branch includes a first water pump 1, a charger module 2, a first motor 3, a second water pump 4, and a second motor 5 which are arranged in series in sequence, the output end of the second motor 5 is connected to the fifth end, and the low-temperature radiator 24 is arranged in series between the input end of the first water pump 1 and the fourth end.

[0057] Specifically, Figure 7 As shown, the working principle of the motor cooling branch is:

[0058] The first water pump 1 and the second water pump 4 are turned on. The first water pump 1 allows the coolant to flow rapidly in the motor cooling branch. The coolant cools the charger module 2, the first motor 3 and the second motor 5, and takes away the heat of the charger module 2, the first motor 3 and the second motor 5. At this time, the five-way valve 6 is switched to the second state, the first end and the second end are connected, the fourth end and the fifth end are connected, and the third end is cut off. The coolant dissipates the heat through the low-temperature radiator 24 and then returns to the first water pump 1 to continue circulating. Through the above process, the heat of the charging module 2, the first motor 3 and the second motor 5 is taken away by the coolant in the branch, and then the heat is dissipated through the low-temperature radiator 24 to achieve cooling of the motor branch.

[0059] In certain embodiments, the battery cooling branch includes:

[0060] A cooler 9, wherein the cooler 9 has a fifth input end, a fifth output end, a sixth input end, and a sixth output end; the fifth output end is connected to the second end of the five-way valve 6;

[0061] The battery pack water cooling plate 7 has an input end connected to the first end of the five-way valve 6, an output end of the battery pack water cooling plate 7 is connected to a fourth water pump 8, and an output end of the fourth water pump 8 is connected to the fifth input end.

[0062] Specifically, Figure 2 As shown, the working principle of the battery heating mode is:

[0063] The first water pump 1 and the second water pump 4 are turned on. The first water pump 1 allows the coolant to flow rapidly in the motor cooling branch. The coolant cools the charger module 2, the first motor 3 and the second motor 5, and takes away the heat of the charger module 2, the first motor 3 and the second motor 5. At this time, the five-way valve 6 is switched to the first state, the first end and the fifth end are connected, the second end and the third end are connected, and the fourth end is cut off. The heat of the motor is used to heat the battery pack water cooling plate 7. After the heating is completed, it passes through the cooler 9 and the five-way valve 6 and returns to the first water pump 1 from the fourth output end to continue circulation; through the above process, the battery cooling branch and the motor cooling branch are connected by the five-way valve 6, and the heat emitted by the motor in the motor cooling branch is used to heat the battery, thereby reducing costs and energy consumption and improving vehicle endurance; at the same time, the five-way valve 6 is used for connection to reduce the setting of branches, simplify the layout of the cabin, and save cabin space.

[0064] In some embodiments, the battery heat exchange branch and the heat dissipation branch, the battery heat exchange branch and the heat dissipation branch exchange heat through the condenser 11, and the condenser 11 has a seventh input end, a seventh output end, an eighth input end, and an eighth output end;

[0065] The battery heat exchange branch includes: a compressor 10, a first coaxial tube 15, a second coaxial tube 16, a first electronic expansion valve 19 and the cooler 9; the first coaxial tube 15 has a ninth input end, a ninth output end, a tenth input end and a tenth output end; the second coaxial tube 16 has an eleventh input end, an eleventh output end, a twelfth input end and a twelfth output end; the output end of the compressor 10 is connected to the seventh input end, the seventh output end is connected to the ninth input end, the ninth output end is connected to the eleventh input end, the eleventh output end is connected to the first electronic expansion valve 19, the output end of the first electronic expansion valve 19 is connected to the sixth input end of the cooler 9, the sixth output end of the cooler 9 is connected to the twelfth input end, the twelfth output end is connected to the tenth input end, and the tenth output end is connected to the input end of the compressor 10;

[0066] The heat dissipation branch includes: a third water pump 12 and the low-temperature radiator 24 ; the output end of the third water pump 12 is connected to the eighth input end, the eighth output end is connected to the third input end, and the third output end is connected to the input end of the third water pump 12 .

[0067] Specifically, the first coaxial tube 15 and the second coaxial tube 16 integrate the high-pressure and low-pressure tubes into one pipeline, while retaining their respective flow channels. The central axes of the two flow channels remain coaxial, ensuring that the refrigerant fully exchanges energy when circulating in the pipeline, thereby improving the refrigeration efficiency.

[0068] Specifically, Figure 3 As shown, the working principle of the battery cooling mode is:

[0069] The battery cooling branch, the battery heat exchange branch and the heat dissipation branch cooperate with each other to cool the battery;

[0070] First, the compressor 10 outputs high-temperature and high-pressure refrigerant, and at the same time, the third water pump 12 is started. The third water pump 12 allows the coolant to flow rapidly in the heat dissipation branch. The refrigerant and the coolant exchange heat through the condenser 11. At this time, the refrigerant passes through the first coaxial tube 15 and the second coaxial tube 16 to reach the first electronic expansion valve 19. The first electronic expansion valve 19 is used to reduce the pressure of the refrigerant and absorb heat, so that the refrigerant with low temperature and low pressure is output, and then it is input into the cooler 9 from the sixth input end. At this time, the fourth water pump 8 in the battery cooling branch allows the coolant to flow rapidly in the battery cooling branch, and then it is input into the cooler 9 from the fifth input end. The refrigerant flowing into the cooler 9 cools the coolant, and the cooled coolant cools the battery pack water cooling plate 7;

[0071] The coolant in the heat dissipation branch flows into the low-temperature radiator 24 after being output from the condenser 11 . After the low-temperature radiator 24 dissipates the heat of the coolant, it returns to the third water pump 12 through the third output end to continue circulating.

[0072] In some embodiments, a first three-way valve 25 is provided between the heat dissipation branch and the motor cooling branch, and the first three-way valve 25 is used to switch the connection state between the low-temperature radiator 24 and the heat dissipation branch and the motor cooling branch;

[0073] The first three-way valve 25 has a sixth end, a seventh end and an eighth end, the sixth end is connected to the third output end of the low-temperature radiator 24, the seventh end is connected to the input end of the first water pump 1, and the eighth end is connected to the input end of the third water pump 12;

[0074] The first three-way valve 25 has a third state and a fourth state. When in the third state, the sixth end is connected to the seventh end, and the low-temperature radiator 24 is connected to the motor cooling branch; when in the fourth state, the sixth end is connected to the eighth end, and the low-temperature radiator 24 is connected to the heat dissipation branch.

[0075] Specifically, Figure 1 As shown in the figure: F is the sixth end; G is the seventh end; H is the eighth end;

[0076] Specifically, the first three-way valve 25 is used to switch the connection state between the low-temperature radiator 24 and the heat dissipation branch and the motor cooling branch. When the motor cooling branch is running, the first three-way valve 25 is switched to the third state, and the sixth end is connected to the seventh end. At this time, the third output end of the low-temperature radiator 24 is connected to the input end of the first water pump 1. At this time, the low-temperature radiator 24 is used to dissipate heat for the coolant in the battery cooling branch, so that the coolant circulates in the battery cooling branch;

[0077] When the heat dissipation branch is in operation, the first three-way valve 25 is switched to the fourth state, and the sixth end is connected to the eighth end. At this time, the third output end of the low-temperature radiator 24 is connected to the input end of the third water pump 12. The low-temperature radiator 24 is used to dissipate heat for the coolant in the heat dissipation branch, so that the coolant circulates in the heat dissipation branch.

[0078] In some embodiments, the eleventh output end of the second coaxial tube 16 is further connected to a second electronic expansion valve 17, the output end of the second electronic expansion valve 17 is connected to an evaporator 18, the output end of the evaporator 18 is connected to the twelfth input end of the second coaxial tube 16, and the evaporator 18 is used to cool the passenger compartment;

[0079] A first refrigerant shut-off valve 20 is provided between the evaporator 18 and the compressor 10 , and the first refrigerant shut-off valve 20 is used to cut off the refrigerant between the evaporator 18 and the compressor 10 .

[0080] Specifically, Figure 4 As shown, the working principle of the passenger compartment cooling mode is:

[0081] The compressor 10 outputs high-temperature and high-pressure refrigerant. At this time, the first three-way valve 25 is switched to the fourth state, the heat dissipation branch is connected, the coolant flows rapidly in the heat dissipation branch, and the refrigerant and the coolant exchange heat through the condenser 11. At this time, the refrigerant passes through the first coaxial tube 15 and the second coaxial tube 16 to reach the second electronic expansion valve 17. The first electronic expansion valve 19 is used to reduce the pressure of the refrigerant and absorb heat, so that the low-temperature and low-pressure refrigerant is output to the evaporator 18. The evaporator 18 converts the refrigerant from liquefied to gasified, and the air conditioner of the passenger compartment outputs the cooled gas to the passenger compartment to cool the passenger compartment.

[0082] In certain embodiments, the passenger compartment heating branch and the passenger compartment heating heat exchange branch;

[0083] The passenger compartment heating branch circuit comprises:

[0084] A water heating core 14, wherein the input end of the water heating core 14 is connected to the eighth output end, and the output end of the water heating core 14 is connected to the input end of the third water pump 12;

[0085] The passenger compartment heating heat exchange branch includes: an external evaporative condenser 23 and a thermal expansion valve 21, the input end of the thermal expansion valve 21 is connected to the output end of the evaporator 18, the output end of the thermal expansion valve 21 is connected to the input end of the external evaporative condenser 23, and the output end of the external evaporative condenser 23 is connected to the tenth input end of the first coaxial tube 15.

[0086] Specifically, Figure 5 As shown, the working principle of the passenger compartment heating mode is:

[0087] The passenger compartment heating branch circuit cooperates with the passenger compartment heating heat exchange branch circuit to increase the temperature inside the passenger compartment;

[0088] The compressor 10 outputs high-temperature and high-pressure refrigerant, and at the same time starts the third water pump 12. The third water pump 12 allows the coolant to flow rapidly in the heat dissipation branch. The refrigerant and the coolant exchange heat through the condenser 11. The temperature of the coolant increases, and the coolant flows into the water heating core 14. A fan is provided next to the water heating core 14. The fan transfers the heat of the coolant in the water heating core 14 to the passenger compartment to heat the passenger compartment.

[0089] At the same time, the refrigerant passes through the first coaxial tube 15 and the second coaxial tube 16 to reach the second electronic expansion valve 17. The second electronic expansion valve 17 is used to reduce the pressure of the refrigerant and absorb heat, so as to output low-temperature and low-pressure refrigerant to the evaporator 18. The evaporator 18 converts the refrigerant from liquefaction to gasification. Subsequently, the gasified refrigerant passes through the thermal expansion valve 21 to heat up. After heating, it enters the external evaporative condenser 23 to convert the refrigerant from gasification to liquefaction, and is transported to the compressor 10 through the first coaxial tube 15 for circulation.

[0090] In some embodiments, the eighth output end of the condenser 11 is connected to the input end of the water heating system and is provided with a high-pressure water heater 26; when the temperature is lower than minus 15 degrees, the passenger compartment heating heat exchange branch does not work, and the coolant in the passenger compartment heating branch is heated by the high-pressure water heater 26, and the water heating core 14 transfers the heat to the passenger compartment to cool the passenger compartment.

[0091] In some embodiments, a second three-way valve 13 is provided between the heat dissipation branch and the passenger compartment heating branch, and the second three-way valve 13 is used to switch the connection state between the heat dissipation branch and the passenger compartment heating branch;

[0092] The second three-way valve 13 has a ninth end, a tenth end and an eleventh end, the ninth end is connected to the eighth output end, the tenth end is connected to the input end of the water heating core 14, and the eleventh end is connected to the third input end;

[0093] The second three-way valve 13 has a fifth state and a sixth state. When in the fifth state, the ninth end is connected to the tenth end, and the passenger compartment heating branch is in a working state; when in the sixth state, the ninth end is connected to the eleventh end, and the heat dissipation branch is in a working state.

[0094] Specifically, Figure 1 As shown in the figure: I is the ninth end; J is the tenth end; K is the eleventh end;

[0095] Specifically, the second three-way valve 13 is used to switch the connection state between the heat dissipation branch and the passenger compartment heating branch;

[0096] When the passenger compartment or the battery needs to be cooled, the heat dissipation branch is in operation, at which time the second three-way valve 13 is in the sixth state, the ninth end is connected to the eleventh end, and at this time, the eighth output end of the condenser 11 is connected to the third input end of the low-temperature radiator 24, and the heated coolant dissipates heat through the low-temperature radiator 24;

[0097] When the passenger compartment needs to be heated, the passenger compartment heating branch is operated. At this time, the second three-way valve 13 is in the fifth state, the ninth end is connected to the tenth end, the eighth output end of the condenser 11 is connected to the input end of the water heating core 14, and the heated coolant dissipates heat through the water heating core 14 to heat the passenger compartment.

[0098] In some embodiments, a defrost branch comprises: a second refrigerant stop valve 22 arranged in parallel with the thermal expansion valve 21; when the second refrigerant stop valve 22 is opened, the compressor 10, the condenser 11, the evaporator 18, the second refrigerant stop valve 22, and the external evaporative condenser 23 are connected in series in sequence to form the defrost branch.

[0099] Specifically, when the temperature reaches below zero, the surface of the external evaporative condenser 23 will frost, and the defrosting mode is used to defrost the external evaporative condenser 23; Figure 6 As shown in the figure, the working principle of the defrost mode is:

[0100] The compressor 10 outputs high-temperature and high-pressure refrigerant, which passes through the condenser 11, the first coaxial tube 15 and the second coaxial tube 16 to reach the second electronic expansion valve 17. The second electronic expansion valve 17 is used to reduce the pressure of the refrigerant and absorb heat, so as to output low-temperature and low-pressure refrigerant to the evaporator 18. The evaporator 18 converts the refrigerant from liquefaction to gasification. The refrigerant stop valve is opened, and the thermal expansion valve 21 is closed. The gasified refrigerant is transported to the external evaporative condenser 23 through the refrigerant stop valve to defrost the external evaporative condenser 23. The external evaporative condenser 23 converts the refrigerant from gasification to liquefaction, and transports it to the compressor 10 through the first coaxial tube 15 to circulate until defrosting is completed.

[0101] In some embodiments, the thermal management system also includes a motor kettle 27, which is connected to the motor cooling branch, the heat dissipation branch, and the passenger compartment heating branch through a one-way valve. The motor kettle 27 is used to add coolant to each branch of the thermal management system.

[0102] Example 2

[0103] The present application provides a car, comprising the thermal management system as described above.

[0104] Specifically, the thermal management system in this application can be applied to any vehicle driven by a motor, and this application does not make any specific restrictions on this.

[0105] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An automotive thermal management system, characterized in that: include: A battery cooling branch, a motor cooling branch, and a five-way valve (6) for switching the connection state between the battery cooling branch and the motor cooling branch; The battery cooling branch is used to provide a cooling medium for the battery; the battery cooling branch has a first output end and a first input end separated from each other; The motor cooling branch is used to provide a cooling medium for the motor, and the motor cooling branch has a second output end and a second input end that are separated from each other; a low-temperature radiator (24) is connected in series in the motor cooling branch, and the low-temperature radiator (24) has a third input end and a third output end, and the third input end is connected to the second input end; a first direct branch, the first direct branch having a fourth input end and a fourth output end; the fourth output end is connected to the third output end; The five-way valve (6) has a first end, a second end, a third end, a fourth end and a fifth end, the first end is connected to the first input end, the second end is connected to the first output end, the third end is connected to the fourth input end, the fourth end is connected to the second input end, and the fifth end is connected to the second output end; The five-way valve (6) has a first state and a second state; in the first state, the first end and the fifth end are connected, the second end and the third end are connected, the fourth end is cut off, and the battery cooling branch is connected with the motor cooling branch; in the second state, the first end and the second end are connected, the fourth end and the fifth end are connected, the third end is cut off, and the battery cooling branch and the motor cooling branch are not connected with each other; The battery heat exchange branch and the heat dissipation branch are further comprised. The battery heat exchange branch and the heat dissipation branch exchange heat via a condenser (11). The condenser (11) has a seventh input end, a seventh output end, an eighth input end, and an eighth output end. The battery heat exchange branch comprises a compressor (10), a first coaxial tube (15), a second coaxial tube (16), a first electronic expansion valve (19), and a cooler (9). The cooler (9) has a sixth input end and a sixth output end. The first coaxial tube (15) has a ninth input end, a ninth output end, a tenth input end, and a tenth output end. The second coaxial tube (16) has an eleventh input end, a ninth output end, a tenth input end, and a tenth output end. an input end, an eleventh output end, a twelfth input end, and a twelfth output end; the output end of the compressor (10) is connected to the seventh input end, the seventh output end is connected to the ninth input end, the ninth output end is connected to the eleventh input end, the eleventh output end is connected to the first electronic expansion valve (19), the output end of the first electronic expansion valve (19) is connected to the sixth input end of the cooler (9), the sixth output end of the cooler (9) is connected to the twelfth input end, the twelfth output end is connected to the tenth input end, and the tenth output end is connected to the input end of the compressor (10); The heat dissipation branch comprises: a third water pump (12) and the low-temperature radiator (24); the output end of the third water pump (12) is connected to the eighth input end, the eighth output end is connected to the third input end, and the third output end is connected to the input end of the third water pump (12).

2. The automotive thermal management system according to claim 1, characterized in that: The motor cooling branch comprises a first water pump (1), a charger module (2), a first motor (3), a second water pump (4), and a second motor (5) which are sequentially connected in series, the output end of the second motor (5) is connected to the fifth end, and the low-temperature radiator (24) is arranged in series between the input end of the first water pump (1) and the fourth end.

3. The automotive thermal management system according to claim 1, characterized in that: Also includes: The battery cooling branch comprises: The cooler (9), the cooler (9) further comprising a fifth input end and a fifth output end; The fifth output end is connected to the second end of the five-way valve (6); A battery pack water cooling plate (7), wherein an input end of the battery pack water cooling plate (7) is connected to the first end of the five-way valve (6), an output end of the battery pack water cooling plate (7) is connected to a fourth water pump (8), and an output end of the fourth water pump (8) is connected to the fifth input end.

4. The automotive thermal management system according to claim 2, characterized in that: Also includes: A first three-way valve (25) is provided between the heat dissipation branch and the motor cooling branch, the first three-way valve (25) being used to switch the connection state between the low-temperature radiator (24) and the heat dissipation branch and the motor cooling branch; The first three-way valve (25) has a sixth end, a seventh end and an eighth end, the sixth end is connected to the third output end of the low-temperature radiator (24), the seventh end is connected to the input end of the first water pump (1), and the eighth end is connected to the input end of the third water pump (12); The first three-way valve (25) has a third state and a fourth state. When in the third state, the sixth end is connected to the seventh end, and the low-temperature radiator (24) is connected to the motor cooling branch. When in the fourth state, the sixth end is connected to the eighth end, and the low-temperature radiator (24) is connected to the heat dissipation branch.

5. The automotive thermal management system according to claim 4, characterized in that: Also includes: The eleventh output end of the second coaxial tube (16) is also connected to a second electronic expansion valve (17), the output end of the second electronic expansion valve (17) is connected to an evaporator (18), the output end of the evaporator (18) is connected to the twelfth input end of the second coaxial tube (16), and the evaporator (18) is used to cool the passenger compartment; A first refrigerant shut-off valve (20) is provided between the evaporator (18) and the compressor (10), and the first refrigerant shut-off valve (20) is used to cut off the refrigerant between the evaporator (18) and the compressor (10).

6. The automotive thermal management system according to claim 5, characterized in that: Also includes: Passenger compartment heating branch and passenger compartment heating heat exchange branch; The passenger compartment heating branch circuit comprises: A water heating core (14), wherein the input end of the water heating core (14) is connected to the eighth output end, and the output end of the water heating core (14) is connected to the input end of the third water pump (12); The passenger compartment heating heat exchange branch comprises: an external evaporative condenser (23) and a thermal expansion valve (21); the input end of the thermal expansion valve (21) is connected to the output end of the evaporator (18); the output end of the thermal expansion valve (21) is connected to the input end of the external evaporative condenser (23); and the output end of the external evaporative condenser (23) is connected to the tenth input end of the first coaxial tube (15).

7. The automotive thermal management system according to claim 6, characterized in that: A second three-way valve (13) is provided between the heat dissipation branch and the passenger compartment heating branch, the second three-way valve (13) being used to switch the connection state between the heat dissipation branch and the passenger compartment heating branch; The second three-way valve (13) has a ninth end, a tenth end and an eleventh end, the ninth end is connected to the eighth output end, the tenth end is connected to the input end of the water heating core (14), and the eleventh end is connected to the third input end; The second three-way valve (13) has a fifth state and a sixth state. When in the fifth state, the ninth end is connected to the tenth end, and the passenger compartment heating branch is in a working state; when in the sixth state, the ninth end is connected to the eleventh end, and the heat dissipation branch is in a working state.

8. The automotive thermal management system according to claim 6, characterized in that: Also includes: A defrost branch, the defrost branch comprising: a second refrigerant stop valve (22) arranged in parallel with the thermal expansion valve (21); when the second refrigerant stop valve (22) is opened, the compressor (10), the condenser (11), the evaporator (18), the second refrigerant stop valve (22), and the external evaporative condenser (23) are connected in series in sequence to form the defrost branch.

9. A car, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 8.

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