Whole vehicle thermal management system and vehicle

Abstract

The utility model discloses a whole vehicle thermal management system which comprises an HVAC assembly and a battery cooling loop, the battery cooling loop comprises a battery cooler, and the battery cooling loop is connected with the HVAC assembly. The whole vehicle thermal management system has the functions of heating and cooling the passenger compartment and heating, cooling and temperature equalizing the power battery, and can meet the requirements of heating the passenger compartment and the power battery at the same time. The utility model further discloses a vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and specifically relates to a whole vehicle thermal management system and a vehicle. Background Art

[0002] The passenger compartment of new energy vehicles needs to be cooled and heated, and the power battery also needs to be cooled and heated. The existing vehicle thermal management system cannot meet the heating needs of the passenger compartment and the battery at the same time due to design defects.

[0003] For example, a patent document with authorization announcement number CN219191860U discloses an integrated thermal management system based on a heat pump, which is characterized by comprising a heat pump unit, a battery thermal management circuit, a passenger compartment thermal management circuit, a motor cooling circuit, and a hydraulic system cooling circuit. The heat pump unit exchanges heat with the battery thermal management circuit, the passenger compartment thermal management circuit, and the motor cooling circuit through the heat exchange units on the refrigeration circuit and the heating circuit. The passenger compartment thermal management circuit and the battery thermal management circuit are also connected through an electromagnetic three-way valve. The hydraulic system cooling circuit and the heat pump unit share a heat dissipation unit. The technical solution disclosed in this patent document also cannot solve the technical problems recorded above.

[0004] Therefore, there is an urgent need to improve the thermal management system of existing new energy vehicles to solve the technical problems existing in the prior art. 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 provides a vehicle thermal management system, the purpose of which is to ensure that the requirements for heating the passenger compartment and the power battery can be met at the same time.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a vehicle thermal management system, including an HVAC assembly and a battery cooling circuit, the battery cooling circuit includes a battery cooler, and the battery cooling circuit is connected to the HVAC assembly.

[0007] The HVAC assembly includes an indoor heat exchanger, a blower, and a warm air heater, and the warm air heater is connected to the battery cooling circuit.

[0008] The battery cooling circuit also includes a WPTC heater, a battery water pump and a first water valve. The WPTC heater is located between the battery water pump and the first water valve and is connected to the battery water pump and the first water valve. The battery water pump is connected to the battery cooler. The first water valve is connected to the battery pack and the warm air heater. The warm air heater is connected to the battery pack.

[0009] The vehicle thermal management system further includes an outdoor condenser, which is connected to a first solenoid valve, which is connected to a second solenoid valve, and which is connected to the indoor heat exchanger.

[0010] The battery cooler is connected to a third solenoid valve, the third solenoid valve is connected to a fourth solenoid valve, and the fourth solenoid valve is connected to the outdoor condenser.

[0011] The third solenoid valve is connected to a gas-liquid separator, the gas-liquid separator is connected to an electric compressor, and the electric compressor is connected to the second solenoid valve.

[0012] The outdoor condenser is connected to a first electronic expansion valve, the first electronic expansion valve is connected to the indoor heat exchanger, the indoor heat exchanger is connected to a fifth solenoid valve, the fifth solenoid valve is connected to a second electronic expansion valve, and the second electronic expansion valve is connected to the battery cooler.

[0013] The utility model also provides a vehicle, comprising the whole vehicle thermal management system.

[0014] The vehicle thermal management system of the utility model has the functions of heating and cooling the passenger compartment, heating, cooling and equalizing the temperature of the power battery, and can meet the heating needs of the passenger compartment and the power battery at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the thermal management system of the utility model for the whole vehicle;

[0016] Figure 2 This is a schematic diagram of the direction of liquid flow when the cab air conditioner is cooling down;

[0017] Figure 3 This is a schematic diagram of the direction of liquid flow when the battery is cooled;

[0018] Figure 4 This is a schematic diagram of the liquid flow when the battery is at an even temperature;

[0019] Figure 5 This is a schematic diagram of the flow of liquids when the passenger compartment is cooled and the battery is cooled;

[0020] Figure 6 This is a schematic diagram of the flow of liquid when the passenger compartment is heated;

[0021] Figure 7 This is a schematic diagram of the liquid flow when heating the passenger compartment and supplementing heat on the battery side;

[0022] Figure 8 This is a schematic diagram of the liquid flow when the passenger compartment heat pump is heating and the WPTC is supplementing heat;

[0023] Fig. 9 This is a schematic diagram of the liquid flow direction in the outdoor condenser defrosting mode;

[0024] Fig.10 This is a schematic diagram of the liquid flow direction in the second defrosting mode of the outdoor condenser;

[0025] Fig.11 This is a schematic diagram of the direction of liquid flow when the battery is heated;

[0026] Fig.12 This is a schematic diagram of the fluid flow during cockpit heating and battery heating;

[0027] The markings in the above figures are: 1. Battery cooler; 2. HVAC assembly; 3. Indoor heat exchanger; 4. Blower; 5. Warm air heater; 6. WPTC heater; 7. Battery water pump; 8. First water valve; 9. Second water valve; 10. Battery pack; 11. Outdoor condenser; 12. First solenoid valve; 13. Second solenoid valve; 14. Third solenoid valve; 15. Fourth solenoid valve; 16. Gas-liquid separator; 17. Electric compressor; 18. First electronic expansion valve; 19. Fifth solenoid valve; 20. Second electronic expansion valve; 21. One-way valve; 22. Sixth solenoid valve; 23. Expansion kettle. DETAILED DESCRIPTION

[0028] The specific implementation methods of the utility model are further explained in detail below with reference to the accompanying drawings through the description of embodiments, with the aim of helping technicians in the field to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model and facilitating its implementation.

[0029] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower" and similar expressions used in this article are for illustrative purposes only.

[0030] It should be noted that, in the following embodiments, the "first", "second", "third", "fourth", "fifth" and "sixth" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] like Figures 1 to 12As shown, the utility model provides a vehicle thermal management system, including an HVAC assembly 2C (Heating, Ventilation and Air Conditioning) and a battery cooling circuit, wherein the battery cooling circuit includes a battery cooler 1 , and the battery cooling circuit is connected to the HVAC assembly 2 .

[0033] Specifically, if Figures 1 to 12 As shown, the HVAC assembly 2 includes an indoor heat exchanger 3, a blower 4 and a warm air heater 5, and the warm air heater 5 is connected to the battery cooling circuit. The battery cooling circuit also includes a WPTC heater 6, a battery water pump 7 and a first water valve 8. The WPTC heater 6 is located between the battery water pump 7 and the first water valve 8 and is connected to the battery water pump 7 and the first water valve 8. The battery water pump 7 is connected to the battery cooler 1, and the first water valve 8 is connected to the warm air heater 5, and the warm air heater 5 is connected to the battery pack 10. The first water valve 8 is connected to the second water valve 9, and the second water valve 9 is connected to the battery pack 10. The second water valve 9 is located between the first water valve 8 and the battery pack 10, and the first water valve 8 and the second water valve 9 are three-way valves. The first port of the first water valve 8 is connected to the second water valve 9, the second port of the first water valve 8 is connected to the WPTC heater 6, and the third port of the first water valve 8 is connected to the warm air heater 5. The water inlet of the battery cooler 1 is connected to the warm air heater 5 and the battery pack 10, and the water outlet of the battery cooler 1 is connected to the battery water pump 7. The battery cooler 1 can realize the cooling function of the battery and also realize the heating and defrosting function of the heat pump system.

[0034] like Figures 1 to 12 As shown, the vehicle thermal management system of the utility model further includes an outdoor condenser 11, which is connected to the first solenoid valve 12, which is connected to the second solenoid valve 13, which is connected to the indoor heat exchanger 3. The battery cooler 1 is connected to the third solenoid valve 14, which is connected to the fourth solenoid valve 15, which is connected to the outdoor condenser 11. The third solenoid valve 14 is connected to the gas-liquid separator 16, which is connected to the electric compressor 17, which is connected to the second solenoid valve 13. One end of the gas-liquid separator 16 is connected to the pipeline connecting the fourth solenoid valve 15 and the third solenoid valve 14, and the other end of the gas-liquid separator 16 is connected to one end of the electric compressor 17, which is connected to the pipeline connecting the first solenoid valve 12 and the second solenoid valve 13. One end of the sixth solenoid valve 22 is connected to the pipeline connecting the third solenoid valve 14 and the battery cooler 1, and the other end of the sixth solenoid valve 22 is connected to the indoor heat exchanger 3.

[0035] like Figures 1 to 12As shown, the outdoor condenser 11 is connected to the first electronic expansion valve 18, the first electronic expansion valve 18 is connected to the indoor heat exchanger 3, the indoor heat exchanger 3 is connected to the fifth solenoid valve 19, the fifth solenoid valve 19 is connected to the second electronic expansion valve 20, and the second electronic expansion valve 20 is connected to the battery cooler 1. One end of the fifth solenoid valve 19 is connected to the pipeline connecting the first electronic expansion valve 18 and the indoor heat exchanger 3, and the other end of the fifth solenoid valve 19 is connected to the pipeline connecting the check valve 21 and the second electronic expansion valve 20. The check valve 21 is located between the outdoor condenser 11 and the second electronic expansion valve 20 and is connected to the outdoor condenser 11 and the second electronic expansion valve 20. The check valve 21 is configured so that the liquid can only flow from the outdoor condenser 11 to the second electronic expansion valve 20.

[0036] like Figure 2 As shown, when the vehicle thermal management system works in the cab air conditioning cooling mode, the electric compressor 17 is running, and the liquid flows as follows: electric compressor 17 → first solenoid valve 12 → outdoor condenser 11 → first electronic expansion valve 18 → indoor heat exchanger 3 → sixth solenoid valve 22 → third solenoid valve 14 → gas-liquid separator 16 → electric compressor 17.

[0037] like Figure 3 As shown, when the vehicle thermal management system works in the battery cooling mode, the electric compressor 17 is running, and the liquid flows as follows: electric compressor 17 → first solenoid valve 12 → outdoor condenser 11 → one-way valve 21 → second electronic expansion valve 20 → battery cooler 1 → third solenoid valve 14 → gas-liquid separator 16 → electric compressor 17.

[0038] like Figure 4 As shown, when the vehicle thermal management system works in the battery temperature equalization mode, the battery water pump 7 is running, and the liquid flows as follows: battery water pump 7 → WPTC heater 6 → first water valve 8 → second water valve 9 → battery pack 10 → battery cooler 1.

[0039] like Figure 5 As shown, when the vehicle thermal management system works in the passenger compartment cooling and battery cooling mode, the electric compressor 17 is running, and one liquid flow direction is: electric compressor 17→first solenoid valve 12→outdoor condenser 11→one-way valve 21→second electronic expansion valve 20→battery cooler 1→third solenoid valve 14, and the other liquid flow direction is: electric compressor 17→first solenoid valve 12→outdoor condenser 11→first electronic expansion valve 18→indoor heat exchanger 3→sixth solenoid valve 22→third solenoid valve 14, and finally the condensed flow is directed to the gas-liquid separator 16 for circulation to achieve cooling of the passenger compartment and cooling of the battery pack 10.

[0040] like Figure 6As shown, when the vehicle thermal management system works in the passenger compartment heating mode, the electric compressor 17 is running, and the liquid flows as follows: electric compressor 17 → second solenoid valve 13 → indoor heat exchanger 3 → first electronic expansion valve 18 → outdoor condenser 11 → fourth solenoid valve 15 → gas-liquid separator 16 → electric compressor 17. This working mode is suitable for the case where the ambient temperature is ≥-10°C, and the heat pump heating uses the heat on the air side.

[0041] like Figure 7 As shown, when the vehicle thermal management system works in the passenger compartment heating and battery side supplementary heating mode, the electric compressor 17 is running, and the liquid flows as follows: electric compressor 17→second solenoid valve 13→indoor heat exchanger 3→fifth solenoid valve 19→second electronic expansion valve 20→battery cooler 1→third solenoid valve 14→gas-liquid separator 16→electric compressor 17. In this working mode, the battery pack 10 generates heat, and the water temperature of the battery pack 10 is higher than the temperature on the air side; the heating heat source comes from the heat on the battery side; the heat pump heating uses the battery cooler 1 to absorb the heat on the battery water side for heating the passenger compartment; there is no risk of frost in this mode.

[0042] like Figure 8 As shown, when the vehicle thermal management system works in the passenger compartment heat pump heating-WPTC supplementary heating mode, the electric compressor 17 and the battery water pump 7 are running, and one liquid flow direction is: electric compressor 17→second solenoid valve 13→indoor heat exchanger 3→fifth solenoid valve 19→second electronic expansion valve 20→battery cooler 1→third solenoid valve 14→gas-liquid separator 16→electric compressor 17. The other liquid flow direction is: battery water pump 7→WPTC heater 6→first water valve 8→second water valve 9→battery pack 10→battery water pump 7. This working mode is suitable for the case where the ambient temperature is less than 10°C. At this time, the water temperature of the battery pack 10 is also low. The WPTC heater 6 can be turned on for heating to supplement the battery circuit, thereby increasing the passenger compartment heat pump heating capacity; if the battery pack 10 needs to be heated, the hot water passes through the battery pack 10 to heat the battery pack 10; if the battery pack 10 does not need to be heated, the battery pack 10 is short-circuited.

[0043] like Fig. 9As shown, when the vehicle thermal management system works in the defrosting mode of the outdoor condenser 11, the electric compressor 17 and the battery water pump 7 are running, and one liquid flow direction is: electric compressor 17 → second solenoid valve 13 → indoor heat exchanger 3 → fifth solenoid valve 19 → second electronic expansion valve 20 → battery cooler 1 → third solenoid valve 14 → gas-liquid separator 16 → electric compressor 17. The other liquid flow direction is: battery water pump 7 → WPTC heater 6 → first water valve 8 → second water valve 9 → battery pack 10 → battery water pump 7. This working mode is suitable for the case where the ambient temperature is ≥0℃. In the defrosting mode, because the ambient temperature is ≥0℃, the outdoor condenser 11 uses the outside air to defrost; the air outlet temperature is maintained: the heat pump mode is switched, and the battery cooler 1 is used to absorb the heat on the battery water side, thereby maintaining the air outlet temperature in the vehicle.

[0044] like Fig.10 As shown, when the vehicle thermal management system works in the defrosting mode of another outdoor condenser 11, the electric compressor 17 and the battery water pump 7 are running, and one liquid flow direction is: the electric compressor 17 makes the liquid flow to the first solenoid valve 12 and the second solenoid valve 13 respectively, the liquid from the first solenoid valve 12 flows through the outdoor condenser 11 and the one-way valve 21 to the second electronic expansion valve 20 in turn, and the liquid from the second solenoid valve 13 flows through the indoor heat exchanger 3 and the fifth solenoid valve 19 to the second electronic expansion valve 20 in turn, and finally flows through the battery cooler 1, the third solenoid valve 14, and the gas-liquid separator 16 in turn, and returns to the electric compressor 17 to achieve a circulating flow. The other liquid flow direction is: battery water pump 7→WPTC heater 6→first water valve 8→second water valve 9→battery pack 10→battery water pump 7. In this working mode, when the natural defrosting speed is slow or the ambient temperature is low; defrosting method: use high-temperature refrigerant to melt the frost layer on the surface of the outdoor condenser 11; outlet temperature maintenance: heat pump mode is switched, and the battery cooler 1 is used to absorb the heat on the battery water side. If the heat on the battery water side is insufficient, the WPTC heater 6 is used for supplementary heating.

[0045] like Fig.11 As shown, when the vehicle thermal management system works in the battery heating-WPTC mode, the battery water pump 7 is running, and the liquid flows as follows: battery water pump 7 → WPTC heater 6 → first water valve 8 → second water valve 9 → battery pack 10 → battery cooler 1, realizing a circulating flow.

[0046] like Fig.12 As shown, when the vehicle thermal management system works in the cockpit heating and battery heating modes, the electric compressor 17 and the battery water pump 7 are running, and the liquid flows in the following direction: electric compressor 17 → second solenoid valve 13 → indoor heat exchanger 3 → fifth solenoid valve 19 → second electronic expansion valve 20 → battery cooler 1 → third solenoid valve 14 → gas-liquid separator 16 → electric compressor 17.

[0047] Another liquid flow direction is: the electric compressor 17 makes the liquid flow to the first solenoid valve 12 and the second solenoid valve 13 respectively, the liquid from the first solenoid valve 12 flows through the outdoor condenser 11 and the one-way valve 21 to the second electronic expansion valve 20 in sequence, the liquid from the second solenoid valve 13 flows through the indoor heat exchanger 3 and the fifth solenoid valve 19 to the second electronic expansion valve 20 in sequence, and finally flows through the battery cooler 1, the third solenoid valve 14, the gas-liquid separator 16 in sequence, and returns to the electric compressor 17 to achieve a circulating flow. Another liquid flow direction is: the battery water pump 7 makes the liquid flow to the WPTC heater 6 and the first water valve 8, a part of the liquid from the first water valve 8 flows through the warm air heater 5 and then flows to the battery pack 10, and another part of the liquid from the first water valve 8 flows through the second water valve 9 and then flows to the battery pack 10 to achieve a circulating flow.

[0048] The vehicle thermal management system with the above structure has the following advantages:

[0049] 1. The vehicle thermal management system has the functions of heating and cooling the passenger compartment, heating, cooling and equalizing the temperature of the power battery;

[0050] 2. The refrigerant side of the vehicle thermal management system changes the flow direction of the refrigerant through a solenoid valve, which simply and reliably realizes the heat pump function;

[0051] 3. The vehicle thermal management system includes a battery cooler 1, which can realize the cooling function of the battery and the heating and defrosting function of the heat pump system;

[0052] 4. The vehicle thermal management system includes 11 working modes, with the advantages of system energy saving and high passenger compartment comfort.

[0053] The utility model also provides a vehicle, including the vehicle thermal management system of the above structure. The specific structure of the vehicle thermal management system can be referred to Figures 1 to 12 Since the vehicle of the utility model includes the whole vehicle thermal management system in the above embodiment, it has all the advantages of the above whole vehicle thermal management system.

[0054] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A vehicle thermal management system, including an HVAC assembly and a battery cooling circuit, wherein the battery cooling circuit includes a battery cooler, characterized in that: The battery cooling circuit is connected to the HVAC assembly; The HVAC assembly includes an indoor heat exchanger, a blower, and a warm air heater, and the warm air heater is connected to the battery cooling circuit.

2. The vehicle thermal management system according to claim 1, characterized in that: The battery cooling circuit also includes a WPTC heater, a battery water pump and a first water valve. The WPTC heater is located between the battery water pump and the first water valve and is connected to the battery water pump and the first water valve. The battery water pump is connected to the battery cooler. The first water valve is connected to the battery pack and the warm air heater. The warm air heater is connected to the battery pack.

3. The vehicle thermal management system according to claim 1, characterized in that: It also includes an outdoor condenser, which is connected to the first solenoid valve, the first solenoid valve is connected to the second solenoid valve, and the second solenoid valve is connected to the indoor heat exchanger.

4. The vehicle thermal management system according to claim 3, characterized in that: The battery cooler is connected to a third solenoid valve, the third solenoid valve is connected to a fourth solenoid valve, and the fourth solenoid valve is connected to the outdoor condenser.

5. The vehicle thermal management system according to claim 4, characterized in that: The third solenoid valve is connected to a gas-liquid separator, the gas-liquid separator is connected to an electric compressor, and the electric compressor is connected to the second solenoid valve.

6. The vehicle thermal management system according to claim 3, characterized in that: The outdoor condenser is connected to a first electronic expansion valve, the first electronic expansion valve is connected to the indoor heat exchanger, the indoor heat exchanger is connected to a fifth solenoid valve, the fifth solenoid valve is connected to a second electronic expansion valve, and the second electronic expansion valve is connected to the battery cooler.

7. A vehicle, characterized in that: A vehicle thermal management system comprising any one of claims 1 to 6.

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