Hybrid vehicle type thermal management system architecture and control method thereof

Abstract

The invention discloses a hybrid power vehicle type thermal management system architecture and a control method thereof. The hybrid power vehicle type thermal management system architecture comprises an air conditioning system, an electric drive cooling system and an engine cooling system. The air conditioning system can refrigerate a vehicle passenger compartment and a battery through the heat pump technology. The electric drive cooling system and the engine cooling system can heat a vehicle passenger compartment through the warm air core body. And the heating film is arranged on the battery. The whole system is simple in structure and easy to control, exhaust and vacuumizing of the system can be achieved through a single degassing chamber, in addition, waste heat of a motor or an engine can be utilized, and energy conservation and high efficiency are achieved.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a hybrid vehicle thermal management system architecture and a control method thereof. Background Art

[0002] At present, for the models that have been put into production or are under development, the thermal management system of hybrid models generally adopts a non-heat pump solution, using the engine waste heat and high-pressure air PTC for auxiliary heating to achieve the passenger compartment and battery heating functions, and the battery side heating is achieved through a double-plate heat exchanger for cooling and heating. Among them, the passenger compartment water cycle and the engine cycle are connected in series or parallel, and can share a degassing chamber, the air conditioning warm air cycle uses a degassing chamber, and the battery cooling cycle uses a separate degassing chamber. The entire system structure is complex and the parts are heavy, which will lead to an overall high system cost. Summary of the invention

[0003] The problem to be solved by the present invention is to overcome the defects of the prior art and provide a hybrid vehicle thermal management system architecture and a control method thereof, which adopts a single degassing chamber design and has a simple system structure.

[0004] In order to solve the above technical problems, the present invention provides a hybrid vehicle thermal management system architecture, including an air-conditioning system, an electric drive cooling system and an engine cooling system; the air-conditioning system can cool the vehicle passenger compartment and the battery through heat pump technology; the electric drive cooling system and the engine cooling system can both heat the vehicle passenger compartment through a warm air core; and also includes a heating film arranged on the battery.

[0005] In the above hybrid vehicle thermal management system architecture, a heat pump direct cooling solution is used to cool the passenger compartment and battery, the motor waste heat and engine waste heat are used to heat the passenger compartment, and the heating film is used to directly heat the battery. The entire system has a simple structure and is easy to control. In addition, a single degassing chamber can be used to achieve system exhaust vacuum. In addition, the motor or engine waste heat can be used, which is energy-saving and efficient.

[0006] As an improvement of the thermal management system architecture of the hybrid vehicle of the present invention, the air conditioning system includes a compressor, a condenser, an evaporator, a battery direct cooling plate and an air conditioning blower; the compressor is used to drive the flow of refrigerant, the condenser is used to make the refrigerant flowing through release heat; the evaporator is used to make the refrigerant flowing through absorb heat, and then cooperate with the air conditioning blower to achieve cooling of the vehicle passenger compartment; the battery direct cooling plate is used to make the refrigerant flowing through absorb heat, and then achieve cooling of the battery. Preferably, the air conditioning system also includes pipelines and valves to achieve corresponding functions.

[0007] Furthermore, the air conditioning system also includes an electronic fan, which is used to blow air toward the condenser to increase heat dissipation efficiency.

[0008] Furthermore, the air-conditioning system also includes a first expansion valve and a second expansion valve; the outlet of the compressor is connected to the condenser; the condenser is connected to the evaporator, and the first expansion valve is arranged on the connecting pipeline; the condenser is connected to the battery direct cooling plate, and the second expansion valve is arranged on the connecting pipeline; the evaporator is connected to the inlet of the compressor; the battery direct cooling plate is connected to the inlet of the compressor.

[0009] Furthermore, the air conditioning system also includes a coaxial tube. The coaxial tube enables the high-pressure and low-pressure pipes to perform heat exchange, so that the refrigerant in the high-pressure pipe cools the refrigerant in the low-pressure pipe, thereby reducing the supercooling degree of the low-pressure refrigerant and increasing its superheating degree. Since the coaxial tube can more effectively utilize the energy of the refrigerant, it can significantly reduce the temperature of the air outlet of the air conditioner and improve the comfort of the passengers.

[0010] Furthermore, the air conditioning system also includes a pressure temperature sensor and a first pressure sensor, wherein the pressure temperature sensor is used to detect the pressure and temperature at the outlet of the battery direct cooling plate; the first pressure sensor is used to detect the temperature at the outlet of the condenser. The pressure temperature sensor and the first pressure sensor can monitor the operation of the entire air conditioning system to ensure stable operation.

[0011] Preferably, the first expansion valve is a thermal expansion valve, and the second expansion valve is an electronic expansion valve.

[0012] Furthermore, the hybrid vehicle thermal management system architecture also includes an electric heating element, which can cooperate with the air conditioning blower to heat the vehicle passenger compartment. Preferably, the electric heating element is an air PTC (Positive Temperature Coefficient, which is an existing heating technology that generates heat by electricity.

[0013] Furthermore, the air conditioning system also includes a fourth temperature sensor, which is used to detect the temperature of the side of the evaporator away from the air conditioning blower, and then monitor the cooling condition of the passenger compartment.

[0014] As another improvement to the thermal management system architecture of the hybrid vehicle of the present invention, the electric drive cooling system and the engine cooling system use the same coolant and can be connected through a four-way valve, thereby achieving that both the electric drive cooling system and the engine cooling system can heat the vehicle passenger compartment through the heater core. Preferably, the coolant is water.

[0015] Furthermore, the electric drive cooling system is used to cool the electric drive system, including a first circulation pump, a three-way valve, a first radiator, the four-way valve, the heater core and an expansion water tank; the outlet of the first circulation pump is connected to the port a of the three-way valve; the port c of the three-way valve is connected to the port a of the four-way valve; the port c of the three-way valve is connected to the first radiator; the first radiator is connected to the port a of the four-way valve; the port b of the four-way valve is connected to the first circulation pump; the ports c and d of the four-way valve are respectively connected to the heater core; the expansion water tank is connected to the port c of the four-way valve; the coolant between the outlet of the first circulation pump and the port a of the three-way valve flows through the electric drive system, and can absorb and take away the heat generated by the operation of the electric drive system.

[0016] Furthermore, the heat-generating components of the electric drive system include an oil cooler, a motor, a controller, an inverter, etc.

[0017] Furthermore, the electric drive cooling system also includes a first temperature sensor, which is used to detect the temperature of the coolant in the connecting pipeline between the outlet of the first circulation pump and the port a of the three-way valve; when the detected temperature of the first temperature sensor is greater than the set temperature value, the three-way valve keeps the port a and the port c connected to ensure the heat dissipation efficiency of the electric drive system to prevent the motor operating temperature from being too high.

[0018] Further, the engine cooling system is used to cool the engine, including a second circulation pump, a thermostat, a second radiator, a one-way valve, the four-way valve, the heater core, the expansion water tank and a stop valve; the outlet of the second circulation pump is connected to the thermostat; the thermostat is connected to the second radiator; the second radiator is connected to the inlet of the second circulation pump, and the inlet of the second circulation pump is connected to the port c of the four-way valve; the one-way valve is arranged on the connecting pipeline between the port c of the four-way valve and the heater core; the inlet of the thermostat is connected to the heater core, and the stop valve is arranged on the connecting pipeline; the expansion water tank is also connected to the second radiator and the outlet of the second circulation pump; the coolant between the outlet of the second circulation pump and the thermostat flows through the engine, and can absorb and take away the heat generated by the operation of the engine. Preferably, the one-way valve can only allow the coolant to flow from the port c of the four-way valve to the heater core.

[0019] Furthermore, the electric drive cooling system further comprises an electronic fan, which can blow air to the first radiator and the second radiator to improve the heat dissipation efficiency. Preferably, the first radiator is a low-temperature radiator, and the second radiator is a high-temperature radiator.

[0020] Furthermore, the inlet and outlet of the battery direct cooling plate are respectively provided with a second temperature sensor and a third temperature sensor, which can monitor the temperature of the battery.

[0021] As another improvement to the thermal management system architecture of the hybrid vehicle of the present invention, the battery is provided with an electric heating film.

[0022] In order to solve the above technical problems, the present invention provides a control method for the above hybrid vehicle thermal management system architecture, including: when the electric drive cooling system heats the vehicle passenger compartment through the heater core, control so that: the first expansion valve and the second expansion valve are both closed, the one-way valve is opened, the stop valve is closed, the port a of the three-way valve is connected to the port c, the port a of the four-way valve is connected to the port c, and the port c is connected to the port d. Preferably, at the same time, control so that: the compressor does not work, the first circulation pump works, the second circulation pump does not work, and the air conditioner blower works.

[0023] Furthermore, when the engine cooling system heats the vehicle passenger compartment through the heater core, the first expansion valve and the second expansion valve are both closed, the one-way valve is closed, the stop valve is opened, the port a and the port b of the three-way valve are connected, the port a and the port b of the four-way valve are connected, and the port c and the port d are connected. Preferably, the compressor is controlled to not work, the first circulation pump is not working, the second circulation pump is working, the electronic fan is working, and the air conditioner blower is working.

[0024] Furthermore, when the hybrid vehicle thermal management system architecture is evacuated, the control is to make: the a and b ports of the three-way valve connected, and the a and c ports are also connected, and the connection opening is %; the a and c ports of the four-way valve are connected, and the b and d ports are connected; the one-way valve and the stop valve are in the open state. When the new car is off the assembly line, only one degassing chamber is used to ensure the effective exhaust of the system and ensure normal vacuuming.

[0025] In summary, the hybrid vehicle thermal management system architecture and control method described above have the following beneficial effects:

[0026] 1. Adopt a single degassing chamber, cancel the water PTC and water pump solution, use air heating, simplify system components, increase vehicle layout space, and reduce system weight and cost space;

[0027] 2. The thermal management system architecture can realize direct cooling of the passenger compartment and the battery, and can realize that the waste heat of the engine or motor directly enters the passenger compartment for heating, thereby improving the heat exchange efficiency;

[0028] 3. The thermal management system architecture can realize direct cooling of the passenger compartment and the battery, and can realize that the waste heat of the engine or motor directly enters the passenger compartment for heating, thereby improving the heat exchange efficiency;

[0029] 4. The system architecture is simple and can realize multiple functional modes. The system control function mode logic can be applied to different types of vehicles. The system has high heat exchange efficiency, simple control, light system weight and superior cost.

[0030] 5. The system architecture is applicable to all hybrid platform models, and the system control strategy can achieve optimal control logic to reduce system energy consumption and improve vehicle range. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the attached picture:

[0032] Figure 1 It is a schematic diagram of the thermal management system architecture of a hybrid vehicle of the present invention.

[0033] In the figure, 1. three-way valve; 2. first temperature sensor; 3. electric drive system; 4. first circulation pump; 5. four-way valve; 6. one-way valve; 7. compressor; 8. first radiator; 9. second circulation pump; 10. air conditioning blower; 11. evaporator; 12. heater core; 13. electric heating element; 14. pressure temperature sensor; 15. battery direct cooling plate; 16. condenser; 17. second radiator; 18. electronic fan; 19. engine; 20. thermostat; 21. first expansion valve; 22. second expansion valve; 23. first pressure sensor; 24. coaxial tube; 25. expansion water tank; 26. fourth temperature sensor; 27. second temperature sensor; 28. third temperature sensor; 29. ​​stop valve. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0035] Example 1

[0036] Figure 1 FIG. 1 shows a hybrid vehicle thermal management system architecture of the present invention. Figure 1 As shown, the thermal management system architecture of the hybrid vehicle includes an air-conditioning system, an electric drive cooling system and an engine cooling system; the air-conditioning system can cool the vehicle passenger compartment and the battery through the heat pump technology; the electric drive cooling system and the engine cooling system can both heat the vehicle passenger compartment through the heater core 12; and it also includes a heating film arranged on the battery.

[0037] The air conditioning system includes a compressor 7, a condenser 16, an evaporator 11, a battery direct cooling plate 15 and an air conditioning blower 10; the compressor 7 is used to drive the flow of refrigerant, the condenser 16 is used to make the refrigerant flowing through release heat; the evaporator 11 is used to make the refrigerant flowing through absorb heat, and then cooperate with the air conditioning blower 10 to achieve cooling of the vehicle passenger compartment; the battery direct cooling plate 15 is used to make the refrigerant flowing through absorb heat, and then achieve cooling of the battery. Preferably, the air conditioning system also includes pipelines and valves to achieve corresponding functions.

[0038] The air conditioning system further includes an electronic fan 18, which is used to blow air toward the condenser 16 to increase heat dissipation efficiency.

[0039] The air-conditioning system also includes a first expansion valve 21 and a second expansion valve 22; the outlet of the compressor 7 is connected to the condenser 16; the condenser 16 is connected to the evaporator 11, and a first expansion valve 21 is provided on the connecting pipeline; the condenser 16 is connected to the battery direct cooling plate 15, and a second expansion valve 22 is provided on the connecting pipeline; the evaporator 11 is connected to the inlet of the compressor 7; the battery direct cooling plate 15 is connected to the inlet of the compressor 7.

[0040] The air conditioning system also includes a coaxial tube 24. The coaxial tube 24 enables the high-pressure and low-pressure pipes to exchange heat, so that the refrigerant in the high-pressure pipe cools the refrigerant in the low-pressure pipe, thereby reducing the subcooling degree of the low-pressure refrigerant and increasing its superheating degree. Since the coaxial tube 24 can more effectively utilize the energy of the refrigerant, it can significantly reduce the temperature of the air outlet of the air conditioner and improve the comfort of the passengers.

[0041] The air conditioning system also includes a pressure temperature sensor 14 and a first pressure sensor 23. The pressure temperature sensor 14 is used to detect the pressure and temperature at the outlet of the battery direct cooling plate 15; the first pressure sensor 23 is used to detect the temperature at the outlet of the condenser 16. The pressure temperature sensor 14 and the first pressure sensor 23 can monitor the operation of the entire air conditioning system to ensure stable operation. The first expansion valve 21 adopts a thermal expansion valve, and the second expansion valve 22 adopts an electronic expansion valve.

[0042] The hybrid vehicle thermal management system architecture also includes an electric heating element 13, which can cooperate with the air conditioning blower 10 to heat the vehicle passenger compartment. Preferably, the electric heating element 13 is an air PTC (Positive Temperature Coefficient, which is an existing heating technology that generates heat by electricity.

[0043] The air conditioning system further includes a fourth temperature sensor 26, which is used to detect the temperature of a side of the evaporator 11 away from the air conditioning blower 10, and further monitor the cooling condition of the passenger compartment.

[0044] The electric drive cooling system and the engine cooling system use the same coolant and can be connected through the four-way valve 5, so that both the electric drive cooling system and the engine cooling system can heat the vehicle passenger compartment through the heater core 12. Preferably, the coolant is water.

[0045] The electric drive cooling system is used to cool the electric drive system 3, including a first circulation pump 4, a three-way valve 1, a first radiator 8, a four-way valve 5, a heater core 12 and an expansion water tank 25; the outlet of the first circulation pump 4 is connected to the port a of the three-way valve 1; the port c of the three-way valve 1 is connected to the port a of the four-way valve 5; the port c of the three-way valve 1 is connected to the first radiator 8; the first radiator 8 is connected to the port a of the four-way valve 5; the port b of the four-way valve 5 is connected to the first circulation pump 4; the port c and the port d of the four-way valve 5 are respectively connected to the heater core 12; the expansion water tank 25 is connected to the port c of the four-way valve 5; the coolant between the outlet of the first circulation pump 4 and the port a of the three-way valve 1 flows through the electric drive system 3, and can absorb and take away the heat generated by the operation of the electric drive system 3.

[0046] The heat-generating components of the electric drive system 3 include an oil cooler, a motor, a controller, an inverter, and the like.

[0047] The electric drive cooling system also includes a first temperature sensor 2, which is used to detect the temperature of the coolant in the connecting pipeline between the outlet of the first circulation pump 4 and the port a of the three-way valve 1; when the detected temperature of the first temperature sensor 2 is greater than the set temperature value, the three-way valve 1 keeps the port a and the port c connected to ensure the heat dissipation efficiency of the electric drive system 3 to prevent the motor operating temperature from being too high.

[0048] The engine cooling system is used to cool the engine 19, and includes a second circulation pump 9, a thermostat 20, a second radiator 17, a one-way valve 6, a four-way valve 5, a heater core 12, an expansion water tank 25 and a stop valve 29; the outlet of the second circulation pump 9 is communicated with the thermostat 20; the thermostat 20 is communicated with the second radiator 17; the second radiator 17 is communicated with the inlet of the second circulation pump 9, and the inlet of the second circulation pump 9 is communicated with the port C of the four-way valve 5; the one-way valve 6 is arranged on the connecting pipeline between the port C of the four-way valve 5 and the heater core 12; the inlet of the thermostat 20 is communicated with the heater core 12, and the stop valve 29 is arranged on the connecting pipeline; the expansion water tank 25 is also communicated with the second radiator 17 and the outlet of the second circulation pump 9; the coolant between the outlet of the second circulation pump 9 and the thermostat 20 flows through the engine 19, and can absorb and take away the heat generated by the operation of the engine 19. Preferably, the one-way valve 6 can only allow the coolant to flow from the port c of the four-way valve 5 to the heater core 12 .

[0049] The electric drive cooling system further includes an electronic fan 18, which can blow air to the first radiator 8 and the second radiator 17 to improve the heat dissipation efficiency. Preferably, the first radiator 8 is a low-temperature radiator, and the second radiator 17 is a high-temperature radiator.

[0050] The inlet and outlet of the battery direct cooling plate 15 are respectively provided with a second temperature sensor 27 and a third temperature sensor 28 , which can monitor the temperature of the battery.

[0051] Example 2

[0052] The present invention provides a control method for the above hybrid vehicle thermal management system architecture, including but not limited to the following seven usage scenarios.

[0053] 1. When only the passenger compartment is cooled, the control is such that: the first expansion valve 21 is opened, the second expansion valve 22 is closed, the one-way valve 6 and the stop valve 29 are both closed, the port a and the port b of the three-way valve 1 are connected, the port a and the port b of the four-way valve 5 are connected and the port c and the port d are connected, the compressor 7 is turned on, the electronic fan 18 and the air-conditioning blower 10 are working, and the electric heating element 13 is not working.

[0054] The refrigerant circulation loop of the refrigerant is: compressor 7-condenser 16-first expansion valve 21-evaporator 11-compressor 7. The refrigerant releases heat at the condenser 16 and absorbs heat at the evaporator 11. The refrigerant cooperates with the air conditioner blower 10 to blow air to achieve refrigeration of the passenger compartment. Specifically, the refrigerant enters the condenser 16 from the compressor 7 for condensation heat exchange, and then further cools through heat exchange through the coaxial tube, throttling expansion through the first expansion valve 21, and finally enters the evaporator 11 for evaporation and heat absorption to achieve refrigeration of the passenger compartment.

[0055] 2. When only the battery is cooled, the control is such that: the first expansion valve 21 is closed, the second expansion valve 22 is opened, the one-way valve 6 and the stop valve 29 are both closed, the a port and the b port of the three-way valve 1 are connected, the a port and the b port of the four-way valve 5 are connected and the c port and the d port are connected, the compressor 7 is turned on, the air conditioning blower 10 is not working, the electronic fan 18 is working, and the electric heating element 13 is not working.

[0056] The refrigerant circulation loop of the refrigerant is: compressor 7-condenser 16-second expansion valve 22-battery direct cooling plate 15-compressor 7. The refrigerant releases heat at the condenser 16 and absorbs heat at the battery direct cooling plate 15 to achieve battery cooling. Specifically, the refrigerant enters the condenser 16 from the compressor 7 for condensation heat exchange, and then further cools through heat exchange through the coaxial tube. The second expansion valve 22 is adjusted for throttling expansion through opening, and the low-temperature and low-pressure refrigerant enters the battery direct cooling plate 15 for heat exchange to achieve battery direct cooling.

[0057] 3. When cooling the passenger compartment and the battery at the same time, the control is such that: the first expansion valve 21 and the second expansion valve 22 are both opened, the one-way valve 6 and the stop valve 29 are both closed, the a port and the b port of the three-way valve 1 are connected, the a port and the b port of the four-way valve 5 are connected and the c port and the d port are connected, the compressor 7 is turned on, the electronic fan 18 and the air-conditioning blower 10 are working, and the electric heating element 13 is not working.

[0058] The refrigerant enters the condenser 16 from the compressor 7 for condensation heat exchange, and then is further cooled by heat exchange through the coaxial tube. Then the refrigerant is divided into two paths. One path is throttled and expanded through the first expansion valve 21, and finally enters the evaporator 11 for evaporation and heat absorption. The other path is throttled and expanded by adjusting the opening of the second expansion valve 22. The low-temperature and low-pressure refrigerant enters the battery direct cooling plate 15 for heat absorption, realizing simultaneous cooling. The specific cooling effect on the passenger compartment and the battery can be adjusted by adjusting the opening of the first expansion valve 21 and the second expansion valve 22.

[0059] In the above-mentioned first, second and third refrigeration processes, when the passenger compartment or the battery is cooled, the port a and the port b of the four-way valve 5 are connected and the port c and the port d are connected, the stop valve 29 is closed, the port a and the port b of the three-way valve 1 are connected, and the first circulation pump 4 or the second circulation pump 9 works to ensure the cooling of the motor or the engine.

[0060] 4. When heating the battery, the battery side has its own electric heating film, which can directly realize the battery heating function.

[0061] 5. When the electrically driven cooling system heats the vehicle passenger compartment through the heater core 12, the control is such that: the first expansion valve 21 and the second expansion valve 22 are both closed, the one-way valve 6 is opened, the stop valve 29 is closed, the port a and the port c of the three-way valve 1 are connected, the port a and the port c of the four-way valve 5 are connected and the port c and the port d are connected, the compressor 7 does not work, the first circulating pump 4 works, the second circulating pump 9 does not work, the air conditioning blower 10 works, and the electric heating element 13 may work or not work.

[0062] When port a and port c of the three-way valve 1 are connected, the electronic fan 18 does not need to blow air to the first radiator 8, and the electronic fan 18 may not work. However, when the first temperature sensor 2 detects that the coolant temperature is greater than 70°C, the three-way valve 1 switches to the state where port a and port c are connected, and heat is dissipated from the first radiator 8. At this time, the electronic fan 18 is needed to ensure normal cooling of the motor and accessory controller.

[0063] In pure electric operation, the electric drive system 3 drives the vehicle. At this time, the passenger compartment is heated mainly by the heat of the electric drive system, and the electric heating element 13 can be used for auxiliary heating. The circulation loop of the coolant in the electric drive cooling system is: first circulation pump 4-electric drive system 3-port a and port c of three-way valve 1-port a and port c of four-way valve 5-check valve 6-heater core 12-port b and port d of four-way valve 5-first circulation pump 4.

[0064] When the vehicle is driving, the first circulation pump 4 drives the coolant to pass through the electric drive system 3 to absorb heat, and then enters the three-way valve 1, the four-way valve 5, the one-way valve 6, and enters the heater core 12 to release heat. The heater core 12 cooperates with the air-conditioning blower 10 to utilize the waste heat of the electric drive system 3 to heat the passenger compartment.

[0065] When the vehicle is idling or driving, if the heat of the electric drive system 3 cannot meet the heating demand of the passenger compartment, the electric heating element 13 can be turned on at the same time to assist in heating. The high-pressure air PTC can realize the stepless power regulation function to minimize the system power consumption.

[0066] 6. When the engine cooling system heats the vehicle passenger compartment through the heater core 12, the control is such that: the first expansion valve 21 and the second expansion valve 22 are both closed, the one-way valve 6 is closed, the stop valve 29 is opened, the port a and the port b of the three-way valve 1 are connected, the port a and the port b of the four-way valve 5 are connected and the port c and the port d are connected, the compressor 7 does not work, the first circulating pump 4 does not work, the second circulating pump 9 works, the electronic fan 18 works, the air conditioning blower 10 works, and the electric heating element 13 may work or not work.

[0067] The hybrid mode engine and motor can be connected in series or in parallel. The passenger compartment heating is mainly achieved through engine waste heat or PTC heating. Because the temperature of the coolant in the engine cooling system is higher than that of the electric drive cooling system, the electric drive system 3 mainly dissipates heat through the first radiator 8. When the vehicle is idling or driving, the circulation loop of the coolant in the engine cooling system is: the second circulation pump 9 drives the coolant to flow through the engine 19 to take away the heat, and then it is divided into two paths, one path flows into the second radiator 17 through the thermostat 20, and the other path flows into the heater core 12, and then flows through the c port and d port of the four-way valve 5, and finally both paths flow back to the second circulation pump 9. In the actual process, the ratio of the two coolants can be controlled by the thermostat 20 to ensure that the engine heat dissipation achieves the best heat recovery effect.

[0068] In special cases, when the vehicle is started from a cold engine, the electric heating element 13 needs to be turned on for auxiliary heating or windshield defrosting.

[0069] 7. This thermal management system architecture can be applied to various hybrid vehicle models. This system architecture uses a single degassing chamber to fill and exhaust the system coolant. When a new car rolls off the production line, in order to ensure effective exhaust of the system and normal vacuuming; the a port and the b port of the three-way valve 1 are connected, and the a port and the c port are also connected, and the connection opening is 50%; the a port and the c port of the four-way valve are connected, and the b port and the d port are connected, and the one-way valve 6 and the stop valve 29 are in the open state.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A hybrid vehicle thermal management system architecture, characterized in that: The invention comprises an air conditioning system, an electric drive cooling system and an engine cooling system; the air conditioning system can realize cooling of the vehicle passenger compartment and the battery through the heat pump technology; the electric drive cooling system and the engine cooling system can realize heating of the vehicle passenger compartment through the warm air core (12); and the invention also comprises a heating film arranged on the battery.

2. A hybrid vehicle thermal management system architecture according to claim 1, characterized in that: The air conditioning system comprises a compressor (7), a condenser (16), an evaporator (11), a battery direct cooling plate (15) and an air conditioning blower (10); The compressor (7) is used to drive the flow of refrigerant, and the condenser (16) is used to make the refrigerant flowing through release heat; the evaporator (11) is used to make the refrigerant flowing through absorb heat, and then cooperate with the air-conditioning blower (10) to achieve cooling of the vehicle passenger compartment; the battery direct cooling plate (15) is used to make the refrigerant flowing through absorb heat, and then achieve cooling of the battery.

3. A hybrid vehicle thermal management system architecture according to claim 2, characterized in that: The air conditioning system further comprises a first expansion valve (21) and a second expansion valve (22); The outlet of the compressor (7) is connected to the condenser (16); the condenser (16) is connected to the evaporator (11), and the first expansion valve (21) is provided on the connecting pipeline; the condenser (16) is connected to the battery direct cooling plate (15), and the second expansion valve (22) is provided on the connecting pipeline; the evaporator (11) is connected to the inlet of the compressor (7); the battery direct cooling plate (15) is connected to the inlet of the compressor (7).

4. A hybrid vehicle thermal management system architecture according to claim 2, characterized in that: It also includes an electric heating element (13), and the electric heating element (13) can cooperate with the air-conditioning blower (10) to heat the vehicle passenger compartment.

5. The hybrid vehicle thermal management system architecture according to claim 1, characterized in that: The electric drive cooling system and the engine cooling system use the same coolant and can be communicated via a four-way valve (5).

6. A hybrid vehicle thermal management system architecture according to claim 5, characterized in that: The electric drive cooling system is used to cool the electric drive system (3), and comprises a first circulation pump (4), a three-way valve (1), a first radiator (8), the four-way valve (5), the heater core (12) and an expansion water tank (25); The outlet of the first circulation pump (4) is communicated with the port a of the three-way valve (1); the port c of the three-way valve (1) is communicated with the port a of the four-way valve (5); the port b of the three-way valve (1) is communicated with the first radiator (8); the first radiator (8) is communicated with the port a of the four-way valve (5); the port b of the four-way valve (5) is communicated with the first circulation pump (4); the ports c and d of the four-way valve (5) are respectively communicated with the heater core (12); the expansion water tank (25) is communicated with the port c of the four-way valve (5); The coolant between the outlet of the first circulation pump (4) and the port a of the three-way valve (1) flows through the electric drive system (3), and can absorb and carry away the heat generated by the operation of the electric drive system (3).

7. A hybrid vehicle thermal management system architecture according to claim 6, characterized in that: The invention also comprises a first temperature sensor (2), wherein the first temperature sensor (2) is used to detect the temperature of the coolant in the connecting pipeline between the outlet of the first circulation pump (4) and the port a of the three-way valve (1); when the temperature detected by the first temperature sensor (2) is greater than the set temperature value, the three-way valve (1) keeps the port a connected with the port c.

8. The hybrid vehicle thermal management system architecture according to claim 6, characterized in that: The engine cooling system is used to cool the engine (19), and comprises a second circulation pump (9), a thermostat (20), a second radiator (17), a one-way valve (6), the four-way valve (5), the heater core (12), the expansion water tank (25) and a stop valve (29); The outlet of the second circulation pump (9) is in communication with the thermostat (20); the thermostat (20) is in communication with the second radiator (17); the second radiator (17) is in communication with the inlet of the second circulation pump (9), and the inlet of the second circulation pump (9) is in communication with the port C of the four-way valve (5); the one-way valve (6) is arranged on the connecting pipeline between the port C of the four-way valve (5) and the heater core (12); the inlet of the thermostat (20) is in communication with the heater core (12), and the stop valve (29) is arranged on the connecting pipeline; the expansion water tank (25) is also in communication with the second radiator (17) and the outlet of the second circulation pump (9); The coolant between the outlet of the second circulation pump (9) and the thermostat (20) flows through the engine (19), and can absorb and take away the heat generated by the operation of the engine (19).

9. A hybrid vehicle thermal management system architecture according to claim 8, characterized in that: It also comprises an electronic fan (18), wherein the electronic fan (18) can blow air toward the first radiator (8) and the second radiator (17), thereby improving the heat dissipation efficiency.

10. A control method for a hybrid vehicle thermal management system architecture according to any one of claims 1 to 9, characterized in that: include: When the electrically driven cooling system heats the vehicle passenger compartment through the heater core (12), the first expansion valve (21) and the second expansion valve (22) are controlled so that: the one-way valve (6) is opened, the stop valve (29) is closed, the port a and the port c of the three-way valve (1) are connected, the port a and the port c of the four-way valve (5) are connected, and the port c and the port d are connected.

11. A control method according to claim 10, characterized in that: When the engine cooling system heats the vehicle passenger compartment through the heater core (12), the control is such that: the first expansion valve (21) and the second expansion valve (22) are both closed, the one-way valve (6) is closed, the stop valve (29) is opened, the a port and the b port of the three-way valve (1) are connected, the a port and the b port of the four-way valve (5) are connected, and the c port and the d port are connected.

12. A control method according to claim 10, characterized in that: When the hybrid vehicle thermal management system architecture is evacuated, the control is performed so that: the a port and the b port of the three-way valve (1) are connected, and the a port and the c port are also connected, and the connection opening degrees are all 50%; the a port and the c port of the four-way valve (5) are connected, and the b port and the d port are connected; the one-way valve (6) and the stop valve (29) are in an open state.

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