A hybrid vehicle integrated thermal management system

Abstract

The utility model provides a kind of hybrid electric vehicle technical field's hybrid electric vehicle integrated heat management system, including indoor refrigeration cycle pipeline, battery motor cooling cycle pipeline, heat pump cycle pipeline, battery and air heating cycle pipeline, motor electric control cycle pipeline, heat dissipation cycle pipeline, engine cycle pipeline, indoor condenser, indoor air heating core, heat exchanger, three-way valve, four-way valve, three-way valve is arranged between indoor refrigeration cycle pipeline, heat pump cycle pipeline, three-way valve is arranged in motor electric control cycle pipeline, heat dissipation cycle pipeline, four-way valve is arranged between battery and air heating cycle pipeline, motor electric control cycle pipeline, heat exchanger is arranged between heat pump cycle pipeline, motor electric control cycle pipeline, heat exchanger is arranged between battery motor cooling cycle pipeline, battery and air heating cycle pipeline.The utility model can combine together with engine, battery, motor, air conditioner, air heating system, carry out the coupling utilization of heat.The utility model not only simple structure, and whole system energy efficiency is higher, can be popularized and applied on hybrid electric vehicle.

Description

Technical Field

[0001] This utility model relates to a thermal management system for hybrid vehicles, and more particularly to an integrated thermal management system for hybrid vehicles that can make full use of engine cooling. Background Technology

[0002] With the rapid development of the global economy, green energy resources are becoming increasingly scarce. Countries are formulating effective measures to achieve carbon neutrality, and vigorously developing new energy vehicles and hybrid vehicles has become one of the important means to save energy and achieve carbon neutrality.

[0003] New energy vehicles and hybrid vehicles are increasingly emphasizing vehicle thermal management technology. Current developments in new energy vehicle thermal management systems are evolving from simple distributed three-electric-system thermal management to integrated three-electric-system thermal management, resulting in various systems with coupled thermal management of the three electrical components. Effective integrated thermal management technology can reduce energy loss caused by temperature issues. For example, operating the battery at a suitable temperature improves its charging and discharging efficiency and reduces energy loss; cooling the motor and electronic control unit can also reduce performance degradation caused by overheating, improving overall energy utilization efficiency. Simultaneously, the thermal management system is a crucial component for ensuring vehicle safety. By monitoring and controlling the temperature of the battery, motor, and electronic control unit, it can prevent safety accidents such as thermal runaway. The thermal management system can also work in conjunction with the vehicle's air conditioning system, utilizing heat generated by the battery or coolant to heat or cool the passenger compartment, improving passenger comfort. Integrated vehicle thermal management keeps the motor and battery within their optimal operating temperature range for maximum efficiency. Combined with heat pump air conditioning technology, this can further improve the vehicle's range.

[0004] However, in existing thermal management systems, the engine, battery, motor, and air conditioning are basically independent. Multiple independent thermal management systems not only have more piping and valves, but also cannot exchange heat with each other, and are relatively expensive. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by proposing an integrated thermal management system for hybrid electric vehicles. This system not only integrates the thermal management systems of the engine, battery, motor, and air conditioning, but also has a relatively low cost.

[0006] This utility model is achieved through the following technical solution: it includes an indoor refrigeration circulation pipeline, a compressor, an outdoor condenser, an indoor evaporator, a gas-liquid separator, a battery and motor cooling circulation pipeline, a heat pump circulation pipeline, a battery and heating air circulation pipeline, a motor and electronic control circulation pipeline, a heat dissipation circulation pipeline, a four-way valve, a first heat exchanger, a second heat exchanger, a battery, a heater, an indoor heating air core, a motor, a controller, a radiator, a first expansion valve, a second expansion valve, a first three-way valve, a second three-way valve, a first circulation pump, a second circulation pump, a third three-way valve, an engine, a fourth three-way valve, an engine radiator, an engine water pump, an engine circulation pipeline, a first connecting pipe, and a second connecting pipe.

[0007] The compressor, the first three-way valve, the outdoor condenser, the first expansion valve, the indoor evaporator, and the gas-liquid separator are connected in series in the indoor refrigeration circulation pipeline. The second expansion valve and the first heat exchanger are connected in series in the battery motor cooling circulation pipeline. The second heat exchanger is connected in series in the heat pump circulation pipeline. The inlet of the battery motor cooling circulation pipeline is connected to the indoor refrigeration circulation pipeline between the outdoor condenser and the first expansion valve. The outlet of the battery motor cooling circulation pipeline is connected to the indoor refrigeration circulation pipeline between the indoor evaporator and the gas-liquid separator. The two ports of the first three-way valve are connected to the indoor refrigeration circulation pipeline respectively. The third port of the first three-way valve is connected to the inlet of the heat pump circulation pipeline. The outlet of the heat pump circulation pipeline is connected to the battery motor cooling circulation pipeline before the second expansion valve.

[0008] The first circulation pump, four-way valve, second heat exchanger, indoor heating core, first heat exchanger, third three-way valve, battery, and heater are connected in series in the battery and heating circulation pipeline. The second circulation pump, second three-way valve, four-way valve, motor, and controller are connected in series in the motor and electrical control circulation pipeline. The radiator is connected in series in the heat dissipation circulation pipeline. The two ports of the second three-way valve are connected to the motor and electrical control circulation pipeline, the third port of the second three-way valve is connected to the inlet of the heat dissipation circulation pipeline, and the outlet of the heat dissipation circulation pipeline is connected to the motor and electrical control circulation pipeline between the second three-way valve and the four-way valve. The two ports of the four-way valve are connected to the battery and heating circulation pipeline, and the other two ports of the four-way valve are connected to the motor and electrical control circulation pipeline.

[0009] The engine, fourth three-way valve, engine radiator, and engine water pump are connected in series in the engine circulation pipe. The two ports of the third three-way valve are connected to the battery and the heater circulation pipe, respectively. The third port of the third three-way valve is connected to one port of the first connecting pipe. The other port of the first connecting pipe is connected to the engine circulation pipe between the engine radiator and the engine water pump. The two ports of the fourth three-way valve are connected to the engine circulation pipe, respectively. The third port of the fourth three-way valve is connected to one port of the second connecting pipe. The other port of the second connecting pipe is connected to the battery and the heater circulation pipe between the third three-way valve and the battery.

[0010] Furthermore, in this invention, the heater is a PTC heater, and both the first heat exchanger and the second heat exchanger are dual-channel plate heat exchangers.

[0011] Furthermore, in this utility model, the first three-way valve, the second three-way valve, the third three-way valve, and the fourth three-way valve are all two-position three-way valves.

[0012] Furthermore, in this invention, the first expansion valve and the second expansion valve are electronic expansion valves.

[0013] Furthermore, in this invention, the motor is a drive motor, and the controller is a motor controller.

[0014] Compared with the prior art, the advantages of this utility model are: the utility model has a reasonable design and simple structure, which can not only integrate the thermal management system of engine, battery, motor and air conditioner together, but also has a relatively low cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] The components include: 1. Indoor refrigeration circulation pipe; 2. Battery and motor cooling circulation pipe; 3. Heat pump circulation pipe; 4. Battery and heating air circulation pipe; 5. Motor and electronic control circulation pipe; 6. Heat dissipation circulation pipe; 7. Four-way valve; 8. Compressor; 9. Outdoor condenser; 10. Indoor evaporator; 11. Gas-liquid separator; 12. First heat exchanger; 14. Second heat exchanger; 15. Battery; 16. Heater; 17. Indoor heating air core; 18. Motor; 19. Controller; 20. Radiator; 22. First expansion valve; 23. Second expansion valve; 24. First three-way valve; 25. Second three-way valve; 26. First circulation pump; 27. Second circulation pump; 28. Third three-way valve; 29. ​​Engine; 30. Fourth three-way valve; 31. Engine radiator; 32. Engine water pump; 33. Engine circulation pipe; 34. First connecting pipe; 35. Second connecting pipe. Detailed Implementation

[0017] To facilitate understanding of the present invention, the technical solution is further explained below with reference to specific embodiments. These examples are for illustrative purposes only and are not limited to this scope. Example

[0018] like Figure 1 As shown, this utility model includes an indoor refrigeration circulation pipe 1, a battery and motor cooling circulation pipe 2, a heat pump circulation pipe 3, a battery and heating air circulation pipe 4, a motor and electronic control circulation pipe 5, a heat dissipation circulation pipe 6, a four-way valve 7, a compressor 8, an outdoor condenser 9, an indoor evaporator 10, a gas-liquid separator 11, a first heat exchanger 12, a second heat exchanger 14, a battery 15, a heater 16, an indoor heating air core 17, a motor 18, a controller 19, a radiator 20, a first expansion valve 22, a second expansion valve 23, a first three-way valve 24, a second three-way valve 25, a first circulation pump 26, a second circulation pump 27, a third three-way valve 28, an engine 29, a fourth three-way valve 30, an engine radiator 31, an engine water pump 32, an engine circulation pipe 33, a first connecting pipe 34, a second connecting pipe 35; a compressor 8, a first three-way valve 24, an indoor condenser 9, an outdoor condenser 10, an indoor evaporator 11, a gas-liquid separator 11, a first heat exchanger 12, a second heat exchanger 14, a battery 15, a heater 16, an indoor heating air core 17, a motor 18, a controller 19, a radiator 20, a first expansion valve 22, a second expansion valve 23, a first three-way valve 24, a second three-way valve 25, a first circulation pump 26, a second circulation pump 27, a third three-way valve 28, an engine 29, a fourth three-way valve 30, an engine radiator 31, an engine water pump 32, an engine circulation pipe 33, a first connecting pipe 34, a An external condenser 9, a first expansion valve 22, an indoor evaporator 10, and a gas-liquid separator 11 are connected in series in the indoor refrigeration circulation pipe 1. A second expansion valve 23 and a first heat exchanger 12 are connected in series in the battery-motor cooling circulation pipe 2. A second heat exchanger 14 is connected in series in the heat pump circulation pipe 3. The inlet of the battery-motor cooling circulation pipe 2 is connected to the indoor refrigeration circulation pipe 1 between the outdoor condenser 9 and the first expansion valve 22. The outlet of the battery-motor cooling circulation pipe 2 is connected to the indoor refrigeration circulation pipe 1 between the indoor evaporator 10 and the gas-liquid separator 11. The A and B ports of the first three-way valve 24 are connected to the indoor refrigeration circulation pipe 1, and the C port of the first three-way valve 24 is connected to the inlet of the heat pump circulation pipe 3. The outlet of the heat pump circulation pipe 3 is connected to the battery-motor cooling circulation pipe 2 before the second expansion valve 23.

[0019] The first circulation pump 26, four-way valve 27, second heat exchanger 14, indoor heating core 17, first heat exchanger 12, third three-way valve 28, battery 15, and heater 16 are connected in series in the battery and heating circulation pipe 4. The second circulation pump 27, second three-way valve 25, four-way valve 7, motor 18, and controller 19 are connected in series in the motor and electrical control circulation pipe 5. The radiator 20 is connected in series in the heat dissipation circulation pipe 6. The D and E ports of the second three-way valve 25 are connected to the motor and electrical control circulation pipe 5, the F port of the second three-way valve 25 is connected to the inlet of the heat dissipation circulation pipe 6, and the outlet of the heat dissipation circulation pipe 6 is connected to the motor and electrical control circulation pipe 5 between the second three-way valve 25 and the four-way valve 7. The G and H ports of the four-way valve 7 are connected to the battery and heating circulation pipe 4, and the J and K ports of the four-way valve 7 are connected to the battery and heating circulation pipe 4. One port is connected to the motor control circulation pipe 5; the engine 29, the fourth three-way valve 30, the engine radiator 31, and the engine water pump 32 are connected in series in the engine circulation pipe 33. The L and M ports of the third three-way valve 28 are connected to the battery and the heater circulation pipe 4, respectively. The N port of the third three-way valve 28 is connected to one port of the first connecting pipe 34. The other port of the first connecting pipe 34 is connected to the engine circulation pipe 33 between the engine radiator 31 and the engine water pump 32. The P and S ports of the fourth three-way valve 30 are connected to the engine circulation pipe 33, respectively. The R port of the fourth three-way valve 30 is connected to one port of the second connecting pipe 35. The other port of the second connecting pipe 35 is connected to the battery and the heater circulation pipe 4 between the third three-way valve 28 and the battery 15.

[0020] Heater 16 is a PTC heater, and the first heat exchanger 12 and the second heat exchanger 14 are both dual-channel plate heat exchangers. The first three-way valve 24, the second three-way valve 25, the third three-way valve 28, and the fourth three-way valve 30 are all two-position three-way valves. The first expansion valve 22 and the second expansion valve 23 are electronic expansion valves. Motor 18 is a drive motor, and controller 19 is a motor controller.

[0021] In the implementation of this utility model, when the engine 29 is not running and the vehicle is electrically driven, the L and M ports of the third three-way valve 28 are connected, and the L and N ports of the third three-way valve 28 are disconnected. The P and S ports of the fourth three-way valve 30 are connected, and the P and R ports of the fourth three-way valve 30 are disconnected. The main implementation conditions and control methods of each component are as follows:

[0022] Operating Condition 1: The cab requires cooling, battery 15 does not require cooling or heating, and motor 18 and controller 19 do not require heat dissipation. The A and B ports of the first three-way valve 24 are connected, while the A and C ports of the first three-way valve 24 are disconnected. The first expansion valve 22 is open, and the first expansion valve 21 and the second expansion valve 23 are closed. Compressor 8 operates, while the first circulating pump 26 and the second circulating pump 27 stop. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat within the cab.

[0023] Operating Condition 2: The cab requires cooling, battery 15 requires strong heat dissipation, and motor 18 and controller 19 require heat dissipation. The control system connects ports A and B of the first three-way valve 24, disconnects ports A and C, and opens the first expansion valve 22 and the second expansion valve 23. Ports D and F of the second three-way valve 25 are connected, disconnects ports D and E, connects ports J and K of the four-way valve 7, and connects ports G and H of the four-way valve 7. Compressor 8, the first circulating pump 26, and the second circulating pump 27 operate. The outdoor condenser 9 dissipates heat to the environment, and the indoor evaporator 10 absorbs heat in the cab. Battery 15 dissipates heat to the outside through the first heat exchanger 12, and motor 18 and controller 19 dissipate heat to the environment through radiator 20.

[0024] Condition 3: The cab requires slight heating, while battery 15, motor 18, and controller 19 require heat dissipation. The D and F ports of the second three-way valve 25 are connected, while the D and E ports are disconnected. The J and K ports of the four-way valve 7 are connected, and the G and H ports of the four-way valve 7 are connected. The first circulation pump 26 and the second circulation pump 27 operate, while compressor 8 stops. Battery 15 dissipates heat to the cab through the indoor heater core 16, and motor 18 and controller 19 dissipate heat to the environment through radiator 20. At this time, the compressor is not working, and the heat required by the cab is achieved through the heat dissipation of battery 15.

[0025] Apart from the three operating conditions mentioned above, other operating conditions will not be discussed further here.

[0026] The above embodiments are merely illustrative of the design principles and uses of this utility model, and are not intended to limit this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An integrated thermal management system for a hybrid electric vehicle, comprising an indoor cooling circulation pipeline (1), a compressor (8), an outdoor condenser (9), an indoor evaporator (10), and a gas-liquid separator (11), characterized in that, It also includes battery and motor cooling circulation pipe (2), heat pump circulation pipe (3), battery and heating air circulation pipe (4), motor and electronic control circulation pipe (5), heat dissipation circulation pipe (6), four-way valve (7), first heat exchanger (12), second heat exchanger (14), battery (15), heater (16), indoor heating air core (17), motor (18), controller (19), radiator (20), first expansion valve (22), second expansion valve (23), first three-way valve (24), second three-way valve (25), first circulation pump (26), second circulation pump (27), third three-way valve (28), engine (29), fourth three-way valve (30), engine radiator (31), engine water pump (32), engine circulation pipe (33), first connecting pipe (34), second connecting pipe (35); The compressor (8), the first three-way valve (24), the outdoor condenser (9), the first expansion valve (22), the indoor evaporator (10), and the gas-liquid separator (11) are connected in series in the indoor refrigeration circulation pipeline (1). The second expansion valve (23) and the first heat exchanger (12) are connected in series in the battery motor cooling circulation pipeline (2). The second heat exchanger (14) is connected in series in the heat pump circulation pipeline (3). The inlet of the battery motor cooling circulation pipeline (2) is connected to the outdoor condenser (9) and the first expansion valve (22). The indoor refrigeration circulation pipeline (1) is connected, and the outlet of the battery motor cooling circulation pipeline (2) is connected to the indoor refrigeration circulation pipeline (1) between the indoor evaporator (10) and the gas-liquid separator (11); the two ports of the first three-way valve (24) are connected to the indoor refrigeration circulation pipeline (1) respectively, the third port of the first three-way valve (24) is connected to the inlet of the heat pump circulation pipeline (3), and the outlet of the heat pump circulation pipeline (3) is connected to the battery motor cooling circulation pipeline (2) before the second expansion valve (23); The first circulating pump (26), four-way valve (7), second heat exchanger (14), indoor heating core (17), first heat exchanger (12), third three-way valve (28), battery (15), and heater (16) are connected in series in the battery and heating circulation pipeline (4). The second circulating pump (27), second three-way valve (25), four-way valve (7), motor (18), and controller (19) are connected in series in the motor and electrical control circulation pipeline (5). The radiator (20) is connected in series in the heat dissipation circulation pipeline (6). In the middle; the two ports of the second three-way valve (25) are connected to the motor control circulation pipeline (5) respectively, the third port of the second three-way valve (25) is connected to the inlet of the heat dissipation circulation pipeline (6), the outlet of the heat dissipation circulation pipeline (6) is connected to the motor control circulation pipeline (5) between the second three-way valve (25) and the four-way valve (7); the two ports of the four-way valve (7) are connected to the battery and the warm air circulation pipeline (4), and the other two ports of the four-way valve (7) are connected to the motor control circulation pipeline (5); The engine (29), the fourth three-way valve (30), the engine radiator (31), and the engine water pump (32) are connected in series in the engine circulation pipe (33). The two ports of the third three-way valve (28) are connected to the battery and the heater circulation pipe (4) respectively. The third port of the third three-way valve (28) is connected to one port of the first connecting pipe (34). The other port of the first connecting pipe (34) is connected to the engine circulation pipe (33) between the engine radiator (31) and the engine water pump (32). The two ports of the fourth three-way valve (30) are connected to the engine circulation pipe (33) respectively. The third port of the fourth three-way valve (30) is connected to one port of the second connecting pipe (35). The other port of the second connecting pipe (35) is connected to the battery and the heater circulation pipe (4) between the third three-way valve (28) and the battery (15).

2. The integrated thermal management system for hybrid electric vehicles according to claim 1, characterized in that... The heater (16) is a PTC heater, and the first heat exchanger (12) and the second heat exchanger (14) are both dual-channel plate heat exchangers.

3. The integrated thermal management system for hybrid electric vehicles according to claim 1, characterized in that... The first three-way valve (24), the second three-way valve (25), the third three-way valve (28), and the fourth three-way valve (30) are all two-position three-way valves.

4. The integrated thermal management system for hybrid electric vehicles according to claim 1, characterized in that... The first expansion valve (22) and the second expansion valve (23) are electronic expansion valves.

5. The integrated thermal management system for hybrid electric vehicles according to claim 1, characterized in that... The motor (18) is a drive motor, and the controller (19) is a motor controller.

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