Integrated thermal management system of new energy vehicle
By designing an integrated thermal management system in new energy vehicles, using motor heat dissipation to improve heat pump efficiency, and using a simple valve structure to replace multi-way valves, the problems of high power consumption of air conditioners and system complexity in low-temperature environments are solved, and efficient thermal management and safety improvement are achieved.
Patent Information
- Application Number
- CN202410741927.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-28
AI Technical Summary
At lower ambient temperatures, the air conditioning power consumption of the thermal management system of new energy vehicles is high, resulting in the attenuation of the vehicle's endurance. The multi-way valve system is complex in structure, and the fault location and maintenance are difficult, which poses safety hazards.
An integrated thermal management system for new energy vehicles was designed to improve the efficiency of the heat pump system by using motor heat dissipation, and replace the multi-way valve with a simple three-way valve and four-way valve structure to simplify the system structure.
The efficiency of the heat pump system is improved in low temperature environments, avoid frost in outdoor heat exchangers, reduce the probability of safety accidents, and simplify the system structure and fault location.
Smart Images
Figure CN119704979A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a thermal management system for a new energy vehicle, and in particular to an integrated thermal management system for a new energy vehicle that can fully utilize the heat dissipation of a motor. Background Art
[0002] With the rapid development of the global economy, green energy resources are becoming scarce. Countries have formulated effective measures for the goal of carbon neutrality, and vigorously developing new energy vehicles (including passenger cars, commercial vehicles, engineering vehicles, etc.) has also become one of the important means to save energy and achieve carbon neutrality.
[0003] New energy vehicles are paying more and more attention to vehicle thermal management technology. The current technical development of thermal management systems for new energy vehicles has evolved from simple distributed three-electric thermal management to integrated three-electric thermal management, and a variety of three-electric thermal coupling systems have been developed. Through effective integrated thermal management technology, energy loss caused by temperature problems can be reduced. For example, batteries working at a suitable temperature can improve their charging and discharging efficiency and reduce energy loss; cooling of motors and electronic control units can also reduce performance degradation caused by overheating and improve overall energy utilization efficiency. At the same time, the thermal management system of new energy vehicles is an important part of ensuring vehicle safety. By monitoring and controlling the temperature of batteries, motors and electronic control units, safety accidents such as thermal runaway can be prevented. The thermal management system can also work in conjunction with the vehicle's air conditioning system, using the heat or coolant generated by the battery to heat or cool the passenger compartment to improve passenger comfort. Through vehicle integrated thermal management, the motor and battery can be kept in the optimal operating temperature range with the highest efficiency. Combined with heat pump air conditioning technology, the vehicle's endurance can be further improved.
[0004] However, at lower ambient temperatures, even if new energy vehicles use heat pump technology to absorb heat from the environment, the air conditioning power consumption is still high, which further increases the vehicle's endurance degradation. When the ambient temperature is below a certain level, such as -10°C, some thermal management systems can only use electric heaters for heating, and the compressor cannot be started due to the low ambient temperature. At this time, the endurance degradation is more serious. At the same time, many existing integrated thermal management technologies use eight-way valves, ten-way valves, and even twelve-way valves to integrate the vehicle's thermal management circuit, but the more valve ports a multi-way valve has, the more complex the system structure will be; on the other hand, since all thermal management lines are integrated / connected to the multi-way valve, the multi-way valve becomes the "hub" of the vehicle's thermal management system. Once the eight-way valve, ten-way valve, or twelve-way valve fails, not only is the difficulty of fault location and repair very high, but it can also sometimes lead to safety accidents. Summary of the invention
[0005] In view of the deficiencies in the prior art, the present invention proposes an integrated thermal management system for new energy vehicles, which not only utilizes the heat dissipation of the motor to make the heat pump system more efficient, but also uses only simple three-way valves and four-way valves as control valves, with simple structure and complete functions.
[0006] The present invention is realized by the following technical scheme, which includes an indoor refrigeration circulation pipeline, a compressor, an outdoor condenser, an indoor evaporator, a gas-liquid separator, a battery cooling circulation pipeline, a heat pump circulation pipeline, a warm air circulation pipeline, a battery circulation pipeline, a motor electronic control circulation pipeline, a heat dissipation circulation pipeline, a first four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, an indoor warm air core, a battery, a heater, a motor, a controller, a radiator, a first expansion valve, a second expansion valve, a third expansion valve, a first three-way valve, a second three-way valve, a second four-way valve, a first circulation pump, a second circulation pump, and a third circulation pump; a compressor, a first three-way valve, an outdoor condenser, a second expansion valve ... gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas-liquid separator, a gas- The first heat exchanger is connected in series in the indoor refrigeration circulation pipeline, the third expansion valve and the first heat exchanger are connected in series in the battery cooling circulation pipeline, the second heat exchanger, the first expansion valve and the third heat exchanger are connected in series in the heat pump circulation pipeline; the two ports of the first three-way valve are respectively connected to the indoor refrigeration circulation pipeline, the third port of the first three-way valve is connected to the inlet of the heat pump circulation pipeline, and the outlet of the heat pump circulation pipeline is connected to the indoor refrigeration circulation pipeline between the indoor evaporator and the gas-liquid separator; the inlet of the battery cooling circulation pipeline is connected to the indoor refrigeration circulation pipeline between the outdoor condenser and the second expansion valve, and the outlet of the battery cooling circulation pipeline is connected to the indoor refrigeration circulation pipeline between the indoor evaporator and the gas-liquid separator. The first circulation pump, the indoor heating core, the first four-way valve, and the second heat exchanger are connected in series in the heating circulation pipeline in sequence; the second circulation pump, the second four-way valve, the first four-way valve, the first heat exchanger, the battery, and the heater are connected in series in the battery circulation pipeline in sequence; the third circulation pump, the second three-way valve, the third heat exchanger, the second four-way valve, the motor, and the controller are connected in series in the motor electronic control circulation pipeline in sequence; and the radiator is connected in series in the heat dissipation circulation pipeline; the two ports of the second three-way valve are respectively connected to the motor electronic 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 electronic control circulation pipeline between the second four-way valve and the third heat exchanger; the two ports of the first four-way valve are connected to the heating circulation pipeline, the other two ports of the first four-way valve are connected to the battery circulation pipeline, the two ports of the second four-way valve are connected to the battery circulation pipeline, and the other two ports of the second four-way valve are connected to the motor electronic control circulation pipeline.
[0007] Furthermore, in the present invention, the heater is a PTC heater, and the first heat exchanger, the second heat exchanger, and the third heat exchanger are all double-channel plate heat exchangers.
[0008] Furthermore, in the present invention, the first three-way valve and the second three-way valve are both two-position three-way valves.
[0009] Furthermore, in the present invention, the first expansion valve is a thermal expansion valve or an electronic expansion valve, the second expansion valve is a thermal expansion valve or an electronic expansion valve, and the third expansion valve is an electronic expansion valve.
[0010] Furthermore, in the present invention, when the third expansion valve is a thermal expansion valve, the integrated thermal management system further includes a solenoid valve, which is connected in series in the battery cooling circulation pipeline and is located upstream of the third expansion valve. The solenoid valve is used to control the on-off of the circulating medium in the battery cooling circulation pipeline. If there is no solenoid valve, when the third expansion valve is a thermal expansion valve, the third expansion valve will always be in an open state when the compressor is in working state.
[0011] Furthermore, in the present invention, the motor is a drive motor and the controller is a motor controller.
[0012] Furthermore, the present invention also includes a generator, which is connected in series in the motor electronic control circulation pipeline and is located between the motor and the controller.
[0013] Furthermore, in the present invention, the functions of the first four-way valve and the second four-way valve are realized by a six-way valve, two ports of the six-way valve are connected to the warm air circulation pipeline, the other two ports of the six-way valve are connected to the battery circulation pipeline, and the other two ports of the six-way valve are connected to the motor electronic control circulation pipeline; the first circulation pump, the indoor warm air core, the six-way valve, and the second heat exchanger are connected in series in the warm air circulation pipeline in sequence, the second circulation pump, the six-way valve, the first heat exchanger, the battery, and the heater are connected in series in the battery circulation pipeline in sequence, and the third circulation pump, the second three-way valve, the third heat exchanger, the six-way valve, the motor, and the controller are connected in series in the motor electronic control circulation pipeline in sequence.
[0014] Furthermore, in the present invention, the function of the first three-way valve is realized by the first two-way valve and the second two-way valve. The first two-way valve is connected in series in the indoor refrigeration circulation pipeline and is located between the compressor and the outdoor condenser. The second two-way valve is connected in series in the heat pump circulation pipeline and is located upstream of the second heat exchanger. The inlet of the heat pump circulation pipeline is connected to the indoor refrigeration circulation pipeline between the compressor and the first two-way valve; the function of the second three-way valve is realized by the third two-way valve and the fourth two-way valve. The third two-way valve is connected in series in the motor electronic control circulation pipeline and is located between the third circulation pump and the third heat exchanger. The fourth two-way valve is connected in series in the heat dissipation circulation pipeline and is located upstream of the radiator. The inlet of the heat dissipation circulation pipeline is connected to the motor electronic control circulation pipeline between the third circulation pump and the third two-way valve.
[0015] Furthermore, in the present invention, the functions of the first four-way valve and the second four-way valve are realized by multiple three-way valves or two-way valves, and the function of the four-way valve is realized by the cooperation of multiple three-way valves or two-way valves.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention has a reasonable design and a simple structure, which can not only make the heat pump system more efficient when the ambient temperature is low and effectively avoid frosting of the outdoor heat exchanger; but also the relevant control valves in the entire system only use two three-way valves and one four-way valve, without using more complex multi-way valves, which can reduce the probability of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;
[0018] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;
[0019] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present invention;
[0020] Among them, 1. Indoor refrigeration circulation pipeline, 2. Battery cooling circulation pipeline, 3. Heat pump circulation pipeline, 4. Warm air circulation pipeline, 5. Battery circulation pipeline, 6. Motor electronic control circulation pipeline, 7. Heat dissipation circulation pipeline, 8. First four-way valve, 9. Compressor, 10. Outdoor condenser, 11. Indoor evaporator, 12. Gas-liquid separator, 13. First heat exchanger, 14. Second heat exchanger, 15. Third heat exchanger, 16. Indoor warm air core, 17. Battery, 18. Heater, 19. Motor, 20. Controller, 21. Radiator, 22. First Expansion Valve, 23. Second Expansion Valve, 24. Third Expansion Valve, 25. First Three-Way Valve, 26. Second Three-Way Valve, 27. Second Four-Way Valve, 28. First Circulation Pump, 29. Second Circulation Pump, 30. Third Circulation Pump, 31. Six-Way Valve, 32. First Two-Way Valve, 33. Second Two-Way Valve, 34. Third Two-Way Valve, 35. Fourth Two-Way Valve. DETAILED DESCRIPTION
[0021] In order to make the contents of the present invention easier to understand, the technical scheme of the present invention is further explained below in conjunction with specific embodiments. The examples are only used to illustrate the present invention, but the present invention is not limited to the contents. The operation methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or according to the product instructions. The chemical reagents without specifying the manufacturer are all conventional drugs that comply with national standards and can be purchased on the market.
[0022] Embodiment 1
[0023] like Figure 1As shown, the present invention includes an indoor refrigeration circulation pipeline 1, a battery cooling circulation pipeline 2, a heat pump circulation pipeline 3, a warm air circulation pipeline 4, a battery circulation pipeline 5, a motor electronic control circulation pipeline 6, a heat dissipation circulation pipeline 7, a first four-way valve 8, a compressor 9, an outdoor condenser 10, an indoor evaporator 11, a gas-liquid separator 12, a first heat exchanger 13, a second heat exchanger 14, a third heat exchanger 15, an indoor warm air core 16, a battery 17, a heater 18, a motor 19, a controller 20, a radiator 21, a first expansion valve 22, a second expansion valve 23, a third expansion valve 24, a first three-way valve 25, a second three-way valve 26, a second four-way valve 27, a first circulation pump 28, a second circulation pump 29, and a third circulation pump 30. The compressor 9, the first three-way valve 25, the outdoor condenser 10, the second expansion valve 23, the indoor evaporator 11, and the gas-liquid separator 12 are connected in series in the indoor refrigeration circulation pipeline 1 in sequence, the third expansion valve 24 and the first heat exchanger 13 are connected in series in the battery cooling circulation pipeline 2 in sequence, and the second heat exchanger 14, the first expansion valve 22, and the third heat exchanger 15 are connected in series in the heat pump circulation pipeline 3 in sequence; the A and B ports of the first three-way valve 25 are respectively connected to the indoor refrigeration circulation pipeline 1, the C port of the first three-way valve 25 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 indoor refrigeration circulation pipeline 1 between the indoor evaporator 11 and the gas-liquid separator 12; the inlet of the battery cooling circulation pipeline 2 is connected to the indoor refrigeration circulation pipeline 1 between the outdoor condenser 10 and the second expansion valve 23, and the outlet of the battery cooling circulation pipeline 2 is connected to the indoor refrigeration circulation pipeline 1 between the indoor evaporator 11 and the gas-liquid separator 12. The first circulation pump 28, the indoor heating core 16, the first four-way valve 8, and the second heat exchanger 14 are connected in series in the heating circulation pipeline 4 in sequence; the second circulation pump 29, the second four-way valve 27, the first four-way valve 8, the first heat exchanger 13, the battery 17, and the heater 18 are connected in series in the battery circulation pipeline 5 in sequence; the third circulation pump 30, the second three-way valve 26, the third heat exchanger 15, the second four-way valve 27, the motor 19, and the controller 20 are connected in series in the motor electronic control circulation pipeline 6 in sequence; the radiator 21 is connected in series in the heat dissipation circulation pipeline 7; the D and E terminals of the second three-way valve 26 are connected in series in sequence; The ports are respectively connected to the motor electronic control circulation pipeline 6, the F port of the second three-way valve 26 is connected to the inlet of the heat dissipation circulation pipeline 7, and the outlet of the heat dissipation circulation pipeline 7 is connected to the motor electronic control circulation pipeline 6 between the second four-way valve 27 and the third heat exchanger 15; the G and H ports of the first four-way valve 8 are connected to the warm air circulation pipeline 4, the J and K ports of the first four-way valve 8 are connected to the battery circulation pipeline 5, the N and P ports of the second four-way valve 27 are connected to the battery circulation pipeline 5, and the L and M ports of the second four-way valve 27 are connected to the motor electronic control circulation pipeline 6.The heater 18 is a PTC heater, the first heat exchanger 13, the second heat exchanger 14, and the third heat exchanger 15 are all double-channel plate heat exchangers, the first three-way valve 25 and the second three-way valve 26 are both two-position three-way valves, and the first expansion valve 22, the second expansion valve 23, and the third expansion valve 24 are all electronic expansion valves.
[0024] During the implementation of the present invention, the main implementation conditions and control methods of each component are as follows:
[0025] Working condition 1: The cab needs to be cooled, the battery 17 does not need to be cooled or heated, and the motor 19 and the controller 20 do not need to dissipate heat
[0026] The A and B ports of the first three-way valve 25 are controlled to be connected, the A and C ports of the first three-way valve 25 are isolated, the second expansion valve 23 is opened, the first expansion valve 22 and the third expansion valve 24 are closed; the compressor 9 is operated, and the first circulation pump 28, the second circulation pump 29 and the third circulation pump 30 are stopped. The outdoor condenser 10 dissipates heat to the environment, and the indoor evaporator 11 absorbs heat in the cab.
[0027] Working condition 2: The cab needs to be cooled, the battery 17 needs to be kept warm, and the motor 19 and the controller 20 need to be cooled
[0028] The A and B ports of the first three-way valve 25 are controlled to be connected, the A and C ports of the first three-way valve 25 are blocked, the second expansion valve 23 is opened, and the first expansion valve 22 and the third expansion valve 24 are closed; the D and F ports of the second three-way valve 26 are connected, the D and E ports of the second three-way valve 26 are blocked, the G and H ports of the first four-way valve 8 are connected, the J and K ports of the first four-way valve 8 are connected, the N and P ports of the second four-way valve 27 are connected, and the L and M ports of the second four-way valve 27 are connected; the compressor 9, the second circulation pump 29, and the third circulation pump 30 are operated, and the first circulation pump 28 is stopped. The outdoor condenser 10 dissipates heat to the environment, and the indoor evaporator 11 absorbs heat in the cab; the motor 19 and the controller 20 dissipate heat to the environment through the radiator 21, and the coolant in the battery circulation pipeline 5 circulates itself.
[0029] Working condition 3: The cab needs to be cooled, and the battery 17, motor 19, and controller 20 need to be cooled
[0030] The A and B ports of the first three-way valve 25 are controlled to be connected, the A and C ports of the first three-way valve 25 are blocked, the second expansion valve 23 is opened, and the first expansion valve 22 and the third expansion valve 24 are closed; the D and F ports of the second three-way valve 26 are connected, the D and E ports of the second three-way valve 26 are blocked, the G and H ports of the first four-way valve 8 are connected, the J and K ports of the first four-way valve 8 are connected, the L and N ports of the second four-way valve 27 are connected, and the M and P ports of the second four-way valve 27 are connected; the compressor 9, the second circulation pump 29, and the third circulation pump 30 are operated, and the first circulation pump 28 is stopped. The outdoor condenser 10 dissipates heat to the environment, and the indoor evaporator 11 absorbs heat in the cab; the battery circulation pipeline 5, the motor electronic control circulation pipeline 6, and the heat dissipation circulation pipeline 7 are connected together, and the battery 17, the motor 19, and the controller 20 dissipate heat to the environment through the radiator 21.
[0031] Working condition 4: The cab needs to be cooled, the battery 17 needs strong heat dissipation, and the motor 19 and the controller 20 need heat dissipation
[0032] The A and B ports of the first three-way valve 25 are controlled to be connected, the A and C ports of the first three-way valve 25 are blocked, the second expansion valve 23 and the third expansion valve 24 are opened, and the first expansion valve 22 is closed; the D and F ports of the second three-way valve 26 are connected, the D and E ports of the second three-way valve 26 are blocked, the G and H ports of the first four-way valve 8 are connected, the J and K ports of the first four-way valve 8 are connected, the L and M ports of the second four-way valve 27 are connected, and the N and P ports of the second four-way valve 27 are connected; the compressor 9, the second circulating pump 29, and the third circulating pump 30 are operated, and the first circulating pump 28 is stopped. The outdoor condenser 10 dissipates heat to the environment, and the indoor evaporator 11 absorbs heat in the cab; the battery 17 dissipates heat to the outside through the first heat exchanger 13, and the motor 19 and the controller 20 dissipate heat to the environment through the radiator 21.
[0033] Working condition 5: The cab needs to be cooled, and the battery 17, motor 19, and controller 20 need strong heat dissipation
[0034] The A and B ports of the first three-way valve 25 are controlled to be connected, the A and C ports of the first three-way valve 25 are blocked, the second expansion valve 23 and the third expansion valve 24 are opened, and the first expansion valve 22 is closed; the D and F ports of the second three-way valve 26 are connected, the D and E ports of the second three-way valve 26 are blocked, the G and H ports of the first four-way valve 8 are connected, the J and K ports of the first four-way valve 8 are connected, the L and N ports of the second four-way valve 27 are connected, and the M and P ports of the second four-way valve 27 are connected; the compressor 9, the second circulation pump 29, and the third circulation pump 30 are operated, and the first circulation pump 28 is stopped. The outdoor condenser 10 dissipates heat to the environment, and the indoor evaporator 11 absorbs heat in the cab; the battery circulation pipeline 5, the motor electronic control circulation pipeline 6, and the heat dissipation circulation pipeline 7 are connected together, and the battery 17, the motor 19, and the controller 20 dissipate heat to the outside through the first heat exchanger 13 and the radiator 21 at the same time.
[0035] Working condition 6: The cab needs to be slightly heated, and the battery 17, motor 19, and controller 20 need to be cooled
[0036] The D and F ports of the second three-way valve 26 are controlled to be connected, the D and E ports of the second three-way valve 26 are isolated, the G and J ports of the first four-way valve 8 are connected, the H and K ports of the first four-way valve 8 are connected, the L and M ports of the second four-way valve 27 are connected, and the N and P ports of the second four-way valve 27 are connected; the first circulation pump 28, the second circulation pump 29, and the third circulation pump 30 are in operation, and the compressor 9 is stopped. The warm air circulation pipeline 4 and the battery circulation pipeline 5 are connected together, the battery 17 dissipates heat to the cab through the indoor warm air core 16, and the motor 19 and the controller 20 dissipate heat to the environment through the radiator 21. At this time, the compressor does not work, and the heat required by the cab is achieved by the heat dissipation of the battery 17.
[0037] Working condition 7: The cab needs to be heated, and the battery 17, motor 19, and controller 20 need to be cooled
[0038] The D and E ports of the second three-way valve 26 are controlled to be connected, the D and F ports of the second three-way valve 26 are isolated, the G and J ports of the first four-way valve 8 are connected, the H and K ports of the first four-way valve 8 are connected, the L and N ports of the second four-way valve 27 are connected, and the M and P ports of the second four-way valve 27 are connected; the first circulation pump 28, the second circulation pump 29, and the third circulation pump 30 are operated, and the compressor 9 is stopped. The warm air circulation pipeline 4, the battery circulation pipeline 5, and the motor electronic control circulation pipeline 6 are connected together, and the battery 17, the motor 19, and the controller 20 dissipate heat to the cab through the indoor warm air core 16.
[0039] Working condition 8: The cab needs strong heating, the battery 17 needs to be heated, and the motor 19 and the controller 20 need to be cooled
[0040] The A and C ports of the first three-way valve 25 are controlled to be connected, the A and B ports of the first three-way valve 25 are blocked, the first expansion valve 22 is opened, and the second expansion valve 23 and the third expansion valve 24 are closed; the D and E ports of the second three-way valve 26 are connected, the D and F ports of the second three-way valve 26 are blocked, the G and J ports of the first four-way valve 8 are connected, the H and K ports of the first four-way valve 8 are connected, the L and M ports of the second four-way valve 27 are connected, and the N and P ports of the second four-way valve 27 are connected; the compressor 9, the first circulation pump 28, the second circulation pump 29, and the third circulation pump 30 are operated. The warm air circulation pipeline 4 and the battery circulation pipeline 5 are connected in series, and the heat pump air conditioning system transfers heat to the warm air circulation pipeline 4 and the battery circulation pipeline 5 through the second heat exchanger 14, so that the indoor warm air core 16 dissipates heat into the cab, and the battery 17 is heated; the motor 19 and the controller 20 dissipate heat to the outside through the third heat exchanger 15. The heat pump air conditioning system absorbs the heat of the motor 19 and the controller 20 through the third heat exchanger 15, thereby improving the working efficiency of the compressor 9 in a low temperature environment; at the same time, it does not directly absorb the heat of the environment through the radiator 21, which can effectively prevent the radiator 21 from frosting in a low temperature environment.
[0041] If the heat required by the cab and the battery 17 is not enough at this time, the heater 18 is turned on to provide heat to the cab and the battery 17 through the heater 18.
[0042] Working condition 9: The cab needs strong heating, and the battery 17, motor 19, and controller 20 need to be cooled
[0043] The A and C ports of the first three-way valve 25 are controlled to be connected, the A and B ports of the first three-way valve 25 are blocked, the first expansion valve 22 is opened, and the second expansion valve 23 and the third expansion valve 24 are closed; the D and E ports of the second three-way valve 26 are connected, the D and F ports of the second three-way valve 26 are blocked, the G and H ports of the first four-way valve 8 are connected, the J and K ports of the first four-way valve 8 are connected, the L and N ports of the second four-way valve 27 are connected, and the M and P ports of the second four-way valve 27 are connected; the compressor 9, the first circulation pump 28, the second circulation pump 29, and the third circulation pump 30 are operated. The heat pump air conditioning system transfers heat to the warm air circulation pipeline 4 through the second heat exchanger 14, and the indoor warm air core 16 dissipates heat into the cab; the battery circulation pipeline 5 and the motor electronic control circulation pipeline 6 are connected together, and the battery 17, the motor 19, and the controller 20 dissipate heat to the outside through the third heat exchanger 15. The heat pump system absorbs heat from the battery 17 , the motor 19 , and the controller 20 , thereby improving the working efficiency of the compressor 9 in a low-temperature environment.
[0044] Working condition 10: Dehumidification is required in the cab
[0045] The A and B ports of the first three-way valve 25 are controlled to be connected, the A and C ports of the first three-way valve 25 are blocked, the second expansion valve 23 is opened, and the first expansion valve 22 and the third expansion valve 24 are closed; the D and F ports of the second three-way valve 26 are connected, the D and E ports of the second three-way valve 26 are blocked, the G and J ports of the first four-way valve 8 are connected, the H and K ports of the first four-way valve 8 are connected, the L and M ports of the second four-way valve 27 are connected, and the N and P ports of the second four-way valve 27 are connected; the compressor 9, the first circulation pump 28, the second circulation pump 29, and the third circulation pump 30 are operated. The warm air circulation pipeline 4 and the battery circulation pipeline 5 are connected together, and the battery 17 dissipates heat to the cab through the indoor warm air core 16. The gas entering the cab is first cooled and dehydrated by the indoor evaporator 11, and then heated by the indoor warm air core 16, so as to achieve the purpose of dehumidification. The motor 19 and the controller 20 dissipate heat to the outside through the radiator 21.
[0046] If the heat dissipated by the battery 17 is insufficient to supply heat to the indoor heater core 16, the D and E ports of the second three-way valve 26 are controlled to be connected, the D and F ports of the second three-way valve 26 are isolated, the G and J ports of the first four-way valve 8 are connected, the H and K ports of the first four-way valve 8 are connected, the L and N ports of the second four-way valve 27 are connected, the M and P ports of the second four-way valve 27 are connected, the warm air circulation pipeline 4, the battery circulation pipeline 5, and the motor electronic control circulation pipeline 6 are connected together, and the warm air core 16 heats the cab by absorbing the heat dissipated by the battery 17, the motor 19, and the controller 20; if it is still insufficient, the heater 18 is turned on.
[0047] The above are only the working principles of ten main operating conditions. In addition, there are other operating conditions, and the relevant principles will not be stated here one by one.
[0048] Embodiment 2
[0049] In this embodiment, the first four-way valve 8 and the second four-way valve 27 in Embodiment 1 are replaced by a six-way valve 31, two ports of the six-way valve 31 are connected to the warm air circulation pipeline 4, the other two ports of the six-way valve 31 are connected to the battery circulation pipeline 5, and the other two ports of the six-way valve 31 are connected to the motor electronic control circulation pipeline 6; the first circulation pump 28, the indoor warm air core 16, the six-way valve 31, and the second heat exchanger 14 are connected in series in the warm air circulation pipeline 4 in sequence, the second circulation pump 29, the six-way valve 31, the first heat exchanger 13, the battery 17, and the heater 18 are connected in series in the battery circulation pipeline 5 in sequence, and the third circulation pump 30, the second three-way valve 26, the third heat exchanger 15, the six-way valve 31, the motor 19, and the controller 20 are connected in series in the motor electronic control circulation pipeline 6 in sequence.
[0050] During implementation, for example, when the cab needs strong heating and the battery 17, motor 19, and controller 20 need to dissipate heat, the A and C ports of the first three-way valve 25 are controlled to be connected, the A and B ports of the first three-way valve 25 are isolated, the first expansion valve 22 is opened, and the second expansion valve 23 and the third expansion valve 24 are closed; the D and E ports of the second three-way valve 26 are connected, the D and F ports of the second three-way valve 26 are isolated, the Q and R ports of the six-way valve 31 are connected, the W and S ports of the six-way valve 31 are connected, and the V and T ports of the six-way valve 31 are connected; the compressor 9, the first circulation pump 28, the second circulation pump 29, and the third circulation pump 30 are operated. The heat pump air conditioning system transfers heat to the warm air circulation pipeline 4 through the second heat exchanger 14, and the indoor warm air core 16 dissipates heat into the cab; the battery circulation pipeline 5 and the motor electronic control circulation pipeline 6 are connected together, and the battery 17, the motor 19, and the controller 20 dissipate heat to the outside through the third heat exchanger 15.
[0051] The implementation methods for other working conditions are similar to those exemplified in the first embodiment and will not be described here.
[0052] Embodiment 3
[0053] In this embodiment, the first three-way valve 25 in the first embodiment is replaced by a first two-way valve 32 and a second two-way valve 33. The first two-way valve 32 is connected in series in the indoor refrigeration circulation pipeline 1 and is located between the compressor 9 and the outdoor condenser 10. The second two-way valve 33 is connected in series in the heat pump circulation pipeline 3 and is located upstream of the second heat exchanger 14. The inlet of the heat pump circulation pipeline 3 is connected to the indoor refrigeration circulation pipeline 1 between the compressor 9 and the first two-way valve 32; the second three-way valve 26 is replaced by a third two-way valve 34 and a fourth two-way valve 35. The third two-way valve 34 is connected in series in the motor electronic control circulation pipeline 6 and is located between the third circulation pump 30 and the third heat exchanger 15. The fourth two-way valve 35 is connected in series in the heat dissipation circulation pipeline 7 and is located upstream of the radiator 21. The inlet of the heat dissipation circulation pipeline 7 is connected to the motor electronic control circulation pipeline 6 between the third circulation pump 30 and the third two-way valve 35.
[0054] By switching the first two-way valve 32, the second two-way valve 33, the third two-way valve 34, and the fourth two-way valve 35, the circulation pipelines can be turned on and off, thereby realizing the operation of various working conditions in Example 1, and the control method of the relevant components will not be described here.
[0055] Similarly, the functions of the first four-way valve 8 and the second four-way valve 27 can also be achieved by connecting multiple two-way valves or three-way valves and related pipelines.
[0056] The above embodiments are merely illustrative of the design principles and uses of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.
Claims
1. An integrated thermal management system for a new energy vehicle, comprising an indoor refrigeration cycle pipeline (1), a compressor (9), an outdoor condenser (10), an indoor evaporator (11), and a gas-liquid separator (12), characterized in that: It also includes a battery cooling circulation pipeline (2), a heat pump circulation pipeline (3), a warm air circulation pipeline (4), a battery circulation pipeline (5), a motor electronic control circulation pipeline (6), a heat dissipation circulation pipeline (7), a first four-way valve (8), a first heat exchanger (13), a second heat exchanger (14), a third heat exchanger (15), an indoor warm air core (16), a battery (17), a heater (18), a motor (19), a controller (20), a radiator (21), a first expansion valve (22), a second expansion valve (23), a third expansion valve (24), a first three-way valve (25), a second three-way valve (26), a second four-way valve (27), a first circulation pump (28), a second circulation pump (29), and a third circulation pump (30); The compressor (9), the first three-way valve (25), the outdoor condenser (10), the second expansion valve (23), the indoor evaporator (11), and the gas-liquid separator (12) are sequentially connected in series in the indoor refrigeration circulation pipeline (1); the third expansion valve (24) and the first heat exchanger (13) are sequentially connected in series in the battery cooling circulation pipeline (2); the second heat exchanger (14), the first expansion valve (22), and the third heat exchanger (15) are sequentially connected in series in the heat pump circulation pipeline (3); two ports of the first three-way valve (25) are respectively connected to the indoor refrigeration circulation pipeline (1). The third port of the first three-way valve (25) 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 indoor refrigeration circulation pipeline (1) between the indoor evaporator (11) and the gas-liquid separator (12); the inlet of the battery cooling circulation pipeline (2) is connected to the indoor refrigeration circulation pipeline (2) between the outdoor condenser (10) and the second expansion valve (23), and the outlet of the battery cooling circulation pipeline (2) is connected to the indoor refrigeration circulation pipeline (1) between the indoor evaporator (11) and the gas-liquid separator (12); The first circulation pump (28), the indoor heating core (16), the first four-way valve (8), and the second heat exchanger (14) are connected in series in the heating circulation pipeline (4); the second circulation pump (29), the second four-way valve (27), the first four-way valve (8), the first heat exchanger (13), the battery (17), and the heater (18) are connected in series in the battery circulation pipeline (5); the third circulation pump (30), the second three-way valve (26), the third heat exchanger (15), the second four-way valve (27), the motor (19), and the controller (20) are connected in series in the motor electronic control circulation pipeline (6); and the radiator (21) is connected in series in the heat dissipation circulation pipeline (7); the second three-way valve The two ports of the second three-way valve (26) are respectively connected to the motor electronic control circulation pipeline (6), the third port of the second three-way valve (26) is connected to the inlet of the heat dissipation circulation pipeline (7), and the outlet of the heat dissipation circulation pipeline (7) is connected to the motor electronic control circulation pipeline (6) between the second four-way valve (27) and the third heat exchanger (15); the two ports of the first four-way valve (8) are connected to the warm air circulation pipeline (4), the other two ports of the first four-way valve (8) are connected to the battery circulation pipeline (5), the two ports of the second four-way valve (27) are connected to the battery circulation pipeline (5), and the other two ports of the second four-way valve (27) are connected to the motor electronic control circulation pipeline (6).
2. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The heater (18) is a PTC heater, and the first heat exchanger (13), the second heat exchanger (14), and the third heat exchanger (15) are all double-channel plate heat exchangers.
3. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The first three-way valve (25) and the second three-way valve (26) are both two-position three-way valves.
4. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The first expansion valve (22) is a thermal expansion valve or an electronic expansion valve, the second expansion valve (23) is a thermal expansion valve or an electronic expansion valve, and the third expansion valve (24) is an electronic expansion valve.
5. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The third expansion valve (24) is a thermal expansion valve, and the integrated thermal management system further comprises a solenoid valve, which is connected in series in the battery cooling circulation pipeline (2) and is located upstream of the third expansion valve (24).
6. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The motor (19) is a driving motor, and the controller (20) is a motor controller.
7. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that It also includes a generator, which is connected in series in the motor electronic control circulation pipeline (6) and is located between the motor (19) and the controller (20).
8. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The first four-way valve (8) and the second four-way valve (27) are replaced by a six-way valve (31); two ports of the six-way valve (31) are connected to the warm air circulation pipeline (4); the other two ports of the six-way valve (31) are connected to the battery circulation pipeline (5); and the other two ports of the six-way valve (31) are connected to the motor electronic control circulation pipeline (6); the first circulation pump (28), the indoor warm air core (16), the six-way valve (31), and the second heat exchanger (14) are connected in series in the warm air circulation pipeline (4); the second circulation pump (29), the six-way valve (31), the first heat exchanger (13), the battery (17), and the heater (18) are connected in series in the battery circulation pipeline (5); and the third circulation pump (30), the second three-way valve (26), the third heat exchanger (15), the six-way valve (31), the motor (19), and the controller (20) are connected in series in the motor electronic control circulation pipeline (6).
9. The integrated thermal management system for new energy vehicles according to claim 1 is characterized in that The first three-way valve (25) is replaced by a first two-way valve (32) and a second two-way valve (33); the first two-way valve (32) is connected in series in the indoor refrigeration circulation pipeline (1) and is located between the compressor (9) and the outdoor condenser (10); the second two-way valve (33) is connected in series in the heat pump circulation pipeline (3) and is located upstream of the second heat exchanger (14); the inlet of the heat pump circulation pipeline (3) is connected to the indoor refrigeration circulation pipeline (1) between the compressor (9) and the first two-way valve (32); The two-way and three-way valves (26) are replaced by a third two-way valve (34) and a fourth two-way valve (35); the third two-way valve (34) is connected in series to the motor electronic control circulation pipeline (6) and is located between the third circulation pump (30) and the third heat exchanger (15); the fourth two-way valve (35) is connected in series to the heat dissipation circulation pipeline (7) and is located upstream of the radiator (21); the inlet of the heat dissipation circulation pipeline (7) is connected to the motor electronic control circulation pipeline (6) between the third circulation pump (30) and the third two-way valve (35).
10. The integrated thermal management system for new energy vehicles according to claim 1, characterized in that The first four-way valve (8) and the second four-way valve (27) are replaced by a plurality of three-way valves or two-way valves.