Inlet air cooling system, thermal management system and vehicle

Abstract

The utility model relates to an intake air cooling system, a thermal management system and a vehicle, the intake air cooling system comprises a first water pump, a first heat exchanger, an intercooler, an EGR cooler and a flow adjusting device, the first water pump, the first heat exchanger, the intercooler, the EGR cooler and the flow adjusting device are connected in sequence to form a first cooling loop; wherein the flow adjusting device is connected between the first water pump and the EGR cooler; the flow adjusting device is used for adjusting the flow of the cooling liquid flowing out of the flow adjusting device according to the temperature of the cooling liquid flowing into the flow adjusting device. According to the air inlet cooling system, combustion is improved, and the heat efficiency of the engine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of EGR, and particularly relates to an intake air cooling system, a thermal management system and a vehicle. Background Art

[0002] EGR (Exhaust Gas Re-circulation) means that a part of the exhaust gas (EGR gas) discharged from the engine is sent back to the intake manifold and enters the cylinder again together with the fresh air-fuel mixture. The EGR valve is the core component of the EGR system and is used to regulate the flow rate of the EGR gas entering the intake manifold of the engine. When the temperature of the high-temperature EGR gas drops below the dew point temperature, condensed water will be separated out from the EGR gas. If the production of condensed water is not controlled, in severe cases, it may cause the engine to stall or corrode the EGR valve.

[0003] In the prior art, for a vehicle with engine intake air intercooling, in the overall vehicle thermal management architecture, according to the cooling medium temperature from low to high, it can be divided into an air-conditioning refrigeration circuit, a low-temperature cooling system, an intake air cooling system and an engine cooling system. The intake air cooling system is a separately arranged cooling circuit, and the EGR cooler is arranged in the engine cooling system to obtain a higher EGR gas temperature and avoid the generation of condensed water.

[0004] However, in the prior art, since the EGR gas is cooled by the engine cooling system, the temperature of the cooled EGR gas is relatively high (about 90 °C), while the intake temperature of the fresh air is usually below 40 °C. After the high-temperature EGR and the fresh air are mixed, the temperature of the air-fuel mixture entering the engine cylinder will be increased, which is not conducive to the combustion of the engine and affects the improvement of the engine thermal efficiency. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide an intake air cooling system, a thermal management system and a vehicle to improve the engine thermal efficiency.

[0006] To solve the above problems, on the one hand, an embodiment of the utility model provides an intake air cooling system, including a first water pump, a first heat exchanger, an intercooler, an EGR cooler and a flow regulating device. The first water pump, the first heat exchanger, the intercooler, the EGR cooler and the flow regulating device are connected in sequence to form a first cooling circuit; wherein, the flow regulating device is connected between the first water pump and the EGR cooler;

[0007] The first heat exchanger is used to cool the coolant flowing out of the first water pump;

[0008] The flow rate regulating device is used to regulate the flow rate of the coolant flowing out of the flow rate regulating device according to the temperature of the coolant flowing into the flow rate regulating device; wherein, within a preset temperature range, the higher the temperature of the coolant flowing into the flow rate regulating device, the greater the flow rate of the coolant flowing out of the flow rate regulating device.

[0009] According to the intake air cooling system of the present utility model, since the EGR cooler is arranged in the intake air cooling system and connected to the outlet of the liquid flow channel of the intercooler, the EGR gas can be cooled to a lower temperature. The lower temperature of the EGR gas can achieve a greater EGR rate, can reduce the temperature influence of the EGR gas on the mixture gas (the mixture gas of the EGR gas and fresh air). The lower temperature of the mixture gas has better charging efficiency, which is beneficial to improving in-cylinder combustion and increasing the thermal efficiency of the engine.

[0010] In addition, the flow rate regulating device can regulate the flow rate of the coolant flowing out of the flow rate regulating device according to the temperature of the coolant flowing into the flow rate regulating device. When the temperature of the coolant flowing into the flow rate regulating device is relatively low, the flow rate of the coolant flowing out of the flow rate regulating device is relatively small (i.e., the opening degree of the flow rate regulating device is relatively small), so as to keep the temperature of the coolant in the first cooling circuit as high as possible, reduce the liquid flow rate of the intercooler and the EGR cooler, avoid the temperature of the mixture gas cooled by the intercooler and the EGR gas cooled by the EGR cooler from being too low, avoid engine stalling caused by a large amount of condensed water precipitated from the EGR gas, and at the same time can also avoid corrosion of the EGR valve caused by a large amount of condensed water generated.

[0011] Optionally, the flow rate regulating device is a first thermostat or an electromagnetic proportional control valve.

[0012] Optionally, the intercooler has a first liquid flow channel and a first gas flow channel, and the EGR cooler has a second liquid flow channel and a second gas flow channel;

[0013] The inlet of the first liquid flow channel is communicated with the first outlet of the first heat exchanger, the outlet of the first liquid flow channel is communicated with the inlet of the second liquid flow channel, and the outlet of the second liquid flow channel is communicated with the inlet of the flow rate regulating device;

[0014] The second gas flow channel is communicated between the exhaust port of the engine and the airway inlet of the EGR valve, so as to supply the EGR gas cooled by the EGR cooler to the engine intake system through the airway of the EGR valve and mix it with the fresh air entering the engine intake system to form a mixture gas;

[0015] The second gas flow channel is communicated between the cylinder inner cavity of the engine and the engine intake system, so as to supply the mixture gas into the cylinder.

[0016] Optionally, the second gas flow path is communicated between the inner cavity of the engine cylinder and the air supercharger of the engine intake system, so as to be able to cool the mixture gas supercharged by the air supercharger and supply the cooled mixture gas into the cylinder.

[0017] Optionally, it further includes a first water tank for supplying coolant to the intake air cooling system.

[0018] Optionally, the water outlet of the first water tank is connected to the pipeline connecting the flow regulating device and the first water pump.

[0019] Optionally, it further includes a first overflow pipe connected between the outlet of the first liquid flow path and the water return port of the first water tank;

[0020] A first throttle hole is provided on the first overflow pipe.

[0021] Optionally, it further includes a second overflow pipe connected between the outlet of the second liquid flow path and the water return port of the first water tank;

[0022] A second throttle hole is provided on the second overflow pipe.

[0023] Optionally, it further includes a first three-way pipe and a third overflow pipe. The first overflow pipe is connected between the outlet of the first liquid flow path and the first interface of the first three-way pipe. The second overflow pipe is connected between the outlet of the second liquid flow path and the second interface of the first three-way pipe. The water return port of the first water tank is connected to the third interface of the first three-way pipe.

[0024] Optionally, it further includes a heating component cooling device. The first water pump, the first heat exchanger and the heating component cooling device are connected in sequence to form a second cooling loop; wherein, the heating component cooling device is connected between the inlet of the first water pump and the second outlet of the first heat exchanger;

[0025] The heating component cooling device is used to cool at least one of a transmission, an on-vehicle charger, a motor controller and a DC-DC converter.

[0026] Optionally, the heating component cooling device includes:

[0027] An on-vehicle charger cooling flow path for cooling the on-vehicle charger;

[0028] A motor controller cooling flow path for cooling the motor controller and the DC-DC converter;

[0029] A transmission cooler for cooling the transmission;

[0030] The vehicle-mounted charger cooling channel, the motor controller cooling channel, and the transmission cooler are connected in sequence along the flow direction of the coolant.

[0031] Optionally, a third throttle hole is provided on the pipeline connecting the inlet of the first liquid flow channel of the intercooler and the first outlet of the first heat exchanger.

[0032] Optionally, a second heat exchanger is further included. The second heat exchanger is connected between the second outlet of the first heat exchanger and the inlet of the heating component cooling device, and the heat exchange amount of the second heat exchanger is less than the heat exchange amount of the first heat exchanger;

[0033] The second heat exchanger is used to cool the coolant flowing out of the second opening of the first heat exchanger, so that the temperature of the coolant flowing out of the outlet of the second heat exchanger is lower than the temperature of the coolant flowing out of the first outlet of the first heat exchanger.

[0034] Optionally, a first four-way valve is further included. The first four-way valve has a first liquid inlet, a second liquid inlet, a third liquid inlet, and a first liquid outlet. The first liquid inlet is connected to the outlet of the flow regulating device, the second liquid inlet is connected to the outlet of the heating component cooling device, the third liquid inlet is connected to the water outlet of the first water tank, and the first liquid outlet is connected to the inlet of the first water pump.

[0035] Optionally, a flow regulating valve is further included. The flow regulating valve is connected between the inlet of the heating component cooling device and the second outlet of the first heat exchanger;

[0036] A temperature sensor is further included. The temperature sensor is used to detect the temperature of the coolant flowing into the flow regulating valve;

[0037] The flow regulating valve is used to adjust the coolant flow rate flowing out of the flow regulating valve to the heating component cooling device according to the temperature of the coolant flowing into the flow regulating valve.

[0038] Optionally, the flow regulating valve is a second four-way valve. The second four-way valve has a fourth liquid inlet, a fifth liquid inlet, a second liquid outlet, and a third liquid outlet. The fourth liquid inlet and the second liquid outlet are communicated to form a first path, and the coolant flow rate flowing out of the second liquid outlet is adjustable. The fifth liquid inlet and the third liquid outlet are communicated to form a second path. The first path and the second path are isolated. The fourth liquid inlet is connected to the outlet of the flow regulating device, the second liquid outlet is connected to the inlet of the heating component cooling device, and the second path is connected in series in the battery cooling system.

[0039] On the other hand, an embodiment of the present invention provides a thermal management system, including an engine cooling system and the above-mentioned intake air cooling system;

[0040] The engine cooling system is used to cool the engine.

[0041] Optionally, the engine cooling system includes a second water tank, a second water pump, a cylinder water jacket, a third heat exchanger, and a second thermostat. The second water pump, the cylinder water jacket, the third heat exchanger, and the second thermostat are connected in sequence to form an engine cooling circuit. Among them, the second thermostat is connected between the second water pump and the third heat exchanger.

[0042] The second water tank is used to supply coolant to the engine cooling circuit.

[0043] Optionally, the first heat exchanger and the third heat exchanger are arranged side by side, and both the first heat exchanger and the third heat exchanger are fan radiators.

[0044] The first heat exchanger and the third heat exchanger share the same fan, or the first heat exchanger and the third heat exchanger are respectively equipped with independent fans.

[0045] Optionally, it further includes:

[0046] An air-conditioning heating system for heating the air inside the vehicle.

[0047] An air-conditioning refrigeration system for cooling the air inside the vehicle.

[0048] Optionally, the air-conditioning heating system includes a third water pump, an electric heater, and a front cabin heat exchanger. The third water pump, the electric heater, and the front cabin heat exchanger are connected in sequence, and the third water pump is connected between the electric heater and the front cabin heat exchanger.

[0049] The second water tank is also used to supply coolant to the third water pump.

[0050] The electric heater is used to heat the coolant flowing out of the third water pump.

[0051] The front cabin heat exchanger is used to release heat to the passenger compartment to increase the temperature of the passenger compartment.

[0052] Optionally, the engine cooling system further includes a second three-way pipe.

[0053] The air-conditioning heating system further includes a one-way valve, a third three-way pipe, a fourth three-way pipe, a fourth heat exchanger, a three-way switch valve, and a third four-way valve. The third four-way valve has a sixth liquid inlet, a seventh liquid inlet, a fourth liquid outlet, and a fifth liquid outlet. The three-way switch valve has a sixth liquid outlet, an eighth liquid inlet, and a ninth liquid inlet. The sixth liquid outlet is always open, and the eighth liquid inlet and the ninth liquid inlet are selectively opened.

[0054] The first interface of the second three-way pipe is connected to the water outlet of the second water tank, the second interface of the second three-way pipe is connected to the inlet of the cylinder water jacket, the third interface of the second three-way pipe is connected to the inlet of the one-way valve, the first interface of the third three-way pipe is connected to the outlet of the one-way valve, the second interface of the third three-way pipe is connected to the inlet of the third water pump, the third interface of the third three-way pipe is connected to the fourth liquid outlet, the fifth liquid outlet is connected to the inlet of the third heat exchanger, the sixth liquid inlet is connected to the outlet of the cylinder water jacket, the seventh liquid inlet is connected to the sixth liquid outlet, the first interface of the fourth three-way pipe is connected to the outlet of the front cabin heat exchanger, the second interface of the fourth three-way pipe is connected to the inlet of the fourth heat exchanger, the third interface of the fourth three-way pipe is connected to the eighth liquid inlet, and the ninth liquid inlet is connected to the outlet of the fourth heat exchanger;

[0055] The fourth heat exchanger is used to provide heat to the battery cooling system.

[0056] Optionally, the air conditioning refrigeration system includes a fifth heat exchanger, a sixth heat exchanger, an evaporator, a first expansion valve, a second expansion valve, a fourth water pump, a fifth three-way pipe and a sixth three-way pipe. The outlet of the fourth water pump is connected to the inlet of the fifth heat exchanger, the outlet of the fifth heat exchanger is connected to the first interface of the fifth three-way pipe, the second interface of the fifth three-way pipe is connected to the inlet of the second expansion valve, the outlet of the second expansion valve is connected to the inlet of the sixth heat exchanger, the outlet of the sixth heat exchanger is connected to the first interface of the sixth three-way pipe, the second interface of the sixth three-way pipe is connected to the inlet of the fourth water pump, the third interface of the fifth three-way pipe is connected to the inlet of the first expansion valve, the outlet of the first expansion valve is connected to the inlet of the evaporator, and the outlet of the evaporator is connected to the third interface of the sixth three-way pipe;

[0057] The evaporator is used to absorb the heat in the passenger compartment to lower the temperature of the passenger compartment;

[0058] The fifth heat exchanger is used to cool the coolant flowing out of the fourth water pump;

[0059] The sixth heat exchanger is used to absorb the heat of the battery cooling system.

[0060] Optionally, it further includes a battery cooling system, which includes a third water tank, a fifth water pump, a battery pack cooling flow channel, a three-way proportional valve, a seventh heat exchanger, and an eighth heat exchanger. The water outlet of the third water tank is connected to the inlet of the fifth water pump, the outlet of the fifth water pump is connected to the inlet of the battery pack cooling flow channel, the outlet of the battery pack cooling flow channel is connected to the inlet of the three-way proportional valve, the first outlet of the three-way proportional valve is connected to the inlet of the seventh heat exchanger, the outlet of the seventh heat exchanger is connected to the water return port of the third water tank, the second outlet of the three-way proportional valve is connected to the inlet of the eighth heat exchanger, and the outlet of the eighth heat exchanger is connected to the water return port of the third water tank;

[0061] The seventh heat exchanger is used to exchange heat with the fourth heat exchanger so that the coolant in the seventh heat exchanger is heated up;

[0062] The eighth heat exchanger is used to exchange heat with the sixth heat exchanger so that the coolant in the eighth heat exchanger is cooled down;

[0063] The inlet of the three-way proportional valve is normally open, and the flow rates of the first outlet and the second outlet of the three-way proportional valve are adjustable.

[0064] On the other hand, an embodiment of the present invention provides a vehicle, including the above-mentioned thermal management system. Description of the Drawings

[0065] Figure 1 is a block diagram of the thermal management system provided by an embodiment of the present invention.

[0066] Description of the Reference Numerals

[0067] 10. Engine;

[0068] 1. Intake air cooling system; 11. First water pump; 12. First heat exchanger; 13. Intercooler; 14. EGR cooler; 15. Flow rate regulating device; 16. First water tank; 17. First overflow pipe; 171. First throttle hole; 18. Second overflow pipe; 181. Second throttle hole; 19. First three-way pipe; 110. Third overflow pipe; 111. On-board charger cooling flow channel; 112. Motor controller cooling flow channel; 113. Transmission cooler; 114. Second heat exchanger; 115. First four-way valve; 116. Flow rate regulating valve; 117. Third throttle hole;

[0069] 2. Battery cooling system; 21. Third water tank; 22. Fifth water pump; 23. Battery pack cooling flow channel; 24. Three-way proportional valve; 25. Seventh heat exchanger; 26. Eighth heat exchanger;

[0070] 3. Engine cooling system; 31. Second water tank; 32. Second water pump; 33. Third heat exchanger; 34. Second thermostat; 35. Second three-way pipe;

[0071] 4. Air-conditioning heating system; 41. Third water pump; 42. Electric heater; 43. Front cabin heat exchanger; 44. Check valve; 45. Third three-way pipe; 46. Fourth three-way pipe; 47. Fourth heat exchanger; 48. Three-way switch valve; 49. Third four-way valve;

[0072] 5. Air-conditioning refrigeration system; 51. Fifth heat exchanger; 52. Sixth heat exchanger; 53. Evaporator; 54. First expansion valve; 55. Second expansion valve; 56. Fourth water pump; 57. Fifth three-way pipe; 58. Sixth three-way pipe. Detailed implementation manner

[0073] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0074] As Figure 1 shown, an intake air cooling system 1 provided by an embodiment of the present utility model includes a first water pump 11, a first heat exchanger 12, an intercooler 13, an EGR cooler 14 and a flow regulating device 15. The first water pump 11, the first heat exchanger 12, the intercooler 13, the EGR cooler 14 and the flow regulating device 15 are connected in sequence to form a first cooling circuit; wherein, the flow regulating device 15 is connected between the first water pump 11 and the EGR cooler 14; the first heat exchanger 12 is used to cool the coolant flowing out of the first water pump 11; the flow regulating device 15 is used to adjust the coolant flow rate flowing out of the flow regulating device 15 according to the temperature of the coolant flowing into the flow regulating device 15; wherein, within a preset temperature range, the higher the temperature of the coolant flowing into the flow regulating device 15, the greater the coolant flow rate flowing out of the flow regulating device 15.

[0075] According to the intake air cooling system of the present utility model, since the EGR cooler 14 is arranged in the intake air cooling system 1 and connected to the outlet of the liquid flow path of the intercooler 13, the EGR gas can be cooled to a lower temperature. The lower EGR gas temperature can achieve a greater EGR rate, can reduce the temperature influence of the EGR gas on the mixture gas (the mixture gas of the EGR gas and fresh air), and the lower mixture gas temperature has better charging efficiency, which is beneficial to improving in-cylinder combustion and increasing the thermal efficiency of the engine.

[0076] In addition, the flow rate regulating device 15 can adjust the flow rate of the coolant flowing out of the flow rate regulating device 15 according to the temperature of the coolant flowing into the flow rate regulating device 15. When the temperature of the coolant flowing into the flow rate regulating device 15 is relatively low, the flow rate of the coolant flowing out of the flow rate regulating device 15 is small (i.e., the opening degree of the flow rate regulating device 15 is small), so as to maintain the temperature of the coolant in the first cooling circuit at a relatively high temperature as much as possible, reduce the liquid flow rate of the intercooler 13 and the EGR cooler 14, avoid the temperature of the air-fuel mixture cooled by the intercooler 13 and the EGR gas cooled by the EGR cooler 14 from being too low, avoid engine stalling caused by a large amount of condensed water precipitated from the EGR gas, and at the same time avoid the corrosion of the EGR valve caused by the generation of a large amount of condensed water.

[0077] In one embodiment, the flow rate regulating device 15 is a first thermostat. The first thermostat can be a wax thermostat or an electric heating thermostat. For example, when a wax thermostat is used, when the temperature of the coolant at the inlet of the wax thermostat is lower than a specified value, the paraffin in the temperature sensing body of the wax thermostat is in a solid state, and the valve of the wax thermostat closes the internal flow passage under the action of a spring. When the temperature of the coolant at the inlet of the wax thermostat reaches the specified value, the paraffin begins to melt and gradually becomes a liquid. The larger the volume of the melted paraffin, the larger the opening degree of the valve. In this embodiment, the above preset temperature range is the temperature change range of the coolant when the opening degree of the first thermostat is from the minimum to the full open.

[0078] In another embodiment, the flow rate regulating device 15 can also be an electromagnetic proportional control valve. At this time, it needs to be used in combination with a temperature sensor. The temperature sensor detects the temperature at the inlet of the electromagnetic proportional control valve. Within the preset temperature range, the higher the temperature of the coolant flowing into the electromagnetic proportional control valve, the larger the opening degree of the electromagnetic proportional control valve, and the larger the flow rate of the coolant flowing out of the electromagnetic proportional control valve. In this embodiment, the above preset temperature range is the temperature change range of the coolant when the opening degree of the electromagnetic proportional control valve is from the minimum to the full open.

[0079] In one embodiment, the intercooler 13 has a first liquid flow channel and a first gas flow channel, and the EGR cooler 14 has a second liquid flow channel and a second gas flow channel; the inlet of the first liquid flow channel is communicated with the first outlet of the first heat exchanger 1, the outlet of the first liquid flow channel is communicated with the inlet of the second liquid flow channel, and the outlet of the second liquid flow channel is communicated with the inlet of the flow regulating device 15; the second gas flow channel is communicated between the exhaust port of the engine and the air passage inlet of the EGR valve, so as to be able to supply the EGR gas cooled by the EGR cooler 14 to the engine intake system through the air passage of the EGR valve and mix it with the fresh air entering the engine intake system to form a mixture; the second gas flow channel is communicated between the cylinder inner cavity of the engine and the engine intake system, so as to be able to supply the mixture into the cylinder.

[0080] In one embodiment, the second gas flow channel is communicated between the cylinder inner cavity of the engine and the air supercharger of the engine intake system, so as to be able to cool the mixture supercharged by the air supercharger and supply the cooled mixture into the cylinder. That is, in this embodiment, the engine has an intake supercharging function.

[0081] In one embodiment, a first water tank 16 is further included, and the first water tank 16 is used to supply coolant to the intake cooling system 1.

[0082] In one embodiment, the water outlet of the first water tank 16 is connected to the pipeline connecting the flow regulating device 15 and the first water pump 11. In this way, the coolant in the first water tank 16 can be supplied to the first water pump 11.

[0083] In one embodiment, a first overflow pipe 17 is further included. The first overflow pipe 17 is connected between the outlet of the first liquid flow channel and the water return port of the first water tank 16. The first overflow pipe 17 is used to discharge the bubbles in the coolant flowing out of the outlet of the first liquid flow channel; a first throttle hole 171 is provided on the first overflow pipe 17. The first throttle hole 171 is used to reduce the coolant flowing into the first water tank 16 through the first overflow pipe 17 when there are no bubbles at the (liquid) outlet of the intercooler 3, so as to ensure the cooling flow requirement of the first cooling circuit. The first overflow pipe 17 can be made of a flexible hose. A clamp can be used to connect between the flexible hose and the rigid pipe.

[0084] In one embodiment, a second overflow pipe 18 is further included. The second overflow pipe 18 is connected between the outlet of the second liquid flow path and the water return port of the first water tank 16. The second overflow pipe 18 is used to discharge the bubbles in the coolant flowing out of the outlet of the second liquid flow path. A second throttle hole 181 is provided on the second overflow pipe 18. The second throttle hole 181 is used to reduce the coolant flowing into the first water tank 16 through the second overflow pipe 18 when there are no bubbles at the (liquid) outlet of the EGR cooler 4, so as to ensure the cooling flow requirement of the first cooling circuit. The first overflow pipe 18 can be made of a hose. A clamp can be used to connect the hose and the hard pipe.

[0085] In one embodiment, a first three-way pipe 19 and a third overflow pipe 110 are further included. The first overflow pipe 17 is connected between the outlet of the first liquid flow path and the first interface of the first three-way pipe 19. The second overflow pipe 18 is connected between the outlet of the second liquid flow path and the second interface of the first three-way pipe 19. The water return port of the first water tank 16 is connected to the third interface of the first three-way pipe 19.

[0086] In one embodiment, a heating component cooling device is further included. The first water pump 11, the first heat exchanger 12 and the heating component cooling device are connected in sequence to form a second cooling circuit. Among them, the heating component cooling device is connected between the inlet of the first water pump 11 and the second outlet of the first heat exchanger 12. The first outlet and the second outlet of the first heat exchanger 12 are two independent outlets. That is, the first heat exchanger 12 has one inlet and two outlets. The heating component cooling device is used to cool at least one of the transmission, the on-vehicle charger, the motor controller and the DC-DC converter. In this way, the intake air cooling system 1 includes two cooling circuits, and the two cooling circuits share the first water pump 11, which can reduce the number of components and the cost of the whole vehicle.

[0087] In one embodiment, the transmission is a mechatronic coupler.

[0088] In one embodiment, the heating component cooling device includes an on-vehicle charger cooling flow path 111, a motor controller cooling flow path 112 and a transmission cooler 113. The on-vehicle charger cooling flow path 111 is used to cool the on-vehicle charger. The motor controller cooling flow path 112 is used to cool the motor controller and the DC-DC converter. The transmission cooler 113 is used to cool the transmission. The on-vehicle charger cooling flow path 111, the motor controller cooling flow path 112 and the transmission cooler 113 are connected in sequence along the flow direction of the coolant.

[0089] In one embodiment, a third throttle orifice 117 is provided on the pipeline connecting the inlet of the first liquid flow channel of the intercooler 13 and the first outlet of the first heat exchanger 11. The function of the third throttle orifice 117 is to distribute the flow rates of the first cooling circuit and the second cooling circuit according to the cooling requirements. The third throttle orifice 117 is a plastic or metal hard pipe with electromagnetic proportional regulation or a mechanical type with a fixed inner diameter.

[0090] The intercooler 3 is a gas / liquid heat exchanger. Its main purpose is to cool the high-temperature mixed gas after the fresh air and the EGR gas are combined to an appropriate temperature according to the engine operating conditions, and then enter the engine cylinder to participate in combustion. The EGR cooler 14 is a gas / liquid heat exchanger. Its main function is to cool the high-temperature EGR gas (up to 600 °C) obtained by the engine catalytic converter assembly to below 80 °C, then mix it with the fresh air, enter the supercharger, and enter the intercooler 13 after being supercharged by the supercharger.

[0091] The first radiator 12 is a heat exchanger between air and coolant, which takes away the heat in the high-temperature coolant through cold air (suctioned by the fan).

[0092] In one embodiment, a second heat exchanger 114 is further included. The second heat exchanger 114 is connected between the second outlet of the first heat exchanger 12 and the inlet of the heat generating component cooling device. The heat exchange amount of the second heat exchanger 114 is less than that of the first heat exchanger 12. The second heat exchanger 114 is used to cool the coolant flowing out of the second opening of the first heat exchanger 12, so that the temperature of the coolant flowing out of the second heat exchanger 114 is lower than the temperature of the coolant flowing out of the first outlet of the first heat exchanger 12. That is, the second heat exchanger 114 is used to further cool the coolant cooled by the first heat exchanger 12 to meet the lower coolant temperature requirements of the on-vehicle charger cooling flow channel 111, the motor controller cooling flow channel 112, and the transmission cooler 113 in the second cooling circuit, so as to better cool the on-vehicle charger, the motor controller cooling flow channel, the DC-DC converter, and the transmission.

[0093] In one embodiment, a first four-way valve 115 is further included. The first four-way valve 115 has a first liquid inlet, a second liquid inlet, a third liquid inlet, and a first liquid outlet. The first liquid inlet is connected to the outlet of the flow rate regulating device 15, the second liquid inlet is connected to the outlet of the heat generating component cooling device (transmission cooler 113), the third liquid inlet is connected to the water outlet of the first water tank 16, and the first liquid outlet is connected to the inlet of the first water pump 11.

[0094] In one embodiment, a flow regulating valve 116 is further included. The flow regulating valve 116 is connected between the inlet of the heating component cooling device and the second outlet of the first heat exchanger 12. Specifically, the flow regulating valve 116 is connected between the inlet of the on-vehicle charger cooling flow path 111 and the outlet of the second heat exchanger 114. A temperature sensor is also included, which is used to detect the temperature of the coolant flowing into the flow regulating valve 116. The flow regulating valve 116 is used to adjust the flow rate of the coolant flowing out from the flow regulating valve 116 to the heating component cooling device (on-vehicle charger cooling flow path 111) according to the temperature of the coolant flowing into the flow regulating valve 116. This temperature sensor can be arranged on the pipeline between the flow regulating valve 116 and the outlet of the second heat exchanger 114. This temperature sensor is used to monitor the coolant temperature of the second cooling loop. The flow rate at the outlet of the flow regulating valve 116 can be adjusted according to the cooling requirements of the vehicle operating conditions. Specifically, the flow rate at the outlet of the flow regulating valve 116 is adjusted according to the coolant temperature T detected by the temperature sensor. For example, when the temperature T≥60°C (which can be calibrated according to the actual requirements of the vehicle), the flow regulating valve 116 is fully open; when T<30°C (which can be calibrated according to the actual requirements of the vehicle), the flow regulating valve 116 maintains a minimum opening value of 20%; when 30°C≤T<60°C, the flow rate at the outlet of the flow regulating valve 116 is controlled in a linear interpolation manner. After the coolant flows out from the outlet of the flow regulating valve 116, the pipeline guides the coolant into the on-vehicle charger cooling flow path, and then uses the pipeline to guide the low-temperature coolant to the motor controller cooling flow path, thereby realizing the cooling of the motor controller and the DC-DC converter. Then, the coolant is introduced into the liquid channel in the transmission cooler through the pipeline. The transmission cooler is a liquid / liquid heat exchanger, and its main function is to use the low-temperature coolant to cool the transmission lubricating oil to ensure that the moving parts (such as gear sets) of the transmission will not be damaged due to "dry friction".

[0095] In one embodiment, referring to Figure 1 , the flow regulating valve 116 is a second four-way valve. The second four-way valve is a solenoid valve. The second four-way valve has a fourth liquid inlet, a fifth liquid inlet, a second liquid outlet and a third liquid outlet. The fourth liquid inlet and the second liquid outlet are connected to form a first passage, and the flow rate of the coolant flowing out from the second liquid outlet is adjustable. The fifth liquid inlet and the third liquid outlet are connected to form a second passage. The first passage is isolated from the second passage. The fourth liquid inlet is connected to the outlet of the flow regulating device 5, and the second liquid outlet is connected to the inlet of the heating component cooling device (on-vehicle charger cooling flow path 111). The second passage is connected in series in the battery cooling system 2.

[0096] In other embodiments, it is also possible that the flow regulating valve 116 is a two-way valve, that is, the battery cooling system 2 is not connected in series with the flow regulating valve 116.

[0097] In other embodiments, the flow regulating valve 116 can also be cancelled, and the inlet of the heating component cooling device is directly connected to the second interface of the first heat exchanger 12 through a pipeline.

[0098] In other embodiments, the second heat exchanger 114 can also be cancelled.

[0099] In the above embodiments, each component is connected by a flexible hose or a rigid pipe, and the connection between the flexible hose and the pipe joint is fastened by a clamp. Alternatively, the flexible hose or the rigid pipe is connected and fixed by a quick-connect structure.

[0100] In addition, referring to Figure 1 , the embodiment of the present invention provides a thermal management system, including an engine cooling system 3 and the intake air cooling system 1 of the above embodiment; the engine cooling system 3 is used to cool the engine 10.

[0101] In one embodiment, the engine cooling system 3 includes a second water tank 31, a second water pump 32, a cylinder water jacket, a third heat exchanger 33 and a second thermostat 34. The second water pump 32, the cylinder water jacket, the third heat exchanger 33 and the second thermostat 34 are connected in sequence to form an engine cooling circuit; wherein, the second thermostat 34 is connected between the second water pump 32 and the third heat exchanger 33; the second water tank 31 is used to supply coolant to the engine cooling circuit.

[0102] In one embodiment, the first heat exchanger 12 and the third heat exchanger 33 are arranged side by side, and both the first heat exchanger 12 and the third heat exchanger 33 are fan radiators. Referring to Figure 1 , the first heat exchanger 12 and the third heat exchanger 33 share the same fan to reduce components and save space in the engine compartment.

[0103] In other embodiments, it is also possible that the first heat exchanger 12 and the third heat exchanger 33 are respectively configured with independent fans to enhance the heat dissipation effect.

[0104] In one embodiment, an air-conditioning heating system 4 and an air-conditioning refrigeration system 5 are further included. The air-conditioning heating system 4 is used for heating the air inside the vehicle, and the air-conditioning refrigeration system 5 is used for cooling the air inside the vehicle.

[0105] In one embodiment, referring to Figure 1, the air conditioner heating system 4 includes a third water pump 41, an electric heater 42, and a front cabin heat exchanger 43 (also known as a heater core). The third water pump 41, the electric heater 42, and the front cabin heat exchanger 43 are connected in sequence. The third water pump 41 is connected between the electric heater 42 and the front cabin heat exchanger 43. The second water tank 31 is also used to supply coolant to the third water pump 41. That is, the engine cooling system 3 and the air conditioner heating system 4 share the second water tank 31 to reduce the number of components and lower costs. The electric heater 42 is used to heat the coolant flowing out of the third water pump 41; the front cabin heat exchanger 43 is used to release heat to the passenger compartment to raise the temperature of the passenger compartment.

[0106] In one embodiment, the engine cooling system 3 further includes a second three-way pipe 35; the air conditioner heating system 4 further includes a one-way valve 44, a third three-way pipe 45, a fourth three-way pipe 46, a fourth heat exchanger 47, a three-way switch valve 48, and a third four-way valve 49. The third four-way valve 49 has a sixth liquid inlet, a seventh liquid inlet, a fourth liquid outlet, and a fifth liquid outlet. The third four-way valve 49 is an electromagnetic valve four-way valve. The three-way switch valve 48 has a sixth liquid outlet, an eighth liquid inlet, and a ninth liquid inlet. The sixth liquid outlet is normally open, and the eighth liquid inlet and the ninth liquid inlet are selectively opened; that is, when one of the eighth liquid inlet and the ninth liquid inlet is opened, the other is closed. The first interface of the second three-way pipe 35 is connected to the water outlet of the second water tank 31, the second interface of the second three-way pipe 35 is connected to the inlet of the cylinder water jacket, the third interface of the second three-way pipe 35 is connected to the inlet of the one-way valve 44, the first interface of the third three-way pipe 45 is connected to the outlet of the one-way valve 44, the second interface of the third three-way pipe 45 is connected to the inlet of the third water pump 41, the third interface of the third three-way pipe 45 is connected to the fourth liquid outlet, the fifth liquid outlet is connected to the inlet of the third heat exchanger 33, the sixth liquid inlet is connected to the outlet of the cylinder water jacket, the seventh liquid inlet is connected to the sixth liquid outlet, the first interface of the fourth three-way pipe 46 is connected to the outlet of the front cabin heat exchanger 43, the second interface of the fourth three-way pipe 46 is connected to the inlet of the fourth heat exchanger 47, the third interface of the fourth three-way pipe 46 is connected to the eighth liquid inlet, and the ninth liquid inlet is connected to the outlet of the fourth heat exchanger 47; the fourth heat exchanger 47 is used to provide heat to the battery cooling system 2.

[0107] In one embodiment, the air-conditioning refrigeration system 5 includes a fifth heat exchanger 51, a sixth heat exchanger 52, an evaporator 53, a first expansion valve 54, a second expansion valve 55, a fourth water pump 56, a fifth three-way pipe 57 and a sixth three-way pipe 58. The outlet of the fourth water pump 56 is connected to the inlet of the fifth heat exchanger 51. The outlet of the fifth heat exchanger 51 is connected to the first interface of the fifth three-way pipe 57. The second interface of the fifth three-way pipe 57 is connected to the inlet of the second expansion valve 55. The outlet of the second expansion valve 55 is connected to the inlet of the sixth heat exchanger 52. The outlet of the sixth heat exchanger 52 is connected to the first interface of the sixth three-way pipe 58. The second interface of the sixth three-way pipe 58 is connected to the inlet of the fourth water pump 56. The third interface of the fifth three-way pipe 57 is connected to the inlet of the first expansion valve 54. The outlet of the first expansion valve 54 is connected to the inlet of the evaporator 53. The outlet of the evaporator 53 is connected to the third interface of the sixth three-way pipe 58. The evaporator 53 is configured to absorb the heat in the passenger compartment to lower the temperature of the passenger compartment. The fifth heat exchanger 51 is configured to cool the coolant flowing out of the fourth water pump 56. The sixth heat exchanger 52 is configured to absorb the heat of the battery cooling system 2.

[0108] In one embodiment, it further includes a battery cooling system 2. The battery cooling system 2 includes a third water tank 21, a fifth water pump 22, a battery pack cooling flow channel 23, a three-way proportional valve 24, a seventh heat exchanger 25 and an eighth heat exchanger 26. The water outlet of the third water tank 21 is connected to the inlet of the fifth water pump 22. The outlet of the fifth water pump 22 is connected to the inlet of the battery pack cooling flow channel 23. The outlet of the battery pack cooling flow channel 23 is connected to the inlet of the three-way proportional valve 24. The first outlet of the three-way proportional valve 24 is connected to the inlet of the seventh heat exchanger 25. The outlet of the seventh heat exchanger 25 is connected to the water return port of the third water tank 31. The second outlet of the three-way proportional valve 24 is connected to the inlet of the eighth heat exchanger 26. The outlet of the eighth heat exchanger 26 is connected to the water return port of the third water tank 21. The seventh heat exchanger 25 is used to exchange heat with the fourth heat exchanger 47 so that the coolant in the seventh heat exchanger 25 is heated up. The eighth heat exchanger 26 is used to exchange heat with the sixth heat exchanger 52 so that the coolant in the eighth heat exchanger 26 is cooled down. The inlet of the three-way proportional valve 25 is always open, and the flow rates of the first outlet and the second outlet of the three-way proportional valve 25 are adjustable. In this way, the flow rates of the coolant flowing into the seventh heat exchanger 25 and the eighth heat exchanger 26 can be adjusted. The temperature of the coolant flowing out of the seventh heat exchanger 25 rises, and the temperature of the coolant flowing out of the eighth heat exchanger 26 drops. The two cold and hot coolants are mixed and then enter the third water tank 21, and are supplied to the battery pack cooling flow channel 23 by the fifth water pump 22, so as to accurately control the temperature of the battery pack. That is, the temperature of the battery pack can be increased (for example, in a low-temperature environment), and the humidity of the battery pack can also be reduced (in a high-temperature environment).

[0109] In a specific embodiment, when the flow regulating valve 116 adopts the above-mentioned second four-way valve, the second passage is connected in series in the battery cooling system 2. The second passage is communicated between the outlet of the seventh heat exchanger 25 and the water return port of the third water tank 21, and the second passage is also communicated between the outlet of the eighth heat exchanger 26 and the water return port of the third water tank 21. Using the flow regulating valve 116 to realize the connection of the battery cooling system 2 can simplify the structure.

[0110] On the other hand, an embodiment of the present invention provides a vehicle, including the above-mentioned thermal management system.

[0111] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intake air cooling system, characterized in that, It includes a first water pump, a first heat exchanger, an intercooler, an EGR cooler and a flow regulating device. The first water pump, the first heat exchanger, the intercooler, the EGR cooler and the flow regulating device are connected in sequence to form a first cooling circuit. Among them, the flow regulating device is connected between the first water pump and the EGR cooler; The first heat exchanger is used to cool the coolant flowing out of the first water pump; The flow regulating device is used to adjust the coolant flow rate flowing out of the flow regulating device according to the temperature of the coolant flowing into the flow regulating device. Among them, within a preset temperature range, the higher the temperature of the coolant flowing into the flow regulating device, the greater the coolant flow rate flowing out of the flow regulating device.

2. The intake air cooling system according to claim 1, wherein The flow regulating device is a first thermostat or an electromagnetic proportional control valve.

3. The intake air cooling system according to claim 1, wherein, The intercooler has a first liquid flow channel and a first gas flow channel, and the EGR cooler has a second liquid flow channel and a second gas flow channel; The inlet of the first liquid flow channel is communicated with the first outlet of the first heat exchanger, the outlet of the first liquid flow channel is communicated with the inlet of the second liquid flow channel, and the outlet of the second liquid flow channel is communicated with the inlet of the flow regulating device; The second gas flow channel is communicated between the exhaust port of the engine and the air passage inlet of the EGR valve, so as to be able to supply the EGR gas cooled by the EGR cooler to the engine intake system through the air passage of the EGR valve and mix it with the fresh air entering the engine intake system to form a mixture; The second gas flow channel is communicated between the cylinder inner cavity of the engine and the engine intake system, so as to be able to supply the mixture into the cylinder.

4. The intake air cooling system according to claim 3, wherein The second gas flow channel is communicated between the cylinder inner cavity of the engine and the air supercharger of the engine intake system, so as to be able to cool the mixture supercharged by the air supercharger and supply the cooled mixture into the cylinder.

5. The intake air cooling system according to claim 3, characterized in that It further includes a first water tank, and the first water tank is used to supply coolant to the intake cooling system.

6. The intake air cooling system according to claim 5, characterized in that, The water outlet of the first water tank is connected to the pipeline connecting the flow regulating device and the first water pump.

7. The intake air cooling system according to claim 5, characterized in that, It further includes a first overflow pipe, and the first overflow pipe is connected between the outlet of the first liquid flow channel and the water return port of the first water tank; A first throttle hole is provided on the first overflow pipe.

8. The intake air cooling system according to claim 7, characterized in that, It further includes a second overflow pipe, and the second overflow pipe is connected between the outlet of the second liquid flow channel and the water return port of the first water tank; A second throttle hole is provided on the second overflow pipe.

9. The intake air cooling system according to claim 8, wherein It further includes a first three-way pipe and a third overflow pipe. The first overflow pipe is connected between the outlet of the first liquid flow channel and the first interface of the first three-way pipe, the second overflow pipe is connected between the outlet of the second liquid flow channel and the second interface of the first three-way pipe, and the water return port of the first water tank is connected to the third interface of the first three-way pipe.

10. The intake air cooling system according to claim 5, wherein It further includes a heating component cooling device. The first water pump, the first heat exchanger and the heating component cooling device are connected in sequence to form a second cooling circuit. Among them, the heating component cooling device is connected between the inlet of the first water pump and the second outlet of the first heat exchanger; The heating component cooling device is used to cool at least one of a transmission, an on-vehicle charger, a motor controller, and a DC-DC converter.

11. The intake air cooling system according to claim 10, wherein, The heating component cooling device includes: An on-vehicle charger cooling flow path for cooling the on-vehicle charger; A motor controller cooling flow path for cooling the motor controller and the DC-DC converter; A transmission cooler for cooling the transmission; The on-vehicle charger cooling flow path, the motor controller cooling flow path, and the transmission cooler are sequentially connected along the flow direction of the coolant.

12. The intake air cooling system according to claim 10, characterized in that, A third throttle orifice is provided on the pipeline connecting the inlet of the first liquid flow path connecting the intercooler and the first outlet of the first heat exchanger.

13. The intake air cooling system according to claim 10, characterized in that, It further includes a second heat exchanger, and the second heat exchanger is connected between the second outlet of the first heat exchanger and the inlet of the heating component cooling device, and the heat exchange amount of the second heat exchanger is less than the heat exchange amount of the first heat exchanger; The second heat exchanger is used to cool the coolant flowing out of the second opening of the first heat exchanger, so that the temperature of the coolant flowing out of the outlet of the second heat exchanger is lower than the temperature of the coolant flowing out of the first outlet of the first heat exchanger.

14. The intake air cooling system according to claim 10, characterized in that, It further includes a first four-way valve, and the first four-way valve has a first liquid inlet, a second liquid inlet, a third liquid inlet, and a first liquid outlet. The first liquid inlet is connected to the outlet of the flow regulating device, the second liquid inlet is connected to the outlet of the heating component cooling device, the third liquid inlet is connected to the water outlet of the first water tank, and the first liquid outlet is connected to the inlet of the first water pump.

15. The intake air cooling system according to claim 10, wherein, It further includes a flow regulating valve, and the flow regulating valve is connected between the inlet of the heating component cooling device and the second outlet of the first heat exchanger; It further includes a temperature sensor, and the temperature sensor is used to detect the temperature of the coolant flowing into the flow regulating valve; The flow regulating valve is used to adjust the coolant flow rate flowing out of the flow regulating valve to the heating component cooling device according to the temperature of the coolant flowing into the flow regulating valve.

16. The intake air cooling system according to claim 15, wherein, The flow regulating valve is a second four-way valve, and the second four-way valve has a fourth liquid inlet, a fifth liquid inlet, a second liquid outlet, and a third liquid outlet. The fourth liquid inlet and the second liquid outlet are communicated to form a first path, and the coolant flow rate flowing out of the second liquid outlet is adjustable. The fifth liquid inlet and the third liquid outlet are communicated to form a second path, and the first path is isolated from the second path. The fourth liquid inlet is connected to the outlet of the flow regulating device, the second liquid outlet is connected to the inlet of the heating component cooling device, and the second path is connected in series in the battery cooling system.

17. A thermal management system, characterized in that, It includes an engine cooling system and the intake air cooling system according to any one of claims 1-16; The engine cooling system is used to cool the engine.

18. The thermal management system according to claim 17, characterized in that, The engine cooling system includes a second water tank, a second water pump, a cylinder water jacket, a third heat exchanger, and a second thermostat. The second water pump, the cylinder water jacket, the third heat exchanger, and the second thermostat are sequentially connected to form an engine cooling circuit; wherein, the second thermostat is connected between the second water pump and the third heat exchanger; The second water tank is used to supply coolant to the engine cooling circuit.

19. The thermal management system according to claim 18, wherein The first heat exchanger and the third heat exchanger are arranged side by side, and both the first heat exchanger and the third heat exchanger are fan radiators; The first heat exchanger and the third heat exchanger share the same fan, or the first heat exchanger and the third heat exchanger are respectively equipped with independent fans.

20. The thermal management system according to claim 18, characterized in that, It further includes: An air-conditioning heating system for heating the air inside the vehicle; An air-conditioning cooling system for cooling the air inside the vehicle.

21. The thermal management system according to claim 20, characterized in that, The air-conditioning heating system includes a third water pump, an electric heater and a front cabin heat exchanger. The third water pump, the electric heater and the front cabin heat exchanger are connected in sequence, and the third water pump is connected between the electric heater and the front cabin heat exchanger; The second water tank is also used to supply coolant to the third water pump; The electric heater is used to heat the coolant flowing out of the third water pump; The front cabin heat exchanger is used to release heat to the vehicle cabin to raise the temperature of the vehicle cabin.

22. The thermal management system according to claim 21, wherein The engine cooling system further includes a second three-way pipe; The air-conditioning heating system further includes a one-way valve, a third three-way pipe, a fourth three-way pipe, a fourth heat exchanger, a three-way switch valve and a third four-way valve. The third four-way valve has a sixth liquid inlet, a seventh liquid inlet, a fourth liquid outlet and a fifth liquid outlet. The three-way switch valve has a sixth liquid outlet, an eighth liquid inlet and a ninth liquid inlet. The sixth liquid outlet is normally open, and the eighth liquid inlet and the ninth liquid inlet are selectively opened; The first interface of the second three-way pipe is connected to the water outlet of the second water tank, the second interface of the second three-way pipe is connected to the inlet of the cylinder water jacket, the third interface of the second three-way pipe is connected to the inlet of the one-way valve, the first interface of the third three-way pipe is connected to the outlet of the one-way valve, the second interface of the third three-way pipe is connected to the inlet of the third water pump, the third interface of the third three-way pipe is connected to the fourth liquid outlet, the fifth liquid outlet is connected to the inlet of the third heat exchanger, the sixth liquid inlet is connected to the outlet of the cylinder water jacket, the seventh liquid inlet is connected to the sixth liquid outlet, the first interface of the fourth three-way pipe is connected to the outlet of the front cabin heat exchanger, the second interface of the fourth three-way pipe is connected to the inlet of the fourth heat exchanger, the third interface of the fourth three-way pipe is connected to the eighth liquid inlet, and the ninth liquid inlet is connected to the outlet of the fourth heat exchanger; The fourth heat exchanger is used to provide heat to the battery cooling system.

23. The thermal management system according to claim 22, wherein, The air-conditioning refrigeration system includes a fifth heat exchanger, a sixth heat exchanger, an evaporator, a first expansion valve, a second expansion valve, a fourth water pump, a fifth three-way pipe, and a sixth three-way pipe. The outlet of the fourth water pump is connected to the inlet of the fifth heat exchanger. The outlet of the fifth heat exchanger is connected to the first interface of the fifth three-way pipe. The second interface of the fifth three-way pipe is connected to the inlet of the second expansion valve. The outlet of the second expansion valve is connected to the inlet of the sixth heat exchanger. The outlet of the sixth heat exchanger is connected to the first interface of the sixth three-way pipe. The second interface of the sixth three-way pipe is connected to the inlet of the fourth water pump. The third interface of the fifth three-way pipe is connected to the inlet of the first expansion valve. The outlet of the first expansion valve is connected to the inlet of the evaporator. The outlet of the evaporator is connected to the third interface of the sixth three-way pipe; The evaporator is configured to absorb the heat in the vehicle cabin to lower the temperature of the vehicle cabin; The fifth heat exchanger is configured to cool the coolant flowing out of the fourth water pump; The sixth heat exchanger is configured to absorb the heat of the battery cooling system.

24. The thermal management system according to claim 23, wherein It further includes a battery cooling system, which includes a third water tank, a fifth water pump, a battery pack cooling flow path, a three-way proportional valve, a seventh heat exchanger, and an eighth heat exchanger. The water outlet of the third water tank is connected to the inlet of the fifth water pump. The outlet of the fifth water pump is connected to the inlet of the battery pack cooling flow path. The outlet of the battery pack cooling flow path is connected to the inlet of the three-way proportional valve. The first outlet of the three-way proportional valve is connected to the inlet of the seventh heat exchanger. The outlet of the seventh heat exchanger is connected to the water return port of the third water tank. The second outlet of the three-way proportional valve is connected to the inlet of the eighth heat exchanger. The outlet of the eighth heat exchanger is connected to the water return port of the third water tank; The seventh heat exchanger is configured to exchange heat with the fourth heat exchanger to raise the temperature of the coolant in the seventh heat exchanger; The eighth heat exchanger is configured to exchange heat with the sixth heat exchanger to lower the temperature of the coolant in the eighth heat exchanger; The inlet of the three-way proportional valve is normally open, and the flow rates of the first outlet and the second outlet of the three-way proportional valve are adjustable.

25. A vehicle, characterized in that, It includes the thermal management system according to any one of claims 17-24.

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