Thermal management system and vehicle

Abstract

The invention provides a thermal management system and a vehicle, and relates to the field of new energy vehicles. The thermal management system comprises a four-way valve, a nine-way valve and a plurality of loops, and through different communication modes of the four-way valve and the nine-way valve, an engine loop, an electric drive assembly loop, a battery loop, a cooling loop, a transmission loop and an air conditioner loop in the multiple loops form different loops. Therefore, the cooling and heating function requirements of an engine, a passenger compartment, a battery and a motor in the extended-range hybrid power vehicle under different working conditions are met, the air conditioner loop enables the corresponding air cooling condenser and water cooling condenser to be jointly matched to process refrigerants through the combination of the two electromagnetic switch valves, the refrigerating capacity of an air conditioner is improved, and the service life of the air conditioner is prolonged. And meanwhile, the water-cooling intercooler is arranged between the electric drive assembly and the motor water pump according to the heat management requirement, the water-cooling intercooler and the low-temperature radiator work in a matched mode, the number of valve assemblies and the number of heat dissipation modules are reduced on the whole, and therefore cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and in particular to a thermal management system and a vehicle. Background Art

[0002] With the development of new energy vehicles, extended-range or hybrid models are all equipped with an engine thermal management system based on the pure electric solution, and need to take into account the vehicle's air-conditioning and refrigeration performance and control production costs while meeting the actual needs of users.

[0003] In the solution of adding an engine thermal management system on the basis of the existing pure electric solution, since the working environment of the air conditioning in the extended-range vehicle is worse than that of the pure electric solution, the cooling effect of the air conditioning in the extended-range or hybrid vehicle is reduced compared with the pure electric vehicle. In addition, there are many valve combinations in the existing technical solutions, which are not easy to make into integrated modules and have high costs.

[0004] Therefore, the existing technical solution of adding an engine thermal management system on the basis of the existing pure electric system still has defects in terms of poor cooling effect and high cost. Summary of the invention

[0005] The present application provides a thermal management system and a vehicle, which are used to solve the problems that the existing technical solution of adding an engine thermal management system on the basis of an existing pure electric vehicle still has defects in terms of poor cooling effect and high cost.

[0006] In a first aspect, the present application provides a thermal management system applied to a range-extended vehicle, wherein the range-extended vehicle includes an engine, an electric drive assembly, a four-way valve, a nine-way valve, a battery, and a passenger compartment, and the thermal management system includes:

[0007] an engine circuit for regulating the temperature of said engine;

[0008] An electric drive assembly circuit, used to adjust the temperature of the electric drive assembly;

[0009] A battery circuit for regulating the temperature of the battery;

[0010] A cooling circuit, used to assist in regulating the temperature of the battery and the temperature of the electric drive assembly;

[0011] A transmission circuit, used for connecting the four-way valve and the nine-way valve;

[0012] An air conditioning circuit, used for adjusting the temperature of the passenger compartment, the air conditioning circuit comprising an air-cooled condenser and a water-cooled condenser, wherein the air conditioning circuit and the transmission circuit share the water-cooled condenser, and the cooling circuit and the air conditioning circuit share a low-temperature cooler Chiller;

[0013] The four-way valve is used to control the engine circuit, the water-cooled condenser and the nine-way valve to form different circuits;

[0014] The nine-way valve is used to control the water-cooled condenser, the electric drive assembly circuit, the cooling circuit and the battery circuit to form different circuits.

[0015] In one possible design, the four-way valve includes four ports, two ports of the four-way valve are respectively connected to the outlet and the inlet of the engine circuit, and the other two ports of the four-way valve are respectively connected to the water-cooled condenser and the nine-way valve.

[0016] In one possible design, two ports of the nine-way valve are respectively connected to the four-way valve and the water-cooled condenser, the other two ports of the nine-way valve are respectively connected to the cooling circuit, two more ports of the nine-way valve are connected to the battery circuit, and the remaining three ports of the nine-way valve are connected to the electric drive assembly circuit.

[0017] In one possible design, the engine circuit is provided with a high-temperature radiator to cool the engine, and the transmission circuit is provided with a three-way valve and a warm air water pump, wherein the three-way valve is used to adjust the flow direction of the flowing medium in the transmission circuit, and the warm air water pump is used to transmit the flowing medium in the transmission circuit.

[0018] In one possible design, the air-conditioning circuit includes a high-pressure passage and a low-pressure passage. The high-pressure passage is connected in parallel with a plurality of electronic expansion valves, a plurality of solenoid switch valves, and a water-cooled condenser and an air-cooled condenser corresponding to each of the solenoid switch valves. The low-pressure passage is connected in parallel with the low-temperature cooler Chiller and the evaporator. The high-pressure passage and the low-pressure passage are connected through the plurality of electronic expansion valves.

[0019] In one possible design, the electric drive assembly circuit includes a low-temperature radiator, an electric drive assembly, a water-cooled intercooler and a motor water pump, wherein the electric drive assembly, the water-cooled intercooler and the motor water pump are connected in series.

[0020] In a possible design, the battery circuit includes a high-voltage battery pack and a battery water pump, wherein the battery water pump is used to transport a flow medium in the battery circuit.

[0021] In a possible design, in a first connection mode of the four-way valve, the engine circuit is not connected to the transmission circuit, and in a second connection mode of the four-way valve, the engine circuit is connected to the transmission circuit.

[0022] In a possible design, in the first connection mode of the nine-way valve, the transmission circuit is connected to the electric drive assembly circuit, and the cooling circuit is connected to the battery circuit.

[0023] In a possible design, in the second connection mode of the nine-way valve, the transmission circuit and the battery circuit are connected, and the electric drive assembly circuit and the cooling circuit are connected in series.

[0024] In one possible design, in the third connection mode of the nine-way valve, the transmission circuit is connected to the battery circuit, and the cooling circuit is connected to the first inlet and the first outlet of the electric drive assembly circuit, so that the flow medium in the electric drive assembly circuit flows through the low-temperature radiator.

[0025] In one possible design, in the fourth connection mode of the nine-way valve, the transmission circuit is connected to the battery circuit, and the cooling circuit is connected to the second inlet and the first outlet of the electric drive assembly circuit, so that the flow medium in the electric drive assembly circuit does not flow through the low-temperature radiator.

[0026] In a second aspect, the present application provides a vehicle, which includes a thermal management system as described in any one of the above technical solutions.

[0027] A thermal management system and vehicle provided in the present application, through different connection modes of four-way valves and nine-way valves, the engine circuit, electric drive assembly circuit, battery circuit, cooling circuit, transmission circuit and air-conditioning circuit constitute different circuits, thereby meeting the cooling and heating function requirements of the engine, passenger compartment, battery and motor in the extended-range hybrid vehicle under different working conditions. The air-conditioning circuit uses a combination of two electromagnetic switch valves to enable the corresponding air-cooled condenser and water-cooled condenser to cooperate in processing the refrigerant, thereby improving the cooling capacity of the air conditioner. At the same time, according to the thermal management requirements, a water-cooled intercooler is arranged between the electric drive assembly and the motor water pump. The water-cooled intercooler cooperates with the low-temperature radiator to reduce the number of valve components and heat dissipation modules as a whole, thereby achieving cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of a thermal management system provided by an embodiment of the present application in a first connection mode of a nine-way valve;

[0030] Figure 2 A schematic diagram of a thermal management system provided by an embodiment of the present application in a second connection mode of a nine-way valve;

[0031] Figure 3 A schematic diagram of a thermal management system provided by an embodiment of the present application in a third connection mode of a nine-way valve;

[0032] Figure 4 A schematic diagram of a thermal management system provided in an embodiment of the present application in a fourth connection mode of a nine-way valve. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein, for example.

[0035] A hybrid vehicle is a vehicle whose drive system is composed of two or more single drive systems that can operate simultaneously. It is an important branch of new energy vehicles, which achieves a balance between ease of operation and factors such as energy saving and cost. In order to meet the needs of users, hybrid vehicles are becoming more and more common in the market. Hybrid vehicles contain two power systems, the engine and the motor. With different power modes, they can reflect three different driving modes: pure electric, hybrid, and fuel. According to the connection method of the hybrid drive, hybrid vehicles are generally divided into series hybrid vehicles, parallel hybrid vehicles, and hybrid hybrid vehicles.

[0036] Among them, series hybrid electric vehicles are also called extended-range electric vehicles, which refer to pure electric vehicles that add an internal combustion engine to charge the power battery or directly drive the motor to increase the driving range, thereby overcoming the short driving range of pure electric vehicles. Since the power system of hybrid electric vehicles is larger than that of traditional fuel vehicles, the complexity of its thermal management system will also increase. The power battery, motor and high-voltage accessories all need to be designed with a separate thermal management system to ensure normal operation, which requires the thermal management system solution to ensure the cooling performance of the air conditioner while taking into account the cost. And due to the increased complexity of the thermal management system, the energy consumption of the water pump, compressor, cooling fan, etc. in the system will also increase. The increase in energy consumption of these components will reduce the actual driving range of the power battery and the cooling effect of the air conditioner.

[0037] The present application provides a thermal management system, including: a four-way valve 100, a nine-way valve 200 and a plurality of circuits, wherein the plurality of circuits include an engine circuit 300, an electric drive assembly circuit 400, a battery circuit 500, a cooling circuit 600, a transmission circuit 700 and an air-conditioning circuit 800, the four-way valve 100 controls the water-cooled condenser 804 in the engine circuit 300 and the air-conditioning circuit 800 and the nine-way valve 200 to form different circuits, and the nine-way valve 200 controls the water-cooled condenser 804, the electric drive assembly circuit 400, the cooling circuit 600 and the battery circuit 500 to form different circuits through different communication modes, thereby meeting the functional requirements of the passenger compartment, the battery and the electric drive assembly under different working conditions, wherein the communication between the engine circuit 300 and the transmission circuit 700 is controlled by the four-way valve 100, wherein the two ports in the four-way valve 100 are respectively connected to The outlet and inlet of the engine circuit 300 are connected, and the other two ports of the four-way valve 100 are connected to the water-cooled condenser 804 and the nine-way valve 200 respectively. The nine-way valve 200 includes a first outlet 1 to a ninth outlet 9, which are numbered 1-9 respectively, and the first two adjacent ports outside the nine-way valve 200, namely the second outlet 2 and the eighth outlet 8, are respectively connected to the four-way valve 100 and the water-cooled condenser 804 after passing through the three-way valve 701 and the heater water pump 703 in the transmission circuit 700. The second two adjacent ports outside the nine-way valve 200, namely the third outlet 3 and the fifth outlet 5, are connected to the cooling circuit 600. The third two adjacent ports outside the nine-way valve 200, namely the fourth outlet 4 and the sixth outlet 6, are connected to the battery circuit 500. The remaining three ports of the nine-way valve 200, namely the seventh outlet 7, the first outlet 1 and the ninth outlet 9, are connected to the electric drive assembly circuit 400.

[0038] The engine circuit 300 is provided with an engine 301, an engine water pump 302 and a high-temperature radiator 303; the electric drive assembly circuit 400 is provided with an electric drive assembly, a DCDC (direct current / direct current converter) / OBC (on-board charger), a water-cooled intercooler 401, a motor water pump 402 and a low-temperature radiator 403; the battery circuit 500 is provided with a high-voltage battery pack 501, i.e., a battery and a battery water pump 502; the cooling circuit 600 and the air conditioning circuit 800 share a low-temperature cooler Chill er809, the transmission circuit 700 is provided with a three-way valve 701, a heater core 702, a heater water pump 703 and a one-way valve 704. The transmission circuit 700 also shares a water-cooled condenser 804 with the air-conditioning circuit 800. The three-way valve 701 is used to control the flow direction of a flowing medium such as water in the transmission circuit 700. The heater core 702 is used to heat the passenger compartment. The high-pressure passage of the air-conditioning circuit 800 is provided with a compressor 801, a first electromagnetic switch valve 802 and its corresponding air-cooled condenser 803, a first electromagnetic switch valve 803 and a first electromagnetic switch valve 804. Two electromagnetic switch valves 805 and their corresponding water-cooled condensers 804, an evaporator 807 and a low-temperature cooler Chiller 809 are arranged in the low-pressure passage of the air-conditioning circuit 800, and the high-pressure passage and the low-pressure passage are connected through the first electronic expansion valve 806 and the second electronic expansion valve 808 corresponding to the evaporator 807 and the low-temperature cooler Chiller 809 respectively, wherein the low-temperature radiator 403, the air-cooled condenser 803 and the high-temperature radiator 303 are sequentially arranged together at the front end heat dissipation module layout position of the vehicle, and a cooling fan is correspondingly arranged behind the high-temperature radiator 303 to further dissipate heat for the low-temperature radiator 403, the air-cooled condenser 803 and the high-temperature radiator 303. Compared with the solution of adding an engine thermal management system on the basis of the existing pure electric solution, the thermal management system provided in the present application improves the cooling effect of the air-conditioning system by setting the air-cooled condenser 803 and the water-cooled condenser 804, while reducing the number of valve components as a whole, thereby achieving cost reduction.

[0039] Table 1 is a summary table of different connection modes of the four-way valve 100 and the nine-way valve 200 of the embodiment of the present application and their corresponding main effects of thermal management, as shown in the following table, wherein the first column is the connection mode of the four-way valve 100, the second column is the specific connection mode of the nine-way valve 200, the third column is the working state of the warm air water pump 703, and the fourth column is the opening ratio of the three-way valve 701, wherein, when the opening ratio of the three-way valve 701 is 0%, the cooling medium flowing out of the water-cooled condenser 804 does not pass through the warm air core 702, but directly flows to the nine-way valve 200, and when the opening ratio of the three-way valve 701 is 100%, the cooling medium flowing out of the water-cooled condenser 804 only passes through the warm air core 702 , but does not flow to the nine-way valve 200. When the opening ratio of the three-way valve 701 is not 0% and not 100%, the cooling medium flowing out of the water-cooled condenser 804 flows to the nine-way valve 200 and passes through the heater core 702. The fifth column is the working state of the compressor 801, the sixth column is the working state of the first solenoid switch valve 802, the seventh column is the working state of the second solenoid switch valve 805, the eighth column is the working state of the first electronic expansion valve 806, the ninth column is the working state of the second electronic expansion valve 808, and the tenth column is the scene effect of thermal management. By switching different connection modes of the four-way valve 100 and the nine-way valve 200, the thermal management effect in different scenes can be achieved.

[0040]

[0041] Table 1

[0042] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0043] Embodiment 1

[0044] Figure 1A schematic diagram of a thermal management system provided in an embodiment of the present application in a first connection mode of a nine-way valve. In the first connection mode of the four-way valve 100, the first port 1 and the second port 2 are connected inside the four-way valve 100, that is, the outlet and the inlet of the engine circuit are connected through two ports in the four-way valve 100, so that the engine circuit 300 is not connected with other circuits. The third port 3 and the fourth port 4 are connected inside the four-way valve 100, so that the flow medium passing through the nine-way valve 200 or the heater core 702 flows directly to the water-cooled condenser 804 after passing through the heater water pump 703, and does not flow into the engine circuit 300. In the first connection mode of the nine-way valve 200, that is, mode one, the first outlet 1 and the second outlet 2 are connected inside the nine-way valve 200, the eighth outlet 8 and the seventh outlet 7 are connected, the third outlet 3 and the fourth outlet 4 are connected, the fifth outlet 5 and the sixth outlet 6 are connected, and the ninth outlet 9 is not connected with the ports of other nine-way valves 200.

[0045] Furthermore, in the first connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly with a higher load and the refrigeration of the passenger compartment are realized. When the heater water pump 703 is in the closed state, and the opening rate of the three-way valve 701 is 100%, the compressor 801 is in the working state, when the first electromagnetic switch valve 802 and the first electronic expansion valve 806 are in the working state, and the second electromagnetic switch valve 805 and the second electronic expansion valve 808 are in the closed state, the flow medium in the electric drive assembly circuit 400 absorbs the electric drive assembly under the action of the motor water pump 402. After the heat generated by the operation of the DCDC / OBC is collected, it enters the transmission circuit 700 through the nine-way valve 200. Since the opening rate of the three-way valve 701 is 100%, the flowing medium only passes through the one-way valve 704 in the transmission circuit 700, and then enters the low-temperature radiator 403 in the electric drive assembly circuit 400 through the nine-way valve 200 again. The heat in the flowing medium is transferred to the surrounding environment through the matching cooling fan, so that the flowing medium is cooled again by the water-cooled intercooler 401 under the action of the motor water pump 402, and then passes through the electric drive assembly. and DCDC / OBC to achieve cooling of the electric drive assembly with high load. For the flow medium in the engine circuit 300 that is not connected to other circuits, under the action of the engine water pump 302, after passing through the engine 301, the heat generated by the operation of the engine 301 is absorbed by the flow medium through the high-temperature radiator 303 and the cooling fan, and the flow medium after cooling is sent back to the engine 301 to achieve cooling of the engine 301. For the air conditioning circuit 800, the high-temperature and high-pressure gas formed by the refrigerant after being processed by the compressor 801 is After the refrigerant passes through the air-cooled condenser 803 corresponding to the first solenoid switch valve 802 and the cooling fan to quickly dissipate heat, the processing capacity of the high-temperature and high-pressure gaseous refrigerant is improved, and the high-temperature and high-pressure gaseous refrigerant is converted into a high-temperature and high-pressure liquid refrigerant. After the high-temperature and high-pressure liquid refrigerant passes through the liquid storage drying tank, it is cooled and reduced in pressure by the first electronic expansion valve 806 to form a low-temperature and low-pressure gas-liquid mixed refrigerant that passes through the evaporator 807 to reduce the temperature of the surrounding air to form cold air, which is sent into the passenger compartment to realize cooling of the passenger compartment, thereby effectively improving the cooling effect of the air conditioner.

[0046] Furthermore, in the first connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly with a smaller load and the refrigeration of the passenger compartment are realized. When the heater water pump 703 is in working state, and the opening rate of the three-way valve 701 is 0%, the compressor 801 is in working state, the first electromagnetic switch valve 802, the second electromagnetic switch valve 805 and the first electronic expansion valve 806 are all in working state, and the second electronic expansion valve 808 is in the closed state, the flow medium in the electric drive assembly circuit 400 absorbs the electric drive assembly and DCD under the action of the motor water pump 402. The heat generated by the C / OBC during operation passes through the nine-way valve 200 and enters the transmission circuit 700. Since the opening rate of the three-way valve 701 is 0%, the flowing medium passes through the four-way valve 100, the water-cooled condenser 804 and the three-way valve 701 in sequence under the action of the warm air water pump 703. The water-cooled condenser 804 can also be used to assist in processing the heat of the refrigerant in the air-conditioning circuit 800, and enters the low-temperature radiator 403 in the electric drive assembly circuit 400 through the nine-way valve 200 again. The heat in the flowing medium is transferred to the surrounding environment through the matching cooling fan, so that the flowing medium Under the action of the motor water pump 402, the medium passes through the water-cooled intercooler 401 to cool the flowing medium again, and then passes through the electric drive assembly and DCDC / OBC to cool the electric drive assembly with a smaller load. A direct connection passage connected in parallel with the transmission passage 700 is provided between the motor water pump 402 and the water-cooled intercooler 401, and a proportional valve 404 is provided on the direct connection passage to control the flow of the flowing medium through the electric drive assembly and DCDC / OBC, thereby realizing cooling control of the electric drive assembly and DCDC / OBC. For the air conditioning circuit 800, the refrigerant passes through the pressure The high-temperature and high-pressure gaseous refrigerant formed after being processed by the compressor 801 is converted into a high-temperature and high-pressure liquid refrigerant after rapid heat dissipation through the air-cooled condenser 803 and the cooling fan corresponding to the first electromagnetic switch valve 802, and the water-cooled condenser 804 corresponding to the second electromagnetic switch valve 805. The high-temperature and high-pressure liquid refrigerant passes through the liquid storage drying tank and is cooled and reduced in pressure by the first electronic expansion valve 806 to form a low-temperature and low-pressure gas-liquid mixed refrigerant that passes through the evaporator 807 to reduce the temperature of the surrounding air to form cold air, which is then sent into the passenger compartment to achieve cooling of the passenger compartment.

[0047] Furthermore, in the first connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly and the refrigeration of the battery are achieved. When the compressor 801 is in working condition, when the first solenoid switch valve 802 and the second electronic expansion valve 808 are in working condition, and the first electronic expansion valve 806 is in a closed condition, for the air-conditioning circuit 800, the high-temperature and high-pressure gaseous refrigerant formed by the refrigerant after being processed by the compressor 801 is converted into a high-temperature and high-pressure liquid refrigerant after the air-cooled condenser 803 corresponding to the first solenoid switch valve 802 and the cooling fan cooperate to quickly dissipate heat, and the high-temperature and high-pressure gaseous refrigerant is made to pass through the liquid storage drying tank and then pass through the second electronic expansion valve 808 to cool the refrigerant. After compression, a low-temperature and low-pressure gas-liquid mixed refrigerant is formed and passes through the low-temperature cooler Chiller809 to transfer part of the heat of the flowing medium in the cooling circuit 600 to the air-conditioning circuit 800, thereby realizing the cooling of the flowing medium in the cooling circuit 600, and making the cooled flowing medium flow to the battery water pump 502 and the high-voltage battery pack 501, wherein, after absorbing the heat generated by the high-voltage battery pack 501, the flowing medium in the battery circuit 500 is sent into the cooling circuit 600 again under the action of the battery water pump 502, and the heat generated by the high-voltage battery pack absorbed by the flowing medium is transferred to the air-conditioning circuit 800 through the low-temperature cooler Chiller809, thereby realizing the cooling of the high-voltage battery pack, that is, the battery.

[0048] Furthermore, in the first connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly and the simultaneous cooling of the battery and the passenger compartment are achieved. When the heater water pump 703 is in the closed state, the compressor 801 is in the working state, and when the first electronic expansion valve 806 and the second electronic expansion valve 808 are both in the working state, for the air conditioning circuit 800, the high-temperature and high-pressure gaseous refrigerant formed by the refrigerant after being processed by the compressor 801 is quickly cooled by the air-cooled condenser 803 corresponding to the first electromagnetic switch valve 802 and the cooling fan, or the high-temperature and high-pressure gaseous refrigerant is quickly cooled by the air-cooled condenser 803 corresponding to the first electromagnetic switch valve 802 and the water-cooled condenser 804 corresponding to the second electromagnetic switch valve 805, and the high-temperature and high-pressure gaseous refrigerant is converted into a high-temperature and high-pressure liquid refrigerant. After the high-temperature and high-pressure liquid refrigerant passes through the liquid storage drying tank, it is cooled and depressurized by the second electronic expansion valve 808 to form a low-temperature and low-pressure gas-liquid mixed refrigerant that passes through the low-temperature cooling machine C. Chiller809 is used to transfer the heat of the flowing medium in the cooling circuit 600 to the air-conditioning circuit 800, thereby cooling the flowing medium in the cooling circuit 600, and making the cooled flowing medium flow to the battery water pump 502 and the high-voltage battery pack 501. After absorbing the heat generated by the high-voltage battery pack, the flowing medium in the battery circuit 500 is sent to the cooling circuit 600 again under the action of the battery water pump 502, and the heat generated by the high-voltage battery pack absorbed by the flowing medium is transferred to the air-conditioning circuit 800 through the low-temperature cooler Chiller809, thereby cooling the high-voltage battery pack. After the high-temperature and high-pressure liquid refrigerant passes through the liquid storage drying tank, it is cooled and depressurized by the first electronic expansion valve 806 to form a low-temperature and low-pressure gas-liquid mixed refrigerant that passes through the evaporator 807 to reduce the temperature of the surrounding air to form cold air, which is sent into the passenger compartment to cool the passenger compartment, thereby realizing simultaneous cooling of the battery and the passenger compartment, thereby reducing the number of unnecessary valve combinations.

[0049] Furthermore, in the first connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly with a smaller load and the refrigeration and dehumidification of the passenger compartment are realized. When the heater water pump 703 and the heater core 702 are both in working state, and the opening ratio of the three-way valve 701 is not 0% and not 100%, the compressor 801 is in working state. When the first electromagnetic switch valve 802, the second electromagnetic switch valve 805 and the first electronic expansion valve 806 are in working state, and the second electronic expansion valve 808 is in closed state, the flow medium in the electric drive assembly circuit 400 absorbs the heat generated by the operation of the electric drive assembly and DCDC / OBC under the action of the motor water pump 402, and then passes through the nine-way valve 2 After 00, it enters the transmission circuit 700. Since the opening ratio of the three-way valve 701 is not 0% and not 100%, a part of the flowing medium also passes through the heater core 702, and part of the heat in the flowing medium is transferred to the surrounding environment through the heater core 702. Another part of the flowing medium enters the low-temperature radiator 403 in the electric drive assembly circuit 400 again through the nine-way valve 200, and the heat in the flowing medium is transferred to the surrounding environment through the matching cooling fan, so as to realize the cooling of the electric drive assembly with a smaller load, and in the air-conditioning circuit 800, through the evaporator 807 corresponding to the first electronic expansion valve 806, the ambient air temperature is reduced to form cold air, so as to realize the cooling and dehumidification of the passenger compartment.

[0050] In the second communication mode of the four-way valve 100 , the first port 1 is connected to the fourth port 4 , and the second port 2 is connected to the third port 3 , so that the engine circuit 300 is connected to the transmission circuit 700 .

[0051] Furthermore, in the second connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly with a higher load and the refrigeration and dehumidification of the passenger compartment are achieved. When the heater water pump 703 is in operation and the opening rate of the three-way valve 701 is 100%, the compressor 801 is in operation, and when the first solenoid switch valve 802 and the first electronic expansion valve 806 are in operation, and the second solenoid switch valve 805 and the second electronic expansion valve 808 are in a closed state, the flow medium in the electric drive assembly circuit 400 flows out of the electric drive assembly, passes through the nine-way valve 200, and only passes through the one-way valve 704 in the transmission circuit 700, and flows into the low-temperature radiator 403 in the electric drive assembly circuit 400 again, so as to achieve the cooling of the electric drive assembly with a higher load, and for the engine circuit 300 from the engine, the flow medium in the electric drive assembly circuit 400 flows out of the electric drive assembly, passes through the nine-way valve 200, passes through the one-way valve 704 in the transmission circuit 700, and flows into the low-temperature radiator 403 in the electric drive assembly circuit 400 again, so as to achieve the cooling of the electric drive assembly with a higher load. The flow medium flowing out of the engine 301 enters the water-cooled condenser 804 through the four-way valve 100 to transfer the heat generated by the engine 301 in the flow medium to the surrounding environment. Since the opening rate of the three-way valve 701 is 100%, the flow medium flowing out of the water-cooled condenser 804 only flows to the heater core 702 at this time, and part of the heat in the flow medium is transferred to the surrounding environment through the heater core 702. Under the action of the heater water pump 703, the cooled flow medium passes through the four-way valve 100 again and flows into the engine circuit 300 to cool the engine. In the air-conditioning circuit 800, the evaporator 807 corresponding to the first electronic expansion valve 806 is used to reduce the ambient air temperature to form cold air, thereby realizing cooling and dehumidification of the passenger compartment, thereby effectively improving the cooling effect of the air conditioner.

[0052] Furthermore, based on the cooling of the engine, the electric drive assembly with a higher load, and the refrigeration and dehumidification of the passenger compartment, when the battery needs to be cooled, the first solenoid switch valve 802, the first electronic expansion valve 806 and the second electronic expansion valve 808 are in working condition, and the second solenoid switch valve 805 is in closed condition. After absorbing the heat generated by the high-voltage battery pack, the flow medium in the battery circuit 500 is sent into the cooling circuit 600 under the action of the battery water pump 502, and the heat generated by the high-voltage battery pack absorbed in the flow medium is transferred to the air-conditioning circuit 800 through the low-temperature cooler Chiller 809, thereby realizing the cooling of the high-voltage battery pack, that is, the battery.

[0053] Furthermore, when the range-extended vehicle is in the pure electric operation mode, the engine cold machine is not started, and in the second connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the electric drive assembly with a higher load and the refrigeration of the passenger compartment are achieved. When the heater water pump 703 is in a working state, and the opening rate of the three-way valve 701 is 0%, the compressor 801 is in a working state, when the first solenoid switch valve 802, the second solenoid switch valve 805 and the first electronic expansion valve 806 are in a working state, and the second electronic expansion valve 808 is in a closed state, the flow medium in the electric drive assembly circuit 400 flows out of the electric drive assembly and passes through the nine-way valve 200. Under the action of the heater water pump 703, the flow medium passes through the four-way valve 400 and then passes through the cold machine state. The heat flows through the engine, water-cooled condenser 804, and three-way valve 701, and then passes through the nine-way valve 200 again, and flows to the low-temperature radiator 403 in the electric drive assembly circuit 400 to cool the electric drive assembly with a higher load. The engine in the cold machine state also takes away part of the heat in the flowing medium. In the air-conditioning circuit 800, the evaporator 807 corresponding to the first electronic expansion valve 806 is used to reduce the ambient air temperature to form cold air, thereby cooling the passenger compartment. The air-cooled condenser 803 corresponding to the first electromagnetic switch valve 802 and the water-cooled condenser 804 corresponding to the second electromagnetic switch valve 805 jointly process the high-temperature and high-pressure gaseous refrigerant formed by the compressor 801, thereby enhancing the refrigeration capacity of the air-conditioning system.

[0054] Furthermore, when the range-extended vehicle is in the pure electric operation mode, the engine is shut down and does not start, and in the second connection mode of the four-way valve and the first connection mode of the nine-way valve, the cooling of the electric drive assembly with a higher load and the battery refrigeration are achieved. When the heater water pump 703 is in operation, and the opening rate of the three-way valve 701 is 0%, the compressor 801 is in operation, and the first solenoid switch valve 802, the second solenoid switch valve 805 and the second electronic expansion valve 808 are in operation, and the first electronic expansion valve 806 is in a closed state, the flow medium in the battery circuit 500 absorbs the heat generated by the operation of the high-voltage battery pack. , is sent into the cooling circuit 600 under the action of the battery water pump 502, and the heat generated by the high-voltage battery pack absorbed in the flowing medium is transferred to the air-conditioning circuit 800 through the low-temperature cooler Chiller809, thereby realizing the cooling of the high-voltage battery pack, that is, the battery. Furthermore, when the first solenoid switch valve 802, the second solenoid switch valve 805 and the first electronic expansion valve 806 are in the working state, and the second electronic expansion valve 808 is in the closed state, the evaporator 807 corresponding to the first electronic expansion valve 806 is used to reduce the ambient air temperature to form cold air, thereby realizing the cooling and dehumidification of the passenger compartment.

[0055] In the pure electric operation mode, when the engine is in a cold shutdown state, when the electric drive load is large or the battery and passenger compartment cooling demand is large, the coolant, i.e., the flowing medium, passes through the engine through the four-way valve 100 and transfers part of the heat generated by the operation of the electric drive assembly absorbed in the flowing medium to the engine, thereby reducing the cooling load of the low-temperature radiator 403 in the electric drive assembly circuit 400, thereby reducing the speed of the cooling fan, thereby reducing the energy consumption of the entire vehicle.

[0056] When the engine is in a shutdown state and the battery or passenger compartment needs to be heated, the four-way valve is used to transfer part of the heat of the engine cylinder to the flowing medium when the flowing medium passes through the engine. Combined with the switching of the nine-way valve 200 mode, the heat of the engine is recovered to the battery or the passenger compartment, thereby reducing the power of the compressor, thereby reducing the energy consumption of the entire vehicle and improving the energy utilization efficiency.

[0057] Embodiment 2

[0058] Figure 2 A schematic diagram of the thermal management system provided in an embodiment of the present application in the second connection mode of the nine-way valve. In the second connection mode of the nine-way valve 200, that is, mode two, the first outlet 1 is connected with the second outlet 2, the eighth outlet 8 is connected with the sixth outlet 6, the third outlet 3 is connected with the fourth outlet 4, the fifth outlet 5 is connected with the seventh outlet 7, and the ninth outlet 9 is not connected with the ports of other nine-way valves 200.

[0059] Furthermore, in the second connection mode of the four-way valve and the second connection mode of the nine-way valve, the cooling of the engine and the electric drive assembly with a higher load, the refrigeration and dehumidification of the passenger compartment, and the heating of the battery are achieved. When the heater water pump 703 is in operation and the opening rate of the three-way valve 701 is 100%, the compressor 801 is in operation, and when the first solenoid switch valve 802, the second solenoid switch valve 805, the first electronic expansion valve 806 and the second electronic expansion valve 808 are all in operation, the flow medium in the battery circuit 500 passes through the high-voltage battery pack and then flows into the low-temperature cooler Chiller 809 in the cooling circuit 600 through the nine-way valve 200, so as to transfer part of the heat generated by the high-voltage battery pack in the flow medium to the air-conditioning circuit 800. After passing through the low-temperature cooler Chiller 809, the moving medium flows to the low-temperature radiator 403 in the electric drive assembly circuit 400 to transfer another part of the heat generated by the high-voltage battery pack in the flowing medium to the surrounding environment, and under the action of the motor water pump 402, it flows into the electric drive assembly and DCDC / OBC again through the water-cooled intercooler 401, thereby realizing the cooling of the electric drive assembly. After the flowing medium flowing out of the electric drive assembly passes through the nine-way valve 200 and the one-way valve 704, it flows to the battery circuit 500 again, and passes through the high-voltage battery pack under the action of the battery water pump 502. Since there is heat generated by the operation of the electric drive assembly in the flowing medium at this time, the high-voltage battery pack, that is, the battery, is heated, thereby reducing the number of unnecessary valve component combinations and reducing costs.

[0060] Embodiment 3

[0061] Figure 3 The schematic diagram of the thermal management system provided in the embodiment of the present application in the third connection mode of the nine-way valve is shown. In the third connection mode of the nine-way valve 200, that is, mode 3, the first outlet 1 is connected to the third outlet 3, the eighth outlet 8 is connected to the sixth outlet 6, the second outlet 2 is connected to the fourth outlet 4, the fifth outlet 5 is connected to the seventh outlet 7, and the ninth outlet 9 is not connected to the ports of other nine-way valves 200, wherein the fifth outlet 5 is connected to the seventh outlet 7, and the first outlet 1 is connected to the third outlet 3, that is, the cooling circuit 600 is connected to the first inlet and the first outlet in the electric drive assembly circuit 400, so that the flow medium in the electric drive assembly circuit flows through the low-temperature radiator 403. The first inlet in the electric drive assembly circuit 400 is connected to the seventh outlet 7 of the nine-way valve 200, and the first outlet is connected to the first outlet 1 of the nine-way valve 200.

[0062] Furthermore, in the first connection mode of the four-way valve and the third connection mode of the nine-way valve, when the ambient temperature is high, that is, the outlet water temperature of the low-temperature cooler Chiller 809 is lower than the ambient temperature, and the battery temperature requirement is high, the engine warm-up, electric drive cooling and battery heating are achieved. When the heater water pump 703 is in a closed state, and the opening rate of the three-way valve 701 is 0%, the compressor 801 is in a working state, when the first solenoid switch valve 802 and the first electronic expansion valve 806 are in a closed state, and the second solenoid switch valve 805 and the second electronic expansion valve 808 are in a working state, the flow medium flowing out of the electric drive assembly in the electric drive assembly circuit 400 passes through the nine-way valve 200 and then passes through the low-temperature cooler Chiller 809 in the cooling circuit 600. At this time, the temperature of the flow medium flowing out of the low-temperature cooler Chiller 809 is lower than the ambient temperature. The flow medium flowing out of the low-temperature cooler Chiller 809 passes through the nine-way valve 200 and enters the low-temperature radiator 403 and the water-cooled intercooler 401 in the electric drive assembly circuit 400, thereby cooling the electric drive assembly. For the flow medium in the engine circuit 300, the engine circuit 300 is not connected to other circuits at this time, and the high-temperature radiator 303 does not work at this time, so that the heat in the engine circuit 300 continues to rise, and the engine is warmed up. In the battery circuit 500, the flow medium flowing out of the high-voltage battery pack passes through the nine-way valve 200 and flows to the warm air water pump 703 in the transmission circuit 700. Under the action of the warm air water pump 703, it passes through the water-cooled condenser 804 and the three-way valve 701 and flows into the battery circuit 500 again, so that the heat in the battery circuit 500 continues to rise, and the high-voltage battery pack, that is, the battery, is heated.

[0063] Furthermore, in the second connection mode of the four-way valve and the third connection mode of the nine-way valve, when the ambient temperature is high and the demand for heating the passenger compartment is high, the engine warm-up, electric drive cooling and passenger compartment heating are achieved. When the heater water pump 703 is in operation, and the opening rate of the three-way valve 701 is 100%, the compressor 801 is in operation, and when the first electromagnetic switch valve 802 and the first electronic expansion valve 806 are in the closed state, and the second electromagnetic switch valve 805 and the second electronic expansion valve 808 are in operation, for the flow medium in the engine circuit 300, at this time, the engine circuit 300 and The transmission circuit 700 is connected, and the high-temperature radiator 303 is not working at this time, so that the flow medium flowing out of the engine 301 flows through the four-way valve 100 to the water-cooled condenser 804, the three-way valve 701 and the heater core 702 in the transmission circuit 700, and heats the passenger compartment through the heater core 702. Under the action of the heater water pump 703, the flow medium flows to the engine circuit 300 again, so that the heat in the engine circuit 300 continues to rise, thereby warming up the engine. Among them, when the opening rate of the three-way valve 701 is not 0% and not 100%, simultaneous heating of the battery and the passenger compartment is achieved.

[0064] Embodiment 4

[0065] Figure 4 The schematic diagram of the thermal management system provided in the embodiment of the present application in the fourth connection mode of the nine-way valve is shown. In the fourth connection mode of the nine-way valve 200, that is, mode 4, the first outlet 1 is connected to the third outlet 3, the eighth outlet 8 is connected to the sixth outlet 6, the second outlet 2 is connected to the fourth outlet 4, the fifth outlet 5 is connected to the ninth outlet 9, and the seventh outlet 7 is not connected to the ports of other nine-way valves 200, wherein the first outlet 1 is connected to the third outlet 3, and the fifth outlet 5 is connected to the ninth outlet 9, so that the cooling circuit 600 is connected to the second inlet and the first outlet in the electric drive assembly circuit 400, so that the flowing medium in the electric drive assembly circuit 400 does not flow through the low-temperature radiator 403. The second inlet in the electric drive assembly circuit 400 is connected to the ninth outlet 9 of the nine-way valve 200, and the first outlet is connected to the first outlet 1 of the nine-way valve 200.

[0066] Furthermore, in the second connection mode of the four-way valve and the fourth connection mode of the nine-way valve, engine cooling, electric drive heat storage and passenger compartment heating are achieved. When the heater water pump 703 is in operation and the opening rate of the three-way valve 701 is 100%, the compressor 801 is in a closed state, and when the first solenoid switch valve 802, the second solenoid switch valve 805, and the first electronic expansion valve 806 and the second electronic expansion valve 808 are all in a closed state, for the flowing medium in the engine circuit 300, the engine circuit 300 is connected with the transmission circuit 700, and the high-temperature radiator 303 is not working at this time, so that the flowing medium flowing out of the engine 301 flows to the water-cooled condenser in the transmission circuit 700 through the four-way valve 100. The heater core 702 is used to heat the passenger compartment, wherein the heat generated by the operation of the engine in the flowing medium is transferred to the surrounding environment through the water-cooled condenser 804 and the heater core 702, thereby realizing engine cooling. After the flowing medium in the electric drive assembly circuit 400 flows out of the electric drive assembly, it flows to the cooling circuit 600 through the nine-way valve 200. At this time, Chliier 809 is not working, so that the heat generated by the operation of the electric drive assembly in the flowing medium is not transferred to the surrounding environment, thereby making the electric drive store heat. When the opening rate of the three-way valve 701 is not 0% and not 100%, engine cooling, electric drive heat storage and battery heating are realized.

[0067] Furthermore, in the first connection mode of the four-way valve and the fourth connection mode of the nine-way valve, when the ambient temperature is low, that is, the outlet water temperature of the low-temperature cooler Chiller 809 is higher than the ambient temperature, and the battery temperature requirement is high, the engine warm-up, electric drive heat storage and battery heating are achieved. When the heater water pump 703 is in a closed state, and the opening rate of the three-way valve 701 is 0%, the compressor 801 is in a working state, when the first electromagnetic switch valve 802 and the first electronic expansion valve 806 are in a closed state, and the second electromagnetic switch valve 805 and the second electronic expansion valve 808 are in a working state, the flow medium flowing out of the electric drive assembly in the electric drive assembly circuit 400 passes through the nine-way valve 200 and passes through the low temperature in the cooling circuit 600. Chiller 809, although part of the heat in the flowing medium is transferred to the air-conditioning circuit 800 through the low-temperature cooler Chiller 809, the residual heat in the flowing medium in the cooling circuit 600 is still relatively high, so that the flowing medium temperature in the air-conditioning circuit 800 is higher than the ambient temperature when flowing out of the low-temperature cooler Chiller 809, and the flowing medium flowing out of the low-temperature cooler Chiller 809 enters the electric drive assembly circuit 400 through the nine-way valve 200, and then flows to the electric drive assembly and DCDC / OBC again under the action of the motor water pump 402, so that the electric drive assembly can be heat stored under the combined action of the residual heat in the flowing medium and the heat generated by the operation of the electric drive assembly.

[0068] Furthermore, in the second connection mode of the four-way valve and the fourth connection mode of the nine-way valve, when the ambient temperature is low and the demand for heating the passenger compartment is high, the engine warm-up, electric drive heat storage and passenger compartment heating are realized. When the heater water pump 703 is in operation, and the opening rate of the three-way valve 701 is 100%, the compressor 801 is in operation, when the first electromagnetic switch valve 802 and the first electronic expansion valve 806 are in the closed state, and the second electromagnetic switch valve 805 and the second electronic expansion valve 808 are in the operating state, the engine return The flowing medium in the circuit 300, at this time, the engine circuit 300 is connected with the transmission circuit 700, and the high-temperature radiator 303 is not working at this time, so that the flowing medium flowing out of the engine 301 flows to the water-cooled condenser 804, the three-way valve 701 and the heater core 702 in the transmission circuit 700 through the four-way valve 100, and heats the passenger compartment through the heater core 702. After the flowing medium flowing out of the electric drive assembly in the electric drive assembly circuit 400 passes through the nine-way valve 200, it passes through the low-temperature cooling medium in the cooling circuit 600 shared with the air conditioning circuit 800. The cooling machine Chiller 809 is turned on. At this time, although part of the heat in the flowing medium is transferred to the air conditioning circuit 800 through the low-temperature cooling machine Chiller 809, the remaining heat in the flowing medium of the cooling circuit 600 is still relatively high, so that the flowing medium temperature in the air conditioning circuit 800 is still higher than the ambient temperature when it flows out of the low-temperature cooling machine Chiller 809. The flowing medium flowing out of the low-temperature cooling machine Chiller 809 enters the electric drive assembly circuit 400 through the nine-way valve 200 and then flows into the motor. Under the action of the water pump 402, it flows to the electric drive assembly and DCDC / OBC again. Under the combined action of the residual heat in the flowing medium and the heat generated by the operation of the electric drive assembly, heat storage of the electric drive assembly is achieved. Among them, when the opening rate of the three-way valve 701 is not 0% and not 100%, engine warm-up, electric drive heat storage, and simultaneous heating of the passenger compartment and battery are achieved. By controlling the different internal connection modes of the four-way valve 100 and the nine-way valve 200, the number of unnecessary valve combinations is reduced, and the energy utilization efficiency is improved at the same time.

[0069] Of course, the nine-way valve 200 also has other connection modes, such as connecting the first outlet 1 with the second outlet 2, the fourth outlet 4 with the third outlet 3, the eighth outlet 8 with the sixth outlet 6, the fifth outlet 5 with the ninth outlet 9, and the seventh outlet 7 not being connected to the ports of other nine-way valves 200, and there are other different control modes between the first solenoid switch valve 802, the second solenoid switch valve 805, the first electronic expansion valve 806 and the second electronic expansion valve 808 to achieve other different thermal management scene effects. The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

[0070] Finally, it should be noted that: although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system, applied to a range-extended vehicle, the range-extended vehicle comprising an engine, an electric drive assembly, a four-way valve, a nine-way valve, a battery and a passenger compartment, characterized in that: The thermal management system comprises: an engine circuit for regulating the temperature of said engine; An electric drive assembly circuit, used to adjust the temperature of the electric drive assembly; A battery circuit for regulating the temperature of the battery; A cooling circuit, used to assist in regulating the temperature of the battery and the temperature of the electric drive assembly; A transmission circuit, used for connecting the four-way valve and the nine-way valve; An air conditioning circuit, used for adjusting the temperature of the passenger compartment, the air conditioning circuit comprising an air-cooled condenser and a water-cooled condenser, wherein the air conditioning circuit and the transmission circuit share the water-cooled condenser, and the cooling circuit and the air conditioning circuit share a low-temperature cooler Chiller; The four-way valve is used to control the engine circuit, the water-cooled condenser and the nine-way valve to form different circuits; The nine-way valve is used to control the water-cooled condenser, the electric drive assembly circuit, the cooling circuit and the battery circuit to form different circuits.

2. The thermal management system according to claim 1, characterized in that: The four-way valve comprises four ports, two ports of which are respectively connected to the outlet and the inlet of the engine circuit, and the other two ports of the four-way valve are respectively connected to the water-cooled condenser and the nine-way valve.

3. The thermal management system according to claim 1, characterized in that: Two ports of the nine-way valve are connected to the four-way valve and the water-cooled condenser respectively, the other two ports of the nine-way valve are connected to the cooling circuit respectively, two more ports of the nine-way valve are connected to the battery circuit, and the remaining three ports of the nine-way valve are connected to the electric drive assembly circuit.

4. The thermal management system according to claim 1, characterized in that: The engine circuit is provided with a high-temperature radiator to cool the engine, and the transmission circuit is provided with a three-way valve and a warm air water pump, wherein the three-way valve is used to adjust the flow direction of the flowing medium in the transmission circuit, and the warm air water pump is used to transmit the flowing medium in the transmission circuit.

5. The thermal management system according to claim 4, characterized in that: The air-conditioning circuit includes a high-pressure passage and a low-pressure passage. The high-pressure passage is connected in parallel with a plurality of electronic expansion valves, a plurality of electromagnetic switch valves, and a water-cooled condenser and an air-cooled condenser corresponding to each of the electromagnetic switch valves. The low-pressure passage is connected in parallel with the low-temperature cooler Chiller and an evaporator. The high-pressure passage and the low-pressure passage are connected through the plurality of electronic expansion valves.

6. The thermal management system according to claim 4, characterized in that: The electric drive assembly circuit includes a low-temperature radiator, an electric drive assembly, a water-cooled intercooler and a motor water pump, wherein the electric drive assembly, the water-cooled intercooler and the motor water pump are connected in series.

7. The thermal management system according to claim 4, characterized in that: The battery circuit includes a high-voltage battery pack and a battery water pump, wherein the battery water pump is used to transport a flow medium in the battery circuit.

8. The thermal management system according to claim 4, characterized in that: In the first communication mode of the four-way valve, the engine circuit is not connected to the transmission circuit; In the second communication mode of the four-way valve, the engine circuit is communicated with the transmission circuit.

9. The thermal management system according to claim 8, characterized in that: In the first communication mode of the nine-way valve, the transmission circuit is connected to the electric drive assembly circuit, and the cooling circuit is connected to the battery circuit.

10. The thermal management system according to claim 8, characterized in that: In the second connection mode of the nine-way valve, the transmission circuit and the battery circuit are connected, and the electric drive assembly circuit and the cooling circuit are connected in series.

11. The thermal management system according to claim 8, characterized in that: In the third connection mode of the nine-way valve, the transmission circuit is connected to the battery circuit, and the cooling circuit is connected to the first inlet and the first outlet of the electric drive assembly circuit, so that the flow medium in the electric drive assembly circuit flows through the low-temperature radiator.

12. The thermal management system according to claim 8, characterized in that: In the fourth connection mode of the nine-way valve, the transmission circuit is connected to the battery circuit, and the cooling circuit is connected to the second inlet and the first outlet of the electric drive assembly circuit, so that the flow medium in the electric drive assembly circuit does not flow through the low-temperature radiator.

13. A vehicle, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 12.

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