Multi-way valve thermal management system and automobile

Abstract

The present invention discloses a multi-way valve thermal management system and an automobile. A heat exchanger, low-temperature radiator, condenser, water-heating PTC, heater core, and power battery pack are all connected to the multi-way valve via a flow channel plate to form a circuit. The multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states: the motor-controlled cooling device, low-temperature radiator, and multi-way valve are connected in series to form a motor-controlled branch; the heat exchanger and multi-way valve are connected in series to form a heat exchanger branch; the power battery pack and multi-way valve are connected in series to form a battery branch; the condenser, water-heating PTC, heater core, and multi-way valve are connected in series to form a passenger compartment heating branch; the motor-controlled branch and heat exchanger branch are interconnected via the multi-way valve to form a first circuit; the battery branch is connected via the multi-way valve to form a second circuit; and the connecting pipeline between the passenger compartment heating branch and the multi-way valve is closed, with a bypass pipe controlled by a first proportional three-way valve forming a third circuit. This invention improves the integration of the coolant circuit and reduces the number of components.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management of new energy vehicles, and in particular to a multi-way valve thermal management system and an automobile. Background Art

[0002] As fuel prices continue to rise, the penetration rate of new energy vehicles is also increasing. As enthusiasm for purchasing new energy vehicles grows, people are also paying more and more attention to the battery life and safety of new energy vehicles.

[0003] The thermal management function of traditional fuel vehicles is single, the system involves fewer components, and the system functions are relatively simple.

[0004] New energy vehicles are powered by electricity, and maintaining passenger compartment cooling, maintaining battery pack temperature balance, and cooling the motor and electronic controls all require energy. Compared to traditional fuel-powered vehicles, energy management involves more complex systems and involves more complex aspects. Therefore, thermal management is increasingly crucial for improving energy efficiency, ensuring vehicle range, and ensuring battery pack safety.

[0005] Among them, the thermal management system includes a refrigerant circuit and a coolant circuit, among which the coolant circuit plays an important role in the new energy thermal management system.

[0006] Existing thermal management systems for new energy vehicles are still primarily decentralized. Coolant heat is primarily exchanged between functional components such as the passenger compartment, battery, and motor, and these components operate in separate circuits. To achieve connectivity between these circuits, multiple three-way and four-way valves are used within the circuits. These valves are combined and switched to achieve different system functions.

[0007] Because thermal management system components are dispersed throughout the vehicle, connected by piping and then fixed to the vehicle, this dispersed layout results in low system integration. For vehicle manufacturers, this creates a wide variety of materials, significant space requirements, and complex system control, leading to inefficient energy utilization. This ultimately results in long thermal management system development cycles, high costs, complex vehicle assembly, and inconvenient maintenance.

[0008] In addition, motor and electronic control components are usually the main components of new energy vehicles. The temperature of their application environment affects the working state of the motor and electronic control components. During the operation of new energy vehicles, the motor and electronic control will generate excess heat, and excessive temperature will cause the motor and electronic control to fail, resulting in loss of control of the new energy vehicle.

[0009] Therefore, in the vehicle thermal management system, how to improve the integration of the coolant circuit, reduce the number of components, and coordinate the management of decentralized thermal management systems to reduce energy waste and reduce the heat generated by the motor and electronic control has become a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0010] In view of the problems in the prior art of low coolant circuit integration, complex structure and excess heat generated by the motor and electronic control, the present application provides a multi-way valve thermal management system and a vehicle.

[0011] To achieve the above objectives, the present invention discloses a multi-way valve thermal management system, including a heat exchanger, a motor electronic control cooling device, a low-temperature radiator, a condenser, a water heating PTC, a heater core and a power battery pack.

[0012] The heat exchanger, the motor electronically controlled cooling device, the low-temperature radiator, the condenser, the water-heating PTC, the heater core, and the power battery pack are all connected to a multi-way valve through a flow channel plate to form a loop for circulating the coolant.

[0013] The multi-way valve includes at least one movable valve core, through which the plurality of pipelines can be switched to be connected or closed;

[0014] The multi-way valve at least includes the movable valve core that switches the plurality of pipelines to the following states:

[0015] The motor electronically controlled cooling device, the low-temperature radiator and the multi-way valve are connected in series to form a motor electronically controlled branch circuit;

[0016] The heat exchanger and the multi-way valve are connected in series to form a heat exchanger branch;

[0017] The power battery pack and the multi-way valve are connected in series to form a battery branch circuit;

[0018] The condenser, the water heating PTC, the heater core and the multi-way valve are connected in series to form a passenger compartment heating branch;

[0019] The motor electronic control branch and the heat exchanger branch are connected to each other through the multi-way valve to form a first circuit;

[0020] The battery branch forms a second circuit through the multi-way valve;

[0021] The connecting pipeline between the passenger compartment heating branch and the multi-way valve is closed, and a third loop is formed through a bypass pipe controlled by a first proportional three-way valve.

[0022] The application of the present invention improves the integration of the coolant circuit, reduces the number of components of the thermal management system, reduces the occupied space of the thermal management system, and comprehensively manages the decentralized thermal management systems to reduce energy waste.

[0023] Furthermore, the present invention interconnects the motor electronic control branch with the heat exchanger path, so that the heat exchanger can recover the heat generated by the motor electronic control cooling device, thereby cooling the motor electronic control and achieving efficient use of heat.

[0024] Preferably, the multi-way valve includes a C1 interface, a C2 interface, a C3 interface, a C4 interface, a C5 interface, a C6 interface, a C7 interface and a C8 interface;

[0025] The C1 interface and the C2 interface are connected to the outlet and inlet of the passenger compartment heating branch circuit respectively;

[0026] The C3 interface and the C4 interface are connected to the inlet and outlet of the battery branch respectively;

[0027] The C5 interface and the C6 interface correspond to the inlet and outlet of the heat exchanger branch respectively;

[0028] The C7 interface and the C8 interface correspond to the inlet and outlet of the motor electronic control branch respectively;

[0029] The C3 interface and the C4 interface are interconnected, the C5 interface and the C8 interface are interconnected, and the C6 interface and the C7 interface are interconnected;

[0030] The outlet and inlet of the passenger compartment heating branch of the C1 interface and the C2 interface are completely closed

[0031] Preferably, the motor electronically controlled cooling device and the low-temperature radiator connected end to end are connected to the pipeline of the multi-way valve, the condenser, the water heating PTC and the heater core connected in sequence are connected to the pipeline of the multi-way valve, and the pipeline connecting the power battery pack to the multi-way valve are all provided with a coolant circulation water pump.

[0032] Preferably, the low-temperature radiator is connected in parallel with a short-circuit bypass controlled by a second proportional three-way valve, and the flow rate of the corresponding coolant is distributed through the second proportional three-way valve.

[0033] Preferably, a circuit for flowing refrigerant is provided between the heat exchanger and the condenser;

[0034] When the passenger compartment heating branch is in the passenger compartment heating or dehumidification mode, the heat comes from the condenser. If the heat is insufficient, the water heating PTC works to heat the coolant in the passenger compartment heating branch to meet the demand for warm air.

[0035] The refrigerant transfers the heat it carries to the coolant in the passenger compartment heating branch through the condenser.

[0036] More preferably, the circuit through which the refrigerant flows is provided with an evaporator, the heater core and the evaporator are assembled together and provided with a blower; and / or, the circuit through which the refrigerant flows is provided with an outdoor heat exchanger;

[0037] The blower, the heater core and the evaporator are arranged in the air-conditioning box; the blower is used to accelerate the air passing through the heater core and the evaporator to achieve heat exchange.

[0038] Preferably, a condensing fan is provided at the low-temperature radiator;

[0039] The condensing fan is used to assist in heat dissipation; and / or,

[0040] The heater core is provided with a blower, the blower and the heater core; the blower is used to accelerate the air passing through the heater core to achieve heat exchange.

[0041] Preferably, the flow channel plate includes a plurality of flow channels for conveying coolant, and the plurality of flow channels are arranged parallel to each other and one end of each is connected to the multi-way valve, and the other end of each is connected to the corresponding heat exchanger, the motor electronic control cooling device, the low-temperature radiator, the condenser, the water heating PTC, the heater core or the power battery pack.

[0042] The present invention also provides an automobile, which adopts any one of the multi-way valve thermal management systems described above.

[0043] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A structural diagram of an embodiment of the present invention is shown.

[0045] Figure 2 A schematic diagram shows a state in which the heat exchanger is operating in operating condition 1 of an embodiment of the present invention, the passenger compartment heating branch is heating or dehumidifying, the motor electronic control branch is connected in series with the heat exchanger, and indirect recovery of waste heat is achieved through a short-circuit bypass controlled by a second proportional three-way valve.

[0046] Figure 3 A schematic diagram showing the cooling or blowing state of the passenger compartment heating branch when the heat exchanger is not working in working condition 2 of an embodiment of the present invention.

[0047] Figure 4 A schematic diagram showing the heating or dehumidifying state of the passenger compartment heating branch when the heat exchanger is not working in working condition 3 in one embodiment of the present invention.

[0048] Figure 5 A schematic diagram of a refrigerant connection circuit in one embodiment of the present invention is shown.

[0049] Figure 6 A schematic diagram of the arrangement of interfaces of a multi-way valve in one embodiment of the present invention is shown.

[0050] Figure 7 A schematic diagram showing the interface connection mode of a multi-way valve in one embodiment of the present invention is shown.

[0051] Among them, 1. heat exchanger; 2. motor electronic control cooling device; 3. low-temperature radiator; 4. condenser; 5. water heating PTC; 6. heater core; 7. power battery pack; 8. coolant circulation water pump; 9. evaporator; 10. motor electronic control branch; 11. battery branch; 12. passenger compartment heating branch; 13. heat exchanger branch; 14. outdoor heat exchanger; 15. first proportional three-way valve; 16. bypass pipe; 17. second proportional three-way valve. DETAILED DESCRIPTION

[0052] Example

[0053] like Figures 1 to 4 As shown, the multi-way valve thermal management system includes a heat exchanger 1, a motor electronic control cooling device 2, a low-temperature radiator 3, a condenser 4, a water heating PTC 5, a heater core 6 and a power battery pack 7.

[0054] Among them, the heat exchanger 1, the motor electronic control cooling device 2, the low-temperature radiator 3, the condenser 4, the water heating PTC 5, the heater core 6 and the power battery pack 7 are all connected to the multi-way valve through the flow channel plate to form a loop for circulating the coolant;

[0055] The multi-way valve includes at least one movable valve core, which switches the connection or closure between multiple pipelines through the movable valve core;

[0056] The multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states:

[0057] The motor electronic control cooling device 2, the low-temperature radiator 3 and the multi-way valve are connected in series to form a motor electronic control branch 10;

[0058] The heat exchanger 1 is connected in series with the multi-way valve to form a heat exchanger branch 13;

[0059] The power battery pack 7 is connected in series with the multi-way valve to form a battery branch 11;

[0060] The condenser 4, the water heating PTC 5, the heater core 6 and the multi-way valve are connected in series to form a passenger compartment heating branch 12;

[0061] The motor electronic control branch 10 and the heat exchanger branch 13 are interconnected through a multi-way valve to form a first circuit;

[0062] The battery branch 11 forms a second circuit through a multi-way valve;

[0063] The connecting pipeline between the passenger compartment heating branch 12 and the multi-way valve is closed, and a third circuit is formed through a bypass pipe 16 controlled by a first proportional three-way valve 15.

[0064] The application of the present invention improves the integration of the coolant circuit, reduces the number of components of the thermal management system, and comprehensively manages the dispersed thermal management systems to reduce energy waste.

[0065] Furthermore, the present invention interconnects the motor electronic control branch 10 and the heat exchanger branch 13, so that the heat exchanger 1 can utilize or assist in discharging the heat generated by the motor electronic control cooling device 2, which helps to achieve uniform temperature of the power battery pack 7 and cooling of the motor electronic control cooling device 2, thereby realizing efficient utilization of heat.

[0066] In practical applications, heat exchanger 1 is typically a plate-type heat exchanger, typically equipped with channels for coolant and refrigerant. Its primary function is to exchange heat between the coolant and refrigerant. Condenser 4 is typically an indirect condenser (I-COND) with four ports: two for coolant, connected to the coolant circuit; the other two for refrigerant, connected to the refrigerant circuit. A water-heating PTC 5 heats the coolant. The coolant then exchanges heat with the air through a heater core 6.

[0067] In some embodiments, a short-circuit bypass controlled by a second proportional three-way valve 17 is connected in parallel to the low-temperature radiator 3, and the corresponding coolant flow rate is distributed through the second proportional three-way valve 17. When the coolant flows through the low-temperature radiator 3, the second proportional three-way valve 17 is closed; when the coolant does not pass through the low-temperature radiator 3 but passes through the short-circuit bypass, the second proportional three-way valve 17 is open.

[0068] When the movable valve core of the multi-way valve is switched to the above-mentioned connection state, the multi-way valve thermal management system of the present application can realize three working conditions, namely:

[0069] Working condition 1: heating or dehumidifying the passenger compartment, equalizing the temperature of the power battery pack 7, and indirectly recovering the waste heat of the motor and electronic control to the passenger compartment;

[0070] Working condition 2: cooling or blowing air into the passenger compartment, equalizing the temperature of the power battery pack 7, and cooling the motor and electronic control;

[0071] Working condition 3: heating or dehumidifying the passenger compartment, equalizing the temperature of the power battery pack 7, and cooling the motor and electronic control.

[0072] refer to Figure 2 , specifically, in Case 1:

[0073] In the first circuit, second proportional three-way valve 17 is open, allowing coolant to bypass low-temperature radiator 3 via a short-circuit bypass. Heat exchanger 1 is in operation and connected in series with motor-controlled cooling device 2. Coolant flowing through heat exchanger 1 absorbs heat generated by motor-controlled cooling device 2 and transfers this heat to refrigerant flowing through heat exchanger 1. This heat is then transferred to condenser 4 within the passenger compartment via the refrigerant circulation loop, assisting in heating the passenger compartment and recovering waste heat from motor-controlled branch 10.

[0074] In the second loop, the battery branch 11 forms a self-circulation of coolant flowing through the battery branch through the multi-way valve, so that the power battery pack 7 itself can achieve heat balance, and the battery branch 11 self-circulates to complete the temperature equalization function.

[0075] In the third circuit, the coolant flows through the condenser 4, the water heating PTC 5 and the heater core 6 arranged in the passenger compartment heating circuit 12. The passenger compartment heating branch 12 forms a third circuit through a bypass pipe 16 controlled by a first proportional three-way valve 15 to operate as a separate circuit. The second circuit formed by the passenger compartment heating branch 12 is for heating or dehumidification.

[0076] The working process of the passenger compartment heating branch 12 is divided into two working states: (1) heat pump heating state, in the passenger compartment heating branch 12, the high-temperature and high-pressure refrigerant coming out of the compressor enters the condenser 4, in the condenser 4, on the refrigerant side, the refrigerant releases heat and becomes a medium-temperature and high-pressure liquid refrigerant flowing out, on the coolant side, the coolant absorbs heat, and the coolant with increased temperature flows through the water heating PTC5 (at this time, the water heating PTC5 only serves as a pipeline for circulation and does not perform temperature regulation), and then enters the heater core 6. Under the action of the blower, the heat in the coolant is released into the passenger compartment through the heater core 6, and the coolant flowing out of the heater core returns to the coolant circulation water pump 8 through the V1V2 channel of the proportional three-way valve and enters the next cycle;

[0077] (2) Water heating state: when the ambient temperature drops and the efficiency of the heat pump heating decreases, it is necessary to start the water heating PTC5 at the same time to heat the coolant in the passenger compartment heating branch 12 to the target temperature to ensure the heating requirements of the passenger compartment.

[0078] The third circuit also dehumidifies the vehicle's passenger compartment. This requires simultaneous cooling and heating. The cooling principle is as follows: refrigerant flowing through evaporator 9 absorbs heat from the passenger compartment, achieving a cooling effect. Condenser 4 heats the coolant in the passenger compartment, which is then dissipated to the passenger compartment by heater core 6. This simultaneous heating and cooling achieves dehumidification.

[0079] refer to Figure 3 , specifically, in Case 2:

[0080] In the first circuit, second proportional three-way valve 17 is closed, and the coolant flows through low-temperature radiator 3. Heat exchanger 1 is inactive, and motor electronic control cooling device 2 in motor electronic control branch 10 is in cooling operation. Motor electronic control branch 10 dissipates heat and cools through low-temperature radiator 3.

[0081] The working principle of the second circuit in working condition 2 is the same as that in working condition 1.

[0082] In the third circuit, there is no heating demand in the passenger compartment, and the coolant does not flow through the passenger compartment heating circuit 12. The evaporator 9 or the blower arranged in the passenger compartment is turned on, and the passenger compartment can be cooled or blown through the action of the refrigerant circulation circuit.

[0083] refer to Figure 4 , specifically, in Case 3:

[0084] The working principles of the first and second circuits in working condition 3 are the same as those in working condition 2. The working principle of the third circuit in working condition 3 is the same as that in working condition 1.

[0085] It should be noted that the refrigerant and coolant in this application are different media and serve different functions. Specifically, refrigerant generally refers to a refrigerant, which is a working substance that actively achieves cooling by changing its state; coolant generally refers to a mixture of water and ethylene glycol, which is a medium that passively exchanges heat.

[0086] In some embodiments, the multi-way valve includes a C1 interface, a C2 interface, a C3 interface, a C4 interface, a C5 interface, a C6 interface, a C7 interface, and a C8 interface;

[0087] Interface C1 and interface C2 are connected to the outlet and inlet of passenger compartment heating branch 12 respectively;

[0088] Interface C3 and interface C4 are connected to the inlet and outlet of battery branch 11 respectively;

[0089] Interface C5 and interface C6 correspond to the inlet and outlet of heat exchanger branch 13 respectively;

[0090] Interface C7 and interface C8 correspond to the inlet and outlet of the motor electronic control branch 10 respectively;

[0091] Among them, the C3 interface and the C4 interface are interconnected, the C5 interface and the C8 interface are interconnected, and the C6 interface and the C7 interface are interconnected;

[0092] The outlet and inlet of the passenger compartment heating branch 12 of the C1 interface and the C2 interface are completely closed.

[0093] In some embodiments, a coolant circulation water pump 8 is provided on the pipeline connecting the motor electronic control cooling device 2 and the low-temperature radiator 3 connected end to end and the multi-way valve, on the pipeline connecting the condenser 4, the water heating PTC 5 and the heater core 6 connected in sequence and the multi-way valve, and on the pipeline connecting the power battery pack 7 and the multi-way valve.

[0094] In some embodiments, a circuit through which refrigerant flows is provided between the heat exchanger 1 and the condenser 4;

[0095] The heat exchange between heat exchanger 1 and condenser 4 is thus achieved through heat transfer between the refrigerant and the coolant. When the passenger compartment heating circuit 12 is operating in the passenger compartment heating or dehumidification mode, heat is supplied by condenser 4. If the heat is insufficient, the water heating PTC 5 operates to heat the coolant in the passenger compartment heating branch to meet the warm air demand.

[0096] The refrigerant transfers the heat it carries to the coolant in the passenger compartment heating circuit 12 through the condenser 4 .

[0097] To dissipate heat through condenser 4, it must be absorbed elsewhere. Heat exchanger 1, acting as an outdoor heat exchanger, can also absorb some heat from the coolant. In the battery circuit, any excess heat in the battery pack is carried away by the coolant, which then absorbs it through heat exchanger 1, thereby lowering the coolant temperature in the circuit.

[0098] Furthermore, by setting up a refrigerant circuit between the heat exchanger 1 and the condenser 4, the waste heat recovery of the heat exchanger 1 can be achieved. When there is excess heat in the heat exchanger branch 13 where the heat exchanger 1 is located, the heat can be transferred to the condenser 4 located in the passenger compartment heating branch through the refrigerant circuit, which can further promote the transfer and circulation of heat.

[0099] like Figure 5 As shown, in some embodiments, the circuit through which the refrigerant flows is further provided with an evaporator 9 and an outdoor heat exchanger 14. Specifically, the evaporator 9 is located in the passenger compartment, and the outdoor heat exchanger 14 is located outside the passenger compartment. Figure 5 The refrigerant circuit shown enables heating or cooling of the passenger compartment.

[0100] The refrigerant circuit heats the passenger compartment by heating the condenser 4. The working principle is as follows:

[0101] 1. Waste heat recovery heats up the condenser 4. The heat exchanger 1 absorbs heat from the heat exchanger branch 13 into the refrigerant circuit, and can transfer the heat to the condenser 4 located in the passenger compartment heating branch 12.

[0102] 2. The outdoor environment heats up the condenser 4, and the outdoor heat exchanger 14 absorbs the temperature of the external environment and transfers the heat to the condenser 4 through the refrigerant circuit.

[0103] The refrigerant circuit cools the passenger compartment by cooling the evaporator 9. Its working principle is as follows: the refrigerant flowing through the outdoor heat exchanger 14 enters the evaporator 9. The evaporator 9 absorbs heat from the environment to allow the refrigerant to absorb heat and vaporize. The evaporator 9 is located in the passenger compartment, thereby achieving cooling of the passenger compartment.

[0104] Therefore, in operating conditions 1 and 3, the passenger compartment is heated by the coolant circuit. The refrigerant circulation loop also dehumidifies the passenger compartment, achieving dehumidification through the refrigerant circulation. The dehumidification principle is that the refrigerant flowing through evaporator 9 absorbs heat from the passenger compartment, thereby cooling condenser 4. Thus, the passenger compartment is heated by the heat pump and cooled by evaporator 9, achieving dehumidification.

[0105] In some embodiments, the heater core 6 and the evaporator 9 are installed together, and a blower is provided at the heater core 6;

[0106] The blower, the heater core 6 and the evaporator 9 are arranged in the air conditioning box;

[0107] The blower is used to accelerate the air passing through the heater core 6 and the evaporator to achieve heat exchange.

[0108] In some embodiments, a condensing fan is provided at the low-temperature radiator 3;

[0109] The condensing fan is used to assist in heat dissipation.

[0110] By providing a blower, the air circulation in the vehicle passenger compartment is enhanced, so that in working condition 2, the vehicle passenger compartment can also be blown, and in working conditions 1 and 3, the vehicle passenger compartment can also be dehumidified.

[0111] refer to Figure 6 In some embodiments where the multi-way valve is an eight-way valve, interfaces C1 through C8 are arranged in a nine-square grid to conserve space within the eight-way valve. Corresponding to the specific locations within the nine-square grid, interface C1 is located in the second row, first column; interface C2 is located in the third row, first column; interface C3 is located in the second row, second column; interface C4 is located in the third row, second column; interface C5 is located in the third row, third column; interface C6 is located in the first row, second column; interface C7 is located in the first row, third column; and interface C8 is located in the second row, third column. The interfaces in the first row, first column can be interconnected with other interfaces, thereby expanding the connection options of the eight-way valve.

[0112] refer to Figure 7 In some embodiments, the specific connection method of interfaces C1 to C8 is as follows: Figure 7 shown.

[0113] In some embodiments, the flow channel plate includes multiple flow channels for conveying coolant, and the multiple flow channels are arranged parallel to each other and one end is connected to the multi-way valve, and the other end is connected to the corresponding heat exchanger 1, motor electronic control cooling device 2, low-temperature radiator 3, condenser 4, water heating PTC 5, heater core 6 or power battery pack 7.

[0114] The present invention also provides an automobile, which adopts any one of the multi-way valve thermal management systems described above.

[0115] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A multi-way valve thermal management system, comprising a heat exchanger (1), a motor electronically controlled cooling device (2), a low-temperature radiator (3), a condenser (4), a water-heating PTC (5), a heater core (6), and a power battery pack (7); characterized in that: The heat exchanger (1), the motor electronically controlled cooling device (2), the low-temperature radiator (3), the condenser (4), the water-heating PTC (5), the heater core (6) and the power battery pack (7) are all connected to a multi-way valve via a flow channel plate to form a loop for circulating the coolant; The multi-way valve includes at least one movable valve core, through which the connection or closure between multiple pipelines is switched; The multi-way valve at least includes the movable valve core that switches the plurality of pipelines to the following states: The motor electronically controlled cooling device (2), the low-temperature radiator (3) and the multi-way valve are connected in series to form a motor electronically controlled branch circuit (10); The heat exchanger (1) and the multi-way valve are connected in series to form a heat exchanger branch (13); The power battery pack (7) and the multi-way valve are connected in series to form a battery branch (11); The condenser (4), the water heating PTC (5), the warm air core (6) and the multi-way valve are connected in series to form a passenger cabin heating branch (12); The motor electronic control branch (10) and the heat exchanger branch (13) are interconnected via the multi-way valve to form a first circuit; The battery branch (11) forms a second circuit through the multi-way valve; The connecting pipeline between the passenger compartment heating branch (12) and the multi-way valve is closed, and a third loop is formed through a bypass pipe (16) controlled by a first proportional three-way valve (15); The multi-way valve includes a C1 interface, a C2 interface, a C3 interface, a C4 interface, a C5 interface, a C6 interface, a C7 interface and a C8 interface; The C1 interface and the C2 interface are connected to the outlet and inlet of the passenger compartment heating branch (12) respectively; The C3 interface and the C4 interface are connected to the inlet and outlet of the battery branch (11) respectively; The C5 interface and the C6 interface correspond to the inlet and outlet of the heat exchanger branch (13) respectively; The C7 interface and the C8 interface correspond to the inlet and outlet of the motor electric control branch (10) respectively; The C3 interface and the C4 interface are interconnected, the C5 interface and the C8 interface are interconnected, and the C6 interface and the C7 interface are interconnected; The outlet and inlet of the passenger compartment heating branch (12) of the C1 interface and the C2 interface are completely closed. A coolant circulation water pump (8) is provided on the pipeline connecting the motor electronically controlled cooling device (2) and the low-temperature radiator (3) connected end to end to the multi-way valve, the pipeline connecting the condenser (4), the water heating PTC (5) and the heater core (6) connected in sequence to the multi-way valve, and the pipeline connecting the power battery pack (7) to the multi-way valve.

2. The multi-way valve thermal management system according to claim 1, characterized in that: The low-temperature radiator (3) is connected in parallel to a short-circuit bypass controlled by a second proportional three-way valve (17), and the flow rate of the corresponding coolant is distributed through the second proportional three-way valve (17).

3. The multi-way valve thermal management system according to claim 1, characterized in that: A circuit for flowing a refrigerant is provided between the heat exchanger (1) and the condenser (4); When the passenger compartment heating branch (12) is in the passenger compartment heating or dehumidification mode, heat comes from the condenser (4). If the heat is insufficient, the water heating PTC (5) operates to heat the coolant in the passenger compartment heating branch (12) to meet the demand for warm air. The refrigerant transfers the heat it carries to the coolant in the passenger compartment heating branch (12) through the condenser (4).

4. The multi-way valve thermal management system according to claim 3, characterized in that: The circuit through which the refrigerant flows is provided with an evaporator (9), the heater core (6) and the evaporator (9) are assembled together and provided with a blower; and / or, the circuit through which the refrigerant flows is provided with an outdoor heat exchanger (14); the blower, the heater core (6) and the evaporator (9) are arranged in an air-conditioning box; the blower is used to accelerate the air passing through the heater core (6) and the evaporator to achieve heat exchange.

5. The multi-way valve thermal management system according to claim 1, characterized in that: The low-temperature radiator (3) is provided with a condensing fan; The condensing fan is used to assist in heat dissipation; and / or, The heater core (6) is provided with a blower, the blower and the heater core (6); the blower is used to accelerate the air passing through the heater core (6) to achieve heat exchange.

6. The multi-way valve thermal management system according to claim 1, characterized in that: The flow channel plate includes a plurality of flow channels for conveying coolant, wherein the plurality of flow channels are arranged in parallel with each other and are connected to the multi-way valve at one end and are connected to the corresponding heat exchanger (1), the motor electronic control cooling device (2), the low-temperature radiator (3), the condenser (4), the water heating PTC (5), the heater core (6) or the power battery pack (7) at the other end.

7. An automobile, characterized in that: A multi-way valve thermal management system according to any one of claims 1 to 6 is employed.

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