Multi-way valve thermal management system and vehicle

Abstract

The present invention discloses a multi-way valve thermal management system and vehicle, including a heat exchanger, a low-temperature radiator, a condenser, a water-heating PTC, a heater core, and a power battery pack, all connected to a flow channel plate and a multi-way valve to form a branch for coolant flow. The multi-way valve includes at least one movable valve core, which switches the connection or closure between multiple pipelines. The multi-way valve includes at least one movable valve core that switches the multiple pipelines to the following states: a motor-controlled cooling device and a low-temperature radiator are connected in series to form a motor-controlled branch; a heat exchanger and a power battery pack are connected in series to form a battery branch; and a condenser, a water-heating PTC, and a heater core are connected in series to form a passenger compartment heating branch, which is isolated from the electronically controlled coolant branch and the battery branch. The application of the present invention improves the integration of the coolant branch and reduces the number of components in the thermal management system.

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 a vehicle. 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 energy management. 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, when new energy vehicles are driving or fast charging, the battery will generate a large amount of heat, posing a risk of thermal runaway.

[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 prevent battery thermal runaway 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 such as low integration of the coolant circuit, complex structure and easy thermal runaway of the battery, 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, and the motor electronically controlled branch alone forms a first 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 heat exchanger branch and the battery branch are connected to each other through the multi-way valve to form a second circuit;

[0019] The condenser, the water heating PTC, the warm air core and the multi-way valve are connected in series to form a passenger compartment heating branch, and the passenger compartment heating branch forms a third circuit alone, and the third circuit is isolated from the first circuit and the second circuit.

[0020] 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.

[0021] Furthermore, the present invention can cool the power battery pack by connecting the heat exchanger branch in series with the battery branch, thereby avoiding thermal runaway of the power battery pack due to excessive heat; and by isolating the third circuit from the first circuit and the second circuit, thereby reducing the thermal correlation between the passenger compartment and the power battery pack, and preventing the temperature of the passenger compartment from being transferred to the power battery pack during the heating process.

[0022] 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;

[0023] The C1 interface and the C2 interface are connected to the outlet and inlet of the passenger compartment heating branch circuit respectively;

[0024] The C3 interface and the C4 interface are connected to the inlet and outlet of the battery branch respectively;

[0025] The C5 interface and the C6 interface correspond to the inlet and outlet of the heat exchanger branch respectively;

[0026] The C7 interface and the C8 interface correspond to the inlet and outlet of the motor electronic control branch respectively;

[0027] The C1 interface and the C2 interface are interconnected, the C3 interface and the C6 interface are interconnected, the C4 interface and the C5 interface are interconnected, and the C7 interface and the C8 interface are interconnected.

[0028] Preferably, the motor electronic control branch, the battery branch and the passenger compartment heating branch are all provided with a coolant circulation water pump.

[0029] Preferably, a refrigerant circuit is provided between the heat exchanger and the condenser;

[0030] 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 will work to heat the coolant in the passenger compartment heating branch to meet the warm air demand;

[0031] The refrigerant transfers the heat it carries to the coolant in the passenger compartment heating branch through the condenser.

[0032] Preferably, the circuit through which the refrigerant flows is provided with an evaporator.

[0033] Preferably, the heater core is assembled with the evaporator and is provided with a blower;

[0034] The blower, the heater core and the evaporator are arranged in the air conditioning box;

[0035] The blower is used to accelerate the air passing through the heater core and the evaporator to achieve heat exchange.

[0036] Preferably, the low-temperature radiator is connected to a proportional three-way valve, so that the motor electronic control branch has a bypass effect, and the corresponding coolant flow is distributed through the proportional three-way valve.

[0037] Preferably, a condensing fan is provided at the low-temperature radiator;

[0038] The condensing fan is used to assist in heat dissipation.

[0039] Preferably, the flow channel plate includes multiple flow channels for conveying coolant, and the multiple flow channels are arranged parallel to each other, one end of each is connected to the multi-way valve, and the other end 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.

[0040] The present invention also provides a vehicle that adopts any of the above-mentioned multi-way valve thermal management systems.

[0041] 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

[0042] Figure 1 A structural diagram showing an embodiment of the present invention is shown.

[0043] Figure 2 A schematic diagram of the structure of a multi-way valve after switching in one embodiment of the present invention is shown.

[0044] Figure 3 A schematic diagram showing the structure of the independent working state of the passenger compartment heating branch after the multi-way valve is switched in one embodiment of the present invention.

[0045] Figure 4 A schematic diagram of a refrigerant connection circuit in one embodiment of the present invention is shown.

[0046] Figure 5 A schematic diagram of the arrangement of interfaces of a multi-way valve in one embodiment of the present invention is shown.

[0047] Figure 6 A schematic diagram showing the interface connection mode of a multi-way valve in one embodiment of the present invention is shown.

[0048] Among them, 1. Heat exchanger; 2. Motor electronic control cooling device; 3. Low-temperature radiator; 4. Condenser; 5. Water heating PTC; 6. Warm air 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. DETAILED DESCRIPTION

[0049] Example

[0050] like Figures 1 to 3 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.

[0051] 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;

[0052] 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;

[0053] The multi-way valve includes at least a movable valve core that switches multiple pipelines to the following states:

[0054] The motor electronic control cooling device 2 and the low-temperature radiator 3 are connected in series to form a motor electronic control branch 10, and the motor electronic control branch 10 alone forms a first loop;

[0055] The heat exchanger 1 is connected in series with the multi-way valve to form a heat exchanger branch 13;

[0056] The power battery pack 7 is connected in series with the multi-way valve to form a battery branch 11;

[0057] The heat exchanger branch 13 and the battery branch 11 are connected to each other through a multi-way valve to form a second circuit;

[0058] The condenser 4, water heating PTC 5, heater core 6 and multi-way valve are connected in series to form a passenger compartment heating branch 12, and the passenger compartment branch 13 forms a third circuit alone. The third circuit is isolated from the first circuit and the second circuit, that is, the passenger compartment branch 12 is isolated from the motor electronic control branch 10, the battery branch 11 and the heat exchanger branch 13.

[0059] The application of the present invention improves the integration of the coolant circuit, reduces the number of components in the thermal management system, and comprehensively manages the decentralized thermal management system to reduce energy waste. Furthermore, by connecting the heat exchanger branch 13 with the battery branch 11, the present invention can cool the power battery pack 7, thereby preventing the power battery pack 7 from thermal runaway due to excessive heat. By isolating the passenger compartment heating branch 12 from the motor and electronic control branch 10, the battery branch 11, and the heat exchanger branch 13, the thermal correlation between the passenger compartment and the power battery pack 7 is reduced, preventing the temperature of the passenger compartment from being transferred to the power battery pack 7 during the heating process.

[0060] It should be noted that the isolation of the passenger compartment heating branch 12 from the motor and electronic control branch 10 , the battery branch 11 and the heat exchanger branch 13 means that the passenger compartment heating branch 12 is not connected to the motor and electronic control branch 10 , the battery branch 11 and the heat exchanger branch 13 .

[0061] In actual applications, the heat exchanger 1 is usually a plate heat exchanger, whose English name is Chiller. When the battery needs to be cooled, the refrigerant inside the Chiller absorbs heat and evaporates, and the coolant absorbs heat and the temperature drops. In the heat pump system, the refrigerant inside the Chiller absorbs heat and evaporates, and the coolant absorbs heat and the temperature drops. Since it is connected in series in the battery branch or the motor electronic control branch 10 at this time, the heat exchanger 1 has the function of recovering waste heat for the battery or the motor electronic control.

[0062] 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.

[0063] Heat exchanger 1 has four ports and a structure similar to that of condenser 4;

[0064] The low temperature radiator 3 mainly plays the role of heat dissipation, and its English abbreviation is LTR;

[0065] Condenser 4 is usually an indirect condenser in practical applications. Its English name is I-COND. It has four ports. The connection method is as follows: Figure 4 As shown, two of the ports are used to allow coolant to pass through and are connected to a branch flowing through the coolant; the other two ports are used to allow refrigerant to pass through and are connected to a circuit flowing through the refrigerant.

[0066] When the passenger compartment heating branch 12 is in a heating state, the coolant flowing through the I-COND absorbs heat from the refrigerant to increase its temperature.

[0067] The water heating PTC5 plays the role of heating the coolant;

[0068] The coolant exchanges heat with the air through the heater core 6, and the blower accelerates the air flow on the surface of the heater core 6 to achieve the purpose of continuous heat exchange. The heater core 6 also has the function of heat dissipation.

[0069] like Figures 1 to 3 As shown, the multi-way valve of one embodiment 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.

[0070] Among them, the C1 interface and the C2 interface are respectively connected to the exit and entrance of the passenger compartment branch 12, the C3 interface and the C4 interface are respectively connected to the entrance and exit of the battery branch 11, the C5 interface and the C6 interface correspond to the entrance and exit of the heat exchanger branch 13, and the C7 interface and the C8 interface correspond to the entrance and exit of the motor electronic control branch 10.

[0071] Specifically, the eight interfaces are connected to each other as follows: the C1 interface and the C2 interface are connected, the C3 interface and the C6 interface are connected, the C4 interface and the C5 interface are connected, and the C7 interface and the C8 interface are connected, so that the battery branch 11 and the heat exchanger branch 13 are connected in series through a multi-way valve, and the passenger compartment heating branch 12 is isolated from the motor electronic control branch 10, the battery branch 11 and the heat exchanger branch 13.

[0072] Among them, through the connection between the C1 interface and the C2 interface, the multi-way valve can be connected to more circuits in the existing environment, thereby expanding the application scenarios of the multi-way valve and enabling the thermal management system of this application to adapt to different system requirements.

[0073] In other embodiments, the number of interfaces of the multi-way valve may also be 9, 10, 11, etc., as long as the above-mentioned connection method can be realized.

[0074] Under the above connection state, two operating conditions can be achieved, namely: operating condition 1, cooling of the motor and electronic control and forced cooling of the battery pack; operating condition 2, heating of the passenger compartment, cooling of the motor and electronic control and waste heat recovery of the battery pack.

[0075] See Figure 2 , specifically, in Case 1:

[0076] In the first loop, the motor electronic control cooling device 2 and the low-temperature radiator 3 are connected in series to form a motor electronic control branch 10. The motor electronic control branch 10 alone forms the first loop to achieve cooling of the motor electronic control.

[0077] The cooling process of the motor electronic control is as follows: the coolant with a lower temperature coming out of the coolant circulation water pump 8 of the motor electronic control branch 10 passes through the motor electronic control cooling device 2, absorbs and takes away the excess heat inside it, and then enters the low-temperature radiator 3, where the coolant dissipates heat. The coolant flowing out of the low-temperature radiator 3 passes through the multi-way valve and returns to the coolant circulation water pump 8 of the motor electronic control branch 10 to enter the next cycle.

[0078] In the second loop, the heat exchanger 1 and the power battery pack 7 are connected in series to meet the strong cooling required by the vehicle battery pack. The refrigerant system is in working state, and the heat exchanger 1 only plays a cooling role.

[0079] The forced cooling process of the battery pack is as follows: the coolant with a lower temperature coming out of the battery water pump enters the battery pack, absorbs the heat in the battery pack and takes it out, flows through the multi-way valve into the heat exchanger 1 to exchange heat with the low-temperature refrigerant, the refrigerant absorbs heat and evaporates, the coolant releases heat and the temperature is reduced, and the coolant with reduced temperature returns to the battery water pump through the multi-way valve and enters the next cycle.

[0080] In the third circuit, the passenger compartment does not need to be heated, so no coolant circulates in the third circuit.

[0081] See Figure 3 , further, in Case 2:

[0082] The working principles of the first and second circuits in working condition 2 are the same as those in working condition 1 and will not be described in detail here.

[0083] In the third circuit, the working process of the passenger compartment heating branch 12 is divided into two working states:

[0084] 1. In the heat pump heating state, in the passenger compartment heating branch 12, the high-temperature, high-pressure refrigerant from the compressor enters the condenser 4. In the condenser 4, on the refrigerant side, the refrigerant releases heat and flows out as medium-temperature, high-pressure liquid refrigerant. On the coolant side, the coolant absorbs heat. The heated coolant flows through the water heating PTC 5 (at this time, the water heating PTC 5 only serves as a pipeline for circulation and does not perform temperature regulation) and 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. The coolant flowing out of the heater core returns to the coolant circulation pump 8 through the V1V2 channels of the proportional three-way valve and enters the next cycle.

[0085] 2. In the 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 third circuit to the target temperature to ensure the heating requirements of the passenger compartment.

[0086] In certain embodiments, the motor electronic control branch 10 , the battery branch 11 , and the passenger compartment heating branch 12 are all provided with a coolant circulation water pump 8 .

[0087] Specifically, a coolant circulation water pump 8 is arranged on the water inlet side of the power battery pack 7, and its function is to provide power for the coolant circulation in the interconnected battery branch 11 and the heat exchanger branch 13; a coolant circulation water pump 8 is arranged on the water inlet side of the motor electronic control cooling device 2, and its function is to provide power for the coolant circulation in the motor electronic control branch 10; a coolant circulation water pump 8 is arranged on the water inlet side of the condenser 4, and its function is to provide power for the coolant in the passenger compartment heating branch 12.

[0088] Please refer to Figure 4 , Figure 4 1 shows a refrigerant circulation circuit in some embodiments of the present application. In some embodiments, a refrigerant circuit is provided between the heat exchanger 1 and the condenser 4;

[0089] When the passenger compartment heating branch 12 is in the passenger compartment heating working condition, i.e. working condition 2, the heat comes from the condenser 4. If the heat is insufficient, the water heating PTC 5 works to heat the coolant in the third circuit to meet the warm air demand;

[0090] The refrigerant transfers the heat it carries to the coolant in the third circuit via condenser 4. To dissipate heat through condenser 4, heat must be absorbed elsewhere, and heat exchanger 1 can absorb a certain amount of heat from the refrigerant. In battery branch 11, any excess heat in the power battery pack 7 is removed by the coolant and then absorbed by the refrigerant through heat exchanger 1, thereby lowering the coolant temperature in the circuit.

[0091] 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 12 through the refrigerant circuit, which can further promote the transfer and circulation of heat.

[0092] like Figure 4 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 4 The refrigerant circuit shown enables heating or cooling of the passenger compartment.

[0093] The refrigerant circuit heats the passenger compartment by heating the condenser 4. The working principle is as follows:

[0094] 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 transfers the heat to the condenser 4 in the passenger compartment heating branch 12.

[0095] 2. The outdoor environment heats up the condenser 4. The outdoor heat exchanger 14 absorbs the temperature of the external environment and transfers the heat to the condenser 4 through the refrigerant circuit.

[0096] 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.

[0097] Therefore, in operating condition 1, the refrigerant circulation loop can also cool the vehicle's passenger compartment. The cooling principle is that the refrigerant flowing through evaporator 9 absorbs heat from the passenger compartment, achieving a cooling effect. In operating condition 2, the passenger compartment is heated by the coolant circuit. By activating the cooling function of evaporator 9, the passenger compartment can also be dehumidified.

[0098] In practical applications, the cooling of the vehicle passenger compartment is completed by the evaporator 9. Figures 1 to 3 The evaporator 9 is not shown in the figure and has nothing to do with the circuit through which the coolant flows. Figure 2 The middle passenger compartment heating branch 12 is in an inoperative state.

[0099] In some embodiments, the low-temperature radiator 3 is connected to a proportional three-way valve, so that the first circuit has a bypass function, and the corresponding coolant flow is distributed through the proportional three-way valve, so that whether to realize the waste heat recovery of the motor can be set.

[0100] In some embodiments, the heater core 6 is mounted together with the evaporator 9 and is provided with a blower;

[0101] The blower, the heater core 6 and the evaporator 9 are arranged in the air conditioning box;

[0102] The blower is used to accelerate the air passing through the heater core 6 and the evaporator to achieve heat exchange.

[0103] In some embodiments, a condensing fan is provided at the low-temperature radiator 3;

[0104] The condensing fan is used to assist in heat dissipation.

[0105] By providing a blower, the air circulation in the vehicle passenger compartment is enhanced, so that in working condition 1, the vehicle passenger compartment can also be blown, and in working condition 2, the vehicle passenger compartment can also be dehumidified.

[0106] refer to Figure 5 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.

[0107] refer to Figure 6 In some embodiments, the specific connection method of interfaces C1 to C8 is as follows: Figure 6 shown.

[0108] 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, one end of each 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.

[0109] The present invention also provides a vehicle that adopts the multi-way valve thermal management system.

[0110] 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 branch 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 heat exchanger branch (13) and the battery branch (11) are connected to each other through the multi-way valve; 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), which is isolated from the motor electronic control branch (10), the battery branch (11) and the heat exchanger branch (13); 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 C1 interface and the C2 interface are interconnected, the C3 interface and the C6 interface are interconnected, the C4 interface and the C5 interface are interconnected, and the C7 interface and the C8 interface are interconnected; The motor electronic control branch (10), the battery branch (11), and the passenger compartment heating branch (12) are all provided with a coolant circulation water pump (8); A coolant circulation water pump (8) is provided between the power battery pack (7) and the C3 interface connected to the multi-way valve; A coolant circulation water pump (8) is provided between the motor electronically controlled cooling device (2) and the C7 interface connected to the multi-way valve.

2. 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) works 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).

3. The multi-way valve thermal management system according to claim 2, characterized in that: The circuit through which the refrigerant flows is provided with an evaporator (9); and / or the circuit through which the refrigerant flows is provided with an outdoor heat exchanger (14).

4. The multi-way valve thermal management system according to claim 3, characterized in that: The heater core (6) and the evaporator (9) are assembled together and are provided with a blower; The blower, the heater core (6) and the evaporator (9) are arranged in the passenger compartment; 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 connected to a proportional three-way valve, so that the motor electronic control branch (10) has a bypass function, and the corresponding coolant flow is distributed through the proportional three-way valve.

6. 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.

7. 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.

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

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