Multi-port valve thermal management system and vehicle

Abstract

This invention discloses a multi-way valve thermal management system and an automobile, including a heat exchanger, a low-temperature radiator, a condenser, a water-cooled PTC heater core, a heater core, and a power battery pack, all connected to a flow channel plate and a multi-way valve to form a coolant flow circuit. The multi-way valve includes at least one movable valve core, which switches the connection or closure of multiple pipelines. The multi-way valve includes at least one movable valve core that switches the multiple pipelines to the following states: the heat exchanger, the motor-controlled cooling device connected end-to-end, and the low-temperature radiator are connected by the multi-way valve to form a first circuit; the condenser, the water-cooled PTC heater core, and the power battery pack are connected by the multi-way valve to form a second circuit; wherein the inlet and outlet of the sequentially connected condenser, water-cooled PTC heater core, and heater core are provided with two short-circuit lines at the end connected to the multi-way valve; and at least one short-circuit line can be closed by the valve. The application of this invention improves the integration of the coolant circuit and reduces the number of components in the thermal management system.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology for new energy vehicles, and particularly to a multi-way valve thermal management system and automobiles. Background Technology

[0002] With the surge in enthusiasm for purchasing new energy vehicles, people are paying increasing attention to their range and safety.

[0003] Traditional gasoline vehicles have limited thermal management functions, fewer system components, and relatively simple system functions.

[0004] New energy vehicles are powered by electricity, and the heating and cooling needs of the passenger compartment, the temperature balance of the battery pack, and the cooling of the motor and electronic control all require electrical energy. Compared to traditional fuel vehicles, energy management involves more aspects and the system is more complex. Therefore, thermal management is becoming increasingly important in improving energy efficiency and ensuring the vehicle's range and battery pack safety.

[0005] The thermal management system includes a refrigerant circuit and a coolant circuit, with the coolant circuit playing a crucial role in the new energy thermal management system.

[0006] Existing thermal management systems for new energy vehicles are still mainly decentralized, with heat exchange between functional components such as the passenger compartment, battery, and motor relying primarily on coolant, and each operating in a separate circuit. To achieve connectivity between these circuits, multiple three-way and four-way valves are used within each circuit, with different system functions achieved through combinations of these valves.

[0007] Because the components of the thermal management system are distributed across different locations throughout the vehicle, connected by pipelines and then fixed to the vehicle, the system integration is low. For vehicle manufacturers, this results in a wide variety of materials, a large space requirement, and complex system control, leading to insufficient energy utilization. Ultimately, this results in a long development cycle, high cost, complex vehicle assembly, and inconvenient maintenance for the thermal management system.

[0008] Furthermore, in low-temperature environments, the batteries of new energy vehicles are difficult to charge and discharge, and there is a risk of damage. Existing technologies usually heat the batteries by connecting them to external heating packs, which takes up more space in the vehicle and requires more energy.

[0009] Therefore, in the vehicle thermal management system, how to improve the integration of the coolant circuit, reduce the number of parts, manage the dispersed thermal management system in a unified manner, and reasonably heat the battery have become technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0010] In view of the problems of low integration of coolant circuit, complex structure and inconvenience of battery heating in the existing technology, this application provides a multi-way valve thermal management system and automobile.

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

[0012] The heat exchanger, the motor electronic control 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 circuit for the flow of coolant.

[0013] The multi-way valve includes at least one movable valve core, which is used to switch the connection or closure between multiple pipelines;

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

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

[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;

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

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

[0020] The crew cabin heating branch and the battery branch are interconnected through the multi-way valve to form a second circuit.

[0021] The crew cabin heating branch includes two parallel short-circuit lines on the side connected to the multi-way valve.

[0022] Of the two short-circuit lines, at least one of the short-circuit lines can be closed by the first proportional three-way valve.

[0023] The application of this invention reduces energy waste by improving the integration of the coolant circuit, reducing the number of components in the thermal management system, shrinking the space occupied by the thermal management system, and unifying the management of the dispersed thermal management system.

[0024] Furthermore, the present invention forms a first circuit by connecting the heat exchanger circuit and the motor control circuit in series, which can recover waste heat from the motor control circuit; and forms a second circuit by connecting the passenger compartment heating circuit and the battery circuit in series, which can heat the battery.

[0025] Preferably, the multi-way valve includes interfaces C1, C2, C3, C4, C5, C6, C7, and C8. Interfaces C1 and C2 are respectively connected to the outlet and inlet of the passenger compartment heating branch, interfaces C3 and C4 are respectively connected to the inlet and outlet of the battery branch, interfaces C5 and C6 correspond to the inlet and outlet of the heat exchanger branch, and interfaces C7 and C8 correspond to the inlet and outlet of the motor control branch. Specifically, interfaces C1 and C3 are interconnected, interfaces C2 and C4 are interconnected, interfaces C6 and C7 are interconnected, and interfaces C5 and C8 are interconnected.

[0026] Preferably, the C1 interface and the condenser are connected at the location where the condenser connects to the two short-circuit pipelines by setting multiple tees;

[0027] The C2 interface and the heater core are connected by multiple tees at the location where the heater core connects to the two short-circuit pipelines.

[0028] Preferably, a coolant circulating water pump is provided on the pipelines connecting the motor control cooling device and the low-temperature radiator to the multi-way valve, the pipelines connecting the condenser, the water heating PTC and the heater core to the multi-way valve, and the pipeline connecting the power battery pack to the multi-way valve.

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

[0030] When the passenger compartment heating branch is in 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 demand for warm air.

[0031] The refrigerant carries heat and transfers it through the condenser to the coolant in the crew compartment heating circuit.

[0032] Preferably, the circuit through which the refrigerant flows is provided with an evaporator, the warm air core is mounted together with the evaporator and is provided with a blower; and / or, the circuit through which the refrigerant flows is provided with an outdoor heat exchanger;

[0033] The blower, the heater core, and the evaporator are located in the passenger compartment; the blower is used to accelerate the air passing through the heater core and the evaporator to achieve heat exchange.

[0034] Preferably, the low-temperature radiator is connected in parallel with a second proportional three-way valve, which enables the motor control branch to bypass the circuit and distribute the corresponding coolant flow rate through the second proportional three-way valve.

[0035] Preferably, a condenser fan is provided at the low-temperature radiator;

[0036] The condenser fan is used for auxiliary heat dissipation; and / or,

[0037] A blower is provided at the heating core, and the blower and the heating core are connected; the blower is used to accelerate the air passing through the heating core to achieve heat exchange.

[0038] Preferably, the flow channel plate includes multiple flow channels for conveying coolant. The multiple flow channels are arranged in 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.

[0039] The present invention also provides an automobile that employs the multi-port valve thermal management system described in any one of the above claims.

[0040] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0041] Figure 1 A structural view of an embodiment of the present invention is shown.

[0042] Figure 2 This diagram illustrates a state in which the second proportional three-way valve is fully open and the coolant does not pass through the low-temperature radiator, according to an embodiment of the present invention.

[0043] Figure 3 This diagram illustrates a state in which the second proportional three-way valve is completely closed and all coolant flows through the low-temperature radiator, according to one embodiment of the present invention.

[0044] Figure 4 This diagram illustrates a state in which the second proportional three-way valve is fully closed and one of the two short-circuit pipelines is closed, according to an embodiment of the present invention.

[0045] Figure 5 A schematic diagram of the refrigerant connection circuit is shown in one embodiment of the present invention.

[0046] Figure 6The diagram shows the interface arrangement of an eight-way valve in one embodiment of the present invention.

[0047] Figure 7 The diagram shows the interface connection method of the eight-way valve in one embodiment of the present invention.

[0048] Among them, 1. Heat exchanger; 2. Motor and electronic control cooling device; 3. Low temperature radiator; 4. Condenser; 5. Water heating PTC; 6. Heater core; 7. Power battery pack; 8. Coolant circulating water pump; 9. Evaporator; 10. Motor and electronic control branch; 11. Battery branch; 12. Passenger compartment heating branch; 13. Heat exchanger branch; 14. Outdoor heat exchanger; 15. Short circuit pipeline; 16. First proportional three-way valve; 17. Second proportional three-way valve. Detailed Implementation

[0049] Example

[0050] like Figures 1 to 4 As shown, the multi-port valve thermal management system includes a heat exchanger 1, a motor and electronic control cooling device 2, a low-temperature radiator 3, a condenser 4, a water-cooled PTC 5, a heater core 6, and a power battery pack 7.

[0051] Among them, heat exchanger 1, motor and electronic control cooling device 2, low temperature radiator 3, condenser 4, water heating PTC 5, heating core 6 and power battery pack 7 are all connected to multi-way valve through flow channel plate to form a circuit for the circulation of coolant.

[0052] A multi-way valve includes at least one movable valve core, which switches the connection or closure between multiple pipelines.

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

[0054] The motor control cooling device 2, the low-temperature radiator 3, and the multi-way valve are connected in series to form the motor control branch 10;

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

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

[0057] The condenser 4, water heating PTC 5, and heater core 6 are connected in series with the multi-way valve to form the crew cabin heating branch circuit 12;

[0058] The heat exchanger branch 13 and the motor control branch 10 are interconnected through a multi-way valve to form the first loop;

[0059] The crew cabin heating branch 12 and the battery branch 11 are interconnected through a multi-way valve to form a second circuit;

[0060] Among them, the crew cabin heating branch includes two parallel short-circuit lines 15 on the side connected to the multi-way valve;

[0061] Of the two short-circuit lines 15, at least one short-circuit line 15 can be closed by the first proportional three-way valve 16.

[0062] The application of this invention reduces energy waste by improving the integration of the coolant circuit, reducing the number of components in the thermal management system, and managing the dispersed thermal management system in a unified manner.

[0063] Furthermore, the present invention forms a first circuit by connecting the heat exchanger branch 13 and the motor control branch 10 in series, which can recover waste heat from the motor control; and forms a second circuit by connecting the passenger compartment heating branch 12 and the battery branch 11 in series, which can heat the battery.

[0064] like Figures 1 to 4 As shown, in some embodiments, a multi-way valve includes ports C1, C2, C3, C4, C5, C6, C7, and C8.

[0065] Among them, C1 and C2 are connected to the outlet and inlet of the crew compartment branch 12, respectively; C3 and C4 are connected to the inlet and outlet of the battery branch 11, respectively; C5 and C6 are connected to the inlet and outlet of the heat exchanger branch 13, respectively; and C7 and C8 are connected to the inlet and outlet of the motor and electronic control branch 10, respectively.

[0066] Specifically, the eight interfaces are connected as follows: C1 and C3 are connected to each other, C2 and C4 are connected to each other, C6 and C7 are connected to each other, and C5 and C8 are connected to each other, thereby realizing the series connection of heat exchanger branch 13 and motor control branch 10, as well as the series connection of crew cabin heating branch 12 and battery branch 11.

[0067] In other embodiments, the number of ports of the multi-way valve may also be 9, 10, 11, etc., as long as the above connection method can be achieved.

[0068] In some embodiments, the connection between the C1 interface and the condenser 4 is achieved by setting multiple tees at the location where the condenser 4 is connected to the two short-circuit lines 15;

[0069] The connection between the C2 interface and the heater core 6 is achieved by setting multiple tees at the location where the heater core 6 connects to the two short-circuit pipes 15.

[0070] In some embodiments, a second proportional three-way valve 17 is connected in parallel with the cryogenic radiator 3, enabling the motor control branch 10 to bypass the flow of coolant. The second proportional three-way valve 17 distributes the corresponding flow of coolant. When the coolant flows only through the cryogenic radiator 3, the second proportional three-way valve 17 is closed; when the coolant flows back to the multi-way valve through the bypass pipe instead of through the cryogenic radiator 3, the second proportional three-way valve 17 is open.

[0071] In the above connection state, the multi-way valve thermal management system of this application can realize three operating conditions: operating condition 1, waste heat recovery of motor and electronic control, and joint heating of passenger compartment and power battery pack; operating condition 2, cooling of motor and electronic control, and joint heating of passenger compartment and power battery pack; operating condition 3, cooling of motor and electronic control, air blowing of passenger compartment and heating of battery pack.

[0072] Please refer to Figure 2 Specifically, in operating condition 1:

[0073] In operating condition 1, the first proportional three-way valve 16 is in the open state, meaning that both short-circuit pipelines 15 are in the open state; the second proportional three-way valve 17 is in the open state, meaning that the coolant does not pass through the low-temperature radiator 3 but passes through the bypass circuit.

[0074] In the first loop, the heat exchanger branch 13 is interconnected with the motor control branch 10. That is, the heat exchanger 1 and the motor control cooling device 2 are connected in series via a multi-way valve. The coolant passes through the heat exchanger 1 without passing through the low-temperature radiator 3. Thus, when the passenger compartment needs heating, the heat exchanger 1 can absorb heat from the coolant. Since a refrigerant circulation loop is provided between the heat exchanger 1 and the condenser 4 located in the passenger compartment, the excess heat in the motor control branch 10 can be carried into the passenger compartment through the heat exchanger 1 and the condenser 4 by the refrigerant, realizing the recovery of waste heat from the motor control.

[0075] In the second circuit, the passenger compartment heating branch is interconnected with the battery branch. Specifically, the condenser 4, water-cooled PTC 5, heater core 6, and power battery pack 7 are connected in series via a multi-way valve. The coolant flows through two short-circuit lines 13. The specific process is as follows:

[0076] For the short-circuit line 15 with the first proportional three-way valve 16, part of the coolant flowing out of the heater core 6 returns to the condenser 4 through the first proportional three-way valve 16, and the other part enters the power battery pack 7 through the first proportional three-way valve 16.

[0077] For another short-circuit line 15 without the first proportional three-way valve 16, the coolant flows from point b to point a in the short-circuit line 13, then from point a through the multi-way valve into the power battery pack 7, and after flowing through the power battery pack 7, it returns to point b through the multi-way valve to enter the next cycle.

[0078] The coolant flowing in the second loop 12, as described above, can achieve joint heating of the passenger compartment and the power battery pack 7.

[0079] Please refer to Figure 3 Specifically, in operating condition 2:

[0080] In operating condition 2, the first proportional three-way valve 16 is in the open state, meaning that both short-circuit pipelines 15 are in the open state; the second proportional three-way valve 17 is in the closed state, meaning that the coolant only passes through the low-temperature radiator 3.

[0081] In the first loop, the heat exchanger branch 13 is connected to the motor control branch 10, that is, the heat exchanger 1, the motor control cooling device 2, and the low-temperature radiator 3 are connected in series through a multi-way valve. At this time, the heat exchanger 1 in the first loop does not perform heat exchange, but only serves as a connection channel, so that the low-temperature radiator 3 can cool the motor control cooling device 2 to achieve cooling of the motor control.

[0082] The working principle of the second circuit in operating condition 2 is the same as that in operating condition 1, and will not be repeated here.

[0083] Please refer to Figure 4 Specifically, in operating condition 3:

[0084] In operating condition 3, the first proportional three-way valve 16 is in the closed state, meaning that only one of the two short-circuit lines 15 is in the open state; the second proportional three-way valve 17 is in the closed state, meaning that the coolant only passes through the low-temperature radiator.

[0085] The working principle of the first circuit in operating condition 3 is the same as that in operating condition 2, and will not be repeated here.

[0086] In the second circuit, a short-circuit line 15 is closed by the first proportional three-way valve 16, and the coolant is cooled by the low-temperature radiator 3, so the heat exchanger 1 does not work.

[0087] In this state, the passenger compartment does not require heating. Heat is drawn from the condenser 4 and carried by the coolant to the heater core 6. No air flows through the heater core 6, so no heat exchange occurs. The coolant exiting the heater core 6 enters the power battery pack 7. The system's heating is solely for heating the power battery pack 7. Airflow in the passenger compartment is achieved by activating a blower located at the heater core 6.

[0088] In some embodiments, coolant circulating water pumps 8 are provided in the motor control branch 10, the battery branch 11, and the crew cabin heating branch 12.

[0089] Specifically, a coolant circulating water pump 8 is installed on the inlet side of the power battery pack 7, and its function is to provide power for the circulation of coolant in the interconnected battery circuit 11 and heat exchanger circuit 13; a coolant circulating water pump 8 is installed on the inlet side of the motor control cooling device 2, and its function is to provide power for the circulation of coolant in the motor control circuit 10; a coolant circulating water pump is installed on the inlet side of the condenser 4, and its function is to provide power for the coolant in the passenger compartment heating circuit 12.

[0090] In some embodiments, a refrigerant flow loop is provided between the heat exchanger 1 and the condenser 4;

[0091] Thus, the heat exchange between heat exchanger 1 and condenser 4 is achieved through heat transfer via refrigerant and coolant. When the crew cabin heating branch 12 is in crew cabin heating or dehumidification mode, the heat comes from condenser 4. If the heat is insufficient, the water-cooled PTC 5 operates to heat the coolant in the crew cabin heating branch 12 to meet the demand for warm air.

[0092] The refrigerant carries heat and transfers it to the coolant in the crew compartment heating branch 12 via the condenser 4.

[0093] When heat needs to be dissipated through condenser 4, it needs to absorb heat from other sources. Heat exchanger 1, as an outdoor heat exchanger, can also absorb some heat from the coolant. In the battery circuit, if there is excess heat in the battery pack, it is carried away by the coolant and absorbed by the refrigerant through heat exchanger 1, thereby lowering the coolant temperature in the circuit.

[0094] Furthermore, by setting up a refrigerant circuit between heat exchanger 1 and condenser 4, waste heat recovery of heat exchanger 1 can be achieved. When there is excess heat in heat exchanger branch 13 where heat exchanger 1 is located, the heat can be transferred to condenser 4 located in the crew cabin heating branch through the refrigerant circuit, which can further promote heat transfer and circulation.

[0095] 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.

[0096] Specifically, the evaporator 9 is located inside the crew compartment, and the outdoor heat exchanger 14 is located outside the crew compartment. Figure 5 The refrigerant circuit shown can achieve heating or cooling of the crew cabin.

[0097] The refrigerant circuit heats the crew compartment by raising the temperature of condenser 4. The working principle is as follows:

[0098] 1. Waste heat recovery raises the temperature of condenser 4. Heat exchanger 1 absorbs heat from heat exchanger branch 13 into refrigerant circuit and can transfer heat to condenser 4 located in crew cabin heating branch 12.

[0099] 2. The outdoor environment causes the condenser 4 to heat up. The outdoor heat exchanger 14 absorbs the temperature of the outside environment and transfers the heat to the condenser 4 through the refrigerant circuit.

[0100] The refrigerant circuit cools the passenger compartment by cooling the evaporator 9. The 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 and causes the refrigerant to vaporize. The evaporator 9 is located inside the passenger compartment, thereby achieving the cooling of the passenger compartment.

[0101] Therefore, in operating conditions 1 and 2, the passenger compartment is in a heating state under the action of the coolant circuit. Through the refrigerant circulation circuit, dehumidification of the passenger compartment is also achieved. The dehumidification principle is as follows: the refrigerant flowing through evaporator 9 absorbs heat from the passenger compartment, thus cooling the condenser 4. Therefore, the passenger compartment utilizes a heat pump for heating and evaporator 9 for cooling, achieving the purpose of dehumidification.

[0102] It should be noted that the refrigerant and coolant in this application are different media and play different roles. Specifically, refrigerant usually refers to a cooling medium, which is a working substance that achieves an active cooling effect by changing its own state; coolant usually refers to a mixture of water and ethylene glycol, etc., which is a medium for passive heat exchange.

[0103] In some embodiments, the warm air core 6 is assembled together with the evaporator 9, and a blower is provided at the warm air core 6;

[0104] The blower, the heater core 6 and the evaporator 9 are located in the crew compartment;

[0105] The blower is used to accelerate the air passing through the warm air core 6 and the evaporator to achieve heat exchange.

[0106] In some embodiments, a condenser fan is provided at the low-temperature radiator 3;

[0107] The condenser fan is used to assist in heat dissipation.

[0108] By installing a blower, air circulation in the passenger compartment of the vehicle is enhanced, thus enabling airflow into the passenger compartment in operating condition 1 and dehumidification in the passenger compartment in operating condition 2.

[0109] refer to Figure 6In some embodiments where the multi-way valve is an eight-way valve, the C1 to C8 ports are arranged in a 3x3 grid to save space required for the eight-way valve. Corresponding to the specific positions in the 3x3 grid, the C1 port is located in the second row, first column; the C2 port is located in the third row, first column; the C3 port is located in the second row, second column; the C4 port is located in the third row, second column; the C5 port is located in the third row, third column; the C6 port is located in the first row, second column; the C7 port is located in the first row, third column; and the C8 port is located in the second row, third column. The ports in the first row, first column can communicate with other ports, thereby expanding the connection options for the eight-way valve.

[0110] refer to Figure 7 In some embodiments, the specific connection methods of interfaces C1 to C8 are as follows: Figure 7 As shown.

[0111] In some embodiments, the flow plate includes multiple flow channels for conveying coolant. The multiple flow channels are arranged in parallel to each other and one end of each is connected to a multi-way valve, and the other end of each is connected to a corresponding heat exchanger 1, motor control cooling device 2, low temperature radiator 3, condenser 4, water heating PTC 5, heater core 6 or power battery pack 7.

[0112] The present invention also provides an automobile that employs a multi-port valve thermal management system according to any one of the above-mentioned methods.

[0113] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A multi-port valve thermal management system, comprising a heat exchanger (1), a motor-controlled cooling device (2), a low-temperature radiator (3), a condenser (4), a water-cooled PTC (5), a heater core (6), and a power battery pack (7); characterized in that: The heat exchanger (1), the motor control cooling device (2), the low-temperature radiator (3), the condenser (4), the water heating PTC (5), the warm air core (6), and the power battery pack (7) are all connected to a multi-way valve through a flow channel plate to form a circuit for the flow of coolant; The multi-way valve includes at least one movable valve core, which is used to switch the connection or closure between multiple pipelines; The multi-way valve includes at least a movable valve core that switches the plurality of pipelines to the following states: The motor control cooling device (2), the low-temperature radiator (3), and the multi-way valve are connected in series to form a motor control branch (10). The heat exchanger (1) is connected in series with the multi-way valve to form a heat exchanger branch (13). The power battery pack (7) is connected in series with the multi-way valve 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 the crew cabin heating branch (12). The heat exchanger branch (13) and the motor control branch (10) are interconnected through the multi-way valve to form a first circuit; The crew cabin heating branch (12) and the battery branch (11) are interconnected through the multi-way valve to form a second circuit; The crew cabin heating branch includes two parallel short-circuit lines (15) on the side connected to the multi-way valve. Of the two short-circuit lines (15), at least one of the short-circuit lines (15) can be closed by the first proportional three-way valve (16); The multi-way valve includes interfaces C1, C2, C3, C4, C5, C6, C7, and C8. Interfaces C1 and C2 are respectively connected to the outlet and inlet of the crew cabin heating branch (12), interfaces C3 and C4 are respectively connected to the inlet and outlet of the battery branch (11), interfaces C5 and C6 correspond to the inlet and outlet of the heat exchanger branch (13), and interfaces C7 and C8 correspond to the inlet and outlet of the motor control branch (10). Interfaces C1 and C3 are interconnected, interfaces C2 and C4 are interconnected, interfaces C6 and C7 are interconnected, and interfaces C5 and C8 are interconnected. The connection between the C1 interface and the condenser (4) is achieved by setting multiple tees at the location where the condenser (4) is connected to the two short-circuit pipelines (15); The connection between the C2 interface and the heating core (6) is achieved by setting multiple tees at the position where the heating core (6) connects to the two short-circuit pipelines (15); The low-temperature radiator (3) is connected in parallel with a second proportional three-way valve (17) so that the motor control branch (10) has a bypass function, and the corresponding flow rate of coolant is distributed through the second proportional three-way valve (17).

2. The multi-way valve thermal management system of claim 1, wherein, The motor control branch (10), the battery branch (11), and the crew cabin heating branch (12) are all equipped with coolant circulating water pumps (8).

3. The multi-port valve thermal management system of claim 1, wherein, A circuit for refrigerant to flow is provided between the heat exchanger (1) and the condenser (4); When the crew cabin heating branch (12) is in crew cabin heating or dehumidification mode, the heat comes from the condenser (4). If the heat is insufficient, the water heating PTC (5) will work to heat the coolant in the crew cabin heating branch (12) to meet the demand for warm air. The refrigerant carries heat and delivers it through the condenser (4) to the coolant in the crew cabin heating branch (12).

4. The multi-way valve thermal management system of claim 3, wherein, The circuit through which the refrigerant flows is provided with an evaporator (9), the heating core (6) is assembled with the evaporator (9) and is 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 located 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-port valve thermal management system according to claim 1, characterized in that, A condenser fan is provided at the low-temperature radiator (3); The condenser fan is used for auxiliary heat dissipation; and / or, A blower is provided at the warm air core (6), and the blower and the warm air core (6) are connected. The blower is used to accelerate the air passing through the warm air core (6) to achieve heat exchange.

6. The multi-port valve thermal management system according to claim 1, characterized in that, The flow channel plate includes multiple flow channels for conveying coolant. The multiple flow channels are arranged in parallel to each other and one end is connected to the multi-way valve. The other end is 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 warm air core (6), or the power battery pack (7).

7. A car, characterized in that, The multi-port valve thermal management system described in any one of claims 1 to 6 is adopted.

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