Thermal management system for vehicle

Abstract

A thermal management system for a vehicle, the thermal management system comprising a coolant circuit and a refrigerant circuit. The coolant circuit comprises: a first valve assembly (11); a first flow path (C1), the first flow path (C1) being coupled to the first valve assembly (11), and a high-voltage water heater (1) and a first heat exchange flow channel (21) of a first heat exchanger (2) being provided in the first flow path (C1); and a second flow path (C2), the second flow path (C2) being coupled to the first valve assembly (11), and a battery assembly (3) being provided in the second flow path (C2). A second heat exchange flow channel (22) of the first heat exchanger (2) is disposed in the refrigerant circuit. The first valve assembly (11) is configured such that at least one of the first flow path (C1) and the second flow path (C2) forms an independent circuit and / or the first flow path (C1) and the second flow path (C2) communicate with each other in series.

Description

Thermal management system of vehicle TECHNICAL FIELD

[0001] The present disclosure relates to a thermal management system of a vehicle. BACKGROUND

[0002] With the increasing emphasis on environmental protection, electric vehicles or hybrid vehicles have been more and more widely used. The thermal management system of a vehicle is mainly used for heating or cooling target objects such as vehicle passenger compartments, motors, batteries, etc., to help them maintain at a suitable temperature.

[0003] The current thermal management system is composed of a large number of components and connecting pipelines. In order to realize the switching of various thermal management modes of the vehicle, a plurality of stop valves and / or three-way valves are usually arranged in the loop or connecting pipelines of the thermal management system, which leads to complex loop connection of the thermal management system of the vehicle and thus leads to high cost. In addition, it is also difficult to quickly heat the vehicle cabin in a low temperature environment. SUMMARY

[0004] Therefore, the purpose of the present disclosure is to provide a thermal management system of a vehicle, which uses a multi-way valve to connect various cooling liquid loops, has simple loop connection, low cost, convenient and free switching of various thermal management modes, can connect various cooling liquid loops in series as one loop, and can realize quick heating of the vehicle cabin in a low temperature environment.

[0005] The above purpose is achieved by the thermal management system of a vehicle described below.

[0006] The present disclosure provides a thermal management system of a vehicle, which comprises a cooling liquid loop and a refrigerant loop, the cooling liquid loop comprising: a first valve assembly; a first flow path coupled to the first valve assembly, the first flow path being provided with a high-pressure water heater and a first heat exchange flow channel of a first heat exchanger; a second flow path coupled to the first valve assembly, the second flow path being provided with a battery assembly, wherein a second heat exchange flow channel of the first heat exchanger is provided in the refrigerant loop; and the first valve assembly is configured such that at least one of the first flow path and the second flow path constitutes a separate loop and / or the first flow path and the second flow path are in series communication with each other.

[0007] The thermal management system according to the present disclosure can also have one or more of the following features, alone or in combination.

[0008] In an embodiment, the first valve assembly has at least first to seventh ports; two ends of the first flow path are connected to the second port and the sixth port of the first valve assembly, respectively; two ends of the second flow path are connected to the first port and the third port of the first valve assembly, respectively; the cooling liquid circuit further comprises: a third flow path, two ends of the third flow path are connected to the fourth port and the fifth port of the first valve assembly, respectively, the third flow path is provided with a radiator; and a fourth flow path, two ends of the fourth flow path are connected to the fifth port and the seventh port of the first valve assembly, respectively, the fourth flow path is provided with a motor assembly; wherein the third flow path and the fourth flow path are connected to the fifth port through a first junction, and a fifth flow path is formed between the first junction and the fifth port.

[0009] In an embodiment, the first valve assembly has a first working condition, in which the first port, the third port and the fourth port of the first valve assembly are closed, the second port and the fifth port of the first valve assembly are in conduction, and the sixth port and the seventh port of the first valve assembly are in conduction.

[0010] In an embodiment, the first valve assembly has a second working condition, in which the fourth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are in conduction, the third port and the sixth port of the first valve assembly are in conduction, and the fifth port and the seventh port of the first valve assembly are in conduction.

[0011] In an embodiment, the first valve assembly has a third working condition, in which the fourth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are in conduction, the third port and the fifth port of the first valve assembly are in conduction, and the sixth port and the seventh port of the first valve assembly are in conduction.

[0012] In an embodiment, the first valve assembly has a fourth working condition, in which the fifth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are in conduction, the third port and the fourth port of the first valve assembly are in conduction, and the sixth port and the seventh port of the first valve assembly are in conduction.

[0013] In an embodiment, the first valve assembly has a fifth working condition, in which the first port, the third port and the fifth port of the first valve assembly are closed, the second port and the fourth port of the first valve assembly are in conduction, and the sixth port and the seventh port of the first valve assembly are in conduction.

[0014] In an embodiment, the first valve assembly has a sixth working condition in which the fifth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are in communication, the third port and the sixth port of the first valve assembly are in communication, and the fourth port and the seventh port of the first valve assembly are in communication.

[0015] In an embodiment, the first valve assembly has a seventh working condition in which the fourth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are in communication, the second port, the third port and the sixth port of the first valve assembly are in communication in a proportional manner.

[0016] In an embodiment, a first three-way structure is arranged at the first junction point.

[0017] In an embodiment, the first valve assembly is a single seven-way valve.

[0018] In an embodiment, the first valve assembly includes at least five three-way valves.

[0019] In an embodiment, the refrigerant circuit includes: a second valve assembly having at least first to fifth valve ports; a first refrigerant circuit having two ends connected to an outlet of a compressor and the first valve port of the second valve assembly, respectively, and provided with a built-in condenser; a second refrigerant circuit having two ends connected to the second valve port of the second valve assembly and an inlet of the compressor, respectively, and provided with a second junction point, a third junction point, a first heat exchange portion of the second heat exchanger, and a second heat exchange flow passage of the first heat exchanger; a third refrigerant circuit having two ends connected to the second junction point and an inlet of a second heat exchange portion of the second heat exchanger, respectively, and provided with an evaporator and a fourth junction point; a fourth refrigerant circuit having two ends connected to the fourth junction point and the fifth valve port of the second valve assembly, respectively, and provided with an evaporator-condenser and a fifth junction point; a fifth refrigerant circuit having two ends connected to the third valve port of the second valve assembly and the third junction point, respectively; and a sixth refrigerant circuit having two ends connected to the fourth valve port of the second valve assembly and the fifth junction point, respectively.

[0020] In an embodiment, the second valve assembly has a first communication state and a second communication state, in the first communication state, the first valve port and the second valve port of the second valve assembly are in communication, the third valve port and the fifth valve port of the second valve assembly are in communication, and the fourth valve port of the second valve assembly is closed; in the second communication state, the first valve port and the fifth valve port of the second valve assembly are in communication, the second valve port and the fourth valve port of the second valve assembly are in communication, and the third valve port of the second valve assembly is closed.

[0021] In an embodiment, a one-way valve is arranged on the fifth refrigerant circuit, which allows refrigerant to flow from the third valve port of the second valve assembly to the third junction point only.

[0022] The thermal management system of the present disclosure can use the first valve assembly to connect the cooling liquid circuit provided with the high-pressure water heater with the cooling liquid circuit provided with the first heat exchanger or the cooling liquid circuit provided with the motor assembly in series, or connect the three cooling liquid circuits in series, so as to provide an additional heat source for the cooling liquid circuit in an extremely low-temperature environment. In addition, the thermal management system of the present disclosure can use the first valve assembly and the second valve assembly to realize multiple thermal management modes, and the connection of the circuits is simple, the cost is low, and the switching of each thermal management mode is convenient and free. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments of the present disclosure will be briefly introduced below. The drawings are only used to show some embodiments of the present disclosure, and not to limit all embodiments of the present disclosure to this. In the drawings:

[0024] FIG. 1 shows a connection schematic diagram of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0025] FIG. 2 shows a schematic diagram of an air conditioning rapid heating mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0026] FIG. 3 shows a schematic diagram of an air conditioning heating battery or heat preservation mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0027] FIG. 4 shows a schematic diagram of a motor waste heat utilization mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0028] FIG. 5 shows a schematic diagram of a battery heating or heat preservation mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0029] FIG. 6 shows a schematic diagram of a heat pump heating mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0030] FIG. 7 shows a schematic diagram of a first water source heat pump mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0031] FIG. 8 shows a schematic diagram of a second water source heat pump mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0032] FIG. 9 shows a schematic diagram of a heat pump dehumidification mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0033] FIG. 10 shows a schematic diagram of a simple dehumidification mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0034] FIG. 11 shows a schematic diagram of an air conditioning refrigeration mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0035] FIG. 12 shows a schematic diagram of a battery refrigeration mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0036] FIG. 13 shows a schematic diagram of a wind source battery motor cooling mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0037] FIG. 14 shows a schematic diagram of a motor heat dissipation mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0038] FIG. 15 shows a schematic diagram of a motor insulation-very low temperature dual heating / parallel flow distribution mode of a thermal management system of a vehicle according to one embodiment of the present disclosure;

[0039] FIG. 16 shows a schematic diagram of a first valve assembly of a thermal management system of a vehicle according to another embodiment of the present disclosure;

[0040] FIGS. 17a-17d show schematic diagrams of a first working condition to a fourth working condition of the first valve assembly of FIG. 16; and

[0041] FIGS. 18a-18c show schematic diagrams of a fifth working condition to a seventh working condition of the first valve assembly of FIG. 16. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings of the embodiments of the present disclosure. The same reference signs in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0043] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein and the claims that follow is not intended to be limiting of the scope of the application. "First", "second", and similar terms are not intended to denote any order, quantity, or importance, but are used to distinguish one element from another. Also, the terms "a" and "an" and "one" and "said" and "the" are not intended to mean one and only one unless expressly so defined. The use of the terms "including", "containing", "having" and "comprising" and variations thereof are meant to encompass the components listed thereafter and equivalents thereof as well as additional components not specifically listed. The terms "connected" and "coupled" and variations thereof are intended to include a physical or mechanical connection or coupling between or among two or more elements. The terms "upper", "lower", "left", "right" and the like are used for description only and are not intended to limit the position or orientation of the described item. The terms "first", "second", "third", and the like, do not necessarily denote any ordinal, quantity or importance, but are used to distinguish one element from another.

[0044] Various embodiments of a thermal management system for a vehicle according to the present disclosure are described in detail below with reference to FIGS. 1-18c. The thermal management system according to the present disclosure can be used in a new energy vehicle, such as an electric vehicle, a hybrid vehicle, etc. The thermal management system includes a refrigerant circuit and a coolant circuit. The refrigerant is, for example, freon or propane, and the coolant is, for example, a mixed liquid of water and ethanol.

[0045] In one embodiment of the present disclosure, a vehicle, for example, an electric vehicle, comprises a thermal management system as shown in FIG. 1 for heating, cooling, etc. of the passenger cabin, battery and motor of the vehicle. The connection relationship between the various components in the thermal management system is schematically shown in FIG. 1. The thermal management system comprises a coolant circuit which can comprise a first valve assembly 11 having at least first to seventh ports, specifically D1 to D7. Of course, other numbers of ports are possible. The coolant circuit can further comprise a first flow path C1, a second flow path C2. The first flow path C1 is provided with a high-pressure water heater 1 and a first heat exchange flow channel 21 of a first heat exchanger 2. A second heat exchange flow channel 22 of the first heat exchanger 2 is provided in a refrigerant circuit. The second flow path C2 is provided with a battery assembly 3 which can be a battery temperature regulating device such as a cold plate on which a power battery of the vehicle is mounted. The first flow path C1 and the second flow path C2 can be coupled to the first valve assembly 11 which is configured such that at least one of the first flow path C1 and the second flow path C2 constitutes a separate circuit and / or the first flow path C1 and the second flow path C2 are in series communication with each other as described in detail below with reference to the accompanying drawings. For example, the first flow path C1 is connected at two ends thereof to the second port D2 and the sixth port D6 of the first valve assembly 11, respectively. For example, the first heat exchanger 2 is a cooler, often referred to as a chiller. In addition, the first flow path C1 is further provided with a first pump 17 which is provided upstream of the high-pressure water heater 1 in the fluid flow direction, specifically between the high-pressure water heater 1 and the sixth port D6. For example, the second flow path C2 is connected at two ends thereof to the first port D1 and the third port D3 of the first valve assembly 11, respectively. The meaning that the first flow path C1 or the second flow path C2 constitutes a separate circuit is that the coolant in the first flow path C1 can circulate in the first flow path C1, the coolant in the second flow path C2 can circulate in the second flow path C2, and the first flow path C1 and the second flow path C2 are not in series communication, i.e. constitute respective self-circulation. Therefore, when the ambient temperature is low, the coolant can be heated by the high-pressure water heater 1 on the first flow path C1, and the heat is transferred to the refrigerant circuit by the first heat exchanger 2 to achieve heat pump heating of the vehicle cabin at very low ambient temperature; at the same time, since the second flow path C2 where the battery assembly 3 is located is not in series with the first flow path C1, the heating of the coolant in the first flow path C1 by the high-pressure water heater 1 does not affect the temperature of the battery assembly 3. When the first flow path C1 and the second flow path C2 are in series communication with each other, the heating of the coolant by the high-pressure water heater 1 can heat the battery. When both at least one of the first flow path C1 and the second flow path C2 constitutes a separate circuit and the first flow path C1 and the second flow path C2 are in series communication with each other, proportional adjustment of the coolant in the two flow paths can be achieved.

[0046] In addition, the cooling liquid circuit can further include a third flow path C3, a fourth flow path C4, and a fifth flow path C5. The two ends of the third flow path C3 are connected to the fourth port D4 and the fifth port D5 of the first valve assembly 11, respectively, and the third flow path C3 is provided with the radiator 4, i.e., the low-temperature radiator. The two ends of the fourth flow path C4 are connected to the fifth port D5 and the seventh port D7 of the first valve assembly 11, respectively, and the fourth flow path C4 is provided with the motor assembly 5. For example, the motor assembly 5 includes a motor, a DCDC, etc. In addition, the fourth flow path C4 is further provided with the second pump 18, which is arranged upstream of the motor assembly 5 in the fluid flow direction, specifically between the motor assembly 5 and the fifth port D5. The third flow path C3 and the fourth flow path C4 are connected to the fifth port D5 through the first junction point J1, and the fifth flow path C5 is formed between the first junction point J1 and the fifth port D5.

[0047] For example, a first three-way structure can be arranged at the first junction point J1.

[0048] For example, the first valve assembly 11 is a single seven-way valve. In other examples, the first valve assembly 11 can be composed of multiple multi-way valves, as described below.

[0049] Referring again to FIG. 1, the refrigerant circuit included in the thermal management system can include a second valve assembly 12, a first refrigerant circuit L1, a second refrigerant circuit L2, a third refrigerant circuit L3, a fourth refrigerant circuit L4, a fifth refrigerant circuit L5, and a sixth refrigerant circuit L6. The second valve assembly 12 has at least first to fifth valve ports, i.e., V1 to V5. The two ends of the first refrigerant circuit L1 are connected to the outlet of the compressor 6 and the first valve port V1 of the second valve assembly 12, respectively, and the first refrigerant circuit L1 is provided with the built-in condenser 10. The two ends of the second refrigerant circuit L2 are connected to the second valve port V2 of the second valve assembly 12 and the inlet of the compressor 6, respectively, and the second refrigerant circuit L2 is provided with the second junction point J2, the third junction point J3, the first heat exchange part 71 of the second heat exchanger 7, and the second heat exchange flow path 22 of the first heat exchanger 2. An electronic expansion valve can be arranged near the inlet of the second heat exchange flow path 22 of the first heat exchanger 2, and the refrigerant flows into the second heat exchange flow path 22 of the first heat exchanger 2 after throttling expansion via the electronic expansion valve, evaporates and absorbs heat at the second heat exchange flow path 22 to exchange heat with the cooling liquid circuit. For example, the electronic expansion valve can be integrated with the first heat exchanger 2. It should be noted that, as shown in FIG. 1, the first heat exchanger 2 and the second heat exchanger 7 are arranged in parallel in the second refrigerant circuit L2. The electronic expansion valve can be integrated with the first heat exchanger 2 only for illustrative purposes, and it does not mean that the electronic expansion valve is located in the second heat exchange flow channel 22. The third refrigerant circuit L3 has two ends connected to the second junction point J2 and the inlet of the second heat exchange portion 72 of the second heat exchanger 7, respectively, and is provided with the evaporator 8 and the fourth junction point J4. For example, the second heat exchanger 7 is an internal heat exchanger. The second junction point J2 can be arranged near the outlet (i.e., the high-pressure outlet) of the first heat exchange portion 71 of the second heat exchanger 7. In the flow direction of the refrigerant, the fourth junction point J4 is located downstream of the second junction point J2. The fourth refrigerant circuit L4 has two ends connected to the fourth junction point J4 and the fifth valve port V5 of the second valve assembly 12, respectively, and is provided with the evaporator-condenser 9 and the fifth junction point J5. The fifth refrigerant circuit L5 has two ends connected to the third valve port V3 of the second valve assembly 12 and the third junction point J3, respectively. The sixth refrigerant circuit L6 has two ends connected to the fourth valve port V4 of the second valve assembly 12 and the fifth junction point J5, respectively.

[0050] The first heat exchange flow channel 21 of the first heat exchanger 2 is located in the coolant circuit, and the second heat exchange flow channel 22 of the first heat exchanger 2 is located in the refrigerant circuit, and the two circuits exchange heat at the first heat exchanger 2. For example, the heat recovery of the motor or the battery can be achieved. The high-pressure water heater 1 can also heat the refrigerant in the refrigerant circuit.

[0051] The built-in condenser 10 and the evaporator 8 can be arranged in the air conditioning housing of the vehicle. In the flow direction of the air, the built-in condenser 10 is located downstream of the evaporator 8. The thermal management system can also include a fan. In the air flow direction, the radiator 4, the evaporator-condenser 9 and the fan are arranged in sequence. For example, the air source heat pump mode can be achieved through the evaporator-condenser 9, as described below.

[0052] The fifth refrigerant circuit L5 is provided with a one-way valve 13, which only allows the refrigerant to flow from the third valve port V3 of the second valve assembly 12 to the third junction point J3.

[0053] The second refrigerant circuit L2 is also provided with a liquid storage dryer 16, which is located between the second valve port V2 of the second valve assembly 12 and the inlet (i.e., the high-pressure inlet) of the first heat exchange portion 71 of the second heat exchanger 7.

[0054] The fourth refrigerant circuit L4 is also provided with a first expansion valve 14, for example, an electronic expansion valve, which is specifically located between the fifth junction point J5 and the fourth junction point J4.

[0055] The third refrigerant circuit L3 is also provided with a second expansion valve 15, for example, a thermal expansion valve with a cutoff function, which is specifically located between the fourth junction point J4 and the evaporator 8.

[0056] In addition, various sensors are provided on the refrigerant circuit for measuring the pressure and / or temperature of the refrigerant in the circuit, indicated by P1, PT2. The sensor indicated by P1 is provided at or near the outlet of the first heat exchange portion 71 of the second heat exchanger 7, i.e. the high pressure outlet. The sensor indicated by PT2 is provided on the second refrigerant circuit L2, near the other outlet of the second heat exchange portion 72 of the second heat exchanger 7, i.e. the low pressure outlet.

[0057] It should be noted that a three-way structure can be provided at each junction herein, but the present disclosure is not limited thereto.

[0058] The first valve assembly 11 can have various working conditions, for example, a first working condition to a seventh working condition, to assist in achieving various modes of the thermal management system.

[0059] In the first working condition, the first port D1, the third port D3 and the fourth port D4 of the first valve assembly 11 are closed, the second port D2 and the fifth port D5 of the first valve assembly 11 are in conduction, and the sixth port D6 and the seventh port D7 of the first valve assembly 11 are in conduction.

[0060] In the second working condition, the fourth port D4 of the first valve assembly 11 is closed, the first port D1 and the second port D2 of the first valve assembly 11 are in conduction, the third port D3 and the sixth port D6 of the first valve assembly 11 are in conduction, and the fifth port D5 and the seventh port D7 of the first valve assembly 11 are in conduction.

[0061] In the third working condition, the fourth port D4 of the first valve assembly 11 is closed, the first port D1 and the second port D2 of the first valve assembly 11 are in conduction, the third port D3 and the fifth port D5 of the first valve assembly 11 are in conduction, and the sixth port D6 and the seventh port D7 of the first valve assembly 11 are in conduction.

[0062] In the fourth working condition, the fifth port D5 of the first valve assembly 11 is closed, the first port D1 and the second port D2 of the first valve assembly 11 are in conduction, the third port D3 and the fourth port D4 of the first valve assembly 11 are in conduction, and the sixth port D6 and the seventh port D7 of the first valve assembly 11 are in conduction.

[0063] In the fifth working condition, the first port D1, the third port D3 and the fifth port D5 of the first valve assembly 11 are closed, the second port D2 and the fourth port D4 of the first valve assembly 11 are in conduction, and the sixth port D6 and the seventh port D7 of the first valve assembly 11 are in conduction.

[0064] In the sixth operating condition, the fifth port D5 of the first valve assembly 11 is closed, the first port D1 and the second port D2 of the first valve assembly 11 are in communication, the third port D3 and the sixth port D6 of the first valve assembly 11 are in communication, and the fourth port D4 and the seventh port D7 of the first valve assembly 11 are in communication.

[0065] In the seventh operating condition, the fourth port D4 of the first valve assembly 11 is closed, the first port D1 and the second port D2 of the first valve assembly 11 are in communication, and the second port D2, the third port D3 and the sixth port D6 of the first valve assembly 11 are in communication in a proportional manner. The proportional adjustment of the first valve assembly 11 can be achieved by the structure of a common proportional adjustment valve.

[0066] Similarly, the second valve assembly 12 can have multiple communication states, such as a first communication state and a second communication state, to assist in achieving multiple modes of the thermal management system.

[0067] In the first communication state, the first valve port V1 and the second valve port V2 of the second valve assembly 12 are in communication, the third valve port V3 and the fifth valve port V5 of the second valve assembly 12 are in communication, and the fourth valve port V4 of the second valve assembly 12 is closed.

[0068] In the second communication state, the first valve port V1 and the fifth valve port V5 of the second valve assembly 12 are in communication, the second valve port V2 and the fourth valve port V4 of the second valve assembly 12 are in communication, and the third valve port V3 of the second valve assembly 12 is closed.

[0069] The first valve assembly 11 can be composed of multiple multi-way valves. For example, as shown in FIGS. 16 to 18c, the first valve assembly 11 includes at least five three-way valves. For example, the first valve assembly 11 can also include a combination of three-way valves and four-way valves.

[0070] As shown in FIG. 16, the first valve assembly 11 includes five three-way valves 31 to 35, and the connection relationship between the valve ports of each valve is shown in the figure, where the black triangle represents communication, and the straight line can represent pipeline connection. It should be noted that the outermost black square only schematically represents the first valve assembly 11. The first operating condition to the seventh operating condition of the first valve assembly 11 composed of the five three-way valves 31 to 35 are shown in FIGS. 17a to 18c.

[0071] As shown in FIG. 17a, in the first working condition, the valve port 311 and the valve port 313 of the three-way valve 31 are communicated, the valve port 312 of the three-way valve 31 is closed, the valve ports 321 to 323 of the three-way valve 32 are closed, the valve port 331 and the valve port 333 of the three-way valve 33 are communicated, the valve port 332 of the three-way valve 33 is closed, the valve port 343 and the valve port 342 of the three-way valve 34 are communicated, the valve port 341 of the three-way valve 34 is closed, the valve port 352 of the three-way valve 35 is closed, and the valve port 351 and the valve port 353 of the three-way valve 35 are communicated, so that the first port D1, the third port D3 and the fourth port D4 of the first valve assembly 11 are closed, the second port D2 and the fifth port D5 are communicated, and the sixth port D6 and the seventh port D7 are communicated.

[0072] As shown in FIG. 17b, in the second working condition, the valve port 311 and the valve port 312 of the three-way valve 31 are communicated, the valve port 313 of the three-way valve 31 is closed, the valve port 321 and the valve port 323 of the three-way valve 32 are communicated, the valve port 322 of the three-way valve 32 is closed, the valve ports 331 to 333 of the three-way valve 33 are closed, the valve port 343 of the three-way valve 34 is closed, the valve port 341 and the valve port 342 of the three-way valve 34 are communicated, the valve port 351 of the three-way valve 35 is closed, and the valve port 352 and the valve port 353 of the three-way valve 35 are communicated, so that the fourth port D4 of the first valve assembly 11 is closed, the first port D1 and the second port D2 are communicated, the third port D3 and the sixth port D6 are communicated, and the fifth port D5 and the seventh port D7 are communicated.

[0073] As shown in FIG. 17c, in the third working condition, the valve port 311 and the valve port 312 of the three-way valve 31 are communicated, the valve port 313 of the three-way valve 31 is closed, the valve port 321 and the valve port 322 of the three-way valve 32 are communicated, the valve port 323 of the three-way valve 32 is closed, the valve port 332 of the three-way valve 33 is closed, the valve port 331 and the valve port 333 of the three-way valve 33 are communicated, the valve port 343 and the valve port 342 of the three-way valve 34 are communicated, the valve port 341 of the three-way valve 34 is closed, the valve port 352 of the three-way valve 35 is closed, and the valve port 351 and the valve port 353 of the three-way valve 35 are communicated, so that the fourth port D4 of the first valve assembly 11 is closed, the first port D1 and the second port D2 are communicated, the third port D3 and the fifth port D5 are communicated, and the sixth port D6 and the seventh port D7 are communicated.

[0074] As shown in FIG. 17d, in the fourth working condition, the valve port 311 of the three-way valve 31 is communicated with the valve port 312, the valve port 313 of the three-way valve 31 is closed, the valve port 321 of the three-way valve 32 is communicated with the valve port 322, the valve port 323 of the three-way valve 32 is closed, the valve port 333 of the three-way valve 33 is closed, the valve port 331 of the three-way valve 33 is communicated with the valve port 332, the valve ports 341 to 343 of the three-way valve 34 are closed, the valve port 352 of the three-way valve 35 is closed, the valve port 351 of the three-way valve 35 is communicated with the valve port 353, so that the fifth port D5 of the first valve assembly 11 is closed, the first port D1 and the second port D2 are communicated, the third port D3 and the fourth port D4 are communicated, and the sixth port D6 and the seventh port D7 are communicated.

[0075] As shown in FIG. 18a, in the fifth working condition, the valve port 311 of the three-way valve 31 is communicated with the valve port 313, the valve port 312 of the three-way valve 31 is closed, the valve ports 321 to 323 of the three-way valve 32 are closed, the valve port 331 of the three-way valve 33 is communicated with the valve port 332, the valve port 333 of the three-way valve 33 is closed, the valve ports 341 to 343 of the three-way valve 34 are closed, the valve port 352 of the three-way valve 35 is closed, and the valve port 351 of the three-way valve 35 is communicated with the valve port 353, so that the first port D1, the third port D3 and the fifth port D5 of the first valve assembly 11 are closed, the second port D2 and the fourth port D4 are communicated, and the sixth port D6 and the seventh port D7 are communicated.

[0076] As shown in FIG. 18b, in the sixth working condition, the valve port 311 of the three-way valve 31 is communicated with the valve port 312, the valve port 313 of the three-way valve 31 is closed, the valve port 321 of the three-way valve 32 is communicated with the valve port 323, the valve port 322 of the three-way valve 32 is closed, the valve port 332 of the three-way valve 33 is communicated with the valve port 333, the valve port 331 of the three-way valve 33 is closed, the valve port 341 of the three-way valve 34 is communicated with the valve port 343, the valve port 342 of the three-way valve 34 is closed, the valve port 351 of the three-way valve 35 is closed, and the valve port 352 of the three-way valve 35 is communicated with the valve port 353, so that the fifth port D5 of the first valve assembly 11 is closed, the first port D1 and the second port D2 are communicated, the third port D3 and the sixth port D6 are communicated, the fourth port D4 and the seventh port D7 are communicated.

[0077] As shown in FIG. 18c, in the seventh working condition, the valve ports 311-313 of the three-way valve 31 are all open, the valve ports 321-323 of the three-way valve 32 are all open, the valve ports 331-333 of the three-way valve 33 are closed, the valve port 341 of the three-way valve 34 is open, the valve port 343 of the three-way valve 34 is closed, the valve port 351 of the three-way valve 35 is closed, the valve ports 352 and 353 of the three-way valve 35 are open, and the three-way valve 32 is a three-way proportional regulating valve, so that the fourth port D4 of the first valve assembly 11 is closed, the first port D1 and the second port D2 are open, and the second port D2 and the third port D3 are open to the sixth port D6 in a proportional regulating manner.

[0078] This embodiment using multiple three-way valves to achieve the first valve assembly through the pipeline connection provides more flexibility.

[0079] The various operating modes of the thermal management system will be described in detail below with reference to FIGS. 2-15. The thermal management system of the present disclosure can also have more modes than those shown in FIGS. 2-15. FIGS. 2-15 are described with reference to the connection diagram of FIG. 1, but these modes are also applicable to other possible thermal management systems different from FIG. 1. The dashed lines in the figures represent that the line has no fluid flow, and the arrows on the line only schematically show the direction of fluid flow.

[0080] As shown in FIG. 2, the thermal management system is in an air conditioning fast heating mode. In this mode, the first valve assembly 11 is in the first working condition, the second valve assembly 12 is in the first communication state, and the one-way valve 13 is in the closed state, the first expansion valve 14 is closed, the second expansion valve 15 is closed, and the first pump 17 and the second pump 18 can be turned on. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, which releases heat at the built-in condenser 10, then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, then flows to the electronic expansion valve via the second junction J2, expands after throttling by the electronic expansion valve, then flows to the second heat exchange channel 22 of the first heat exchanger 2 and exchanges heat (e.g., absorbs heat) with the cooling liquid circuit there, then flows to the compressor 6 via the third junction J3 and the second heat exchange part 72 of the second heat exchanger 7. The above refrigerant circuit realizes air conditioning heating. Since the first valve assembly 11 is in the first working condition, the first flow path C1 is in series communication with the fourth flow path C4. When the ambient temperature is low, resulting in poor performance of the heat pump, the high-pressure water heater 1 can be turned on to heat the cooling liquid in the cooling liquid circuit. In this way, the heat in the cooling liquid circuit can be transferred to the refrigerant circuit at the first heat exchange channel 21 of the first heat exchanger 2. The high-pressure water heater 1 can act as a heat source for the heat pump to achieve fast heating of the vehicle cabin.

[0081] As shown in FIG. 3, the thermal management system is in the air conditioning and heating battery or insulation mode. In this mode, the first valve assembly 11 is in the second working condition, the second valve assembly 12 is in the first communication state, and the one-way valve 13 is in the closed state, the first expansion valve 14 is closed, the second expansion valve 15 is closed, and the first pump 17 and the second pump 18 are opened. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas output by the compressor 1 releases heat at the built-in condenser 10, and then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, and then flows to the electronic expansion valve via the second joint point J2, and after throttling and expanding by the electronic expansion valve, flows to the second heat exchange flow channel 22 of the first heat exchanger 2 and exchanges heat (e.g. absorbs heat) with the cooling liquid circuit there, and then flows through the third joint point J3, the second heat exchange part 72 of the second heat exchanger 7 and returns to the compressor 6. The above refrigerant circuit realizes air conditioning and heating. Since the first valve assembly 11 is in the second working condition, the first flow path C1 and the second flow path C2 are in series communication, and the cooling liquid in the fourth flow path C4 is self-circulated. The high-pressure water heater 1 can be opened to heat the cooling liquid in the cooling liquid circuit, thereby realizing battery heating or insulation. In addition, the heat provided by the high-pressure water heater 1 can also be used for cabin heating.

[0082] As shown in FIG. 4, the thermal management system is in the motor waste heat utilization mode. In this mode, the first valve assembly 11 is in the third working condition, the second valve assembly 12 is in the first communication state, and the one-way valve 13 is open, the first expansion valve 14 is open, the second expansion valve 15 is open, the first pump 17 and the second pump 18 are on. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas output by the compressor 1 releases heat at the built-in condenser 10, and then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, a part of which flows to the electronic expansion valve via the second junction point J2, and after being throttled and expanded by the electronic expansion valve, it flows to the second heat exchange flow channel 22 of the first heat exchanger 2 and exchanges heat (for example, absorbs the heat of the coolant circuit) with the coolant circuit at the location, and then flows through the third junction point J3, the second heat exchange part 72 of the second heat exchanger 7 and returns to the compressor 6; a part flows to the fourth junction point J4. The refrigerant is divided into two parts at the fourth junction point J4, one part flows through the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7 in turn, and returns to the compressor 6; the other part flows through the first expansion valve 14, the fifth junction point J5, the evaporator-condenser 9, the fifth valve port V5 and the third valve port V3 of the second valve assembly 12, the one-way valve 13, the third junction point J3, the second heat exchange part 72 of the second heat exchanger 7 in turn, and returns to the compressor 6. The refrigerant evaporates and absorbs ambient heat at the evaporator-condenser 9, i.e. the evaporator-condenser 9 acts as an evaporator in this mode. Since the first valve assembly 11 is in the third working condition, the first flow path C1, the second flow path C2 and the fourth flow path C4 are in series communication. In this way, the heat from the motor assembly 5 can be used to heat the battery or transferred to the refrigerant circuit, thereby realizing motor waste heat utilization.

[0083] As shown in FIG. 5, the thermal management system is in the battery heating or insulation mode. In this mode, the first valve assembly 11 is in the second working condition, and the compressor 6 is off. Since the first valve assembly 11 is in the second working condition, the first flow path C1 and the second flow path C2 are in series communication, and the coolant in the fourth flow path C4 is self-circulated. The high-pressure water heater 1 can be turned on to heat the coolant in the coolant circuit, thereby realizing battery heating or insulation.

[0084] As shown in FIG. 6, the thermal management system is in a heat pump heating mode. In this mode, the first valve assembly 11 can be in the second working condition, the second valve assembly 12 is in the first communication state, and the one-way valve 13 is open, the first expansion valve 14 is open, the second expansion valve 15 is closed, and the first pump 17 and the second pump 18 are closed. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, which is output by the compressor 1, releases heat at the built-in condenser 10, and then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, and then sequentially flows through the first expansion valve 14, the fifth junction point J5, the evaporator-condenser 9, the fifth valve port V5 and the third valve port V3 of the second valve assembly 12, the one-way valve 13, the third junction point J3, the second heat exchange part 72 of the second heat exchanger 7, and returns to the compressor 6. At the evaporator-condenser 9, the refrigerant absorbs ambient heat and transfers heat to the air flowing into the vehicle cabin through the built-in condenser 10, thereby achieving heat pump heating.

[0085] As shown in FIG. 7, the thermal management system is in a first water source heat pump mode. In this mode, the first valve assembly 11 is in the fourth working condition, the second valve assembly 12 is in the first communication state, and the second expansion valve 15 is open, and the first pump 17 and the second pump 18 are open. In addition, the one-way valve 13 can be closed, and the first expansion valve 14 can be closed. In this case, the compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, which is output by the compressor 1, releases heat at the built-in condenser 10, and then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, and is divided into two parts at the second junction point J2, one part sequentially flows through the electronic expansion valve, the second heat exchange flow channel 22 of the first heat exchanger 2, the third junction point J3, the second heat exchange part 72 of the second heat exchanger 7, and returns to the compressor 6; the other part sequentially flows through the fourth junction point J4, the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7, and returns to the compressor 6. The refrigerant can absorb the heat of the cooling liquid circuit at the second heat exchange flow channel 22 of the first heat exchanger 2. Since the first valve assembly 11 is in the fourth working condition, the first flow path C1, the second flow path C2, the third flow path C3, and the fourth flow path C4 are connected in series. The third flow path C3 and the fourth flow path C4 are connected in series at the first junction point J1. At the radiator 4, the cooling liquid can absorb ambient heat. The heat in the cooling liquid can be transferred to the refrigerant circuit at the first heat exchange flow channel 21 of the first heat exchanger 2.

[0086] In another scenario related to Figure 7 , the electronic expansion valve near the inlet of the second heat exchange channel 22 of the first heat exchanger 2 can be closed (i.e., the first heat exchanger 2 is inoperative, and its first heat exchange channel 21 functions solely as a flow channel). The check valve 13 can be opened, and the first expansion valve 14 can be opened. After flowing through the first heat exchange section 71 of the second heat exchanger 7, the refrigerant is split into two parts at the fourth junction J4. One part flows sequentially through the second expansion valve 15, the evaporator 8, the second heat exchange section 72 of the second heat exchanger 7, and returns to the compressor 6. The other part flows sequentially through the first expansion valve 14, the fifth junction J5, the evaporator-condenser 9, the fifth valve port V5 and the third valve port V3 of the second valve assembly 12, the check valve 13, the third junction J3, the second heat exchange section 72 of the second heat exchanger 7, and returns to the compressor 6. At the radiator 4, the coolant can dissipate heat to the environment. At the evaporator-condenser 9, the refrigerant absorbs ambient heat, thereby acting as an evaporator. When the fan is turned on, the heat from the coolant dissipated by the radiator 4 can be transferred to the refrigerant in the evaporator-condenser 9, thereby realizing an air source heat pump and preventing the waste of heat generated by the motor and / or battery.

[0087] As shown in Figure 8, the thermal management system is in the second water-source heat pump mode. In this mode, the first valve assembly 11 is in the fifth operating state, the second valve assembly 12 is in the first communication state, the check valve 13 is closed, the first expansion valve 14 is closed, the second expansion valve 15 is open, and the first pump 17 and the second pump 18 are on. Compressor 6 compresses the refrigerant into high-temperature, high-pressure refrigerant gas. The high-temperature, high-pressure refrigerant gas output by compressor 1 releases heat in the built-in condenser 10 and then flows through the first valve port V1 and the second valve port V2 of the second valve assembly 12 to the first heat exchange section 71 of the second heat exchanger 7. It is then divided into two parts at the second junction J2. One part flows sequentially through the electronic expansion valve, the second heat exchange channel 22 of the first heat exchanger 2, the third junction J3, and the second heat exchange section 72 of the second heat exchanger 7, returning to compressor 6. The other part flows sequentially through the fourth junction J4, the second expansion valve 15, the evaporator 8, the second heat exchange section 72 of the second heat exchanger 7, and returns to compressor 6. The refrigerant absorbs heat from the coolant circuit in the second heat exchange channel 22 of the first heat exchanger 2. Because the first valve assembly 11 is in the fifth operating state, the first, third, and fourth flow paths C1, C3, and C4 are connected in series. The third and fourth flow paths C3 and C4 are connected in series at a first junction J1. At the radiator 4, the coolant absorbs ambient heat. Heat in the coolant is then transferred to the refrigerant circuit in the first heat exchange channel 21 of the first heat exchanger 2.

[0088] In the modes of Figures 8 and 9, when the compressor 6 provides sufficient heat to the passenger compartment, the high-pressure water heater 1 may not be turned on, or the high-pressure water heater 1 may be turned on to heat the coolant.

[0089] As shown in FIG. 9, the thermal management system is in the heat pump dehumidification mode. In this mode, the first valve assembly 11 is in the fourth working condition, the second valve assembly 12 is in the first communication state, and the one-way valve 13 is open, the first expansion valve 14 is open, the second expansion valve 15 is open, the first pump 17 and the second pump 18 are on. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas output by the compressor 1 releases heat at the built-in condenser 10, and then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, the electronic expansion valve near the inlet of the second heat exchange flow channel 22 of the first heat exchanger 2 is closed (i.e., the first heat exchanger 2 does not work, and its first heat exchange flow channel 21 only acts as a flow channel), so that the refrigerant flows to the fourth junction J4. The refrigerant is divided into two parts at the fourth junction J4, one part flows through the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7 in turn, and returns to the compressor 6; the other part flows through the first expansion valve 14, the fifth junction J5, the evaporator-condenser 9, the fifth valve port V5 and the third valve port V3 of the second valve assembly 12, the one-way valve 13, the third junction J3, the second heat exchange part 72 of the second heat exchanger 7 in turn, and returns to the compressor 6. At the evaporator-condenser 9, the refrigerant evaporates and absorbs environmental heat. Since the first valve assembly 11 is in the fourth working condition, the first flow path C1, the second flow path C2, the third flow path C3, and the fourth flow path C4 are connected in series. The third flow path C3 and the fourth flow path C4 are connected in series at the first junction J1. At the radiator 4, the cooling liquid can release heat to the environment (i.e., air), which can be absorbed by the evaporator-condenser 9.

[0090] As shown in FIG. 10, the thermal management system is in a simple dehumidification mode. In this mode, the first valve assembly 11 is in the sixth working condition, the second valve assembly 12 is in the second communication state, and the one-way valve 13 is in the closed state, the first expansion valve 14 is closed, the second expansion valve 15 is open, the first pump 17 and the second pump 18 are on. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas output by the compressor 1 releases heat at the built-in condenser 10, and then flows through the first valve port V1 and the fifth valve port V5 of the second valve assembly 12, the evaporator-condenser 9, the fifth junction point J5, the fourth valve port V4 and the second valve port V2 of the second valve assembly 12, the first heat exchange part 71 of the second heat exchanger 7 in turn. The electronic expansion valve near the inlet of the second heat exchange flow channel 22 of the first heat exchanger 2 is closed (i.e., the first heat exchanger 2 does not work, and its first heat exchange flow channel 21 only acts as a flow channel), so that the refrigerant flows to the fourth junction point J4. After flowing through the fourth junction point J4, the refrigerant flows through the second expansion valve 15, the evaporator 8, and the second heat exchange part 72 of the second heat exchanger 7 in turn, and returns to the compressor 6. At the evaporator-condenser 9, the refrigerant can release heat to the environment. Since the first valve assembly 11 is in the sixth working condition, the first flow path C1 and the second flow path C2 are in series communication, and the third flow path C3 and the fourth flow path C4 are in series communication. The third flow path C3 and the fourth flow path C4 are in series communication at the first junction point J1. At the radiator 4, the cooling liquid exchanges heat with the air, for example, releases heat to the environment.

[0091] As shown in FIG. 11, the thermal management system is in air conditioning refrigeration mode. In this mode, the first valve assembly 11 is in the sixth working condition, the second valve assembly 12 is in the second communication state, and the one-way valve 13 is closed, the first expansion valve 14 is closed, the second expansion valve 15 is open, the first pump 17 and the second pump 18 are turned on. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, and the high-temperature and high-pressure refrigerant output by the compressor 1 flows through the built-in condenser 10 (the corresponding air door in the air conditioning shell is closed, the air entering the cabin cannot flow through the built-in condenser 10, and the built-in condenser 10 only acts as a flow passage), the first valve port V1 and the fifth valve port V5 of the second valve assembly 12, the evaporator-condenser 9, the fifth junction point J5, the fourth valve port V4 and the second valve port V2 of the second valve assembly 12, the first heat exchange part 71 of the second heat exchanger 7 in turn. At the evaporator-condenser 9, the refrigerant condenses to dissipate heat to the environment, i.e. the evaporator-condenser 9 acts as a condenser in this mode. The electronic expansion valve near the inlet of the second heat exchange flow channel 22 of the first heat exchanger 2 is closed, so that the refrigerant flows to the fourth junction point J4. After the refrigerant flows through the fourth junction point J4, it flows through the second expansion valve 15, the evaporator 8, and the second heat exchange part 72 of the second heat exchanger 7 in turn, and returns to the compressor 6. Since the first valve assembly 11 is in the sixth working condition, the first flow path C1 and the second flow path C2 are in series communication, and the third flow path C3 and the fourth flow path C4 are in series communication. The third flow path C3 and the fourth flow path C4 are in series communication at the first junction point J1. At the radiator 4, the coolant exchanges heat with the air, for example, releases heat to the environment. For example, the heat generated by the motor assembly 5 can be transferred to the air.

[0092] As shown in FIG. 12, the thermal management system is in the battery refrigeration mode. In this mode, the first valve assembly 11 is in the sixth working condition, the second valve assembly 12 is in the second communication state, and the one-way valve 13 is in the closed state, the first expansion valve 14 is closed, the second expansion valve 15 is closed, and the first pump 17 and the second pump 18 are opened. The compressor 6 compresses the refrigerant into high-temperature and high-pressure refrigerant gas, the high-temperature and high-pressure refrigerant gas output by the compressor 1 releases heat at the built-in condenser 10, and then sequentially flows through the first valve port V1 and the fifth valve port V5 of the second valve assembly 12, the evaporator-condenser 9, the fifth junction point J5, the fourth valve port V4 and the second valve port V2 of the second valve assembly 12, the first heat exchange part 71 of the second heat exchanger 7. The refrigerant then sequentially flows through the second junction point J2, the electronic expansion valve, the second heat exchange flow channel 22 of the first heat exchanger 2, the third junction point J3, the second heat exchange part 72 of the second heat exchanger 7, and returns to the compressor 6. At the evaporator-condenser 9, the refrigerant condenses to release heat to the environment, i.e., the evaporator-condenser 9 acts as a condenser in this mode. At the second heat exchange flow channel 22 of the first heat exchanger 2, the refrigerant absorbs the heat of the cooling liquid circuit. Since the first valve assembly 11 is in the sixth working condition, the first flow path C1 and the second flow path C2 are in series communication, and the third flow path C3 and the fourth flow path C4 are in series communication. The third flow path C3 and the fourth flow path C4 are in series communication at the first junction point J1. At the radiator 4, the cooling liquid exchanges heat with the air, for example, releasing heat to the environment. For example, the heat generated by the motor assembly 5 can be transferred to the air. It can be said that in this mode, the battery is refrigerated by the first heat exchanger 2.

[0093] As shown in FIG. 13, the thermal management system is in the air source battery motor cooling mode. In this mode, the first valve assembly 11 is in the fourth working condition, and the first pump 17 and the second pump 18 are opened, and the compressor 6 is closed. Since the first valve assembly 11 is in the fourth working condition, the first flow path C1, the second flow path C2, the third flow path C3, and the fourth flow path C4 are in series communication. The third flow path C3 and the fourth flow path C4 are in series communication at the first junction point J1. At the radiator 4, the cooling liquid exchanges heat with the air, for example, releasing heat to the environment. For example, the heat generated by the motor assembly 5 and the battery assembly 3 can be transferred to the air, achieving air source heat dissipation. It can be said that in this mode, the motor and the battery are cooled by the radiator 4.

[0094] Similar to FIG. 13, in another example not shown in the drawings, the first valve assembly 11 can have another working condition different from the first to seventh working conditions. In this another working condition, the first port D1 is in communication with the second port D2, the third port D3 is in communication with the fourth port D4, the fifth port D5 is in communication with the sixth port D6, and the seventh port D7 is closed, so that the first flow path CI, the second flow path C2, and the third flow path C3 are in series communication, and only the heat generated by the battery is transferred to the environment through the radiator 4, so that the air source battery cooling can be achieved.

[0095] As shown in FIG. 14, the thermal management system is in the motor cooling mode. In this mode, the first valve assembly 11 is in the sixth working condition, and the compressor 6 is closed, and the electronic expansion valve near the second heat exchange flow passage 22 inlet of the first heat exchanger 2 is closed (i.e., the first heat exchanger 2 does not work). Since the first valve assembly 11 is in the sixth working condition, the third flow path C3 and the fourth flow path C4 are in series communication. The third flow path C3 and the fourth flow path C4 are in series communication at the first junction point J1. At the radiator 4, the coolant exchanges heat with the air, for example, releases heat to the environment. For example, the heat generated by the motor assembly 5 can be transferred to the air, thereby achieving motor cooling.

[0096] As shown in FIG. 15, the thermal management system is in the motor insulation-very low temperature dual heating / parallel flow distribution mode. In this mode, the first valve assembly 11 is in the seventh working condition, the second valve assembly 12 is in the first communication state, and the one-way valve 13 is in the closed state, the first expansion valve 14 is closed, the second expansion valve 15 is closed, and the first pump 17 is opened. For example, the compressor 6 can be opened, the high-temperature and high-pressure refrigerant gas output by the compressor 1 releases heat at the built-in condenser 10, and then flows to the first heat exchange part 71 of the second heat exchanger 7 via the first valve port V1 and the second valve port V2 of the second valve assembly 12, and then flows to the second heat exchange flow channel 22 of the first heat exchanger 2 via the second junction J2 and the electronic expansion valve, and exchanges heat (e.g., absorbs heat) with the cooling liquid circuit at the second heat exchange flow channel 22 of the first heat exchanger 2, and then flows to the compressor 6 via the third junction J3 and the second heat exchange part 72 of the second heat exchanger 7. Due to the first valve assembly 11 being in the seventh working condition, there is a combination of the first flow path C1 self-circulation (i.e., the first flow path C1 constitutes a separate circuit) and the first flow path C1 and the second flow path C2 in series communication. In this mode, the heat provided by the high-pressure water heater 1 opened can be proportionally distributed to the cooling liquid flowing to the first heat exchanger 2 and the battery assembly 3, and the proportion can be predetermined. Therefore, the temperature rise at the first heat exchanger 2 and the battery assembly 3 can be achieved in a very low temperature environment, and the heat provided to both can be achieved in a certain proportion. In a very low temperature environment, the compressor 6 is opened and the high-pressure water heater 1 is opened, so that very low temperature dual heating can be achieved. The second pump 18 can be opened, and the fifth port D5 and the seventh port D7 of the first valve assembly 11 are conductive, so that the cooling liquid in the fourth flow path C4 is self-circulated, thereby achieving motor insulation.

[0097] As described above, by using the first valve assembly, the cooling liquid circuit provided with the high-pressure water heater can be connected in series with the cooling liquid circuit provided with the first heat exchanger or the cooling liquid circuit provided with the motor assembly, or the three cooling liquid circuits can be connected in series, so that an additional heat source can be provided for the cooling liquid circuit in a very low temperature environment. In particular, rapid cabin heating in a low temperature environment can be achieved. In addition, by using the first valve assembly and the second valve assembly, a plurality of thermal management modes can be achieved, the circuit connection is simple, the cost is low, and the switching of each thermal management mode is convenient and free.

[0098] The technical features disclosed above are not limited to the combinations disclosed with other features, and other combinations between technical features can be made by those skilled in the art according to the purpose of the application, and the purpose of the present disclosure is achieved.

Claims

1. A thermal management system for a vehicle, characterized in that: The thermal management system includes a coolant circuit and a refrigerant circuit, wherein the coolant circuit includes: a first valve assembly (11); a first flow path (C1), the first flow path (C1) being coupled to the first valve assembly (11), the first flow path (C1) being provided with a high-pressure water heater (1) and a first heat exchange passage (21) of a first heat exchanger (2); and a second flow path (C2), the second flow path (C2) being coupled to the first valve assembly (11), the second flow path (C2) being provided with a battery assembly (3), Wherein, the second heat exchange channel (22) of the first heat exchanger (2) is arranged in the refrigerant circuit; and The first valve assembly (11) is configured such that at least one of the first flow path (C1) and the second flow path (C2) constitutes a separate circuit and / or the first flow path (C1) and the second flow path (C2) are connected to each other in series.

2. The thermal management system according to claim 1, characterized in that The first valve assembly (11) has at least first to seventh ports; The two ends of the first flow path (C1) are respectively connected to the second port (D2) and the sixth port (D6) of the first valve assembly (11); The two ends of the second flow path (C2) are respectively connected to the first port (D1) and the third port (D3) of the first valve assembly (11); The coolant circuit also includes: a third flow path (C3), the two ends of the third flow path (C3) being respectively connected to the fourth port (D4) and the fifth port (D5) of the first valve assembly (11), and the third flow path (C3) being provided with a radiator (4); and a fourth flow path (C4), the two ends of the fourth flow path (C4) being respectively connected to the fifth port (D5) and the seventh port (D7) of the first valve assembly (11), and the fourth flow path (C4) being provided with a motor assembly (5); The third flow path (C3) and the fourth flow path (C4) are connected to the fifth port (D5) through a first junction (J1), and a fifth flow path (C5) is formed between the first junction (J1) and the fifth port (D5).

3. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a first operating state, In the first operating condition, the first port (D1), the third port (D3) and the fourth port (D4) of the first valve assembly (11) are closed, the second port (D2) and the fifth port (D5) of the first valve assembly (11) are connected, and the sixth port (D6) and the seventh port (D7) of the first valve assembly (11) are connected.

4. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a second operating state, In the second operating condition, the fourth port (D4) of the first valve assembly (11) is closed, the first port (D1) and the second port (D2) of the first valve assembly (11) are connected, the third port (D3) and the sixth port (D6) of the first valve assembly (11) are connected, and the fifth port (D5) and the seventh port (D7) of the first valve assembly (11) are connected.

5. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a third operating state, In the third operating condition, the fourth port (D4) of the first valve assembly (11) is closed, the first port (D1) and the second port (D2) of the first valve assembly (11) are connected, the third port (D3) and the fifth port (D5) of the first valve assembly (11) are connected, and the sixth port (D6) and the seventh port (D7) of the first valve assembly (11) are connected.

6. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a fourth operating state, In the fourth operating condition, the fifth port (D5) of the first valve assembly (11) is closed, the first port (D1) and the second port (D2) of the first valve assembly (11) are connected, the third port (D3) and the fourth port (D4) of the first valve assembly (11) are connected, and the sixth port (D6) and the seventh port (D7) of the first valve assembly (11) are connected.

7. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a fifth operating state, In the fifth operating condition, the first port (D1), the third port (D3) and the fifth port (D5) of the first valve assembly (11) are closed, the second port (D2) and the fourth port (D4) of the first valve assembly (11) are connected, and the sixth port (D6) and the seventh port (D7) of the first valve assembly (11) are connected.

8. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a sixth operating state, In the sixth operating condition, the fifth port (D5) of the first valve assembly (11) is closed, the first port (D1) and the second port (D2) of the first valve assembly (11) are connected, the third port (D3) and the sixth port (D6) of the first valve assembly (11) are connected, and the fourth port (D4) and the seventh port (D7) of the first valve assembly (11) are connected.

9. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) has a seventh operating state, In the seventh operating condition, the fourth port (D4) of the first valve assembly (11) is closed, the first port (D1) and the second port (D2) of the first valve assembly (11) are connected, and the second port (D2) and the third port (D3) of the first valve assembly (11) are respectively connected to the sixth port (D6) in a proportionally adjusted manner.

10. The thermal management system according to claim 2, wherein: A first three-way structure is provided at the first junction (J1).

11. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) is a single seven-way valve.

12. The thermal management system according to claim 1 or 2, characterized in that: The first valve assembly (11) comprises at least five three-way valves.

13. The thermal management system according to claim 1 or 2, characterized in that: The refrigerant circuit comprises: A second valve assembly (12) having at least first to fifth valve ports; a first refrigerant circuit (L1), wherein both ends of the first refrigerant circuit (L1) are respectively connected to the outlet of the compressor (6) and the first valve port (V1) of the second valve assembly (12), and the first refrigerant circuit is provided with a built-in condenser (10); a second refrigerant circuit (L2), wherein both ends of the second refrigerant circuit are respectively connected to the second valve port (V2) of the second valve assembly (12) and the inlet of the compressor (6), and the second refrigerant circuit is provided with a second junction (J2), a third junction (J3), a first heat exchange portion (71) of the second heat exchanger (7), and a second heat exchange flow channel (22) of the first heat exchanger (2); a third refrigerant circuit (L3), wherein both ends of the third refrigerant circuit (L3) are respectively connected to the second junction (J2) and the inlet of the second heat exchange portion (72) of the second heat exchanger (7), and the third refrigerant circuit is provided with an evaporator (8) and a fourth junction (J4); a fourth refrigerant circuit (L4), wherein both ends of the fourth refrigerant circuit (L4) are respectively connected to the fourth junction (J4) and the fifth valve port (V5) of the second valve assembly (12), and the fourth refrigerant circuit (L4) is provided with an evaporator-condenser (9) and a fifth junction (J5); a fifth refrigerant circuit (L5), wherein both ends of the fifth refrigerant circuit (L5) are respectively connected to the third valve port (V3) of the second valve assembly (12) and the third junction (J3); and A sixth refrigerant circuit (L6), wherein both ends of the sixth refrigerant circuit (L6) are respectively connected to the fourth valve port (V4) of the second valve assembly (12) and the fifth junction (J5).

14. The thermal management system according to claim 13, wherein: The second valve assembly (12) has a first communication state and a second communication state, In the first communication state, the first valve port (V1) and the second valve port (V2) of the second valve assembly (12) are connected, the third valve port (V3) and the fifth valve port (V5) of the second valve assembly (12) are connected, and the fourth valve port (V4) of the second valve assembly (12) is closed; In the second connected state, the first valve port (V1) and the fifth valve port (V5) of the second valve assembly (12) are connected, the second valve port (V2) and the fourth valve port (V4) of the second valve assembly (12) are connected, and the third valve port (V3) of the second valve assembly (12) is closed.

15. The thermal management system according to claim 14, characterized in that: A one-way valve (13) is provided on the fifth refrigerant circuit (L5), and the one-way valve only allows the refrigerant to flow from the third valve port (V3) of the second valve assembly (12) to the third junction (J3).

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