Thermal management system for vehicle

Abstract

The present disclosure provides a thermal management system of a vehicle, the thermal management system including a coolant circuit and a refrigerant circuit, the coolant circuit including: a first valve assembly; the first flow path is coupled to and provided with a high-pressure water heater and a first heat exchange flow channel of the first heat exchanger; the second flow path is coupled to the first valve assembly, the second flow path is provided with a battery assembly, and a second heat exchange flow channel of the first heat exchanger is arranged in the refrigerant loop; and the first valve assembly is configured to enable at least one of the first flow path and the second flow path to form an independent loop and / or enable the first flow path and the second flow path to communicate in series.

Description

Technical Field

[0001] The present disclosure relates to a thermal management system for a vehicle. Background Art

[0002] As people pay more and more attention to environmental protection, electric vehicles or hybrid vehicles have been more and more widely used. The vehicle's thermal management system is mainly used to heat up or cool down the vehicle's passenger compartment, motor, battery and other target objects to help them maintain a suitable temperature.

[0003] The current thermal management system is composed of many components and connecting pipelines. In order to switch between various thermal management modes of the vehicle, it is usually necessary to set multiple shut-off valves and / or three-way valves in the circuit or connecting pipeline of the thermal management system, which makes the circuit connection of the vehicle's thermal management system complicated and thus leads to high costs. In addition, it is also difficult to quickly heat the cabin in a low temperature environment. Utility Model Content

[0004] Therefore, the purpose of the present disclosure is to provide a vehicle thermal management system, which uses a multi-way valve to connect various coolant circuits. The circuit connection is simple and low-cost, the switching of various thermal management modes is convenient and free, the coolant circuits can be connected in series into one circuit, and rapid heating of the cabin can be achieved in a low-temperature environment.

[0005] The above objects are achieved by a thermal management system for a vehicle as described below.

[0006] The present disclosure provides a thermal management system for a vehicle, the thermal management system includes a coolant circuit and a refrigerant circuit, the coolant circuit includes: a first valve assembly; a first flow path, the first flow path is coupled to the first valve assembly, the first flow path is provided with a high-pressure water heater and a first heat exchange channel of a first heat exchanger; a second flow path, the second flow path is coupled to the first valve assembly, the second flow path is provided with a battery assembly, wherein the second heat exchange channel of the first heat exchanger is arranged in the refrigerant circuit; and the first valve assembly is configured so that at least one of the first flow path and the second flow path constitutes a separate circuit and / or the first flow path and the second flow path are connected in series with each other.

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

[0008] In one embodiment, the first valve assembly has at least the first to seventh ports; the two ends of the first flow path are respectively connected to the second port and the sixth port of the first valve assembly; the two ends of the second flow path are respectively connected to the first port and the third port of the first valve assembly; the coolant circuit also includes: a third flow path, the two ends of the third flow path are respectively connected to the fourth port and the fifth port of the first valve assembly, and the third flow path is provided with a radiator; and a fourth flow path, the two ends of the fourth flow path are respectively connected to the fifth port and the seventh port of the first valve assembly, and 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 one embodiment, the first valve assembly has a first operating condition. Under the first operating condition, 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 connected, and the sixth port and the seventh port of the first valve assembly are connected.

[0010] In one embodiment, the first valve assembly has a second operating condition. Under the second operating condition, the fourth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are connected, the third port and the sixth port of the first valve assembly are connected, and the fifth port and the seventh port of the first valve assembly are connected.

[0011] In one embodiment, the first valve assembly has a third operating condition. Under the third operating condition, the fourth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are connected, the third port and the fifth port of the first valve assembly are connected, and the sixth port and the seventh port of the first valve assembly are connected.

[0012] In one embodiment, the first valve assembly has a fourth operating condition. Under the fourth operating condition, the fifth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are connected, the third port and the fourth port of the first valve assembly are connected, and the sixth port and the seventh port of the first valve assembly are connected.

[0013] In one embodiment, the first valve assembly has a fifth operating condition. Under the fifth operating condition, 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 connected, and the sixth port and the seventh port of the first valve assembly are connected.

[0014] In one embodiment, the first valve assembly has a sixth operating condition. Under the sixth operating condition, the fifth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are connected, the third port and the sixth port of the first valve assembly are connected, and the fourth port and the seventh port of the first valve assembly are connected.

[0015] In one embodiment, the first valve assembly has a seventh operating condition. Under the seventh operating condition, the fourth port of the first valve assembly is closed, the first port and the second port of the first valve assembly are connected, and the second port and the third port of the first valve assembly are respectively connected to the sixth port in a proportionally adjusted manner.

[0016] In one embodiment, a first three-way structure is provided at the first joining point.

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

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

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

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

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

[0022] The thermal management system disclosed in the present invention can connect the coolant circuit provided with the high-pressure water heater in series with the coolant circuit provided with the first heat exchanger or the coolant circuit provided with the motor component by using the first valve assembly, or connect the three coolant circuits in series, thereby providing an additional heat source for the coolant circuit in an extremely low temperature environment. In addition, the thermal management system disclosed in the present invention can realize multiple thermal management modes by using the first valve assembly and the second valve assembly, with simple circuit connection, low cost, and convenient and free switching of various thermal management modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings of the embodiments of the present disclosure. The drawings are only used to illustrate some embodiments of the present disclosure, but not to limit all embodiments of the present disclosure to them. In the drawings:

[0024] Figure 1 A connection diagram of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0025] Figure 2 A schematic diagram showing an air conditioning rapid heating mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0026] Figure 3 A schematic diagram showing an air conditioning battery heating or warm keeping mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0027] Figure 4 A schematic diagram showing a motor waste heat utilization mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0028] Figure 5 A schematic diagram showing a battery heating or keeping warm mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

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

[0030] Figure 7 A schematic diagram showing a first water source heat pump mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0031] Figure 8 A schematic diagram showing a second water source heat pump mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0032] Fig. 9 A schematic diagram showing a heat pump dehumidification mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0033] Fig.10 A schematic diagram showing a simple dehumidification mode of a thermal management system of a vehicle according to an embodiment of the present disclosure;

[0034] Fig.11 A schematic diagram showing an air conditioning cooling mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0035] Fig.12 A schematic diagram showing a battery cooling mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0036] Fig.13 A schematic diagram showing a wind source battery motor cooling mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0037] Fig.14 A schematic diagram showing a motor heat dissipation mode of a thermal management system of a vehicle according to an embodiment of the present disclosure is shown;

[0038] Fig.15 A schematic diagram showing a motor heat preservation-ultra-low temperature dual heating / parallel flow distribution mode of a thermal management system for a vehicle according to an embodiment of the present disclosure is shown;

[0039] Fig.16 A schematic diagram showing a first valve assembly of a thermal management system of a vehicle according to another embodiment of the present disclosure is shown;

[0040] Figures 17a to 17d Shows Fig.16 Schematic diagrams of first to fourth operating conditions of the first valve assembly; and

[0041] Figures 18a to 18c Shows Fig.16 Schematic diagram of the fifth to seventh operating conditions of the first valve assembly. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in combination with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include", "comprise" or "have" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to the physical or mechanical connections or connections shown in the drawings, but may include connections or connections equivalent thereto, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] Reference below Figures 1 to 18c Various embodiments of a thermal management system for a vehicle according to an embodiment of the present disclosure are described in detail. The thermal management system according to the present disclosure can be used in new energy vehicles, such as electric vehicles, hybrid vehicles, 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, such as an electric vehicle, includes Figure 1 The thermal management system shown is used for heating and cooling the vehicle's passenger compartment, battery, and motor. Figure 1The connection relationship between the various components in the thermal management system is schematically shown in FIG. The coolant circuit included in the thermal management system may include a first valve assembly 11, which has at least the first to seventh ports, specifically D1 to D7. Of course, other numbers of ports are also possible. The coolant circuit may also include a first flow path C1 and 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 the first heat exchanger 2. The second heat exchange flow channel 22 of the first heat exchanger 2 is arranged in the refrigerant circuit. The second flow path C2 is provided with a battery assembly 3, and the battery assembly 3 may be a battery temperature regulating device such as a cold plate, on which the power battery of the vehicle is installed. The first flow path C1 and the second flow path C2 may be coupled to the first valve assembly 11, respectively, and the first valve assembly 11 is configured so 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 in series with each other, as described in detail below with reference to the accompanying drawings. For example, 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. For example, the first heat exchanger 2 is a cooler, often called a chiller. In addition, the first flow path C1 is also provided with a first pump 17, which is arranged upstream of the high-pressure water heater 1 in the direction of fluid flow, specifically between the high-pressure water heater 1 and the sixth port D6. For example, 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 first flow path C1 or the second flow path C2 constitutes a separate loop, which means that the coolant in the first flow path C1 can circulate in the first flow path C1, and the coolant in the second flow path C2 can circulate in the second flow path C2. The first flow path C1 and the second flow path C2 are not connected in series, that is, they constitute their own 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 can be transferred to the refrigerant circuit through the first heat exchanger 2, so as to realize the heat pump heating of the cabin at extremely low ambient temperature; at the same time, since the second flow path C2 where the battery assembly 3 is located is not connected in series with the first flow path C1, the high-pressure water heater 1 heating the coolant in the first flow path C1 will not affect the temperature of the battery assembly 3. When the first flow path C1 and the second flow path C2 are connected in series, the battery can be heated by heating the coolant through the high-pressure water heater 1. When at least one of the first flow path C1 and the second flow path C2 forms a separate circuit, and the first flow path C1 and the second flow path C2 are connected in series, the ratio of the coolant in the two flow paths can be adjusted.

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

[0047] For example, a first three-way structure may be provided at the first junction J1.

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

[0049] See again Figure 1 The refrigerant circuit included in the thermal management system may 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 the first to fifth valve ports, namely V1 to V5. The two 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 L1 is provided with a built-in condenser 10. The two ends of the second refrigerant circuit L2 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 L2 is provided with a second junction point J2, a third junction point 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. An electronic expansion valve may be provided near the inlet of the second heat exchange flow channel 22 of the first heat exchanger 2. The refrigerant flows into the second heat exchange flow channel 22 of the first heat exchanger 2 after throttling and expansion through the electronic expansion valve, and evaporates and absorbs heat in the second heat exchange flow channel 22 to exchange heat with the coolant circuit. For example, the electronic expansion valve may be integrated with the first heat exchanger 2. It should be noted that, if Figure 1 As shown in the figure, It is only a schematic representation that the electronic expansion valve can be integrated with the first heat exchanger 2, and does not mean that the electronic expansion valve is located in the second heat exchange flow channel 22. The two ends of the third refrigerant circuit L3 are respectively connected to the second junction J2 and the inlet of the second heat exchange part 72 of the second heat exchanger 7, and the third refrigerant circuit L3 is provided with an evaporator 8 and a fourth junction J4. For example, the second heat exchanger 7 is an internal heat exchanger. The second junction J2 can be arranged near the outlet (i.e., the high-pressure outlet) of the first heat exchange part 71 of the second heat exchanger 7. In the flow direction of the refrigerant, the fourth junction J4 is located downstream of the second junction J2. The two 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. The two 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. Both ends of the sixth refrigerant circuit L6 are connected to the fourth valve port V4 and the fifth junction J5 of the second valve assembly 12, respectively.

[0050] The first heat exchange channel 21 of the first heat exchanger 2 is located in the coolant circuit, and the second heat exchange channel 22 of the first heat exchanger 2 is located in the refrigerant circuit. The two circuits perform heat exchange at the first heat exchanger 2. For example, the heat of the motor or battery can be recovered. 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 may also include a fan. In the flow direction of the air, the radiator 4, the evaporator-condenser 9 and the fan are arranged in sequence. For example, the wind source heat pump mode can be realized by 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 J3 .

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

[0054] The fourth refrigerant circuit L4 is further provided with a first expansion valve 14, such as 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 further provided with a second expansion valve 15 , such as a thermal expansion valve with a cut-off 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, which are represented by P1 and PT2. The sensor represented by P1 is provided at or near the outlet (i.e., the high-pressure outlet) of the first heat exchange part 71 of the second heat exchanger 7. The sensor represented by PT2 is provided on the second refrigerant circuit L2, near the other outlet (i.e., the low-pressure outlet) of the second heat exchange part 72 of the second heat exchanger 7.

[0057] It should be noted that a three-way structure may be provided at each joining point in this document, but this document is not limited thereto.

[0058] The first valve assembly 11 may have multiple operating conditions, for example, the first operating condition to the seventh operating condition, to assist in realizing multiple 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 connected, and the sixth port D6 and the seventh port D7 of the first valve assembly 11 are connected.

[0060] 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.

[0061] Under 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.

[0062] 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.

[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 connected, and the sixth port D6 and the seventh port D7 of the first valve assembly 11 are connected.

[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 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.

[0065] In the seventh 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 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 proportional adjustment 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 may 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 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.

[0068] In the second communication 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.

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

[0070] like Fig.16 As shown in FIG. 1 , the first valve assembly 11 includes five three-way valves 31 to 35, and the connection relationship between the valve ports is shown in the figure, where the black triangle represents conduction and the straight line can represent pipeline connection. It should be noted that the outermost black box only schematically represents the first valve assembly 11. The first to seventh working conditions of the first valve assembly 11 composed of the five three-way valves 31 to 35 are shown in FIG. Figures 17a to 18c shown.

[0071] like Fig.17aAs shown, under the first working condition, the valve ports 311 and 313 of the three-way valve 31 are connected, 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 ports 331 and 333 of the three-way valve 33 are connected, the valve port 332 of the three-way valve 33 is closed, the valve ports 343 and 342 of the three-way valve 34 are connected, 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 ports 351 and 353 of the three-way valve 35 are connected, 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 connected, and the sixth port D6 and the seventh port D7 are connected.

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

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

[0074] like Fig.17dAs shown, under the fourth working condition, the valve ports 311 and 312 of the three-way valve 31 are connected, the valve port 313 of the three-way valve 31 is closed, the valve ports 321 and 322 of the three-way valve 32 are connected, 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 ports 331 and 332 of the three-way valve 33 are connected, 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 ports 351 and 353 of the three-way valve 35 are connected, so that the fifth port D5 of the first valve assembly 11 is closed, the first port D1 and the second port D2 are connected, the third port D3 and the fourth port D4 are connected, and the sixth port D6 and the seventh port D7 are connected.

[0075] like Fig.18a As shown, under the fifth working condition, the valve ports 311 and 313 of the three-way valve 31 are connected, 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 ports 331 and 332 of the three-way valve 33 are connected, 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 ports 351 and 353 of the three-way valve 35 are connected, 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 connected, and the sixth port D6 and the seventh port D7 are connected.

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

[0077] like Fig.18cAs shown, under the seventh working condition, the valve ports 311 to 313 of the three-way valve 31 are all connected, the valve ports 321 to 323 of the three-way valve 32 are all connected, the valve ports 331 to 333 of the three-way valve 33 are closed, the valve ports 341 and 342 of the three-way valve 34 are connected, the valve port 343 of the three-way valve 34 is closed, the valve port 351 of the three-way valve 35 is closed, and the valve ports 352 and 353 of the three-way valve 35 are connected. 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 connected, and the second port D2 and the third port D3 are respectively connected to the sixth port D6 in a proportional adjustment manner.

[0078] This embodiment of using a plurality of three-way valves connected by pipelines to implement the first valve assembly provides more flexibility.

[0079] Refer to the following Figures 2 to 15 The various operating modes of the thermal management system are described in detail. The thermal management system of the present disclosure may also have Figures 2 to 15 More modes are shown in . Figures 2 to 15 by Figure 1 , but these modes also apply to different Figure 1 The dotted line in the figure indicates that there is no fluid flowing in the line, and the arrows on the line only schematically show the flow direction of the fluid.

[0080] like Figure 2As shown, the thermal management system is in the air conditioning rapid 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 connected state, 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 opened. The compressor 6 compresses the refrigerant into a 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 through 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 through the second junction J2, and after throttling expansion by the electronic expansion valve, flows to the second heat exchange flow channel 22 of the first heat exchanger 2 and exchanges heat with the coolant circuit there (for example, absorbing the heat of the coolant circuit), and then flows through the third junction J3 and the second heat exchange part 72 of the second heat exchanger 7 to return to the compressor 6. 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 connected in series with the fourth flow path C4. When the ambient temperature is low and the heat pump performance is poor, the high-pressure water heater 1 can be turned on to heat the coolant in the coolant circuit. In this way, the heat in the coolant 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 be used as a heat source for the heat pump to achieve rapid heating of the vehicle cabin.

[0081] like Figure 3 As shown, the thermal management system is in the air conditioning heating battery or heat preservation mode. In this mode, the first valve assembly 11 is in the second working condition, the second valve assembly 12 is in the first connected 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 turned on. The compressor 6 compresses the refrigerant into a 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 through 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 through the second junction point J2, and after throttling expansion by the electronic expansion valve, flows to the second heat exchange flow channel 22 of the first heat exchanger 2 and exchanges heat with the coolant circuit there (for example, absorbing the heat of the coolant circuit), and then flows through the third junction point J3 and the second heat exchange part 72 of the second heat exchanger 7 to return to the compressor 6. The above refrigerant circuit realizes air conditioning heating. Since the first valve assembly 11 is in the second working condition, the first flow path C1 is connected in series with the second flow path C2, and the coolant in the fourth flow path C4 is self-circulating. The high-pressure water heater 1 can be turned on to heat the coolant in the coolant circuit, thereby achieving battery heating or heat preservation. In addition, the heat provided by the high-pressure water heater 1 can also be used for cabin heating.

[0082] like Figure 4As shown, 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 state, the second valve assembly 12 is in the first connected state, and the one-way valve 13 is open, the first expansion valve 14 is open, the second expansion valve 15 is open, and the first pump 17 and the second pump 18 are turned on. The compressor 6 compresses the refrigerant into a 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 through the first valve port V1 and the second valve port V2 of the second valve assembly 12, and a part of it flows to the electronic expansion valve through the second junction point J2, and after throttling expansion by the electronic expansion valve, it flows to the second heat exchange flow channel 22 of the first heat exchanger 2 and exchanges heat with the coolant circuit there (for example, absorbing the heat of the coolant circuit), and then flows through the third junction point J3 and the second heat exchange part 72 of the second heat exchanger 7 to return to the compressor 6; a part of it flows to the fourth junction point 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 sequence, 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, and returns to the compressor 6. The refrigerant evaporates at the evaporator-condenser 9 and absorbs ambient heat, that is, the evaporator-condenser 9 acts as an evaporator in this mode. Since the first valve assembly 11 is in the third working state, the first flow path C1, the second flow path C2, and the fourth flow path C4 are connected in series. 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 the utilization of the motor waste heat.

[0083] like Figure 5 As shown, the thermal management system is in the battery heating or heat preservation mode. In this mode, the first valve assembly 11 is in the second working state, and the compressor 6 is turned off. Since the first valve assembly 11 is in the second working state, the first flow path C1 is connected in series with the second flow path C2, and the coolant in the fourth flow path C4 is self-circulating. The high-pressure water heater 1 can be turned on to heat the coolant in the coolant circuit, thereby achieving battery heating or heat preservation.

[0084] like Figure 6As shown, the thermal management system is in the heat pump heating mode. In this mode, the first valve assembly 11 can be in the second working state, the second valve assembly 12 is in the first connected 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 a 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 through the first valve port V1 and the second valve port V2 of the second valve assembly 12, and then 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 the heat to the air flowing into the vehicle cabin through the built-in condenser 10 , thereby achieving heat pump heating.

[0085] like Figure 7 As shown, the thermal management system is in the 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 connected state, and the second expansion valve 15 is open, and the first pump 17 and the second pump 18 are turned on. 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 a high-temperature and high-pressure refrigerant gas, and 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 through 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 J2, one part of which flows 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 part 72 of the second heat exchanger 7 in sequence, and returns to the compressor 6; the other part flows through the fourth junction J4, the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7 in sequence, and returns to the compressor 6. The refrigerant can absorb heat from the coolant 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 J1. At the radiator 4, the coolant can absorb ambient heat. The heat in the coolant can be transferred to the refrigerant circuit at the first heat exchange flow channel 21 of the first heat exchanger 2.

[0086] In targeting Figure 7In another case, the electronic expansion valve near the inlet of the second heat exchange flow channel 22 of the first heat exchanger 2 can be closed (that is, the first heat exchanger 2 does not work, and its first heat exchange flow channel 21 only acts as a flow channel), the one-way valve 13 can be opened, and the first expansion valve 14 can be opened. After flowing through the first heat exchange part 71 of the second heat exchanger 7, 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 sequence, 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, 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 environmental heat and thus acts 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] like Figure 8 As shown, 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 working condition, the second valve assembly 12 is in the first connected 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, and the first pump 17 and the second pump 18 are turned on. The compressor 6 compresses the refrigerant into a 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 through 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 J2, one part of which flows 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 part 72 of the second heat exchanger 7 in sequence, and returns to the compressor 6; the other part flows through the fourth junction J4, the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7 in sequence, and returns to the compressor 6. The refrigerant can absorb heat from the coolant circuit at the second heat exchange flow channel 22 of the first heat exchanger 2. Since the first valve assembly 11 is in the fifth working state, the first flow path C1, 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 coolant can absorb ambient heat. The heat in the coolant can be transferred to the refrigerant circuit at the first heat exchange flow channel 21 of the first heat exchanger 2.

[0088] exist Figure 8 and 9In the mode, 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] like Fig. 9 As shown, the thermal management system is in the heat pump dehumidification mode. In this mode, the first valve assembly 11 is in the fourth working state, the second valve assembly 12 is in the first connected state, and the one-way valve 13 is open, the first expansion valve 14 is open, the second expansion valve 15 is open, and the first pump 17 and the second pump 18 are turned on. The compressor 6 compresses the refrigerant into a 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 through 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 (that is, 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 of which flows through the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7 in sequence, 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, 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 state, 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 coolant can dissipate heat to the environment (i.e., the air), and the heat can be absorbed by the evaporator-condenser 9.

[0090] like Fig.10As shown, 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 connected state, and the one-way valve 13 is in a closed state, 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 turned on. The compressor 6 compresses the refrigerant into a 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 J5, the fourth valve port V4 and the second valve port V2 of the second valve assembly 12, and the first heat exchange part 71 of the second heat exchanger 7 in sequence. The electronic expansion valve near the inlet of the second heat exchange flow channel 22 of the first heat exchanger 2 is closed (that is, 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. After passing through the fourth junction J4, the refrigerant flows through the second expansion valve 15, the evaporator 8, the second heat exchange part 72 of the second heat exchanger 7 in sequence, and returns to the compressor 6. At the evaporator-condenser 9, the refrigerant can dissipate heat to the environment. Since the first valve assembly 11 is in the sixth working condition, the first flow path C1 is connected in series with the second flow path C2, and the third flow path C3 is connected in series with the fourth flow path C4. 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 coolant exchanges heat with the air, for example, releasing heat to the environment.

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

[0092] like Fig.12As shown, the thermal management system is in the battery cooling mode. In this mode, the first valve assembly 11 is in the sixth working condition, the second valve assembly 12 is in the second connected 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 turned on. The compressor 6 compresses the refrigerant into a 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 J5, the fourth valve port V4 and the second valve port V2 of the second valve assembly 12, and the first heat exchange part 71 of the second heat exchanger 7. The refrigerant then flows through the second junction J2, the electronic expansion valve, the second heat exchange channel 22 of the first heat exchanger 2, the third junction 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, that is, 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 heat from the coolant circuit. Since the first valve assembly 11 is in the sixth operating condition, the first flow path C1 is connected in series with the second flow path C2, and the third flow path C3 is connected in series with the fourth flow path C4. 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 coolant 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 cooled by the first heat exchanger 2.

[0093] like Fig.13 As shown, the thermal management system is in wind source battery motor cooling mode. In this mode, the first valve assembly 11 is in the fourth operating condition, and the first pump 17 and the second pump 18 are turned on, and the compressor 6 is turned off. Since the first valve assembly 11 is in the fourth operating 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 coolant exchanges heat with the air, for example, releasing heat to the environment. For example, the heat generated at the motor assembly 5 and the battery assembly 3 can be transferred to the air, realizing wind source heat dissipation. It can be said that in this mode, the cooling of the motor and the battery is achieved by the radiator 4.

[0094] Similar to Fig.13In another example not shown in the drawings, the first valve assembly 11 may have another operating condition different from the first to seventh operating conditions. In this other operating condition, the first port D1 is connected to the second port D2, the third port D3 is connected to the fourth port D4, the fifth port D5 is connected to the sixth port D6, and the seventh port D7 is closed, so that the first flow path C1, the second flow path C2, and the third flow path C3 are connected in series, and only the heat generated by the battery is transferred to the environment through the radiator 4, so that wind source battery cooling can be achieved.

[0095] like Fig.14 As shown, the thermal management system is in the motor heat dissipation mode. In this mode, the first valve assembly 11 is in the sixth operating condition, and the compressor 6 is turned off, and the electronic expansion valve near the inlet of the second heat exchange channel 22 of the first heat exchanger 2 is closed (that is, the first heat exchanger 2 is not working). Since the first valve assembly 11 is in the sixth operating condition, the third flow path C3 is connected in series with the fourth flow path C4. 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 coolant 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, thereby achieving motor heat dissipation.

[0096] like Fig.15As shown, the thermal management system is in the motor insulation-ultra-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 connected state, and the one-way valve 13 is in a closed state, the first expansion valve 14 is closed, the second expansion valve 15 is closed, and the first pump 17 is turned on. For example, the compressor 6 can be turned on, and 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 through 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 through the second junction point J2, and after throttling expansion by the electronic expansion valve, flows to the second heat exchange flow channel 22 of the first heat exchanger 2 and exchanges heat with the coolant circuit there (for example, absorbs the heat of the coolant circuit), and then flows through the third junction point J3 and the second heat exchange part 72 of the second heat exchanger 7 to return to the compressor 6. Since the first valve assembly 11 is in the seventh working condition, there is a combination of the first flow path C1 self-circulating (that is, the first flow path C1 constitutes a separate loop) and the first flow path C1 and the second flow path C2 are connected in series. In this mode, the heat provided by the high-pressure water heater 1 can be distributed proportionally to the coolant 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 an extremely low temperature environment, and the heat provided to the two can be achieved in a certain proportion. In an extremely low temperature environment, the compressor 6 is turned on and the high-pressure water heater 1 is turned on, thereby achieving extremely low temperature dual heating. The second pump 18 can be turned on, and the fifth port D5 of the first valve assembly 11 is connected to the seventh port D7, so that the coolant in the fourth flow path C4 is self-circulating, thereby achieving motor insulation.

[0097] As described above, by using the first valve assembly, the coolant circuit provided with a high-pressure water heater can be connected in series with the coolant circuit provided with the first heat exchanger or the coolant circuit provided with the motor assembly, or the three coolant circuits can be connected in series, so that an additional heat source can be provided for the coolant circuit in an extremely low temperature environment. In particular, rapid heating of the cabin in a low temperature environment can be achieved. In addition, by using the first valve assembly and the second valve assembly, a variety 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 disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of disclosure to achieve the purpose of this disclosure.

Claims

1. A thermal management system for a vehicle, characterized in that: The thermal management system comprises a coolant circuit and a refrigerant circuit, wherein 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), 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 in series with each other.

2. The thermal management system according to claim 1, characterized in that: The first valve assembly (11) has at least first to seventh ports; 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); 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) via 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, Under 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, Under 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, characterized in that: A first three-way structure is arranged 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 two ends of the first refrigerant circuit (L1) are respectively connected to an outlet of a compressor (6) and a 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 two ends of the second refrigerant circuit are respectively connected to a second valve port (V2) of the second valve assembly (12) and an inlet of the compressor (6), and the second refrigerant circuit is provided with a second junction point (J2), a third junction point (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 two ends of the third refrigerant circuit (L3) are respectively connected to the second junction (J2) and an 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 two 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 two 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, characterized in that: 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: 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 (J3).

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