An electric vehicle thermal management system and an electric vehicle

Abstract

The application discloses an electric vehicle thermal management system and an electric vehicle. The electric vehicle thermal management system comprises a controller, a water bottle for storing liquid, a compressor, a low-temperature plate heat exchanger connected with the compressor, and a high-temperature plate heat exchanger connected with the compressor. The low-temperature plate heat exchanger and the high-temperature plate heat exchanger are connected through an electronic expansion valve. The low-temperature plate heat exchanger and the high-temperature plate heat exchanger are connected with a battery and an air conditioner box through an eleven-way valve respectively. The low-temperature plate heat exchanger is connected with a first interface and a second interface of the eleven-way valve, the high-temperature plate heat exchanger is connected with a tenth interface and an eleventh interface of the eleven-way valve, the air conditioner box is connected with a fourth interface, a fifth interface and a sixth interface of the eleven-way valve, and the battery is connected with a third interface and a fourth interface of the eleven-way valve. The eleven-way valve is used to replace a cooling liquid circuit in the prior art, so that the cooling system is more simple.

Description

Technical Field

[0001] This invention relates to the field of thermal management, and more particularly to a thermal management system for electric vehicles and an electric vehicle. Background Technology

[0002] The current technological development of vehicle thermal management systems has evolved from simple distributed three-electric thermal management to integrated three-electric thermal management, resulting in various systems that couple the heat between the three electric systems. In order to make full use of the vehicle's electrical energy, most of them use multi-port valves to couple the heat between the three electric systems through the coolant, while maximizing the energy efficiency of the refrigerant circuit. This will result in a large number of refrigerant circuit valves, a complex coolant circuit, and higher costs. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention provides an electric vehicle thermal management system and an electric vehicle that can provide a simple coolant circuit.

[0004] In a first aspect, the present invention provides a thermal management system for an electric vehicle, comprising: a controller, a reservoir for storing liquid, a compressor, and a low-temperature plate heat exchanger and a high-temperature plate heat exchanger connected to the compressor, wherein the low-temperature plate heat exchanger and the high-temperature plate heat exchanger are connected via an electronic expansion valve; the low-temperature plate heat exchanger and the high-temperature plate heat exchanger are respectively connected to a battery and an air conditioning unit via an eleven-way valve.

[0005] The low-temperature plate heat exchanger is connected to the first and second ports of the eleven-way valve, the high-temperature plate heat exchanger is connected to the tenth and eleventh ports of the eleven-way valve, the air conditioning unit is connected to the fourth, fifth, and sixth ports of the eleven-way valve, and the battery is connected to the third and fourth ports of the eleven-way valve. The controller controls the connection status of the first, second, third, fourth, fifth, sixth, tenth, and eleventh ports inside the eleven-way valve to achieve different thermal management modes.

[0006] In one optional embodiment, the controller connects the first and second ports of the eleven-way valve with the third and fourth ports to form a first loop, or the controller connects the tenth and eleventh ports of the eleven-way valve with the third and fourth ports to form a second loop. The first loop and the second loop are used to execute different thermal management modes.

[0007] In one optional embodiment, the battery is connected to the third port of the eleven-way valve via the first port of the three-way valve; the second port of the three-way valve is connected to the air conditioning unit, and the third port of the three-way valve is connected to the battery.

[0008] In an optional embodiment, a PTC module is further provided between the three-way valve and the third interface.

[0009] In one optional embodiment, the air conditioning unit includes a first heat exchanger and a second heat exchanger. The first heat exchanger is connected to the second port, and the second heat exchanger is connected to the fifth port of the eleven-way valve. The first heat exchanger and the second heat exchanger can be connected in series through the fourth and fifth ports of the eleven-way valve.

[0010] In one optional embodiment, the third port is connected to the fourth port through a first node, a second node, and a third node. The first node is directly connected to the input terminal of the battery, the second node is connected to the output terminal of the battery, and the third node is connected to the first heat exchanger through a one-way valve.

[0011] In one optional embodiment, the electric vehicle thermal management system further includes an electric drive and control module and a front heat exchanger. The electric drive and control module is connected to the seventh port of the eleven-way valve, and the front heat exchanger is connected to the eighth and ninth ports of the eleven-way valve. The electric drive and control module and the front heat exchanger are also connected through a fourth node.

[0012] In an alternative embodiment, a third coolant pump is provided between the battery and the second node.

[0013] In one alternative embodiment, the low-temperature plate heat exchanger is connected to a first coolant pump, and the high-temperature plate heat exchanger is connected to a second coolant pump.

[0014] A second aspect of the present invention provides an electric vehicle including the electric vehicle thermal management system described in the first aspect of the present invention.

[0015] This invention uses an eleven-way valve to replace the coolant circuit in the prior art, making the cooling system simpler; by controlling the internal passage of the eleven-way valve to connect multiple ports, better heat exchange can be achieved; at the same time, the number of heat exchangers used can be reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a module of an electric vehicle thermal management system according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the coolant circuit in the passenger cabin cooling mode.

[0019] Figure 3 This is a schematic diagram of the coolant circuit in battery cooling mode.

[0020] Figure 4 This is a schematic diagram of the coolant circuit for passenger cabin cooling and battery cooling.

[0021] Figure 5 This is a schematic diagram of the coolant circuit for passenger cabin cooling (multi-temperature zone) or cooling and dehumidification.

[0022] Figure 6 This is a schematic diagram of the coolant circuit for passenger cabin cooling or dehumidification and battery cooling.

[0023] Figure 7 This is a schematic diagram of the coolant circuit for heating and dehumidifying the passenger cabin.

[0024] Figure 8 This is a schematic diagram of the coolant circuit for heating the passenger compartment.

[0025] Figure 9 This is a schematic diagram of the coolant circuit for heating the passenger compartment and the battery.

[0026] Figure 10 This is a schematic diagram of the coolant circuit for heating the battery via thermal storage or electric drive and electronic control modules.

[0027] Figure 11 This is a schematic diagram of the coolant circuit for air-cooled low-temperature batteries or passenger cabin heating and battery cooling.

[0028] Figure 12 This is a schematic diagram of another electric vehicle thermal management system in an embodiment of the present invention.

[0029] Figure 13 This is a schematic diagram of another electric vehicle thermal management system in an embodiment of the present invention.

[0030] Low-temperature plate heat exchanger 1; High-temperature plate heat exchanger 2; Electric drive and control module 3; Head heat exchanger 4; Three-way valve 5; First port 51; Second port 52; Third port 53; First coolant pump 6; Second coolant pump 7; Third coolant pump 8; Check valve 9; First node 10; Second node 11; Third node 12; Fourth node 13; Compressor 14; First heat exchanger AR1; Second heat exchanger AR2; Liquid storage and drying tank RD. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be understood that the terms "first," "second," and "third," etc., in the claims, specification, and drawings of this invention are used to distinguish different objects, rather than to describe a specific order. The terms "comprising" and "including" used in the specification and claims of this invention indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0033] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0034] Please see Figure 1 This invention provides a thermal management system for an electric vehicle, comprising: a controller, a reservoir for storing coolant, a compressor 14, and a low-temperature plate heat exchanger 1 and a high-temperature plate heat exchanger 2 connected to the compressor 14. The reservoir stores coolant, which is a combustible gas. For example, using R290 as a combustible refrigerant, in conventional thermal management systems, the evaporator in the air conditioning unit is located in the passenger compartment. The presence of R290 combustible gas in the passenger compartment would hinder customers' choice of combustible refrigerant.

[0035] The low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are connected by an electronic expansion valve; the electronic expansion valve is in Figure 1 The system employs two parallel, interconnected expansion valves, EXV1 and EXV2. In some embodiments, expansion valve EXV1 can be omitted to further simplify the thermal management system. Expansion valve EXV1 is connected to the high-temperature plate heat exchanger 2 via a liquid storage drying tank RD. The low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are connected to the battery and the air conditioning unit, respectively, via 11-way valves.

[0036] The low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are devices capable of heat exchange, and coolant can flow bidirectionally inside them. Those skilled in the art can... Figure 1 The coolant passage is shown below and will not be described in detail again.

[0037] like Figure 1As shown, the low-temperature plate heat exchanger 1 is connected to the first and second ports of the eleven-way valve. The high-temperature plate heat exchanger 2 is connected to the tenth and eleventh ports of the eleven-way valve. The low-temperature plate heat exchanger 1 is connected to a first coolant pump 6, and the high-temperature plate heat exchanger 2 is connected to a second coolant pump 7. The first coolant pump 6 is located between the low-temperature plate heat exchanger 1 and the first port, and the second coolant pump 7 is located between the high-temperature plate heat exchanger 2 and the eleventh port.

[0038] Furthermore, the air conditioning unit is connected to the fourth, fifth, and sixth ports of the eleven-way valve. In this invention, the air conditioning unit includes a first heat exchanger AR1 and a second heat exchanger AR2.

[0039] The second heat exchanger AR2 is connected to the fifth and sixth interfaces; the first heat exchanger AR1 is connected to the fourth interface.

[0040] The battery is connected to the third and fourth ports of the eleven-way valve. Specifically, the battery is connected to the eleven-way valve via a three-way valve 5. The three-way valve 5 includes three connection ports. The first port 51 of the three-way valve 5 is connected to the third port of the eleven-way valve, the second port 52 of the three-way valve 5 is connected to the first heat exchanger AR1 of the air conditioning unit, and the third port 53 of the three-way valve 5 is connected to the battery.

[0041] Furthermore, the third port 53 is also connected to the fourth port of the eleven-way valve, wherein the connection path between the third port 53 and the fourth port is provided with three connection nodes.

[0042] In some embodiments, the third interface 53 is connected to the fourth interface via a first node 10, a second node 11, and a third node 12, with the first node 10, second node 11, and third node 12 connected sequentially. The first node 10 is directly connected to the input terminal of the battery, and the second node 11 is connected to the output terminal of the battery. A third coolant pump 8 is provided between the battery and the second node 11. The third node 12 is connected to the first heat exchanger AR1 via a one-way valve 9.

[0043] Therefore, the first heat exchanger AR1 is connected to the second port 52, and the second heat exchanger AR2 is connected to the fifth port of the eleven-way valve. The first heat exchanger AR1 and the second heat exchanger AR2 can be connected in series through the fourth and fifth ports of the eleven-way valve for cooling.

[0044] Based on the above connection paths, the controller controls the connection status of the first, second, third, fourth, fifth, sixth, tenth, and eleventh ports inside the eleven-way valve to achieve different thermal management modes.

[0045] In one embodiment, the controller connects the first and second ports of the eleven-way valve with the third and fourth ports to form a first loop, or the controller connects the tenth and eleventh ports of the eleven-way valve with the third and fourth ports to form a second loop. The first and second loops are used to execute different thermal management modes, specifically including cooling, heating, and dehumidification modes.

[0046] In some embodiments, the electric vehicle thermal management system further includes an electric drive and control module 3 and a front heat exchanger 4. The electric drive and control module 3 is connected to the seventh interface of the eleven-way valve, and the front heat exchanger 4 is connected to the eighth and ninth interfaces of the eleven-way valve. The electric drive and control module 3 and the front heat exchanger 4 are also connected through a fourth node 13.

[0047] Please see Figure 2 , Figure 2 This is a schematic diagram of the coolant circuit in passenger cabin cooling mode. In this embodiment, the second interface, the third interface, the first port 51 and the second port 52 of the three-way valve 5 are connected to the first heat exchanger AR1 of the air conditioning unit. The fourth interface is connected to the fifth interface, the sixth interface is connected to the first interface, the ninth interface is connected to the tenth interface, and the seventh interface is connected to the eleventh interface. In this embodiment, the controller controls the first port 51 and the second port 52 of the three-way valve 5 to connect, allowing coolant to flow to the first heat exchanger AR1 and the second heat exchanger AR2 of the air conditioning unit to perform passenger cabin cooling.

[0048] Please see Figure 3 , Figure 3 This is a schematic diagram of the coolant circuit in battery cooling mode. In this embodiment, the second interface, the third interface, the first port 51 and the third port 53 of the three-way valve 5 are connected to the battery. The fourth interface is connected to the fifth interface, the sixth interface is connected to the first interface, the ninth interface is connected to the tenth interface, and the seventh interface is connected to the eleventh interface. In this embodiment, the controller controls the first port 51 and the third port 53 of the three-way valve 5 to connect, allowing coolant to flow to the battery for battery cooling; simultaneously, the coolant also flows to the second heat exchanger AR2 of the air conditioning unit.

[0049] Please see Figure 4 , Figure 4This is a schematic diagram of the coolant circuit for passenger cabin cooling and battery cooling. In this embodiment, the second interface and the third interface are connected and connected to the battery through the first port 51 and the third port 53 of the three-way valve 5, and connected to the air conditioning unit through the first port 51 and the second port 52 of the three-way valve 5. The fourth interface is connected to the fifth interface, the sixth interface is connected to the first interface, the ninth interface is connected to the tenth interface, and the seventh interface is connected to the eleventh interface. In this embodiment, the controller controls the first port 51 of the three-way valve 5 to connect to the second port 52 and the third port 53 respectively, so that the coolant flows to the first heat exchanger AR1 and the second heat exchanger AR2 of the battery and the air conditioning unit to perform battery and passenger cabin cooling.

[0050] Please see Figure 5 , Figure 5 This is a schematic diagram of the coolant circuit for passenger cabin cooling (multi-temperature zone) or cooling and dehumidification. In this embodiment, the second interface and the third interface are connected and connected to the first heat exchanger AR1 of the air conditioning unit through the first port 51 and the second port 52 of the three-way valve 5. The first heat exchanger AR1 is connected to the first interface through the fourth interface. The tenth interface is connected to the ninth interface, and the seventh interface is connected to the sixth interface. After the coolant flows to the second heat exchanger AR2, it flows to the eleventh interface through the fifth interface. In this embodiment, the low-temperature coolant flows through the first heat exchanger AR1 of the air conditioning unit to cool the passenger cabin. The second heat exchanger AR2 of the air conditioning unit provides heat as a heat source to heat the air for dual-temperature zone air heating or air heating in dehumidification mode.

[0051] Please see Figure 6 , Figure 6 This is a schematic diagram of the coolant circuit for passenger cabin cooling or dehumidification and battery cooling. In this embodiment, the second and third interfaces are connected and connected to the first heat exchanger AR1 of the air conditioning unit via the first and second ports 51 and 52 of the three-way valve 5, and to the battery via the first and third ports 53 of the three-way valve 5. The coolant then flows to the fourth interface, which is connected to the first interface. The tenth interface is connected to the ninth interface, and the seventh interface is connected to the sixth interface. After flowing to the second heat exchanger AR2, the coolant flows to the eleventh interface via the fifth interface. In this embodiment, the low-temperature coolant flows through the first heat exchanger AR1 of the air conditioning unit and the battery for cooling. The second heat exchanger AR2 of the air conditioning unit provides heat as a heat source to heat the air for dual-temperature zone air heating or dehumidification mode air heating.

[0052] Please see Figure 7 , Figure 7This is a schematic diagram of the coolant circuit for heating and dehumidifying the passenger compartment. In this embodiment, the second and third interfaces are connected and connected to the first heat exchanger AR1 of the air conditioning unit through the first port 51 and the second port 52 of the three-way valve 5. Then, it is connected to the seventh interface through the fourth interface. After flowing through the electric drive and control module 3 and the head heat exchanger 4, the coolant flows to the first interface through the ninth interface. The tenth interface is connected to the sixth interface, and the coolant flows to the second heat exchanger AR2 and then flows to the eleventh interface through the fifth interface. In this embodiment, the coolant of the low-temperature plate heat exchanger 1 flows through the first heat exchanger AR1 of the air conditioning unit, and the coolant of the high-temperature plate heat exchanger 2 flows through the second heat exchanger AR2 of the air conditioning unit. The air in the air conditioning unit is first cooled by the first heat exchanger AR1 and then heated by the second heat exchanger AR2, reducing the relative humidity of the outlet air and performing heating and dehumidification.

[0053] Please see Figure 8 , Figure 8 This is a schematic diagram of the coolant circuit for passenger compartment heating. In this embodiment, the second interface is connected to the ninth interface, which in turn is connected to the eighth interface. After the coolant flows to the electric drive and control module 3 and the head heat exchanger 4, it connects to the first interface through the seventh interface. The tenth interface is connected to the third interface and is connected to the first heat exchanger AR1 through the first port 51 and the second port 52 of the three-way valve 5. The coolant flows to the eleventh interface through the fourth interface. In this embodiment, the coolant of the low-temperature plate heat exchanger 1 flows through the electric drive and control module 3 and the head heat exchanger 4 for waste heat recovery, while the coolant of the high-temperature plate heat exchanger 2 flows through the first heat exchanger AR1 of the air conditioning unit for heating.

[0054] Please see Figure 9 , Figure 9 This is a schematic diagram of the coolant circuit for heating the passenger compartment and battery. In this embodiment, the second interface is connected to the ninth interface, which in turn is connected to the eighth interface. After the coolant flows to the electric drive and control module 3 and the front heat exchanger 4, it connects to the first interface through the seventh interface. Furthermore, the tenth interface is connected to the third interface and, through the three-way valve 5, connects to the first heat exchanger AR1 and the battery, and through the fourth interface to the eleventh interface. In this embodiment, the coolant from the low-temperature plate heat exchanger 1 flows through the electric drive and control module 3 and the front heat exchanger 4 for waste heat recovery, while the coolant from the high-temperature plate heat exchanger 2 flows through the first heat exchanger AR1 in the air conditioning unit and the battery for heating.

[0055] Please see Figure 10 , Figure 10This is a schematic diagram of the coolant circuit for heating the battery via the heat storage or electric drive and electronic control module 3. In this embodiment, the second interface is connected to the third interface, and is connected to the battery through the first port 51 and the third port 53 of the three-way valve 5. Then, it is connected to the seventh interface through the fourth interface. The coolant flows through the electric drive and electronic control module 3 and the vehicle front heat exchanger 4, and then flows through the seventh interface to the eighth interface, which is connected to the first interface. The tenth interface is connected to the sixth interface, and the coolant flows through the second heat exchanger AR2 and then flows through the fifth interface to the eleventh interface. In this embodiment, the coolant in the low-temperature plate heat exchanger 1 flows through the electric drive and electronic control module 3 for waste heat recovery, which is used to heat the battery.

[0056] Please see Figure 11 , Figure 11 This is a schematic diagram of the coolant circuit for low-temperature battery air cooling or passenger compartment heating and battery cooling. In this embodiment, the second and third interfaces are connected, and the coolant is connected to the battery through the first port 51 and the third port 53 of the three-way valve 5. It then connects to the seventh interface through the fourth interface. The coolant flows through the electric drive and control module 3 and the vehicle front heat exchanger 4, and then flows to the first interface through the ninth interface. The tenth interface is connected to the sixth interface, and the coolant flows to the second heat exchanger AR2 and then to the eleventh interface through the fifth interface. In this embodiment, the coolant from the low-temperature plate heat exchanger 1 flows through the battery to cool it, then cools the electric drive and control module 3, and finally dissipates the heat to the environment through the vehicle front heat exchanger 4. The coolant from the high-temperature plate heat exchanger 2 flows through the second heat exchanger AR2 to heat the passenger compartment.

[0057] Furthermore, in some embodiments, such as Figure 12 As shown, in Figure 1 In addition to the above, a PTC module is also provided between the three-way valve 5 and the third interface. Adding a PTC module can improve the system's low-temperature robustness.

[0058] In some embodiments, such as Figure 13 As shown, in Figure 1 Based on this, the electronic expansion valve EXV1 has been simplified, reducing hardware costs. By absorbing heat through the low-temperature plate heat exchanger 1, the heat circuit of the compressor 14 can be eliminated.

[0059] As can be seen from the above, the present invention uses an eleven-way valve to replace the coolant circuit in the prior art, making the cooling system simpler; by controlling the internal passage of the eleven-way valve to connect multiple connection ports, better heat exchange can be achieved; at the same time, the number of heat exchangers used can be reduced.

[0060] The present invention also provides an electric vehicle, including the electric vehicle thermal management system described above. The electric vehicle thermal management system includes: a controller, a reservoir for storing liquid, a compressor 14, and a low-temperature plate heat exchanger 1 and a high-temperature plate heat exchanger 2 connected to the compressor 14. The low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are connected via an electronic expansion valve; the low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are respectively connected to a battery and an air conditioning unit via an eleven-way valve.

[0061] The low-temperature plate heat exchanger 1 is connected to the first and second ports of the eleven-way valve, the high-temperature plate heat exchanger 2 is connected to the tenth and eleventh ports of the eleven-way valve, the air conditioning unit is connected to the fourth, fifth, and sixth ports of the eleven-way valve, and the battery is connected to the third and fourth ports of the eleven-way valve. The controller controls the connection status of the first, second, third, fourth, fifth, sixth, tenth, and eleventh ports inside the eleven-way valve to achieve different thermal management modes.

[0062] Furthermore, the controller connects the first and second ports of the eleven-way valve with the third and fourth ports to form a first loop, or the controller connects the tenth and eleventh ports of the eleven-way valve with the third and fourth ports to form a second loop. The first loop and the second loop are used to execute different thermal management modes.

[0063] Furthermore, the battery is connected to the third port of the eleven-way valve via the first port 51 of the three-way valve 5; the second port 52 of the three-way valve 5 is connected to the air conditioning unit, and the third port 53 of the three-way valve 5 is connected to the battery. A PTC module is also provided between the three-way valve 5 and the third port.

[0064] Furthermore, the air conditioning unit includes a first heat exchanger AR1 and a second heat exchanger AR2. The first heat exchanger AR1 is connected to the second port 52, and the second heat exchanger AR2 is connected to the fifth port of the eleven-way valve. The first heat exchanger AR1 and the second heat exchanger AR2 can be connected in series through the fourth and fifth ports of the eleven-way valve.

[0065] Furthermore, the third interface 53 is connected to the fourth interface through the first node 10, the second node 11, and the third node 12. The first node 10 is directly connected to the input terminal of the battery, the second node 11 is connected to the output terminal of the battery, and the third node 12 is connected to the first heat exchanger AR1 through a one-way valve 9.

[0066] Furthermore, the low-temperature plate heat exchanger 1 is connected to a first coolant pump 6, and the high-temperature plate heat exchanger 2 is connected to a second coolant pump 7. A third coolant pump 8 is provided between the battery and the second node 11.

[0067] Furthermore, the electric vehicle thermal management system also includes an electric drive and control module 3 and a front heat exchanger 4. The electric drive and control module 3 is connected to the seventh interface of the eleven-way valve, and the front heat exchanger 4 is connected to the eighth and ninth interfaces of the eleven-way valve. The electric drive and control module 3 and the front heat exchanger 4 are also connected through a fourth node 13.

[0068] This document has generally described the systems and methods in detail to aid in understanding the invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention can be practiced without one or more specific details, or using other means, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric vehicle thermal management system, characterized by, include: The system includes a controller, a reservoir for storing liquid, an electric drive and control module, a head heat exchanger, a compressor, and a low-temperature plate heat exchanger and a high-temperature plate heat exchanger connected to the compressor. The low-temperature plate heat exchanger and the high-temperature plate heat exchanger are connected via an electronic expansion valve. The low-temperature plate heat exchanger and the high-temperature plate heat exchanger are connected to the battery and the air conditioning unit respectively via an eleven-way valve. The low-temperature plate heat exchanger is connected to the first and second ports of the eleven-way valve, the high-temperature plate heat exchanger is connected to the tenth and eleventh ports of the eleven-way valve, the air conditioning unit is connected to the fourth, fifth, and sixth ports of the eleven-way valve, and the battery is connected to the third and fourth ports of the eleven-way valve. The controller controls the connection status of the first, second, third, fourth, fifth, sixth, tenth, and eleventh ports inside the eleven-way valve to achieve different thermal management modes. The battery is connected to the third port of the eleven-way valve via the first port of the three-way valve; the second port of the three-way valve is connected to the air conditioning unit, and the third port of the three-way valve is connected to the battery. The air conditioning unit includes a first heat exchanger and a second heat exchanger. The first heat exchanger is connected to the second port, and the second heat exchanger is connected to the fifth port of the eleven-way valve. The first heat exchanger and the second heat exchanger can be connected in series through the fourth port and the fifth port of the eleven-way valve. The electric drive and control module is connected to the seventh port of the eleven-way valve, and the vehicle head heat exchanger is connected to the eighth and ninth ports of the eleven-way valve.

2. The electric vehicle thermal management system of claim 1, wherein, The controller forms a first loop by controlling the first and second ports of the eleven-way valve to connect with the third and fourth ports, or the controller forms a second loop by controlling the tenth and eleventh ports of the eleven-way valve to connect with the third and fourth ports. The first loop and the second loop are used to execute different thermal management modes.

3. The electric vehicle thermal management system of claim 1, wherein, A PTC module is also provided between the three-way valve and the third interface.

4. The electric vehicle thermal management system of claim 1, wherein, The third port is connected to the fourth port through the first node, the second node, and the third node. The first node is directly connected to the input terminal of the battery, the second node is connected to the output terminal of the battery, and the third node is connected to the first heat exchanger through a one-way valve.

5. The electric vehicle thermal management system of claim 4, wherein, The electric drive and control module and the head heat exchanger are connected through a fourth node.

6. The electric vehicle thermal management system of claim 4, wherein, A third coolant pump is provided between the battery and the second node.

7. The electric vehicle thermal management system of claim 1, wherein, The low-temperature plate heat exchanger is connected to a first coolant pump, and the high-temperature plate heat exchanger is connected to a second coolant pump.

8. An electric vehicle, characterized by The electric vehicle thermal management system includes any one of claims 1 to 7.

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