Electric vehicle thermal management system and electric vehicle

Abstract

The invention discloses an electric vehicle thermal management system and an electric vehicle. The electric vehicle thermal management system comprises a controller, a kettle used for storing liquid, a compressor, a low-temperature plate heat exchanger and a high-temperature plate heat exchanger, and the low-temperature plate heat exchanger and the high-temperature plate heat exchanger are connected with the compressor and connected through an electronic expansion valve; and the low-temperature plate heat exchanger and the high-temperature plate heat exchanger are respectively connected with a battery and an air conditioning cabinet through an eleven-way valve. Wherein the low-temperature plate heat exchanger is connected with a first connector and a second connector of the eleven-way valve, the high-temperature plate heat exchanger is connected with a tenth connector and an eleventh connector of the eleven-way valve, and the air conditioner box is connected with a fourth connector, a fifth connector and a sixth connector of the eleven-way valve. And the battery is connected with the third interface and the fourth interface of the eleven-way valve. A cooling liquid loop in the prior art is replaced by the eleven-way valve, so that the cooling system is simpler.

Description

Technical Field

[0001] The present invention relates to the field of thermal management, and in particular to an electric vehicle thermal management system and an electric vehicle. Background Art

[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, and has developed a variety of three-electric thermal coupling systems. In order to make full use of the vehicle's electrical energy, most of them use multi-way valves to couple the heat of the three-electric system 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 a high cost. Summary of the invention

[0003] In view of the above technical problems, the present invention provides an electric vehicle thermal management system and an electric vehicle, which can provide a simple coolant circuit.

[0004] In a first aspect of the present invention, a thermal management system for an electric vehicle is provided, comprising: a controller, a kettle 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 box via an eleven-way valve; Among them, the low-temperature plate heat exchanger is connected to the first interface and the second interface of the eleven-way valve, the high-temperature plate heat exchanger is connected to the tenth interface and the eleventh interface of the eleven-way valve, the air-conditioning box is connected to the fourth interface, the fifth interface and the sixth interface of the eleven-way valve, and the battery is connected to the third interface and the fourth interface of the eleven-way valve; the controller controls the connection status of the first interface, the second interface, the third interface, the fourth interface, the fifth interface, the sixth interface, the tenth interface and the eleventh interface inside the eleven-way valve to realize different thermal management modes.

[0005] In an optional embodiment, the controller forms a first circuit by controlling the first interface and the second interface of the eleven-way valve to be connected with the third interface and the fourth interface, or the controller forms a second circuit by controlling the tenth interface and the eleventh interface of the eleven-way valve to be connected with the third interface and the fourth interface, and the first circuit and the second circuit are used to execute different thermal management modes.

[0006] In an optional embodiment, the battery is connected to the third interface of the eleven-way valve through the first interface of the three-way valve; the second interface of the three-way valve is connected to the air-conditioning box, and the third interface of the three-way valve is connected to the battery.

[0007] In an optional implementation, a PTC module is further provided between the three-way valve and the third interface.

[0008] In an optional embodiment, the air-conditioning box includes a first heat exchanger and a second heat exchanger, the first heat exchanger is connected to the second interface, the second heat exchanger is connected to the fifth interface of the eleven-way valve, and the first heat exchanger and the second heat exchanger can be connected in series through the fourth interface and the fifth interface of the eleven-way valve.

[0009] In an optional embodiment, the third connection interface is connected to the fourth interface through a first node, a second node, and a third node, the first node is directly connected to the input end of the battery, the second node is connected to the output end of the battery, and the third node is connected to the first heat exchanger through a one-way valve.

[0010] In an optional embodiment, the electric vehicle thermal management system also includes an electric drive and electric control module, and a front heat exchanger. The electric drive and electric control module are connected to the seventh interface of the eleven-way valve, and the front heat exchanger is connected to the eighth interface and the ninth interface of the eleven-way valve. The electric drive and electric control module and the front heat exchanger are connected through the fourth node.

[0011] In an optional implementation, a third coolant pump is provided between the battery and the second node.

[0012] In an optional implementation, 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.

[0013] A second aspect of the present invention provides an electric vehicle, comprising the electric vehicle thermal management system described in the first aspect of the present invention.

[0014] 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; and at the same time, the number of heat exchangers used can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 Schematic diagram of a module of a thermal management system for an electric vehicle in an embodiment of the present invention.

[0017] Figure 2 is a schematic diagram of the coolant circuit for passenger compartment cooling mode.

[0018] Figure 3 This is a schematic diagram of the coolant circuit for the battery cooling mode.

[0019] Figure 4 It is a schematic diagram of the coolant circuit for passenger compartment cooling and battery cooling.

[0020] Figure 5 It is a schematic diagram of the coolant circuit for passenger compartment cooling (multi-temperature zone) or cooling and dehumidification.

[0021] Figure 6 Schematic diagram of the coolant circuit for passenger compartment cooling or cooling and dehumidification and battery cooling.

[0022] Figure 7 It is a schematic diagram of the coolant circuit for heating and dehumidifying the passenger compartment.

[0023] Figure 8 Schematic diagram of the coolant circuit for passenger compartment heating.

[0024] Fig. 9 Schematic diagram of the coolant circuit for heating the passenger compartment and the battery.

[0025] Fig.10 It is a schematic diagram of the coolant circuit for heat storage or electric drive and electronic control module heating battery.

[0026] Fig.11 It is a schematic diagram of the coolant circuit for low-temperature battery air cooling or passenger compartment heating and battery cooling.

[0027] Fig.12 Schematic diagram of another module of a thermal management system for an electric vehicle according to an embodiment of the present invention.

[0028] Fig.13 Schematic diagram of another module of a thermal management system for an electric vehicle according to an embodiment of the present invention.

[0029] Low-temperature plate heat exchanger 1; high-temperature plate heat exchanger 2; electric drive and electronic control module 3; front heat exchanger 4; three-way valve 5; first through interface 51; second through interface 52; third through interface 53; first coolant pump 6; second coolant pump 7; third coolant pump 8; one-way 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 drying tank RD. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0031] It should be understood that the terms "first", "second", "third", etc. in the claims, specifications and drawings of the present invention are used to distinguish different objects rather than to describe a specific order. The terms "include" and "comprise" used in the specification and claims of the present invention indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0032] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] See also Figure 1 The present invention provides an electric vehicle thermal management system, comprising: a controller, a kettle 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 kettle is used to store coolant, and the coolant is a flammable gas. For example, R290 is a flammable refrigerant, and the evaporator in the air-conditioning box of a traditional thermal management system is arranged in the passenger compartment. The entry of R290 flammable gas into the passenger compartment will hinder customers from choosing flammable refrigerants.

[0034] The low temperature plate heat exchanger 1 is connected to the high temperature plate heat exchanger 2 via an electronic expansion valve; Figure 1 Two expansion valves EXV1 and EXV2 are used in parallel. In some embodiments, the expansion valve EXV1 can be eliminated to further simplify the thermal management system. The expansion valve EXV1 is connected to the high-temperature plate heat exchanger 2 through the liquid storage drying tank RD. The low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are respectively connected to the battery and the air conditioning box through an eleven-way valve.

[0035] 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 therein. Figure 1 The coolant passage is shown as an understanding and will not be elaborated on here.

[0036] like Figure 1As shown, the low temperature plate heat exchanger 1 is connected to the first interface and the second interface of the eleven-way valve. The high temperature plate heat exchanger 2 is connected to the tenth interface and the eleventh interface 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 arranged between the low temperature plate heat exchanger 1 and the first interface, and the second coolant pump 7 is arranged between the high temperature plate heat exchanger 2 and the eleventh interface.

[0037] Furthermore, the air conditioning box is connected to the fourth interface, the fifth interface and the sixth interface of the eleven-way valve. In the present invention, the air conditioning box includes a first heat exchanger AR1 and a second heat exchanger AR2.

[0038] The second heat exchanger AR2 is in communication with the fifth interface and the sixth interface; the first heat exchanger AR1 is in communication with the fourth interface.

[0039] The battery is connected to the third interface and the fourth interface of the eleven-way valve. Specifically, the battery is connected to the eleven-way valve through the three-way valve 5. The three-way valve 5 includes three communication interfaces. The first communication interface 51 of the three-way valve 5 is connected to the third interface of the eleven-way valve, the second communication interface 52 of the three-way valve 5 is connected to the first heat exchanger AR1 of the air conditioner, and the third communication interface 53 of the three-way valve 5 is connected to the battery.

[0040] Furthermore, the third port 53 is also communicated with the fourth port of the eleven-port valve, wherein three connection nodes are further arranged on the connection passage between the third port 53 and the fourth port.

[0041] In some embodiments, the third communication interface 53 is connected to the fourth interface through the first node 10, the second node 11, and the third node 12, and the first node 10, the second node 11, and the third node 12 are connected in sequence. The first node 10 is directly connected to the input end of the battery, and the second node 11 is connected to the output end 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 through a one-way valve 9.

[0042] 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 port and the fifth port of the eleven-way valve to facilitate cooling.

[0043] According to the above connection paths, the controller controls the connection states of the first interface, the second interface, the third interface, the fourth interface, the fifth interface, the sixth interface, the tenth interface, and the eleventh interface inside the eleven-way valve to achieve different thermal management modes.

[0044] As an embodiment, the controller controls the first interface and the second interface of the eleven-way valve to communicate with the third interface and the fourth interface to form a first loop, or the controller controls the tenth interface and the eleventh interface of the eleven-way valve to communicate with the third interface and the fourth interface to form a second loop. The first loop and the second loop are used to execute different thermal management modes, including cooling, heating, and dehumidification modes.

[0045] In some embodiments, the electric vehicle thermal management system further includes an electric drive and electric control module 3 and a front heat exchanger 4. The electric drive and electric 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 interface of the eleven-way valve and the ninth interface of the eleven-way valve. The electric drive and electric control module 3 and the front heat exchanger 4 are connected through the fourth node 13.

[0046] See also Figure 2 , Figure 2 Schematic diagram of the coolant circuit in the passenger compartment cooling mode. In this embodiment, the second interface, the third interface, the first interface 51 and the second interface 52 of the three-way valve 5 are connected to the first heat exchanger AR1 of the air conditioning box, the fourth interface is connected to the fifth interface, and 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 interface 51 and the second interface 52 of the three-way valve 5 to be connected, and the coolant flows to the first heat exchanger AR1 and the second heat exchanger AR2 of the air conditioning box to perform passenger compartment cooling.

[0047] See also Figure 3 , Figure 3 Schematic diagram of the coolant circuit in the battery cooling mode. In this embodiment, the second interface, the third interface, the first interface 51 and the third interface 53 of the three-way valve 5 are connected to the battery, the fourth interface is connected to the fifth interface, and 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 interface 51 and the third interface 53 of the three-way valve 5 to be connected, and the coolant flows to the battery to perform battery cooling; at the same time, the coolant also flows to the second heat exchanger AR2 of the air conditioning box.

[0048] See also Figure 4 , Figure 4Schematic diagram of the coolant circuit for passenger compartment cooling and battery cooling. In this embodiment, the second interface and the third interface are connected, and are connected to the battery through the first interface 51 and the third interface 53 of the three-way valve 5, and are connected to the air conditioning box through the first interface 51 and the second interface 52 of the three-way valve 5. The fourth interface is connected to the fifth interface, and 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 interface 51 of the three-way valve 5 to be connected to the second interface 52 and the third interface 53 respectively, and the coolant flows to the first heat exchanger AR1 and the second heat exchanger AR2 of the battery and the air conditioning box to perform battery and passenger compartment cooling.

[0049] See also Figure 5 , Figure 5 It is a schematic diagram of the coolant circuit for passenger compartment cooling (multi-temperature zones) or cooling and dehumidification. In this embodiment, the second interface and the third interface are connected, and are connected to the first heat exchanger AR1 of the air conditioning box through the first interface 51 and the second interface 52 of the three-way valve 5, and 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 box to cool the passenger compartment. The second heat exchanger AR2 of the air conditioning box provides heat for heat source provision, and heats the air for dual-temperature zone wind temperature heating or dehumidification condition air heating.

[0050] See also Figure 6 , Figure 6 It is a schematic diagram of the coolant circuit for passenger compartment cooling or cooling and dehumidification and battery cooling. In this embodiment, the second interface and the third interface are connected, and are connected to the first heat exchanger AR1 of the air conditioning box through the first pass interface 51 and the second pass interface 52 of the three-way valve 5, and the first pass interface 51 and the third pass interface 53 of the three-way valve 5 are connected to the battery, and then the coolant flows to the fourth interface, and the fourth interface 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 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 box and the battery for cooling. The second heat exchanger AR2 of the air conditioning box provides heat for heat source provision, and heats the air for dual-temperature zone wind temperature heating or dehumidification condition air heating.

[0051] See also Figure 7 , Figure 7Schematic diagram of the coolant circuit for heating and dehumidifying the passenger compartment. In this embodiment, the second interface and the third interface are connected, and are connected to the first heat exchanger AR1 of the air-conditioning box through the first and second interfaces 51 and 52 of the three-way valve 5, and then connected to the seventh interface through the fourth interface. The coolant flows through the electric drive and electronic control module 3 and the 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 through 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 box, and the coolant of the high-temperature plate heat exchanger 2 flows through the second heat exchanger AR2 of the air-conditioning box. The air in the air-conditioning box first passes through the first heat exchanger AR1 for cooling and then flows through the second heat exchanger AR2 for heating, reducing the relative humidity of the outlet air, and performing heating and dehumidification.

[0052] See also Figure 8 , Figure 8 It is a schematic diagram of the coolant circuit for heating the passenger compartment. In this embodiment, the second interface is connected to the ninth interface, and the ninth interface is connected to the eighth interface. After the coolant flows to the electric drive and electronic control module 3 and the front heat exchanger 4, it is connected to the first interface through the seventh interface. In addition, the tenth interface is connected to the third interface, and is connected to the first heat exchanger AR1 through the first through interface 51 and the second through interface 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 electronic control module 3 and the front heat exchanger 4 to recover waste heat, and the coolant of the high-temperature plate heat exchanger 2 flows through the first heat exchanger AR1 of the air-conditioning box to heat.

[0053] See also Fig. 9 , Fig. 9 It is a schematic diagram of the coolant circuit for heating the passenger compartment and the battery. In this embodiment, the second interface is connected to the ninth interface, and the ninth interface is connected to the eighth interface. After the coolant flows to the electric drive and electronic control module 3 and the front heat exchanger 4, it is connected to the first interface through the seventh interface. And the tenth interface is connected to the third interface, and is respectively connected to the first heat exchanger AR1 and the battery through the three-way valve 5, and is connected 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 electronic control module 3 and the front heat exchanger 4 to recover waste heat, and the coolant of the high-temperature plate heat exchanger 2 flows through the first heat exchanger AR1 of the air-conditioning box and the battery for heating.

[0054] See also Fig.10 , Fig.10It is a schematic diagram of the coolant circuit for heating the battery by 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 through interface 51 and the third through interface 53 of the three-way valve 5, and then is connected to the seventh interface through the fourth interface. After the coolant flows through the electric drive and electronic control module 3 and the front-end heat exchanger 4, it flows through the seventh interface to the eighth interface, and the eighth interface is connected to the first interface. The tenth interface is also connected to the sixth interface. After the coolant flows through the second heat exchanger AR2, it flows through the fifth interface to the eleventh interface. In this embodiment, the coolant of the low-temperature plate heat exchanger 1 flows through the electric drive and electronic control module 3 for waste heat recovery to heat the battery.

[0055] Please refer to Fig.11 , Fig.11 It is a schematic diagram of the coolant circuit for air cooling of low-temperature batteries or heating of the passenger compartment and battery cooling. In this embodiment, the second interface is connected to the third interface, and is connected to the battery through the first through interface 51 and the third through interface 53 of the three-way valve 5, and then is connected to the seventh interface through the fourth interface. After the coolant flows through the electric drive and electronic control module 3 and the front-end heat exchanger 4, it flows through the ninth interface to the first interface. And the tenth interface is connected to the sixth interface. After the coolant flows through the second heat exchanger AR2, it flows through the fifth interface to the eleventh interface. In this embodiment, the coolant of the low-temperature plate heat exchanger 1 flows through the battery to cool the battery, then cools the electric drive and electronic control module 3, and finally dissipates heat to the environment through the front-end heat exchanger 4. The coolant of the high-temperature plate heat exchanger 2 flows through the second heat exchanger AR2 to heat the passenger compartment.

[0056] Furthermore, in some embodiments, as Fig.12 shown, on the basis of Figure 1 , a PTC module is further provided between the three-way valve 5 and the third interface. Adding the PTC module can improve the low-temperature robustness of the system.

[0057] In some embodiments, as Fig.13 shown, on the basis of Figure 1 , the electronic expansion valve EXV1 is simplified, reducing the hardware cost. By absorbing heat through the low-temperature plate heat exchanger 1, the compressor 14 heat generation circuit can be deleted.

[0058] 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 more concise; by controlling the internal passages of the eleven-way valve to connect multiple connection ports, better heat and cold exchange can be achieved; at the same time, the number of heat exchangers used can be reduced.

[0059] The present invention also provides an electric vehicle, comprising the electric vehicle thermal management system described above. The electric vehicle thermal management system comprises: a controller, a kettle 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, wherein the low-temperature plate heat exchanger 1 and the high-temperature plate heat exchanger 2 are connected through 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 box through an eleven-way valve.

[0060] Among them, the low-temperature plate heat exchanger 1 is connected to the first interface and the second interface of the eleven-way valve, the high-temperature plate heat exchanger 2 is connected to the tenth interface and the eleventh interface of the eleven-way valve, the air-conditioning box is connected to the fourth interface, the fifth interface and the sixth interface of the eleven-way valve, and the battery is connected to the third interface and the fourth interface of the eleven-way valve; the controller controls the connection status of the first interface, the second interface, the third interface, the fourth interface, the fifth interface, the sixth interface, the tenth interface and the eleventh interface inside the eleven-way valve to realize different thermal management modes.

[0061] Further, the controller forms a first circuit by controlling the first interface and the second interface of the eleven-way valve to be connected with the third interface and the fourth interface, or the controller forms a second circuit by controlling the tenth interface and the eleventh interface of the eleven-way valve to be connected with the third interface and the fourth interface, and the first circuit and the second circuit are used to execute different thermal management modes.

[0062] Furthermore, the battery is connected to the third interface of the eleven-way valve through the first interface 51 of the three-way valve 5; the second interface 52 of the three-way valve 5 is connected to the air conditioning box, and the third interface 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 interface.

[0063] Furthermore, the air-conditioning box includes a first heat exchanger AR1 and a second heat exchanger AR2, the first heat exchanger AR1 is connected to the second port 52, the second heat exchanger AR2 is connected to the fifth port of the eleven-way valve, and the first heat exchanger AR1 and the second heat exchanger AR2 can be connected in series through the fourth port and the fifth port of the eleven-way valve.

[0064] Furthermore, the third connection 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 end of the battery, the second node 11 is connected to the output end of the battery, and the third node 12 is connected to the first heat exchanger AR1 through a one-way valve 9.

[0065] 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.

[0066] Furthermore, the electric vehicle thermal management system also includes an electric drive and electric control module 3 and a front heat exchanger 4. The electric drive and electric 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 interface of the eleven-way valve and the ninth interface of the eleven-way valve. The electric drive and electric control module 3 and the front heat exchanger 4 are connected through the fourth node 13.

[0067] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system for an electric vehicle, characterized in that: include: A controller, a kettle 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 through 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 box through an eleven-way valve; Among them, the low-temperature plate heat exchanger is connected to the first interface and the second interface of the eleven-way valve, the high-temperature plate heat exchanger is connected to the tenth interface and the eleventh interface of the eleven-way valve, the air-conditioning box is connected to the fourth interface, the fifth interface and the sixth interface of the eleven-way valve, and the battery is connected to the third interface and the fourth interface of the eleven-way valve; the controller controls the connection status of the first interface, the second interface, the third interface, the fourth interface, the fifth interface, the sixth interface, the tenth interface and the eleventh interface inside the eleven-way valve to realize different thermal management modes.

2. The electric vehicle thermal management system according to claim 1, characterized in that: The controller forms a first circuit by controlling the first interface and the second interface of the eleven-way valve to be connected with the third interface and the fourth interface, or the controller forms a second circuit by controlling the tenth interface and the eleventh interface of the eleven-way valve to be connected with the third interface and the fourth interface, and the first circuit and the second circuit are used to execute different thermal management modes.

3. The electric vehicle thermal management system according to claim 1, characterized in that: The battery is connected to the third interface of the eleven-way valve through the first interface of the three-way valve; the second interface of the three-way valve is connected to the air-conditioning box, and the third interface of the three-way valve is connected to the battery.

4. The electric vehicle thermal management system according to claim 3, characterized in that: A PTC module is also provided between the three-way valve and the third interface.

5. The electric vehicle thermal management system according to claim 3, characterized in that: The air conditioning box includes a first heat exchanger and a second heat exchanger, the first heat exchanger is connected to the second interface, the second heat exchanger is connected to the fifth interface of the eleven-way valve, and the first heat exchanger and the second heat exchanger can be connected in series through the fourth interface and the fifth interface of the eleven-way valve.

6. The electric vehicle thermal management system according to claim 5, characterized in that: The third connection interface is connected to the fourth interface through the first node, the second node, and the third node. The first node is directly connected to the input end of the battery, the second node is connected to the output end of the battery, and the third node is connected to the first heat exchanger through a one-way valve.

7. The electric vehicle thermal management system according to claim 5, characterized in that: It also includes an electric drive and electric control module, and a front heat exchanger. The electric drive and electric control module are connected to the seventh interface of the eleven-way valve, and the front heat exchanger is connected to the eighth interface and the ninth interface of the eleven-way valve. The electric drive and electric control module and the front heat exchanger are connected through the fourth node.

8. The electric vehicle thermal management system according to claim 6, characterized in that: A third coolant pump is provided between the battery and the second node.

9. The electric vehicle thermal management system according to claim 1, characterized in that: 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.

10. An electric vehicle, characterized in that: An electric vehicle thermal management system comprising any one of claims 1 to 9.

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