Thermal management system of electric automobile and electric automobile

Abstract

The utility model discloses a thermal management system of an electric automobile and the electric automobile, the thermal management system of the electric automobile comprises: an electric drive heat exchange water path comprising a drive motor, a heat exchanger and an electric drive water pump which are sequentially connected in series and form a loop; the battery heat exchange water path comprises the heat exchanger, a battery water pump and a battery pack which are sequentially connected in series to form a loop; the warm air water way comprises a warm air core body, a warm air water pump and a condenser which are sequentially connected in series to form a loop; the refrigerant pipeline comprises the heat exchanger and the condenser which are sequentially connected in series; the control valve is arranged at the joint of the electric drive heat exchange water way and the battery heat exchange water way, so that at least one of the electric drive heat exchange water way and the battery heat exchange water way is conducted, and heat exchange is conducted through a refrigerant pipeline and the warm air water way; or the electric drive heat exchange water way and the battery heat exchange water way are conducted to form a battery heating water way. According to the utility model, the waste heat of the motor and / or the waste heat of the battery can be fully recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a thermal management system of an electric vehicle and the electric vehicle. Background Art

[0002] Due to different properties and design requirements, the various systems and components of pure electric vehicles have different optimal operating temperature ranges. Therefore, external auxiliary means are needed to maintain the components within an appropriate temperature range to ensure the normal, stable and efficient operation of the components and that the passenger compartment meets the comfort needs of passengers.

[0003] With the rapid development of the electric vehicle industry, the integration of vehicle control systems is becoming increasingly higher, the 800V high-voltage system is more efficient and charges faster, the battery pulse heating temperature rise is faster and more efficient, and the thermal management system of electric vehicles is also constantly improving in the direction of high efficiency and energy saving. However, at this stage, the waste heat of the motor and the battery is not fully utilized. At the same time, considering the huge cooling demand of the battery under the 800V fast charging condition of electric vehicles, the existing battery cooling method has poor cooling effect and high cooling cost, and the existing battery cooling method cannot take into account the battery pulse heating function. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art, namely, low utilization rate of motor waste heat and battery waste heat, poor cooling effect of the existing battery cooling method, high cooling cost, and inability to take into account the battery pulse heating function.

[0005] To this end, one object of the utility model is to provide a thermal management system for an electric vehicle, the thermal management system for the electric vehicle comprising:

[0006] An electrically driven water exchange circuit comprises a drive motor, a heat exchanger and an electrically driven water pump which are sequentially connected in series to form a loop;

[0007] A battery water exchange circuit, comprising the heat exchanger, the battery water pump and the battery pack which are sequentially connected in series to form a loop;

[0008] A heating water circuit, comprising a heating core, a heating water pump and a condenser which are sequentially connected in series to form a loop;

[0009] A refrigerant pipeline, comprising the heat exchanger and the condenser connected in series in sequence;

[0010] A control valve is arranged at the connection between the electric drive water exchange circuit and the battery water exchange circuit to make at least one of the electric drive water exchange circuit and the battery water exchange circuit conductive, and then exchange heat with the warm air water circuit through the refrigerant pipeline; or make the electric drive water exchange circuit and the battery water exchange circuit conductive to form a battery heating water circuit.

[0011] In some embodiments, the thermal management system of the electric vehicle further includes a heater;

[0012] The heater is connected in series in the warm air water path, the inlet of the heater is connected to the outlet of the condenser, and the outlet of the heater is connected to the inlet of the warm air core; or

[0013] The heater is connected in parallel with the condenser, and the heater, the warm air core, and the warm air water pump are sequentially connected in series to form a warm air heating water circuit.

[0014] In some embodiments, the thermal management system of the electric vehicle also includes a radiator, the inlet of the radiator is respectively connected to the outlet of the drive motor and the outlet of the battery pack, and the outlet of the radiator is respectively connected to the inlet of the electric drive water pump and the inlet of the battery water pump, so that the radiator, the electric drive water pump and the drive motor are connected in series in sequence to form an electric drive heat dissipation cooling circuit, the radiator, the battery water pump and the battery pack are connected in series in sequence to form a battery heat dissipation cooling circuit, and the control valve is arranged at the connection between the electric drive heat dissipation cooling circuit and the battery heat dissipation cooling circuit.

[0015] In some embodiments, the outlet of the drive motor is also connected to the inlet of the heater core, and the outlet of the condenser is also connected to the inlet of the radiator, so that the radiator, electric water pump, drive motor, heater core, heater water pump and condenser are connected in series in sequence to form an air-conditioning cooling circuit, and the control valve is arranged on the pipeline between the outlet of the condenser and the inlet of the radiator, or on the pipeline between the outlet of the drive motor and the inlet of the heater core.

[0016] In some embodiments, the control valve includes a five-way valve, the five-way valve includes a first valve port, a second valve port, a third valve port, a fourth valve port and a fifth valve port, the inlet of the radiator is connected to the first valve port, the outlet of the drive motor is connected to the second valve port, the outlet of the battery pack is connected to the third valve port, the water inlet of the heat exchanger is connected to the fourth valve port, and the outlet of the condenser is connected to the fifth valve port;

[0017] The five-way valve has four flow states. When the five-way valve is in the first flow state, the first valve port and the second valve port are connected, and the third valve port and the fourth valve port are connected, so that the electric drive heat dissipation cooling circuit and the battery heat exchange water circuit are connected respectively; when the five-way valve is in the second flow state, the first valve port and the fifth valve port are connected, and the third valve port and the fourth valve port are connected, so that the air conditioning cooling circuit is connected; when the five-way valve is in the third flow state, the second valve port, the third valve port and the fourth valve port are connected, and the first valve port and the fifth valve port are not connected to each other, so that at least one of the electric drive heat exchange water circuit and the battery heat exchange water circuit is connected, or the battery heating water circuit is connected; when the five-way valve is in the fourth flow state, the first valve port, the second valve port and the third valve port are connected, and the fourth valve port and the fifth valve port are not connected to each other, so that the electric drive heat dissipation cooling circuit and the battery heat dissipation cooling circuit are connected respectively.

[0018] In some embodiments, the thermal management system also includes a first three-way pipe and a second three-way pipe, and the first three-way pipe and the second three-way pipe are sequentially connected in series in the electric drive water exchange circuit between the heat exchanger and the electric drive water pump, and the third interface of the first three-way pipe is connected to the inlet of the electric drive water pump, and the third interface of the second three-way pipe is connected to the outlet of the radiator.

[0019] In some embodiments, the thermal management system also includes a third three-way pipe, a fourth three-way pipe and a fifth three-way pipe connected in the air-conditioning cooling circuit, the third three-way pipe and the fourth three-way pipe are respectively connected in series on the pipeline between the outlet of the drive motor and the inlet of the heater core, the fifth three-way pipe is connected in series on the pipeline between the water outlet of the condenser and the inlet of the radiator, and the third interface of the third three-way pipe is respectively connected to the inlet of the radiator and the inlet of the heat exchanger, and the third interface of the fourth three-way pipe is connected to the third interface of the fifth three-way pipe.

[0020] In some embodiments, a first one-way valve or a first stop valve is provided on the pipeline between the outlet of the battery pack and the third valve port;

[0021] A second one-way valve or a second stop valve is arranged on the pipeline between the water outlet of the condenser and the inlet of the warm air core.

[0022] In some embodiments, the thermal management system of the electric vehicle also includes an overflow tank, the inlet of the overflow tank is respectively connected to the outlet of the drive motor, the outlet of the battery pack and the outlet of the condenser, and the outlet of the overflow tank is connected to the inlet of the radiator.

[0023] Another object of the present invention is to provide an electric vehicle, comprising the above-mentioned thermal management system of the electric vehicle.

[0024] The thermal management system of an electric vehicle and the electric vehicle provided by the embodiment of the utility model have the following beneficial effects:

[0025] An electric drive heat exchange circuit is provided, which is formed by a driving motor, a heat exchanger and an electric drive water pump connected in series in sequence; a battery heat exchange circuit is provided, which is formed by a heat exchanger, a battery water pump and a battery pack connected in series in sequence; a warm air water circuit is provided, which is formed by a warm air core, a warm air water pump and a condenser connected in series in sequence; and a heat exchanger and a condenser are provided in series to form a refrigerant pipeline, and a control valve is provided at the connection between the electric drive heat exchange circuit and the battery heat exchange circuit, so that at least one circuit in the electric drive heat exchange circuit and the battery heat exchange circuit can be connected, and then heat can be exchanged with the warm air water circuit through the refrigerant pipeline, and the passenger compartment can be heated by using the motor waste heat and / or the battery waste heat; and the electric drive heat exchange circuit and the battery heat exchange circuit can be connected to form a battery heating water circuit, and the motor waste heat can be used to heat the battery, so as to fully recycle the motor waste heat and / or the battery waste heat, improve the waste heat utilization rate of the motor and the battery, improve the thermal management system performance of the electric vehicle, and improve the battery charging efficiency;

[0026] The same radiator is used to connect the drive motor and the battery to form an electric drive heat dissipation cooling circuit and a battery heat dissipation cooling circuit, which cools the drive motor and the battery separately while reducing the cooling cost; the battery can be cooled by the heat exchanger in the battery heat exchange circuit or by the radiator in the battery heat dissipation cooling circuit. The battery cooling method is diverse, and the battery pulse heating function can be taken into account to improve the battery cooling performance;

[0027] The radiator, electric water pump, drive motor, heater, heater core, heater water pump and condenser are connected in series to form an air conditioning cooling circuit, and the air conditioning cooling circuit is controlled by a control valve. The condenser and radiator are connected in series to realize the radiator-assisted air conditioning cooling function, effectively improving the cooling capacity of the air conditioning system;

[0028] Different pipelines in the thermal management system of electric vehicles use multifunctional integrated five-way valves to achieve on-off, saving space for component layout and facilitating control. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 is a schematic structural diagram of a thermal management system for an electric vehicle according to an embodiment of the utility model;

[0031] Figure 2 It is a schematic diagram of an electric drive water exchange circuit, a battery water exchange circuit and a warm air water circuit according to an embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of an electric drive heat dissipation cooling circuit and a battery heat dissipation cooling circuit according to an embodiment of the utility model;

[0033] Figure 4 It is a schematic diagram of an electric drive heat dissipation cooling circuit and a battery heat exchange circuit according to an embodiment of the utility model;

[0034] Figure 5 It is a schematic diagram of an air conditioning cooling circuit and a battery heat exchange circuit according to an embodiment of the utility model;

[0035] Figure 6 It is a structural schematic diagram of another thermal management system of an electric vehicle according to an embodiment of the utility model.

[0036] Reference numerals:

[0037] 1. Drive motor; 2. Heat exchanger; 3. Electric drive water pump; 4. Battery water pump; 5. Battery pack; 6. Heater core; 7. Heater water pump; 8. Condenser; 9. On-board power supply; 10. Heater; 11. Radiator; 12. Five-way valve; 13. First three-way pipe; 14. Second three-way pipe; 15. Third three-way pipe; 16. Fourth three-way pipe; 17. Fifth three-way pipe; 18. Sixth three-way pipe; 19. Seventh three-way pipe; 20. First non-return valve; 21. Second non-return valve; 22. Overflow tank; 101. Electric drive hot water exchange circuit; 102. Battery hot water exchange circuit; 103. Heater water circuit; 104. Heater heating water circuit; 105. Electric drive heat dissipation cooling circuit; 106. Battery heat dissipation cooling circuit; 107. Air conditioning cooling circuit; 200. Refrigerant pipeline. DETAILED DESCRIPTION

[0038] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0039] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of the embodiments. Other modifications within the scope and spirit of the present utility model will occur to those skilled in the art.

[0040] The accompanying drawings, which are included in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, are used to explain the principles of the present invention.

[0041] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0042] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present invention that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0043] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0044] Specific embodiments of the present invention are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present invention. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of ways with substantially any suitable detailed structure.

[0045] Figures 1 to 6 The solid lines in the figure represent water pipes, and the dotted lines represent refrigerant pipes.

[0046] The first embodiment of the utility model provides a thermal management system for an electric vehicle, such as Figure 1 and Figure 2 As shown, the thermal management system of the electric vehicle includes:

[0047] The electric driven water exchange circuit 101 comprises a driving motor 1, a heat exchanger (Chiller) 2 and an electric driven water pump 3 which are sequentially connected in series to form a loop;

[0048] The battery water exchange circuit 102 includes a heat exchanger 2, a battery water pump 4 and a battery pack 5 which are connected in series to form a loop;

[0049] The warm air water circuit 103 includes a warm air core 6, a warm air water pump 7 and a condenser 8 which are sequentially connected in series to form a loop;

[0050] The refrigerant pipeline 200 includes a heat exchanger 2 and a condenser 8 connected in series;

[0051] A control valve is provided at the connection between the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 to make at least one of the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 conductive, and then exchange heat with the warm air water circuit 103 through the refrigerant pipeline 200; or make the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 conductive to form a battery heating water circuit.

[0052] Specifically, the heat exchanger 2 has a water inlet M, a water outlet N, a refrigerant inlet P and a refrigerant outlet Q, such as Figure 2 As shown, the water inlet M of the heat exchanger 2 is connected to the water outlet of the drive motor 1 and the water outlet of the battery pack 5 through water pipelines, and the water outlet N of the heat exchanger 2 is connected to the water inlet of the drive motor 1 and the water inlet of the battery pack 5 through water pipelines. An electric drive water pump 3 is provided on the pipeline between the water outlet N of the heat exchanger 2 and the water inlet of the drive motor 1, and a battery water pump 4 is provided on the pipeline between the water outlet N of the heat exchanger 2 and the water inlet of the battery pack 5, so that the heat exchanger 2, the electric drive water pump 3 and the drive motor 1 are connected to the water outlet N of the heat exchanger 2 and the water inlet of the battery pack 5. The electric motor 1 is connected in series to form an electric drive hot water exchange circuit 101, and the heat exchanger 2, the battery water pump 4 and the battery pack 5 are connected in series to form a battery hot water exchange circuit 102. The electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 are both circulating water circuits. The electric drive water pump 3 is used to pump the coolant passing through the heat exchanger 2 into the drive motor 1 to control the electric drive hot water exchange circuit 101, and the battery water pump 4 is used to pump the coolant passing through the heat exchanger 2 into the battery pack 5 to control the battery hot water exchange circuit 102. That is, the drive motor 1 and the battery pack 5 are connected in parallel, and then connected in series with the heat exchanger 2 respectively, to form two different hot water exchange circuits, the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102, and the coolant can flow in the above two water circuits respectively. The electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 share part of the water inlet and outlet pipes of the heat exchanger 2.

[0053] The condenser 8 has a water inlet U, a water outlet V, a refrigerant inlet X and a refrigerant outlet Y. The warm air water pump 7 is connected in series to the water outlet pipe of the warm air core 6. The water inlet U of the condenser 8 is connected to the outlet of the warm air water pump 7, and the water outlet V of the condenser 8 is connected to the inlet of the warm air core 6, forming the above-mentioned warm air water circuit 103, which is also a circulating water circuit.

[0054] The refrigerant outlet Q of the heat exchanger 2 is connected to the refrigerant inlet X of the condenser 8, and the refrigerant outlet Y of the condenser 8 is connected to the refrigerant inlet P of the heat exchanger 2, forming a refrigerant pipeline 200, which is a circulation loop for the refrigerant to circulate between the heat exchanger 2 and the condenser 8.

[0055] Since the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 share a part of the water pipeline, a control valve (such as a multi-way valve) can be set at the connection between the two to control the conduction of the electric drive hot water exchange circuit 101, or control the conduction of the battery hot water exchange circuit 102, or control the conduction of the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 at the same time. When at least one of the water circuits of the electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 is connected, the motor and / or battery waste heat can be used to heat the passenger compartment by controlling the corresponding electric drive water pump 3 and / or battery water pump 4 in the pipeline. That is, the electric drive hot water exchange circuit 101 and / or the battery hot water exchange circuit 102 can form an air conditioning heating circuit together with the warm air water circuit 103 and the refrigerant pipeline 200, and the passenger compartment is heated by heat exchange between the heat exchanger 2 and the condenser 8.

[0056] After the control valve controls the electric drive water exchange circuit 101 to be turned on, when the motor waste heat is needed to heat the passenger compartment, the electric drive water pump 3 is turned on, and the hot water in the electric drive water exchange circuit 101 is heat-exchanged with the refrigerant in the refrigerant pipeline of the heat exchanger 2 at the heat exchanger 2, and the heated refrigerant flows to the condenser 8 through the refrigerant pipeline 200, and heat-exchanges with the warm air circuit 103 at the condenser 8 to heat the warm air circuit 103, and the heated hot water flows to the warm air core 6, and the hot air is blown out through the warm air core 6 to heat the passenger compartment. That is, the heat pump system can absorb the heat generated by the operation of the drive motor 1, and release the heat to the warm air circuit 103 through the condenser 8 to heat the passenger compartment.

[0057] Similarly, after the control valve controls the battery hot water circuit 102 to be turned on, when the battery waste heat is needed to heat the passenger compartment, the battery water pump 4 is turned on, and the hot water in the battery hot water circuit 102 exchanges heat with the refrigerant in the refrigerant pipeline of the heat exchanger 2 at the heat exchanger 2. The heated refrigerant flows to the condenser 8 through the refrigerant pipeline 200, exchanges heat with the warm air circuit 103 at the condenser 8, and blows out hot air through the warm air core 6 to heat the passenger compartment. When the battery is used to heat the passenger compartment, the heat exchanger 2 absorbs the battery waste heat to cool the battery pack 5, thereby achieving synchronization of battery cooling and passenger compartment heating. After the control valve controls the electric drive heat exchange circuit 101 and the battery heat exchange circuit 102 to be connected, when the electric drive water pump 3 and the battery water pump 4 are turned on at the same time, the electric drive heat exchange circuit 101 and the battery heat exchange circuit 102 can be used to exchange heat with the refrigerant pipeline 200 and the warm air water circuit 103 to form an air conditioning heating circuit, and the air conditioning system (heat exchanger 2) is used to heat the passenger compartment, so as to maximize the waste heat recovery function of the power system and reduce the frost probability of the outdoor heat exchanger of the heat pump system (passenger compartment heating system). That is, in this embodiment, the heat exchanger 2 is a heat absorbing component, which is used to absorb the heat generated by the driving motor 1 and / or the battery pack 5, and transfer the absorbed heat to the condenser 8 through the refrigerant pipeline 200; the condenser 8 is a heat releasing component, which can release the heat absorbed by the heat exchanger 2 to the passenger compartment, thereby heating the passenger compartment.

[0058] The thermal management system of the electric vehicle also includes an on-board power supply 9. The on-board power supply 9 and the drive motor 1 together constitute the electric drive system of the electric vehicle. When the on-board power supply 9 is working, it also generates a certain amount of heat, which can be used for heating the passenger compartment like the above-mentioned drive motor 1. The on-board power supply 9 is preferably a three-in-one, including a DC / DC converter, a charger (OBC) and a power distribution box (PDU). In this embodiment, the on-board power supply 9 is connected in series in the electric drive water exchange circuit 101 and is located upstream of the drive motor 1, so as to facilitate the recovery of waste heat from the drive motor 1 and the on-board power supply 9. In a specific implementation, the on-board power supply 9 can also be connected in parallel with the drive motor 1 through a water pipeline.

[0059] Furthermore, the control valve disposed at the connection between the electric drive water exchange circuit 101 and the battery water exchange circuit 102 can also conduct the electric drive water exchange circuit 101 and the battery water exchange circuit 102, so that the motor waste heat can be used to heat the battery pack 5. Figure 2 As shown, the pipeline connected to the outlet of the battery pack 5 in the battery hot water exchange circuit 102 is connected to the pipeline between the outlet of the drive motor 1 and the water inlet M of the heat exchanger 2 in the battery hot water exchange circuit 102, so that the drive motor 1 is located upstream of the battery pack 5.

[0060] The electric drive water pump 3, the drive motor 1, the heat exchanger 2, the battery water pump 4 and the battery pack 5 are connected in series in sequence to form a battery heating water circuit, which can utilize the heat generated by the motor stall or the motor waste heat to heat the battery, thereby improving the utilization rate of the motor waste heat. In addition, in this embodiment, the battery heating function mainly based on coolant is abandoned, and the battery is heated by the motor waste heat, which can take into account the battery pulse heating function and improve the battery charging efficiency. The thermal management system of the electric vehicle provided by the embodiment of the utility model is provided by setting the drive motor 1, the heat exchanger 2 and the electric drive water pump 3 in series to form an electric drive heat exchange circuit 101, setting the heat exchanger 2, the battery water pump 4 and the battery pack 5 in series to form a battery heat exchange circuit 102, setting the warm air core 6, the warm air water pump 7 and the condenser 8 in series to form a warm air water circuit 103, and setting the heat exchanger 2 and the condenser 8 in series to form a refrigerant pipeline 200, and setting a control valve at the connection between the electric drive heat exchange circuit 101 and the battery heat exchange circuit 102, that is, At least one of the electric drive water exchange circuit 101 and the battery water exchange circuit 102 can be connected, and then heat can be exchanged with the warm air water circuit 103 through the refrigerant pipeline 200, and the passenger compartment can be heated by the motor waste heat and / or the battery waste heat. The electric drive water exchange circuit 101 and the battery water exchange circuit 102 can also be connected to form a battery heating water circuit, and the motor waste heat can be used to heat the battery, so as to fully recycle the motor waste heat and / or the battery waste heat, improve the waste heat utilization rate of the motor and the battery, improve the thermal management system performance of the electric vehicle, and improve the battery charging efficiency.

[0061] There are one or more control valves. For example, the control valve may be a multi-way valve provided on the water inlet pipeline of the heat exchanger 2. The multi-way valve has multiple valve ports. By controlling each valve port, at least one of the electric-driven hot water exchange circuit 101 and the battery hot water exchange circuit 102 can be connected, or the electric-driven hot water exchange circuit 101 and the battery hot water exchange circuit 102 can be connected. The control valve may be two control valves, which are respectively provided on the water inlet pipeline and the water outlet pipeline of the heat exchanger 2. The first control valve provided on the water inlet pipeline of the heat exchanger 2 can be used to control the connection between the electric-driven hot water exchange circuit 101 and the battery hot water exchange circuit 102, and the second control valve provided on the water outlet pipeline of the heat exchanger 2 can be used to control the connection between at least one of the electric-driven hot water exchange circuit 101 and the battery hot water exchange circuit 102.

[0062] It should be noted that, in the present embodiment, the coolant in the water pipeline is cooling water, which is convenient for cooling and has low cost; in a specific implementation, the coolant may also be an alcohol-type coolant, a glycerin-type coolant, an ethylene glycol-type coolant, a propylene glycol-type coolant, etc.

[0063] In this embodiment, there is no requirement for the front and back order of the components of the warm air water circuit 103 (warm air core 6, warm air water pump 7 and condenser 8), as long as the warm air water circuit 103 can be formed. In the above embodiments, the refrigerant pipeline 200 is a circulation loop. In other embodiments, the refrigerant pipeline 200 can be a one-way pipeline flowing from the heat exchanger 2 to the condenser 8. The specific form of the refrigerant pipeline 200 is not specifically limited in this application, as long as it can achieve heat absorption by the heat exchanger 2 and heat release by the condenser 8. In this embodiment, except for the refrigerant pipeline 200, other pipelines are water pipelines. Therefore, the pipelines between different devices refer to the water pipelines between different devices. The condenser 8 is preferably a water-cooled condenser.

[0064] In some embodiments, the thermal management system of the electric vehicle also includes a heater (PTC) 10, which is connected in series in the warm air water circuit 103. The inlet of the heater 10 is connected to the outlet of the condenser 8, and the outlet of the heater 10 is connected to the inlet of the warm air core 6, that is, the heater 10, the warm air core 6, the warm air water pump 7, and the condenser 8 are connected in series in sequence to form the warm air water circuit 103.

[0065] The heater 10 is connected in series in the warm air water circuit 103. When at least one of the above-mentioned electric drive hot water exchange circuit 101 and the battery hot water exchange circuit 102 is used to exchange heat with the warm air water circuit 103 through the refrigerant pipeline 200 to heat the passenger compartment, the heater 10 connected in series in the warm air water circuit 103 can also be used to heat the coolant at the same time, so that the passenger compartment is quickly heated and the heating effect is improved.

[0066] In other embodiments, Figure 6 As shown, the heater 10 can also be connected in parallel with the condenser 8, and in series with the warm air core 6 and the warm air water pump 7 to form an independent warm air heating water circuit 104. The passenger compartment can be heated by heating the warm air heating water circuit 104 by heating the heater 10. Combined with the air conditioning heating circuit formed by the above-mentioned warm air water circuit 103, it can meet various heating needs and improve user experience.

[0067] The above-mentioned warm air water circuit 103 with the warm air core 6, warm air water pump 7 and condenser 8 connected in series can also be used for passenger compartment cooling. When the passenger compartment needs to be cooled, the coolant in the warm air circuit 103 exchanges heat with the refrigerant in the refrigerant pipe 200 of the condenser 8 to reduce the temperature of the refrigerant in the refrigerant pipe 200 of the condenser 8 (the refrigerant is condensed in the condenser 8), and the evaporator evaporates and absorbs heat from the cooled liquid refrigerant to reduce the air temperature. The cooled air is blown to the passenger compartment in the form of cold air at the warm air core 6 for cooling.

[0068] In this embodiment, the thermal management system of the electric vehicle is specifically described by taking the heater 10 connected in series in the warm air water path 103 as an example.

[0069] In some embodiments, Figure 3 As shown, the thermal management system of the electric vehicle also includes: a radiator 11, the inlet of the radiator 11 is connected to the outlet of the drive motor 1 and the outlet of the battery pack 5 respectively, and the outlet of the radiator 11 is connected to the inlet of the electric drive water pump 3 and the inlet of the battery water pump 4 respectively, so that the radiator 11, the electric drive water pump 3 and the drive motor 1 are connected in series in sequence to form an electric drive heat dissipation cooling circuit 105, the radiator 11, the battery water pump 4 and the battery pack 5 are connected in series in sequence to form a battery heat dissipation cooling circuit 106, and the control valve is arranged at the connection between the electric drive heat dissipation cooling circuit 105 and the battery heat dissipation cooling circuit 106.

[0070] Among them, the electric drive heat dissipation cooling circuit 105 and the battery heat dissipation cooling circuit 106 share a part of the water pipeline (the inlet and outlet pipelines of the radiator 11), the drive motor 1 and the battery pack 5 are connected in parallel, the electric drive heat dissipation cooling circuit 105 and the battery heat dissipation cooling circuit 106 are independent of each other, and the radiator 11 can be used to cool the drive motor 1 and the battery pack 5 respectively.

[0071] The control valve can be set on the inlet pipeline of the radiator 11, at the position where it merges with the outlet pipeline of the drive motor 1 and the outlet pipeline of the battery pack 5, or set on the outlet pipeline of the radiator 11, at the position where it merges with the inlet pipeline of the electric drive water pump 3 and the inlet pipeline of the battery water pump 4, so as to achieve the separate conduction of the electric drive heat dissipation cooling circuit 105 and the battery heat dissipation cooling circuit 106, and use the radiator 11 to cool the drive motor 1 and the battery pack 5 respectively.

[0072] Using the radiator 11 to cool the battery pack 5 is suitable for low temperature environments. When the temperature is high, such as Figure 4 As shown, the battery pack 5 can be cooled by the heat exchanger 2 through the battery heat exchange circuit 102, and the drive motor 1 can be cooled by the radiator 11 through the electric drive heat dissipation cooling circuit 105, so as to achieve rapid cooling of the battery pack 5 and the drive motor 1. When the heat exchanger 2 is used to cool the battery pack 5, the refrigerant in the air conditioning system evaporates after the expansion valve throttling, absorbs the heat of the coolant in the battery heat exchange circuit 102, and the refrigerant takes away the heat of the coolant through heat exchange, thereby reducing the temperature of the battery pack 5.

[0073] As described above, in this embodiment, different battery cooling methods can be used to meet the battery cooling requirements under different temperature conditions, thereby improving the battery cooling efficiency and effect.

[0074] In some embodiments, Figure 5As shown, the outlet of the drive motor 1 is also connected to the inlet of the heater core 6, and the outlet of the condenser 8 is also connected to the inlet of the radiator 11. The radiator 11, the electric water pump 3, the drive motor 1, the heater core 6, the heater water pump 7 and the condenser 8 are connected in series in sequence to form an air-conditioning cooling circuit 107. The control valve is arranged on the pipeline between the outlet of the condenser 8 and the inlet of the radiator 11, or on the pipeline between the outlet of the drive motor 1 and the inlet of the heater core 6.

[0075] Specifically, on the basis of the original water pipeline, the electric drive heat dissipation cooling circuit 105 and the warm air water circuit 103 can be connected in series to form an air-conditioning cooling circuit 107, and the air-conditioning cooling circuit 107 can be controlled by a control valve arranged on the pipeline between the outlet of the condenser 8 and the inlet of the radiator 11 or on the pipeline between the outlet of the drive motor 1 and the inlet of the warm air core 6.

[0076] In a high temperature environment, for example, when the battery pack 5 is under 800V fast charging conditions, the battery pack 5 has a large cooling demand. At this time, the battery pack 5 can be cooled by using the heat exchanger 2 through the battery water exchange circuit 102. After the heat exchanger 2 undergoes heat exchange with the refrigerant, the refrigerant releases the heat at the condenser 8 through the refrigerant pipeline 200 to the cooling water circuit of the condenser 8. Since the radiator 11 is connected in series with the condenser 8 to form an air-conditioning cooling circuit 107, the coolant in the radiator 11 can be used to cool part of the heat released to the condenser 8 by the air-conditioning system, that is, the air-conditioning cooling circuit 107 is used to realize the radiator 11 auxiliary air-conditioning cooling function, thereby maximizing the cooling capacity of the air-conditioning system.

[0077] Optional, such as Figures 1 to 6 As shown, the control valve includes a five-way valve 12, and the five-way valve 12 includes a first valve port a, a second valve port b, a third valve port c, a fourth valve port d and a fifth valve port e. The inlet of the radiator 11 is connected to the first valve port a, the outlet of the drive motor 1 is connected to the second valve port b, the outlet of the battery pack 5 is connected to the third valve port c, the water inlet of the heat exchanger 2 is connected to the fourth valve port d, and the outlet of the condenser 8 is connected to the fifth valve port e.

[0078] The five-way valve 12 has four flow states. When the five-way valve 12 is in the first flow state, the first valve port a and the second valve port b are connected, and the third valve port c and the fourth valve port d are connected, so that the electric drive heat dissipation cooling circuit 105 and the battery heat exchange circuit 102 are connected respectively; when the five-way valve 12 is in the second flow state, the first valve port a and the fifth valve port e are connected, and the third valve port c and the fourth valve port d are connected, so that the air conditioning cooling circuit 107 is connected; when the five-way valve 12 is in the third flow state, the first valve port a and the fifth valve port e are connected, and the third valve port c and the fourth valve port d are connected, so that the air conditioning cooling circuit 107 is connected; The second valve port b, the third valve port c and the fourth valve port d are connected, and the first valve port a and the fifth valve port e are not connected to each other, so that at least one of the electric drive heat exchange circuit 101 and the battery heat exchange circuit 102 is connected, or the battery heating water circuit is connected; when the five-way valve 12 is in the fourth flow state, the first valve port a, the second valve port b and the third valve port c are connected, and the fourth valve port d and the fifth valve port e are not connected to each other, so that the electric drive heat dissipation cooling circuit 105 and the battery heat dissipation cooling circuit 106 are respectively connected.

[0079] The five-way valve 12 is arranged at the connection point of the outlet pipeline of the drive motor 1 and the battery pack 5 and the inlet pipeline of the heat exchanger 2 and the radiator 11. Through the selective operation of the five-way valve 12 in different flow states, the above-mentioned electric drive water exchange circuit 101, the battery water exchange circuit 102, the battery heating water circuit, the electric drive heat dissipation cooling circuit 105, the battery heat dissipation cooling circuit 106 and the air conditioning cooling circuit 107 can be turned on or off, which is beneficial to reduce the system development cost, save the space for component layout, and facilitate control.

[0080] like Figure 4 As shown, when the five-way valve 12 is in the first flow state, the electric drive heat dissipation cooling circuit 105 and the battery hot water exchange circuit 102 are respectively connected, and the warm air water circuit 103 is connected, the radiator 11 can be used to cool the drive motor 1, and the battery hot water exchange circuit 102 can be used to cool the battery pack 5.

[0081] like Figure 5 As shown, when the five-way valve 12 is in the second flow state, the battery heat exchange circuit 102 is open, and the air conditioning cooling circuit 107 is open. The battery pack 5 is cooled by the air conditioning system (heat exchanger 2), and the condenser 8 is connected in series with the radiator 11, and the radiator 11 assists the air conditioning system in cooling.

[0082] like Figure 2 As shown, when the five-way valve 12 is in the third flow state, at least one of the electric drive heat exchange circuit 101 and the battery heat exchange circuit 102 is connected, and the warm air circuit 103 is connected. At this time, the heat exchanger 2 can absorb the waste heat of the drive motor 1 and / or the battery pack 5 to achieve heating of the passenger compartment.

[0083] like Figure 3As shown, when the five-way valve 12 is in the fourth flow state, the electric drive heat dissipation cooling circuit 105 is turned on, and the battery heat dissipation cooling circuit 106 is turned on. At this time, the battery pack 5 does not need to start the heat exchanger 2 for cooling, and the drive motor 1 and the battery pack 5 can use the radiator 11 together for cooling.

[0084] In a specific implementation, other single or multiple valve bodies can be used to replace the five-way valve 12. For example, the control valve can include multiple one-way valves to control each water circuit separately, or the control valve can include a combination of a three-way valve or a four-way valve and a one-way valve.

[0085] Optionally, multiple pipelines may be connected by a tee or a cross pipe, thereby reducing the number of accessories used in the entire system and optimizing the pipeline layout.

[0086] like Figures 1 to 3 As shown, the thermal management system also includes a first three-way pipe 13 and a second three-way pipe 14, which are connected in series in the electric drive water exchange circuit 101 between the heat exchanger 2 and the electric drive water pump 3, and the third interface C of the first three-way pipe 13 is connected to the inlet of the electric drive water pump 3, and the third interface C of the second three-way pipe 14 is connected to the outlet of the radiator 11.

[0087] Specifically, the first interface A of the first three-way pipe 13 is connected to the water outlet M of the heat exchanger 2, the second interface B of the first three-way pipe 13 is connected to the first interface A of the second three-way pipe 14, and the second interface B of the second three-way pipe 14 is connected, so that the first three-way pipe 13 and the second three-way pipe 14 are connected in series to the electric drive heat exchange circuit 101, and are located between the water outlet M of the heat exchanger 2 and the inlet of the electric drive water pump 3, and then connected to the inlet of the electric drive water pump 3 through the third interface C of the first three-way pipe 13 to form the battery heat exchange circuit 102. The third interface C of the second three-way pipe 14 is connected to the outlet of the radiator 11, so that the radiator 11 can be connected in series with the electric drive water pump 3 and the drive motor 1 in sequence to form the electric drive heat dissipation cooling circuit 105, and the radiator 11 can be connected to the battery water pump 4 through the second three-way pipe 14 and the first three-way pipe 13 to form the battery heat dissipation cooling circuit 106.

[0088] Optionally, the thermal management system also includes a third three-way pipe 15, a fourth three-way pipe 16 and a fifth three-way pipe 17 connected in the air-conditioning cooling circuit 107, the third three-way pipe 15 and the fourth three-way pipe 16 are respectively connected in series in the pipeline between the outlet of the drive motor 1 and the inlet of the heater core 6, the fifth three-way pipe 17 is connected in series in the pipeline between the water outlet V of the condenser 8 and the inlet of the radiator 11, and the third interface C of the third three-way pipe 15 is respectively connected to the inlet of the radiator 11 and the inlet of the heat exchanger 2, and the third interface C of the fourth three-way pipe 16 is connected to the third interface C of the fifth three-way pipe 17.

[0089] Specifically, Figure 5 As shown, the first interface A of the third three-way pipe 15 is connected to the outlet of the drive motor 1, the second interface B of the third three-way pipe 15 is connected to the first interface A of the fourth three-way pipe 16, the second interface B of the fourth three-way pipe 16 is connected to the inlet of the heater core 6, the outlet of the heater core 6 is connected to the water inlet U of the condenser 8, the water outlet V of the condenser 8 is connected to the first interface A of the fifth three-way pipe 17, and the second interface B of the fifth three-way pipe 17 is connected to the inlet of the radiator 11, thereby forming an air conditioning cooling circuit 107. Figure 2 , Figure 4 and Figure 6 As shown, the third interface C of the fourth three-way pipe 16 is connected to the third interface C of the fifth three-way pipe 17, so that the fourth three-way pipe 16, the heater core 6, the heater water pump 7, the condenser 8 and the fifth three-way pipe 17 are sequentially connected in series to form the above-mentioned heater water path 103. The heater water path 103 can be used for heating the passenger compartment, and the air conditioning cooling circuit 107 can be used to realize the radiator 11 to assist air conditioning cooling.

[0090] In a specific implementation, other three-way pipes may be provided to connect different pipelines, for example Figure 6 In the embodiment, the sixth three-way pipe 18 and the seventh three-way pipe 19 can be used to realize the conduction of the warm air water path 103 and the warm air heating water path 104 respectively.

[0091] In some embodiments, Figure 2 As shown, a first check valve 20 or a first stop valve and a second check valve 21 are provided on the pipeline between the outlet of the battery pack 5 and the third valve port c of the five-way valve 12. When the five-way valve 12 is in the third flow state, the second valve port b, the third valve port c and the fourth valve port d are connected, and the first valve port a and the fifth valve port e are not connected to each other. In order to ensure that the coolant is heat-exchanged by the drive motor 1 after passing through the heat exchanger 2 or the battery pack 5 is heated by the battery heating water circuit, a first check valve 20 is provided on the pipeline between the outlet of the battery pack 5 and the third valve port c of the five-way valve 12, so that the coolant flowing out of the drive motor 1 cannot flow from the second valve port b to the third valve port c and enter the pipeline of the battery pack 5, but can only flow through the second valve port b to the fourth valve port d connected to the water inlet M of the heat exchanger 2, and utilize the motor waste heat of the drive motor 1 for waste heat utilization; or the coolant can only circulate in the battery heat exchange water circuit 102, to ensure the reliability of the waste heat utilization of the motor and / or battery.

[0092] A second one-way valve 21 or a second stop valve is provided on the pipeline between the water outlet of the condenser 8 and the inlet of the heater core 6; the second one-way valve 21 or the second stop valve is used to control the flow direction of the coolant in the heater water circuit 10. The coolant can only flow from the condenser 8 to the heater core 6 and cannot flow in the opposite direction, thereby ensuring the accuracy of the liquid flow direction.

[0093] In specific implementation, one-way valves or stop valves may also be provided on other pipelines, for example Figure 6 In the embodiment, a one-way valve may be provided on the water inlet pipeline of the condenser 8 and the water inlet pipeline of the heater 10 respectively to accurately control the flow direction of the liquid.

[0094] The thermal management system of the electric vehicle further includes an overflow tank 22, the inlet of which is respectively connected to the outlet of the drive motor 1, the outlet of the battery pack 5 and the water outlet of the condenser 8, and the outlet of the overflow tank 22 is connected to the inlet of the radiator 11. The overflow tank 20 is used to provide coolant to the heat exchanger 2, the condenser 8 and the radiator 11, or to recover coolant.

[0095] In some embodiments, the position and number of the overflow tank 22 can be changed according to demand; the overflow tank 22 can be set in parallel with the radiator 11, or in series with the radiator 11; the number of water inlets and outlets of the overflow tank 22 can be adjusted according to usage requirements.

[0096] If other components require cooling, they can be placed in any position in this embodiment according to specific heat exchange requirements while maintaining the functions of the above-mentioned thermal management system.

[0097] The second embodiment of the utility model provides an electric vehicle, including the above-mentioned thermal management system of an electric vehicle. The electric vehicle is preferably a pure electric vehicle, which can fully recycle the waste heat of the motor and / or battery of the electric vehicle to meet the requirements of new energy vehicles using clean energy and zero emissions; and can use the waste heat of the motor to heat the battery to improve the thermal performance of the battery; in addition, the radiator 11 can also be used to assist the cooling of the air conditioning system to reduce cooling energy consumption, etc.

[0098] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0099] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0100] In the description of the present invention, "plurality" means two or more.

[0101] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0102] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0103] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A thermal management system for an electric vehicle, characterized in that: include: An electrically driven water exchange circuit comprises a drive motor, a heat exchanger and an electrically driven water pump which are sequentially connected in series to form a loop; A battery water exchange circuit, comprising the heat exchanger, the battery water pump and the battery pack which are sequentially connected in series to form a loop; A heating water circuit, comprising a heating core, a heating water pump and a condenser which are sequentially connected in series to form a loop; A refrigerant pipeline, comprising the heat exchanger and the condenser connected in series in sequence; A control valve is arranged at the connection between the electric drive water exchange circuit and the battery water exchange circuit to make at least one of the electric drive water exchange circuit and the battery water exchange circuit conductive, and then exchange heat with the warm air water circuit through the refrigerant pipeline; or make the electric drive water exchange circuit and the battery water exchange circuit conductive to form a battery heating water circuit.

2. A thermal management system for an electric vehicle according to claim 1, characterized in that: The thermal management system of the electric vehicle further includes a heater; The heater is connected in series in the warm air water path, the inlet of the heater is connected to the outlet of the condenser, and the outlet of the heater is connected to the inlet of the warm air core; or The heater is connected in parallel with the condenser, and the heater, the warm air core, and the warm air water pump are sequentially connected in series to form a warm air heating water circuit.

3. The thermal management system of an electric vehicle according to claim 1, characterized in that: The thermal management system of the electric vehicle also includes a radiator, the inlet of the radiator is respectively connected to the outlet of the drive motor and the outlet of the battery pack, and the outlet of the radiator is respectively connected to the inlet of the electric drive water pump and the inlet of the battery water pump, so that the radiator, the electric drive water pump and the drive motor are connected in series in sequence to form an electric drive heat dissipation cooling circuit, the radiator, the battery water pump and the battery pack are connected in series in sequence to form a battery heat dissipation cooling circuit, and the control valve is arranged at the connection between the electric drive heat dissipation cooling circuit and the battery heat dissipation cooling circuit.

4. A thermal management system for an electric vehicle according to claim 3, characterized in that: The outlet of the drive motor is also connected to the inlet of the heater core, and the outlet of the condenser is also connected to the inlet of the radiator, so that the radiator, electric water pump, drive motor, heater core, heater water pump and condenser are connected in series in sequence to form an air-conditioning cooling circuit, and the control valve is arranged on the pipeline between the outlet of the condenser and the inlet of the radiator, or on the pipeline between the outlet of the drive motor and the inlet of the heater core.

5. A thermal management system for an electric vehicle according to claim 4, characterized in that: The control valve includes a five-way valve, which includes a first valve port, a second valve port, a third valve port, a fourth valve port and a fifth valve port, the inlet of the radiator is connected to the first valve port, the outlet of the drive motor is connected to the second valve port, the outlet of the battery pack is connected to the third valve port, the water inlet of the heat exchanger is connected to the fourth valve port, and the outlet of the condenser is connected to the fifth valve port; The five-way valve has four flow states. When the five-way valve is in the first flow state, the first valve port and the second valve port are connected, and the third valve port and the fourth valve port are connected, so that the electric drive heat dissipation cooling circuit and the battery heat exchange water circuit are connected respectively; when the five-way valve is in the second flow state, the first valve port and the fifth valve port are connected, and the third valve port and the fourth valve port are connected, so that the air conditioning cooling circuit is connected; when the five-way valve is in the third flow state, the second valve port, the third valve port and the fourth valve port are connected, and the first valve port and the fifth valve port are not connected to each other, so that at least one of the electric drive heat exchange water circuit and the battery heat exchange water circuit is connected, or the battery heating water circuit is connected; when the five-way valve is in the fourth flow state, the first valve port, the second valve port and the third valve port are connected, and the fourth valve port and the fifth valve port are not connected to each other, so that the electric drive heat dissipation cooling circuit and the battery heat dissipation cooling circuit are connected respectively.

6. A thermal management system for an electric vehicle according to claim 3, characterized in that: The thermal management system also includes a first three-way pipe and a second three-way pipe, which are connected in series in the electric drive water exchange circuit between the heat exchanger and the electric drive water pump, and the third interface of the first three-way pipe is connected to the inlet of the electric drive water pump, and the third interface of the second three-way pipe is connected to the outlet of the radiator.

7. A thermal management system for an electric vehicle according to claim 4, characterized in that: The thermal management system also includes a third three-way pipe, a fourth three-way pipe and a fifth three-way pipe connected in the air-conditioning cooling circuit, the third three-way pipe and the fourth three-way pipe are respectively connected in series on the pipeline between the outlet of the drive motor and the inlet of the heater core, the fifth three-way pipe is connected in series on the pipeline between the water outlet of the condenser and the inlet of the radiator, and the third interface of the third three-way pipe is respectively connected to the inlet of the radiator and the inlet of the heat exchanger, and the third interface of the fourth three-way pipe is connected to the third interface of the fifth three-way pipe.

8. The thermal management system of an electric vehicle according to claim 5, characterized in that: A first one-way valve or a first stop valve is provided on the pipeline between the outlet of the battery pack and the third valve port; A second one-way valve or a second stop valve is arranged on the pipeline between the water outlet of the condenser and the inlet of the warm air core.

9. The thermal management system of an electric vehicle according to claim 3, characterized in that: The thermal management system of the electric vehicle also includes an overflow tank, the inlet of which is respectively connected to the outlet of the drive motor, the outlet of the battery pack and the outlet of the condenser, and the outlet of the overflow tank is connected to the inlet of the radiator.

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

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