Electric vehicle thermal management system and vehicle

Abstract

The present invention relates to the field of vehicle technology, and specifically discloses an electric vehicle thermal management system and a vehicle. The electric vehicle thermal management system includes a battery cooling subsystem and an interior cooling subsystem. When the interior of the passenger compartment and the battery need to be heated at the same time, the battery cooling subsystem and the interior cooling subsystem can each work and adjust independently, or only one of the first heater and the second heater can be started. When the second heater is started, the first interface, the second interface, and the third interface of the first valve are connected in pairs, and the first liquid pump and the second liquid pump are both turned on. At this time, a part of the medium flowing out of the first heater enters the first radiator, and the other part enters the battery, thereby achieving simultaneous heating of the passenger compartment and the battery. Therefore, the electric vehicle thermal management system has a strong mutual coordination ability, and can make full use of the residual heat of each subsystem to improve the cooling and heating capabilities of each subsystem of the electric vehicle.

Description

Technical Field

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

[0002] Electric vehicles do not consume traditional fossil energy, thus achieving zero pollution during driving.

[0003] For existing electric vehicle thermal management systems, the ability to coordinate with each other is poor, and the residual heat of each subsystem cannot be fully utilized. As a result, when extreme weather requires heat dissipation, there is insufficient cooling capacity; when heating is required, there is insufficient heating capacity, which has a great impact on the stability and comfort of electric vehicles. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric vehicle thermal management system and vehicle to solve the problem that the existing electric vehicle thermal management systems in the relevant technology have poor mutual coordination capabilities and cannot fully utilize the residual heat of each subsystem, resulting in insufficient cooling capacity and insufficient heating capacity.

[0005] In one aspect, the present invention provides an electric vehicle thermal management system, comprising:

[0006] The battery cooling subsystem includes a first cooler, a first heater, a first liquid pump, a first compressor, and a first condenser. The first medium outlet of the first cooler is used to communicate with the coolant inlet of the battery. The coolant outlet of the battery is communicated with the inlet of the first liquid pump. The outlet of the first liquid pump is communicated with the inlet of the first heater. The outlet of the first heater is communicated with the first medium inlet of the first cooler. The inlet of the first condenser is communicated with the second medium outlet of the first cooler. The outlet of the first condenser, the first compressor, and the second medium inlet of the first cooler are communicated in sequence.

[0007] The indoor cooling subsystem includes a first radiator, a second heater, a first valve, and a second liquid pump. The liquid outlet of the second heater is respectively connected to the liquid inlet of the first radiator and the coolant inlet of the battery. The liquid outlet of the first radiator is connected to the first interface of the first valve, the second interface of the first valve is connected to the liquid inlet of the second liquid pump, the third interface of the first valve is connected to the coolant outlet of the battery, and the liquid outlet of the second liquid pump is connected to the liquid inlet of the second heater.

[0008] As a preferred technical solution of the electric vehicle thermal management system, the indoor cooling subsystem further includes a second compressor, a second cooler, and a heat exchanger, wherein the first medium inlet of the heat exchanger is connected to the liquid outlet of the second liquid pump, the first medium outlet of the heat exchanger is connected to the liquid inlet of the second heater, the second medium outlet of the heat exchanger is connected to the first medium inlet of the second cooler, the first medium outlet of the second cooler is connected to the liquid inlet of the second compressor, and the liquid outlet of the second compressor is connected to the second medium inlet of the heat exchanger;

[0009] The battery cooling subsystem also includes a second valve and a third valve, the first interface of the second valve is connected to the liquid outlet of the first heater, the second interface of the second valve is connected to the second medium inlet of the second cooler, the first interface of the third valve is connected to the first medium inlet of the first cooler, the second interface of the third valve is connected to the second medium outlet of the second cooler, and the third interface of the second valve is connected to the third interface of the third valve.

[0010] As an optimal technical solution for the thermal management system of an electric vehicle, the battery cooling subsystem also includes a fourth valve, the first interface and the second interface of the fourth valve are respectively connected to the first interface of the third valve and the first medium inlet of the first cooler, and the third interface of the fourth valve is connected to the liquid inlet of the first liquid pump.

[0011] As an optimal technical solution for the thermal management system of an electric vehicle, the indoor cooling subsystem also includes a fifth valve and a second condenser, the first interface of the fifth valve being connected to the first medium inlet of the second cooler, the second interface of the fifth valve being connected to the liquid inlet of the second condenser, the third interface of the fifth valve being connected to the liquid outlet of the second condenser, and the fourth interface of the fifth valve being connected to the first medium outlet of the heat exchanger.

[0012] As an optimal technical solution for the thermal management system of an electric vehicle, the indoor cooling subsystem also includes a sixth valve, the first interface of the sixth valve is connected to the liquid outlet of the second condenser, the second interface of the sixth valve is connected to the liquid inlet of the second compressor, and the third interface of the sixth valve is connected to the first medium outlet of the second cooler.

[0013] As an optimal technical solution for the thermal management system of an electric vehicle, the indoor cooling subsystem also includes a refrigerator, a seventh valve, an eighth valve and a one-way valve. The liquid inlet of the refrigerator is connected to the first interface of the seventh valve, the second interface of the seventh valve is connected to the pipeline between the fifth valve and the second cooler, the liquid outlet of the refrigerator is connected to the liquid inlet of the one-way valve, the liquid outlet of the one-way valve is connected to the pipeline between the sixth valve and the second cooler, and the eighth valve controls the opening of the first medium inlet of the second cooler.

[0014] As an optimal technical solution for the thermal management system of an electric vehicle, it also includes a motor cooling subsystem, including a third liquid pump and a second radiator, the liquid outlet of the third liquid pump is connected to the fourth interface of the second valve, the fourth interface of the third valve is connected to the liquid inlet of the motor, the liquid outlet of the motor is connected to the liquid inlet of the second radiator, and the liquid outlet of the second radiator is connected to the liquid inlet of the third liquid pump.

[0015] As an optimal technical solution for the thermal management system of an electric vehicle, the motor cooling subsystem also includes a ninth valve, the first interface and the second interface of the ninth valve are respectively connected to the liquid inlet of the third liquid pump and the liquid outlet of the second radiator, and the third interface of the ninth valve is connected to the pipeline between the motor and the second radiator.

[0016] As an optimal technical solution for the thermal management system of an electric vehicle, a fan is also included, and the second condenser, the second radiator and the fan are stacked in sequence.

[0017] In another aspect, the present invention provides a vehicle comprising the electric vehicle thermal management system according to any of the above schemes.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides an electric vehicle thermal management system and a vehicle, the electric vehicle thermal management system includes a battery cooling subsystem and an indoor cooling subsystem, the battery cooling subsystem includes a first cooler, a first heater, a first liquid pump, a first compressor and a first condenser, the first medium outlet of the first cooler is used to communicate with the coolant inlet of the battery, the coolant outlet of the battery is communicated with the inlet of the first liquid pump, the outlet of the first liquid pump is communicated with the inlet of the first heater, and the outlet of the first heater is communicated with the first medium inlet of the first cooler; the inlet of the first condenser is communicated with the second medium outlet of the first cooler, and the outlet of the first condenser, the first compressor and the second medium inlet of the first cooler are communicated in sequence; the indoor cooling subsystem includes a first radiator, a second heater, a first valve and a second liquid pump, the outlet of the second heater is respectively communicated with the inlet of the first radiator and the coolant inlet of the battery, the outlet of the first radiator is communicated with the first interface of the first valve, the second interface of the first valve is communicated with the inlet of the second liquid pump, the third interface of the first valve is communicated with the coolant outlet of the battery, and the outlet of the second liquid pump is communicated with the inlet of the second heater. In this electric vehicle thermal management system, when only passenger compartment interior heating is required, the first valve connects the first and second interfaces, while the second pump and second heater are simultaneously turned on. The medium heated by the second heater then flows sequentially between the first radiator, the second pump, and the second heater, enabling the first radiator to heat the passenger compartment interior. When only battery heating is required, both the first heater and the first pump are activated. Cooling medium then flows between the first heater, the first cooler, the battery, and the first pump, heating the battery. When both the passenger compartment interior and the battery require heating, the battery cooling subsystem and the interior cooling subsystem operate independently, or only one of the first and second heaters can be activated. When the first heater is activated, the first and third interfaces of the first valve connect. The residual heat from the battery flows to the first radiator and then back to the battery coolant inlet, utilizing the residual heat from the battery cooling subsystem to heat the passenger compartment interior. When the second heater is activated, the first, second, and third interfaces of the first valve connect in pairs. With both the first and second liquid pumps turned on, some of the fluid flowing out of the first heater enters the first radiator, while the remaining fluid flows into the battery, thereby simultaneously heating the passenger compartment and the battery. In summary, this system exhibits strong coordination and fully utilizes the residual heat of each subsystem to enhance both cooling and heating capabilities of the electric vehicle's subsystems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 3 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0023] Figure 4 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 4 ;

[0024] Figure 5 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 5 ;

[0025] Figure 6 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 6 ;

[0026] Figure 7 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 7 ;

[0027] Figure 8 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 8 ;

[0028] Figure 9 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 9 ;

[0029] Figure 10 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 10 ;

[0030] Figure 11 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 10 one;

[0031] Figure 12 The structure of the electric vehicle thermal management system in the embodiment of the present invention is shown in FIG. Figure 10 two.

[0032] In the picture:

[0033] 100, battery; 200, motor;

[0034] 11. First cooler; 12. First heater; 13. First liquid pump; 14. First compressor; 15. First condenser; 16. Second valve; 17. Third valve; 18. Fourth valve;

[0035] 21. First radiator; 22. Second heater; 23. First valve; 24. Second liquid pump; 25. Second compressor; 26. Second cooler; 27. Heat exchanger; 28. Fifth valve; 29. ​​Second condenser; 30. Sixth valve; 31. Refrigerator; 32. Seventh valve; 33. Eighth valve; 34. One-way valve;

[0036] 41. Third liquid pump; 42. Second radiator; 43. Ninth valve;

[0037] 5. Fan. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The following describes embodiments of the present invention in detail. 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 only to explain the present invention and are not to be construed as limiting the present invention.

[0042] like Figures 1 to 12As shown, this embodiment provides an electric vehicle thermal management system, which includes a battery cooling subsystem and an indoor cooling subsystem. The battery cooling subsystem includes a first cooler 11, a first heater 12, a first liquid pump 13, a first compressor 14 and a first condenser 15. The first medium outlet of the first cooler 11 is used to communicate with the coolant inlet of the battery 100, the coolant outlet of the battery 100 is communicated with the inlet of the first liquid pump 13, the outlet of the first liquid pump 13 is communicated with the inlet of the first heater 12, and the outlet of the first heater 12 is communicated with the first medium inlet of the first cooler 11; the inlet of the first condenser 15 is connected to the inlet of the first cooler 11 The second medium outlet is connected, and the liquid outlet of the first condenser 15, the first compressor 14 and the second medium inlet of the first cooler 11 are connected in sequence; the indoor cooling subsystem includes a first radiator 21, a second heater 22, a first valve 23 and a second liquid pump 24, the liquid outlet of the second heater 22 is respectively connected with the liquid inlet of the first radiator 21 and the coolant inlet of the battery 100, the liquid outlet of the first radiator 21 is connected with the first interface of the first valve 23, the second interface of the first valve 23 is connected with the liquid inlet of the second liquid pump 24, the third interface of the first valve 23 is connected with the coolant outlet of the battery 100, and the liquid outlet of the second liquid pump 24 is connected with the liquid inlet of the second heater 22. In this electric vehicle thermal management system, when only the passenger compartment interior needs to be heated, the first valve 23 is simply connected to the first and second interfaces, while the second liquid pump 24 and second heater 22 are simultaneously turned on. At this point, the medium heated by the second heater 22 flows sequentially between the first radiator 21, the second liquid pump 24, and the second heater 22, thereby enabling the first radiator 21 to heat the passenger compartment interior. When only the battery 100 needs to be heated, both the first heater 12 and the first liquid pump 13 are activated. At this point, the cooling medium flows between the first heater 12, the first cooler 11, the battery 100, and the first liquid pump 13, thereby heating the battery 100. When both the passenger compartment interior and the battery 100 need to be heated, the battery cooling subsystem and the interior cooling subsystem operate independently, or only one of the first heater 12 or the second heater 22 can be activated. When the first heater 12 is activated, the first and third interfaces of the first valve 23 are connected. At this time, the medium with residual temperature flowing out of the battery 100 will flow to the first radiator 21, and then flow back to the coolant inlet of the battery 100, thereby using the residual temperature of the medium in the battery cooling subsystem to heat the interior of the passenger compartment. When the second heater 22 is activated, the first, second, and third interfaces of the first valve 23 are connected in pairs. And the first liquid pump 13 and the second liquid pump 24 are both turned on. At this time, part of the medium flowing out of the first heater 12 enters the first radiator 21, and the other part enters the battery 100, thereby achieving simultaneous heating of the passenger compartment and the battery 100.In summary, this system has strong mutual coordination capabilities and can make full use of the residual heat of each subsystem to improve the cooling and heating capabilities of each subsystem of the electric vehicle.

[0043] In addition, the liquid inlet of the first condenser 15 is connected to the second medium outlet of the first cooler 11, and the liquid outlet of the first condenser 15, the first compressor 14, and the second medium inlet of the first cooler 11 are sequentially connected. In this embodiment, the first condenser 15, the first compressor 14, and the first cooler 11 are sequentially connected to form a circulation loop. This arrangement enables heat exchange between the first cooler 11 and the medium in the liquid path where the battery 100 is located, thereby removing heat generated by the battery 100 and cooling the battery 100.

[0044] Optionally, the indoor cooling subsystem also includes a second compressor 25, a second cooler 26 and a heat exchanger 27, the first medium inlet of the heat exchanger 27 is connected to the liquid outlet of the second liquid pump 24, the first medium outlet of the heat exchanger 27 is connected to the liquid inlet of the second heater 22, the second medium outlet of the heat exchanger 27 is connected to the first medium inlet of the second cooler 26, the first medium outlet of the second cooler 26 is connected to the liquid inlet of the second compressor 25, and the liquid outlet of the second compressor 25 is connected to the second medium inlet of the heat exchanger 27; the battery cooling subsystem also includes a second valve 16 and a third valve 17, the first interface of the second valve 16 is connected to the liquid outlet of the first heater 12, the second interface of the second valve 16 is connected to the second medium inlet of the second cooler 26, the first interface of the third valve 17 is connected to the first medium inlet of the first cooler 11, the second interface of the third valve 17 is connected to the second medium outlet of the second cooler 26, and the third interface of the second valve 16 is connected to the third interface of the third valve 17. In this embodiment, when the battery cooling subsystem works independently, the first port and the third port of the second valve 16 are in communication, and the first port and the third port of the third valve 17 are in communication.

[0045] When it is necessary to heat the passenger compartment and the battery 100 at the same time, the first interface and the second interface of the first valve 23 are connected, the first interface and the second interface of the second valve 16 are connected, the first interface and the second interface of the third valve 17 are connected, and the first liquid pump 13 and the second liquid pump 24 are both started. At this time, the medium heated by the first heater 12 flows through the second cooler 26 and the first cooler 11 in turn and then enters the battery 100. The medium flowing out of the battery 100 flows through the first liquid pump 13 and the first heater 12 in turn to achieve circulation. When the medium flows through the second cooler 26, the second cooler 26 realizes heat exchange, thereby achieving primary heating of the medium in the circulation loop composed of the second cooler 26, the second compressor 25 and the heat exchanger 27. Subsequently, the second compressor 25 compresses the medium, and heat is generated during the compression process, thereby achieving secondary heating of the medium in the circulation loop composed of the second cooler 26, the second compressor 25 and the heat exchanger 27 to reach a temperature for heating the passenger compartment. During this process, the heat exchanger 27 realizes heat exchange, thereby heating the medium in the loop composed of the first radiator 21, the second liquid pump 24 and the second heater 22, thereby ultimately achieving heating of the passenger compartment.

[0046] Optionally, the battery cooling subsystem further includes a fourth valve 18, wherein the first and second interfaces of the fourth valve 18 are respectively connected to the first interface of the third valve 17 and the first medium inlet of the first cooler 11, and the third interface of the fourth valve 18 is connected to the liquid inlet of the first liquid pump 13. In this embodiment, the above arrangement has two functions. On the one hand, Figure 8 As shown, when the flow rate of the medium flowing out of the second cooler 26 is too large, it is easy to cause damage to the downstream first cooler 11 and the battery 100. The first interface, the second interface and the third interface of the fourth valve 18 are connected in pairs to enable part of the medium to flow directly to the liquid inlet of the first liquid pump 13, thereby playing the role of overflow protection.

[0047] On the other hand: Figure 3As shown, when the passenger compartment is heated by the first heater 12, the first interface and the second interface of the first valve 23 are connected, the first interface and the second interface of the second valve 16 are connected, the first interface and the second interface of the third valve 17 are connected, the first interface and the third interface of the fourth valve 18 are connected, and the first liquid pump 13 and the second liquid pump 24 are both started. At this time, the medium heated by the first heater 12 flows back to the first heater 12 through the second cooler 26 and the first liquid pump 13 to achieve circulation. When the medium flows through the second cooler 26, the second cooler 26 realizes heat exchange, thereby achieving primary heating of the medium in the circulation loop composed of the second cooler 26, the second compressor 25 and the heat exchanger 27. Subsequently, the second compressor 25 compresses the medium, and heat is generated during the compression process, thereby achieving secondary heating of the medium in the circulation loop composed of the second cooler 26, the second compressor 25 and the heat exchanger 27 to reach a temperature for heating the passenger compartment. During this process, the heat exchanger 27 realizes heat exchange, thereby heating the medium in the loop composed of the first radiator 21, the second liquid pump 24 and the second heater 22, thereby ultimately achieving heating of the passenger compartment.

[0048] Optionally, the indoor cooling subsystem further includes a fifth valve 28 and a second condenser 29. The first interface of the fifth valve 28 is connected to the first medium inlet of the second cooler 26, the second interface of the fifth valve 28 is connected to the liquid inlet of the second condenser 29, the third interface of the fifth valve 28 is connected to the liquid outlet of the second condenser 29, and the fourth interface of the fifth valve 28 is connected to the first medium outlet of the heat exchanger 27. In this embodiment, when the first and fourth interfaces of the fifth valve 28 are connected, the second cooler 26, the heat exchanger 27, and the second compressor 25 are sequentially connected to form a ring loop.

[0049] When the first and second ports of the fifth valve 28 are connected, and the third and fourth ports are connected, the second cooler 26, the second condenser 29, the heat exchanger 27, and the second compressor 25 are sequentially connected to form a ring loop. Heat exchange in the heat exchanger 27 is then achieved through the second condenser 29 and the second compressor 25.

[0050] Optionally, the indoor cooling subsystem further includes a sixth valve 30, a first port of the sixth valve 30 being connected to the liquid outlet of the second condenser 29, a second port of the sixth valve 30 being connected to the liquid inlet of the second compressor 25, and a third port of the sixth valve 30 being connected to the first medium outlet of the second cooler 26. In this embodiment, when the first port and the fourth port of the fifth valve 28 are connected, and the second port and the third port of the sixth valve 30 are connected, the second cooler 26, the heat exchanger 27, and the second compressor 25 are sequentially connected to form a ring loop.

[0051] When the second port and the fourth port of the fifth valve 28 are in communication, and the first port and the second port of the sixth valve 30 are in communication, the heat exchanger 27 , the second condenser 29 and the second compressor 25 form a ring loop.

[0052] Optionally, the interior cooling subsystem further includes a chiller 31, a seventh valve 32, an eighth valve 33, and a one-way valve 34. The liquid inlet of the chiller 31 is connected to the first interface of the seventh valve 32, the second interface of the seventh valve 32 is connected to the pipeline between the fifth valve 28 and the second cooler 26, the liquid outlet of the chiller 31 is connected to the liquid inlet of the one-way valve 34, the liquid outlet of the one-way valve 34 is connected to the pipeline between the sixth valve 30 and the second cooler 26, and the eighth valve 33 controls the opening of the first medium inlet of the second cooler 26. In this embodiment, the first and second interfaces of the fifth valve 28 are connected, the third interface is connected to the fourth interface, and the second interface of the sixth valve 30 is connected to the third interface. The sixth valve 30 closes the first medium inlet of the second cooler 26 via the eighth valve 33, and the first and second interfaces of the seventh valve 32 are connected. This achieves a series connection of the second condenser 29, the chiller 31, the one-way valve 34, the second compressor 25, and the heat exchanger 27 to form a ring circuit to cool the passenger compartment.

[0053] Optionally, the electric vehicle thermal management system further includes a motor cooling subsystem, which includes a third liquid pump 41 and a second radiator 42. The liquid outlet of the third liquid pump 41 is connected to the fourth interface of the second valve 16, and the fourth interface of the third valve 17 is connected to the liquid inlet of the motor 200. The liquid outlet of the motor 200 is connected to the liquid inlet of the second radiator 42, and the liquid outlet of the second radiator 42 is connected to the liquid inlet of the third liquid pump 41. In this embodiment, by connecting the third interface and the fourth interface of the second valve 16, and connecting the third interface and the fourth interface of the third valve 17, the motor 200, the second radiator 42, and the third liquid pump 41 are connected in series to form an annular liquid circuit to dissipate heat from the motor 200.

[0054] By connecting the second interface and the fourth interface of the second valve 16, and connecting the second interface and the fourth interface of the third valve 17, the motor 200, the second radiator 42, the third liquid pump 41 and the second cooler 26 are connected in series to form a ring liquid circuit. At this time, the second cooler 26 can use the residual temperature of the medium in the circulating liquid circuit to achieve heat exchange to achieve temperature regulation inside the passenger compartment.

[0055] Optionally, the motor cooling subsystem further includes a ninth valve 43, wherein a first interface and a second interface of the ninth valve 43 are respectively connected to the liquid inlet of the third liquid pump 41 and the liquid outlet of the second radiator 42, and a third interface of the ninth valve 43 is connected to the pipeline between the motor 200 and the second radiator 42. In this embodiment, when the first interface and the second interface are connected, the second radiator 42 is connected in series with the motor cooling subsystem. When the first interface and the third interface are connected, the second radiator 42 is short-circuited, and heat generated by the motor 200 is directly exchanged through the medium at the location of the second cooler 26.

[0056] Optionally, the electric vehicle thermal management system further includes a fan 5, and the second condenser 29, the second radiator 42, and the fan 5 are stacked in sequence. In this embodiment, the air blown by the fan 5 acts on the second condenser 29 and the second radiator 42 simultaneously, eliminating one fan 5, thereby saving cost and layout space.

[0057] The electric vehicle thermal management system cites the following modes:

[0058] When only the passenger compartment needs to be heated or cooled, the following modes are included:

[0059] Mode 1: The first interface and the second interface of the first valve 23 are connected, the second heater 22 and the second liquid pump 24 are started, and the interior of the passenger compartment is heated through the first radiator 21 .

[0060] Mode 2: If Figure 2 As shown, when the passenger compartment needs to be cooled, the first interface and the second interface of the seventh valve 32 are connected, the eighth valve 33 closes the first medium inlet of the second cooler 26, the second interface and the third interface of the sixth valve 30 are connected, the first interface and the second interface of the fifth valve 28 are connected, and the third interface and the fourth interface are connected, and the second compressor 25 works, and then the heat inside the passenger compartment can be taken away through the refrigerator 31 to cool the passenger compartment.

[0061] Mode 3: If Figure 3As shown, the first interface and the second interface of the first valve 23 are connected, the first interface and the second interface of the second valve 16 are connected, the first interface and the second interface of the third valve 17 are connected, the first interface and the third interface of the fourth valve 18 are connected, the first interface and the fourth interface of the fifth valve 28 are connected, the second interface and the third interface of the sixth valve 30 are connected, and the eighth valve 33 opens the first medium inlet of the second cooler 26, and the first liquid pump 13, the first heater 12, the second compressor 25 and the second liquid pump 24 are started. At this time, the medium heated by the first heater 12 enters the second cooler 26, and heat exchange occurs in the second cooler 26, thereby achieving primary heating of the medium in the liquid circuit where the second cooler 26, the second compressor 25 and the heat exchanger 27 are located. The second compressor 25 achieves secondary heating of the medium, and the secondary heated medium flows into the first radiator 21 to achieve heating in the passenger compartment.

[0062] Mode 4: If Figure 4 As shown, the first interface and the second interface of the first valve 23 are connected, the first interface and the second interface of the second valve 16 are connected, the first interface and the second interface of the third valve 17 are connected, the first interface and the second interface of the fourth valve 18 are connected, the first interface and the fourth interface of the fifth valve 28 are connected, and the second interface and the third interface of the sixth valve 30 are connected. The eighth valve 33 opens the first medium inlet of the second cooler 26, and the first liquid pump 13, the second compressor 25 and the second liquid pump 24 are started. At this time, the battery 100 transfers the heat generated to the medium in the battery cooling subsystem. The medium carrying the heat of the battery 100 enters the second cooler 26, and heat exchange occurs in the second cooler 26, thereby achieving primary heating of the medium in the liquid circuit where the second cooler 26, the second compressor 25 and the heat exchanger 27 are located. The second compressor 25 achieves secondary heating of the medium. The secondary heated medium flows into the first radiator 21 to achieve heating in the passenger compartment.

[0063] When only heating or cooling of the battery 100 is required, the following modes are included:

[0064] Mode 1: If Figure 2 As shown, the first interface and the third interface of the second valve 16 are connected, the first interface and the third interface of the third valve 17 are connected, the first interface and the second interface of the fourth valve 18 are connected, and the first liquid pump 13 and the second heater 22 are in operation, at which time the battery 100 can be heated; when the battery 100 needs to be cooled, the first interface and the third interface of the second valve 16 are in operation, the first interface and the third interface of the third valve 17 are in operation, the first interface and the second interface of the fourth valve 18 are in operation, the first liquid pump 13 and the first compressor 14 are in operation, and then the first cooler 11 undergoes heat exchange to take away the heat generated by the battery 100, thereby achieving heat dissipation of the battery 100.

[0065] Mode 2: If Figure 5 As shown, the first interface, the second interface and the third interface of the first valve 23 are all disconnected, the first interface and the second interface of the second valve 16 are connected, the first interface and the second interface of the third valve 17 are connected, the first interface and the second interface of the fourth valve 18 are connected, the first interface and the second interface of the fifth valve 28 are connected, the third interface and the fourth interface are connected, the second interface and the third interface of the sixth valve 30 are connected, the eighth valve 33 opens the first medium inlet of the second cooler 26, the first liquid pump 13, the first compressor 14 and the second compressor 25 are started, the first condenser 15, the first compressor 14 and the first cooler 11 form a circulating liquid circuit so that the first cooler 11 can achieve heat exchange, the second condenser 29, the second compressor 25 and the second cooler 26 form a circulating liquid circuit so that the second cooler 26 can achieve heat exchange, and the first cooler 11 and the second cooler 26 work together to take away the heat of the battery 100.

[0066] Mode 3: If Figure 6 As shown, the first interface, the second interface and the third interface of the first valve 23 are all disconnected, the first interface and the second interface of the second valve 16 are connected, the first interface and the second interface of the third valve 17 are connected, the first interface and the second interface of the fourth valve 18 are connected, the first interface and the second interface of the fifth valve 28 are connected, the third interface and the fourth interface are connected, the second interface and the third interface of the sixth valve 30 are connected, the eighth valve 33 opens the first medium inlet of the second cooler 26, the first liquid pump 13 and the second compressor 25 are started, the second condenser 29, the second compressor 25 and the second cooler 26 form a circulating liquid circuit so that the second cooler 26 can realize heat exchange, and the second cooler 26 forms a circulating liquid circuit with the battery 100 to take away the heat of the battery 100.

[0067] When the passenger compartment and the battery 100 need to be heated or cooled simultaneously, the following modes are included:

[0068] Mode 1: If Figure 7 As shown, the first, second, and third ports of the first valve 23 are connected in pairs, the first and third ports of the second valve 16 are connected, the first and third ports of the third valve 17 are connected, and the first and second ports of the fourth valve 18 are connected. The first liquid pump 13, the second liquid pump 24, and the second heater 22 are all activated. At this time, a portion of the medium heated by the second heater 22 enters the first radiator 21, thereby heating the passenger compartment. Another portion of the medium enters the circulating fluid circuit formed by the battery 100, the first liquid pump 13, the first heater 12, and the first cooler 11, thereby heating the battery 100. This mode is suitable for extremely cold operating conditions, with an ambient temperature t < -20°C.

[0069] Mode 2: If Figure 8As shown, the first and second interfaces of first valve 23 are connected, the first and second interfaces of second valve 16 are connected, the first and second interfaces of third valve 17 are connected, the first and second interfaces of fourth valve 18 are connected, the first and fourth interfaces of fifth valve 28 are connected, and the second and third interfaces of sixth valve 30 are connected. Eighth valve 33 opens the first medium inlet of second cooler 26. First liquid pump 13, second liquid pump 24, and first heater 12 are all activated. After first heater 12 heats the medium, the medium flows sequentially through second cooler 26 and battery 100, first heating battery 100. Heat exchange then occurs in second cooler 26, heating the medium in the circulation loop consisting of second cooler 26, second compressor 25, and heat exchanger 27. Simultaneously, heat exchange also occurs in heat exchanger 27, heating the medium flowing through first radiator 21, thereby heating the passenger compartment. This mode is suitable for cold start conditions with an ambient temperature t ≥ -20°C.

[0070] Mode 3: If Figure 9 As shown, the first port, the second port, and the third port of the first valve 23 are connected in pairs, the first port and the third port of the second valve 16 are connected, the first port and the third port of the third valve 17 are connected, the first port and the second port of the fourth valve 18 are connected, the second port and the fourth port of the fifth valve 28 are connected, and the first port and the second port of the sixth valve 30 are connected. The first liquid pump 13 and the second liquid pump 24 are both started. The medium absorbs heat from the environment through the second condenser 29 and enters the second compressor 25. After being compressed and heated, it enters the heat exchanger 27. The heat exchanger 27 performs heat exchange on the medium in the circuit where the second heater 22, the first radiator 21, and the second liquid pump 24 are located. Then, the second heater 22 performs a second heating on the medium. Part of the heated medium enters the first radiator 21 to heat the passenger compartment, and the other part enters the circulating liquid circuit where the first heater 12, the battery 100, the first liquid pump 13, and the first cooler 11 are located, thereby heating the medium in the circulating liquid circuit and ultimately heating the battery 100. This mode is suitable for heat pump working conditions, and the ambient temperature t≥-5℃.

[0071] Mode 4: If Figure 10As shown, the first interface, the second interface and the third interface of the first valve 23 are connected in pairs, the second interface and the fourth interface of the second valve 16 are connected, and the first interface and the third interface are connected, the second interface and the fourth interface of the third valve 17 are connected, and the first interface and the third interface are connected, the first interface and the second interface of the fourth valve 18 are connected, the first interface and the fourth interface of the fifth valve 28 are connected, the second interface and the third interface of the sixth valve 30 are connected, the eighth valve 33 opens the first medium inlet of the second cooler 26, the first interface and the third interface of the ninth valve 43 are connected, the first liquid pump 13, the second liquid pump 24 and the third liquid pump 41 are all started, when the battery 100 and the passenger compartment have heating requirements, and the medium temperature of the motor cooling subsystem exceeds the set threshold, the medium flow of the motor cooling subsystem The medium then flows into the second cooler 26, where heat exchange occurs, heating the medium in the circulating fluid circuit containing the second cooler 26, the second compressor 25, and the heat exchanger 27. The second compressor 25 then reheats the heated medium, which then flows into the heat exchanger 27. The heat exchanger 27 then exchanges heat with the medium in the circulating fluid circuit containing the second heater 22, the first radiator 21, and the second liquid pump 24. A portion of this medium flows into the first radiator 21, heating the passenger compartment, while the remaining portion enters the circulating fluid circuit containing the first heater 12, the battery 100, the first liquid pump 13, and the first cooler 11, heating the medium in this circulating fluid circuit and ultimately heating the battery 100. This mode is suitable for operating conditions where the medium temperature in the motor cooling subsystem exceeds a set threshold, and the ambient temperature t is ≥ -20°C.

[0072] Mode 5: If Figure 11As shown, the first interface and the second interface of the first valve 23 are connected, the second interface and the fourth interface of the second valve 16 are connected, and the first interface and the third interface are connected, the first interface and the second interface of the third valve 17 are connected, and the third interface and the fourth interface are connected, the first interface and the second interface of the fourth valve 18 are connected, the first interface and the second interface of the fifth valve 28 are connected, the second interface and the third interface of the sixth valve 30 are connected, the eighth valve 33 opens the first medium inlet of the second cooler 26, the first interface and the third interface of the ninth valve 43 are connected, the first liquid pump 13, the second liquid pump 24 and the third liquid pump 41 are all started, when the battery 100 and the passenger compartment have heating requirements, and the medium temperature of the motor cooling subsystem exceeds the set threshold, the medium of the motor cooling subsystem flows into the second cooler 26, the second cooler 26 undergoes heat exchange, and then the second cooler 26 and the second pressure The medium in the circulating fluid circuit containing compressor 25 and heat exchanger 27 is heated once. The second compressor 25 then reheats the heated medium. The reheated medium flows into heat exchanger 27, where it exchanges heat with the medium in the circulating fluid circuit containing second heater 22, first radiator 21, and second liquid pump 24. This medium then flows into first radiator 21, thereby heating the passenger compartment. The medium flowing out of second cooler 26 flows through the first and second ports of third valve 17 into the circulating fluid circuit containing first heater 12, battery 100, first liquid pump 13, and first cooler 11, thereby heating the medium in this circulating fluid circuit and ultimately heating battery 100. The heated medium from battery 100 then returns to the motor cooling subsystem through the third and fourth ports of third valve 17. This mode is suitable for operating conditions where the medium temperature in the motor cooling subsystem exceeds a set threshold, and the ambient temperature t is ≥ -20°C.

[0073] Mode 6: If Figure 12 As shown, the first, second, and third interfaces of the first valve 23 are all disconnected, the first and second interfaces of the second valve 16 are connected, the first and second interfaces of the third valve 17 are connected, the first and second interfaces of the fourth valve 18 are connected, the first and fourth interfaces of the fifth valve 28 are connected, the second and third interfaces of the sixth valve 30 are connected, and the first and second interfaces of the seventh valve 32 are connected. The eighth valve 33 opens the first medium inlet of the second cooler 26, and the first liquid pump 13, the second liquid pump 24, the first compressor 14, and the second compressor 25 are all started. At this time, the first radiator 21 cools the passenger compartment, while the first cooler 11 and the second cooler 26 exchange heat, thereby simultaneously cooling the medium in the circulating fluid circuit where the first heater 12, the battery 100, the first liquid pump 13, and the first cooler 11 are located, ultimately cooling the battery 100. This mode is suitable for cooling the battery 100 and the passenger compartment simultaneously.

[0074] This embodiment also provides a vehicle, including the electric vehicle thermal management system in the above solution.

[0075] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Electric vehicle thermal management system, characterized in that: include: A battery cooling subsystem comprises a first cooler (11), a first heater (12), a first liquid pump (13), a first compressor (14) and a first condenser (15), wherein a first medium outlet of the first cooler (11) is used to communicate with a coolant inlet of the battery (100), the coolant outlet of the battery (100) is communicated with a liquid inlet of the first liquid pump (13), the liquid outlet of the first liquid pump (13) is communicated with a liquid inlet of the first heater (12), and the liquid outlet of the first heater (12) is communicated with a first medium inlet of the first cooler (11); the liquid inlet of the first condenser (15) is communicated with a second medium outlet of the first cooler (11), and the liquid outlet of the first condenser (15), the first compressor (14) and the second medium inlet of the first cooler (11) are communicated in sequence; An indoor cooling subsystem comprises a first radiator (21), a second heater (22), a first valve (23) and a second liquid pump (24), wherein the liquid outlet of the second heater (22) is respectively connected to the liquid inlet of the first radiator (21) and the coolant inlet of the battery (100), the liquid outlet of the first radiator (21) is connected to the first interface of the first valve (23), the second interface of the first valve (23) is connected to the liquid inlet of the second liquid pump (24), the third interface of the first valve (23) is connected to the coolant outlet of the battery (100), and the liquid outlet of the second liquid pump (24) is connected to the liquid inlet of the second heater (22); The indoor cooling subsystem further includes a second compressor (25), a second cooler (26) and a heat exchanger (27), wherein a first medium inlet of the heat exchanger (27) is communicated with a liquid outlet of the second liquid pump (24), a first medium outlet of the heat exchanger (27) is communicated with a liquid inlet of the second heater (22), a second medium outlet of the heat exchanger (27) is communicated with a first medium inlet of the second cooler (26), a first medium outlet of the second cooler (26) is communicated with a liquid inlet of the second compressor (25), and a liquid outlet of the second compressor (25) is communicated with a second medium inlet of the heat exchanger (27); The battery cooling subsystem further includes a second valve (16) and a third valve (17), wherein a first interface of the second valve (16) is communicated with a liquid outlet of the first heater (12), a second interface of the second valve (16) is communicated with a second medium inlet of the second cooler (26), a first interface of the third valve (17) is communicated with a first medium inlet of the first cooler (11), a second interface of the third valve (17) is communicated with a second medium outlet of the second cooler (26), and a third interface of the second valve (16) is communicated with a third interface of the third valve (17); The electric vehicle thermal management system further includes a motor cooling subsystem, comprising a third liquid pump (41) and a second radiator (42), wherein the liquid outlet of the third liquid pump (41) is communicated with the fourth interface of the second valve (16), the fourth interface of the third valve (17) is communicated with the liquid inlet of the motor (200), the liquid outlet of the motor (200) is communicated with the liquid inlet of the second radiator (42), and the liquid outlet of the second radiator (42) is communicated with the liquid inlet of the third liquid pump (41); The motor cooling subsystem further includes a ninth valve (43), wherein a first interface and a second interface of the ninth valve (43) are respectively connected to a liquid inlet of the third liquid pump (41) and a liquid outlet of the second radiator (42), and a third interface of the ninth valve (43) is connected to a pipeline between the motor (200) and the second radiator (42).

2. The electric vehicle thermal management system according to claim 1, characterized in that: The battery cooling subsystem further comprises a fourth valve (18), wherein a first interface and a second interface of the fourth valve (18) are respectively connected to the first interface of the third valve (17) and the first medium inlet of the first cooler (11), and a third interface of the fourth valve (18) is connected to the liquid inlet of the first liquid pump (13).

3. The electric vehicle thermal management system according to claim 2, characterized in that: The indoor cooling subsystem further includes a fifth valve (28) and a second condenser (29), wherein a first interface of the fifth valve (28) is communicated with a first medium inlet of the second cooler (26), a second interface of the fifth valve (28) is communicated with a liquid inlet of the second condenser (29), a third interface of the fifth valve (28) is communicated with a liquid outlet of the second condenser (29), and a fourth interface of the fifth valve (28) is communicated with a first medium outlet of the heat exchanger (27).

4. The electric vehicle thermal management system according to claim 3, characterized in that: The indoor cooling subsystem further includes a sixth valve (30), a first interface of the sixth valve (30) being connected to the liquid outlet of the second condenser (29), a second interface of the sixth valve (30) being connected to the liquid inlet of the second compressor (25), and a third interface of the sixth valve (30) being connected to the first medium outlet of the second cooler (26).

5. The electric vehicle thermal management system according to claim 4, characterized in that: The indoor cooling subsystem further includes a refrigerator (31), a seventh valve (32), an eighth valve (33) and a one-way valve (34); the liquid inlet of the refrigerator (31) is connected to the first interface of the seventh valve (32); the second interface of the seventh valve (32) is connected to the pipeline between the fifth valve (28) and the second cooler (26); the liquid outlet of the refrigerator (31) is connected to the liquid inlet of the one-way valve (34); the liquid outlet of the one-way valve (34) is connected to the pipeline between the sixth valve (30) and the second cooler (26); and the eighth valve (33) controls the opening of the first medium inlet of the second cooler (26).

6. The electric vehicle thermal management system according to claim 3, characterized in that: It also includes a fan (5), and the second condenser (29), the second radiator (42) and the fan (5) are stacked in sequence.

7. A vehicle, characterized in that The electric vehicle thermal management system includes any one of claims 1 to 6.

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