Vehicle thermal management system and vehicle

Abstract

The application provides a vehicle thermal management system and a vehicle. The battery thermal management circuit comprises a battery pack, a first interface of a seven-way valve connected to an outlet of the battery pack, and a second interface of the seven-way valve connected to an inlet of the battery pack. The electric drive thermal management circuit comprises a drive motor and a low-temperature radiator, a fifth interface of the seven-way valve connected to an outlet of the drive motor, and a fourth interface of the seven-way valve connected to an inlet of the drive motor. A sixth interface of the seven-way valve is connected to an inlet of the low-temperature radiator, and a third interface of the seven-way valve is connected to an outlet of the low-temperature radiator. A seventh interface of the seven-way valve is connected between the outlet of the low-temperature radiator and the third interface. The battery thermal management circuit is connected to a heating circuit through a water-water heat exchanger. The battery thermal management circuit is connected to an air conditioning refrigeration circuit through a battery cooling heat exchanger. A thermal management controller controls the on-off of each interface of the seven-way valve and the opening and closing of each circuit. The vehicle thermal management system and the vehicle of the application have simple pipeline arrangement and can save the space in the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle thermal management system and a vehicle. BACKGROUND

[0002] In response to the call of the country's carbon peak and carbon neutral, the automobile technology is moving towards low carbon and new energy, and various energy situations and structures are emerging. Among them, the electric trend is the mainstream direction of the current market. In the commercial vehicle field, considering energy saving, the vehicle thermal management scheme also becomes more complex. In order to realize the waste heat utilization function, the current thermal management system increases multiple heat exchangers and valve parts, increases the system cost and arrangement difficulty, and the heat exchange efficiency is poor and the energy utilization rate is low.

[0003] Therefore, it is necessary to provide an improved vehicle thermal management system and vehicle to solve the above problems. SUMMARY

[0004] The present application provides a vehicle thermal management system with simple pipeline arrangement.

[0005] The present application discloses a vehicle thermal management system, a battery thermal management loop, an electric drive thermal management loop, a heating loop, an air conditioning refrigeration loop, a water-water heat exchanger, a battery cooling heat exchanger, a seven-way valve and a thermal management controller.

[0006] The battery thermal management loop includes a battery pack, the liquid outlet of the battery pack is connected to the first interface of the seven-way valve, and the liquid inlet of the battery pack is connected to the second interface of the seven-way valve.

[0007] The electric drive thermal management loop includes a drive motor and a low-temperature radiator, the liquid outlet of the drive motor is connected to the fifth interface of the seven-way valve, the liquid inlet of the drive motor is connected to the fourth interface of the seven-way valve, the liquid inlet of the low-temperature radiator is connected to the sixth interface of the seven-way valve, the liquid outlet of the low-temperature radiator is connected to the third interface of the seven-way valve, and the seventh interface of the seven-way valve is connected between the liquid outlet of the low-temperature radiator and the third interface.

[0008] The battery thermal management loop and the heating loop are in thermal interaction through the water-water heat exchanger.

[0009] The battery thermal management loop and the air conditioning refrigeration loop are in thermal interaction through the battery cooling heat exchanger.

[0010] The thermal management controller is used to control the on-off of each interface of the seven-way valve and the opening and closing of each loop, so as to control the heat exchange in the vehicle thermal management system.

[0011] Further, the heating loop includes a PTC heater, a warm air core and a three-way valve, the warm air core is used to deliver warm air to the cab,

[0012] The first port of the three-way valve is connected to the liquid outlet of the PTC heater, the second port of the three-way valve is connected to the liquid inlet of the heating core, and the third port of the three-way valve is connected to the hot-side liquid inlet of the water-water heat exchanger.

[0013] The liquid outlet of the heating core is connected to the liquid inlet of the PTC heater, and the hot-side liquid outlet of the water-water heat exchanger is connected to the pipeline between the heating core and the PTC heater.

[0014] Further, when the battery pack has a heating demand and the cabin has no heating demand, the thermal management controller is configured to control the first port and the third port of the three-way valve to be in communication, and the second port to be closed, so that the PTC heater supplies heat to the battery pack.

[0015] When the battery pack and the cabin both have a heating demand, the thermal management controller is configured to control the first port of the three-way valve to be in communication with the second port and the third port respectively, so that the PTC heater supplies heat to the battery pack and the heating core simultaneously.

[0016] Further, a battery temperature sensor for detecting the temperature of the battery pack is arranged on the battery thermal management circuit, and the opening degree of each port of the three-way valve is adjustable, and the thermal management controller is configured to control the opening degree of the three-way valve according to the temperature of the battery pack.

[0017] Further, the seven-way valve, the three-way valve, the water-water heat exchanger, and the battery cooling heat exchanger are integrally arranged.

[0018] Further, a battery temperature sensor for detecting the temperature of the battery pack is arranged on the battery thermal management circuit, and the air conditioning refrigeration circuit includes a compressor,

[0019] When the temperature of the battery pack is greater than a first temperature threshold, the thermal management controller is configured to control the compressor to be turned on, and the battery thermal management circuit and the air conditioning refrigeration circuit exchange heat through the battery cooling heat exchanger.

[0020] When the temperature of the battery pack is less than a second temperature threshold, the thermal management controller is configured to control the compressor to be turned off.

[0021] Further, the water-water heat exchanger and the battery cooling heat exchanger are arranged between the battery pack and the first interface, the hot-side liquid inlet of the battery cooling heat exchanger is connected to the liquid outlet of the battery pack, the hot-side liquid outlet of the battery cooling heat exchanger is connected to the cold-side liquid inlet of the water-water heat exchanger, and the cold-side liquid outlet of the water-water heat exchanger is connected to the first interface.

[0022] The cold side of the battery cooling heat exchanger is connected to the air conditioning refrigeration circuit; and the hot side of the water-water heat exchanger is connected to the heating circuit.

[0023] Further, two electric drive temperature sensors are arranged on the electric drive thermal management circuit, and the two electric drive temperature sensors are respectively used to detect the temperatures at the liquid inlet and the liquid outlet of the drive motor.

[0024] Further, the thermal management controller is used to control the seven-way valve to adjust different working modes according to the temperature of the drive motor and the heating or refrigeration demand of the battery pack.

[0025] The seven-way valve includes the following working modes:

[0026] The first mode: the first interface and the second interface of the seven-way valve are in conduction, the third interface and the fourth interface are in conduction, and the fifth interface and the sixth interface are in conduction.

[0027] The second mode: the first interface and the second interface of the seven-way valve are in conduction, the third interface and the fourth interface are in conduction, and the fifth interface and the seventh interface are in conduction.

[0028] The third mode: the first interface and the fourth interface of the seven-way valve are in conduction, the second interface and the third interface are in conduction, and the fifth interface and the sixth interface are in conduction.

[0029] The fourth mode: the first interface and the fourth interface of the seven-way valve are in conduction, the second interface and the third interface are in conduction, and the fifth interface and the seventh interface are in conduction.

[0030] The application further discloses a vehicle comprising the vehicle thermal management system.

[0031] The vehicle thermal management system and the vehicle achieve heat exchange between the battery thermal management circuit, the electric drive thermal management circuit, the heating circuit and the air conditioning refrigeration circuit by arranging the seven-way valve, the water-water heat exchanger and the battery cooling heat exchanger, so as to meet different temperature demands and reduce heat waste. Meanwhile, the vehicle thermal management system has few components and simple pipeline arrangement, which is conducive to integrated design.

[0032] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments consistent with the present specification and serve to explain the principles of the present specification.

[0034] Figure 1 is a schematic diagram of a vehicle thermal management system of the present application.

[0035] Figure 2 is a perspective view of the vehicle thermal management system of the present application with some parts integrated on the manifold.

[0036] Figure 3 is a bottom view of Figure 2

[0037] BRIEF DESCRIPTION OF DRAWINGS: 100, battery thermal management circuit; 101, battery pack; 102, battery temperature sensor; 103, first electronic water pump; 200, electric drive thermal management circuit; 201, drive motor; 202, low-temperature radiator; 203, electric drive temperature sensor; 204, auxiliary drive controller; 205, second electronic water pump; 206, fan group; 300, heating circuit; 301, PTC heater; 302, heater core; 303, three-way valve; K, first port; H, second port; J, third port; 304, third electronic water pump; 400, air conditioning refrigeration circuit; 401, compressor; 402, evaporator; 403, outdoor heat exchanger; 404, thermal expansion valve; 405, electronic expansion valve; 406, stop valve; 407, liquid separator; 500, water-water heat exchanger; 600, battery cooling heat exchanger; 700, seven-way valve; A, first interface; B, second interface; C, third interface; D, fourth interface; E, fifth interface; F, sixth interface; G, seventh interface; 800, plate heat exchanger; 900, manifold; 901, coolant flow channel; 902, pipe opening. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments (or modes) of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0039] If the embodiments of the present application involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms “first”, “second”, etc. in the embodiments of the present application are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0040] Next, the embodiments of the present application will be described in detail. ​

[0041] As Figure 1 shown, the application provides a vehicle thermal management system, comprising a battery thermal management circuit 100, an electric drive thermal management circuit 200, a heating circuit 300, an air conditioning refrigeration circuit 400, a water-water heat exchanger 500, a battery cooling heat exchanger 600, a seven-way valve 700 and a thermal management controller.

[0042] The battery thermal management circuit 100 and the electric drive thermal management circuit 200 are connected through the seven-way valve 700. The battery thermal management circuit 100 and the heating circuit 300 are in thermal interaction through the water-water heat exchanger 500. The battery thermal management circuit 100 and the air conditioning refrigeration circuit 400 are in thermal interaction through the battery cooling heat exchanger 600. The thermal management controller is used to control the opening and closing of each interface of the seven-way valve 700 and the opening and closing of each circuit, so that the coolant circulates in different channels, thereby controlling the heat exchange in the vehicle thermal management system.

[0043] The battery thermal management circuit 100 comprises a battery pack 101, the outlet of the battery pack 101 is connected to the first interface A of the seven-way valve 700, and the inlet of the battery pack 101 is connected to the second interface B of the seven-way valve. In this embodiment, the battery pack 101 is formed by 6 batteries in parallel, which can provide sufficient power support during driving.

[0044] Further, the battery thermal management circuit 100 is further provided with a battery temperature sensor 102 and a first electronic water pump 103. The battery temperature sensor 102 is used to detect the temperature of the battery pack 101. Specifically, the number of battery temperature sensors 102 is two, which are respectively arranged at the inlet and outlet of the battery pack 101, for detecting the temperature of the inlet and outlet of the battery pack 101. The first electronic water pump 103 is used to pressurize the coolant in the battery thermal management circuit 100, to ensure the circulation of the coolant in the battery thermal management circuit 100, thereby transferring heat.

[0045] Further, the water-water heat exchanger 500 and the battery cooling heat exchanger 600 are arranged between the outlet of the battery pack 101 and the first interface A. The hot side of the water-water heat exchanger 500 is connected to the heating circuit 300, and the cold side is connected to the battery thermal management circuit 100. The hot side of the battery cooling heat exchanger 600 is connected to the battery thermal management circuit 100, and the cold side is connected to the air conditioning refrigeration circuit 400.

[0046] Specifically, the hot side inlet of the battery cooling heat exchanger 600 is connected to the outlet of the battery pack 101, the hot side outlet of the battery cooling heat exchanger 600 is connected to the cold side inlet of the water-water heat exchanger 500, and the cold side outlet of the water-water heat exchanger 500 is connected to the first interface A. The coolant flowing out of the battery pack 101 enters the seven-way valve 700 in turn through the battery cooling heat exchanger 600 and the water-water heat exchanger 500.

[0047] The electric drive thermal management circuit 200 comprises a drive motor 201 and a low-temperature radiator 202. The outlet of the drive motor 201 is connected to the fifth interface E of the seven-way valve 700. The inlet of the drive motor 201 is connected to the fourth interface D of the seven-way valve 700. The inlet of the low-temperature radiator 202 is connected to the sixth interface F of the seven-way valve 700. The outlet of the low-temperature radiator 202 is connected to the third interface C of the seven-way valve 700. The seventh interface G of the seven-way valve 700 is connected between the outlet of the low-temperature radiator 202 and the third interface C.

[0048] Further, the electric drive thermal management circuit 200 is further provided with an electric drive temperature sensor 203, an auxiliary drive controller 204, a second electronic water pump 205 and a fan group 206. The number of electric drive temperature sensors 203 is two, which are respectively used to detect the temperature at the inlet and outlet of the drive motor 201. Specifically, one of the electric drive temperature sensors 203 is arranged at the third interface C to detect the temperature at the inlet of the drive motor 201. The other electric drive temperature sensor 203 is arranged at the fifth interface E to detect the temperature at the outlet of the drive motor 201.

[0049] The auxiliary drive controller 204 is arranged in parallel with the drive motor 201. The cooling liquid from the fourth interface D flows into the inlet of the drive motor 201 and the inlet of the auxiliary drive controller 204 respectively, and then flows out from the outlet of the drive motor 201 and the outlet of the auxiliary drive controller 204 to form a flow into the fifth interface E.

[0050] The second electronic water pump 205 is used to pressurize the cooling liquid in the electric drive thermal management circuit 200, so as to ensure the circulation of the cooling liquid in the electric drive thermal management circuit 200, thereby performing heat transfer. The fan group 206 is used to accelerate the air flow at the low-temperature radiator 202, so as to assist the heat dissipation of the low-temperature radiator 202.

[0051] The heating circuit 300 comprises a PTC heater 301, a warm air core 302 and a three-way valve 303. The PTC heater 301 is used to heat and warm the cooling liquid circulating in the heating circuit 300. The warm air core 302 is used to deliver warm air to the cab.

[0052] The first port K of the three-way valve 303 is connected to the outlet of the PTC heater 301. The second port H of the three-way valve 303 is connected to the inlet of the warm air core 302. The third port J of the three-way valve 303 is connected to the hot side inlet of the water-water heat exchanger 500. The outlet of the warm air core 302 is connected to the inlet of the PTC heater 301, and the hot side outlet of the water-water heat exchanger 500 is connected to the pipeline between the warm air core 302 and the PTC heater 301.

[0053] The first port K is selectively communicated with the second port H or the third port J. When the first port K is communicated with the second port H and the third port J is disconnected, the PTC heater 301 supplies heat to the cabin through the heater core 302. The cooling liquid flowing out of the PTC heater 301 flows back to the PTC heater 301 through the first port K, the second port H and the heater core 302 in sequence.

[0054] When the first port K is communicated with the third port J and the second port H is disconnected, the PTC heater 301 supplies heat to the battery pack 101 through the water-water heat exchanger 500. The cooling liquid flowing out of the PTC heater 301 flows back to the PTC heater 301 through the first port K, the third port J and the water-water heat exchanger 500 in sequence.

[0055] The first port K can also be communicated with the second port H and the third port J at the same time. When the first port K is communicated with the second port H and the third port J at the same time, the PTC heater 301 supplies heat to the cabin and the battery pack 101 at the same time. The cooling liquid flowing out of the PTC heater 301 flows into the three-way valve 303 through the first port K, and flows back to the PTC heater 301 through the second port H and the heater core 302 in one way and through the third port J and the water-water heat exchanger 500 in the other way.

[0056] Further, the heating circuit 300 is also provided with a third electronic water pump 304. The third electronic water pump 304 is used to pressurize the cooling liquid in the heating circuit 300, and ensure the circulation of the cooling liquid in the heating circuit 300, so as to perform heat transfer.

[0057] When driving, the battery management system sends a battery thermal management request according to the temperature of the battery pack 101. The thermal management controller is used to control the opening and closing of the ports of the three-way valve 303 according to whether there is a heating demand for the battery pack 101 and the cabin.

[0058] When the battery pack 101 has a heating demand and the cabin has no heating demand, the battery management system sends a battery heating request, and the air conditioning control system has no heating request. After receiving the request from the battery management system, the thermal management controller controls the first electronic water pump 103 and the third electronic water pump 304 to start working, the first port K and the third port J of the three-way valve 303 are turned on, and the second port H is closed. The cooling liquid in the battery thermal management circuit 100 and the cooling liquid in the heating circuit 300 perform heat transfer in the water-water heat exchanger 500, and the PTC heater 301 supplies heat to the battery pack 101.

[0059] When the battery pack 101 has no heating demand and the cabin has a heating demand, the thermal management controller controls the first port K and the second port H of the three-way valve 303 to be turned on, and the third port J is closed. The PTC heater 301 supplies heat to the cabin through the heater core 302.

[0060] When both the battery pack 101 and the cabin have heating demand, the battery management system and the air conditioning control system both send battery heating request. After receiving the request from the battery management system and the air conditioning control system, the thermal management controller controls the first port K of the three-way valve 303 to be connected to the second port H and the third port J respectively, and the PTC heater 301 supplies heat to the battery pack 101 and the heater core 302 at the same time.

[0061] Further, the opening of each port of the three-way valve 303 can be adjusted, that is, the flow of the coolant flowing from the first port K to the second port H and the third port J can be adjusted. When both the battery pack 101 and the cabin have heating demand, the thermal management controller is used to control the opening of the three-way valve 303 according to the temperature of the battery pack 101. The higher the temperature of the battery pack 101, the lower the heating demand, the greater the flow of the coolant flowing from the first port K to the second port H, and the smaller the flow of the coolant flowing to the third port J, so that more coolant flows to the heater core 302 to supply heat to the cabin.

[0062] In the embodiment of the present application, when the temperature of the battery pack 101 is less than 0℃, K-H and K-J are each connected by 50%. When the temperature of the battery pack 101 is greater than or equal to 0℃ and less than 10℃, K-H is connected by 70% and K-J is connected by 30%. When the temperature of the battery pack 101 is greater than or equal to 10℃ and less than 15℃, K-H is connected by 80% and K-J is connected by 20%. The opening adjustment conditions and the proportion of each port of the three-way valve 303 can be flexibly set according to the actual vehicle model and different designs.

[0063] The air conditioning refrigeration circuit 400 includes a compressor 401, an evaporator 402 and an outdoor heat exchanger 403. The fan group 206 can assist the outdoor heat exchanger 403 to dissipate heat.

[0064] The air conditioning refrigeration circuit 400 and the battery thermal management circuit 100 exchange heat through the battery cooling heat exchanger 600. When driving or charging, the battery management system sends a battery thermal management request according to the temperature of the battery pack 101.

[0065] When the temperature of the battery pack 101 is greater than the first temperature threshold, the battery management system sends a battery cooling request. After receiving the request from the battery management system, the thermal management controller controls the compressor 401 and the fan group 206 to be turned on. At the same time, the thermal management controller controls the first electronic water pump 103 to start working, the first port K and the second port H of the three-way valve 303 are connected, and the third port J is disconnected, so that the coolant circulates in the battery thermal management circuit 100, and the battery thermal management circuit 100 does not exchange heat with the heating circuit 300. The coolant in the battery thermal management circuit 100 and the refrigerant in the air conditioning refrigeration circuit 400 exchange heat in the battery cooling heat exchanger 600, so that the battery thermal management circuit 100 and the air conditioning refrigeration circuit 400 exchange heat through the battery cooling heat exchanger 600.

[0066] When the temperature of the battery pack 101 is less than the second temperature threshold, the battery management system sends a stop cooling request. After receiving the request from the battery management system, the thermal management controller controls the compressor 401 and the first electronic water pump 103 to stop working, and the battery thermal management circuit 100 does not exchange heat with the air conditioning refrigeration circuit 400.

[0067] In this embodiment, the first temperature threshold is 32°C, and the second temperature threshold is 28°C.

[0068] Further, the air conditioning refrigeration circuit 400 further comprises a thermal expansion valve 404, an electronic expansion valve 405, a stop valve 406, and a liquid separator 407. The air conditioning refrigeration circuit 400 and the heating circuit 300 can exchange heat through the plate heat exchanger 800.

[0069] The seven-way valve 700 is used to control the heat dissipation of the electric drive thermal management circuit 200 and the communication between the battery thermal management circuit 100 and the electric drive thermal management circuit 200.

[0070] The first interface A is selectively connected to one of the second interface B or the fourth interface D, and the third interface C is selectively connected to the other one of the second interface B or the fourth interface D. When the first interface A and the second interface B are connected, and the third interface C and the fourth interface D are connected, the battery thermal management circuit 100 and the electric drive thermal management circuit 200 work independently. When the first interface A and the fourth interface D are connected, and the second interface B and the third interface C are connected, the battery thermal management circuit 100 and the electric drive thermal management circuit 200 are communicated.

[0071] The fifth interface E is selectively connected to the sixth interface F or the seventh interface G. When the fifth interface E and the sixth interface F are connected, the low-temperature radiator 202 is connected to the electric drive thermal management circuit 200 to cool the drive motor 201. When the fifth interface E and the seventh interface G are connected, the low-temperature radiator 202 is not connected to the electric drive thermal management circuit 200, and the coolant does not pass through the low-temperature radiator 202.

[0072] As can be seen, the seven-way valve 700 can be regarded as an integration of a four-way valve having the first interface A, the second interface B, the third interface C, and the fourth interface D, and a three-way valve having the fifth interface E, the sixth interface F, and the seventh interface G. This arrangement makes the pipeline connection more concentrated, which is conducive to saving layout space.

[0073] The thermal management controller is configured to control the seven-way valve 700 to adjust different working modes according to the temperature of the drive motor 201 and the heating or cooling demand of the battery pack 101. The seven-way valve 700 includes the following working modes:

[0074] The first mode: the first interface A and the second interface B of the seven-way valve 700 are connected, the third interface C and the fourth interface D are connected, and the fifth interface E and the sixth interface F are connected.

[0075] The second mode: the first interface A and the second interface B of the seven-way valve 700 are connected, the third interface C and the fourth interface D are connected, and the fifth interface E and the seventh interface G are connected.

[0076] The third mode: the first interface A and the fourth interface D of the seven-way valve 700 are connected, the second interface B and the third interface C are connected, and the fifth interface E and the sixth interface F are connected.

[0077] The fourth mode: the first interface A and the fourth interface D of the seven-way valve 700 are connected, the second interface B and the third interface C are connected, and the fifth interface E and the seventh interface G are connected.

[0078] The electric drive temperature sensor 203 detects the temperature at the outlet of the drive motor 201 and transmits a temperature signal to the thermal management controller. The battery management system sends a request to the thermal management controller according to the heating or cooling demand of the battery pack 101. The thermal management controller controls the mode switching of the seven-way valve 700 according to the received temperature signal and the request of the battery management system.

[0079] When the temperature at the outlet of the drive motor 201 is less than the third temperature threshold value and the battery management system sends a cooling request, the seven-way valve starts the fourth mode. The battery thermal management circuit 100 and the electric drive thermal management circuit 200 are connected, and the relatively low-temperature cooling liquid at the drive motor 201 can flow through the battery pack 101 and cool the battery pack 101. The low-temperature radiator 202 is not connected to the electric drive thermal management circuit 200.

[0080] When the temperature at the outlet of the drive motor 201 is greater than or equal to the third temperature threshold, and the battery management system sends a cooling request, the seven-way valve starts the first mode. The battery thermal management circuit 100 and the electric drive thermal management circuit 200 work independently. The low-temperature radiator 202 is connected to the electric drive thermal management circuit 200, and the cooling liquid in the electric drive thermal management circuit 200 is cooled to cool the drive motor 201. The cooling liquid in the battery thermal management circuit 100 is cooled by heat exchange with the air conditioning refrigeration circuit 400 to cool the battery pack 101.

[0081] When the temperature at the outlet of the drive motor 201 is less than the fourth temperature threshold, and the battery management system sends a heating request, the seven-way valve starts the fourth mode. The battery thermal management circuit 100 and the electric drive thermal management circuit 200 are connected, and the cooling liquid with a relatively high temperature at the drive motor 201 can flow through the battery pack 101 to heat the battery pack 101. The low-temperature radiator 202 is not connected to the electric drive thermal management circuit 200.

[0082] When the temperature at the outlet of the drive motor 201 is greater than or equal to the fourth temperature threshold, and the battery management system sends a heating request, the seven-way valve starts the third mode. The battery thermal management circuit 100 and the electric drive thermal management circuit 200 are connected, and the cooling liquid with a relatively high temperature at the drive motor 201 can flow through the battery pack 101 to heat the battery pack 101. The low-temperature radiator 202 is connected to the electric drive thermal management circuit 200, and the cooling liquid in the electric drive thermal management circuit 200 is cooled to cool the drive motor 201.

[0083] When the temperature at the outlet of the drive motor 201 is less than the fourth temperature threshold, and the battery management system has no request, the seven-way valve starts the second mode. The battery thermal management circuit 100 and the electric drive thermal management circuit 200 work independently, and the cooling liquid in the battery thermal management circuit 100 does not flow. The low-temperature radiator 202 is not connected to the electric drive thermal management circuit 200.

[0084] When the temperature at the outlet of the drive motor 201 is greater than or equal to the fourth temperature threshold, and the battery management system has no request, the seven-way valve starts the first mode. The battery thermal management circuit 100 and the electric drive thermal management circuit 200 work independently, and the cooling liquid in the battery thermal management circuit 100 does not flow. The low-temperature radiator 202 is connected to the electric drive thermal management circuit 200, and the cooling liquid in the electric drive thermal management circuit 200 is cooled to cool the drive motor 201.

[0085] In this embodiment, the third temperature threshold is 20°C, and the second temperature threshold is 40°C.

[0086] The seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600 are integrally arranged. Specifically, as shown in FIG. 6, the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600 are arranged in the order of the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600. Figure 2 The seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600 are integrally arranged. Specifically, as shown in FIG. 6, the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600 are arranged in the order of the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600.Figure 3 As shown, the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600 are integrally arranged on the manifold 900. The manifold 900 is arranged with a cooling liquid flow channel 901 to communicate between the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600. The manifold 900 is provided with a plurality of pipe openings 902, and the plurality of pipe openings 902 communicate with the seven-way valve 700 and the three-way valve 303 through the cooling liquid flow channel 901. Further, two electric drive temperature sensors 203 are also integrally arranged on the manifold 900.

[0087] By integrally arranging the seven-way valve 700, the three-way valve 303, the water-water heat exchanger 500, and the battery cooling heat exchanger 600, the types of parts in the vehicle thermal management system are actually reduced, the cooling liquid flow pipeline is more concentrated, the integration of parts and pipelines is realized, the layout space is saved, and the development of a pure electric charging vehicle model can be met. At the same time, the splicing of the pipeline in the thermal management system is reduced, the risk of water leakage of the thermal management system is reduced, and the safety and reliability are improved.

[0088] The application also provides a vehicle comprising the vehicle thermal management system as described above.

[0089] The vehicle thermal management system and the vehicle of the application achieve heat exchange between the battery thermal management circuit 100 and the electric drive thermal management circuit 200, the heating circuit 300, and the air conditioning refrigeration circuit 400 by arranging the seven-way valve 700, the water-water heat exchanger 500, and the battery cooling heat exchanger 600, to meet different temperature requirements and reduce heat waste. At the same time, the vehicle thermal management system of the application has fewer overall parts and simple pipeline arrangement, which is conducive to integrated design.

[0090] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. A vehicle thermal management system, characterized by, This includes battery thermal management circuit, electric drive thermal management circuit, heating circuit, air conditioning cooling circuit, water-to-water heat exchanger, battery cooling heat exchanger, seven-way valve and thermal management controller. The battery thermal management circuit includes a battery pack, the outlet of the battery pack is connected to the first port of the seven-way valve, and the inlet of the battery pack is connected to the second port of the seven-way valve. The electric thermal management circuit includes a drive motor and a low-temperature radiator. The liquid outlet of the drive motor is connected to the fifth port of the seven-way valve, the liquid inlet of the drive motor is connected to the fourth port of the seven-way valve, the liquid inlet of the low-temperature radiator is connected to the sixth port of the seven-way valve, the liquid outlet of the low-temperature radiator is connected to the third port of the seven-way valve, and the seventh port of the seven-way valve is connected between the liquid outlet of the low-temperature radiator and the third port. The battery thermal management circuit and the heating circuit interact thermally through the water-to-water heat exchanger. The battery thermal management circuit and the air conditioning refrigeration circuit interact thermally through the battery cooling heat exchanger. The thermal management controller is used to control the opening and closing of each port of the seven-way valve and the opening and closing of each circuit, so as to control the heat exchange in the vehicle thermal management system.

2. The vehicle thermal management system of claim 1, wherein, The heating circuit includes a PTC heater, a heater core, and a three-way valve. The heater core is used to deliver warm air to the cab. The first port of the three-way valve is connected to the liquid outlet of the PTC heater, the second port of the three-way valve is connected to the liquid inlet of the warm air core, and the third port of the three-way valve is connected to the hot side liquid inlet of the water-to-water heat exchanger. The outlet of the heating element is connected to the inlet of the PTC heater, and the hot-side outlet of the water-to-water heat exchanger is connected to the pipeline between the heating element and the PTC heater.

3. The vehicle thermal management system according to claim 2, characterized in that, When the battery pack requires heating but the cockpit does not, the thermal management controller controls the first port and the third port of the three-way valve to be connected, and the second port to be closed, so that the PTC heater supplies heat to the battery pack. When both the battery pack and the cockpit require heating, the thermal management controller controls the first port of the three-way valve to be connected to the second port and the third port respectively, and the PTC heater simultaneously supplies heat to the battery pack and the heater core.

4. The vehicle thermal management system of claim 2, wherein, The battery thermal management circuit is equipped with a battery temperature sensor for detecting the temperature of the battery pack. The opening degree of each port of the three-way valve is adjustable. The thermal management controller is used to control the opening degree of the three-way valve according to the temperature of the battery pack.

5. The vehicle thermal management system of claim 2, wherein, The seven-way valve, the three-way valve, the water-to-water heat exchanger, and the battery cooling heat exchanger are integrated into a single unit.

6. The vehicle thermal management system of claim 1, wherein, The battery thermal management circuit is equipped with a battery temperature sensor for detecting the temperature of the battery pack, and the air conditioning refrigeration circuit includes a compressor. When the temperature of the battery pack is greater than the first temperature threshold, the thermal management controller is used to control the compressor to start, and the battery thermal management circuit and the air conditioning refrigeration circuit exchange heat through the battery cooling heat exchanger. When the temperature of the battery pack is lower than the second temperature threshold, the thermal management controller controls the compressor to shut down.

7. The vehicle thermal management system of claim 1, wherein, The water-to-water heat exchanger and the battery cooling heat exchanger are disposed between the battery pack and the first interface. The hot-side liquid inlet of the battery cooling heat exchanger is connected to the liquid outlet of the battery pack, and the hot-side liquid outlet of the battery cooling heat exchanger is connected to the cold-side liquid inlet of the water-to-water heat exchanger. The cold-side liquid outlet of the water-to-water heat exchanger is connected to the first interface. The cold side of the battery cooling heat exchanger is connected to the air conditioning refrigeration circuit; the hot side of the water-to-water heat exchanger is connected to the heating circuit.

8. The vehicle thermal management system of claim 1, wherein, The electric drive thermal management circuit is equipped with two electric drive temperature sensors, which are used to detect the temperature at the liquid inlet and liquid outlet of the drive motor, respectively.

9. The vehicle thermal management system of claim 1, wherein, The thermal management controller is used to control the seven-way valve to adjust different working modes according to the temperature of the drive motor and the heating or cooling requirements of the battery pack. The seven-way valve includes the following operating modes: First mode: The first port of the seven-way valve is connected to the second port, the third port is connected to the fourth port, and the fifth port is connected to the sixth port; Second mode: The first port of the seven-way valve is connected to the second port, the third port is connected to the fourth port, and the fifth port is connected to the seventh port; Third mode: The first port of the seven-way valve is connected to the fourth port, the second port is connected to the third port, and the fifth port is connected to the sixth port; Fourth mode: The first port of the seven-way valve is connected to the fourth port, the second port is connected to the third port, and the fifth port is connected to the seventh port.

10. A vehicle, characterized in that, The vehicle thermal management system includes any one of claims 1-9.

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