Vehicle thermal management system and vehicle

Abstract

The invention provides a vehicle thermal management system and a vehicle. The battery heat management loop comprises a battery pack, a liquid outlet of the battery pack is connected with a first interface of the seven-way valve, and a liquid inlet of the battery pack is connected with a second interface of the seven-way valve. The electric drive heat management loop comprises a driving motor and a low-temperature radiator, a liquid outlet of the driving motor is connected with a fifth connector of the seven-way valve, and a liquid inlet of the driving motor is connected with a fourth connector of the seven-way valve. A liquid inlet of the low-temperature radiator is connected with a sixth connector of the seven-way valve, and a liquid outlet of the low-temperature radiator is connected with a third connector of the seven-way valve. And a seventh interface of the seven-way valve is connected between the liquid outlet of the low-temperature radiator and the third interface. And the battery heat management loop is connected with the heating loop through the water-water heat exchanger. The battery heat management loop is connected with the air conditioner refrigeration loop through the battery cooling heat exchanger. And the thermal management controller controls the connection and disconnection of each interface of the seven-way valve and the opening and closing of each loop. According to the vehicle heat management system and the vehicle, pipeline arrangement is simple, and the space in the vehicle can be saved.

Description

Technical Field

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

[0002] In response to the national call for carbon peak and carbon neutrality, automotive technology is moving towards low-carbon and new energy, and various energy situations and structures have emerged. Among them, the electrification trend is the mainstream direction of the current market. In the field of commercial vehicles, considering energy saving, vehicle thermal management solutions have become more complicated. In order to realize the waste heat utilization function, the current thermal management system has added multiple heat exchangers and valves, which increases system cost and layout difficulties. At the same time, 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 a vehicle to solve the above problems. Summary of the invention

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

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

[0006] The battery thermal management circuit 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 circuit 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 circuit and the heating circuit thermally interact with each other via the water-to-water heat exchanger;

[0009] The battery thermal management circuit and the air conditioning refrigeration circuit thermally interact with each other 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 circuit to control the heat exchange in the vehicle thermal management system.

[0011] Furthermore, the heating circuit includes a PTC heater, a heater core and a three-way valve, wherein the heater 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 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;

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

[0014] Further, when the battery pack has a heating demand and the cockpit has no heating demand, the thermal management controller is used to control the first port and the third port of the three-way valve to be connected, the second port is closed, and the PTC heater supplies heat to the battery pack;

[0015] When both the battery pack and the cockpit require heating, the thermal management controller is used to control the first port of the three-way valve to be connected to the second port and the third port respectively, and the PTC heater supplies heat to the battery pack and the heater core at the same time.

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

[0017] Furthermore, the seven-way valve, the three-way valve, the water-to-water heat exchanger and the battery cooling heat exchanger are integrated.

[0018] Furthermore, the battery thermal management circuit is provided with a battery temperature sensor for detecting the temperature of the battery pack, 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 used to control the compressor to start, and the battery thermal management circuit and the air conditioning refrigeration circuit perform heat exchange 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-to-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-to-water heat exchanger; the cold-side liquid outlet of the water-to-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; the hot side of the water-to-water heat exchanger is connected to the heating circuit.

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

[0024] Furthermore, 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;

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

[0026] First mode: the first interface of the seven-way valve is connected to the second interface, the third interface is connected to the fourth interface, and the fifth interface is connected to the sixth interface;

[0027] Second mode: the first interface of the seven-way valve is connected to the second interface, the third interface is connected to the fourth interface, and the fifth interface is connected to the seventh interface;

[0028] The third mode: the first interface of the seven-way valve is connected to the fourth interface, the second interface is connected to the third interface, and the fifth interface is connected to the sixth interface;

[0029] Fourth mode: the first interface of the seven-way valve is connected to the fourth interface, the second interface is connected to the third interface, and the fifth interface is connected to the seventh interface.

[0030] The present application also discloses a vehicle, comprising the vehicle thermal management system as described above.

[0031] The vehicle thermal management system and vehicle of the present application realize heat exchange between the battery thermal management circuit and the electric drive thermal management circuit, the heating circuit, and the air conditioning refrigeration circuit by setting a seven-way valve, a water-to-water heat exchanger, and a battery cooling heat exchanger to meet different temperature requirements and reduce heat waste. At the same time, the vehicle thermal management system of the present application has a small number of overall parts and a simple pipeline layout, which is conducive to integrated design.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

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

[0035] Figure 2 It is a three-dimensional diagram of some parts of the vehicle thermal management system of the present application being integrated on a collecting plate.

[0036] Figure 3 yes Figure 2 Bottom view of .

[0037] Description of the accompanying 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 storage separator; 500, water-to-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, collecting plate; 901, coolant flow channel; 902, pipe mouth. DETAILED DESCRIPTION

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

[0039] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, 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 relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0040] Next, the embodiments of the present application are described in detail.

[0041] like Figure 1 As shown, the present application provides a vehicle thermal management system, including 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-to-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 is connected to the electric drive thermal management circuit 200 through a seven-way valve 700. The battery thermal management circuit 100 and the heating circuit 300 are thermally exchanged through a water-to-water heat exchanger 500. The battery thermal management circuit 100 and the air conditioning refrigeration circuit 400 are thermally exchanged through a 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 includes a battery pack 101, the liquid outlet of the battery pack 101 is connected to the first interface A of the seven-way valve 700, and the liquid 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 connected in parallel, which can provide sufficient power support during driving.

[0044] Furthermore, a battery temperature sensor 102 and a first electronic water pump 103 are also provided on the battery thermal management circuit 100. The battery temperature sensor 102 is used to detect the temperature of the battery pack 101. Specifically, there are two battery temperature sensors 102, which are respectively provided at the liquid inlet and the liquid outlet of the battery pack 101, and are used to detect the temperature of the liquid inlet and the liquid 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 that the coolant circulates in the battery thermal management circuit 100, thereby transferring heat.

[0045] Furthermore, the water-to-water heat exchanger 500 and the battery cooling heat exchanger 600 are arranged between the liquid outlet of the battery pack 101 and the first interface A. The hot side of the water-to-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 liquid inlet of the battery cooling heat exchanger 600 is connected to the liquid outlet of the battery pack 101, the hot-side liquid outlet of the battery cooling heat exchanger 600 is connected to the cold-side liquid inlet of the water-to-water heat exchanger 500, and the cold-side liquid outlet of the water-to-water heat exchanger 500 is connected to the first interface A. The coolant flowing out of the battery pack 101 passes through the battery cooling heat exchanger 600 and the water-to-water heat exchanger 500 in sequence and enters the seven-way valve 700.

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

[0048] Furthermore, the electric drive thermal management circuit 200 is also provided with an electric drive temperature sensor 203, an auxiliary drive controller 204, a second electronic water pump 205 and a fan group 206. There are two electric drive temperature sensors 203, which are respectively used to detect the temperature at the liquid inlet and the liquid 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 liquid inlet of the drive motor 201. Another electric drive temperature sensor 203 is arranged at the fifth interface E to detect the temperature at the liquid outlet of the drive motor 201.

[0049] The auxiliary drive controller 204 is connected in parallel with the drive motor 201. The coolant from the fourth interface D flows into the liquid inlet of the drive motor 201 and the liquid inlet of the auxiliary drive controller 204 respectively, and flows out from the liquid outlet of the drive motor 201 and the liquid outlet of the auxiliary drive controller 204 and then merges into one path and flows into the fifth interface E.

[0050] The second electronic water pump 205 is used to pressurize the coolant in the electric drive thermal management loop 200 to ensure that the coolant circulates in the electric drive thermal management loop 200 to transfer heat. The fan group 206 is used to accelerate the air flow at the low-temperature radiator 202 to assist the low-temperature radiator 202 in heat dissipation.

[0051] The heating circuit 300 includes a PTC heater 301, a heater core 302 and a three-way valve 303. The PTC heater 301 is used to heat the coolant flowing in the heating circuit 300. The heater 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 liquid outlet of the PTC heater 301. The second port H of the three-way valve 303 is connected to the liquid inlet of the heater core 302. The third port J of the three-way valve 303 is connected to the hot side liquid inlet of the water-to-water heat exchanger 500. The liquid outlet of the heater core 302 is connected to the liquid inlet of the PTC heater 301, and the hot side liquid outlet of the water-to-water heat exchanger 500 is connected to the pipeline between the heater core 302 and the PTC heater 301.

[0053] The first port K can be selectively connected to the second port H or the third port J. When the first port K is connected to the second port H and the third port J is disconnected, the PTC heater 301 supplies heat to the cab through the heater core 302. The coolant flowing out of the PTC heater 301 returns 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 connected to 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-to-water heat exchanger 500. The coolant flowing out of the PTC heater 301 returns to the PTC heater 301 through the first port K, the third port J, and the water-to-water heat exchanger 500 in sequence.

[0055] The first port K can also be connected to the second port H and the third port J at the same time. When the first port K is connected to the second port H and the third port J at the same time, the PTC heater 301 simultaneously supplies heat to the cab and the battery pack 101. The coolant flowing out of the PTC heater 301 flows into the three-way valve 303 through the first port K, flows through the second port H and the heater core 302 in sequence to return to the PTC heater 301, and flows through the third port J and the water-to-water heat exchanger 500 in sequence to return to the PTC heater 301.

[0056] Furthermore, 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 coolant in the heating circuit 300 to ensure that the coolant circulates in the heating circuit 300, thereby performing heat transfer.

[0057] When driving, the battery management system issues 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 each port of the three-way valve 303 according to whether there is a heating demand for the battery pack 101 and the cockpit.

[0058] When the battery pack 101 has a heating demand and the cockpit has no heating demand, the battery management system issues 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 connected, and the second port H is closed. The coolant in the battery thermal management loop 100 and the coolant in the heating loop 300 transfer heat in the water-to-water heat exchanger 500, and the PTC heater 301 provides heat to the battery pack 101.

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

[0060] When both the battery pack 101 and the cockpit need to be heated, the battery management system and the air conditioning control system both send out a 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] Furthermore, the opening of each port of the three-way valve 303 is adjustable, that is, the flow rate of the coolant flowing from the first port K to the second port H and the third port J is adjustable. When both the battery pack 101 and the cockpit have heating requirements, 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 coolant flow rate from the first port K to the second port H, and the smaller the coolant flow rate to the third port J, so that more coolant flows to the heater core 302 to heat the cab.

[0062] In the embodiment of the present application, when the temperature of the battery pack 101 is less than 0°C, KH and KJ are each open by 50%. When the temperature of the battery pack 101 is greater than or equal to 0°C and less than 10°C, KH is open by 70% and KJ is open by 30%. When the temperature of the battery pack 101 is greater than or equal to 10°C and less than 15°C, KH is open by 80% and KJ is open by 20%. The opening adjustment conditions and proportions 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 in heat dissipation.

[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 issues 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 issues 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 turn on. At the same time, the thermal management controller controls the first electronic water pump 103 to start working, and the first port K of the three-way valve 303 is connected to the second port H, 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 and the heating circuit 300 do not perform heat exchange. The coolant in the battery thermal management circuit 100 and the refrigerant in the air-conditioning refrigeration circuit 400 transfer heat in the battery cooling heat exchanger 600, so that the battery thermal management circuit 100 and the air-conditioning refrigeration circuit 400 perform heat exchange through the battery cooling heat exchanger 600.

[0066] When the temperature of the battery pack 101 is lower than the second temperature threshold, the battery management system issues a request to stop cooling. 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 and the air conditioning refrigeration circuit 400 do not perform heat exchange.

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

[0068] Furthermore, the air conditioning refrigeration circuit 400 further includes a thermal expansion valve 404, an electronic expansion valve 405, a stop valve 406 and a liquid storage 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 can be selectively connected to one of the second interface B or the fourth interface D, and the third interface C can be selectively connected to the other of the second interface B or the fourth interface D. When the first interface A is connected to the second interface B and the third interface C is connected to the fourth interface D, the battery thermal management circuit 100 and the electric drive thermal management circuit 200 work independently. When the first interface A is connected to the fourth interface D and the second interface B is connected to the third interface C, the battery thermal management circuit 100 is connected to the electric drive thermal management circuit 200.

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

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

[0073] The thermal management controller is used 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 requirements of the battery pack 101. The seven-way valve 700 includes the following working modes:

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

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

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

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

[0078] The electric drive temperature sensor 203 detects the temperature at the outlet of the drive motor 201 and transmits the 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 needs 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 and the battery management system sends a cooling request, the seven-way valve starts the fourth mode. The battery thermal management circuit 100 is connected to the electric drive thermal management circuit 200, and the coolant with a relatively low temperature 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 to dissipate the coolant in the electric drive thermal management circuit 200 and then cool the drive motor 201. The coolant in the battery thermal management circuit 100 exchanges heat 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 is connected to the electric drive thermal management circuit 200, and the coolant with a relatively high temperature at the drive motor 201 can flow through the battery pack 101 and 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 is connected to the electric drive thermal management circuit 200, and the coolant with a relatively high temperature at the drive motor 201 can flow through the battery pack 101 and heat the battery pack 101. The low-temperature radiator 202 is connected to the electric drive thermal management circuit 200 to dissipate the coolant in the electric drive thermal management circuit 200 and then 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 there is no request from the battery management system, 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 coolant does not circulate in the battery thermal management circuit 100. 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 there is no request from the battery management system, 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 coolant in the battery thermal management circuit 100 does not circulate. The low-temperature radiator 202 is connected to the electric drive thermal management circuit 200 to dissipate the coolant in the electric drive thermal management circuit 200 and then 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-to-water heat exchanger 500, and the battery cooling heat exchanger 600 are integrated. Figure 2 and Figure 3 As shown, the seven-way valve 700, the three-way valve 303, the water-to-water heat exchanger 500 and the battery cooling heat exchanger 600 are integrated on the collector plate 900. A coolant flow channel 901 is arranged in the collector plate 900 to communicate between the seven-way valve 700, the three-way valve 303, the water-to-water heat exchanger 500 and the battery cooling heat exchanger 600. A plurality of nozzles 902 are arranged on the collector plate 900, and the plurality of nozzles 902 are connected to the seven-way valve 700 and the three-way valve 303 through the coolant flow channel 901. Further, two electric drive temperature sensors 203 are also integrated on the collector plate 900.

[0087] By integrating the seven-way valve 700, the three-way valve 303, the water-to-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 pipelines for the circulation of coolant are more concentrated, the integration of parts and pipelines is realized, the layout space is saved, and it can meet the development of pure electric charging models. At the same time, the splicing of pipelines in the thermal management system is reduced, the risk of water leakage in the thermal management system is reduced, and the safety and reliability are improved.

[0088] The present 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 present application realize 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 setting a seven-way valve 700, a water-to-water heat exchanger 500 and a 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 present application has a small number of overall parts and a simple pipeline layout, 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 causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A vehicle thermal management system, characterized in that: Including battery thermal management circuit, electric drive thermal management circuit, heating circuit, air conditioning refrigeration 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 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; The electric drive thermal management circuit 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; The battery thermal management circuit and the heating circuit thermally interact with each other via the water-to-water heat exchanger; The battery thermal management circuit and the air conditioning refrigeration circuit thermally interact with each other through the battery cooling heat exchanger; 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 circuit to control the heat exchange in the vehicle thermal management system.

2. The vehicle thermal management system according to claim 1, characterized in that: The heating circuit includes a PTC heater, a heating core and a three-way valve. The heating 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 liquid outlet of the heater core is connected to the liquid inlet of the PTC heater, and the hot-side liquid outlet of the water-to-water heat exchanger is connected to the pipeline between the heater core and the PTC heater.

3. The vehicle thermal management system according to claim 2, characterized in that: When the battery pack has a heating demand and the cockpit has no heating demand, the thermal management controller is used to control the first port and the third port of the three-way valve to be connected, the second port is closed, and the PTC heater supplies heat to the battery pack; When both the battery pack and the cockpit require heating, the thermal management controller is used to control the first port of the three-way valve to be connected to the second port and the third port respectively, and the PTC heater supplies heat to the battery pack and the heater core at the same time.

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

5. The vehicle thermal management system according to claim 2, characterized in that: The seven-way valve, the three-way valve, the water-to-water heat exchanger and the battery cooling heat exchanger are integrated.

6. The vehicle thermal management system according to claim 1, characterized in that: The battery thermal management circuit is provided 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 a 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 perform heat exchange through the battery cooling heat exchanger; 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.

7. The vehicle thermal management system according to claim 1, characterized in that: The water-to-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, 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 according to claim 1, characterized in that: Two electric drive temperature sensors are arranged on the electric drive thermal management circuit, and the two electric drive temperature sensors are used to detect the temperature at the liquid inlet and the liquid outlet of the drive motor respectively.

9. The vehicle thermal management system according to claim 1, characterized in that: 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 working modes: First mode: the first interface of the seven-way valve is connected to the second interface, the third interface is connected to the fourth interface, and the fifth interface is connected to the sixth interface; Second mode: the first interface of the seven-way valve is connected to the second interface, the third interface is connected to the fourth interface, and the fifth interface is connected to the seventh interface; The third mode: the first interface of the seven-way valve is connected to the fourth interface, the second interface is connected to the third interface, and the fifth interface is connected to the sixth interface; Fourth mode: the first interface of the seven-way valve is connected to the fourth interface, the second interface is connected to the third interface, and the fifth interface is connected to the seventh interface.

10. A vehicle, characterized in that: The vehicle thermal management system comprises the vehicle thermal management system as claimed in any one of claims 1 to 9.

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