Thermal management system, thermal management system control method and vehicle

Abstract

The embodiment of the invention provides a thermal management system, a thermal management system control method and a vehicle. The heat management system comprises a compressor, a water-cooling condenser, a first throttle valve, a battery side evaporator, an electric heater and a battery side radiator; the compressor, the water cooling condenser, the first throttling valve and a refrigerant flow channel of the battery side evaporator can be sequentially connected in series to form a refrigerant loop; the battery side radiator comprises a first cooling liquid flow channel and a second cooling liquid flow channel; a cooling liquid flow channel of the water-cooled condenser, a cooling liquid flow channel of the electric heater and the first cooling liquid flow channel can be connected in series to form a first cooling liquid loop; the second cooling liquid flow channel and the cooling liquid flow channel of the battery side evaporator can be connected in series to form a second cooling liquid loop. Under the condition that the compressor starts limited start protection under the extremely low temperature condition, sufficient gasification of the liquid refrigerant is achieved by starting the electric heater for a period of time, then the compressor can be started, the compressor is used for compression heating, and the heating requirement of the heat management system is met.

Description

Technical Field

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

[0002] Due to the limitations of the physical and chemical properties of the refrigerant used in the thermal management system, in extremely low temperature environments (for example, below -15°C), the refrigerant cannot fully absorb heat and vaporize, but is in a gas-liquid mixed state. In this case, in order to prevent liquid refrigerant from entering the compressor and causing liquid hammer, the thermal management system will turn on the low-temperature start protection and limit the start of the compressor. In order to meet the heating needs, the thermal management system will often install a high-power electric heater (Positive Temperature Coefficient, PTC) in the water circulation loop to utilize high-power PTC to generate heat. However, the use of PTC to generate heat cannot utilize the heat pump system to achieve self-generated heat recovery, resulting in poor energy utilization efficiency, and the cost of high-power PTC is relatively high. Summary of the Invention

[0003] In order to solve the above technical problems, embodiments of the present disclosure provide a thermal management system, a thermal management system control method, and a vehicle.

[0004] In a first aspect, an embodiment of the present disclosure provides a thermal management system, comprising a compressor, a water-cooled condenser, a first throttle valve, a battery-side evaporator, an electric heater, and a battery-side radiator;

[0005] The compressor, the water-cooled condenser, the first throttle valve, and the refrigerant flow passage of the battery-side evaporator may be sequentially connected in series to form a refrigerant circuit;

[0006] The battery side radiator includes a first coolant flow channel and a second coolant flow channel;

[0007] The coolant flow channel of the water-cooled condenser, the coolant flow channel of the electric heater and the first coolant flow channel can be connected in series to form a first coolant circuit;

[0008] The second coolant flow channel and the coolant flow channel of the battery-side evaporator may be connected in series to form a second coolant circuit.

[0009] Optionally, the thermal management system further includes a liquid cooling plate and a first three-way valve;

[0010] The first interface of the cooling liquid channel of the liquid cooling plate is in communication with the first port of the first three-way valve;

[0011] The first interface of the second coolant flow channel is in communication with the second port of the first three-way valve;

[0012] The first interface of the battery-side evaporator coolant flow channel is connected to the third port of the first three-way valve;

[0013] The second interface of the battery-side evaporator coolant flow channel is in communication with the second interface of the liquid-cooling plate coolant flow channel and the second interface of the second coolant flow channel.

[0014] Optionally, the thermal management system further includes a first water pump;

[0015] The first interface of the first water pump coolant flow channel is connected to the second interface of the battery side evaporator coolant flow channel;

[0016] The second interface of the first water pump coolant flow channel is communicated with the second interface of the liquid cooling plate coolant flow channel and the second interface of the second coolant flow channel.

[0017] Optionally, the thermal management system further includes an electric drive unit and a first valve;

[0018] The outlet of the first valve is in communication with the inlet of the coolant flow channel of the electric drive unit;

[0019] The first inlet of the first valve is in communication with the third port of the first three-way valve;

[0020] The outlet of the electric drive unit coolant flow channel is communicated with the second interface of the battery side evaporator coolant flow channel.

[0021] Optionally, the thermal management system further includes an electric drive radiator; the first valve further includes a second inlet that cannot be connected to the first inlet and its own outlet at the same time;

[0022] The inlet of the coolant flow channel of the electric drive radiator is communicated with the outlet of the coolant flow channel of the electric drive unit, and the outlet of the coolant flow channel of the electric drive radiator is communicated with the second inlet.

[0023] Optionally, the thermal management system further includes a second three-way valve and an internal combustion engine water channel;

[0024] The first port of the second three-way valve is in communication with the outlet of the coolant flow channel of the water-cooled condenser and the inlet of the water channel of the internal combustion engine;

[0025] The second port of the second three-way valve is connected to the outlet of the internal combustion engine water channel;

[0026] The third port of the second three-way valve is communicated with the inlet of the coolant flow channel of the electric heater.

[0027] Optionally, the thermal management system also includes a heater core;

[0028] The inlet of the heater core coolant flow channel is communicated with the outlet of the electric heater coolant flow channel, and the outlet of the heater core coolant flow channel is communicated with the inlet of the first coolant flow channel.

[0029] Optionally, the thermal management system further includes an outdoor heat exchanger, a first stop valve and a one-way valve;

[0030] The inlet of the refrigerant flow channel of the outdoor heat exchanger is connected to the outlet of the refrigerant flow channel of the water-cooled condenser;

[0031] The outlet of the refrigerant flow channel of the outdoor heat exchanger is connected to the inlet of the one-way valve;

[0032] The outlet of the one-way valve is in communication with the inlet of the refrigerant flow channel of the first throttle valve;

[0033] Both ends of the first stop valve are respectively connected to the refrigerant flow channel outlet of the water-cooled condenser and the refrigerant flow channel inlet of the first throttle valve.

[0034] Optionally, the thermal management system further includes a second throttle valve and a second shut-off valve;

[0035] The inlet of the refrigerant flow channel of the second throttle valve is directly connected to the outlet of the refrigerant flow channel of the water-cooled condenser, and the outlet of the refrigerant flow channel of the second throttle valve is connected to the inlet of the refrigerant flow channel of the outdoor heat exchanger;

[0036] Both ends of the second stop valve are respectively connected to the outlet of the refrigerant flow channel of the outdoor heat exchanger and the inlet of the refrigerant flow channel of the compressor.

[0037] In a second aspect, an embodiment of the present disclosure provides a thermal management system control method, which is applied to the thermal management system described above, comprising:

[0038] In response to receiving the start-up instruction of the ultra-low temperature working mode and determining that the compressor starts the restricted start protection, the refrigerant circuit, the first coolant circuit and the second coolant circuit are controlled to be connected respectively, and the electric heater is started for heating until the restricted start protection of the compressor is released.

[0039] Optionally, in response to receiving a start instruction for the cabin dehumidification mode, the first stop valve is controlled to open, and the first throttle valve is controlled to open to a set opening, so as to achieve heat absorption and evaporation of the refrigerant compressed by the compressor in the cabin evaporator.

[0040] Optionally, the method further includes: detecting the water channel temperature of the internal combustion engine water channel;

[0041] Determining that the water channel temperature is higher than or equal to a set temperature, controlling the first port and the second port of the third three-way valve to communicate with each other so that the internal combustion engine water channel is merged into the first coolant circuit; and

[0042] It is determined that the water channel temperature is lower than the set temperature, and the first port and the third port of the third three-way valve are controlled to communicate with each other to prevent the internal combustion engine water channel from being merged into the first coolant circuit.

[0043] In a third aspect, an embodiment of the present disclosure provides a control device, comprising a processor and a memory, wherein the memory is used to store a computer program; when the computer program is loaded by the processor, the processor executes the thermal management system control method as described above.

[0044] In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium, wherein the storage medium stores a computer program. When the computer program is executed by a processor, the processor implements the thermal management system control method as described above.

[0045] In a fifth aspect, an embodiment of the present disclosure provides a vehicle comprising at least one of the thermal management system, control device, and computer-readable storage medium as described above.

[0046] Using the solution provided by the embodiments of the present disclosure, the coolant in the battery thermal management system, after being heated by the battery-side radiator, enters the coolant flow channel of the battery-side evaporator. Because the coolant temperature is significantly higher than that of the liquid refrigerant, the heat carried by the coolant in the battery-side evaporator is transferred through the battery-side evaporator to the refrigerant in the refrigerant flow channel. The liquid refrigerant in the refrigerant flow channel absorbs the heat and evaporates, becoming a gaseous refrigerant.

[0047] When the liquid refrigerant absorbs heat in the battery side evaporator and becomes gaseous refrigerant, and there is enough gaseous refrigerant to supply the heat pump subsystem compressor, the compressor can start, generate heat through compression work, and compress the gaseous refrigerant into high-temperature gaseous refrigerant.

[0048] That is to say, by adopting the embodiment of the present disclosure, in the ultra-low temperature working mode, by turning on the electric heater for a period of time to achieve sufficient vaporization of the liquid refrigerant, the compressor can be turned on, and the compressor can be used to compress and generate heat, and the system heating can be recycled and utilized in the heat pump system to improve the thermal efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0050] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without inventive work, including:

[0051] Figure 1 is a schematic structural diagram of a thermal management system provided by some embodiments of the present disclosure;

[0052] Figure 2 is a schematic structural diagram of a first three-way valve used in some embodiments of the present disclosure;

[0053] Figure 3 is a schematic diagram of another thermal management system provided by an embodiment of the present disclosure;

[0054] Figure 4 This is a schematic diagram of the thermal management system structure used in pure electric vehicles;

[0055] Figure 5 is a flow chart of a thermal management system control method provided by an embodiment of the present disclosure;

[0056] Figure 6 It is a structural diagram of the control device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0057] The following describes embodiments of the present disclosure in more detail with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0058] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0059] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0060] To address the problem of compressor startup failure at extremely low temperatures and the resulting poor energy efficiency caused by the use of high-power PTC heat generation, related technologies have proposed improvements to thermal management systems. These include installing a dedicated evaporator within the thermal management system to absorb heat and evaporate the refrigerant after compression. This evaporator absorbs the heat generated by the system's PTC operation, vaporizing the refrigerant and enabling the compressor to start operating at extremely low temperatures. However, implementing this solution requires a dedicated evaporator within the thermal management system, which does not fully utilize existing thermal management system components, increasing system complexity and, consequently, manufacturing and maintenance costs.

[0061] To solve the aforementioned problems, the embodiments of the present disclosure improve the existing thermal management system and reuse the battery thermal management components in the thermal management system to achieve heat absorption and gasification of the refrigerant, thereby reducing the complexity of the system.

[0062] Figure 1 This is a schematic diagram of the structure of the thermal management system provided by some embodiments of the present disclosure. Figure 1 As shown, the thermal management system provided by the embodiment of the present disclosure includes a heat pump subsystem, an intermediate heat exchange subsystem and a battery thermal management subsystem. The aforementioned subsystems are coupled through heat exchangers to achieve heat transfer.

[0063] The following is an analysis of how to achieve coupling between the various subsystems, realize the heat absorption and vaporization of the refrigerant under extremely low temperature conditions, and then enable the compressor to start under extremely low temperature conditions.

[0064] The heat pump subsystem is the subsystem that implements refrigerant circulation and phase change. It includes a compressor 11, a water-cooled condenser 12, a first throttle valve 13, and a battery-side evaporator 14. The refrigerant flow channel outlet of compressor 11 is connected to the refrigerant flow channel inlet of the water-cooled condenser 12, the refrigerant flow channel outlet of the water-cooled condenser 12 is connected to the refrigerant flow channel inlet of the first throttle valve 13, the refrigerant flow channel outlet of the first throttle valve 13 is connected to the refrigerant flow channel inlet of the battery-side evaporator 14, and the refrigerant flow channel outlet of the battery-side evaporator 14 is connected to the refrigerant flow channel inlet of compressor 11. In other words, the refrigerant flow channels of the compressor 11, water-cooled condenser 12, first throttle valve 13, and battery-side evaporator 14 are connected in series.

[0065] The heating and cooling subsystem is used to conduct heat for heating. In some embodiments, the heating and cooling subsystem can transfer heat from itself or from a heat pump system to the battery thermal management subsystem. In addition to the aforementioned water-cooled condenser 12, the heating and cooling subsystem also includes an electric heater 15 and a battery-side radiator 16. The battery-side radiator 16 includes a first coolant flow channel and a second coolant flow channel. The first coolant flow channel is connected in series with the coolant flow channels of the water-cooled condenser 12 and the electric heater 15.

[0066] like Figure 1 As shown, in the disclosed embodiment, the coolant flow channel outlet of the water-cooled condenser 12 can communicate with the coolant flow channel inlet of the electric heater 15, the coolant flow channel outlet of the electric heater 15 can communicate with the inlet of the first coolant flow channel in the battery-side radiator 16, and the outlet of the first coolant flow channel communicates with the outlet of the coolant flow channel of the water-cooled condenser 12. In this state, the coolant flow channel of the water-cooled condenser 12, the coolant flow channel of the electric heater 15, and the first coolant flow channel are connected in series to form a first coolant circuit, and the coolant can circulate in the first coolant circuit.

[0067] Of course, in order to achieve the circulation of the coolant between the water-cooled condenser 12 , the electric heater 15 and the battery-side radiator 16 , the warm air thermal management subsystem should also include a third water pump that drives the coolant to flow.

[0068] The battery thermal management subsystem includes the aforementioned battery-side evaporator 14 and battery-side radiator 16. In certain operating modes (ultra-low temperature operating modes), the coolant flow channel of the battery-side evaporator 14 can be connected in series with the second coolant flow channel of the battery-side radiator 16, and the coolant can circulate between the battery-side evaporator 14 and the battery-side radiator 16.

[0069] The following analyzes the process by which the thermal management system, comprised of the aforementioned components, activates compressor 11 under ultra-low temperature operating conditions. In ultra-low temperature operating conditions, and with the thermal management system not yet activated, the refrigerant in the heat pump subsystem is in a liquid state. To prevent liquid hammer, the compressor is restricted from starting for protection, preventing direct startup of compressor 11.

[0070] At this point, the water pump in the warm air thermal management subsystem starts operating, and the electric heater 15 generates heat, heating the water-cooled condenser 12. Subsequently, driven by the water pump, the coolant heated by the electric heater flows into the first coolant channel of the battery-side radiator 16. Within this first coolant channel, the heat carried by the coolant in the warm air thermal management subsystem is transferred through the battery-side radiator 16 to the coolant in the battery thermal management subsystem, raising the temperature of the coolant in the battery thermal management subsystem. The cooled coolant in the first coolant channel then flows back to the water-cooled condenser 12 and continues its circulation.

[0071] After being heated in the battery-side radiator 16, the coolant in the battery thermal management system flows out of the second coolant channel of the battery-side radiator 16 and into the coolant channel of the battery-side evaporator 14. Because the coolant temperature is significantly higher than that of the liquid refrigerant, the heat carried by the coolant in the battery-side evaporator 14 is transferred to the refrigerant in the refrigerant channel. The liquid refrigerant in the refrigerant channel absorbs the heat and evaporates, becoming a gaseous refrigerant.

[0072] When liquid refrigerant is converted into gaseous refrigerant and there is enough gaseous refrigerant to supply the heat pump subsystem compressor 11, the temperature at the compressor 11 rises, and its limited start protection is triggered, and the compressor 11 can start, generating heat through compression work, and the gaseous refrigerant is converted into high-temperature gaseous refrigerant by the compressor 11. The high-temperature gaseous refrigerant then flows into the water-cooled condenser 12 to release heat, and can be converted into low-temperature liquid refrigerant. Under the throttling action of the first throttle valve 13, the low-temperature liquid refrigerant enters the battery side evaporator 14 again to evaporate and absorb heat, turning into gaseous refrigerant, and continues to enter the compressor 11 to be compressed.

[0073] In other words, the thermal management system provided by the embodiments of the present disclosure is used. The coolant flow channel of the water-cooled condenser, the coolant flow channel of the electric heater, and the first coolant flow channel are connected in series to form a first cooling circuit, and the second coolant flow channel and the coolant flow channel of the battery-side evaporator are connected in series to form a second coolant circuit. After the electric heater 15 is turned on for a period of time and sufficient liquid refrigerant is vaporized, the compressor 11 can be turned on to compress and generate heat using the compressor 11, thereby recovering and utilizing the system heat in the heat pump system and improving the thermal efficiency of the entire system.

[0074] In a specific implementation, after starting the compression heating of the compressor 11, it can be determined whether it is necessary to start the electric heater 15 to generate heat based on the heating requirements of the entire system and the compression heating power of the compressor 11, and then it can be determined whether to reduce the heating power of the electric heater 15 or turn off the heating of the electric heater 15.

[0075] Combined with the analysis above, the battery-side evaporator 14 and the battery-side radiator 16 are both part of the battery thermal management subsystem. As its name suggests, the battery thermal management subsystem is a subsystem that manages battery thermal performance. Its core function remains to achieve battery thermal management. The aforementioned series connection between the second coolant flow channel and the coolant flow channel of the battery-side evaporator 14 in the ultra-low temperature operating mode is achieved when battery thermal management is not required or is not a concern.

[0076] However, in actual applications, the battery side evaporator 14 and the battery side radiator 16 are also subsystems for thermal management of the battery. Figure 1To achieve thermal management of the battery, the battery thermal management subsystem also includes a liquid cooling plate 17 and a first three-way valve 18, wherein the first three-way valve 18 can be a plug-type three-way valve. The first interface of the coolant flow channel of the liquid cooling plate 17 is connected to the first port of the first three-way valve 18, the first interface of the second coolant flow channel is connected to the second port of the first three-way valve 18, and the first interface of the coolant flow channel of the battery-side evaporator 14 is connected to the third port of the first three-way valve 18. The second interface of the coolant flow channel of the battery-side evaporator 14 is connected to the second interface of the coolant flow channel of the liquid cooling plate 17 and the inlet of the second coolant flow channel.

[0077] Figure 2 This is a schematic diagram of the structure of a first three-way valve used in some embodiments of the present disclosure. The three-way valve shown is a plug-type three-way valve. By changing the position of the plug, the connection relationship between the first port A and the second port B and the third port C of the three-way valve can be changed.

[0078] In the aforementioned configuration, if the first three-way valve 18 is configured to connect the second port B to the third port C and the first port A is closed, the second coolant flow channel can be connected in series with the coolant flow channel of the battery-side evaporator 14 in the ultra-low temperature operating mode as described above. In this case, the coolant in the liquid cold plate 17 does not circulate, and heating or cooling management of the battery body cannot be achieved.

[0079] If the first three-way valve 18 is set to connect the first port A and the second port B, and the third port C is closed, the coolant flow channel of the liquid cooling plate 17 is connected in series with the second coolant flow channel, and the heating management of the battery can be achieved.

[0080] If the first three-way valve 18 is set to connect the first port A and the third port C and close the second port B, the coolant flow channel of the liquid cooling plate 17 is connected in series with the coolant flow channel of the battery side evaporator 14, and the battery cooling management can be achieved.

[0081] In some embodiments, the first three-way valve 18 can also be configured to achieve simultaneous connection between the first port A and the second port B and the third port C. In this case, by driving the coolant to flow out of the coolant flow channel and the second coolant flow channel of the liquid cooling plate 17 and then flow into the coolant flow channel of the battery side evaporator 14, heat recovery of the battery and heat in the warm air thermal management subsystem can be achieved simultaneously.

[0082] As previously analyzed, in the disclosed example, in order to realize the flow of coolant in the coolant flow channel of the battery thermal management subsystem, the battery thermal management subsystem also needs a water pump to realize the flow of coolant. Figure 1As shown, in the disclosed embodiment, the water pump includes a first water pump 19. The first interface of the coolant flow channel of the first water pump 19 is connected to the second interface of the coolant flow channel of the battery-side evaporator 14; the second interface of the coolant flow channel of the first water pump 19 is connected to the second interface of the coolant flow channel of the liquid cooling plate 17 and the second interface of the second coolant flow channel.

[0083] When the first three-way valve 18 is connected between the first port A and the third port C to implement battery cooling management, the first water pump 19 drives the coolant to circulate between the liquid cooling plate 17 and the coolant flow channel of the battery-side evaporator 14. When the second port B and the third port C of the first three-way valve 18 are connected to implement heating management in ultra-low temperature mode, the first water pump 19 drives the coolant to flow between the battery-side radiator 16 and the battery-side evaporator 14. When the first port A, the second port B, and the third port C of the first three-way valve 18 are all connected, the first water pump 19 drives the coolant out of the coolant flow channel of the liquid cooling plate 17 and the second coolant flow channel and then into the coolant flow channel of the battery-side evaporator 14, thereby simultaneously recovering heat from the battery and the warm air thermal management subsystem.

[0084] Of course, in other embodiments, the first water pump for driving the coolant circulation in the battery thermal management subsystem may also be set at other locations, and is not limited to Figure 1 In addition, in some embodiments, the series relationship of the coolant flow channels of the various components constituting the aforementioned first coolant circuit can be adaptively changed according to needs without affecting the realization of the functions described above.

[0085] Figure 3 is a schematic diagram of another thermal management system provided by an embodiment of the present disclosure. Figure 3 The thermal management system shown is in Figure 1 Improve the thermal management system shown in the figure and add new functional components. Figure 3 As shown, the thermal management system in the embodiment of the present disclosure includes Figure 1 In addition to the components in FIG, the electric drive thermal management subsystem is also included. The electric drive thermal management subsystem includes an electric drive unit 20 and a first valve 21.

[0086] The aforementioned first valve 21 is a one-inlet and three-outlet valve, that is, a four-way valve, which can form different coolant flow channels and achieve different heat exchange functions by changing the connection relationship between the three inlets and outlets.

[0087] The outlet of the first valve 21 communicates with the inlet of the coolant flow channel of the electric drive unit 20. The first inlet of the first valve 21 communicates with the third port C of the first three-way valve 18. The outlet of the coolant flow channel of the electric drive unit 20 communicates with both the second inlet of the first valve 21 and the outlet of the coolant flow channel of the battery-side evaporator 14. Furthermore, to ensure the flow of coolant within the coolant flow channel of the electric drive unit 20, the electric drive thermal management subsystem also includes a second water pump 22.

[0088] In the embodiment of the present disclosure, if the aforementioned first three-way valve 18 is configured to connect the first port A and the third port C, and the first valve 21 is configured to connect the second port B with the first port A, the coolant can flow between the electric drive unit 20 and the liquid cooling plate 17 through the drive of one of the first water pump 19 and the second water pump 22. At this time, if the electric drive unit 20 is in a high-power operating state, the heat generated by it can be transferred to the liquid cooling plate 17 through the coolant circulation, thereby heating the battery.

[0089] In the embodiment of the present disclosure, if the first valve 21 is set to connect the second inlet and the outlet, the coolant in the electric drive unit 20 is in a self-circulation state, that is, an electric drive small circulation state, which can realize self-heating of the motor and the coolant when the drive motor just starts running, and then the electric drive unit 20 is in an efficient operation state.

[0090] See Figure 3 In the disclosed embodiment, the electric drive thermal management subsystem further includes an electric drive radiator 23. The inlet of the coolant flow channel of the electric drive radiator 23 is connected to the outlet of the coolant flow channel of the electric drive unit 20, and the outlet of the coolant flow channel of the electric drive radiator 23 is connected to the third inlet of the first valve 21. When the ambient temperature is high and the electric drive unit 20 is operating at high power, the coolant flowing through the electric drive unit 20, with the third inlet and outlet of the first valve 21 connected, flows into the coolant flow channel of the electric drive radiator 23, and heat is dissipated through the electric drive radiator 23.

[0091] As previously mentioned, the first valve 21 in the disclosed embodiment is a four-way valve with three inlets and one outlet. Its three inlets are provided to implement the functions described in the aforementioned embodiments. If the functions corresponding to the inlets are no longer needed, the corresponding inlets can be eliminated, transforming the first valve 21 into a three-way valve with two inlets and one outlet, or a conventional valve with one inlet and one outlet.

[0092] like Figure 3 As shown, the heater thermal management subsystem within the thermal management system of this disclosure can also utilize heat generated by the vehicle engine to implement heating management. Specifically, the heater thermal management subsystem also includes a second three-way valve 24. Furthermore, the thermal management system also includes an internal combustion engine water channel 25, an engine radiator 26, and a thermostat 27.

[0093] The first port of the second three-way valve 24 communicates with the outlet of the coolant flow channel of the water-cooled condenser 12 and the inlet of the internal combustion engine water channel 25. The second port of the second three-way valve 24 communicates with the outlet of the internal combustion engine water channel 25. The third port of the second three-way valve 24 communicates with the inlet of the coolant flow channel of the electric heater 15. When the engine is operating and generating heat or is at a high temperature, and the thermal management system is in heating mode (including the aforementioned ultra-low temperature heating mode), the first and second ports of the second three-way valve 24 communicate, allowing coolant in the warm air thermal management subsystem to flow into the internal combustion engine water channel to absorb heat, then flow through the electric heater 15 again before releasing heat at the battery-side radiator 16. When the engine is stopped and its temperature is not high, the first and third ports of the second three-way valve 24 communicate, allowing coolant in the warm air thermal management subsystem to flow through the water-cooled condenser 12, then directly through the second three-way valve 24, and into the electric heater 15. In other words, the second three-way valve 24 bypasses the internal combustion engine water channel 25.

[0094] In the disclosed embodiment, the inlet of thermostat 27 is connected to the outlet of internal combustion engine water channel 25, the first outlet of thermostat 27 is connected to the inlet of internal combustion engine water channel 25, the second outlet of thermostat 27 is connected to the inlet of the coolant flow channel of engine radiator 26, and the outlet of the coolant flow channel of engine radiator 26 is connected to the inlet of internal combustion engine water channel 25. When the engine is just started, the inlet of thermostat 27 is connected to the first outlet, bypassing the engine radiator 26 and achieving rapid engine temperature increase. After the engine temperature reaches the set temperature, the inlet of thermostat 27 is connected to the second outlet, bypassing the first outlet. At this time, the engine heat can be dissipated through the engine radiator 26, ensuring that the engine is at an appropriate temperature.

[0095] like Figure 3 As shown, in the disclosed embodiment, the heater thermal management subsystem may further include a heater core 28, which is disposed within the cabin air duct. The inlet of the coolant flow channel of the heater core 28 is connected to the outlet of the coolant flow channel of the electric heater 15, and the outlet of the coolant flow channel of the heater core 28 is connected to the inlet of the first coolant flow channel. When the cabin needs to be heated, and the temperature of the coolant flowing through the electric heater 15 in the heater thermal management subsystem is high, the cabin air flow fan drives the air flow through the heater core 28, blowing the heat of the coolant flowing through the heater core 28 into the cabin, thereby heating the cabin.

[0096] like Figure 3As shown, in the embodiment of the present disclosure, the heat pump subsystem may also include an outdoor heat exchanger 29, a first stop valve 30 and a one-way valve 31; the inlet of the refrigerant flow channel of the outdoor heat exchanger 29 is connected to the outlet of the refrigerant flow channel of the water-cooled condenser 12; the outlet of the refrigerant flow channel of the outdoor heat exchanger 29 is connected to the inlet of the one-way valve 31; the outlet of the one-way valve 31 is connected to the inlet of the refrigerant flow channel of the first throttle valve 13; the two ends of the first stop valve 30 are respectively connected to the outlet of the refrigerant flow channel of the water-cooled condenser 12 and the inlet of the refrigerant flow channel of the first throttle valve 13.

[0097] When the first shut-off valve 30 is open, the refrigerant flowing through the water-cooled condenser 12 can directly enter the battery-side evaporator 14 through the first shut-off valve 30. At this time, due to the reverse shut-off effect of the one-way valve 31, the refrigerant will not enter the outdoor heat exchanger 29 through the one-way valve 31. This is often used in low ambient temperatures and requires full heat recovery and utilization.

[0098] When first shut-off valve 30 is open, the refrigerant flowing through water-cooled condenser 12 can flow through outdoor heat exchanger 29 to continue dissipating heat, further releasing heat and increasing the refrigerant's supercooling. The refrigerant can then flow through check valve 31 into battery-side evaporator 14, achieving battery cooling management. This is often used in operating conditions where the ambient temperature is high and sufficient heat dissipation is required.

[0099] like Figure 3 As shown, the heat pump subsystem can also include a second throttle valve 32 and a second stop valve 33; the inlet of the refrigerant flow channel of the second throttle valve 32 is directly connected to the outlet of the refrigerant flow channel of the water-cooled condenser 12, and the outlet of the refrigerant flow channel of the second throttle valve 32 is connected to the inlet of the refrigerant flow channel of the outdoor heat exchanger 29; the two ends of the second stop valve 33 are respectively connected to the outlet of the refrigerant flow channel of the outdoor heat exchanger 29 and the inlet of the refrigerant flow channel of the compressor 11.

[0100] When the ambient temperature is low but the phase change characteristics of the refrigerant can still be used to collect ambient heat, by controlling the first stop valve 30 to close, the second stop valve 33 to open, and the second throttle valve 32 to an appropriate opening, the refrigerant flowing out of the water-cooled condenser 12 can be throttled to a low-pressure refrigerant, then enter the outdoor heat exchanger 29 to absorb heat and evaporate, and then vaporize into gaseous refrigerant. The gaseous refrigerant then flows back to the compressor 11 after passing through the second stop valve 33.

[0101] See further Figure 3In the disclosed embodiment, the heat pump subsystem may further include a third throttle valve and a cabin evaporator. The refrigerant flow inlet of the third throttle valve communicates with the refrigerant flow outlet of the first cabin shut-off valve 30, the refrigerant flow outlet of the third throttle valve communicates with the refrigerant flow inlet of the cabin evaporator, and the refrigerant flow outlet of the cabin evaporator communicates with the refrigerant flow inlet of the compressor 11. By controlling the third throttle valve to throttle the refrigerant, the refrigerant entering the cabin evaporator absorbs heat and evaporates there, thereby cooling the airflow within the cabin and achieving cabin cooling.

[0102] like Figure 3 As shown, to achieve gas-liquid separation of the refrigerant, the heat pump subsystem is further provided with a gas-liquid separator 34. The refrigerant inlet of the gas-liquid separator 34 is used to communicate with the outlets of each of the aforementioned refrigerant circuits, and the refrigerant outlet of the gas-liquid separator 34 is connected to the refrigerant flow channel inlet of the compressor 11. In addition, the thermal management system is also provided with an expansion tank 35 for each coolant circulation circuit to use the expansion tank 35 to carry excess coolant.

[0103] In addition, in order to achieve cooling of the cabin, the heat pump subsystem also includes a third throttle valve 37 and a cabin evaporator 38. The refrigerant flow channel inlet of the third throttle valve 37 is connected to the refrigerant flow channel outlet of the first stop valve 30, and the refrigerant flow channel outlet of the cabin evaporator 38 is connected to the refrigerant inlet of the compressor 11 through the gas-liquid separator 34.

[0104] like Figure 3 The thermal management system shown is applied to a system that may include an engine as a power source or a power generation source. In this case, in order to fully utilize the heat generated by the generator to heat other parts of the vehicle, the aforementioned second three-way valve 24, internal combustion engine water channel 25, engine radiator 26 and thermostat 27 are provided.

[0105] Figure 4 This is a schematic diagram of the thermal management system used in pure electric vehicles. Figure 4 As shown, since there is no engine in the pure electric vehicle, there is no need to set the second three-way valve 24, the internal combustion engine water channel 25, the engine radiator 26 and the thermostat 27. It is only necessary to directly connect the coolant flow channel of the water-cooled condenser 12 and the coolant flow channel of the electric heater.

[0106] In addition to providing the aforementioned thermal management system, the embodiments of the present disclosure also provide a control method for the aforementioned thermal management system. Figure 5 This is a flow chart of the control method of the thermal management system provided by the embodiment of the present disclosure. Figure 5 As shown, the thermal management system control method provided by the embodiment of the present disclosure includes S110-S120.

[0107] S110: Determine that the thermal management system needs to start the compressor but the compressor is turned on with limited start protection, control the thermal management system to form a state including a refrigerant circuit, a first coolant circuit, and a second coolant circuit, and start the electric heater for heating.

[0108] As previously analyzed, when the thermal management system needs to start the compressor 11, but the compressor 11 is in the state of limited start protection, the thermal management system can control the refrigerant flow path of the compressor 11, the water-cooled condenser 12, the first throttle valve 13 and the battery-side evaporator 14 to be connected in series to form a refrigerant circuit, control the coolant flow path of the water-cooled condenser 12, the coolant flow path of the electric heater 15 and the first coolant flow path to be connected in series to form a first coolant circuit, control the second coolant flow path and the coolant flow path of the battery-side evaporator 14 to be connected in series to form a second coolant circuit, and control the water pumps in the two aforementioned coolant circuits to achieve the circulation of the refrigerant. It should be noted here that generally, when the compressor is in an ultra-low temperature condition but the cold machine is started, it will turn on the limited start protection.

[0109] Then the electric heater 15 in the thermal management system generates heat, so that the coolant flowing through it is heated. Then the coolant flowing through the electric heater 15 flows into the first coolant flow channel of the battery side radiator 16. The coolant in the first coolant flow channel transfers heat to the coolant in the second coolant flow channel through the battery side radiator 14. When the coolant in the second coolant flow channel flows through the battery side evaporator 14, it transfers heat to the refrigerant through the battery side evaporator 14, so that the refrigerant absorbs heat and vaporizes, and flows back to the air inlet of the compressor 11 in the form of a gaseous refrigerant as much as possible. In a specific implementation, when the compressor is turned on with limited start protection, the electric heater 15 can work at full power, so that the refrigerant flowing through the battery side evaporator can be fully vaporized. In actual application, the vaporized refrigerant flows through the gas-liquid separator, and after gas-liquid separation, the gaseous refrigerant flows into the air inlet of the compressor 11.

[0110] S120: It is detected that the restricted start protection of the compressor is released, and the compressor is started.

[0111] Because the refrigerant flowing into the compressor air inlet is fully vaporized, more gaseous refrigerant can be supplied to the compressor. At this time, the compressor's restricted start protection can be released, and the compressor can be started, and the compressor can be used to provide heat for the entire system.

[0112] In practice, the electric heater's heating can be adaptively reduced or stopped based on the compressor's compression work and the overall system's heating needs. Because the compressor's compression work allows for full heat recovery and utilization, this approach can reduce the overall energy consumption of the thermal management system compared to using only or exclusively electric heaters for heating.

[0113] In addition to providing the aforementioned thermal management system, the embodiments of the present disclosure also provide a control method for the aforementioned thermal management system. Figure 5 is a flow chart of a thermal management system control method provided by an embodiment of the present disclosure, such as Figure 5 As shown, the thermal management system control method includes S510.

[0114] S510: In response to receiving the start instruction of the ultra-low temperature working mode and determining that the compressor starts the restricted start protection, the refrigerant circuit, the first coolant circuit and the second coolant circuit are controlled to be connected respectively, and the electric heater is started for heating until the restricted start protection of the compressor is released.

[0115] In the disclosed embodiment, if the vehicle is in an ultra-low temperature condition, the compressor 11 starts the restricted start protection due to the excessively low temperature. At this time, when the thermal management system receives the demand for heating the vehicle cabin, that is, when it receives the start instruction, the thermal management system controls the aforementioned thermal management system so that the refrigerant flow path of the compressor 11, the water-cooled condenser 12, the first throttle valve 13 and the battery-side evaporator 14 are connected in series to form a refrigerant circuit, and the coolant flow path of the water-cooled condenser 12, the coolant flow path of the electric heater 15 and the first coolant flow path are connected in series to form a first coolant circuit, and the second coolant flow path and the coolant flow path of the battery-side evaporator 14 are connected in series to form a second coolant circuit. In addition, the thermal management system enables the electric heater 15 to start heating the coolant flowing therethrough.

[0116] As analyzed above, after the coolant is heated in the battery-side radiator, it enters the coolant flow channel of the battery-side evaporator 14. Since the coolant temperature is significantly higher than the temperature of the liquid refrigerant. In the battery-side evaporator 14, the heat carried by the coolant is transferred to the refrigerant in the refrigerant flow channel via the battery-side evaporator 14. The liquid refrigerant in the refrigerant flow channel absorbs heat and evaporates, becoming a gaseous refrigerant. When the liquid refrigerant absorbs heat in the battery-side evaporator 14 and becomes a gaseous refrigerant, and there is enough gaseous refrigerant to supply the heat pump subsystem compressor 11, the compressor 11 can start, generate heat by compression work, and make the gaseous refrigerant a high-temperature gaseous refrigerant by the compressor 11. In other words, by adopting the thermal management system control method provided in the embodiment of the present disclosure, the startup protection of the compressor 11 can be released by vaporizing the refrigerant, so that the compressor 11 can generate heat by compression work, thereby achieving the entire thermal management system to meet the heating demand as much as possible through the work of the compressor 11.

[0117] In some embodiments, after the compressor 11 startup protection is released, the thermal management system control method may further proceed to S520 as follows.

[0118] S520: In response to receiving the start instruction of the cabin dehumidification mode, the first stop valve 30 is controlled to open, and the third throttle valve 37 is controlled to open the refrigerant throttling control to achieve heat absorption and evaporation of the refrigerant compressed by the compressor 11 in the cabin evaporator.

[0119] If a command to activate cabin dehumidification mode is received, it's likely due to excessive cabin humidity, necessitating dehumidification. Dehumidification requires cooling the cabin air (as it flows through the cabin evaporator 38) via the cabin evaporator 38. This lowers the dew point of the cabin air, causing moisture to condense and separate out. To achieve this, in the disclosed embodiment, the first shut-off valve 30 is controlled to open, and the third throttle valve 37 is controlled to activate refrigerant throttling control. This allows the refrigerant to expand and absorb heat within the cabin evaporator 38 after passing through the first and third shut-off valves 30, 37, lowering the surface temperature of the cabin evaporator 38 and condensing moisture from the cabin air, thereby achieving cabin dehumidification.

[0120] In some applications of the present disclosure, the vehicle is a hybrid vehicle or a range-extended vehicle including an internal combustion engine, in which case it has Figure 3 The control method of the thermal management system may further include the following steps S530-S550.

[0121] S530: Detect the water temperature of the internal combustion engine water channel and determine whether the water channel temperature is higher than or equal to the set temperature; if so, execute S540; if not, execute S550.

[0122] S540: Control the first port and the second port of the third three-way valve to communicate with each other, so that the internal combustion engine water channel is merged into the first coolant circuit.

[0123] S550: Control the first port and the third port of the third three-way valve to communicate with each other, so as to prevent the internal combustion engine water channel from being merged into the first coolant circuit.

[0124] In a specific application, if the internal combustion engine is in a hot engine state just after starting, its temperature has not reached the efficient temperature range. In order to make the internal combustion engine reach the efficient temperature range as quickly as possible, the coolant in the internal combustion engine water channel 25 is self-circulated by controlling the thermostat. At this time, in order to avoid delaying the heating rate of the internal combustion engine, it is necessary to control the first port and the third port of the third three-way valve 24 to be connected, so as to prevent the internal combustion engine water channel 25 from being incorporated into the first coolant circuit, so that the coolant therein circulates to other components to release heat. When the coolant temperature in the internal combustion engine water channel 25 rises to the set temperature, it is determined that the internal combustion engine has entered the efficient temperature range. At this time, the internal combustion engine water channel 25 can be incorporated into the first coolant circuit, and the coolant can be used to absorb the heat generated by the internal combustion engine and transfer it to other heat-requiring components.

[0125] In addition to providing the aforementioned thermal management system control method, embodiments of the present disclosure also provide a thermal management system control device. The thermal management system control device provided by embodiments of the present disclosure includes a control unit. The control unit is configured to, in response to receiving a command to activate an ultra-low temperature operating mode and determining that the compressor is activated with restricted startup protection, control the refrigerant circuit, the first coolant circuit, and the second coolant circuit to communicate with each other, and activate the electric heater to generate heat until the restricted startup protection of the compressor is released.

[0126] In some applications, the control unit is also used to control the first stop valve to open and the third throttle valve 3713 to open the refrigerant throttling control in response to receiving the start instruction of the cabin dehumidification mode after the compressor start protection is released, so as to realize the heat absorption and evaporation of the refrigerant compressed by the compressor 11 in the cabin evaporator.

[0127] In some applications, the control unit determines an operating state of the third three-way valve based on a water channel temperature of the internal combustion engine water channel. Specifically, if the water channel temperature is greater than or equal to a set temperature, the control unit controls the first port and the second port of the third three-way valve to communicate with each other so that the internal combustion engine water channel is integrated into the first coolant circuit. Furthermore, if the water channel temperature is less than the set temperature, the control unit controls the first port and the third port of the third three-way valve to communicate with each other so that the internal combustion engine water channel is not integrated into the first coolant circuit.

[0128] The present disclosure also provides a control device. Figure 6 Schematic diagram of the structure of the control device provided by the embodiment of the present disclosure. Figure 6 As shown, the control device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 into a random access memory (RAM) 603. RAM 603 also stores various programs and data required for the operation of vehicle control device 600. Processing device 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to bus 604.

[0129] Typically, the following devices may be connected to the I / O interface 605: an input device 605 including, for example, a touch screen, a touchpad, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the vehicle control device 600 to communicate with other devices wirelessly or by wire to exchange data. Figure 6The vehicle control apparatus 600 is shown with various devices, but it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed instead.

[0130] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 409, or installed from the storage device 408, or installed from the ROM 402. When the computer program is executed by the processing device 401, the above-mentioned functions defined in the method of the embodiment of the present disclosure are performed.

[0131] It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device, or component. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wires, optical cables, RF (radio frequency), etc., or any suitable combination thereof.

[0132] In some embodiments, the client and server can communicate using any known or future developed network protocol, such as HTTP (HyperText Transfer Protocol), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any known or future developed network.

[0133] The computer-readable medium may be included in the vehicle control device, or may exist independently without being incorporated into the vehicle control device.

[0134] In addition to providing the aforementioned thermal management system, the embodiment of the present disclosure also provides a vehicle. The vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended range vehicle. In the case of a hybrid vehicle, it can directly adopt Figure 3 In the case of a pure electric vehicle, it can adopt the following thermal management system. Figure 4 The vehicle also includes a controller that controls the thermal management system to operate according to the aforementioned control method to start the compressor for heating.

[0135] The foregoing are merely specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not to be limited to the embodiments described herein, but is to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A thermal management system, characterized in that: It includes a compressor, a water-cooled condenser, a first throttle valve, a battery-side evaporator, an electric heater, and a battery-side radiator; The compressor, the water-cooled condenser, the first throttle valve, and the refrigerant flow passage of the battery-side evaporator may be sequentially connected in series to form a refrigerant circuit; The battery side radiator includes a first coolant flow channel and a second coolant flow channel; The coolant flow channel of the water-cooled condenser, the coolant flow channel of the electric heater and the first coolant flow channel can be connected in series to form a first coolant circuit; The second coolant flow channel and the coolant flow channel of the battery-side evaporator may be connected in series to form a second coolant circuit.

2. The thermal management system according to claim 1, wherein: Also included is a liquid cooling plate and a first three-way valve; The first interface of the cooling liquid channel of the liquid cooling plate is in communication with the first port of the first three-way valve; The first interface of the second coolant flow channel is in communication with the second port of the first three-way valve; The first interface of the battery-side evaporator coolant flow channel is connected to the third port of the first three-way valve; The second interface of the battery-side evaporator coolant flow channel is in communication with the second interface of the liquid-cooling plate coolant flow channel and the second interface of the second coolant flow channel.

3. The thermal management system according to claim 2, wherein: Also included is a first water pump; The first interface of the first water pump coolant flow channel is connected to the second interface of the battery side evaporator coolant flow channel; The second interface of the first water pump coolant flow channel is communicated with the second interface of the liquid cooling plate coolant flow channel and the second interface of the second coolant flow channel.

4. The thermal management system according to claim 2, wherein: Also included is an electric drive unit and a first valve; The outlet of the first valve is in communication with the inlet of the coolant flow channel of the electric drive unit; The first inlet of the first valve is in communication with the third port of the first three-way valve; The outlet of the electric drive unit coolant flow channel is communicated with the second interface of the battery side evaporator coolant flow channel.

5. The thermal management system according to claim 4, characterized in that: Also includes an electric drive radiator; the first valve also includes a second inlet that cannot be connected to the first inlet and its own outlet at the same time; The inlet of the coolant flow channel of the electric drive radiator is communicated with the outlet of the coolant flow channel of the electric drive unit, and the outlet of the coolant flow channel of the electric drive radiator is communicated with the second inlet.

6. The thermal management system according to any one of claims 1 to 5, characterized in that: Also included is a second three-way valve and an internal combustion engine water channel; The first port of the second three-way valve is in communication with the outlet of the coolant flow channel of the water-cooled condenser and the inlet of the water channel of the internal combustion engine; The second port of the second three-way valve is connected to the outlet of the internal combustion engine water channel; The third port of the second three-way valve is in communication with the inlet of the coolant flow channel of the electric heater.

7. The thermal management system according to any one of claims 1 to 5, characterized in that: Also includes heater core; The inlet of the heater core coolant flow channel is communicated with the outlet of the electric heater coolant flow channel, and the outlet of the heater core coolant flow channel is communicated with the inlet of the first coolant flow channel.

8. The thermal management system according to claims 1-5, characterized in that: It also includes an outdoor heat exchanger, a first stop valve and a one-way valve; The inlet of the refrigerant flow channel of the outdoor heat exchanger is connected to the outlet of the refrigerant flow channel of the water-cooled condenser; The outlet of the refrigerant flow channel of the outdoor heat exchanger is connected to the inlet of the one-way valve; The outlet of the one-way valve is in communication with the inlet of the refrigerant flow channel of the first throttle valve; Both ends of the first stop valve are respectively connected to the refrigerant flow channel outlet of the water-cooled condenser and the refrigerant flow channel inlet of the first throttle valve.

9. The thermal management system according to claim 8, characterized in that: Also included is a second throttle valve and a second stop valve; The inlet of the refrigerant flow channel of the second throttle valve is directly connected to the outlet of the refrigerant flow channel of the water-cooled condenser, and the outlet of the refrigerant flow channel of the second throttle valve is connected to the inlet of the refrigerant flow channel of the outdoor heat exchanger; Both ends of the second stop valve are respectively connected to the outlet of the refrigerant flow channel of the outdoor heat exchanger and the inlet of the refrigerant flow channel of the compressor.

10. A thermal management system control method, characterized in that: Used to control the thermal management system according to any one of claims 1 to 9; characterized in that it comprises: In response to receiving the start-up instruction of the ultra-low temperature working mode and determining that the compressor starts the restricted start protection, the refrigerant circuit, the first coolant circuit and the second coolant circuit are controlled to be connected respectively, and the electric heater is started for heating until the restricted start protection of the compressor is released.

11. The method according to claim 10, characterized in that After the compressor startup protection is released, in response to receiving the start-up instruction of the cabin dehumidification mode, the first stop valve is controlled to open, and the third throttle valve is controlled to open the refrigerant throttling control to achieve heat absorption and evaporation of the refrigerant compressed by the compressor in the cabin evaporator.

12. The method according to claim 10, characterized in that Also includes: Detect the water channel temperature of the internal combustion engine; Determining that the water channel temperature is higher than or equal to a set temperature, controlling the first port and the second port of the third three-way valve to communicate with each other so that the internal combustion engine water channel is merged into the first coolant circuit; and It is determined that the water channel temperature is lower than the set temperature, and the first port and the third port of the third three-way valve are controlled to communicate with each other to prevent the internal combustion engine water channel from being merged into the first coolant circuit.

13. A thermal management system control device, characterized in that: Used to control the thermal management system according to any one of claims 1 to 9; characterized in that it comprises: A control unit is used to respond to receiving a start instruction of the ultra-low temperature working mode and determining that the compressor starts the restricted start protection, control the refrigerant circuit, the first coolant circuit and the second coolant circuit to be connected respectively, and start the electric heater for heating until the restricted start protection of the compressor is released.

14. A control device, characterized in that: comprising a processor and a memory, said memory being configured to store a computer program; When the computer program is loaded by the processor, the processor executes the thermal management system control method according to any one of claims 10 to 12.

15. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by the processor, the processor implements the thermal management system control method according to any one of claims 10 to 12.

16. A vehicle, characterized in that: The thermal management system comprises at least one of the thermal management system according to any one of claims 1 to 9, the control device according to claim 14, and the computer-readable storage medium according to claim 15.

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