A temperature control method based on a vehicle thermal management system and a vehicle

Abstract

The application provides a temperature control method based on a vehicle thermal management system and an automobile. The vehicle thermal management system comprises a cooling liquid circuit and a refrigerant circuit. The method comprises the following steps: obtaining a temperature control request, and determining a temperature control mode matched with a battery and / or a passenger cabin in the vehicle thermal management system according to the temperature control request, environment information and current state information of the vehicle thermal management system; in the matched temperature control mode, controlling the cooling liquid circuit to perform heating treatment by using electric drive waste heat or an auxiliary heating circuit; and / or controlling the refrigerant circuit to perform refrigeration and / or heating treatment. The problem that the temperature control effect of the existing thermal management system of a new energy automobile is poor and even cannot run is solved.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a temperature control method based on a vehicle thermal management system and a vehicle. Background Technology

[0002] Currently, new energy vehicles generally use a thermal management system to control the temperature of the passenger compartment and battery. Upon receiving a temperature control request from the passenger compartment, the system controls the refrigerant circuit to cool or heat the passenger compartment; upon receiving a temperature control request from the battery, the system controls the refrigerant circuit or coolant circuit to heat or cool the battery.

[0003] However, simply responding to temperature control requests may result in the current operating mode being unsuitable for the current ambient temperature or vehicle operating status, thus affecting the effectiveness of temperature control. In complex situations where both the passenger compartment and battery require temperature control simultaneously, contradictory operating modes may arise, such as controlling the refrigerant circuit to cool the battery while simultaneously controlling it to heat the passenger compartment. This can cause malfunctions in the various cooling or heating components of the thermal management system, or even render the thermal management system inoperable. Summary of the Invention

[0004] This application provides a temperature control method and a vehicle based on an automotive thermal management system, which solves the problem of poor temperature control performance or even inoperability of the thermal management system in existing new energy vehicles.

[0005] In a first aspect, this application provides a temperature control method based on a vehicle thermal management system, the vehicle thermal management system including: a coolant circuit and a refrigerant circuit; wherein, the method includes: acquiring a temperature control request, and determining a temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system according to the temperature control request, as well as environmental information and current status information of the vehicle thermal management system; under the matching temperature control mode, controlling the coolant circuit to perform heating treatment using waste heat from electric drive or an auxiliary heating circuit; and / or controlling the refrigerant circuit to perform cooling and / or heating treatment.

[0006] In one specific implementation, when the temperature control request is obtained from the battery thermal management system and the temperature control request is a cooling control request, then in the matched temperature control mode, controlling the coolant circuit to use the waste heat from the electric drive or the auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: in the matched battery cooling mode, triggering the first, fourth, and sixth shut-off valves on the refrigerant circuit to open, the second, third, and fifth shut-off valves to close, the evaporator inlet electronic expansion valve to close, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to open, so that the refrigerant circuit cools the battery cooling circuit through the battery cooler; the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the battery cooling mode.

[0007] In one specific implementation, when the temperature control request is obtained from the battery thermal management system and the temperature control request is a heating control request, determining the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system based on the temperature control request, as well as the environmental information and current status information of the vehicle thermal management system, includes: obtaining the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system based on the temperature control request; and determining the temperature control mode matching the battery in the vehicle thermal management system based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system.

[0008] In one specific embodiment, determining the battery-matched temperature control mode in the vehicle thermal management system based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system includes: when the coolant temperature is less than a coolant temperature threshold, determining the temperature control mode as a first battery heating mode; then, in the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: respectively triggering the second, third, and fifth shut-off valves on the refrigerant circuit to open, the first, fourth, and sixth shut-off valves to close, the evaporator inlet electronic expansion valve to close, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to open, so that the refrigerant circuit heats the battery cooling circuit through the battery cooler; the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the first battery heating mode.

[0009] In one specific embodiment, determining the battery-matched temperature control mode in the vehicle thermal management system based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system includes: when the coolant temperature is greater than or equal to a coolant temperature threshold, determining the temperature control mode as a second battery heating mode; then, in the matched temperature control mode, controlling the coolant circuit to utilize the waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating, including: triggering the first and second channels of the four-way valve on the coolant circuit to open, and the second channel of the first three-way water valve to open; using the waste heat from the electric drive generated by the electric drive module on the coolant circuit to heat the coolant, so that the heated coolant heats the battery in the battery cooling circuit.

[0010] In one specific implementation, when the temperature control request is obtained from the air conditioning system, determining the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system based on the temperature control request, the environmental information and current status information of the vehicle thermal management system, includes: obtaining the ambient temperature of the vehicle thermal management system based on the temperature control request; and determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system.

[0011] In one specific embodiment, determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: when the temperature control request is a cooling request and the ambient temperature is greater than a first ambient temperature threshold, determining the temperature control mode as a passenger compartment cooling mode; then, in the matched temperature control mode, controlling the coolant circuit to use the waste heat from the electric drive or the auxiliary heating circuit for heating treatment; and / or controlling the refrigerant circuit for cooling and / or heating treatment includes: respectively triggering the first, fourth, and sixth shut-off valves on the refrigerant circuit to open, the second, third, and fifth shut-off valves to close, the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to open, and the battery cooler inlet electronic expansion valve to close, so that the refrigerant circuit cools the passenger compartment; the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the passenger compartment cooling mode.

[0012] In one specific embodiment, determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: when the temperature control request is a heating request and the ambient temperature is less than a second ambient temperature threshold, determining the temperature control mode as a passenger compartment heating mode; then, in the matched temperature control mode, controlling the coolant circuit to use the waste heat from the electric drive or the auxiliary heating circuit for heating treatment; and / or controlling the refrigerant circuit for cooling and / or heating treatment includes: respectively triggering the second, third, and fifth shut-off valves on the refrigerant circuit to open, the first, fourth, and sixth shut-off valves to close, the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to open, and the battery cooler inlet electronic expansion valve to close, so that the refrigerant circuit heats the passenger compartment; the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the passenger compartment heating mode.

[0013] In one specific embodiment, determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: when the temperature control request is a dehumidification request and the ambient temperature is greater than a third ambient temperature threshold, determining the temperature control mode as a high-temperature dehumidification mode for the passenger compartment; then, under the matching temperature control mode, controlling the coolant circuit to use the waste heat from the electric drive or the auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: respectively triggering the first, fourth, and sixth shut-off valves on the refrigerant circuit to open, the second, third, and fifth shut-off valves to close, the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to open, and the battery cooler inlet electronic expansion valve to close, so that the refrigerant circuit cools the passenger compartment; the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the high-temperature dehumidification mode of the passenger compartment; triggering the first channel of the second three-way water valve to open, so that the auxiliary heating circuit heats the passenger compartment.

[0014] In one specific embodiment, determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: when the temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to a fourth ambient temperature threshold and less than a third ambient temperature threshold, determining the temperature control mode as a passenger compartment medium-temperature dehumidification mode; then, in the matched temperature control mode, controlling the coolant circuit to use the waste heat from the electric drive or the auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: respectively triggering the second and fourth shut-off valves on the refrigerant circuit to open, the first, third, fifth, and sixth shut-off valves to close, the evaporator inlet electronic expansion valve to open, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to close, so that the refrigerant circuit cools the passenger compartment through the evaporator and heats the passenger compartment through the internal air cooler; the evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the passenger compartment medium-temperature dehumidification mode.

[0015] In one specific embodiment, determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: when the temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to a fifth ambient temperature threshold and less than a fourth ambient temperature threshold, determining the temperature control mode as a low-temperature dehumidification mode for the passenger compartment; then, under the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating, including: respectively touching... The second and fourth shut-off valves on the refrigerant circuit are open, while the first, third, fifth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is open, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are closed, so that the refrigerant circuit cools the passenger compartment through the evaporator and heats the passenger compartment through the internal air cooler. The evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the low-temperature dehumidification mode of the passenger compartment. The first channel of the second three-way water valve is triggered to open, so that the auxiliary heating circuit provides auxiliary heating to the passenger compartment.

[0016] In one specific implementation, when the temperature control request is obtained from a first temperature control request from a battery thermal management system and a second temperature control request from an air conditioning system, the step of determining the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system based on the temperature control request, the environmental information and current status information of the vehicle thermal management system, includes: obtaining the ambient temperature of the vehicle thermal management system, the vehicle speed of the vehicle to which the vehicle thermal management system belongs, and the status information of the air conditioning system based on the temperature control request; and determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed of the vehicle to which the vehicle thermal management system belongs, and the status information of the air conditioning system.

[0017] In one specific implementation, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when both the first temperature control request and the second temperature control request are cooling requests, and the ambient temperature is greater than a first ambient temperature threshold, determining the temperature control mode as a first hybrid temperature control mode; then, under the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating treatment; and / or controlling the... The refrigerant circuit performs cooling and / or heating processes, including: triggering the first, fourth, and sixth shut-off valves on the refrigerant circuit to open, closing the second, third, and fifth shut-off valves, and opening the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve, so that the refrigerant circuit cools the passenger compartment and cools the battery cooling circuit through the battery cooler; the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the first mixed temperature control mode.

[0018] In one specific implementation, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when the first temperature control request is a cooling request, the second temperature control request is a heating request, and the ambient temperature is less than a second ambient temperature threshold, determining the temperature control mode as a second hybrid temperature control mode; then, in the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating treatment; and / or Alternatively, the refrigerant circuit can be controlled for cooling and / or heating, including: triggering the second, third, fourth, and sixth shut-off valves on the refrigerant circuit to open, closing the first and fifth shut-off valves, closing the evaporator inlet electronic expansion valve, and opening the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve, so that the refrigerant circuit heats the passenger compartment through the internal air cooler and cools the battery cooling circuit through the battery cooler; the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the second mixed temperature control mode.

[0019] In one specific embodiment, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than a third ambient temperature threshold, determining the temperature control mode as a third mixed temperature control mode; then, in the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating, including... This includes: triggering the first, fourth, and sixth shut-off valves on the refrigerant circuit to open, and the second, third, and fifth shut-off valves to close; and opening the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve, so that the refrigerant circuit cools the passenger compartment through the evaporator and the battery cooling circuit through the battery cooler; adjusting the opening degree of the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve according to the opening degree corresponding to the third mixed temperature control mode; and triggering the first channel of the second three-way water valve to open, so that the auxiliary heating circuit heats the passenger compartment.

[0020] In one specific embodiment, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to a fourth ambient temperature threshold and less than a third ambient temperature threshold, the temperature control mode is determined to be a fourth mixed temperature control mode; then, in the matched temperature control mode, the coolant circuit is controlled to utilize waste heat from the electric drive or an auxiliary heating circuit for heating treatment; and / or control the refrigerant circuit for cooling and / or heating, including: triggering the second and fourth shut-off valves on the refrigerant circuit to open, closing the first, third, fifth, and sixth shut-off valves, closing the external air cooler outlet electronic expansion valve, and opening the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve, so that the refrigerant circuit cools the passenger compartment through the evaporator, cools the battery cooling circuit through the battery cooler, and heats the passenger compartment through the internal air cooler; the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve are adjusted according to the opening degree corresponding to the fourth mixed temperature control mode.

[0021] In one specific embodiment, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to a fifth ambient temperature threshold and less than a fourth ambient temperature threshold, the temperature control mode is determined to be a fifth mixed temperature control mode; then, under the matched temperature control mode, the coolant circuit is controlled to use waste heat from the electric drive or an auxiliary heating circuit for heating; and / or the refrigerant circuit is controlled for cooling and / or heating. The process includes: triggering the second and fourth shut-off valves on the refrigerant circuit to open, closing the first, third, fifth, and sixth shut-off valves, opening the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve, and closing the external air cooler outlet electronic expansion valve, so that the refrigerant circuit cools the passenger compartment through the evaporator, cools the battery cooling circuit through the battery cooler, and heats the passenger compartment through the internal air cooler; the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve are adjusted according to the opening degree corresponding to the fifth mixed temperature control mode; triggering the first channel of the second three-way water valve to open, so that the auxiliary heating circuit provides auxiliary heating to the passenger compartment.

[0022] In one specific implementation, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when the first temperature control request is a cooling request, the second temperature control request is a heating request, the vehicle speed is less than a speed threshold, the heating duration of the air conditioning system is greater than a heating duration threshold, and the refrigerant temperature in the external air cooler is less than a refrigerant temperature threshold, the temperature control mode is determined to be a sixth hybrid temperature control mode; then, under the matched temperature control mode, the cooling... The cooling circuit utilizes waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controls the refrigerant circuit for cooling and / or heating, including: triggering the first, fourth, and sixth shut-off valves on the refrigerant circuit to open, the second, third, and fifth shut-off valves to close, the evaporator inlet electronic expansion valve to close, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve to open, so that the refrigerant circuit cools the battery cooling circuit through the battery cooler; the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the sixth mixed temperature control mode.

[0023] In one specific implementation, determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: when both the first temperature control request and the second temperature control request are heating requests, and the ambient temperature is less than a second ambient temperature threshold, determining the temperature control mode as a seventh hybrid temperature control mode; then, under the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling... The refrigerant circuit performs cooling and / or heating processes, including: triggering the second, third, and fifth shut-off valves on the refrigerant circuit to open, closing the first, fourth, and sixth shut-off valves, closing the evaporator inlet electronic expansion valve, and opening the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve, so that the refrigerant circuit heats the passenger compartment through the internal air cooler and heats the battery cooling circuit through the battery cooler; the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the seventh mixed temperature control mode.

[0024] In a second aspect, this application provides an electronic control unit, including: a processor, a memory, and a communication interface; the memory is used to store executable instructions of the processor; wherein the processor is configured to execute the temperature control method based on the vehicle thermal management system described in the first aspect by executing the executable instructions.

[0025] Thirdly, this application provides a new energy vehicle, including: an electronic control unit as described in the second aspect and a vehicle thermal management system.

[0026] This application provides a temperature control method and a vehicle based on an automotive thermal management system. The automotive thermal management system includes a coolant circuit and a refrigerant circuit. The method involves acquiring a temperature control request and, based on the request, environmental information, and current status information of the automotive thermal management system, determining a temperature control mode suitable for the battery and / or passenger compartment. Under this matched temperature control mode, the coolant circuit is controlled to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or the refrigerant circuit is controlled for cooling and / or heating. Compared to existing thermal management systems in new energy vehicles that only perform temperature control based on the temperature control request, this application, based on the acquired temperature control request and combined with the environmental information and current status information of the automotive thermal management system, determines a temperature control mode suitable for the battery and / or passenger compartment. Under this matched mode, the coolant circuit, auxiliary heating circuit, and refrigerant circuit are controlled for corresponding cooling and / or heating, enabling the automotive thermal management system to operate in a mode suitable for the current ambient temperature or vehicle operating status, effectively improving temperature control performance and ensuring the normal operation of the thermal management system. This solves the problem of poor temperature control in existing thermal management systems for new energy vehicles, which can even lead to malfunctions. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This application provides a schematic diagram of the structure of an automotive thermal management system.

[0029] Figure 2 A flowchart illustrating an embodiment of a temperature control method based on an automotive thermal management system provided in this application;

[0030] Figure 3 A schematic diagram of the structure of an embodiment of the vehicle thermal management system in battery cooling mode provided in this application;

[0031] Figure 4a A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the first battery heating mode provided in this application;

[0032] Figure 4b A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the second battery heating mode provided in this application;

[0033] Figure 5a A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the passenger compartment cooling mode provided in this application;

[0034] Figure 5b A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the passenger compartment heating mode provided in this application;

[0035] Figure 5c This is a schematic diagram of the structure of an embodiment of the vehicle thermal management system in the high-temperature dehumidification mode of the passenger compartment provided in this application;

[0036] Figure 5d A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the passenger compartment temperature and dehumidification mode provided in this application;

[0037] Figure 5e This is a schematic diagram of the structure of an embodiment of the vehicle thermal management system in the low-temperature dehumidification mode of the passenger compartment provided in this application;

[0038] Figure 6a A schematic diagram of the structure of an embodiment of the vehicle thermal management system under the first hybrid temperature control mode provided in this application;

[0039] Figure 6b A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the second hybrid temperature control mode provided in this application;

[0040] Figure 6c A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the third hybrid temperature control mode provided in this application;

[0041] Figure 6d A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the fourth hybrid temperature control mode provided in this application;

[0042] Figure 6e A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the fifth hybrid temperature control mode provided in this application;

[0043] Figure 6f A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the sixth hybrid temperature control mode provided in this application;

[0044] Figure 6g A schematic diagram of the structure of an embodiment of the vehicle thermal management system in the seventh hybrid temperature control mode provided in this application;

[0045] Figure 7 This is a schematic diagram of the structure of an electronic control unit provided in this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 101: Coolant circuit; 102: Refrigerant circuit; 103: Water-cooled air cooler; 104: Battery cooler; 201: Electric drive cooling circuit; 202: Battery cooling circuit; 203: Auxiliary heating circuit; 211: Coolant expansion tank; 221: Electric drive circuit water pump; 231: Integrated charger module; 241: Integrated electric drive and electronic control module; 251: First three-way water valve; 261: Radiator; 271: Four-way valve; 281: Manual vent valve; 212: Battery circuit water pump; 222: Battery; 213: High-pressure liquid heater; 223: Warm air circuit Circulating water pump; 233: Warm air heat exchanger; 243: Second three-way water valve; 301: External air cooler; 302: Internal air cooler; 303: Compressor; 304: Regenerator; 305: Gas-liquid separator; 306: First shut-off valve; 307: Second shut-off valve; 308: Third shut-off valve; 309: Fourth shut-off valve; 310: Fifth shut-off valve; 311: Sixth shut-off valve; 312: Battery cooler inlet electronic expansion valve; 313: Evaporator inlet electronic expansion valve; 314: External air cooler outlet electronic expansion valve; 315: Evaporator; 316: Blower. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments made by those skilled in the art under the guidance of these embodiments are within the scope of protection of this application.

[0049] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] First, let me explain the terms used in this application:

[0051] Battery cooler: Used in battery thermal management systems, it removes heat generated during battery operation through coolant or provides heat to the battery through coolant, keeping the battery within a suitable operating temperature range, thereby improving battery life.

[0052] In existing technologies, new energy vehicles generally use a thermal management system to control the temperature of the passenger compartment and the battery. Upon receiving a temperature control request for the passenger compartment, the system controls the refrigerant circuit to cool or heat the passenger compartment; upon receiving a temperature control request for the battery, the system controls the refrigerant circuit or coolant circuit to heat or cool the battery.

[0053] However, simply responding to temperature control requests may result in the current operating mode being unsuitable for the current ambient temperature or vehicle operating status, thus affecting the effectiveness of temperature control. In complex situations where both the passenger compartment and battery require temperature control simultaneously, contradictory operating modes may arise, such as controlling the refrigerant circuit to cool the battery while simultaneously controlling it to heat the passenger compartment. This can cause malfunctions in the various cooling or heating components of the thermal management system, or even render the thermal management system inoperable.

[0054] Based on the above-mentioned technical problems, the technical conception process of this application is as follows: How to provide a temperature control method that can be applied to the current ambient temperature or vehicle operating status, so as to improve the temperature control effect and ensure the normal operation of the thermal management system.

[0055] The technical solution of this application will now be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0056] Figure 1 This is a schematic diagram of a vehicle thermal management system provided in this application. Figure 1 As shown, the vehicle thermal management system includes: a coolant circuit 101, a refrigerant circuit 102, and a water-cooled air cooler 103 and a battery cooler 104 for heat exchange between the coolant and the refrigerant.

[0057] like Figure 1 As shown by the solid line, the coolant circuit 101 includes an electric drive cooling circuit 201, a battery cooling circuit 202, and an auxiliary heating circuit 203. Only coolant flows through the coolant circuit 101, which is mainly used to cool the integrated electric drive and control module and the integrated charger module, as well as to cool or heat the battery.

[0058] The electric drive cooling circuit 201 includes a coolant expansion tank 211, an electric drive circuit water pump 221, an integrated charger module 231, an integrated electric drive and control module 241, a first three-way water valve 251, a radiator 261, a four-way valve 271, and a manual exhaust valve 281.

[0059] The battery cooling circuit 202 includes a battery circuit water pump 212, a battery 222, a four-way valve 271, and a battery cooler 104.

[0060] The auxiliary heating circuit 203 includes a high-pressure liquid heater 213, a warm air circuit circulating water pump 223, a warm air heat exchanger 233, and a second three-way water valve 243.

[0061] like Figure 1 As shown, each three-way water valve includes three outlets. Exemplarily, the first channel of the first three-way water valve 251 is a passage between outlet 1 and outlet 2, and the second channel is a passage between outlet 1 and outlet 3; the first channel of the second three-way water valve 243 is a passage between outlet 2 and outlet 3, and the second channel is a passage between outlet 1 and outlet 3.

[0062] like Figure 1 As shown, the four-way valve 271 includes four outlets. The first channel of the four-way valve 271 is the passage between outlet 1 and outlet 2, the second channel is the passage between outlet 3 and outlet 4, the third channel is the passage between outlet 1 and outlet 4, and the fourth channel is the passage between outlet 2 and outlet 3.

[0063] like Figure 1 As shown by the dashed lines, the refrigerant circuit 102 includes an external air cooler 301, an internal air cooler 302, a compressor 303, a regenerator 304, a gas-liquid separator 305, a first shut-off valve 306, a second shut-off valve 307, a third shut-off valve 308, a fourth shut-off valve 309, a fifth shut-off valve 310, a sixth shut-off valve 311, a battery cooler inlet electronic expansion valve 312, an evaporator inlet electronic expansion valve 313, an external air cooler outlet electronic expansion valve 314, an evaporator 315, and a blower 316. Only refrigerant flows through the refrigerant circuit 102, primarily for cooling or heating the passenger compartment or battery cooler.

[0064] The vehicle thermal management system also includes a water-cooled air cooler 103, which includes channels for the flow of coolant and refrigerant, respectively, and the coolant and refrigerant can exchange heat in the water-cooled air cooler 103.

[0065] The vehicle thermal management system also includes a battery cooler 104. The battery cooler 104 includes channels for the flow of coolant and refrigerant, respectively, which can exchange heat to cool or heat the battery.

[0066] Figure 2 This is a schematic flowchart illustrating an embodiment of a temperature control method based on an automotive thermal management system provided in this application. See also... Figure 2 The temperature control method based on the vehicle thermal management system specifically includes the following steps:

[0067] Step S201: Obtain a temperature control request, and based on the temperature control request, as well as the environmental information and current status information of the vehicle thermal management system, determine the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system.

[0068] In this embodiment, the temperature control request may be a temperature control request obtained from the battery thermal management system, requesting cooling or heating of the battery; the temperature control request may also be a temperature control request obtained from the air conditioning system, requesting cooling, heating or dehumidification of the passenger compartment.

[0069] In this embodiment, environmental information may include the ambient temperature of the vehicle thermal management system, the humidity of the outside environment, and the intensity of light outside the vehicle; current status information may include the vehicle speed of the vehicle to which the vehicle thermal management system belongs, the current passenger compartment temperature, the current air conditioning system status, the current battery temperature, the current battery thermal management status, the current battery coolant temperature, the current electric drive module temperature, and the current electric drive circuit coolant temperature.

[0070] For example, the temperature control mode matching the passenger compartment in the vehicle thermal management system can be determined based on the ambient temperature of the vehicle thermal management system and the temperature control request obtained from the air conditioning system; the temperature control mode matching the battery in the vehicle thermal management system can be determined based on the coolant temperature of the electric drive cooling circuit and the temperature control request obtained from the battery thermal management system.

[0071] In this embodiment, different components in the vehicle thermal management system are heated, and different temperature control modes are matched. For example, the battery is cooled, matching a battery cooling mode; the passenger compartment is heated, matching a passenger compartment heating mode. The passenger compartment and battery are cooled simultaneously, matching a hybrid temperature control mode.

[0072] Step S202: In the matched temperature control mode, the coolant circuit is controlled to use the waste heat of the electric drive or the auxiliary heating circuit for heating; and / or the refrigerant circuit is controlled for cooling and / or heating.

[0073] In this embodiment, after obtaining the matching temperature control mode, the corresponding temperature control is performed by utilizing the cooling or heating components in the vehicle thermal management system.

[0074] For example, in battery heating mode, heat treatment can be performed using waste heat from the electric drive in the coolant circuit 101. Specifically, the waste heat generated by the electric drive module in the coolant circuit 101 is used to heat the coolant, so that the heated coolant heats the battery 222 in the battery cooling circuit 202. The electric drive module includes an integrated electric drive and control module 241 and an integrated charger module 231.

[0075] Specifically, when no temperature control request is received from either the battery thermal management system or the air conditioning system, the ventilation mode is activated, triggering the blower 316 to run, while the coolant circuit 101 and refrigerant circuit 102 remain inactive. At this time, the vehicle thermal management system only ventilates the passenger compartment.

[0076] In this embodiment, a temperature control request is acquired, and based on the temperature control request, as well as the environmental information and current status information of the vehicle thermal management system, a temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system is determined. Under this matched temperature control mode, the coolant circuit is controlled to utilize waste heat from the electric drive or the auxiliary heating circuit for heating; and / or the refrigerant circuit is controlled for cooling and / or heating. Compared to existing thermal management systems for new energy vehicles that only perform corresponding temperature control based on the temperature control request, this application, based on the acquired temperature control request and combined with the environmental information and current status information of the vehicle thermal management system, determines a temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system. Under this matched mode, the coolant circuit, auxiliary heating circuit, and refrigerant circuit are controlled for corresponding cooling and / or heating, enabling the vehicle thermal management system to operate in a mode suitable for the current ambient temperature or vehicle operating status, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0077] In the above Figure 2 Based on the illustrated embodiment, when the temperature control request is obtained from the battery thermal management system and the temperature control request is a cooling control request, the matched temperature control mode is the battery cooling mode. Therefore, a specific implementation of step S202 is as follows:

[0078] Step S2021: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit cools the battery cooling circuit through the battery cooler. The opening degree of the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the battery cooling mode.

[0079] In this embodiment, with Figure 3 For example, Figure 3 This is a schematic diagram of the vehicle thermal management system embodiment in battery cooling mode provided in this application. Referring to this schematic diagram, step S2021 is specifically implemented as follows: the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode. The evaporator inlet electronic expansion valve 313 is closed, while the battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are open, allowing the refrigerant circuit 102 to cool the battery cooler 104. In this mode, the coolant and refrigerant exchange heat in the battery cooler 104 to cool the battery cooling circuit 202, thereby cooling the battery 222. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 20%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 100%.

[0080] In this embodiment, by obtaining a cooling control request from the battery thermal management system, matching the battery cooling mode, and controlling the refrigerant circuit to cool the battery through the battery cooler, the temperature control effect is effectively improved, ensuring the normal operation of the thermal management system.

[0081] In the above Figure 2 Based on the illustrated embodiment, when the temperature control request is obtained from the battery thermal management system and the temperature control request is a heating control request, a specific implementation of step S201 above is as follows:

[0082] Step S2011: Based on the temperature control request, obtain the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system; based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system, determine the temperature control mode matched to the battery in the vehicle thermal management system.

[0083] When a heating control request is received from the battery thermal management system, the coolant temperature of the electric drive cooling circuit can be obtained, and the matching temperature control mode can be determined based on the coolant temperature.

[0084] More specifically, when the coolant temperature is below the coolant temperature threshold, the temperature control mode is determined to be the first battery heating mode; when the coolant temperature is greater than or equal to the coolant temperature threshold, the temperature control mode is determined to be the second battery heating mode. For example, the coolant temperature threshold is 30°C.

[0085] In the first battery heating mode, the coolant temperature in the electric drive cooling circuit is low and insufficient to heat the battery. In this case, a heat pump is used to heat the battery. One specific implementation of step S202 is as follows:

[0086] Step S2022: The second, third, and fifth shut-off valves on the refrigerant circuit are activated, while the first, fourth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit heats the battery cooling circuit through the battery cooler. The battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the first battery heating mode.

[0087] In this embodiment, with Figure 4a For example, Figure 4a This is a schematic diagram of the vehicle thermal management system embodiment in the first battery heating mode provided in this application. Referring to this schematic diagram, step S2022 is specifically implemented as follows: the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 are closed, and the refrigerant circuit 102 is in heating mode at this time. The evaporator inlet electronic expansion valve 313 is closed, while the battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are open, causing the refrigerant circuit 102 to heat the battery cooler 104. In this mode, the coolant and refrigerant exchange heat in the battery cooler 104 to heat the battery cooling circuit 202, thereby heating the battery 222. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 100%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 10%.

[0088] In the second battery heating mode, the coolant temperature in the electric drive cooling circuit is high, which can heat the battery. At this time, the waste heat of the electric drive is used to heat the battery. One specific implementation of step S202 is as follows:

[0089] Step S2023: Trigger the first and second channels of the four-way valve on the coolant circuit to open, and the second channel of the first three-way water valve to open; use the residual heat generated by the electric drive module on the coolant circuit to heat the coolant, so that the heated coolant can heat the battery on the battery cooling circuit.

[0090] In this embodiment, with Figure 4b For example, Figure 4bThis is a schematic diagram of the vehicle thermal management system embodiment provided in the second battery heating mode according to this application. Referring to this schematic diagram, step S2023 is specifically implemented as follows: Coolant supplied by the coolant expansion tank 211 is pressurized by the electric drive circuit water pump 221 and enters the integrated charger module 231 and the integrated electric drive and control module 241. The waste heat generated by the integrated charger module 231 and the integrated electric drive and control module 241 heats the coolant. The heated coolant enters the battery cooling circuit 202 through the second channel of the first three-way water valve 251 and the four-way valve 271 to heat the battery 222. At this time, the refrigerant circuit 102 is not working.

[0091] In this embodiment, when a heating control request is received from the battery thermal management system, a matching temperature control mode is determined based on the coolant temperature of the electric drive cooling circuit. Under the corresponding temperature control mode, the refrigerant circuit is controlled to heat the battery through the battery cooler, or the waste heat from the electric drive is used to heat the battery. This allows the vehicle thermal management system to operate in a mode suitable for the current vehicle operating state, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0092] In the above Figure 2 Based on the illustrated embodiment, when the temperature control request is obtained from the air conditioning system, one specific implementation of step S201 above is as follows:

[0093] Step S2012: Based on the temperature control request, obtain the ambient temperature of the vehicle thermal management system; based on the ambient temperature of the vehicle thermal management system, determine the temperature control mode matching the passenger compartment in the vehicle thermal management system.

[0094] When a temperature control request is received from the air conditioning system, the ambient temperature of the vehicle's thermal management system can be obtained, and the appropriate temperature control mode can be determined based on the ambient temperature.

[0095] More specifically, when the temperature control request is a cooling request and the ambient temperature is greater than a first ambient temperature threshold, the temperature control mode is determined to be the passenger cabin cooling mode. For example, the first ambient temperature threshold is 30°C.

[0096] In the crew cabin cooling mode, one specific implementation of step S202 is as follows:

[0097] Step S2024: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, while the battery cooler inlet electronic expansion valve is closed, so that the refrigerant circuit cools the passenger compartment. The opening degree of the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the refrigeration mode of the passenger compartment.

[0098] In this embodiment, with Figure 5a For example, Figure 5a This is a schematic diagram of the vehicle thermal management system embodiment in passenger compartment cooling mode provided in this application. Referring to this schematic diagram, step S2024 is specifically implemented as follows: the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The battery cooler inlet electronic expansion valve 312 is closed, while the evaporator inlet electronic expansion valve 313 and the external air cooler outlet electronic expansion valve 314 are open, allowing the refrigerant circuit 102 to cool the passenger compartment through the evaporator 315. Specifically, the opening degree of the evaporator inlet electronic expansion valve 313 can be 10%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 100%.

[0099] In this embodiment, when a cooling control request is received from the air conditioning system, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than the first ambient temperature threshold, the temperature control mode is determined to be the passenger compartment cooling mode. The refrigerant circuit is controlled to cool the passenger compartment through the evaporator, so that the vehicle thermal management system can operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0100] More specifically, when the temperature control request is a heating request and the ambient temperature is lower than a second ambient temperature threshold, the temperature control mode is determined to be the passenger compartment heating mode. For example, the second ambient temperature threshold is 0°C.

[0101] In the crew cabin heating mode, one specific implementation of step S202 is as follows:

[0102] Step S2025: The second, third, and fifth shut-off valves on the refrigerant circuit are activated, while the first, fourth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, while the battery cooler inlet electronic expansion valve is closed, so that the refrigerant circuit heats the passenger compartment. The opening of the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the opening degree corresponding to the passenger compartment heating mode.

[0103] In this embodiment, with Figure 5b For example, Figure 5bThis is a structural diagram of an embodiment of the vehicle thermal management system in passenger compartment heating mode provided in this application. Referring to this structural diagram, step S2025 is specifically implemented as follows: the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 are closed. The refrigerant circuit 102 is in heating mode at this time. The battery cooler inlet electronic expansion valve 312 is closed, while the evaporator inlet electronic expansion valve 313 and the external air cooler outlet electronic expansion valve 314 are open, allowing the refrigerant circuit 102 to heat the passenger compartment together through the internal air cooler 302 and the evaporator 315. Specifically, the opening degree of the evaporator inlet electronic expansion valve 313 can be 100%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 10%.

[0104] In this embodiment, when a heating control request is received from the air conditioning system, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than the second ambient temperature threshold, the temperature control mode is determined to be the passenger compartment heating mode. The refrigerant circuit is controlled to heat the passenger compartment through the internal air cooler and evaporator, so that the vehicle thermal management system can operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0105] More specifically, when the temperature control request is a dehumidification request, and the ambient temperature is greater than a third ambient temperature threshold, the temperature control mode is determined to be the passenger cabin high-temperature dehumidification mode. For example, the third ambient temperature threshold is 25°C.

[0106] In the high-temperature dehumidification mode of the crew cabin, one specific implementation of step S202 is as follows:

[0107] Step S2026: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, while the battery cooler inlet electronic expansion valve is closed, so that the refrigerant circuit cools the passenger compartment. The opening of the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the opening degree corresponding to the high-temperature dehumidification mode of the passenger compartment. The first channel of the second three-way water valve is activated, so that the auxiliary heating circuit heats the passenger compartment.

[0108] In this embodiment, with Figure 5c For example, Figure 5cThis is a structural diagram of an embodiment of the vehicle thermal management system in high-temperature dehumidification mode of the passenger compartment provided in this application. Referring to this structural diagram, step S2026 is specifically implemented as follows: the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The battery cooler inlet electronic expansion valve 312 is closed, while the evaporator inlet electronic expansion valve 313 and the external air cooler outlet electronic expansion valve 314 are open, allowing the refrigerant circuit 102 to cool the passenger compartment through the evaporator 315. Specifically, the opening degree of the evaporator inlet electronic expansion valve 313 can be 10%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 100%.

[0109] The first channel of the second three-way water valve 243 on the auxiliary heating circuit 203 is opened, allowing the auxiliary heating circuit 203 to use the heat generated by the high-pressure liquid heater 213 to heat the passenger compartment through the warm air heat exchanger 233. The refrigerant circuit 102 cools the passenger compartment, and the auxiliary heating circuit 203 heats the passenger compartment, achieving high-temperature dehumidification of the passenger compartment.

[0110] In this embodiment, when a dehumidification control request is received from the air conditioning system, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than the third ambient temperature threshold, the temperature control mode is determined to be the passenger compartment high-temperature dehumidification mode. The refrigerant circuit is controlled to cool the passenger compartment, and the auxiliary heating circuit is controlled to heat the passenger compartment. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0111] More specifically, when the temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fourth ambient temperature threshold and less than the third ambient temperature threshold, the temperature control mode is determined to be the passenger cabin temperature dehumidification mode. For example, the third ambient temperature threshold is 25°C, and the fourth ambient temperature threshold is 5°C.

[0112] In the crew cabin temperature and dehumidification mode, one specific implementation of step S202 is as follows:

[0113] Step S2027: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is activated, while the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are closed. This allows the refrigerant circuit to cool the passenger compartment through the evaporator and heat the passenger compartment through the internal air cooler. The evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the temperature dehumidification mode in the passenger compartment.

[0114] In this embodiment, with Figure 5d For example, Figure 5d This is a schematic diagram of the vehicle thermal management system embodiment provided in this application under medium-temperature dehumidification mode in the passenger compartment. Referring to this schematic diagram, step S2027 is specifically implemented as follows: the second shut-off valve 307 and the fourth shut-off valve 309 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the third shut-off valve 308, the fifth shut-off valve 310, and the sixth shut-off valve 311 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are closed, while the evaporator inlet electronic expansion valve 313 is open, so that the refrigerant circuit 102 heats the passenger compartment through the internal air cooler 302 and cools the passenger compartment through the evaporator 315, thereby achieving medium-temperature dehumidification of the passenger compartment. Specifically, the opening degree of the evaporator inlet electronic expansion valve 313 can be 20%.

[0115] In this embodiment, when a dehumidification control request is received from the air conditioning system, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than or equal to the fourth ambient temperature threshold and less than the third ambient temperature threshold, the temperature control mode is determined to be the passenger compartment medium-temperature dehumidification mode. The refrigerant circuit is controlled to cool the passenger compartment through the evaporator and heat the passenger compartment through the internal air cooler, so that the vehicle thermal management system can operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0116] More specifically, when the temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fifth ambient temperature threshold and less than the fourth ambient temperature threshold, the temperature control mode is determined to be the passenger cabin low-temperature dehumidification mode. For example, the fourth ambient temperature threshold is 5°C, and the fifth ambient temperature threshold is 0°C.

[0117] In the low-temperature dehumidification mode of the crew cabin, one specific implementation of step S202 is as follows:

[0118] Step S2028: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is activated, while the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are closed. This allows the refrigerant circuit to cool the passenger compartment through the evaporator and heat the passenger compartment through the internal air cooler. The evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the low-temperature dehumidification mode of the passenger compartment. At the same time, the first channel of the second three-way water valve is activated, so that the auxiliary heating circuit can provide auxiliary heating to the passenger compartment.

[0119] In this embodiment, with Figure 5eFor example, Figure 5e This is a schematic diagram of the vehicle thermal management system embodiment provided in this application under low-temperature dehumidification mode in the passenger compartment. Referring to this schematic diagram, step S2028 is specifically implemented as follows: the second shut-off valve 307 and the fourth shut-off valve 309 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the third shut-off valve 308, the fifth shut-off valve 310, and the sixth shut-off valve 311 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are closed, while the evaporator inlet electronic expansion valve 313 is open, so that the refrigerant circuit 102 heats the passenger compartment through the internal air cooler 302 and cools the passenger compartment through the evaporator 315. Specifically, the opening degree of the evaporator inlet electronic expansion valve 313 can be 10%.

[0120] Due to the low ambient temperature, the internal air cooler 302 may be insufficient. Therefore, the first channel of the second three-way water valve 243 on the auxiliary heating circuit 203 is opened, and the heat generated by the high-pressure liquid heater 213 is provided to the auxiliary heating circuit 203. The heat is then used to provide auxiliary heating to the crew cabin through the warm air heat exchanger 233, thereby achieving low-temperature dehumidification of the crew cabin.

[0121] In this embodiment, when a dehumidification control request is received from the air conditioning system, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than or equal to the fifth ambient temperature threshold and less than the fourth ambient temperature threshold, the temperature control mode is determined to be the passenger compartment low-temperature dehumidification mode. The evaporator is controlled to cool the passenger compartment, and the internal air cooler and auxiliary heating circuit are controlled to heat the passenger compartment. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0122] In the above Figure 2 Based on the illustrated embodiment, when a first temperature control request is obtained from the battery thermal management system and a second temperature control request is obtained from the air conditioning system, a specific implementation of step S201 is as follows:

[0123] Step S2013: Based on the temperature control request, obtain the ambient temperature of the vehicle thermal management system, the vehicle speed of the vehicle to which the vehicle thermal management system belongs, and the status information of the air conditioning system; based on the ambient temperature of the vehicle thermal management system, the vehicle speed of the vehicle to which the vehicle thermal management system belongs, and the status information of the air conditioning system, determine the temperature control mode that matches the battery and passenger compartment in the vehicle thermal management system.

[0124] When temperature control requests from both the battery thermal management system and the air conditioning system are received simultaneously, the ambient temperature of the vehicle thermal management system, the vehicle speed of the vehicle to which the vehicle thermal management system belongs, and the status information of the air conditioning system can be obtained. Based on the ambient temperature, vehicle speed, and status information of the air conditioning system, the matching temperature control mode can be determined.

[0125] More specifically, when both the first temperature control request and the second temperature control request are cooling requests, and the ambient temperature is greater than a first ambient temperature threshold, the temperature control mode is determined to be a first hybrid temperature control mode. For example, the first ambient temperature threshold is 30°C.

[0126] In the first hybrid temperature control mode, cooling is provided for both the battery and the passenger compartment simultaneously. One specific implementation of step S202 is as follows:

[0127] Step S2029: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve are all activated, so that the refrigerant circuit cools the passenger compartment and cools the battery cooling circuit through the battery cooler. The opening of the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve is adjusted according to the opening degree corresponding to the first mixed temperature control mode.

[0128] In this embodiment, with Figure 6a For example, Figure 6a This is a schematic diagram of the vehicle thermal management system embodiment in the first mixed temperature control mode provided in this application. Referring to this schematic diagram, step S2029 is specifically implemented as follows: the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The battery cooler inlet electronic expansion valve 312, the evaporator inlet electronic expansion valve 313, and the external air cooler outlet electronic expansion valve 314 are all open, allowing the refrigerant circuit 102 to cool the passenger compartment through the evaporator 315 and the battery cooling circuit 202 through the battery cooler 104, thereby achieving cooling of the battery 222. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 10%, the opening degree of the evaporator inlet electronic expansion valve 313 can be 20%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 100%.

[0129] In this embodiment, when cooling requests from both the battery thermal management system and the air conditioning system are simultaneously received, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than a first ambient temperature threshold, the temperature control mode is determined to be a first hybrid temperature control mode. The refrigerant circuit is controlled to cool the passenger compartment through the evaporator and to cool the battery cooling circuit through the battery cooler. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0130] More specifically, when the first temperature control request is a cooling request, the second temperature control request is a heating request, and the ambient temperature is lower than a second ambient temperature threshold, the temperature control mode is determined to be a second hybrid temperature control mode. For example, the second ambient temperature threshold is 0°C.

[0131] In the second hybrid temperature control mode, while cooling the battery, heating the occupant compartment is also provided. One specific implementation of step S202 is as follows:

[0132] Step S2030: The second, third, fourth, and sixth shut-off valves on the refrigerant circuit are activated, the first and fifth shut-off valves are closed, the evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit heats the passenger compartment through the internal air cooler and cools the battery cooling circuit through the battery cooler; the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the second mixed temperature control mode.

[0133] In this embodiment, with Figure 6b For example, Figure 6b This is a schematic diagram of the vehicle thermal management system embodiment in the second hybrid temperature control mode provided in this application. Referring to this schematic diagram, step S2030 is specifically implemented as follows: the second shut-off valve 307, the third shut-off valve 308, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the first shut-off valve 306 and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode. The evaporator inlet electronic expansion valve 313 is closed, while the battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are open, allowing the refrigerant circuit 102 to heat the passenger compartment through the internal air cooler 302 and cool the battery cooling circuit 202 through the battery cooler 104, thereby achieving cooling of the battery 222. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 10%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 10%.

[0134] In this embodiment, when the cooling request from the battery thermal management system and the heating request from the air conditioning system are obtained, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is less than the second ambient temperature threshold, the temperature control mode is determined to be the second hybrid temperature control mode. The refrigerant circuit is controlled to heat the passenger compartment through the internal air cooler and to cool the battery cooling circuit through the battery cooler. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0135] More specifically, when the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than a third ambient temperature threshold, the temperature control mode is determined to be a third hybrid temperature control mode. For example, the third ambient temperature threshold is 25°C.

[0136] In the third hybrid temperature control mode, while cooling the battery, the passenger compartment is dehumidified at high temperature. One specific implementation of step S202 is as follows:

[0137] Step S2031: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve are all activated, so that the refrigerant circuit cools the passenger compartment through the evaporator and the battery cooling circuit through the battery cooler. The opening of the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve is adjusted according to the opening degree corresponding to the third mixed temperature control mode. The first channel of the second three-way water valve is activated, so that the auxiliary heating circuit heats the passenger compartment.

[0138] In this embodiment, with Figure 6c For example, Figure 6cThis is a schematic diagram of the vehicle thermal management system embodiment provided in the third hybrid temperature control mode according to this application. Referring to this schematic diagram, step S2031 is specifically implemented as follows: the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The battery cooler inlet electronic expansion valve 312, the evaporator inlet electronic expansion valve 313, and the external air cooler outlet electronic expansion valve 314 are all open, so that the refrigerant circuit 102 cools the passenger compartment through the evaporator 315 and cools the battery cooling circuit through the battery cooler. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 10%, the opening degree of the evaporator inlet electronic expansion valve 313 can be 20%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 100%.

[0139] The first channel of the second three-way water valve 243 on the auxiliary heating circuit 203 is opened, allowing the auxiliary heating circuit 203 to use the heat generated by the high-pressure liquid heater 213 to heat the passenger compartment through the warm air heat exchanger 233. The refrigerant circuit 102 cools the passenger compartment, and the auxiliary heating circuit 203 heats the passenger compartment, achieving high-temperature dehumidification of the passenger compartment.

[0140] In this embodiment, when the cooling request from the battery thermal management system and the dehumidification request from the air conditioning system are obtained, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than the third ambient temperature threshold, the temperature control mode is determined to be the third hybrid temperature control mode. The refrigerant circuit is controlled to cool the passenger compartment and the battery, and the auxiliary heating circuit is controlled to heat the passenger compartment. This enables the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0141] More specifically, when the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to a fourth ambient temperature threshold and less than a third ambient temperature threshold, the temperature control mode is determined to be a fourth hybrid temperature control mode. For example, the third ambient temperature threshold is 25°C, and the fourth ambient temperature threshold is 5°C.

[0142] In the fourth hybrid temperature control mode, while cooling the battery, the passenger compartment is dehumidified at a medium temperature. One specific implementation of step S202 is as follows:

[0143] Step S2032: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The external air cooler outlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve are activated. This allows the refrigerant circuit to cool the passenger compartment through the evaporator, cool the battery cooling circuit through the battery cooler, and heat the passenger compartment through the internal air cooler. The opening of the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the fourth mixed temperature control mode.

[0144] In this embodiment, with Figure 6d For example, Figure 6d This is a schematic diagram of the vehicle thermal management system embodiment provided in the fourth mixed temperature control mode according to this application. Referring to this schematic diagram, step S2032 is specifically implemented as follows: the second shut-off valve 307 and the fourth shut-off valve 309 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the third shut-off valve 308, the fifth shut-off valve 310, and the sixth shut-off valve 311 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The external air cooler outlet electronic expansion valve 314 is closed, while the battery cooler inlet electronic expansion valve 312 and the evaporator inlet electronic expansion valve 313 are open, allowing the refrigerant circuit 102 to heat the passenger compartment through the internal air cooler 302 and cool the passenger compartment through the evaporator 315, thereby achieving medium-temperature dehumidification of the passenger compartment. Simultaneously, the refrigerant circuit 102 also cools the battery cooling circuit through the battery cooler. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 20%, and the opening degree of the evaporator inlet electronic expansion valve 313 can be 20%.

[0145] In this embodiment, when the cooling request from the battery thermal management system and the dehumidification control request from the air conditioning system are obtained, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than or equal to the fourth ambient temperature threshold and less than the third ambient temperature threshold, the temperature control mode is determined to be the fourth mixed temperature control mode. The refrigerant circuit is controlled to cool the passenger compartment through the evaporator, heat the passenger compartment through the internal air cooler, and cool the battery through the battery cooler. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0146] More specifically, when the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fifth ambient temperature threshold and less than the fourth ambient temperature threshold, the temperature control mode is determined to be the fifth hybrid temperature control mode. For example, the fourth ambient temperature threshold is 5°C, and the fifth ambient temperature threshold is 0°C.

[0147] In the fifth hybrid temperature control mode, while cooling the battery, the passenger compartment is dehumidified at a low temperature. One specific implementation of step S202 is as follows:

[0148] Step S2033: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The electronic expansion valves at the battery cooler inlet and evaporator inlet are activated, and the electronic expansion valve at the external air cooler outlet is closed. This allows the refrigerant circuit to cool the passenger compartment through the evaporator, cool the battery cooling circuit through the battery cooler, and heat the passenger compartment through the internal air cooler. The electronic expansion valves at the battery cooler inlet and evaporator inlet are adjusted according to the opening degree corresponding to the fifth mixed temperature control mode. The first channel of the second three-way water valve is activated, allowing the auxiliary heating circuit to provide auxiliary heating to the passenger compartment.

[0149] In this embodiment, with Figure 6e For example, Figure 6e This is a schematic diagram of the vehicle thermal management system embodiment provided in the fifth mixed temperature control mode according to this application. Referring to this schematic diagram, step S2033 is specifically implemented as follows: the second shut-off valve 307 and the fourth shut-off valve 309 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the third shut-off valve 308, the fifth shut-off valve 310, and the sixth shut-off valve 311 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The external air cooler outlet electronic expansion valve 314 is closed, while the battery cooler inlet electronic expansion valve 312 and the evaporator inlet electronic expansion valve 313 are open, so that the refrigerant circuit 102 heats the passenger compartment through the internal air cooler 302, cools the passenger compartment through the evaporator 315, and cools the battery cooling circuit through the battery cooler 104. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 10%, and the opening degree of the evaporator inlet electronic expansion valve 313 can be 10%.

[0150] The first channel of the second three-way water valve 243 on the auxiliary heating circuit 203 is opened, providing the heat generated by the high-pressure liquid heater 213 to the auxiliary heating circuit 203, which then heats the passenger compartment through the warm air heat exchanger 233. The evaporator 315 cools the passenger compartment, and the internal air cooler 302 and the auxiliary heating circuit 203 work together to heat the passenger compartment, achieving low-temperature dehumidification of the passenger compartment.

[0151] In this embodiment, when the cooling request from the battery thermal management system and the dehumidification control request from the air conditioning system are obtained, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is greater than or equal to the fifth ambient temperature threshold and less than the fourth ambient temperature threshold, the temperature control mode is determined to be the fifth mixed temperature control mode. The refrigerant circuit is controlled to cool the passenger compartment and the battery, and the internal air cooler and auxiliary heating circuit are controlled to heat the passenger compartment. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0152] More specifically, when the first temperature control request is a cooling request, the second temperature control request is a heating request, the vehicle speed is less than a speed threshold, the heating duration of the air conditioning system is greater than a heating duration threshold, and the refrigerant temperature in the external air cooler is less than a refrigerant temperature threshold, the temperature control mode is determined to be the sixth hybrid temperature control mode. For example, the speed threshold is 0.6 km / h, the heating duration threshold is 1 hour, and the refrigerant temperature threshold is 7°C.

[0153] In the sixth hybrid temperature control mode, while cooling the battery, heat pump de-icing is also performed. One specific implementation of step S202 is as follows:

[0154] Step S2034: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit cools the battery cooling circuit through the battery cooler. The opening degree of the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the sixth mixed temperature control mode.

[0155] In this embodiment, with Figure 6f For example, Figure 6fThis is a schematic diagram of the vehicle thermal management system embodiment provided in the sixth mixed temperature control mode according to this application. Referring to this schematic diagram, step S2034 is specifically implemented as follows: the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 on the refrigerant circuit 102 are open, while the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 are closed, and the refrigerant circuit 102 is in cooling mode at this time. The evaporator inlet electronic expansion valve 313 is closed, while the battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are open, allowing the refrigerant circuit 102 to cool the battery cooler 104, thereby cooling the battery 222 and using the heat from the battery circuit to heat the compressor suction. The high-temperature refrigerant in the external air cooler 301 dissipates heat, de-icing the external air cooler 301. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 20%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 100%.

[0156] In this embodiment, when the cooling request from the battery thermal management system and the heating request from the air conditioning system are obtained, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the vehicle speed is less than the speed threshold, the heating duration of the air conditioning system is greater than the heating duration threshold, and the refrigerant temperature in the external air cooler is less than the refrigerant temperature threshold, the temperature control mode is determined to be the sixth hybrid temperature control mode. This mode controls the refrigerant circuit to cool the battery while de-icing the external air cooler, enabling the vehicle thermal management system to operate in a mode suitable for the current ambient temperature. This effectively improves the temperature control effect and ensures the normal operation of the thermal management system.

[0157] More specifically, when both the first temperature control request and the second temperature control request are heating requests, and the ambient temperature is lower than the second ambient temperature threshold, the temperature control mode is determined to be the seventh hybrid temperature control mode. For example, the second ambient temperature threshold is 0°C.

[0158] In the seventh hybrid temperature control mode, heating is provided for both the battery and the passenger compartment simultaneously. One specific implementation of step S202 is as follows:

[0159] Step S2035: The second, third, and fifth shut-off valves on the refrigerant circuit are activated, while the first, fourth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit heats the passenger compartment through the internal air cooler and heats the battery cooling circuit through the battery cooler. The battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the seventh mixed temperature control mode.

[0160] In this embodiment, with Figure 6g For example, Figure 6g This is a schematic diagram of the vehicle thermal management system embodiment provided in the seventh mixed temperature control mode according to this application. Referring to this schematic diagram, step S2035 is specifically implemented as follows: the second shut-off valve 307, the third shut-off valve 308, and the fifth shut-off valve 310 on the refrigerant circuit 102 are open, while the first shut-off valve 306, the fourth shut-off valve 309, and the sixth shut-off valve 311 are closed. The refrigerant circuit 102 is in heating mode at this time. The evaporator inlet electronic expansion valve 313 is closed, while the battery cooler inlet electronic expansion valve 312 and the external air cooler outlet electronic expansion valve 314 are open. This allows the refrigerant circuit 102 to heat the passenger compartment through the internal air cooler 302 and to heat the battery cooling circuit 202 through the battery cooler 104, thereby achieving heating of the battery 222. Specifically, the opening degree of the battery cooler inlet electronic expansion valve 312 can be 100%, and the opening degree of the external air cooler outlet electronic expansion valve 314 can be 10%.

[0161] In this embodiment, when heating requests from both the battery thermal management system and the air conditioning system are simultaneously received, a matching temperature control mode is determined based on the ambient temperature of the vehicle thermal management system. When the ambient temperature is less than the second ambient temperature threshold, the temperature control mode is determined to be the seventh hybrid temperature control mode. The refrigerant circuit is controlled to heat the passenger compartment through the internal air cooler and to heat the battery cooling circuit through the battery cooler. This allows the vehicle thermal management system to operate in a mode suitable for the current ambient temperature, effectively improving the temperature control effect and ensuring the normal operation of the thermal management system.

[0162] Figure 7 This is a schematic diagram of an electronic control unit provided in this application. Figure 7 As shown, the electronic control unit 70 includes: a processor 71, a memory 72, and a communication interface 73; wherein, the memory 72 is used to store executable instructions of the processor 71; the processor 71 is configured to execute the technical solutions in any of the foregoing method embodiments by executing the executable instructions.

[0163] Optionally, the memory 72 can be either standalone or integrated with the processor 71.

[0164] Optionally, when the memory 72 is a device independent of the processor 71, the electronic device 70 may further include a bus 74 for connecting the aforementioned devices.

[0165] The electronic device is used to execute the technical solutions in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be repeated here.

[0166] This embodiment also provides a new energy vehicle, which includes, as shown in the example below. Figure 7The electronic control unit and vehicle thermal management system shown are not described in detail here.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A temperature control method based on an automotive thermal management system, characterized in that, The vehicle thermal management system includes: a coolant circuit and a refrigerant circuit; wherein, the method includes: Obtain a temperature control request, and based on the temperature control request, as well as the environmental information and current status information of the vehicle thermal management system, determine the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system. In the matched temperature control mode, the coolant circuit is controlled to use the waste heat from the electric drive or the auxiliary heating circuit for heating; and / or the refrigerant circuit is controlled to perform cooling and / or heating. When the temperature control request is obtained from the battery thermal management system, and the temperature control request is a cooling control request, then in the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or the auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: In the matched battery cooling mode, the first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit cools the battery cooling circuit through the battery cooler. The opening degree of the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the battery cooling mode.

2. The temperature control method based on an automotive thermal management system according to claim 1, characterized in that, When the temperature control request is obtained from the battery thermal management system, and the temperature control request is a heating control request, determining the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system based on the temperature control request, the environmental information and current status information of the vehicle thermal management system includes: Based on the temperature control request, the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system is obtained; The temperature control mode for matching the battery in the vehicle thermal management system is determined based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system.

3. The temperature control method based on an automotive thermal management system according to claim 2, characterized in that, The step of determining the battery-matched temperature control mode in the vehicle thermal management system based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system includes: When the coolant temperature is lower than the coolant temperature threshold, the temperature control mode is determined to be the first battery heating mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second, third, and fifth shut-off valves on the refrigerant circuit are activated, while the first, fourth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit heats the battery cooling circuit through the battery cooler. The battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the first battery heating mode.

4. The temperature control method based on an automotive thermal management system according to claim 2, characterized in that, The step of determining the battery-matched temperature control mode in the vehicle thermal management system based on the coolant temperature of the electric drive cooling circuit in the vehicle thermal management system includes: When the coolant temperature is greater than or equal to the coolant temperature threshold, the temperature control mode is determined to be the second battery heating mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The first and second channels of the four-way valve on the coolant circuit are activated, and the second channel of the first three-way water valve is activated. The waste heat generated by the electric drive module in the coolant circuit is used to heat the coolant, so that the heated coolant can heat the battery in the battery cooling circuit.

5. The temperature control method based on an automotive thermal management system according to claim 1, characterized in that, When the temperature control request is obtained from the air conditioning system, determining the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system based on the temperature control request, the environmental information and current status information of the vehicle thermal management system includes: Based on the temperature control request, the ambient temperature of the vehicle thermal management system is obtained; Based on the ambient temperature of the vehicle thermal management system, the temperature control mode matching the passenger compartment in the vehicle thermal management system is determined.

6. The temperature control method based on an automotive thermal management system according to claim 5, characterized in that, The step of determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: When the temperature control request is a cooling request and the ambient temperature is greater than the first ambient temperature threshold, the temperature control mode is determined to be the occupant cabin cooling mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, while the battery cooler inlet electronic expansion valve is closed, so that the refrigerant circuit cools the passenger compartment. The opening degree of the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the refrigeration mode of the passenger compartment.

7. The temperature control method based on an automotive thermal management system according to claim 5, characterized in that, The step of determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: When the temperature control request is a heating request and the ambient temperature is less than the second ambient temperature threshold, the temperature control mode is determined to be the crew cabin heating mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second, third, and fifth shut-off valves on the refrigerant circuit are activated, while the first, fourth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, while the battery cooler inlet electronic expansion valve is closed, so that the refrigerant circuit can heat the passenger compartment. The opening degree of the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the heating mode of the passenger compartment.

8. The temperature control method based on an automotive thermal management system according to claim 5, characterized in that, The step of determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: When the temperature control request is a dehumidification request and the ambient temperature is greater than the third ambient temperature threshold, the temperature control mode is determined to be the passenger cabin high temperature dehumidification mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, while the battery cooler inlet electronic expansion valve is closed, so that the refrigerant circuit can cool the passenger compartment. The opening degree of the evaporator inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the high-temperature dehumidification mode of the passenger compartment. The first channel of the second three-way water valve is activated, enabling the auxiliary heating circuit to heat the crew compartment.

9. The temperature control method based on an automotive thermal management system according to claim 5, characterized in that, The step of determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: When the temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fourth ambient temperature threshold and less than the third ambient temperature threshold, the temperature control mode is determined to be the passenger cabin temperature dehumidification mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is activated, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are closed. This allows the refrigerant circuit to cool the passenger compartment through the evaporator and heat the passenger compartment through the internal air cooler. The opening of the evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the temperature dehumidification mode in the passenger compartment.

10. The temperature control method based on an automotive thermal management system according to claim 5, characterized in that, The step of determining the temperature control mode matching the passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system includes: When the temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fifth ambient temperature threshold and less than the fourth ambient temperature threshold, the temperature control mode is determined to be the crew cabin low-temperature dehumidification mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is activated, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are closed. This allows the refrigerant circuit to cool the passenger compartment through the evaporator and heat the passenger compartment through the internal air cooler. The opening of the evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the low-temperature dehumidification mode of the passenger compartment. The first channel of the second three-way water valve is activated, enabling the auxiliary heating circuit to provide auxiliary heating to the crew compartment.

11. The temperature control method based on an automotive thermal management system according to claim 1, characterized in that, When the temperature control request is obtained from the battery thermal management system (first temperature control request) and the air conditioning system (second temperature control request), determining the temperature control mode matching the battery and / or passenger compartment in the vehicle thermal management system based on the temperature control request, the environmental information and current status information of the vehicle thermal management system includes: Based on the temperature control request, the ambient temperature of the vehicle thermal management system, the vehicle speed of the vehicle to which the vehicle thermal management system belongs, and the status information of the air conditioning system are obtained. Based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system, the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system is determined.

12. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When both the first temperature control request and the second temperature control request are cooling requests, and the ambient temperature is greater than the first ambient temperature threshold, the temperature control mode is determined to be the first hybrid temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve are all activated, so that the refrigerant circuit cools the passenger compartment and cools the battery cooling circuit through the battery cooler. The opening of the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve is adjusted according to the opening degree corresponding to the first mixed temperature control mode.

13. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When the first temperature control request is a cooling request, the second temperature control request is a heating request, and the ambient temperature is less than the second ambient temperature threshold, the temperature control mode is determined to be the second hybrid temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second, third, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the first and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated. This allows the refrigerant circuit to heat the passenger compartment through the internal air cooler and cool the battery cooling circuit through the battery cooler. The battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are adjusted according to the opening degree corresponding to the second mixed temperature control mode.

14. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than the third ambient temperature threshold, the temperature control mode is determined to be the third hybrid temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve are all activated, allowing the refrigerant circuit to cool the passenger compartment via the evaporator and the battery cooling circuit via the battery cooler. The opening degrees of the evaporator inlet electronic expansion valve, the battery cooler inlet electronic expansion valve, and the external air cooler outlet electronic expansion valve are adjusted according to the corresponding opening degree of the third mixed temperature control mode. The first channel of the second three-way water valve is activated, enabling the auxiliary heating circuit to heat the crew compartment.

15. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fourth ambient temperature threshold and less than the third ambient temperature threshold, the temperature control mode is determined to be the fourth hybrid temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The external air cooler outlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve are activated. This allows the refrigerant circuit to cool the passenger compartment through the evaporator, cool the battery cooling circuit through the battery cooler, and heat the passenger compartment through the internal air cooler. The opening of the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the fourth mixed temperature control mode.

16. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When the first temperature control request is a cooling request, the second temperature control request is a dehumidification request, and the ambient temperature is greater than or equal to the fifth ambient temperature threshold and less than the fourth ambient temperature threshold, the temperature control mode is determined to be the fifth mixed temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second and fourth shut-off valves on the refrigerant circuit are activated, while the first, third, fifth, and sixth shut-off valves are closed. The battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve are activated, and the external air cooler outlet electronic expansion valve is closed. This allows the refrigerant circuit to cool the passenger compartment through the evaporator, cool the battery cooling circuit through the battery cooler, and heat the passenger compartment through the internal air cooler. The opening of the battery cooler inlet electronic expansion valve and the evaporator inlet electronic expansion valve is adjusted according to the opening degree corresponding to the fifth mixed temperature control mode. The first channel of the second three-way water valve is activated, enabling the auxiliary heating circuit to provide auxiliary heating to the crew compartment.

17. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When the first temperature control request is a cooling request, the second temperature control request is a heating request, the vehicle speed is less than a speed threshold, the heating duration of the air conditioning system is greater than a heating duration threshold, and the refrigerant temperature in the external air cooler is less than a refrigerant temperature threshold, the temperature control mode is determined to be the sixth hybrid temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The first, fourth, and sixth shut-off valves on the refrigerant circuit are activated, while the second, third, and fifth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated, so that the refrigerant circuit cools the battery cooling circuit through the battery cooler. The opening degree of the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the sixth mixed temperature control mode.

18. The temperature control method based on an automotive thermal management system according to claim 11, characterized in that, The step of determining the temperature control mode matching the battery and passenger compartment in the vehicle thermal management system based on the ambient temperature of the vehicle thermal management system, the vehicle speed to which the vehicle thermal management system belongs, and the status information of the air conditioning system includes: When both the first temperature control request and the second temperature control request are heating requests, and the ambient temperature is less than the second ambient temperature threshold, the temperature control mode is determined to be the seventh hybrid temperature control mode. In the matched temperature control mode, controlling the coolant circuit to utilize waste heat from the electric drive or an auxiliary heating circuit for heating; and / or controlling the refrigerant circuit for cooling and / or heating includes: The second, third, and fifth shut-off valves on the refrigerant circuit are activated, while the first, fourth, and sixth shut-off valves are closed. The evaporator inlet electronic expansion valve is closed, and the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve are activated. This allows the refrigerant circuit to heat the passenger compartment through the internal air cooler and the battery cooling circuit through the battery cooler. The opening of the battery cooler inlet electronic expansion valve and the external air cooler outlet electronic expansion valve is adjusted according to the opening degree corresponding to the seventh mixed temperature control mode.

19. An electronic control unit, characterized in that, include: Processor, memory, communication interface; The memory is used to store the executable instructions of the processor; The processor is configured to execute the temperature control method based on the vehicle thermal management system as described in any one of claims 1 to 18 by executing the executable instructions.

20. A new energy vehicle, characterized in that, include: The electronic control unit and the vehicle thermal management system as described in claim 19.

Images