Thermal management system control method, system, storage medium, and vehicle

Abstract

The application discloses a kind of thermal management system control method, system, storage medium and vehicle.Therein, the method comprises: obtaining the current state parameter and working mode of thermal management system;According to the current state parameter and the working mode, determine the thermal management system control instruction, wherein the thermal management system control instruction is used to control the working state of at least one of water pump, fan, PTC heater, proportional valve, compressor and expansion valve.The present application solves the technical problem that the control strategy of thermal management system is not perfect.

Description

Technical Field

[0001] This invention relates to the field of new energy and thermal energy management technology, and more specifically, to a thermal management system control method, system, storage medium, and vehicle. Background Technology

[0002] With the increasing popularity of new energy vehicles, especially electric vehicles, thermal management systems (TMS) have become a key component in ensuring vehicle performance, safety, and extending battery life. However, the control strategies of thermal management systems in related technologies are not perfect enough, thus failing to meet the temperature regulation requirements under specific operating modes, which in turn reduces vehicle safety and user experience during driving.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a thermal management system control method, system, storage medium, and vehicle to at least address the technical problem of insufficient control strategies in thermal management systems.

[0005] According to one aspect of the present invention, a thermal management system control method is provided, comprising: acquiring current state parameters and operating mode of the thermal management system; and determining a thermal management system control command based on the current state parameters and operating mode, wherein the thermal management system control command is used to control the operating state of at least one of a water pump, a fan, a PTC heater, a proportional valve, a compressor, and an expansion valve.

[0006] Optionally, based on the current state parameters and operating mode, the control commands for the thermal management system include: responding to a cooling operating mode, determining the flow demand of the water-cooled chiller based on the compressor discharge pressure and determining a first speed command for the chiller water pump based on the flow demand; responding to a cooling operating mode, determining the chiller flow demand based on the opening degree of the three-way valve towards the battery and the chiller outlet water temperature and determining a second speed command for the chiller water pump based on the chiller flow demand; responding to a heating operating mode, determining the chiller flow... The system calculates the flow rate demand and determines the third speed command for the chiller water pump based on the chiller's flow rate demand; it also determines the electric drive circuit flow rate demand based on the flow rate demand of each component in the electric drive cycle at extreme temperatures and determines the fourth speed command for the electric drive circuit water pump based on the electric drive circuit flow rate demand; and it determines the water pump control command based on the first, second, third, and fourth speed commands. The compressor discharge pressure, the opening degree of the three-way valve towards the battery, the chiller outlet water temperature, the compressor suction pressure, the electric drive system inlet water temperature, and the flow rate demand of each component in the electric drive cycle at extreme temperatures are included in the current state parameters.

[0007] Optionally, the control commands for the thermal management system are determined based on the current state parameters and operating mode, including: determining the fan speed command based on the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, the operating mode of the multi-way valve, and the electric drive system inlet water temperature, wherein the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, and the electric drive system inlet water temperature are included in the current state parameters.

[0008] Optionally, determining the thermal management system control command based on the current state parameters and operating mode includes: determining the multi-way valve control command and outputting the multi-way valve control command as the thermal management system control command based on the current state and demand mode of the multi-way valve; or, determining the multi-way valve control command and outputting the multi-way valve control command as the thermal management system control command based on the target inlet water temperature of the battery, wherein the current state of the multi-way valve and the target inlet water temperature of the battery are included in the current state parameters.

[0009] Optionally, the control command for the thermal management system is determined based on the current state parameters and the operating mode, including: in response to the current state parameters meeting the preset compressor start-up conditions, determining the compressor speed command based on the operating mode, the target inlet water temperature of the chiller, and the target outlet water temperature of the PTC, and outputting the compressor speed command as the control command for the thermal management system, wherein the target inlet water temperature of the chiller and the target outlet water temperature of the PTC are included in the current state parameters.

[0010] Optionally, determining the thermal management system control command based on the current status parameters and operating mode includes: determining the expansion valve control command based on the operating mode and compressor operating status, and outputting the expansion valve control command as the thermal management system control command, wherein the compressor operating status is included in the current status parameters.

[0011] According to another aspect of the present invention, a thermal management system control system is also provided, comprising: an acquisition module for acquiring current state parameters and operating mode of the thermal management system; and a determination module for determining a thermal management system control command based on the current state parameters and operating mode, wherein the thermal management system control command is used to control the operating state of at least one of a water pump, a fan, a PTC heater, a proportional valve, a compressor, and an expansion valve.

[0012] Optionally, the determining module is further configured to: in response to the operating mode being cooling mode, determine the flow requirement of the water-cooled chiller based on the compressor discharge pressure and determine a first speed command for the chiller water pump based on the flow requirement of the water-cooled chiller; in response to the operating mode being cooling mode, determine the flow requirement of the chiller based on the opening degree of the three-way valve towards the battery and the chiller outlet water temperature and determine a second speed command for the chiller water pump based on the flow requirement of the chiller; in response to the operating mode being heating mode, determine the flow requirement of the chiller based on the compressor suction pressure and the inlet water temperature of the electric drive system and determine a second speed command for the chiller water pump based on the flow requirement of the chiller. The flow rate requirement determines the third speed command for the chiller water pump; based on the flow rate requirement of each component in the electric drive cycle at the extreme temperature, the flow rate requirement of the electric drive circuit is determined, and the fourth speed command for the electric drive circuit water pump is determined based on the flow rate requirement of the electric drive circuit; based on the first speed command, the second speed command, the third speed command, and the fourth speed command, the water pump control command is determined; wherein, the compressor discharge pressure, the opening degree of the three-way valve towards the battery, the chiller outlet water temperature, the compressor suction pressure, the electric drive system inlet water temperature, and the flow rate requirement of each component in the electric drive cycle at the extreme temperature are included in the current state parameters.

[0013] Optionally, the determining module is also used to: determine the fan speed command based on the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, the multi-way valve operating mode and the electric drive system inlet water temperature, wherein the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, and the electric drive system inlet water temperature are included in the current status parameters.

[0014] Optionally, the determining module is further configured to: determine the multi-way valve control command and output the multi-way valve control command as a thermal management system control command based on the current state of the multi-way valve and the multi-way valve demand mode; or, determine the multi-way valve control command and output the multi-way valve control command as a thermal management system control command based on the target water inlet temperature of the battery, wherein the current state of the multi-way valve and the target water inlet temperature of the battery are included in the current state parameter.

[0015] Optionally, the determining module is further configured to: in response to the current state parameters satisfying the preset compressor start-up conditions, determine the compressor speed command based on the working mode, the target inlet water temperature of the chiller, and the target outlet water temperature of the PTC, and output the compressor speed command as a control command for the thermal management system, wherein the target inlet water temperature of the chiller and the target outlet water temperature of the PTC are included in the current state parameters.

[0016] Optionally, the determining module is also used to: determine the expansion valve control command based on the working mode and the compressor operating status, and output the expansion valve control command as the thermal management system control command, wherein the compressor operating status is included in the current status parameters.

[0017] According to another aspect of the present invention, a vehicle is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the thermal management system control method of the present invention during runtime.

[0018] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the storage medium is located to execute the thermal management system control method of the present invention.

[0019] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the thermal management system control method of the present invention.

[0020] In this embodiment of the invention, by acquiring the current state parameters and operating mode of the thermal management system, the efficiency and demand of the heat exchange process inside the vehicle can be monitored and analyzed in real time, ensuring that the thermal management system can flexibly adjust according to actual operating conditions. Based on the current state parameters and operating mode, control commands for the thermal management system are determined, enabling precise control of the operating status of key components such as water pumps, fans, PTC heaters, proportional valves, compressors, and expansion valves. Based on the above technical process, this embodiment of the invention achieves the goal of optimizing the control strategy of the thermal management system, thereby improving the working efficiency of the thermal management system and the energy utilization efficiency of the vehicle, and thus solving the technical problem of insufficient thermal management system control strategy. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a flowchart of a thermal management system control method according to one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a thermal management system control system according to one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 1 according to one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 2 according to one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 3 according to one embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 3-1 according to one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 4 according to one embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 4-1 according to one embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 5 according to one embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 5-1 according to one embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 7 according to one embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 8 according to one embodiment of the present invention;

[0034] Figure 13 This is a structural block diagram of a thermal management system control system according to one embodiment of the present invention. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention 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.

[0037] According to an embodiment of the present invention, a method embodiment of a thermal management system control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0038] This method embodiment can be executed in an electronic device or similar computing device that includes memory and a processor. Taking operation on a computer terminal as an example, the computer terminal may include one or more processors (processors may include, but are not limited to, central processing units (CPUs), graphics processing units (GPUs), digital signal processing (DSP) chips, microcontroller units (MCUs), field-programmable gate arrays (FPGAs), neural network processors (NPUs), tensor processors (TPUs), artificial intelligence (AI) type processors, etc.) and memory for storing data. Optionally, the computer terminal may also include transmission devices, input / output devices, and display devices for communication functions. Those skilled in the art will understand that the above structural description is merely illustrative and does not limit the structure of the computer terminal. For example, the computer terminal may include more or fewer components than described above, or have a different configuration than described above.

[0039] The memory can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the thermal management system control method in this embodiment. The processor executes various functional applications and data processing by running the computer program stored in the memory, thereby realizing the aforementioned thermal management system control method. The memory may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to a mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0040] The transmission device is used to receive or send data via a network. Specific examples of the network mentioned above may include a wireless network provided by the mobile terminal's communication provider. In one example, the transmission device includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0041] Display devices can be, for example, touchscreen liquid crystal displays (LCDs) and touch displays (also referred to as "touchscreens" or "touch displays"). The LCD allows users to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows users to interact with the GUI through finger contact and / or gestures on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0042] Figure 1 This is a flowchart of a thermal management system control method according to one embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0043] Step S11: Obtain the current status parameters and operating mode of the thermal management system;

[0044] The aforementioned thermal management system is an integrated vehicle thermal management system. This system integrates temperature control of multiple heat-sensitive components inside the vehicle (such as the battery, motor, and electronic drive system). By coordinating the working states of components such as water pumps, fans, PTC heaters, proportional valves, compressors, and expansion valves, it ensures that the temperature of each component is maintained within the ideal operating range under different environmental and operating conditions, thereby improving the overall performance and efficiency of the vehicle.

[0045] The aforementioned thermal management system operates in modes including, but not limited to, cooling and heating modes. Specifically, the setting and switching of operating modes within the thermal management system are determined based on the vehicle system's requirements and external environmental conditions. In cooling mode, the thermal management system removes heat from areas requiring cooling (such as the battery pack and motor) by controlling components like the compressor, expansion valve, and fan. This heat is then carried to heat exchangers (such as radiators) via refrigerant circulation, and finally dissipated to the external environment by the fan. This reduces the temperature of the battery, motor, and other electronic devices, preventing performance degradation or damage caused by overheating. In heating mode, the thermal management system utilizes PTC heaters, proportional valves, and water pumps to heat the vehicle interior, ensuring the battery and other critical components operate within suitable temperature ranges. This maintains normal vehicle operation and extends battery life.

[0046] By flexibly switching between cooling and heating modes, the thermal management system can effectively regulate the temperature of various components inside the vehicle, ensuring that the vehicle maintains good performance under different environmental and operating conditions. This, in turn, improves the vehicle's energy efficiency, extends component life, and enhances driving comfort.

[0047] For example, the current status parameters and operating modes of the thermal management system can be obtained through an onboard sensor network. Specifically, the onboard sensor network includes various temperature sensors, pressure sensors, position sensors, and status monitoring sensors to monitor the operating status of key components in the thermal management system in real time, such as the compressor's discharge and suction pressures, the outlet and inlet water temperatures of the chiller and PTC heater, the fan's operating status, and the opening degree of multi-way valves (such as three-way valves). Furthermore, the current operating mode of the thermal management system, such as cooling mode or heating mode, can be read through the vehicle's Electronic Control Unit (ECU).

[0048] Step S12: Determine the thermal management system control command based on the current status parameters and operating mode. The thermal management system control command is used to control the operating status of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve.

[0049] The aforementioned water pump is a water-cooled circulating pump, whose function is to circulate water or coolant in the thermal management system to achieve heat transfer and distribution.

[0050] The PTC heater mentioned above stands for Positive Temperature Coefficient heater, which is a heater made using PTC thermistor elements as heating materials. In thermal management systems, PTC heaters are mainly used to rapidly heat the coolant, thereby heating the battery pack or the air inside the vehicle.

[0051] The aforementioned proportional valve is a type of valve capable of continuously adjusting fluid flow rate or pressure based on an input signal. Compared to traditional on / off valves, proportional valves offer more precise flow or pressure control. In thermal management systems, proportional valves can be used to accurately control the direction and flow rate of coolant, thereby achieving temperature control for different components.

[0052] The compressor mentioned above is the core component in the refrigeration cycle. It can compress the refrigerant, increase its pressure and temperature, thereby promoting the circulation and heat exchange of the refrigerant in the thermal management system.

[0053] The aforementioned expansion valve (or throttle valve) is located before the evaporator. Its main function is to reduce the pressure and temperature of the refrigerant, causing the refrigerant to change from a liquid state to a gaseous state, releasing or absorbing heat.

[0054] Based on steps S11 to S12 above, by acquiring the current status parameters and operating mode of the thermal management system, the efficiency and demand of the heat exchange process inside the vehicle can be monitored and analyzed in real time, ensuring that the thermal management system can flexibly adjust according to actual operating conditions. Based on the current status parameters and operating mode, control commands for the thermal management system are determined, enabling precise control of the operating status of key components such as the water pump, fan, PTC heater, proportional valve, compressor, and expansion valve. Based on the above technical process, this embodiment of the invention achieves the goal of optimizing the control strategy of the thermal management system, thereby realizing the technical effect of improving the working efficiency of the thermal management system and the energy utilization efficiency of the vehicle, and thus solving the technical problem of insufficient thermal management system control strategy.

[0055] The thermal management system control method in the embodiments of this disclosure will be further described below.

[0056] Optionally, in step S12, the control commands for the thermal management system are determined based on the current state parameters and operating mode, including:

[0057] Step S1211: In response to the working mode being the refrigeration working mode, the flow requirement of the water-cooled chiller is determined based on the compressor discharge pressure, and the first speed command of the chiller water pump is determined based on the flow requirement of the water-cooled chiller.

[0058] The compressor discharge pressure mentioned above reflects the refrigerant pressure within the thermal management system and is one of the key parameters determining the cooling effect. Based on the compressor discharge pressure, the thermal management system can determine the required cooling water flow rate for the water-cooled chiller, thereby ensuring the normal operation of the compressor and the cooling effect. Specifically, in the thermal management system, the compressor is one of the key components of the refrigeration cycle, responsible for compressing the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, which is then sent to the condenser for cooling and pressure release. The compressor discharge pressure is the refrigerant gas pressure at the compressor outlet, and it is crucial for judging the operating status of the thermal management system.

[0059] For example, when the compressor discharge pressure is greater than a preset threshold, it indicates poor heat dissipation of the condenser or blockage in the thermal management system. When the compressor discharge pressure is less than or equal to the preset threshold, it indicates insufficient refrigerant quality or decreased compressor efficiency.

[0060] The aforementioned water-cooled chiller typically refers to refrigeration equipment that uses water as a cooling medium. In a thermal management system, the water-cooled chiller can be a refrigeration cycle system including a compressor, condenser, evaporator, and expansion valve. Cooling water is used to remove the heat generated by the compressor and condenser, thereby reducing the temperature and pressure of the refrigerant, enabling it to effectively absorb heat in the evaporator and achieve the refrigeration purpose.

[0061] The aforementioned chiller water pump is a key component in the water-cooled chiller system, responsible for driving the cooling water circulation. Its rotational speed affects the flow rate and pressure of the cooling water, which in turn affects the efficiency and stability of the entire refrigeration system.

[0062] The aforementioned first speed command is used to control the speed of the chiller water pump. Its goal is to regulate the flow rate of cooling water and ensure that the compressor operates under suitable temperature and pressure conditions, thereby maintaining efficient refrigeration performance.

[0063] For example, when the thermal management system is in cooling mode, the flow requirement of the water-cooled chiller can be determined based on the compressor discharge pressure using Table 1.

[0064] Table 1. Relationship between compressor discharge pressure and water-cooled chiller flow rate requirement

[0065]

[0066] Table 1 shows the relationship between compressor discharge pressure and water-cooled chiller flow requirement. In the table, P_CompOut is the compressor discharge pressure, bar is a commonly used unit of pressure, 1 bar equals 1 standard atmosphere, approximately equal to 100,000 Pascals (Pa), and WCC_FlowReq is the water-cooled chiller flow requirement under a specific compressor discharge pressure, with the unit being L / min, which is the volume of cooling water that the water-cooled chiller needs to pass through per minute.

[0067] Step S1212: In response to the working mode being the cooling working mode, the flow requirement of the chiller is determined based on the opening degree of the three-way valve towards the battery and the outlet water temperature of the chiller, and the second speed command of the chiller water pump is determined based on the flow requirement of the chiller.

[0068] The aforementioned three-way valve has three openings, allowing it to change the direction of fluid flow or distribute fluid to different paths. In thermal management systems, three-way valves are typically used to adjust the flow rate and direction of coolant according to the battery's temperature requirements, controlling the flow of coolant to the battery or other components requiring cooling. In cooling mode, the thermal management system can determine the required coolant flow rate for the battery by monitoring the opening degree of the three-way valve towards the battery and the outlet water temperature of the chiller, thereby adjusting the speed of the chiller's water pump and generating a second speed command.

[0069] The aforementioned refrigeration machine can achieve the effect of refrigeration or cooling by controlling the circulation (evaporation and condensation) of the refrigerant in the thermal management system to transfer heat energy.

[0070] For example, the above-mentioned chiller flow requirement can be expressed as:

[0071] Chiller_FlowReq=30L / min+E d

[0072] Where, Chiller_FlowReq is the chiller flow rate requirement, E d For current shunting, specifically, E d Calculations can be performed using a preset calibration table.

[0073] Step S1213: In response to the working mode being heating mode, the chiller flow requirement is determined based on the compressor suction pressure and the water inlet temperature of the electric drive system, and the third speed command of the chiller water pump is determined based on the chiller flow requirement.

[0074] In heating mode, the compressor absorbs heat from the external environment and transfers it to areas inside the vehicle, such as the battery or passenger compartment, that require heating. This process is typically achieved by reversing the operation of the air conditioning system, a process known as a "heat pump." The compressor suction pressure is the pressure at the compressor's suction port. Specifically, in heating mode, low-temperature, low-pressure refrigerant absorbs heat from the external environment in the evaporator (which acts as an external heat exchanger) and is then drawn into the compressor, where it is compressed into a high-temperature, high-pressure gas. If the compressor suction pressure is too low, it indicates insufficient refrigerant quality in the thermal management system or a decrease in the heat absorption capacity of the external heat exchanger. Conversely, if the compressor suction pressure is too high, it may be due to excessively high external ambient temperature or other reasons causing the refrigerant to absorb heat too quickly.

[0075] The aforementioned inlet water temperature of the electric drive system refers to the temperature of the coolant entering the electric drive system (such as the motor and power electronic controller). In heating mode, the electric drive system typically generates a significant amount of waste heat, which can be transferred to the passenger compartment or battery pack for heating via the thermal management system. If the inlet water temperature of the electric drive system is too low, it may indicate that the waste heat generated by the system is insufficient to meet heating requirements, necessitating an additional heat source such as a PTC heater to supplement the heat. Conversely, if the inlet water temperature is high, the coolant circulation speed can be reduced by adjusting the water pump speed, allowing more of the waste heat generated by the electric drive system to be used for heating, while avoiding energy waste due to over-cooling.

[0076] Therefore, in heating mode, the flow demand of the chiller (acting as a heat pump at this time) can be dynamically adjusted based on two key state parameters: compressor suction pressure and electric drive system inlet water temperature. This allows for precise control of the chiller water pump speed, ensuring that the thermal management system can efficiently transfer heat without excessively consuming energy or damaging other components within the system.

[0077] For example, the chiller flow rate requirement can be determined using Table 2 based on the compressor suction pressure and the water inlet temperature of the electric drive system.

[0078] Table 2 Relationship between compressor suction pressure, electric drive system inlet water temperature, and chiller flow rate requirements

[0079]

[0080] Table 2 shows the relationship between compressor suction pressure, electric drive system inlet water temperature, and chiller flow rate requirement. In this table, P_CompIn is the compressor suction pressure, TSat(P_CompIn) is the saturation temperature corresponding to P_CompIn, and Chiller_FlowReq is the chiller flow rate requirement.

[0081] Step S1214: Determine the flow requirement of the electric drive circuit based on the flow requirements of each component in the electric drive cycle at the extreme temperature, and determine the fourth speed command of the electric drive circuit water pump based on the flow requirement of the electric drive circuit.

[0082] For example, the flow requirement of the electric drive circuit can be determined using Table 3, based on the flow requirements of each component in the electric drive cycle at extreme temperatures.

[0083] Table 3 Electric Drive Circuit Flow Demand Table

[0084]

[0085] Table 3 shows the flow requirements for the electric drive circuit. The external DC-DC converter is responsible for converting the DC power from the high-voltage battery into low-voltage DC power for use by the vehicle's electronic equipment. Once the flow requirements for the electric drive circuit are determined, the fourth speed command for the electric drive circuit water pump can be determined accordingly.

[0086] Step S1215: Determine the water pump control command based on the first speed command, the second speed command, the third speed command, and the fourth speed command;

[0087] The current state parameters include the compressor discharge pressure, the opening degree of the three-way valve towards the battery, the chiller outlet water temperature, the compressor suction pressure, the electric drive system inlet water temperature, and the required flow rate of each component in the electric drive cycle at the extreme temperature.

[0088] It should be noted that when the thermal management system switches from heating or cooling mode to standby or off mode, the control logic for Chiller_FlowReq needs to maintain the corresponding value in the table above for 10 seconds. The control requirements are the same as calculated above, but with higher priority than the control logic in standby or off mode. Furthermore, in standby or off mode, Chiller_FlowReq = 0.

[0089] For example, when the battery is passively cooled, the flow requirement (BattPassive_FlowReq) for the water-cooled chiller can be expressed as:

[0090] BattPassive_FlowReq=60L / min

[0091] For example, when the multi-way valve is in the switching state, the PWM frequency of the chiller water pump needs to be adjusted to 30% of its original value to reduce the impact on the multi-way valve; this requirement has the highest priority. The PWM frequency of the battery water pump maintains the calculation process in the non-switching state, and the water valve command is sent through {ECU_Ctrl_TargetMode}. Furthermore, when the actual water pump speed control command {FCSPMPSpdSet} is issued, the water pump's PWM frequency needs to be converted into the actual speed, with a maximum speed of 6000 rpm.

[0092] Based on the above steps S1211 to S1215, the water pump control command is determined according to the first speed command, the second speed command, the third speed command and the fourth speed command. This can accurately regulate the cooling or heating requirements of different components in the thermal management system, ensure that key components such as the electric drive system and battery operate efficiently at suitable temperatures, optimize energy utilization, and improve the overall performance and comfort of the vehicle.

[0093] Optionally, in step S12, the control commands for the thermal management system are determined based on the current state parameters and operating mode, including:

[0094] The fan speed command is determined based on the electric drive water circuit cooling request, the electric drive water circuit waste heat recovery request, the multi-way valve operating mode, and the electric drive system inlet water temperature. The electric drive water circuit cooling request, the electric drive water circuit waste heat recovery request, and the electric drive system inlet water temperature are included in the current status parameters.

[0095] Figure 2 This is a schematic diagram of a thermal management system control system according to one embodiment of the present invention, as shown below. Figure 2 As shown, the system includes the following components: radiator, cooling fan, electric drive system, chiller, water-cooled refrigerant, compressor, electronic expansion valve, normally closed expansion valve, water tank 1, water tank 2, water heater, heater, cooler, battery-powered water pump, three-way valve, five-way valve, six-way valve, battery, and corresponding sensors for each component.

[0096] It is understandable that the operating mode of the multi-way valve in step S12 can be... Figures 3-11 Any of the patterns shown in the image.

[0097] Figure 3 This is a schematic diagram of a thermal management control system for a multi-way valve in Mode 1 according to one embodiment of the present invention, as shown below. Figure 3 As shown, in mode 1, the water-cooled chiller water pump is connected in series with the electric drive system, the chiller water pump is connected in series with the cooler and the battery, the battery water pump flow is controlled by the three-way valve 1, and the electric drive system is connected in series with the radiator.

[0098] Mode 1 described above is applicable to scenarios involving motor drive, active battery cooling / temperature equalization, and single-zone cabin refrigeration.

[0099] Figure 4 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 2 according to one embodiment of the present invention, as shown below. Figure 4 As shown, in mode 2, the water-cooled chiller water pump is connected in series with the electric drive system and the heater, the chiller water pump is connected in series with the cooler and the battery, the battery water pump flow is controlled by the three-way valve 1, and the electric drive system is connected in series with the radiator.

[0100] Mode 2 described above is applicable to scenarios such as electric drive cooling, active battery cooling / temperature equalization, cabin single-zone cooling and heating, and radiator defrosting.

[0101] Figure 5 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 3 according to one embodiment of the present invention, as shown below. Figure 5 As shown, in mode 3, the water-cooled chiller pump is connected in series with the heater and battery, the chiller pump is connected in series with the electric drive system, and the radiator dissipates heat.

[0102] Mode 3 described above is applicable to PTC heated batteries and cabins, heat pump heated batteries and cabins, and electric drive cooling scenarios.

[0103] Figure 6 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 3-1 according to one embodiment of the present invention, as shown below. Figure 6 As shown, in mode 3-1, the water-cooled chiller water pump is connected in series with the heater and battery, the chiller water pump is connected in series with the electric drive system, and the radiator is bypassed.

[0104] Mode 3-1 above is applicable to PTC heated batteries and cabins, heat pump heated batteries and cabins, and electric drive heat storage scenarios.

[0105] Figure 7 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 4 according to one embodiment of the present invention, as shown below. Figure 7 As shown, in mode 4, the water-cooled chiller pump is connected in series with a heater, and the chiller pump is connected in series with an electric drive system.

[0106] Mode 4 above is applicable to PTC heated batteries and cabins, heat pump heated batteries and cabins, and electric drive cooling scenarios.

[0107] Figure 8 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 4-1 according to one embodiment of the present invention, as shown below. Figure 8 As shown, in mode 4-1, the water-cooled chiller water pump is connected in series with a heater, the chiller water pump is connected in series with an electric drive system, and the electric drive system recovers waste heat.

[0108] Mode 4-1 above is applicable to scenarios such as PTC heated cabin, heat pump heated cabin, battery temperature equalization / no demand, and electric drive waste heat recovery.

[0109] Figure 9 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 5 according to one embodiment of the present invention, as shown below. Figure 9 As shown, in mode 5, the water-cooled chiller water pump is connected in series with the battery, and the chiller water pump is connected in series with the electric drive system.

[0110] Mode 5 above is applicable to PTC heated batteries, heat pump heated batteries, and electric drive cooling scenarios.

[0111] Figure 10 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 5-1 according to one embodiment of the present invention, as shown below. Figure 10 As shown, in mode 5-1, the water-cooled chiller water pump is connected in series with the battery, the chiller water pump is connected in series with the electric drive system, and the radiator is bypassed.

[0112] Mode 5-1 above is applicable to PTC heated batteries, heat pump heated batteries, and electric drive heat storage scenarios.

[0113] Figure 11 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 7 according to one embodiment of the present invention, as shown below. Figure 11 As shown, the water-cooled chiller pump is connected in series with a heater, the chiller pump is connected in series with an electric drive system and a battery, and the electric drive system is used for heat dissipation.

[0114] Mode 7 described above is applicable to scenarios involving electric drive cooling, passive battery cooling, battery waste heat recovery, and heat pump / PTC heated cabins.

[0115] Figure 12 This is a schematic diagram of a thermal management control system for a multi-way valve in mode 8 according to one embodiment of the present invention, as shown below. Figure 12 As shown, in mode 8, all components are in a fully connected series state.

[0116] Mode 8 described above is applicable to waste heat heating batteries and cabin scenarios.

[0117] For example, the fan speed command can be determined based on the electric drive water circuit cooling request, the electric drive water circuit waste heat recovery request, the multi-way valve operating mode, and the electric drive system inlet water temperature using Table 4.

[0118] Table 4 Fan Speed ​​Command Table

[0119]

[0120] In Table 4, Flg_BattPassiClg is the flag for passive battery cooling, T_EDU_Win is the water inlet temperature of the electric drive system, and T_Batt_CWTrgt is the battery's requested cold water temperature.

[0121] Table 5 shows the relationship between the fan speed, fan speed setting, and electric drive system inlet water temperature for non-battery-cooled cabin heating (Flg_BattClg_CabinHtg=0).

[0122] Table 5. Relationship between fan speed, fan speed setting, and inlet water temperature of the electric drive system for cooling the water circuit.

[0123]

[0124] Table 6 shows the relationship between the fan speed, fan speed setting, and water inlet temperature of the electric drive system for the electric drive water circuit cooling request under the battery-cooled cabin heating condition (Flg_BattClg_CabinHtg=1).

[0125] Table 6. Relationship between fan speed, fan speed setting, and inlet water temperature of the electric drive system for cooling the water circuit.

[0126]

[0127] The relationship between fan speed, fan speed setting, ambient temperature, and chiller water pump outlet temperature for the electric drive water circuit cooling requirement is shown in Table 7.

[0128] Table 7 Fan speed, fan speed setting, and ambient temperature required for cooling the electric drive water circuit

[0129] Relationship with chiller water pump outlet temperature

[0130]

[0131] In Table 7, AMT represents the ambient temperature, and T_Chiller_WOut represents the outlet water temperature of the chiller water pump.

[0132] Based on the above optional embodiments, the fan speed command is determined according to the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, the working mode of the multi-way valve and the water temperature entering the electric drive system. It can intelligently respond to the real-time temperature requirements of the electric drive system, optimize the heat exchange process by adjusting the fan speed, realize efficient heat energy exchange between the electric drive system and the environment, avoid overheating or overcooling of the electric drive system, and ensure the stability and safety of vehicle operation.

[0133] Optionally, in step S12, the control commands for the thermal management system are determined based on the current state parameters and operating mode, including:

[0134] Based on the current status and demand mode of the multi-way valve, determine the multi-way valve control command and output it as the control command for the thermal management system; or,

[0135] Based on the target water inlet temperature of the battery, the control command for the multi-way valve is determined and output as the control command for the thermal management system. The current state of the multi-way valve and the target water inlet temperature of the battery are included in the current state parameters.

[0136] Based on the current state and demand mode of the multi-way valve, the control command for the multi-way valve is determined and output as the control command for the thermal management system. Specifically, when the multi-way valve is in the target position, three-way valves 1 and 2 are controlled as follows, where 3WValveMode_Req represents the three-way valve mode requirement:

[0137] 1) When 3WValveMode_Req=0, all channels are 21.

[0138] 2) When 3WValveMode_Req=1, all are 23 channels;

[0139] 3) When 3WValveMode_Req=2, the three-way valve 1 adjusts the battery water temperature in a closed loop by adjusting its position, and the three-way valve 2 is at the 50% position.

[0140] When the multi-way valve is in the switching state, three-way valves 1 and 2 are controlled as follows:

[0141] 1) When 3WValveMode_Req=0, all channels are 21.

[0142] 2) When 3WValveMode_Req=1, all are 23 channels;

[0143] 3) When 3WValveMode_Req=2, three-way valve 1 is in the middle position, allocating 70% of the cabin and 30% of the battery, while three-way valve 2 is in the 50% position.

[0144] Based on the target water inlet temperature of the battery, the control command for the multi-way valve is determined and output as the control command for the thermal management system. Specifically, the control command for the multi-way valve can be determined with the target water inlet temperature of the battery as the control target and the target water inlet temperature of the battery as the target value.

[0145] For example, the control commands for the three-way valve 1 are shown in Table 8.

[0146] Table 8 Control Commands for Three-Way Valve 1

[0147]

[0148] In Table 8, T_Batt_Win represents the battery's initial water temperature, and T_Batt_CWTrgt represents the battery's target initial water temperature. When T_Batt_Max > 40℃ || T_Batt_Max > 35℃ && fast charging is in progress, the battery has higher priority. When non-battery functions have higher priority && AMT > 35℃ && T_Incar > 30℃, the battery has higher priority.

[0149] Based on the above optional embodiments, the control command for the multi-way valve is determined according to its current state and demand mode, or based on the target inlet water temperature of the battery, and output as a control command for the thermal management system. This enables precise control of the fluid path in the thermal management system, thereby optimizing battery temperature management. This strategy ensures that the battery operates within its optimal temperature range, thereby improving battery efficiency, extending battery life, and enhancing the overall performance and driving experience of the vehicle.

[0150] Optionally, based on the current status parameters and operating mode, the control commands for the thermal management system include:

[0151] In response to the current state parameters meeting the preset compressor start-up conditions, the compressor speed command is determined and output as a control command for the thermal management system based on the working mode, the target inlet water temperature of the chiller, and the target outlet water temperature of the PTC. The target inlet water temperature of the chiller and the target outlet water temperature of the PTC are included in the current state parameters.

[0152] The above-mentioned preset compressor start-up conditions are:

[0153] 1) Main high-voltage relay closed && thermal management high-voltage relay closed, AND

[0154] 2) No R290 leakage signal, AND

[0155] 3) FlgMWVlvPosiMeet==1, AND

[0156] 4) WCCPumpPWM ≥ preset value && ChillerPumpPWM ≥ preset value, AND

[0157] 5) SOV ON, AND

[0158] 6) EXV_Posi > 53, AND

[0159] 7) Meets the compressor's protection function requirements.

[0160] 8) There are no component malfunctions that would prevent the compressor from starting.

[0161] The above FlgMWVlvPosiMeet indicates the position of the multi-way valve, WCCPumpPWM indicates the actual PWM of the water pump in the water-cooled chiller, SOV indicates the normally closed expansion valve, and EXV_Posi indicates the actual position of the electronic expansion valve. "No R290 leakage signal" means that the air leakage values ​​of both R290 sensors are 0; otherwise, an R290 leak is detected.

[0162] R290 is the code for a refrigerant, representing propane. In the air conditioning and refrigeration industry, R290 is considered a replacement for traditional fluorinated refrigerants such as R134a in some applications due to its environmentally friendly properties (zero ozone depletion potential (ODP) and low global warming potential (GWP)). However, because propane is highly flammable, special safety precautions are required during its use to prevent the risk of fire or explosion.

[0163] Compressor control is divided into four stages: compressor shutdown, startup, normal operation, and shutdown.

[0164] 1) When the actual compressor speed is 0, the compressor is in a complete shutdown phase, and Flg_Compsts=0 is set;

[0165] 2) When the continuous time during which the actual compressor speed > 0 is less than the preset time threshold, the compressor is in the soft start phase, and Flg_Compsts=1 is set.

[0166] 3) When the compressor's actual speed > 0 for a continuous period of time is greater than or equal to the preset time threshold, the compressor is in normal operation. Set Flg_Compsts=2.

[0167] The compressor speed control strategy is as follows:

[0168] 1) If the compressor is not allowed to start, the compressor speed command Comp_Trgt = 0;

[0169] 2) If the compressor is allowed to start &&Flg_Compsts=1, then the compressor speed command Comp_Trgt=600;

[0170] 3) Otherwise, the compressor is in the Comp_Trgt closed-loop control target.

[0171] For example, the relationship between the operating mode, the target inlet water temperature of the chiller, and the target outlet water temperature of the PTC is shown in the table below. Figure 9 As shown.

[0172] Table 9. Relationship between operating mode, target inlet water temperature of chiller, and target outlet water temperature of PTC

[0173]

[0174] In Table 9, T_Chiller_Trgt represents the target inlet water temperature of the chiller, and T_PTC_Trgt represents the target outlet water temperature of the PTC. It should be noted that during normal operation, the compressor's output speed is limited to ±200 rpm / s.

[0175] Based on the above optional embodiments, the compressor speed command is determined according to the working mode, the target inlet water temperature of the chiller, and the target outlet water temperature of the PTC, and the compressor speed command is output as the control command of the thermal management system. This enables precise control of the compressor's operating status, thereby optimizing the efficiency and performance of the entire thermal management system. This method allows the thermal management system to respond more flexibly and intelligently to different working environments and needs. For example, when rapid cooling is required, the compressor speed can be adjusted according to the target inlet water temperature of the chiller to quickly achieve the required cooling effect. When heating is required, the compressor's working status can be adjusted according to the target outlet water temperature of the PTC to ensure heating efficiency. At the same time, through real-time monitoring and adjustment, overheating or overcooling can be effectively avoided, protecting various components in the system, extending their service life, and automatically adjusting according to different operating conditions to improve energy utilization efficiency and reduce energy consumption.

[0176] Optionally, in step S12, the control commands for the thermal management system are determined based on the current state parameters and operating mode, including:

[0177] Based on the working mode and compressor operating status, the expansion valve control command is determined and output as the thermal management system control command. The compressor operating status is included in the current status parameters.

[0178] The expansion valves mentioned above include electronic expansion valves and normally closed expansion valves. The control of electronic expansion valves is related to the refrigerant system mode requirements and the compressor's operating stage, as shown in Table 10. The control of normally closed expansion valves is also related to the refrigerant system mode requirements and the compressor's operating stage, as shown in Table 11.

[0179] Table 10 Electronic Expansion Valve Control Relationship Table

[0180]

[0181] In Table 10, Flg_Compsts represents the compressor operating status flag bit, where 0 indicates that the compressor is not in operating state, 1 indicates that the compressor is in soft start state with a low speed, and 2 indicates that the compressor is in normal operating state. SH_PT_ComPIn represents the compressor suction superheat, and NA represents the control target.

[0182] Flg_Compsts=0:30% indicates that the compressor is not in operation and the electronic expansion valve is open at 30%. Flg_Compsts=2:7 indicates that the compressor is in a soft-start state and the compressor suction superheat is 7. Similarly, the other values ​​in Table 10 can be determined based on the above examples, and will not be elaborated here.

[0183] Table 11 Control Relationships of Normally Closed Expansion Valves

[0184]

[0185] In Table 11, Comp_Spd is the compressor speed, P_CompOut is the compressor discharge pressure, and Abs(x) represents the absolute value of x.

[0186] Based on the above optional embodiments, the expansion valve control command is determined and output as the thermal management system control command according to the working mode and compressor operating status. This enables more precise adjustment of the refrigerant flow and pressure of the refrigeration system, thereby improving the system's energy efficiency ratio and response speed, and ensuring the stability and efficiency of the cooling or heating process.

[0187] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0188] This disclosure also provides a thermal management system control system for implementing the above embodiments and preferred embodiments, which will not be repeated hereafter. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0189] Figure 13 This is a structural block diagram of a thermal management system control system according to one embodiment of the present disclosure, such as... Figure 13 As shown, the system includes:

[0190] The acquisition module 1301 is used to acquire the current status parameters and operating mode of the thermal management system;

[0191] The determination module 1302 is used to determine the thermal management system control command based on the current status parameters and operating mode, wherein the thermal management system control command is used to control the operating status of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve.

[0192] Optionally, the determining module 1302 is further configured to: in response to the operating mode being a cooling operating mode, determine the flow requirement of the water-cooled chiller based on the compressor discharge pressure and determine a first speed command for the chiller water pump based on the flow requirement of the water-cooled chiller; in response to the operating mode being a cooling operating mode, determine the flow requirement of the chiller based on the opening degree of the three-way valve towards the battery and the chiller outlet water temperature and determine a second speed command for the chiller water pump based on the flow requirement of the chiller; in response to the operating mode being a heating operating mode, determine the flow requirement of the chiller based on the compressor suction pressure and the inlet water temperature of the electric drive system and determine a second speed command for the chiller water pump based on the cooling operating mode. The flow rate requirement determines the third speed command for the chiller water pump; based on the flow rate requirements of each component in the electric drive cycle at extreme temperatures, the flow rate requirement for the electric drive circuit is determined, and the fourth speed command for the electric drive circuit water pump is determined based on the flow rate requirements of the electric drive circuit; based on the first, second, third, and fourth speed commands, the water pump control command is determined; among these, the compressor discharge pressure, the opening degree of the three-way valve towards the battery, the chiller outlet water temperature, the compressor suction pressure, the electric drive system inlet water temperature, and the flow rate requirements of each component in the electric drive cycle at extreme temperatures are included in the current state parameters.

[0193] Optionally, the determining module 1302 is further configured to: determine the fan speed command based on the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, the multi-way valve operating mode and the electric drive system inlet water temperature, wherein the electric drive water circuit heat dissipation request, the electric drive water circuit waste heat recovery request, and the electric drive system inlet water temperature are included in the current status parameters.

[0194] Optionally, the determining module 1302 is further configured to: determine the multi-way valve control command and output the multi-way valve control command as a thermal management system control command based on the current state of the multi-way valve and the multi-way valve demand mode; or, determine the multi-way valve control command and output the multi-way valve control command as a thermal management system control command based on the target water inlet temperature of the battery, wherein the current state of the multi-way valve and the target water inlet temperature of the battery are included in the current state parameters.

[0195] Optionally, the determining module 1302 is further configured to: in response to the current state parameters satisfying the preset compressor start-up conditions, determine the compressor speed command based on the working mode, the chiller target inlet water temperature and the PTC target outlet water temperature, and output the compressor speed command as a thermal management system control command, wherein the chiller target inlet water temperature and the PTC target outlet water temperature are included in the current state parameters.

[0196] Optionally, the determining module 1302 is further configured to: determine the expansion valve control command based on the working mode and the compressor operating status, and output the expansion valve control command as the thermal management system control command, wherein the compressor operating status is included in the current status parameters.

[0197] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0198] According to another aspect of the present invention, a vehicle is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the thermal management system control method of the present invention during runtime.

[0199] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0200] S1, obtain the current status parameters and operating mode of the thermal management system;

[0201] S2, based on the current status parameters and operating mode, determine the thermal management system control command, wherein the thermal management system control command is used to control the operating status of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve.

[0202] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the storage medium is located to execute the thermal management system control method of the present invention.

[0203] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0204] S1, obtain the current status parameters and operating mode of the thermal management system;

[0205] S2, based on the current status parameters and operating mode, determine the thermal management system control command, wherein the thermal management system control command is used to control the operating status of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve.

[0206] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0207] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the thermal management system control method of the present invention.

[0208] Optionally, in this embodiment, the above-mentioned computer program product can be configured as a computer program that performs the following steps:

[0209] S1, obtain the current status parameters and operating mode of the thermal management system;

[0210] S2, based on the current status parameters and operating mode, determine the thermal management system control command, wherein the thermal management system control command is used to control the operating status of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve.

[0211] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0212] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0213] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0214] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0215] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0216] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for a thermal management system, characterized in that, include: Obtain the current status parameters and operating mode of the thermal management system; Based on the current status parameters and the operating mode, a thermal management system control command is determined, wherein the thermal management system control command is used to control the operating status of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve; The step of determining the thermal management system control command based on the current state parameters and the operating mode includes: responding to the operating mode being a cooling mode, determining the water-cooled chiller flow requirement based on the compressor discharge pressure and determining a first speed command for the water-cooled chiller pump based on the water-cooled chiller flow requirement; responding to the operating mode being a cooling mode, determining the chiller flow requirement based on the opening degree of the three-way valve towards the battery and the chiller outlet water temperature and determining a second speed command for the chiller pump based on the chiller flow requirement; responding to the operating mode being a heating mode, determining the chiller flow requirement based on the compressor suction pressure and the electric drive system inlet water temperature and... The third speed command for the chiller water pump is determined based on the chiller flow demand; the flow demand for the electric drive circuit is determined based on the flow demand of each component in the electric drive cycle at the extreme temperature, and the fourth speed command for the electric drive circuit water pump is determined based on the electric drive circuit flow demand; the water pump control command is determined based on the first speed command, the second speed command, the third speed command, and the fourth speed command; wherein, the compressor discharge pressure, the opening degree of the three-way valve towards the battery, the chiller outlet water temperature, the compressor suction pressure, the electric drive system inlet water temperature, and the flow demand of each component in the electric drive cycle at the extreme temperature are included in the current state parameters.

2. The thermal management system control method according to claim 1, characterized in that, The step of determining the thermal management system control command based on the current state parameters and the operating mode includes: The fan speed command is determined based on the electric drive water circuit cooling request, the electric drive water circuit waste heat recovery request, the multi-way valve operating mode, and the electric drive system inlet water temperature. The electric drive water circuit cooling request, the electric drive water circuit waste heat recovery request, and the electric drive system inlet water temperature are included in the current state parameters.

3. The thermal management system control method according to claim 1, characterized in that, The step of determining the thermal management system control command based on the current state parameters and the operating mode includes: Based on the current state and demand mode of the multi-way valve, determine the multi-way valve control command and output the multi-way valve control command as the control command for the thermal management system; or, Based on the target water inlet temperature of the battery, a multi-way valve control command is determined and output as the control command of the thermal management system. The current state of the multi-way valve and the target water inlet temperature of the battery are included in the current state parameter.

4. The thermal management system control method according to claim 1, characterized in that, The step of determining the thermal management system control command based on the current state parameters and the operating mode includes: In response to the current state parameters satisfying the preset compressor start-up conditions, the compressor speed command is determined and output as the control command of the thermal management system based on the working mode, the target inlet water temperature of the chiller and the target outlet water temperature of the PTC. The target inlet water temperature of the chiller and the target outlet water temperature of the PTC are included in the current state parameters.

5. The thermal management system control method according to claim 1, characterized in that, The step of determining the thermal management system control command based on the current state parameters and the operating mode includes: Based on the operating mode and compressor operating status, the expansion valve control command is determined and output as the thermal management system control command, wherein the compressor operating status is included in the current status parameter.

6. A thermal management system control system, characterized in that, include: The acquisition module is used to acquire the current status parameters and operating mode of the thermal management system; The determination module is used to determine the thermal management system control command based on the current state parameters and the working mode, wherein the thermal management system control command is used to control the working state of at least one of the water pump, fan, PTC heater, proportional valve, compressor and expansion valve; The determining module is further configured to: in response to the operating mode being a cooling operating mode, determine the flow requirement of the water-cooled chiller based on the compressor discharge pressure and determine a first speed command for the water-cooled chiller pump based on the flow requirement of the water-cooled chiller; in response to the operating mode being a cooling operating mode, determine the flow requirement of the chiller based on the opening degree of the three-way valve towards the battery and the chiller outlet water temperature and determine a second speed command for the chiller pump based on the flow requirement of the chiller; in response to the operating mode being a heating operating mode, determine the flow requirement of the chiller based on the compressor suction pressure and the inlet water temperature of the electric drive system and determine a second speed command for the water pump based on the flow requirement of the chiller. The third speed command for the chiller water pump; the flow requirement of the electric drive circuit is determined based on the flow requirements of each component in the electric drive cycle at extreme temperatures, and the fourth speed command for the electric drive circuit water pump is determined based on the flow requirements of the electric drive circuit; the water pump control command is determined based on the first speed command, the second speed command, the third speed command, and the fourth speed command; wherein, the compressor discharge pressure, the opening degree of the three-way valve towards the battery, the chiller outlet water temperature, the compressor suction pressure, the electric drive system inlet water temperature, and the flow requirements of each component in the electric drive cycle at extreme temperatures are included in the current state parameters.

7. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the method according to any one of claims 1 to 5.

9. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method according to any one of claims 1 to 5.

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