Vehicle thermal management system control method, apparatus, and readable storage medium

Abstract

The application relates to the technical field of vehicle thermal management, and particularly discloses a vehicle thermal management system control method, device and readable storage medium. The method comprises the following steps: determining a plurality of temperature difference values according to a plurality of first temperature data and a preset target temperature; determining a target flow corresponding to each heat dissipation branch according to a preset first mapping model and the plurality of temperature difference values; determining a target rotating speed of a target water pump participating in operation in a plurality of water pumps according to the target flow and a connection state; determining a working mode of the vehicle thermal management system according to the plurality of temperature difference values and a preset threshold value; when the working mode is a first mode, independently connecting the plurality of target water pumps and the corresponding heat dissipation branches; when the working mode is a second mode, connecting at least two target water pumps in parallel to a target heat dissipation component; and adjusting the rotating speed of the water pump and the opening degree of a valve group according to temperature feedback data, a temperature interval corresponding to the preset target temperature and the target rotating speed. The application realizes precise temperature control through the cooperation of the multiple-pump valve group.

Description

Technical Field

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

[0002] In related technologies, the existing vehicle thermal management system adopts a single water circuit and single water pump architecture, which has poor adaptability and cannot meet the needs of complex scenarios with multiple branches and different temperatures. The water circuit needs to be rearranged, which increases costs and makes the layout difficult. Summary of the Invention

[0003] The present invention aims to at least solve the technical problem in the prior art or related technologies that the thermal management of a single water circuit and single water pump architecture results in poor adaptability and cannot meet the needs of complex scenarios with multiple branches and different temperatures.

[0004] Therefore, the first aspect of the present invention provides a control method for a vehicle thermal management system.

[0005] A second aspect of the present invention provides a vehicle thermal management system control device.

[0006] A third aspect of the present invention provides another vehicle thermal management system control device.

[0007] The fourth aspect of this application proposes a readable storage medium.

[0008] In view of this, a first aspect of the present invention provides a vehicle thermal management system control method. The method is used in a vehicle thermal management system, which includes: multiple heat dissipation components, multiple water pumps, and a valve assembly. The method includes: acquiring first temperature data and a preset target temperature for each of the multiple heat dissipation components; determining multiple temperature differences based on the multiple first temperature data and the preset target temperature; determining a target flow rate corresponding to each heat dissipation branch based on a preset first mapping model and the multiple temperature differences, wherein the first mapping model is used to map the correspondence between temperature and flow rate; acquiring the connection state of the valve assembly; and determining the target rotational speed of the target water pump participating in operation among the multiple water pumps based on the target flow rate and the connection state; and determining the target flow rate of each heat dissipation branch corresponding to the multiple temperature differences based on the multiple temperature differences and the preset target temperature. A preset threshold is used to determine the operating mode of the vehicle thermal management system, which includes a first mode and a second mode. In the first mode, the control valve group independently connects multiple target water pumps to their corresponding cooling branches and adjusts the speed of the multiple target water pumps to the target speed. In the second mode, the control valve group connects at least two target water pumps in parallel to the target cooling components and adjusts the speed of the at least two parallel target water pumps to the target speed. Temperature feedback data of multiple cooling components is acquired, and the speed of the water pumps and the opening of the valve group are adjusted according to the temperature feedback data, the temperature range corresponding to the preset target temperature, and the target speed so that the temperature feedback data falls within the temperature range corresponding to the preset target temperature.

[0009] In this application, heat dissipation components refer to core components in a vehicle's thermal management system that require temperature control, including controllers, drive motors, batteries, and hydraulic retarders. These components generate a large amount of heat during operation, and heat accumulation can lead to performance degradation or even failure. The first temperature data refers to the real-time temperature value of the heat dissipation components collected by temperature sensors. This data forms the basis for the system to determine the current thermal state of the heat dissipation components. Temperature sensors are installed at the inlet or outlet of the heat dissipation components to accurately reflect their actual temperature. The preset target temperature refers to the optimal operating temperature calibrated based on the performance parameters of the heat dissipation components. Different heat dissipation components have different preset target temperatures; for example, the preset target temperature for a motor is 65°C, and for a battery it is 30°C. This temperature is a key indicator for ensuring efficient and stable operation of the components. The temperature difference refers to the absolute value between the first temperature data and the preset target temperature. This is the core basis for the system to determine heat dissipation requirements. The larger the temperature difference, the higher the heat load on the heat dissipation components, and the greater the required coolant flow rate. The first mapping model refers to a mathematical model obtained by fitting a thermodynamic formula with bench tests. The thermodynamic formula is Q=m×c×ΔT, where Q is the flow rate, m is the mass of the coolant, c is the specific heat capacity of the coolant, and ΔT is the temperature difference. The function of the model is to establish the correspondence between the temperature difference and the target flow rate, so as to achieve accurate calculation of the flow rate requirement.

[0010] The target flow rate refers to the coolant flow rate that meets the current heat dissipation requirements of the heat dissipation components. Specifically, it is the coolant flow rate required for each heat dissipation branch and serves as the target basis for adjusting the pump speed and valve opening of the system.

[0011] A valve assembly refers to an integrated multi-way proportional valve assembly, which has at least two inlets and two outlets. The inlets are connected to the water pump in a one-to-one correspondence, and the outlets are connected to the heat dissipation branch or the target heat dissipation component in a corresponding correspondence. The valve assembly is the core component that enables flexible connection between the water pump and the heat dissipation branch.

[0012] The connectivity status refers to the connection method of the internal flow channels of the valve group, including two core statuses: single pump connected to a single branch and multiple pumps connected in parallel to a single target heat dissipation component. The connectivity status determines the flow path of the coolant. The target pump refers to the pump selected by the system to participate in operation based on the target flow rate and the connectivity status of the valve group. The number and combination of target pumps will be dynamically adjusted according to the heat dissipation requirements.

[0013] The target speed refers to the operating speed of the water pump calculated based on the target flow rate and the pump's speed-flow-head characteristic curve. It is a key parameter to ensure the water pump outputs the target flow rate, and different target flow rates correspond to different target speeds.

[0014] The first mode refers to the conventional heat dissipation mode, suitable for scenarios where the temperature difference between all heat dissipation components does not exceed a preset threshold. In the first mode, each water pump is independently connected to its corresponding heat dissipation branch, achieving differentiated temperature control across multiple branches. The second mode refers to the combined heat dissipation mode, suitable for scenarios where the temperature difference between any heat dissipation component exceeds a preset threshold. In the second mode, at least two water pumps are connected in parallel to the target heat dissipation component, achieving enhanced heat dissipation with a large flow rate. Temperature feedback data refers to the real-time temperature data of the heat dissipation components collected by the system during the adjustment of the water pumps and valve groups. This data is from the same source as the first temperature data and is used to determine whether the temperature of the heat dissipation component has reached the preset target temperature range. The temperature range corresponding to the preset target temperature refers to the temperature fluctuation range based on the preset target temperature. Within this temperature fluctuation range, the heat dissipation component can operate stably, serving as the endpoint judgment basis for the system's feedback adjustment.

[0015] This application solves the problems of poor adaptability, insufficient heat dissipation under high heat load, and low temperature control accuracy of single-pump thermal management systems by using a collaborative control architecture of multiple water pumps and valve groups, thereby achieving precise temperature control in complex scenarios with multiple branches.

[0016] In the execution of the method of this application, the first step is temperature acquisition and difference calculation. The system acquires the first temperature data of each heat dissipation component through temperature sensors, calculates the temperature difference in combination with the preset target temperature, and completes the preliminary determination of heat dissipation requirements. The second step is target flow rate calculation. Based on the first mapping model, the system converts the temperature difference into the target flow rate of each heat dissipation branch, establishing the correlation between temperature requirements and flow rate requirements. The third step is target pump and target speed determination. The system acquires the current connection status of the valve group, filters out the target pumps that need to participate in the operation in combination with the target flow rate, and calculates the target speed according to the pump speed-flow-head characteristic curve. The fourth step is working mode determination. The system compares the temperature difference with the preset threshold to determine the current working mode to be adopted. If all temperature differences do not exceed the threshold, the system enters the first mode; if any temperature difference exceeds the threshold, the system enters the second mode. The fifth step is mode execution. In the first mode, the system control valve group connects each target water pump to its corresponding heat dissipation branch independently and adjusts the pump speed to the target speed to achieve independent temperature control of multiple branches. In the second mode, the system control valve group connects at least two target water pumps in parallel to the target heat dissipation component and adjusts the speed of the parallel water pumps to the target speed, aggregating the flow output of multiple water pumps to form a large flow heat dissipation channel. The sixth step is closed-loop feedback regulation. The system collects the temperature feedback data of the heat dissipation component in real time, compares it with the temperature range corresponding to the preset target temperature, and dynamically adjusts the pump speed and valve group opening until the temperature feedback data falls into the range, thus completing precise temperature control.

[0017] The entire process forms a closed-loop control system encompassing temperature acquisition, demand determination, parameter calculation, mode execution, and feedback adjustment. Through the flexible connectivity of the valve group, it can meet the diverse conventional heat dissipation needs of multiple branches, as well as cope with the enhanced heat dissipation needs of a single component under high heat load, thereby improving the adaptability and control accuracy of the thermal management system.

[0018] In some technical solutions of this application, the first mode is a conventional heat dissipation mode in which all temperature differences do not exceed a preset threshold; the second mode is a combined heat dissipation mode in which any temperature difference exceeds a preset threshold.

[0019] In this technical solution, the conventional heat dissipation mode refers to the operating mode when the temperature difference between all heat dissipation components does not exceed a preset threshold. The core objective of the system in the conventional heat dissipation mode is to maintain the temperature of each heat dissipation component stable near the preset target temperature, achieving differentiated temperature control across multiple branches. The combined heat dissipation mode refers to the operating mode when the temperature difference between any heat dissipation component exceeds a preset threshold. The core objective of the system in the combined heat dissipation mode is to rapidly reduce the temperature of components with high heat loads, preventing components from overheating and degrading.

[0020] Based on the comparison between temperature differences and preset thresholds, this application determines that the current heat load is at a normal level when the system calculates that the temperature differences of all heat dissipation components do not exceed the preset threshold, triggering the first mode, i.e., the normal heat dissipation mode. In this mode, the system controls the valve group to independently connect each target water pump to its corresponding heat dissipation branch, with each pump providing precise flow to its corresponding branch to meet the differentiated heat dissipation needs of multiple branches. When the system calculates that the temperature difference of any heat dissipation component exceeds the preset threshold, it determines that the component is in a high heat load state, triggering the second mode, i.e., the combined heat dissipation mode. In this mode, the system controls the valve group to switch flow channels, connecting at least two target water pumps in parallel to the high heat load component, aggregating the flow output of multiple pumps to provide a coolant flow rate far exceeding that of a single pump, quickly removing the instantaneous high heat from the component.

[0021] The triggering conditions for the two modes are clear and explicit, enabling seamless switching of the thermal management system between conventional and enhanced heat dissipation scenarios, and ensuring the system's adaptability under different heat loads.

[0022] In some technical solutions of this application, the vehicle thermal management system control method further includes: acquiring the operating parameters of the water pump and the status parameters of the valve group according to a preset cycle, wherein the operating parameters of the water pump include speed, current and voltage, and the status parameters of the valve group include opening degree and operating current.

[0023] In this technical solution, the preset cycle refers to the fixed time interval for the system to monitor the pump operating parameters and valve group status parameters. The setting of the preset cycle needs to balance the real-time nature of the monitoring and the system's energy consumption, and is usually calibrated based on the thermal response characteristics of the heat dissipation components. Pump operating parameters are key indicators reflecting the pump's working status, including speed, current, and voltage. Speed ​​directly determines the pump's flow output, while current and voltage reflect the pump's operating conditions; abnormal parameters indicate a potential pump malfunction. Valve group status parameters are key indicators reflecting the valve group's working status, including opening degree and operating current. Valve opening degree determines the flow capacity of the flow channel, while operating current reflects the valve group's driving state; abnormal parameters indicate potential valve group malfunctions such as jamming.

[0024] In this technical solution, the system continuously collects the pump's speed, current, and voltage parameters, as well as the valve assembly's opening degree and operating current parameters, according to a preset cycle. These parameters are used as the basis for judging the equipment's operating status and are transmitted in real time to the data processing module for analysis. Through continuous monitoring, the system can promptly detect early abnormalities in the pump and valve assembly, preventing the fault from escalating and laying a data foundation for subsequent fault handling. In some technical solutions of this application, after obtaining the pump's operating parameters and the valve assembly's status parameters, the method further includes: when abnormal speed or excessive current is detected in the pump's operating parameters, determining the pump's operating status as a fault state; in the fault state, controlling the valve assembly to cut off the passage of the faulty pump and redistributing the target flow share according to the remaining pump's rated power ratio.

[0025] In this technical solution, a fault state refers to the operating state of the water pump with abnormal speed or excessive current. Abnormal speed includes speed higher or lower than the target speed, and excessive current refers to current exceeding the rated current of the water pump. Under fault conditions, the water pump cannot output the target flow rate normally. The rated power ratio refers to the ratio of the rated power of each normal water pump to the sum of the rated power of all normal water pumps, which is the basis for the system to redistribute the flow share.

[0026] This application describes a system that, upon detecting abnormal pump speed or excessive current, first determines that the pump is in a faulty state. Then, it immediately controls the valve group to cut off the flow of the faulty pump to prevent it from affecting the operation of the entire system. Next, the system redistributes the target flow share according to the rated power ratio of the remaining normal pumps. Then, it calculates the target speed of each normal pump based on the new flow share and adjusts the speed of the normal pumps to the new target speed to ensure that the total flow meets the heat dissipation requirements.

[0027] In some technical solutions of this application, after obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: when the status parameters of the valve group are detected to exceed the preset range, determining that the working state of the valve group is a fault state, triggering an alarm signal and controlling the valve group to switch to the preset emergency flow channel.

[0028] In this technical solution, the valve group fault state refers to the operating state of the valve group when its state parameters exceed the preset range, including situations such as the inability to adjust the valve opening and abnormal operating current. Under fault conditions, the valve group cannot achieve normal flow channel switching. The alarm signal is a prompt signal issued by the system after detecting a valve group fault, used to remind operators to handle the fault promptly.

[0029] Pre-set emergency flow channels refer to backup flow channels pre-installed inside the valve assembly, used to maintain basic heat dissipation function and prevent heat dissipation components from overheating when the valve assembly fails.

[0030] This application describes a system that, upon detecting that the valve group's status parameters exceed a preset range, determines that the valve group is in a faulty state and immediately triggers an alarm signal. Simultaneously, it controls the valve group to switch to a preset emergency flow channel. The emergency flow channel enables basic communication between the water pump and the core heat dissipation components, ensuring that the core components receive a minimum supply of coolant, maintaining basic heat dissipation functions, and preventing components from failing due to temperature runaway.

[0031] In some technical solutions of this application, when the temperature feedback data is within the temperature range corresponding to the preset target temperature, the pump speed and valve opening are adjusted based on the energy consumption optimization algorithm so that the temperature feedback data falls into the temperature range corresponding to the preset target temperature.

[0032] In this technical solution, the energy consumption optimization algorithm refers to the algorithm used to optimize the pump speed and valve opening. The core objective of this algorithm is to ensure that the pump and valve operate within the lowest energy consumption range while maintaining the stable temperature of the heat dissipation components. Fine-tuning refers to making small adjustments to the pump speed and valve opening after the temperature feedback data falls within the preset target temperature range. The adjustment range is based on the premise of not affecting temperature stability.

[0033] This application proposes that after the temperature feedback data falls within the temperature range corresponding to the preset target temperature, the system activates an energy consumption optimization algorithm. The algorithm will fine-tune the pump speed and valve opening based on the pump's high-efficiency operating range and the valve group's low flow resistance characteristics. While maintaining temperature stability, it will minimize the pump's operating speed and valve group's flow resistance loss, thereby reducing the system's total power consumption.

[0034] In some technical solutions of this application, the preset threshold is 15℃, and the temperature range corresponding to the preset target temperature is the preset target temperature ±2℃.

[0035] In this technical solution, the preset threshold of 15℃ refers to the critical value for determining whether the heat dissipation component is under high heat load. When the temperature difference exceeds 15℃, it is determined that the component needs to strengthen heat dissipation.

[0036] The preset target temperature range of ±2℃ refers to the allowable temperature fluctuation range of the heat dissipation component. That is, when the actual temperature of the heat dissipation component fluctuates within ±2℃ of the preset target temperature, the component is considered to be in a stable working state.

[0037] The second aspect of this application provides a vehicle thermal management system control device. The device is used in a vehicle thermal management system, which includes multiple heat dissipation components, multiple water pumps, and valve assemblies. The device includes a first acquisition module, a first execution module, a second execution module, a third execution module, a fourth execution module, a fifth execution module, and a sixth execution module. The first acquisition module acquires first temperature data and a preset target temperature for each of the multiple heat dissipation components, and determines multiple temperature differences based on the multiple first temperature data and the preset target temperature. The first execution module determines the target flow rate corresponding to each heat dissipation branch based on a preset first mapping model and the multiple temperature differences. The first mapping model maps the correspondence between temperature and flow rate. The second execution module acquires the connection status of the valve assemblies and determines the target flow rate of each of the multiple water pumps participating in operation based on the target flow rate and the connection status. The target speed of the water pump is specified in the following steps: The third execution module is used to determine the working mode of the vehicle thermal management system based on multiple temperature differences and preset thresholds, wherein the working mode includes a first mode and a second mode; The fourth execution module is used to control the valve group to independently connect multiple target water pumps with their corresponding heat dissipation branches in the first working mode, and adjust the speed of multiple target water pumps to the target speed; The fifth execution module is used to control the valve group to connect at least two target water pumps in parallel to the target heat dissipation components in the second working mode, and adjust the speed of at least two parallel target water pumps to the target speed; The sixth execution module is used to acquire temperature feedback data of multiple heat dissipation components, and adjust the speed of the water pumps and the opening of the valve group according to the temperature feedback data, the temperature range corresponding to the preset target temperature, and the target speed, so that the temperature feedback data falls within the temperature range corresponding to the preset target temperature.

[0038] The vehicle thermal management system control device provided in this application achieves fully automated control of the entire process, from temperature data acquisition, temperature difference calculation, target flow determination, target water pump and target speed selection, working mode determination and execution to closed-loop feedback adjustment, through the coordinated work of the first acquisition module, the first execution module, the second execution module, the third execution module, the fourth execution module, the fifth execution module, and the sixth execution module. In the first mode, it can independently connect each target water pump to its corresponding heat dissipation branch through the control valve group to meet the different conventional heat dissipation needs of multiple branches. In the second mode, it can connect at least two target water pumps in parallel to the target heat dissipation component to provide high flow enhanced heat dissipation to cope with high heat load scenarios. At the same time, it dynamically adjusts the water pump speed and valve group opening based on temperature feedback data to ensure that the temperature of the heat dissipation component is stable within the preset range. It effectively solves the problems of poor adaptability, insufficient heat dissipation under high heat load, and low temperature control accuracy of the existing single water pump thermal management system, and improves the overall heat dissipation efficiency and reliability of the system.

[0039] A third aspect of the present invention provides a vehicle thermal management system control device, comprising: a processor and a memory, wherein the memory stores a program or instructions, and the processor, when executing the program or instructions in the memory, implements the steps of the vehicle thermal management system control method as described in any of the above-described technical solutions. Therefore, the vehicle thermal management system control device possesses all the beneficial effects of the vehicle thermal management system control method as described in any of the above-described technical solutions.

[0040] A fourth aspect of the present invention provides a readable storage medium storing a program or instructions, which, when executed by a processor, implement the steps of the vehicle thermal management system control method as described in any of the above-described technical solutions. Therefore, the readable storage medium possesses all the beneficial effects of the vehicle thermal management system control method as described in any of the above-described technical solutions.

[0041] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0042] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0043] Figure 1 This is a schematic flowchart of a vehicle thermal management system control method according to an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of a multi-pump coordinated control method for a vehicle thermal management system according to an embodiment of the present invention;

[0045] Figure 3 This is one of the schematic block diagrams of a vehicle thermal management system control device according to an embodiment of the present invention;

[0046] Figure 4 This is a second schematic block diagram of a vehicle thermal management system control device according to an embodiment of the present invention. Detailed Implementation

[0047] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0048] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0049] The following reference Figures 1 to 4 A vehicle thermal management system control method, apparatus, and readable storage medium are described according to some embodiments of the present invention.

[0050] like Figure 1 As shown, an embodiment of this application provides a vehicle thermal management system control method. The method is used in a vehicle thermal management system, which includes: multiple heat dissipation components, multiple water pumps, and valve assemblies. The method steps include:

[0051] Step 102: Obtain the first temperature data and preset target temperature of each of the multiple heat dissipation components; and determine multiple temperature differences based on the multiple first temperature data and the preset target temperature.

[0052] Step 104: Determine the target flow rate for each heat dissipation branch based on the preset first mapping model and multiple temperature difference values. The first mapping model is used to map the correspondence between temperature and flow rate.

[0053] Step 106: Obtain the connection status of the valve group, and determine the target speed of the target water pump participating in the operation among multiple water pumps based on the target flow rate and connection status.

[0054] Step 108: Determine the working mode of the vehicle thermal management system based on multiple temperature differences and preset thresholds, wherein the working mode includes a first mode and a second mode.

[0055] Step 110: In the first working mode, control the valve group to connect multiple target water pumps to their corresponding heat dissipation branches independently, and adjust the speed of multiple target water pumps to the target speed.

[0056] Step 112: In the second working mode, the control valve group connects at least two target water pumps in parallel to the target heat dissipation component and adjusts the speed of the at least two parallel target water pumps to the target speed.

[0057] Step 114: Obtain temperature feedback data from multiple heat dissipation components. Based on the temperature feedback data, the temperature range corresponding to the preset target temperature, and the target speed, adjust the speed of the water pump and the opening of the valve group so that the temperature feedback data falls within the temperature range corresponding to the preset target temperature.

[0058] In this application, heat dissipation components refer to core components in a vehicle's thermal management system that require temperature control, including controllers, drive motors, batteries, and hydraulic retarders. These components generate a large amount of heat during operation, and heat accumulation can lead to performance degradation or even failure. The first temperature data refers to the real-time temperature value of the heat dissipation components collected by temperature sensors. This data forms the basis for the system to determine the current thermal state of the heat dissipation components. Temperature sensors are installed at the inlet or outlet of the heat dissipation components to accurately reflect their actual temperature. The preset target temperature refers to the optimal operating temperature calibrated based on the performance parameters of the heat dissipation components. Different heat dissipation components have different preset target temperatures; for example, the preset target temperature for a motor is 65°C, and for a battery it is 30°C. This temperature is a key indicator for ensuring efficient and stable operation of the components. The temperature difference refers to the absolute value between the first temperature data and the preset target temperature. This is the core basis for the system to determine heat dissipation requirements. The larger the temperature difference, the higher the heat load on the heat dissipation components, and the greater the required coolant flow rate. The first mapping model refers to a mathematical model obtained by fitting a thermodynamic formula with bench tests. The thermodynamic formula is Q=m×c×ΔT, where Q is the flow rate, m is the mass of the coolant, c is the specific heat capacity of the coolant, and ΔT is the temperature difference. The function of the model is to establish the correspondence between the temperature difference and the target flow rate, so as to achieve accurate calculation of the flow rate requirement.

[0059] The target flow rate refers to the coolant flow rate that meets the current heat dissipation requirements of the heat dissipation components. Specifically, it is the coolant flow rate required for each heat dissipation branch and serves as the target basis for adjusting the pump speed and valve opening of the system.

[0060] A valve assembly refers to an integrated multi-way proportional valve assembly, which has at least two inlets and two outlets. The inlets are connected to the water pump in a one-to-one correspondence, and the outlets are connected to the heat dissipation branch or the target heat dissipation component in a corresponding correspondence. The valve assembly is the core component that enables flexible connection between the water pump and the heat dissipation branch.

[0061] The connectivity status refers to the connection method of the internal flow channels of the valve group, including two core statuses: single pump connected to a single branch and multiple pumps connected in parallel to a single target heat dissipation component. The connectivity status determines the flow path of the coolant. The target pump refers to the pump selected by the system to participate in operation based on the target flow rate and the connectivity status of the valve group. The number and combination of target pumps will be dynamically adjusted according to the heat dissipation requirements.

[0062] The target speed refers to the operating speed of the water pump calculated based on the target flow rate and the pump's speed-flow-head characteristic curve. It is a key parameter to ensure the water pump outputs the target flow rate, and different target flow rates correspond to different target speeds.

[0063] The first mode refers to the conventional heat dissipation mode, suitable for scenarios where the temperature difference between all heat dissipation components does not exceed a preset threshold. In the first mode, each water pump is independently connected to its corresponding heat dissipation branch, achieving differentiated temperature control across multiple branches. The second mode refers to the combined heat dissipation mode, suitable for scenarios where the temperature difference between any heat dissipation component exceeds a preset threshold. In the second mode, at least two water pumps are connected in parallel to the target heat dissipation component, achieving enhanced heat dissipation with a large flow rate. Temperature feedback data refers to the real-time temperature data of the heat dissipation components collected by the system during the adjustment of the water pumps and valve groups. This data is from the same source as the first temperature data and is used to determine whether the temperature of the heat dissipation component has reached the preset target temperature range. The temperature range corresponding to the preset target temperature refers to the temperature fluctuation range based on the preset target temperature. Within this temperature fluctuation range, the heat dissipation component can operate stably, serving as the endpoint judgment basis for the system's feedback adjustment.

[0064] This application solves the problems of poor adaptability, insufficient heat dissipation under high heat load, and low temperature control accuracy of single-pump thermal management systems by using a collaborative control architecture of multiple water pumps and valve groups, thereby achieving precise temperature control in complex scenarios with multiple branches.

[0065] In the execution of the method of this application, the first step is temperature acquisition and difference calculation. The system acquires the first temperature data of each heat dissipation component through temperature sensors, calculates the temperature difference in combination with the preset target temperature, and completes the preliminary determination of heat dissipation requirements. The second step is target flow rate calculation. Based on the first mapping model, the system converts the temperature difference into the target flow rate of each heat dissipation branch, establishing the correlation between temperature requirements and flow rate requirements. The third step is target pump and target speed determination. The system acquires the current connection status of the valve group, filters out the target pumps that need to participate in the operation in combination with the target flow rate, and calculates the target speed according to the pump speed-flow-head characteristic curve. The fourth step is working mode determination. The system compares the temperature difference with the preset threshold to determine the current working mode to be adopted. If all temperature differences do not exceed the threshold, the system enters the first mode; if any temperature difference exceeds the threshold, the system enters the second mode. The fifth step is mode execution. In the first mode, the system control valve group connects each target water pump to its corresponding heat dissipation branch independently and adjusts the pump speed to the target speed to achieve independent temperature control of multiple branches. In the second mode, the system control valve group connects at least two target water pumps in parallel to the target heat dissipation component and adjusts the speed of the parallel water pumps to the target speed, aggregating the flow output of multiple water pumps to form a large flow heat dissipation channel. The sixth step is closed-loop feedback regulation. The system collects the temperature feedback data of the heat dissipation component in real time, compares it with the temperature range corresponding to the preset target temperature, and dynamically adjusts the pump speed and valve group opening until the temperature feedback data falls into the range, thus completing precise temperature control.

[0066] The entire process forms a closed-loop control system encompassing temperature acquisition, demand determination, parameter calculation, mode execution, and feedback adjustment. Through the flexible connectivity of the valve group, it can meet the diverse conventional heat dissipation needs of multiple branches, as well as cope with the enhanced heat dissipation needs of a single component under high heat load, thereby improving the adaptability and control accuracy of the thermal management system.

[0067] In some embodiments of this application, the first mode is a conventional heat dissipation mode in which all temperature differences do not exceed a preset threshold; the second mode is a combined heat dissipation mode in which any temperature difference exceeds a preset threshold.

[0068] In this embodiment, the conventional heat dissipation mode refers to the operating mode when the temperature difference between all heat dissipation components does not exceed a preset threshold. The core objective of the system in the conventional heat dissipation mode is to maintain the temperature of each heat dissipation component stable near the preset target temperature, thereby achieving differentiated temperature control across multiple branches. The combined heat dissipation mode refers to the operating mode when the temperature difference between any heat dissipation component exceeds a preset threshold. The core objective of the system in the combined heat dissipation mode is to rapidly reduce the temperature of components with high heat loads, preventing components from overheating and degrading.

[0069] Based on the comparison between temperature differences and preset thresholds, this application determines that the current heat load is at a normal level when the system calculates that the temperature differences of all heat dissipation components do not exceed the preset threshold, triggering the first mode, i.e., the normal heat dissipation mode. In this mode, the system controls the valve group to independently connect each target water pump to its corresponding heat dissipation branch, with each pump providing precise flow to its corresponding branch to meet the differentiated heat dissipation needs of multiple branches. When the system calculates that the temperature difference of any heat dissipation component exceeds the preset threshold, it determines that the component is in a high heat load state, triggering the second mode, i.e., the combined heat dissipation mode. In this mode, the system controls the valve group to switch flow channels, connecting at least two target water pumps in parallel to the high heat load component, aggregating the flow output of multiple pumps to provide a coolant flow rate far exceeding that of a single pump, quickly removing the instantaneous high heat from the component.

[0070] The triggering conditions for the two modes are clear and explicit, enabling seamless switching of the thermal management system between conventional and enhanced heat dissipation scenarios, and ensuring the system's adaptability under different heat loads.

[0071] In one embodiment, when the temperature difference between the motor and the battery is 10°C and 8°C respectively, both below the preset threshold of 15°C, the system enters a normal cooling mode, with water pump 1 supplying power to the motor branch and water pump 2 supplying power to the battery branch. When the temperature difference between the motor and the battery reaches 18°C, exceeding the preset threshold of 15°C, the system switches to a combined cooling mode, with water pumps 1 and 2 connected in parallel to supply power to the motor branch, increasing the coolant flow rate.

[0072] In some embodiments of this application, the vehicle thermal management system control method further includes: acquiring the operating parameters of the water pump and the status parameters of the valve group according to a preset cycle, wherein the operating parameters of the water pump include speed, current and voltage, and the status parameters of the valve group include opening degree and operating current.

[0073] In this embodiment, the preset period refers to a fixed time interval for the system to monitor the pump operating parameters and valve group status parameters. The preset period setting needs to balance the real-time nature of the monitoring and the system's energy consumption, and is usually calibrated based on the thermal response characteristics of the heat dissipation components. Pump operating parameters are key indicators reflecting the pump's working status, including speed, current, and voltage. Speed ​​directly determines the pump's flow output, while current and voltage reflect the pump's operating conditions. Abnormal parameters indicate a possible pump malfunction. Valve group status parameters are key indicators reflecting the valve group's working status, including opening degree and operating current. Valve opening degree determines the flow capacity of the channel, while operating current reflects the valve group's driving state. Abnormal parameters indicate a possible valve group malfunction such as jamming.

[0074] In this embodiment, the system continuously collects the pump's speed, current, and voltage parameters, as well as the valve assembly's opening degree and operating current parameters, according to a preset cycle. These parameters are used as the basis for judging the equipment's operating status and are transmitted in real time to the data processing module for analysis. Through continuous monitoring, the system can promptly detect early anomalies in the pump and valve assembly, preventing the fault from escalating and laying a data foundation for subsequent fault handling. Example: The system is set to a preset cycle of 100ms, collecting the pump's speed, current, and voltage, as well as the valve assembly's opening degree and operating current, every 100ms to ensure timely capture of equipment status changes.

[0075] In some embodiments of this application, after obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: when an abnormal speed or overcurrent is detected in the operating parameters of the water pump, determining that the operating state of the water pump is a fault state; when the operating state is a fault state, controlling the valve group to cut off the channel of the water pump with the fault state, and redistributing the flow share of the target flow according to the rated power ratio of the remaining water pumps.

[0076] In this embodiment, a fault state refers to the operating state of the water pump with abnormal speed or excessive current. Abnormal speed includes speed higher or lower than the target speed, and excessive current refers to current exceeding the rated current of the water pump. Under fault conditions, the water pump cannot output the target flow rate normally. The rated power ratio refers to the ratio of the rated power of each normal water pump to the sum of the rated power of all normal water pumps, which is the basis for the system to redistribute the flow share.

[0077] This application describes a system that, upon detecting abnormal pump speed or excessive current, first determines that the pump is in a faulty state. Then, it immediately controls the valve group to cut off the flow of the faulty pump to prevent it from affecting the operation of the entire system. Next, the system redistributes the target flow share according to the rated power ratio of the remaining normal pumps. Then, it calculates the target speed of each normal pump based on the new flow share and adjusts the speed of the normal pumps to the new target speed to ensure that the total flow meets the heat dissipation requirements.

[0078] In one embodiment, if pump 1 in the three-pump system fails, the system cuts off the channel to pump 1. The remaining pumps 2 and 3 have the same rated power, and each has a rated power ratio of 50%. The system distributes the target flow share equally to pumps 2 and 3, and adjusts the speed of the two pumps to ensure that the total flow remains unchanged.

[0079] In some embodiments of this application, after obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: when the status parameters of the valve group are detected to exceed the preset range, determining that the working state of the valve group is a fault state, triggering an alarm signal and controlling the valve group to switch to a preset emergency flow channel.

[0080] In this embodiment, a valve assembly malfunction refers to an operating state where the valve assembly's state parameters exceed a preset range. This includes situations such as the valve assembly opening being unable to be adjusted or abnormal operating current. Under malfunction conditions, the valve assembly cannot achieve normal flow channel switching. An alarm signal is a notification signal issued by the system after detecting a valve assembly malfunction, used to remind operators to handle the malfunction promptly.

[0081] Pre-set emergency flow channels refer to backup flow channels pre-installed inside the valve assembly, used to maintain basic heat dissipation function and prevent heat dissipation components from overheating when the valve assembly fails.

[0082] This application describes a system that, upon detecting that the valve group's status parameters exceed a preset range, determines that the valve group is in a faulty state and immediately triggers an alarm signal. Simultaneously, it controls the valve group to switch to a preset emergency flow channel. The emergency flow channel enables basic communication between the water pump and the core heat dissipation components, ensuring that the core components receive a minimum supply of coolant, maintaining basic heat dissipation functions, and preventing components from failing due to temperature runaway.

[0083] In one embodiment, when the valve assembly becomes stuck and cannot switch the flow path, the system triggers an alarm signal and simultaneously controls the valve assembly to switch to the emergency flow path, so that water pump 1 and the motor branch, and water pump 2 and the battery branch are basically connected, ensuring the basic heat dissipation requirements of the motor and battery.

[0084] In some embodiments of this application, when the temperature feedback data is within the temperature range corresponding to the preset target temperature, the pump speed and valve opening are adjusted based on the energy consumption optimization algorithm so that the temperature feedback data falls within the temperature range corresponding to the preset target temperature.

[0085] In this embodiment, the energy consumption optimization algorithm refers to an algorithm used to optimize the pump speed and valve opening. The core objective of this algorithm is to ensure that the pump and valve operate within the lowest energy consumption range while maintaining the stable temperature of the heat dissipation components. Fine-tuning refers to making small adjustments to the pump speed and valve opening after the temperature feedback data falls within the preset target temperature range. The adjustment range is such that it does not affect temperature stability.

[0086] This application proposes that after the temperature feedback data falls within the temperature range corresponding to the preset target temperature, the system activates an energy consumption optimization algorithm. The algorithm will fine-tune the pump speed and valve opening based on the pump's high-efficiency operating range and the valve group's low flow resistance characteristics. While maintaining temperature stability, it will minimize the pump's operating speed and valve group's flow resistance loss, thereby reducing the system's total power consumption.

[0087] In one embodiment, once the motor temperature stabilizes within the range of 65℃±2℃, the system activates an energy consumption optimization algorithm to fine-tune the pump speed from 2000r / min to 1800r / min, while simultaneously fine-tuning the valve opening from 80% to 75%, thereby reducing system power consumption while maintaining temperature stability.

[0088] In some embodiments of this application, the preset threshold is 15°C, and the temperature range corresponding to the preset target temperature is the preset target temperature ±2°C.

[0089] In this embodiment, the preset threshold of 15°C is the critical value for determining whether the heat dissipation component is under high heat load. When the temperature difference exceeds 15°C, it is determined that the component needs to strengthen heat dissipation.

[0090] The preset target temperature range of ±2℃ refers to the allowable temperature fluctuation range of the heat dissipation component. That is, when the actual temperature of the heat dissipation component fluctuates within ±2℃ of the preset target temperature, the component is considered to be in a stable working state.

[0091] This application uses 15℃ as the critical threshold for mode switching and ±2℃ as the temperature stability judgment range. In actual operation, the system makes control decisions based on these two parameters. When the temperature difference is ≤15℃, the system maintains the conventional heat dissipation mode. When the temperature difference is >15℃, the system switches to the combined heat dissipation mode. During the feedback adjustment process, the system uses whether the temperature feedback data falls within the ±2℃ range as the adjustment endpoint to ensure the temperature control accuracy of the heat dissipation components.

[0092] In one embodiment, the preset target temperature of the battery is 30°C, corresponding to a temperature range of 28°C-32°C. When the battery temperature difference is 10°C, the system maintains the normal mode. When the temperature difference reaches 16°C, the system switches to the combined mode. After feedback adjustment, the battery temperature is stabilized within the range of 30°C±2°C, ensuring the efficient operation of the battery.

[0093] like Figure 2 As shown, Figure 2This diagram illustrates the principle of a multi-pump coordinated control method for a vehicle's thermal management system. The components and connections shown include a radiator, instrument cluster, controller, electronic control unit, T1, water pump 1, motor, water pump 2, T2, valve assembly, water pump 3, battery, T3, water pump 4, hydraulic retarder, T4, water pump n, water circuit, and electrical circuit. This embodiment is applied to a multi-branch water-cooled thermal management system for a pure electric wide-body vehicle. The system includes control and auxiliary components such as a radiator, instrument cluster, controller, and electronic control unit. It is equipped with multiple permanent magnet synchronous water pumps, numbered from water pump 1, water pump 2, water pump 3, water pump 4 up to water pump n. Each water pump is connected to different heat dissipation components such as the motor, battery, and hydraulic retarder via an integrated multi-port proportional valve assembly. A temperature sensor T is correspondingly installed on the motor. 2. Temperature sensor T3 is installed for the battery, temperature sensor T4 for the hydraulic retarder, and temperature sensor T1 for the electronic control unit. Each temperature sensor is installed at the inlet or outlet of the corresponding heat dissipation component, employing a high-precision thermistor sensor with a sampling frequency of 10Hz. Coolant circulation is achieved between components via a water circuit, and control signals and data are transmitted and interacted through circuitry. During operation, the temperature acquisition module collects real-time temperature data through temperature sensors T1-T4 and other corresponding heat dissipation components, transmitting it to the data processing module, which is the core of the system. The data processing module calculates the temperature difference based on the preset target temperature, determines the target flow rate based on the temperature-flow mapping model, and adjusts... The target speed of each pump is determined by taking the pump speed-flow-head characteristic curve. Then, commands are output to the valve group control module and the pump drive module. In normal cooling mode, the valve group controls pump 1 to be independently connected to the electrical control branch, pump 2 to the motor branch, pump 3 to the battery branch, and pump 4 to the hydraulic retarder branch. Each pump runs to its target speed to meet the cooling requirements of its individual branch. In combined cooling mode, for example, when the temperature difference between the motor and pumps exceeds a preset threshold of 15°C, the valve group controls pumps 2 and 3 to be connected in parallel to the motor branch, distributing the flow rate in a 1:1 ratio according to their rated power. The two pumps work together to provide a large flow of coolant, quickly removing the instantaneous high heat from the motor. The feedback adjustment module collects temperature feedback data of each heat dissipation component, water pump operating parameters, and valve group status parameters in real time. If the temperature is not stable within the preset target temperature range of ±2℃, the data processing module dynamically corrects the water pump speed and valve group opening until the temperature stabilizes. After stabilization, the energy consumption optimization algorithm is activated to fine-tune parameters and reduce the total power consumption of the system. The fault diagnosis module monitors the water pump speed, current, and voltage parameters, as well as the valve group opening and operating current parameters in real time. When a water pump fault is detected, the valve group cuts off the faulty water pump channel and redistributes the flow share of the remaining water pumps. When a valve group jamming fault is detected, the system triggers an alarm and switches to the preset emergency flow channel to maintain the basic heat dissipation function of each heat dissipation component and ensure reliable system operation.

[0094] like Figure 3As shown, an embodiment of this application provides a vehicle thermal management system control device 200. The device is used in a vehicle thermal management system, which includes multiple heat dissipation components, multiple water pumps, and valve assemblies. The device includes a first acquisition module 210, a first execution module 220, a second execution module 230, a third execution module 240, a fourth execution module 250, a fifth execution module 260, and a sixth execution module 270. The first acquisition module 210 acquires first temperature data and a preset target temperature for each of the multiple heat dissipation components, and determines multiple temperature differences based on the multiple first temperature data and the preset target temperature. The first execution module 220 determines the target flow rate corresponding to each heat dissipation branch based on a preset first mapping model and the multiple temperature differences. The first mapping model maps the correspondence between temperature and flow rate. The second execution module 230 acquires the connection status of the valve assemblies and determines the target flow rate based on the target flow rate and the connection status. The target speed of the target water pumps participating in the operation among multiple water pumps; the third execution module 240 is used to determine the working mode of the vehicle thermal management system based on multiple temperature differences and preset thresholds, wherein the working mode includes a first mode and a second mode; the fourth execution module 250 is used to control the valve group to independently connect multiple target water pumps with their corresponding heat dissipation branches in the first working mode, and adjust the speed of multiple target water pumps to the target speed; the fifth execution module 260 is used to control the valve group to connect at least two target water pumps in parallel to the target heat dissipation components in the second working mode, and adjust the speed of at least two parallel target water pumps to the target speed; the sixth execution module 270 is used to acquire temperature feedback data of multiple heat dissipation components, and adjust the speed of the water pumps and the opening of the valve group according to the temperature feedback data, the temperature range corresponding to the preset target temperature and the target speed, so that the temperature feedback data falls into the temperature range corresponding to the preset target temperature.

[0095] The vehicle thermal management system control device 200 provided in this application achieves fully automated control of the entire process from temperature data acquisition, temperature difference calculation, target flow determination, target water pump and target speed screening, working mode determination and execution to closed-loop feedback adjustment through the coordinated work of the first acquisition module 210, the first execution module 220, the second execution module 230, the third execution module 240, the fourth execution module 250, the fifth execution module 260 and the sixth execution module 270. In the first mode, it can independently connect each target water pump and its corresponding heat dissipation branch through the control valve group to meet the different conventional heat dissipation needs of multiple branches. In the second mode, it can connect at least two target water pumps in parallel to the target heat dissipation component to provide high flow enhanced heat dissipation to cope with high heat load scenarios. At the same time, it dynamically adjusts the water pump speed and valve group opening based on temperature feedback data to ensure that the temperature of the heat dissipation component is stable within the preset range. It effectively solves the problems of poor adaptability, insufficient heat dissipation under high heat load and low temperature control accuracy of the existing single water pump thermal management system, and improves the overall heat dissipation efficiency and reliability of the system.

[0096] like Figure 4 As shown, an embodiment of this application provides a vehicle thermal management system control device 300, including a processor 302 and a memory 304. The memory 304 stores programs or instructions. When the processor 302 executes the programs or instructions in the memory 304, it implements the steps of the vehicle thermal management system control method as described in any of the above embodiments. Therefore, the vehicle thermal management system control device 300 possesses all the beneficial effects of the vehicle thermal management system control method as described in any of the above embodiments.

[0097] The embodiments of this application provide a readable storage medium on which a program or instructions are stored. When executed by a processor, the program or instructions implement the steps of the vehicle thermal management system control method as described in any of the above embodiments. Therefore, the readable storage medium possesses all the beneficial effects of the vehicle thermal management system control method as described in any of the above embodiments.

[0098] In this application, a temperature-flow mapping model is constructed based on the fundamental thermodynamic formula Q=m×c×ΔT in a multi-pump collaborative control scheme. Here, Q is the target coolant flow rate, which is the coolant flow volume required to meet the current heat dissipation needs of the heat dissipation components; m is the coolant mass; c is the specific heat capacity of the coolant; and ΔT is the temperature difference (ΔT=|T). n -T on |,T n T is the real-time temperature data of the heat dissipation component collected by the temperature sensor. on To obtain the target flow rate Q under conventional heat dissipation mode (based on the preset target temperature calibrated according to the performance parameters of the heat dissipation component), the temperature difference formula is combined with bench test fitting. n The calculation formula for Q n =f(ΔT n This enables precise conversion of temperature difference values ​​into the standard target flow rate of a single branch, where ΔT n This represents the temperature difference of the nth heat dissipation component / branch under high heat load conditions. When any heat dissipation component triggers the combined heat dissipation mode under high heat load conditions, the flow coefficient k is calibrated based on the core logic of the above formula, and the calculation formula for the total target flow rate Q_total of the combined heat dissipation is obtained: Q_total = k × ΔT n The calibration of k is performed based on the heat dissipation area of ​​the heat dissipation components and the characteristics of the coolant itself. This determines the total flow requirement when multiple pumps are connected in parallel. Then, the flow distribution is completed by combining the rated power ratio of each pump. This is used to calculate the target speed ω by retrieving the pump speed-flow-head characteristic curve. n It provides accurate flow parameters, and the entire formula system runs through the core process from temperature acquisition to flow determination, realizing the scientific transformation of temperature requirements into flow requirements.

[0099] In the claims, description, and accompanying drawings of this invention, the term "plural" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the descriptive process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limiting the invention. The terms "connected," "installed," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood based on the specific circumstances described above.

[0100] In the claims, description, and accompanying drawings of this invention, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In the claims, description, and accompanying drawings of this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0101] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A control method for a vehicle thermal management system, characterized in that, The method is used in a vehicle thermal management system, the vehicle thermal management system including: multiple heat dissipation components, multiple water pumps and valve assemblies, the method including: Acquire first temperature data and a preset target temperature for each of the multiple heat dissipation components, and determine multiple temperature differences based on the multiple first temperature data and the preset target temperature; The target flow rate for each heat dissipation branch is determined based on the preset first mapping model and the multiple temperature difference values. The first mapping model is used to map the correspondence between temperature and flow rate. The connection status of the valve group is obtained, and the target speed of the target water pump participating in the operation among the multiple water pumps is determined based on the target flow rate and the connection status. The operating mode of the vehicle thermal management system is determined based on the multiple temperature differences and preset thresholds, wherein the operating mode includes a first mode and a second mode. In the first working mode, the valve group is controlled to independently connect the multiple target water pumps to the corresponding heat dissipation branches, and the speed of the multiple target water pumps is adjusted to the target speed. In the second working mode, the valve group is controlled to connect at least two target water pumps in parallel to the target heat dissipation component, and the speed of the at least two parallel target water pumps is adjusted to the target speed. Acquire temperature feedback data from multiple heat dissipation components, and adjust the speed of the water pump and the opening of the valve group according to the temperature feedback data, the temperature range corresponding to the preset target temperature and the target speed, so that the temperature feedback data falls into the temperature range corresponding to the preset target temperature. According to a preset cycle, the operating parameters of the water pump and the status parameters of the valve group are acquired. The operating parameters of the water pump include speed, current and voltage, and the status parameters of the valve group include opening degree and operating current. After obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: When an abnormal speed or excessive current is detected in the operating parameters of the water pump, the operating status of the water pump is determined to be a fault state. When the operating state is faulty, the control valve group cuts off the channel of the water pump with the faulty state, and redistributes the flow share of the target flow according to the rated power ratio of the remaining water pumps. After obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: When the status parameters of the valve group are detected to exceed the preset range, the working state of the valve group is determined to be a fault state, an alarm signal is triggered, and the valve group is controlled to switch to the preset emergency flow channel.

2. The vehicle thermal management system control method according to claim 1, characterized in that, The first mode is the normal heat dissipation mode in which all the temperature differences do not exceed the preset threshold; The second mode is a combined heat dissipation mode in which any of the temperature differences exceeds the preset threshold.

3. The vehicle thermal management system control method according to claim 1, characterized in that, When the temperature feedback data is within the temperature range corresponding to the preset target temperature, the pump speed and valve opening are adjusted based on the energy consumption optimization algorithm so that the temperature feedback data falls within the temperature range corresponding to the preset target temperature.

4. The vehicle thermal management system control method according to claim 1, characterized in that, The preset threshold is 15℃, and the temperature range corresponding to the preset target temperature is the preset target temperature ±2℃.

5. A vehicle thermal management system control device, characterized in that, The device is used in a vehicle thermal management system, which includes: multiple heat dissipation components, multiple water pumps, and valve assemblies. The device includes: The first acquisition module is used to acquire first temperature data and a preset target temperature for each of the plurality of heat dissipation components, and to determine a plurality of temperature differences based on the plurality of first temperature data and the preset target temperature. The first execution module is used to determine the target flow rate corresponding to each heat dissipation branch according to the preset first mapping model and the multiple temperature difference values. The first mapping model is used to map the correspondence between temperature and flow rate. The second execution module is used to obtain the connection status of the valve group and determine the target speed of the target water pump participating in the operation among the multiple water pumps based on the target flow rate and the connection status. The third execution module is used to determine the working mode of the vehicle thermal management system based on the multiple temperature differences and a preset threshold, wherein the working mode includes a first mode and a second mode. The fourth execution module is used to control the valve group so that the multiple target water pumps are independently connected to the corresponding heat dissipation branches when the working mode is the first mode, and to adjust the speed of the multiple target water pumps to the target speed. The fifth execution module is used to control the valve group to connect at least two target water pumps in parallel to the target heat dissipation component when the working mode is the second mode, and to adjust the speed of the at least two parallel target water pumps to the target speed. The sixth execution module is used to acquire temperature feedback data of multiple heat dissipation components, and adjust the speed of the water pump and the opening of the valve group according to the temperature feedback data, the temperature range corresponding to the preset target temperature and the target speed, so that the temperature feedback data falls into the temperature range corresponding to the preset target temperature. According to a preset cycle, the operating parameters of the water pump and the status parameters of the valve group are acquired. The operating parameters of the water pump include speed, current and voltage, and the status parameters of the valve group include opening degree and operating current. After obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: When an abnormal speed or excessive current is detected in the operating parameters of the water pump, the operating status of the water pump is determined to be a fault state. When the operating state is faulty, the control valve group cuts off the channel of the water pump with the faulty state, and redistributes the flow share of the target flow according to the rated power ratio of the remaining water pumps. After obtaining the operating parameters of the water pump and the status parameters of the valve group, the method further includes: When the status parameters of the valve group are detected to exceed the preset range, the working state of the valve group is determined to be a fault state, an alarm signal is triggered, and the valve group is controlled to switch to the preset emergency flow channel.

6. A vehicle thermal management system control device, characterized in that, include: processor; A memory storing programs or instructions, wherein the processor, when executing the programs or instructions in the memory, implements the steps of the vehicle thermal management system control method as described in any one of claims 1 to 4.

7. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the vehicle thermal management system control method as described in any one of claims 1 to 4.

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