Vehicle low-voltage auxiliary power supply equipment protection method and related device

Abstract

The present invention discloses a protection method and related device for a vehicle low-voltage auxiliary power supply device, which relates to the technical field of protection of low-voltage auxiliary power supply devices. The method includes: obtaining historical abnormal data of the vehicle low-voltage auxiliary power supply device, determining a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data, obtaining current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device, and determining corresponding first optimization factors, second optimization factors, and third optimization factors, respectively optimizing the first current threshold, the first voltage threshold, and the first temperature threshold based on multiple optimization factors to obtain a second current threshold, a second voltage threshold, and a second temperature threshold, and controlling an intelligent fuse to operate based on the second current threshold, the second voltage threshold, and the second temperature threshold. By adopting the implementation manner of the present application, the safety of the vehicle low-voltage auxiliary power supply device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage auxiliary power supply equipment protection, and particularly relates to a protection method and related device for a vehicle low-voltage auxiliary power supply equipment. Background Art

[0002] In the complex electrical architecture of modern vehicles, the vehicle low-voltage auxiliary power supply equipment plays a crucial role. It provides stable and reliable power supply for numerous low-voltage electrical devices in the vehicle, such as lighting systems, in-vehicle entertainment devices, various sensors, and electronic control systems. As the core component of the vehicle low-voltage auxiliary power supply equipment protection system, the performance and application of intelligent fuses are of great significance for ensuring the safe and stable operation of the entire electrical system. Traditional fuses mainly work based on the simple overcurrent fusing principle. When the current in the circuit exceeds its rated value to a certain extent, the fuse element melts, thus cutting off the circuit and playing a protective role. However, the protection performance of traditional fuses is not high, resulting in low safety of the vehicle low-voltage auxiliary power supply equipment. Therefore, how to improve the safety of the vehicle low-voltage auxiliary power supply equipment is an urgent problem to be solved. Summary of the Invention

[0003] The embodiments of the present application provide a protection method and related device for a vehicle low-voltage auxiliary power supply equipment, which improve the safety of the vehicle low-voltage auxiliary power supply equipment.

[0004] In a first aspect, the embodiments of the present application provide a protection method for a vehicle low-voltage auxiliary power supply equipment, which is applied to a vehicle low-voltage auxiliary power supply equipment protection system. The vehicle low-voltage auxiliary power supply equipment protection system includes an intelligent fuse and a vehicle low-voltage auxiliary power supply equipment. The method includes:

[0005] Obtain historical abnormal data of the vehicle low-voltage auxiliary power supply equipment in a preset historical time period;

[0006] Determine a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply equipment based on the historical abnormal data;

[0007] Obtain current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply equipment in the preset historical time period;

[0008] Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data;

[0009] Optimize the first current threshold based on the first optimization factor to obtain a second current threshold;

[0010] Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold;

[0011] Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold;

[0012] Control the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold.

[0013] In a second aspect, an embodiment of the present application provides a protection device for a vehicle low-voltage auxiliary power supply device, which is applied to a vehicle low-voltage auxiliary power supply device protection system. The vehicle low-voltage auxiliary power supply device protection system includes an intelligent fuse and a vehicle low-voltage auxiliary power supply device. The device includes: an acquisition unit and a processing unit;

[0014] The acquisition unit is configured to acquire historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period;

[0015] The processing unit is configured to determine a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data;

[0016] Acquire current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period;

[0017] Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data;

[0018] Optimize the first current threshold based on the first optimization factor to obtain a second current threshold;

[0019] Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold;

[0020] Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold;

[0021] Control the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold.

[0022] In a third aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory, a communication interface, and one or more programs, where one or more programs are stored in the memory and are configured to be executed by the processor so that the electronic device executes the method according to the first aspect.

[0023] Fourthly, an embodiment of the present application provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the method according to the first aspect.

[0024] Fifthly, an embodiment of the present application provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, such that a computer executes the method according to the first aspect.

[0025] Implementing the embodiments of the present application has the following beneficial effects:

[0026] It can be seen that the method for protecting a vehicle low-voltage auxiliary power supply device described in the embodiments of the present application is applied to a vehicle low-voltage auxiliary power supply device protection system, which includes an intelligent fuse and a vehicle low-voltage auxiliary power supply device. First, historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period is obtained, and then based on the historical abnormal data, a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device are determined. Next, current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period are obtained, and then a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data are determined. Then, based on the first optimization factor, the first current threshold is optimized to obtain a second current threshold, and based on the second optimization factor, the first voltage threshold is optimized to obtain a second voltage threshold, and based on the third optimization factor, the first temperature threshold is optimized to obtain a second temperature threshold. Finally, based on the second current threshold, the second voltage threshold, and the second temperature threshold, the intelligent fuse is controlled to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device, improving the safety of the vehicle low-voltage auxiliary power supply device. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings required to be used in the embodiments of the present application or the background art will be described below.

[0028] Figure 1 is a schematic structural diagram of a vehicle low-voltage auxiliary power supply device protection system provided by an embodiment of the present application;

[0029] Figure 2 is a flowchart of a method for protecting a vehicle low-voltage auxiliary power supply device provided by an embodiment of the present application;

[0030] Figure 3 is a flowchart of determining a load balance degree provided by an embodiment of the present application;

[0031] Figure 4 is an example diagram of a parallel load branch provided by an embodiment of the present application;

[0032] Figure 5 is a flowchart of restoring power supply to a vehicle low-voltage auxiliary power supply device provided by an embodiment of the present application;

[0033] Figure 6 is a flowchart of determining a stability degree value provided by an embodiment of the present application;

[0034] Figure 7 is a schematic structural diagram of a protection device for a vehicle low-voltage auxiliary power supply device provided by an embodiment of the application;

[0035] Figure 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Specific Embodiments

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0037] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0038] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] First, the relevant terms involved in the present application are explained:

[0040] Vehicle Low-Voltage Auxiliary Power Supply Equipment: It is a system that provides power support for various low-voltage electrical equipment on the vehicle. It is mainly responsible for providing electrical energy stably to the non-critical or auxiliary equipment of the vehicle when the main power supply of the vehicle (such as the generator driven by the engine or the main battery) fails, during the startup phase, or under specific working conditions, so as to ensure the normal operation of these equipment and enhance the reliability and stability of the vehicle electrical system. The vehicle low-voltage auxiliary power supply equipment mainly consists of a low-voltage battery, a charging system, a power management module, a power distribution circuit, etc. The low-voltage battery is one of the core components of the low-voltage auxiliary power supply equipment. It is usually a lead-acid battery or a lithium-ion battery and is used to store electrical energy. When the vehicle starts, it provides current for the starter motor. At the same time, during the vehicle operation, it supplies power to the vehicle's low-voltage electrical equipment such as headlights, audio systems, in-vehicle computers, etc. When the main power supply system of the vehicle fails, the low-voltage battery can maintain the operation of the vehicle's basic electrical equipment for a period of time so that the driver can take corresponding measures. The charging system includes the low-voltage charging circuit of the alternator or the on-vehicle charger, etc. Its function is to convert the mechanical energy of the engine into electrical energy during the vehicle operation to charge the low-voltage battery, ensuring that the battery always maintains a sufficient charge. At the same time, the charging system can also control and regulate the charging process to prevent overcharging or undercharging from damaging the battery. The power management module is responsible for monitoring and managing the working state of the entire low-voltage power supply system. It real-time monitors parameters such as the voltage, current, and temperature of the low-voltage battery through sensors, as well as the load situation of the vehicle electrical system. According to the preset algorithms and strategies, it controls and regulates the charging system, power distribution circuit, etc. to achieve reasonable distribution and utilization of electrical energy and improve the efficiency and reliability of the power supply system. The power distribution circuit distributes the electrical energy generated by the low-voltage auxiliary power supply equipment to each low-voltage electrical equipment of the vehicle. It usually consists of various relays, fuses, wire harnesses, etc. It can reasonably distribute electrical energy according to the power requirements and working states of different equipment and protect the circuit. When the vehicle is running normally, the engine drives the alternator to rotate. The alternator generates alternating current, which after rectification and voltage stabilization, on the one hand, directly supplies power to the vehicle's low-voltage electrical equipment, and on the other hand, charges the low-voltage battery. At this time, the power management module will adjust the charging current and power distribution in real-time according to the battery charge state and the load situation of the electrical equipment to ensure the stable operation of the system. When the engine stops running or the main power supply system fails, the low-voltage battery becomes the only power source for the vehicle's low-voltage electrical equipment. The low-voltage battery supplies power to each equipment through the power distribution circuit to maintain the basic functions of the vehicle, such as interior lighting, door lock control, emergency alarm, etc. At the same time, the power management module will enter the energy-saving mode, reducing the power of some non-essential equipment or cutting off its power supply to extend the service life of the low-voltage battery.

[0041] Please refer to Figure 1 , Figure 1It is a schematic structural diagram of a protection system for a vehicle low-voltage auxiliary power supply device provided by an embodiment of the present application. The vehicle low-voltage auxiliary power supply device protection system 100 includes an intelligent fuse 101 and a vehicle low-voltage auxiliary power supply device 102.

[0042] In this embodiment, the vehicle low-voltage auxiliary power supply device protection system 100 is a system for protecting the vehicle low-voltage auxiliary power supply device 102. Its function is to monitor and manage the operating state of the vehicle low-voltage auxiliary power supply device 102. When abnormal situations (such as overcurrent, overvoltage, overheating, etc.) occur, protection measures are taken in a timely manner to prevent equipment damage and ensure the safe and stable operation of the vehicle low-voltage electrical system. The intelligent fuse 101 is a circuit protection device with intelligent functions. Compared with traditional fuses, it can not only cut off the circuit when the circuit is overloaded or short-circuited to play a protective role, but also has some additional intelligent features. For example, it can monitor the current situation in the circuit in real time. When the current exceeds the set threshold, it can quickly respond and cut off the circuit. At the same time, it may also have fault diagnosis and alarm functions, and can even communicate with other electronic systems of the vehicle to transmit fault information to the vehicle's central control unit or driver for timely measures. The vehicle low-voltage auxiliary power supply device 102 is a system in the vehicle that provides power support for various low-voltage electrical devices. When the main power supply of the vehicle fails, during the start-up stage or under specific working conditions, it stably provides electrical energy for the non-critical or auxiliary devices of the vehicle to ensure that these devices can work normally and enhance the reliability and stability of the vehicle electrical system. When the vehicle is running normally, the engine drives the alternator to rotate. The alternator generates alternating current, which is rectified and regulated. On the one hand, it directly supplies power to the low-voltage electrical devices of the vehicle, and on the other hand, it charges the low-voltage battery. At this time, the power management module will adjust the charging current and power distribution in real time according to the power state of the low-voltage battery and the load conditions of the electrical devices to ensure the stable operation of the system. When the engine stops running or the main power supply system fails, the low-voltage battery becomes the only power source for the vehicle low-voltage electrical devices. The low-voltage battery supplies power to each device through the power distribution circuit to maintain the basic functions of the vehicle, such as in-vehicle lighting, door lock control, emergency alarm, etc. At the same time, the power management module will enter the energy-saving mode to reduce the power of some non-essential devices or cut off their power to extend the use time of the low-voltage battery.

[0043] Please refer to Figure 2 , Figure 2 It is a flowchart of a method for protecting a vehicle low-voltage auxiliary power supply device provided by an embodiment of the present application, including but not limited to the following steps:

[0044] S201: Obtain the historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period.

[0045] In this embodiment, data generated when the vehicle's low-voltage auxiliary power supply device has an abnormal situation within a preset historical time range in the past, that is, within the preset historical time period, is collected from the vehicle's relevant data recording system. These abnormal data may include various data information in the case of equipment failure, abnormal performance, or operating parameters exceeding the normal range, such as abnormal values of parameters such as current, voltage, and temperature, as well as related fault codes, timestamps, and other information.

[0046] S202: Determine a first current threshold, a first voltage threshold, and a first temperature threshold for the vehicle's low-voltage auxiliary power supply device based on the historical abnormal data.

[0047] In this embodiment, exemplarily, based on the historical abnormal data, n abnormal times are determined, as well as n current values, n voltage values, and n temperature values corresponding to the n abnormal times, where n is an integer greater than 1. Specifically, the abnormal times of the vehicle's low-voltage auxiliary power supply device within the preset historical time period are determined to obtain n abnormal times, and then the current, voltage, and temperature corresponding to each of the n abnormal times of the vehicle's low-voltage auxiliary power supply device are determined to obtain n current values, n voltage values, and n temperature values.

[0048] Exemplarily, the average value of the n current values is determined to obtain the average current value. Specifically, the current values corresponding to the n previously extracted abnormal times are added together and then divided by n to obtain the average current value. This average value can represent the overall level of the current of the device under abnormal conditions to a certain extent.

[0049] Exemplarily, the line resistance of the vehicle's low-voltage auxiliary power supply device is obtained. Specifically, since the line resistance affects the magnitude of the current when the vehicle's low-voltage auxiliary power supply device is working normally, and thus affects the determination of the current threshold, the greater the line resistance, the smaller the change in current under the same voltage change. Therefore, when determining the current threshold, the influence of the line resistance needs to be considered, so first, the line resistance of the vehicle's low-voltage auxiliary power supply device needs to be obtained.

[0050] Exemplarily, a first fine-tuning parameter corresponding to the line resistance is determined. Specifically, it can be a preset mapping relationship between the line resistance and the fine-tuning parameter, and based on this mapping relationship, the first fine-tuning parameter corresponding to the line resistance can be determined.

[0051] Exemplarily, the average current value is adjusted based on the first fine-tuning parameter to obtain the first current threshold. Specifically, the first current threshold is calculated according to the following formula:

[0052] First current threshold = average current value × (1 + first fine-tuning parameter);

[0053] Based on the above formula, the average current can be adjusted according to the first fine-tuning parameter to obtain the first current threshold.

[0054] Exemplarily, the average value of the n voltage values is determined to obtain the average voltage. Specifically, the voltage values corresponding to the n abnormal moments extracted previously are added up and then divided by n, so as to obtain the average voltage. This average value can represent the overall voltage level of the device under abnormal conditions to a certain extent.

[0055] Exemplarily, the load balance degree of the vehicle low-voltage auxiliary power supply device is determined. Specifically, please refer to Figure 3 , Figure 3 which is a flowchart for determining the load balance degree provided by an embodiment of the present application, including but not limited to the following steps:

[0056] S301: Determine m parallel load branches corresponding to the vehicle low-voltage auxiliary power supply device.

[0057] In this embodiment, m is an integer greater than 1.

[0058] The vehicle low-voltage auxiliary power supply device usually connects multiple loads, and these loads are connected in parallel in the circuit. Please refer to Figure 4 , Figure 4 which is an example diagram of a parallel load branch provided by an embodiment of the present application. In Figure 4 , taking the first load 1 and the second load 2 as examples, the voltages at both ends of the first load 1 and the second load 2 are equal and both equal to the voltage of the vehicle low-voltage auxiliary power supply. The first load 1 and the second load 2 can work independently without interference. In actual operation, there are more parallel load branches. In this embodiment, the branches where the first load 1 and the second load 2 are located are taken as examples for illustration. It should be explained that the total current is equal to the sum of the branch currents, and the current in each branch only depends on the resistance (or impedance) of that branch and the voltage of the vehicle low-voltage auxiliary power supply, and they do not affect each other. That is to say, when the load of a certain branch changes (such as increasing or decreasing the resistance), only the current of that branch will change, and the current of other branches will not be affected. When a certain branch has an open circuit fault, the other branches can still work normally, and the entire circuit will not be completely paralyzed. However, if a certain branch has a short circuit fault, it will cause the current of the entire circuit to be too large, which may damage the power supply or other components.

[0059] S302: Obtain the voltage drop corresponding to each of the m parallel load branches to obtain m voltage drops.

[0060] In this embodiment, in a parallel circuit, the voltage drops across the two ends of each load branch are different, which depends on factors such as the resistance of the load in that branch. Obtain the voltage drop corresponding to each parallel load branch, and thus m voltage drop data are obtained. These data reflect the voltage change conditions of each load branch during operation and are an important basis for subsequent analysis of the load balance degree.

[0061] S303: Determine the standard deviation corresponding to the m voltage drops.

[0062] In this embodiment, the standard deviation is a statistic used to measure the degree of dispersion of a set of data. Take the m voltage drop data obtained previously as a data set and calculate their standard deviation through a specific formula. The larger the standard deviation, the greater the degree of dispersion of this set of voltage drop data, that is, the greater the difference in voltage drops among the load branches; the smaller the standard deviation, the more concentrated the voltage drop data and the smaller the difference in voltage drops among the load branches.

[0063] S304: Determine the load balance degree corresponding to the standard deviation; the larger the standard deviation, the smaller the load balance degree of the vehicle low-voltage auxiliary power supply device.

[0064] In this embodiment, since the standard deviation reflects the degree of dispersion of the voltage drops across the load branches, and the difference in voltage drops reflects the imbalance of load distribution to a certain extent, the larger the standard deviation, the greater the difference in voltage drops among the load branches, the more uneven the load distribution, and the smaller the load balance degree of the vehicle low-voltage auxiliary power supply device. On the contrary, the smaller the standard deviation, the greater the load balance degree. In this way, a corresponding relationship between the standard deviation and the load balance degree is established, so that the load balance status of the vehicle low-voltage auxiliary power supply device can be quantitatively evaluated according to the standard deviation of the voltage drop.

[0065] In this embodiment, it can be a preset mapping relationship between the standard deviation and the load balance degree. Based on this mapping relationship, the load balance degree corresponding to the standard deviation can be determined.

[0066] It can be seen that by calculating the standard deviation of the voltage drops of each parallel load branch to determine the load balance degree, the balance degree of load distribution can be accurately quantified. Since the voltage drop is directly related to the load size, the difference in voltage drops of each branch can intuitively reflect the unevenness of load distribution, and the standard deviation quantifies this difference, thus accurately reflecting the load balance status of the entire system. Abnormal load distribution can be detected in a timely manner. When the standard deviation is large, that is, when the load balance degree is small, it indicates that the voltage drop differences of each load branch are large, and there may be situations where some loads are overloaded or underloaded. The quantification result of the load balance degree can provide data support for the optimal design of the vehicle's low-voltage auxiliary power supply equipment. Designers can adjust the circuit layout, optimize the load distribution scheme, or select appropriate power supply equipment parameters according to the load balance degree to improve the overall performance and efficiency of the system, ensure that each load can operate within a reasonable working range, and extend the service life of the equipment. The standard deviation is a standardized statistic with clear numerical significance and comparability. For low-voltage auxiliary power supply equipment of different vehicles or under different operating conditions, the load balance degree can be obtained by calculating the standard deviation of its voltage drop, so as to conduct intuitive comparison and evaluation.

[0067] Exemplarily, determine a second fine-tuning parameter corresponding to the load balance degree. Specifically, it can be a preset mapping relationship between the load balance degree and the fine-tuning parameter. Based on this mapping relationship, the second fine-tuning parameter corresponding to the load balance degree can be determined.

[0068] Exemplarily, adjust the voltage average value based on the second fine-tuning parameter to obtain the first voltage threshold. Specifically, calculate the first voltage threshold according to the following formula:

[0069] First voltage threshold = voltage average value × (1 + second fine-tuning parameter);

[0070] According to the above formula, the voltage average value can be adjusted based on the second fine-tuning parameter to obtain the first voltage threshold.

[0071] Exemplarily, determine the average value of the n temperature values to obtain the temperature average value. Specifically, add up the temperature values corresponding to the n abnormal moments extracted previously, and then divide by n to obtain the temperature average value. This average value can represent the overall temperature level of the equipment under abnormal conditions to a certain extent.

[0072] Exemplarily, obtain the average ambient temperature corresponding to the n abnormal moments. Specifically, the ambient temperature will affect the temperature of the equipment. Collect the ambient temperature data corresponding to the n abnormal moments and calculate the average value of these ambient temperatures, which helps to more accurately analyze the relationship between the temperature change of the equipment itself and environmental factors.

[0073] Exemplarily, a third fine-tuning parameter corresponding to the average ambient temperature is determined. Specifically, it can be a mapping relationship between a preset ambient temperature and a fine-tuning parameter. Based on this mapping relationship, the third fine-tuning parameter corresponding to the average ambient temperature can be determined.

[0074] Exemplarily, the average temperature is adjusted based on the third fine-tuning parameter to obtain the first temperature threshold. Specifically, the first temperature threshold is calculated according to the following formula:

[0075] First temperature threshold = average temperature × (1 + third fine-tuning parameter);

[0076] Based on the above formula, the average temperature can be adjusted based on the third fine-tuning parameter to obtain the first temperature threshold.

[0077] It can be seen that by extracting the current, voltage, and temperature values corresponding to n abnormal moments from the historical abnormal data, the data source can be focused on the scenarios where the device has problems. Based on these abnormal data, the characteristics of each parameter of the device in the abnormal state can be grasped more accurately. By calculating the average values of the n current values, voltage values, and temperature values respectively, the influence of accidental factors can be reduced to a certain extent. Because the data of a single abnormal moment may be affected by instantaneous interference or special circumstances, while the average value can integrate the data of multiple abnormal moments and more stably represent the general level of each parameter of the device in the abnormal state. The line resistance will affect the current. Different line resistances will result in different current values under the same voltage. Determining the first fine-tuning parameter corresponding to the line resistance and adjusting the average current can make the first current threshold more in line with the actual circuit situation. The load balance degree reflects the evenness of the load distribution of each load of the vehicle low-voltage auxiliary power supply device. Load imbalance will cause voltage fluctuations. If the load balance degree is not considered, the voltage threshold setting may be unreasonable. By determining the second fine-tuning parameter corresponding to the load balance degree to adjust the average voltage, the ambient temperature has an important impact on the temperature of the device itself. Under different ambient temperatures, the normal operating temperature range of the device will also be different. Obtain the average ambient temperature corresponding to n abnormal moments and determine the corresponding third fine-tuning parameter to adjust the average temperature. The first current threshold, the first voltage threshold, and the first temperature threshold obtained after the above comprehensive consideration and adjustment can more accurately determine whether the vehicle low-voltage auxiliary power supply device is in an abnormal state. When the actual operating parameters of the device exceed these thresholds, it can be detected in time and corresponding protection measures can be taken, such as controlling the intelligent fuse to cut off the power supply, to avoid damage to the device due to abnormal operation and improve the reliability of the entire system.

[0078] S203: Obtain the current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period.

[0079] In this embodiment, in addition to paying attention to the abnormal data itself, it is also necessary to obtain the changes of current, voltage, and temperature over time of the device within a preset historical time period. These change data can reflect the dynamic change laws of the parameters of the device in normal and abnormal states. For example, the fluctuation range of current, the rising or falling trend of voltage, the change rate of temperature, etc. By analyzing these change data, the operating characteristics of the device can be more comprehensively understood. Therefore, the current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period are obtained.

[0080] S204: Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data.

[0081] In this embodiment, exemplarily, a straight line of current change is obtained by fitting according to the current change data. Specifically, fitting methods such as the least squares method, the gradient descent method, and the polynomial fitting method can be used for fitting. Through the above methods, based on the determined current change data, a straight line that can describe its change trend, that is, the straight line of current change, can be fitted, thereby providing a basis for subsequent analysis of the current change law and determination of relevant parameters.

[0082] Exemplarily, a straight line of voltage change is obtained by fitting according to the voltage change data. Specifically, fitting methods such as the least squares method, the gradient descent method, and the polynomial fitting method can also be used for fitting. Through the above methods, based on the determined voltage change data, a straight line that can describe its change trend, that is, the straight line of voltage change, can be fitted, thereby providing a basis for subsequent analysis of the voltage change law and determination of relevant parameters.

[0083] Exemplarily, a straight line of temperature change is obtained by fitting according to the temperature change data. Specifically, fitting methods such as the least squares method, the gradient descent method, and the polynomial fitting method can also be used for fitting. Through the above methods, based on the determined temperature change data, a straight line that can describe its change trend, that is, the straight line of temperature change, can be fitted, thereby providing a basis for subsequent analysis of the temperature change law and determination of relevant parameters.

[0084] Exemplarily, determine the first slope corresponding to the current change line, the second slope corresponding to the voltage change line, and the third slope corresponding to the temperature change line. Specifically, for each fitted line, the slope is a key parameter, and the slope represents the degree of inclination of the line. In this embodiment, the current change line, the voltage change line, and the temperature change line respectively reflect the change rates of current, voltage, and temperature over time. The first slope represents the change rate of current over time, the second slope represents the change rate of voltage over time, and the third slope represents the change rate of temperature over time. By calculating these slopes, we can quantify the change speed of the parameters. For example, a larger slope means that the parameter has a larger change in a short time.

[0085] Exemplarily, obtain the mapping relationship between the slope of the fitted line and the optimization factor. Specifically, the optimization factor is an important parameter for adjusting the device parameter threshold, and there is a certain correlation between it and the slope of the fitted line. The mapping relationship can be determined in advance by methods such as experiments, data analysis, or machine learning. For example, through the analysis of a large amount of historical data, it is found that the larger the slope, the larger the corresponding optimization factor, indicating that the parameter changes faster and has a greater impact on the judgment of device anomalies. This mapping relationship can be represented in the form of a function, a table, or a model.

[0086] Exemplarily, based on the mapping relationship, determine the first optimization factor corresponding to the first slope, the second optimization factor corresponding to the second slope, and the third optimization factor corresponding to the third slope. Specifically, after obtaining the slope of the fitted line and the mapping relationship, the optimization factor corresponding to each slope can be determined according to the mapping relationship. Substitute the first slope into the mapping relationship to obtain the corresponding first optimization factor. Similarly, obtain the second optimization factor corresponding to the second slope and the third optimization factor corresponding to the third slope.

[0087] It can be seen that by fitting the straight lines of current, voltage, and temperature changes and determining their slopes, the changing trends of these physical quantities over time can be quantified. The slope reflects the rate of change. For example, the slope of the current change straight line can indicate how fast the current increases or decreases over time. This helps to more accurately understand the operating state of the vehicle's low-voltage auxiliary power supply device and the changing characteristics of these parameters at different times. Converting the complex current, voltage, and temperature change data into the slopes of straight lines makes the data more concise and intuitive, facilitating analysis and comparison. The severity of the changes in different physical quantities can be directly judged by comparing the magnitudes of the slopes, or the differences in the rates of change of the same physical quantity in different time periods can be observed. Obtaining the mapping relationship between the slopes of the fitting straight lines and the optimization factors and determining the optimization factors corresponding to each slope based on this can provide a basis for the subsequent optimization of the current, voltage, and temperature thresholds. This method can dynamically determine the optimization factors according to the data change situation during the actual operation of the device, and then optimize the thresholds. This enables the system to better adapt to different working conditions and environmental changes, improving the adaptability and reliability of the entire system. For example, when the vehicle is in different driving conditions, the current, voltage, and temperature change situations of the power supply device will be different. Through this method, the thresholds can be adjusted in a timely manner according to the actual changes to ensure that the intelligent fuse can take protection measures at the appropriate time.

[0088] S205: Optimize the first current threshold based on the first optimization factor to obtain a second current threshold.

[0089] In this embodiment, the second current threshold is specifically calculated according to the following formula:

[0090] Second current threshold = First current threshold × (1 + First optimization factor);

[0091] Based on the above formula, the first current threshold can be optimized based on the first optimization factor to obtain a second current threshold.

[0092] S206: Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold.

[0093] In this embodiment, the second voltage threshold is specifically calculated according to the following formula:

[0094] Second voltage threshold = First voltage threshold × (1 + Second optimization factor);

[0095] Based on the above formula, the first voltage threshold can be optimized based on the second optimization factor to obtain a second voltage threshold.

[0096] S207: Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold.

[0097] In this embodiment, the second temperature threshold is specifically calculated according to the following formula:

[0098] Second temperature threshold = First temperature threshold × (1 + Third optimization factor);

[0099] Based on the above formula, the first temperature threshold can be optimized based on the third optimization factor to obtain the second temperature threshold.

[0100] S208: Control the intelligent fuse to perform the operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold.

[0101] In this embodiment, the intelligent fuse or the associated monitoring system continuously and real-time monitors the current, voltage, and temperature parameters of the vehicle low-voltage auxiliary power supply device. For example, the current is monitored by a current sensor, the voltage is monitored by a voltage sensor, and the device temperature is monitored by a temperature sensor. The real-time monitored current, voltage, and temperature values are respectively compared with the second current threshold, the second voltage threshold, and the second temperature threshold. If the monitored current value exceeds the second current threshold, this indicates that the current is in an abnormal state and may cause damage to the device. At this time, the intelligent fuse will receive a signal regarding current abnormality. When the monitored voltage value exceeds the second voltage threshold, it means that the voltage is abnormal, and the intelligent fuse will receive a voltage abnormality signal. This may be caused by reasons such as power supply failure or load abnormality, which may affect the normal operation of the device or even damage the device. If the temperature value is higher than the second temperature threshold, it means that the device temperature is too high, which may cause safety problems, and the intelligent fuse will receive a temperature abnormality signal. This may be caused by reasons such as poor device heat dissipation or excessive load.

[0102] The intelligent fuse comprehensively considers the comparison results of these three parameters. In this embodiment, as long as one parameter exceeds the corresponding threshold, the operation of cutting off the power supply may be triggered. However, in some cases, certain logic rules may also be set, for example, it is required that two or three parameters exceed the threshold simultaneously to perform the cutting-off operation, which depends on the specific system design and safety requirements.

[0103] When the intelligent fuse determines that the power supply needs to be cut off according to the set logic, it will cut off the circuit of the vehicle low-voltage auxiliary power supply device through an internal control mechanism, such as driving an electromagnetic mechanism or a semiconductor switch, thereby preventing the current from continuing to flow to the device, playing a role in protecting the device and the vehicle electrical system, and avoiding faults or safety accidents caused by current, voltage, or temperature abnormalities.

[0104] It can be seen that by collecting historical abnormal data within a preset historical time period to determine the first current threshold, the first voltage threshold, and the first temperature threshold, these historical data are real records when the device actually has an abnormality. The thresholds determined based on this can better fit the actual operating conditions of the device. Compared with setting thresholds only based on theoretical values or general standards, it can more accurately identify whether the device is in an abnormal state. Obtain the current, voltage, and temperature change data within the preset historical time period, and determine the corresponding optimization factors to optimize the initial thresholds to obtain the second current threshold, the second voltage threshold, and the second temperature threshold. These change data reflect the dynamic change characteristics of the device parameters over time. The thresholds optimized considering these characteristics can more sensitively capture the subtle changes in the device operating state, further improving the accuracy of abnormality judgment. When the current, voltage, or temperature of the device exceeds the optimized second threshold, the intelligent fuse will quickly perform the operation of cutting off the power supply, which can effectively prevent the device from continuing to operate in an abnormal state and prevent further damage to the device caused by overcurrent, overvoltage, or overheating, such as avoiding serious faults such as circuit short circuits and component burnout, thereby extending the service life of the device and improving the reliability of the entire vehicle low-voltage auxiliary power supply device system. The method in this embodiment can not only cut off the power supply in time when the device has obvious abnormalities, but also, through the analysis of the change data and the optimization of the thresholds, discover potential problems in the device operation in advance. For example, a slight change in current or voltage may indicate hidden dangers inside the device. The optimized thresholds can more sensitively capture these changes, providing a basis for preventive maintenance, avoiding the sudden occurrence of faults, and reducing the maintenance cost and vehicle downtime.

[0105] Please refer to Figure 5 , Figure 5 which is a flowchart for restoring the power supply of the vehicle low-voltage auxiliary power supply device provided by the embodiment of the present application, including but not limited to the following steps:

[0106] S501: Obtain the first current, the first voltage, and the first temperature corresponding to the vehicle low-voltage auxiliary power supply device at the first moment.

[0107] In this embodiment, the first moment is any moment after controlling the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold. After the intelligent fuse cuts off the power supply of the vehicle low-voltage auxiliary power supply device according to the second current threshold, the second voltage threshold, and the second temperature threshold, the corresponding current value, voltage value, and temperature value of the vehicle low-voltage auxiliary power supply device at this time are obtained in real time through corresponding measuring devices (such as current sensors, voltage sensors, temperature sensors, etc.). Taking the first moment as an example, the first current, the first voltage, and the first temperature corresponding to the vehicle low-voltage auxiliary power supply device at the first moment are obtained, so as to determine whether the vehicle low-voltage auxiliary power supply device meets the condition for restoring power supply at the first moment.

[0108] It should be noted that the monitoring method for determining whether any moment after controlling the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold meets the condition for restoring power supply is similar to that of the first moment, so that the operating state of the vehicle low-voltage auxiliary power supply device can be monitored in real time, and it can be judged when the vehicle low-voltage auxiliary power supply device can reach the condition for restoring power supply.

[0109] S502: Determine the stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the first current, the first voltage, and the first temperature.

[0110] In this embodiment, the larger the stability degree value, the better the stability of the vehicle low-voltage auxiliary power supply device. Please refer to Figure 6 , Figure 6 is a flowchart for determining the stability degree value provided by an embodiment of the present application, including but not limited to the following steps:

[0111] S601: Determine the current difference between the first current and a preset current.

[0112] In this embodiment, the first current is the current value of the vehicle low-voltage auxiliary power supply device measured at a specific first moment, and the preset current is a reference current value set according to the normal working requirements or standards of the vehicle low-voltage auxiliary power supply device. By calculating the difference between the first current and the preset current, the deviation degree between the current and the normal reference value can be understood.

[0113] S602: Determine the current deviation rate based on the current difference and the preset current.

[0114] In this embodiment, the current deviation rate is used to more accurately measure the relative degree of the current deviating from the preset value. The current deviation rate can be determined by dividing the current difference by the preset current. This value can help us intuitively understand the deviation of the first current from the preset current, so as to comprehensively evaluate the operating state of the vehicle low-voltage auxiliary power supply device subsequently.

[0115] S603: Determine the voltage difference between the first voltage and the preset voltage.

[0116] In this embodiment, the first voltage is the voltage value of the vehicle low-voltage auxiliary power supply device measured at a specific first moment, and the preset voltage is a reference voltage value set according to the normal working requirements or standards of the vehicle low-voltage auxiliary power supply device. By calculating the difference between the first voltage and the preset voltage, the deviation degree between the current voltage and the normal reference value can be understood.

[0117] S604: Determine the voltage deviation rate based on the voltage difference and the preset voltage.

[0118] In this embodiment, the voltage deviation rate is used to more accurately measure the relative degree of the voltage deviating from the preset value. The voltage deviation rate can be determined by dividing the voltage difference by the preset voltage. This value can help us intuitively understand the deviation of the first voltage from the preset voltage, so as to comprehensively evaluate the operating state of the vehicle low-voltage auxiliary power supply device subsequently.

[0119] S605: Determine the temperature difference between the first temperature and the preset temperature.

[0120] In this embodiment, the first temperature is the temperature value of the vehicle low-voltage auxiliary power supply device measured at a specific first moment, and the preset temperature is a reference temperature value set according to the normal working requirements or standards of the vehicle low-voltage auxiliary power supply device. By calculating the difference between the first temperature and the preset temperature, the deviation degree between the current temperature and the normal reference value can be understood.

[0121] S606: Determine the temperature deviation rate based on the temperature difference and the preset temperature.

[0122] In this embodiment, the temperature deviation rate is used to more accurately measure the relative degree of the temperature deviating from the preset value. The temperature deviation rate can be determined by dividing the temperature difference by the preset temperature. This value can help us intuitively understand the deviation of the first temperature from the preset temperature, so as to comprehensively evaluate the operating state of the vehicle low-voltage auxiliary power supply device subsequently.

[0123] S607: Determine the target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate.

[0124] In this embodiment, exemplarily, determine a first weight corresponding to the current deviation rate, a second weight corresponding to the voltage deviation rate, and a third weight corresponding to the temperature deviation rate, where the sum of the first weight, the second weight, and the third weight is 1. Specifically, in order to comprehensively evaluate the stability of the vehicle low-voltage auxiliary power supply device, it is necessary to consider the importance of each of the three factors: the current deviation rate, the voltage deviation rate, and the temperature deviation rate. Here, the importance of each deviation rate is reflected by assigning a weight to it. The first weight corresponds to the current deviation rate, the second weight corresponds to the voltage deviation rate, and the third weight corresponds to the temperature deviation rate, and the sum of these three weights is 1 to ensure that the sum of their proportions in the comprehensive calculation is complete. For example, if it is considered that the current deviation has the greatest impact on the device stability, a relatively large weight, such as 0.5, may be assigned to the current deviation rate, while the weights of the voltage deviation rate and the temperature deviation rate can be 0.3 and 0.2 respectively. The specific assignment of weights needs to be determined according to the characteristics of the device and the actual operating conditions.

[0125] Exemplarily, determine a second moment when the intelligent fuse performs an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold.

[0126] Exemplarily, determine the time difference between the second moment and the first moment. Specifically, the first moment is any moment after the intelligent fuse cuts off the power supply operation. By calculating the time difference between the second moment (the moment of cutting off the power supply) and the first moment, it can be known how long it has passed from cutting off the power supply to the concerned first moment. This time difference may be an important factor for analyzing the recovery situation or stability of the device. For example, if the time difference is short, it may indicate that the device is still in an unstable transition stage. If the time difference is long, the device may have had enough time to adjust and recover, and its stability may be different.

[0127] Exemplarily, determine an adjustment factor corresponding to the time difference. Specifically, it can be a mapping relationship between a preset time difference and the adjustment factor. Based on this mapping relationship, the adjustment factor corresponding to the time difference can be determined.

[0128] Exemplarily, adjust the reference deviation rate based on the adjustment factor to obtain the target deviation rate. Specifically, calculate the target deviation rate according to the following formula:

[0129] Target deviation rate = reference deviation rate × (1 + adjustment factor);

[0130] According to the above formula, the reference deviation rate can be adjusted based on the adjustment factor to obtain the target deviation rate.

[0131] It can be seen that by determining the current deviation rate, voltage deviation rate, and temperature deviation rate, and assigning corresponding weights to them respectively to calculate the reference deviation rate, it is possible to comprehensively consider the influence of changes in multiple key parameters on the stability of the vehicle's low-voltage auxiliary power supply device during its operation. Different parameters have different degrees of importance for the stable operation of the device, and the setting of the weights can be flexibly adjusted according to the actual situation, making the calculation result more in line with the actual operation characteristics of the device. Determining the second moment when the intelligent fuse cuts off the power supply and the time difference from the first moment, and determining the adjustment factor based on the time difference fully considers the influence of time on the device state. At different time points after the power supply is cut off, the recovery situation and stability degree of the device are often different. The adjustment factor corresponding to the time difference can reflect the change trend of the device's stability degree over time, so as to more accurately evaluate the actual stability state of the device at a specific moment. Adjusting the reference deviation rate based on the adjustment factor to obtain the target deviation rate, this method combines the comprehensive evaluation of multiple parameters and the dynamic adjustment of time factors, and can more accurately reflect the true stability degree of the vehicle's low-voltage auxiliary power supply device at the first moment. Compared with the evaluation methods that only consider a single parameter or do not consider time factors, it greatly improves the accuracy and reliability of the evaluation, provides a more scientific basis for subsequent judgment of the device state and taking corresponding control measures, and helps to more effectively ensure the stable operation and safety of the vehicle's low-voltage auxiliary power supply device.

[0132] S608: Determine the stability degree value corresponding to the vehicle's low-voltage auxiliary power supply device at the first moment based on the target deviation rate.

[0133] In this embodiment, the smaller the target deviation rate, the larger the stability degree value. Determining the stability degree value of the device at the first moment according to the target deviation rate, there is usually an inverse proportional relationship between the two. That is, the smaller the target deviation rate, the closer the device is to the normal working state in terms of current, voltage, temperature, etc., the better the stability of the device, and the corresponding stability degree value is also larger. The specific conversion relationship may be determined by factors such as the characteristics of the device, historical data, and actual application requirements, and may be calculated through a specific function or empirical formula. For example, when the target deviation rate is 5%, the corresponding stability degree value may be 80 (assuming the stability degree value range is 0-100), and when the target deviation rate is reduced to 3%, the stability degree value may increase to 90. In this way, the stability degree of the device at the first moment can be quantitatively evaluated through the target deviation rate.

[0134] It can be seen that the stability of the vehicle low-voltage auxiliary power supply equipment is affected by multiple factors such as current, voltage, and temperature. Calculating the deviation rates of these three parameters respectively can comprehensively reflect the operating conditions of the equipment in different aspects and avoid one-sidedness caused by judging based on a single parameter. By comprehensively calculating the current, voltage, and temperature deviation rates to obtain the target deviation rate and determining the stability degree value based on this, a quantitative evaluation of the equipment stability is achieved. This quantitative method makes the judgment of the equipment state more objective and accurate, facilitating operators or control systems to make accurate decisions according to specific values. The preset current, voltage, and temperature values are usually the reference standards for the normal operation of the equipment. By calculating the deviation rates, the deviation degree of the equipment operating parameters from the standard values can be detected in a timely manner, which helps to detect potential faults or abnormalities at an early stage. Even if the equipment has not shown obvious faults, small changes in the deviation rates may indicate performance changes or potential problems of some components, providing a basis for preventive maintenance and avoiding serious consequences caused by equipment failures. Different vehicle operating conditions may have different requirements for the low-voltage auxiliary power supply equipment. Through this evaluation method based on deviation rates, it is possible to flexibly adapt to the evaluation of equipment stability under various operating conditions according to the actually set preset values. For example, during different operating stages such as vehicle startup, acceleration, and deceleration, the preset values can be adjusted according to actual needs, so as to accurately evaluate the stability degree of the equipment under different operating conditions and ensure the stable operation of the equipment in various situations.

[0135] S503: When the stability degree value is greater than the preset stability degree value, control the intelligent fuse to perform an operation to restore the power supply of the vehicle low-voltage auxiliary power supply equipment.

[0136] In this embodiment, the preset stability degree value is a standard for measuring whether the equipment is stable enough to restore power supply. When the stability degree value calculated based on the first current, the first voltage, and the first temperature is greater than this preset stability degree value, it indicates that the stability of the vehicle low-voltage auxiliary power supply equipment has reached the condition for restoring power supply. At this time, the control system will issue an instruction to make the intelligent fuse perform the operation of restoring power supply, enabling the vehicle low-voltage auxiliary power supply equipment to start providing power to the relevant systems or equipment of the vehicle again to ensure the normal operation of the vehicle. For example, if the preset stability degree value is 80 and the calculated stability degree value is 85, which is greater than the preset value, then the intelligent fuse will act to restore the power supply to the equipment.

[0137] It can be seen that power supply is restored only when the stability degree value is greater than the preset stability degree value, ensuring that the device has the conditions for stable operation before restarting, avoiding premature or unnecessary power supply restoration, reducing the impact of frequent start and stop of the device on the electrical system, and improving the stability and efficiency of the system. At the same time, this intelligent control method also reduces the need for manual intervention and improves the automation level of the vehicle electrical system. The vehicle low-voltage auxiliary power supply device provides power support for many important systems of the vehicle, such as lighting, signals, electronic control units, etc. Ensuring the stable operation of these devices is crucial for the safe driving of the vehicle. Through the above control strategy, equipment failures can be detected and handled in a timely manner, reducing safety risks caused by electrical system failures, such as light outages and electronic device malfunctions, ensuring driving safety, and can also reduce equipment failures and system downtime, improving the overall reliability and availability of the vehicle.

[0138] In summary, implementing the embodiments of the present application has the following beneficial effects:

[0139] It can be seen that the method for protecting a vehicle low-voltage auxiliary power supply device described in the embodiments of the present application is applied to a vehicle low-voltage auxiliary power supply device protection system. The vehicle low-voltage auxiliary power supply device protection system includes an intelligent fuse and a vehicle low-voltage auxiliary power supply device. First, historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period is obtained, and then based on the historical abnormal data, a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device are determined. Then, current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period are obtained, and then a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data are determined. Then, based on the first optimization factor, the first current threshold is optimized to obtain a second current threshold, and based on the second optimization factor, the first voltage threshold is optimized to obtain a second voltage threshold, and based on the third optimization factor, the first temperature threshold is optimized to obtain a second temperature threshold. Finally, based on the second current threshold, the second voltage threshold, and the second temperature threshold, the intelligent fuse is controlled to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device, improving the safety of the vehicle low-voltage auxiliary power supply device.

[0140] Please refer to Figure 7 , Figure 7It is a schematic structural diagram of a protection device for a vehicle low-voltage auxiliary power supply device provided by an embodiment of the present application. The protection device 700 for the vehicle low-voltage auxiliary power supply device is applied to a vehicle low-voltage auxiliary power supply device protection system. The vehicle low-voltage auxiliary power supply device protection system includes an intelligent fuse and a vehicle low-voltage auxiliary power supply device. The protection device 700 for the vehicle low-voltage auxiliary power supply device includes: an acquisition unit 701 and a processing unit 702;

[0141] The acquisition unit 701 is configured to acquire historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period;

[0142] The processing unit 702 is configured to determine a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data;

[0143] Acquire current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period;

[0144] Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data;

[0145] Optimize the first current threshold based on the first optimization factor to obtain a second current threshold;

[0146] Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold;

[0147] Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold;

[0148] Control the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold.

[0149] In some possible implementation manners, in terms of determining the first current threshold, the first voltage threshold, and the first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data, the processing unit 702 is specifically configured to:

[0150] Determine n abnormal moments based on the historical abnormal data, and n current values, n voltage values, and n temperature values corresponding to the n abnormal moments; n is an integer greater than 1;

[0151] Determine the average value of the n current values to obtain an average current value;

[0152] Acquire the line resistance of the vehicle low-voltage auxiliary power supply device;

[0153] Determine a first fine-tuning parameter corresponding to the line resistance;

[0154] Adjust the average current based on the first fine-tuning parameter to obtain the first current threshold;

[0155] Determine the average value of the n voltage values to obtain the average voltage;

[0156] Determine the load balance degree of the vehicle low-voltage auxiliary power supply device;

[0157] Determine a second fine-tuning parameter corresponding to the load balance degree;

[0158] Adjust the average voltage based on the second fine-tuning parameter to obtain the first voltage threshold;

[0159] Determine the average value of the n temperature values to obtain the average temperature;

[0160] Obtain the average ambient temperature corresponding to the n abnormal times;

[0161] Determine a third fine-tuning parameter corresponding to the average ambient temperature;

[0162] Adjust the average temperature based on the third fine-tuning parameter to obtain the first temperature threshold.

[0163] In some possible implementation manners, in determining the load balance degree of the vehicle low-voltage auxiliary power supply device, the processing unit 702 is specifically configured to:

[0164] Determine m parallel load branches corresponding to the vehicle low-voltage auxiliary power supply device; m is an integer greater than 1;

[0165] Obtain the voltage drop corresponding to each parallel load branch in the m parallel load branches to obtain m voltage drops;

[0166] Determine the standard deviation corresponding to the m voltage drops;

[0167] Determine the load balance degree corresponding to the standard deviation; the greater the standard deviation, the smaller the load balance degree of the vehicle low-voltage auxiliary power supply device.

[0168] In some possible implementation manners, in determining the first optimization factor corresponding to the current change data, the second optimization factor corresponding to the voltage change data, and the third optimization factor corresponding to the temperature change data, the processing unit 702 is specifically configured to:

[0169] Perform fitting according to the current change data to obtain a current change straight line;

[0170] Fitting is performed based on the voltage change data to obtain a voltage change straight line;

[0171] Fitting is performed based on the temperature change data to obtain a temperature change straight line;

[0172] Determine a first slope corresponding to the current change straight line, a second slope corresponding to the voltage change straight line, and a third slope corresponding to the temperature change straight line;

[0173] Obtain the mapping relationship between the slope of the fitting straight line and the optimization factor;

[0174] Based on the mapping relationship, determine a first optimization factor corresponding to the first slope, a second optimization factor corresponding to the second slope, and a third optimization factor corresponding to the third slope.

[0175] In some possible implementation manners, the processing unit 702 is further specifically configured to:

[0176] Obtain a first current, a first voltage, and a first temperature corresponding to the vehicle low-voltage auxiliary power supply device at a first moment; the first moment is any moment after the operation of controlling the intelligent fuse to cut off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold;

[0177] Based on the first current, the first voltage, and the first temperature, determine a stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment; the larger the stability degree value, the better the stability of the vehicle low-voltage auxiliary power supply device;

[0178] When the stability degree value is greater than a preset stability degree value, control the intelligent fuse to perform an operation of restoring the power supply of the vehicle low-voltage auxiliary power supply device.

[0179] In some possible implementation manners, in terms of determining the stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the first current, the first voltage, and the first temperature, the processing unit 702 is specifically configured to:

[0180] Determine the current difference between the first current and a preset current;

[0181] Based on the current difference and the preset current, determine the current deviation rate;

[0182] Determine the voltage difference between the first voltage and a preset voltage;

[0183] Based on the voltage difference and the preset voltage, determine the voltage deviation rate;

[0184] Determine the temperature difference between the first temperature and a preset temperature;

[0185] Determine a temperature deviation rate based on the temperature difference value and the preset temperature;

[0186] Determine a target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate;

[0187] Determine a stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the target deviation rate; the smaller the target deviation rate, the larger the stability degree value.

[0188] In some possible implementation manners, in terms of determining the target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate, the processing unit 702 is specifically configured to:

[0189] Determine a first weight value corresponding to the current deviation rate, a second weight value corresponding to the voltage deviation rate, and a third weight value corresponding to the temperature deviation rate; the sum of the first weight value, the second weight value, and the third weight value is 1;

[0190] Perform a calculation based on the current deviation rate, the voltage deviation rate, the temperature deviation rate, the first weight value, the second weight value, and the third weight value to obtain a reference deviation rate;

[0191] Determine a second moment when the intelligent fuse performs an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold;

[0192] Determine a time difference between the second moment and the first moment;

[0193] Determine an adjustment factor corresponding to the time difference;

[0194] Adjust the reference deviation rate based on the adjustment factor to obtain the target deviation rate.

[0195] Please refer to Figure 8 , Figure 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present application. As Figure 8 shown, the electronic device 800 includes a transceiver 801, a processor 802, and a memory 803. They are connected through a bus 804. The memory 803 is used to store computer programs and data, and the transceiver 801 can transmit the data stored in the memory 803 to the processor 802. The above programs include instructions for performing the following steps:

[0196] Obtain historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period;

[0197] Determine a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data;

[0198] Obtain current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period;

[0199] Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data;

[0200] Optimize the first current threshold based on the first optimization factor to obtain a second current threshold;

[0201] Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold;

[0202] Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold;

[0203] Control the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold.

[0204] In some possible implementation manners, in terms of determining the first current threshold, the first voltage threshold, and the first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data, the above program includes instructions for performing the following steps:

[0205] Determine n abnormal moments based on the historical abnormal data, and n current values, n voltage values, and n temperature values corresponding to the n abnormal moments; n is an integer greater than 1;

[0206] Determine the average value of the n current values to obtain an average current value;

[0207] Obtain the line resistance of the vehicle low-voltage auxiliary power supply device;

[0208] Determine a first fine-tuning parameter corresponding to the line resistance;

[0209] Adjust the average current value based on the first fine-tuning parameter to obtain the first current threshold;

[0210] Determine the average value of the n voltage values to obtain an average voltage value;

[0211] Determine the load balance degree of the vehicle low-voltage auxiliary power supply device;

[0212] Determine a second fine-tuning parameter corresponding to the load balance degree;

[0213] Adjust the average voltage based on the second fine-tuning parameter to obtain the first voltage threshold;

[0214] Determine the average value of the n temperature values to obtain the average temperature;

[0215] Obtain the average ambient temperature corresponding to the n abnormal times;

[0216] Determine the third fine-tuning parameter corresponding to the average ambient temperature;

[0217] Adjust the average temperature based on the third fine-tuning parameter to obtain the first temperature threshold.

[0218] In some possible implementation manners, in determining the load balance degree of the vehicle low-voltage auxiliary power supply device, the above program includes instructions for performing the following steps:

[0219] Determine m parallel load branches corresponding to the vehicle low-voltage auxiliary power supply device; m is an integer greater than 1;

[0220] Obtain the voltage drop corresponding to each parallel load branch in the m parallel load branches to obtain m voltage drops;

[0221] Determine the standard deviation corresponding to the m voltage drops;

[0222] Determine the load balance degree corresponding to the standard deviation; the greater the standard deviation, the smaller the load balance degree of the vehicle low-voltage auxiliary power supply device.

[0223] In some possible implementation manners, in determining the first optimization factor corresponding to the current change data, the second optimization factor corresponding to the voltage change data, and the third optimization factor corresponding to the temperature change data, the above program includes instructions for performing the following steps:

[0224] Perform fitting according to the current change data to obtain a current change straight line;

[0225] Perform fitting according to the voltage change data to obtain a voltage change straight line;

[0226] Perform fitting according to the temperature change data to obtain a temperature change straight line;

[0227] Determine the first slope corresponding to the current change straight line, the second slope corresponding to the voltage change straight line, and the third slope corresponding to the temperature change straight line;

[0228] Obtain the mapping relationship between the slope of the fitting straight line and the optimization factor;

[0229] Determine a first optimization factor corresponding to the first slope, a second optimization factor corresponding to the second slope, and a third optimization factor corresponding to the third slope based on the mapping relationship.

[0230] In some possible implementation manners, the above program includes instructions for performing the following steps:

[0231] Obtain a first current, a first voltage, and a first temperature corresponding to the vehicle low-voltage auxiliary power supply device at a first moment; the first moment is any moment after controlling the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold;

[0232] Determine a stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the first current, the first voltage, and the first temperature; the larger the stability degree value, the better the stability of the vehicle low-voltage auxiliary power supply device;

[0233] When the stability degree value is greater than a preset stability degree value, control the intelligent fuse to perform an operation of restoring the power supply of the vehicle low-voltage auxiliary power supply device.

[0234] In some possible implementation manners, in terms of determining a stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the first current, the first voltage, and the first temperature, the above program includes instructions for performing the following steps:

[0235] Determine a current difference between the first current and a preset current;

[0236] Determine a current deviation rate based on the current difference and the preset current;

[0237] Determine a voltage difference between the first voltage and a preset voltage;

[0238] Determine a voltage deviation rate based on the voltage difference and the preset voltage;

[0239] Determine a temperature difference between the first temperature and a preset temperature;

[0240] Determine a temperature deviation rate based on the temperature difference and the preset temperature;

[0241] Determine a target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate;

[0242] Determine a stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the target deviation rate; the smaller the target deviation rate, the larger the stability degree value.

[0243] In some possible embodiments, in terms of determining the target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate, the above program includes instructions for performing the following steps:

[0244] Determine a first weight corresponding to the current deviation rate, a second weight corresponding to the voltage deviation rate, and a third weight corresponding to the temperature deviation rate; the sum of the first weight, the second weight, and the third weight is 1;

[0245] Based on the current deviation rate, the voltage deviation rate, the temperature deviation rate, the first weight, the second weight, and the third weight, perform calculations to obtain a reference deviation rate;

[0246] Determine a second time when the intelligent fuse performs an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold;

[0247] Determine the time difference between the second time and the first time;

[0248] Determine an adjustment factor corresponding to the time difference;

[0249] Based on the adjustment factor, adjust the reference deviation rate to obtain the target deviation rate.

[0250] It should be understood that the electronic devices in this application may include protection devices for vehicle low-voltage auxiliary power supply devices, smartphones (such as Android phones, iOS phones, Windows Phone phones, etc.), tablet computers, palm computers, laptop computers, mobile Internet devices MID (Mobile Internet Devices, abbreviated as MID), or wearable devices, or servers, edge computing nodes, etc. The above electronic devices are only examples, not an exhaustive list, and include but are not limited to the above electronic devices.

[0251] An embodiment of this application also provides a computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement part or all of the steps of any one of the vehicle low-voltage auxiliary power supply device protection methods described in the above method embodiments.

[0252] An embodiment of this application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute part or all of the steps of any one of the vehicle low-voltage auxiliary power supply device protection methods described in the above method embodiments.

[0253] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0254] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0255] In the several embodiments provided by this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical or other form.

[0256] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0257] In addition, in each embodiment of this application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software program modules.

[0258] When the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of this application. And the aforementioned memory includes: various media that can store program codes, such as USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks, or optical discs.

[0259] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program. This program can be stored in a computer-readable memory, and the memory can include: flash drives, read-only memories (abbreviation in English: Read-Only Memory, referred to as: ROM), random access memories (abbreviation in English: Random Access Memory, referred to as: RAM), magnetic disks, or optical discs, etc.

[0260] The above has introduced the embodiments of this application in detail. Specific examples are used in this article to elaborate on the principles and embodiments of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific embodiments and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A protection method for a vehicle low-voltage auxiliary power supply device, characterized in that, Applied to a vehicle low-voltage auxiliary power supply equipment protection system, the vehicle low-voltage auxiliary power supply equipment protection system includes an intelligent fuse and a vehicle low-voltage auxiliary power supply equipment, and the method includes: Obtain historical abnormal data of the vehicle low-voltage auxiliary power supply equipment within a preset historical time period; Determine a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply equipment based on the historical abnormal data; Obtain current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply equipment within the preset historical time period; Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data; Optimize the first current threshold based on the first optimization factor to obtain a second current threshold; Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold; Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold; Control the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply equipment based on the second current threshold, the second voltage threshold, and the second temperature threshold; Wherein, the determining the first current threshold, the first voltage threshold, and the first temperature threshold of the vehicle low-voltage auxiliary power supply equipment based on the historical abnormal data includes: Determine n abnormal moments based on the historical abnormal data, and n current values, n voltage values, and n temperature values corresponding to the n abnormal moments; n is an integer greater than 1; Determine the average value of the n current values to obtain an average current value; Obtain the line resistance of the vehicle low-voltage auxiliary power supply equipment; Determine a first fine-tuning parameter corresponding to the line resistance; Adjust the average current value based on the first fine-tuning parameter to obtain the first current threshold; Determine the average value of the n voltage values to obtain an average voltage value; Determine the load balance degree of the vehicle low-voltage auxiliary power supply equipment; Determine a second fine-tuning parameter corresponding to the load balance degree; Adjust the average voltage value based on the second fine-tuning parameter to obtain the first voltage threshold; Determine the average value of the n temperature values to obtain an average temperature value; Obtain the average ambient temperature corresponding to the n abnormal moments; Determine a third fine-tuning parameter corresponding to the average ambient temperature; Adjust the average temperature value based on the third fine-tuning parameter to obtain the first temperature threshold.

2. The method according to claim 1, wherein The determining the load balance degree of the vehicle low-voltage auxiliary power supply equipment includes: Determine m parallel load branches corresponding to the vehicle low-voltage auxiliary power supply equipment; m is an integer greater than 1; Obtain the voltage drop corresponding to each parallel load branch in the m parallel load branches to obtain m voltage drops; Determine the standard deviation of the m voltage drops; Determine the load balance degree corresponding to the standard deviation; the greater the standard deviation, the smaller the load balance degree of the vehicle low-voltage auxiliary power supply equipment.

3. The method according to claim 2, wherein Determining a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data includes: Performing fitting based on the current change data to obtain a current change straight line; Performing fitting based on the voltage change data to obtain a voltage change straight line; Performing fitting based on the temperature change data to obtain a temperature change straight line; Determining a first slope corresponding to the current change straight line, a second slope corresponding to the voltage change straight line, and a third slope corresponding to the temperature change straight line; Obtaining a mapping relationship between the slope of the fitting straight line and the optimization factor; Based on the mapping relationship, determining a first optimization factor corresponding to the first slope, a second optimization factor corresponding to the second slope, and a third optimization factor corresponding to the third slope.

4. The method according to claim 3, wherein The method further includes: Obtaining a first current, a first voltage, and a first temperature corresponding to the vehicle low-voltage auxiliary power supply device at a first moment; the first moment is any moment after controlling the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold; Determining a stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the first current, the first voltage, and the first temperature; the larger the stability degree value, the better the stability of the vehicle low-voltage auxiliary power supply device; When the stability degree value is greater than a preset stability degree value, controlling the intelligent fuse to perform an operation of restoring the power supply of the vehicle low-voltage auxiliary power supply device.

5. The method according to claim 4, wherein The determining the stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the first current, the first voltage, and the first temperature includes: Determining a current difference between the first current and a preset current; Determining a current deviation rate based on the current difference and the preset current; Determining a voltage difference between the first voltage and a preset voltage; Determining a voltage deviation rate based on the voltage difference and the preset voltage; Determining a temperature difference between the first temperature and a preset temperature; Determining a temperature deviation rate based on the temperature difference and the preset temperature; Determining a target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate; Determining the stability degree value corresponding to the vehicle low-voltage auxiliary power supply device at the first moment based on the target deviation rate; the smaller the target deviation rate, the larger the stability degree value.

6. The method according to claim 5, wherein The determining the target deviation rate based on the current deviation rate, the voltage deviation rate, and the temperature deviation rate includes: Determining a first weight corresponding to the current deviation rate, a second weight corresponding to the voltage deviation rate, and a third weight corresponding to the temperature deviation rate; the sum of the first weight, the second weight, and the third weight is 1; Performing calculations based on the current deviation rate, the voltage deviation rate, the temperature deviation rate, the first weight, the second weight, and the third weight to obtain a reference deviation rate; Determine a second moment when the intelligent fuse performs an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold; Determine a time difference between the second moment and the first moment; Determine an adjustment factor corresponding to the time difference; Adjust the reference deviation rate based on the adjustment factor to obtain the target deviation rate.

7. A protection device for a vehicle low-voltage auxiliary power supply device, characterized in that, Applied to a vehicle low-voltage auxiliary power supply device protection system, the vehicle low-voltage auxiliary power supply device protection system includes an intelligent fuse and a vehicle low-voltage auxiliary power supply device, and the device includes: an acquisition unit and a processing unit; The acquisition unit is configured to acquire historical abnormal data of the vehicle low-voltage auxiliary power supply device within a preset historical time period; The processing unit is configured to determine a first current threshold, a first voltage threshold, and a first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data; Acquire current change data, voltage change data, and temperature change data of the vehicle low-voltage auxiliary power supply device within the preset historical time period; Determine a first optimization factor corresponding to the current change data, a second optimization factor corresponding to the voltage change data, and a third optimization factor corresponding to the temperature change data; Optimize the first current threshold based on the first optimization factor to obtain a second current threshold; Optimize the first voltage threshold based on the second optimization factor to obtain a second voltage threshold; Optimize the first temperature threshold based on the third optimization factor to obtain a second temperature threshold; Control the intelligent fuse to perform an operation of cutting off the power supply of the vehicle low-voltage auxiliary power supply device based on the second current threshold, the second voltage threshold, and the second temperature threshold; Wherein, determining the first current threshold, the first voltage threshold, and the first temperature threshold of the vehicle low-voltage auxiliary power supply device based on the historical abnormal data includes: Determine n abnormal moments based on the historical abnormal data, and n current values, n voltage values, and n temperature values corresponding to the n abnormal moments; n is an integer greater than 1; Determine an average value of the n current values to obtain an average current value; Acquire the line resistance of the vehicle low-voltage auxiliary power supply device; Determine a first fine-tuning parameter corresponding to the line resistance; Adjust the average current value based on the first fine-tuning parameter to obtain the first current threshold; Determine an average value of the n voltage values to obtain an average voltage value; Determine the load balance degree of the vehicle low-voltage auxiliary power supply device; Determine a second fine-tuning parameter corresponding to the load balance degree; Adjust the average voltage value based on the second fine-tuning parameter to obtain the first voltage threshold; Determine an average value of the n temperature values to obtain an average temperature value; Acquire an average ambient temperature corresponding to the n abnormal moments; Determine a third fine-tuning parameter corresponding to the average ambient temperature; Adjust the average temperature value based on the third fine-tuning parameter to obtain the first temperature threshold.

8. An electronic device, characterized in that, Comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the one or more programs include instructions for performing the steps in the method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method according to any one of claims 1-6.

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