A safe charging monitoring system and safe charging method to prevent battery overheating during charging

Abstract

The present invention relates to the technical field of battery charging, and specifically discloses a safe charging monitoring system and a safe charging method for preventing overheating of a battery during charging. The system comprises a region division module, a charging data acquisition module, a data preprocessing module, a charging data analysis module, a safety control warning module, a charging data comprehensive analysis module, a battery charging safety assessment module, and a user interface module. The present invention collects comprehensive parameters of charging data during the charging process of a two-wheeled electric vehicle, preprocesses the comprehensive parameters, analyzes the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety factor, and then analyzes to obtain a battery charging comprehensive safety assessment index. Not only does the charging pile directly intervene in the charging process management to effectively prevent overheating, but the user interface module also realizes real-time sharing of charging status and battery safety information, greatly improving charging safety and user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging, and in particular to a safe charging monitoring system and a safe charging method for preventing overheating of a battery during charging. Background Art

[0002] In recent years, with the improvement of environmental awareness and technological progress, electric vehicles, especially two-wheeled electric vehicles, have been widely promoted and applied around the world due to their environmental protection and convenience. However, while electric vehicles bring convenience, their charging safety issues have become increasingly prominent, becoming one of the key factors restricting the further development of electric vehicles.

[0003] During the charging process of electric vehicles, battery overheating is a common safety hazard. Battery overheating may not only lead to a decline in battery performance and shortened life, but more seriously may also cause safety accidents such as fire and explosion, bringing great safety risks and economic losses to users; the traditional battery overheating safety charging monitoring system during charging mainly focuses on the monitoring of the battery side's own conditions, and ensures the safety of the charging process by preventing overcurrent, overload, overvoltage and other situations, although they can effectively control battery problems caused by overheating to a certain extent. However, in actual use, there are still some shortcomings. On the one hand, the charging pile lacks the ability to monitor the battery charging status in real time, and cannot respond to abnormal battery temperature in time. It is difficult to actively intervene in the charging process in dangerous situations for intelligent regulation or emergency stop charging to prevent battery overheating; on the other hand, most systems only monitor basic parameters such as charging current and voltage, but the monitoring of key parameters such as battery temperature, charging pile temperature, and charging pile load is insufficient, making it difficult to accurately reflect the true state of the battery; in addition, users lack real-time understanding of the battery status during the charging process, and cannot obtain instant feedback on battery temperature, charging progress and safety status, which not only affects the user experience, but also limits the user's independent management and control of charging safety. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a safe charging monitoring system for preventing overheating of a battery during charging, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a safe charging monitoring system and a safe charging method for preventing battery overheating during charging, the system comprising a regional division module, a charging data acquisition module, a data preprocessing module, a charging data analysis module, a safety control early warning module, a charging data comprehensive analysis module, a battery charging safety assessment module, and a user interface module.

[0006] Area division module: used to determine the target two-wheeled electric vehicle charging time as the target area, divide it into various monitoring sub-areas according to the equal time division method, and number each monitoring sub-area in sequence as 1, 2, ..., i, ..., n;

[0007] Charging data acquisition module: including battery temperature information acquisition unit, charging pile safety information acquisition unit, and charging pile load information acquisition unit. Each acquisition unit is used to collect comprehensive parameters of charging information of each monitoring sub-area and transmit the collected comprehensive parameters to the data preprocessing module;

[0008] Data preprocessing module: used to preprocess the comprehensive parameters of the charging information collected by the charging data collection module, and transmit the preprocessed data to the charging data analysis module;

[0009] Charging data analysis module: including a battery temperature analysis unit, a charging pile safety analysis unit, and a charging pile load analysis unit, which imports the data transmitted by the data preprocessing module into the corresponding mathematical model, calculates the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety coefficient of each monitoring sub-area, and transmits the calculation results to the safety control and early warning module;

[0010] Safety control warning module: used to compare the data transmitted by the charging data analysis module with the preset value to determine whether there is a safety anomaly, and start the safety control link of the charging pile in the abnormal area;

[0011] Charging data comprehensive analysis module: Based on the battery safety temperature coefficient, charging pile safety assessment coefficient, and charging pile load safety factor obtained after comparison and judgment by the safety control and early warning module, a mathematical model is established to calculate the comprehensive safety assessment index of battery charging in the target area, and the index is transmitted to the battery charging safety assessment module;

[0012] A battery charging safety assessment module: used to compare and analyze the battery charging comprehensive safety assessment index calculated by the charging data comprehensive analysis module with a preset safety assessment index threshold, obtain a judgment result, and transmit the judgment result to the user interface module;

[0013] User interface module: used to receive battery charging status and warning information, display them intuitively through the user interface, and provide charging suggestions and safety warnings to maintenance personnel and users.

[0014] Preferably, the battery temperature information collection unit is used to collect battery temperature parameters of each monitoring sub-area, including the battery temperature at the start of charging and the battery temperature after the charging interval time t, which are marked as Tb1 and Tb2 respectively. It should be specifically noted that in order to ensure that Tb1 and Tb2 can reflect the actual change of the battery temperature and avoid the influence of the ambient temperature fluctuation on the battery temperature in a fluctuating manner, resulting in Tb1 and Tb2 being consistent, the interval time t is set to one hour to one and a half hours;

[0015] The charging pile safety information collection unit is used to collect the charging pile safety parameters of each monitoring sub-area, including charging time, upper limit of charging pile safety charging temperature, maximum temperature reached by the charging pile during charging, ambient temperature, charging pile safety temperature margin, actual output energy of the charging pile, and total energy input from the power grid by the charging pile;

[0016] The charging pile load information collection unit is used to collect the charging pile load parameters of each monitoring sub-area, including the recordable working time of the charging pile, the abnormal consumption time of the charging pile, the active power supply of the charging pile, the reactive power supply of the charging pile, and the power consumption of the charging pile.

[0017] Preferably, the data preprocessing module preprocesses the collected data by performing noise reduction, outlier detection, and outlier processing on the data through existing filtering technology.

[0018] Preferably, the calculation model of the battery safety temperature coefficient of each monitoring sub-area is as follows:

[0019] ,in, Expressed as the battery safety temperature coefficient of the i-th monitoring sub-area, It represents the battery temperature when charging starts in the i-th monitoring sub-area. It is represented as the battery temperature after the charging interval time t of the i-th monitoring sub-area. The charging interval time ranges from one hour to one and a half hours. It is expressed as the allowable temperature error value of the preset battery temperature during the monitoring process. Expressed as other influencing factors of battery temperature, Represented as the preset battery temperature error influencing factor.

[0020] Preferably, the calculation steps of the charging pile safety assessment coefficient of each monitoring sub-area are as follows:

[0021] Step S01: Calculate the safe charging time coefficient, the calculation model is as follows:

[0022] ,in, Expressed as the safe charging time coefficient of the i-th monitoring sub-area, It is represented as the charging time of the ith monitoring sub-area, Represents a preset safe charging time threshold;

[0023] Step S02: Calculate the safety assessment coefficient of the charging pile, and the calculation model is as follows:

[0024] ,in, It is expressed as the charging pile safety assessment coefficient of the i-th monitoring sub-area, Expressed as the safe charging time coefficient of the i-th monitoring sub-area, It is represented as the upper limit of safe charging temperature of the charging pile in the i-th monitoring sub-area, It is represented as the maximum temperature reached by the charging pile during the charging period of the i-th monitoring sub-area, Expressed as ambient temperature, It is expressed as the safety temperature margin of the charging pile. It is represented by the actual output energy of the charging pile at the jth charging time, It is represented by the total energy input from the grid by the charging pile at the jth charging time, j is the charging time, and j belongs to i.

[0025] Preferably, the calculation steps of the charging pile load safety factor of each monitoring sub-area are as follows:

[0026] Step S01: Calculate the working time of the charging pile, and the calculation model is as follows:

[0027] ,in, It is represented as the working time of the charging pile in the i-th monitoring sub-area, It is represented as the charging pile recordable working time in the i-th monitoring sub-area, It is represented as the abnormal consumption time of the charging pile in the i-th monitoring sub-area;

[0028] Step S02: Calculate the safety factor of the charging pile load. The calculation model is as follows:

[0029] ,in, It is expressed as the charging pile load safety factor of the i-th monitoring sub-area, It is represented by the active power supply of the charging pile in the i-th monitoring sub-area, It is represented by the reactive power supply of the charging pile in the i-th monitoring sub-area, It is represented by the power consumption of the charging pile in the i-th monitoring sub-area, It is represented as the working time of the charging pile in the i-th monitoring sub-area, It represents the power consumption per unit time of the preset charging pile.

[0030] Preferably, the specific manner in which the safety control warning module compares the data transmitted by the charging data analysis module with the preset value is:

[0031] Extract the battery safety temperature coefficient of each monitoring sub-area in the target area , and the formula for the battery safety temperature fluctuation coefficient of each monitoring sub-area in the target area is obtained: ,in, Represented as the preset battery safety temperature threshold, if the battery safety temperature coefficient of the i-th monitoring sub-area Greater than or equal to the preset battery safety temperature threshold , then it is judged that the battery charging temperature is normal. If the battery safety temperature coefficient of the i-th monitoring sub-area Lower than the preset battery safety temperature threshold , it is determined that the battery charging temperature is abnormal, the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued;

[0032] Extract the charging pile safety assessment coefficient of each monitoring sub-area in the target area , and the formula for the fluctuation coefficient of charging pile safety assessment change in each monitoring sub-area in the target area is obtained:

[0033] ,in, Represented as the preset charging pile safety threshold, if the charging pile safety assessment coefficient of the i-th monitoring sub-area Greater than or equal to the preset charging pile safety threshold , then it is judged that the safety of the charging pile is normal. If the charging pile safety assessment coefficient of the i-th monitoring sub-area Less than the preset charging pile safety threshold , it is judged that there is an abnormality in the safety of the charging pile, and the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued;

[0034] Extract the charging pile load safety factor of each monitoring sub-area in the target area , the formula for the fluctuation coefficient of charging pile load change in each monitoring sub-area in the target area is obtained: ,in, Represented as the preset charging pile load safety threshold, if the charging pile load safety factor of the i-th monitoring sub-area Greater than or equal to the preset charging pile load safety threshold , then it is judged that there is no abnormality in the charging pile load. If the charging pile load safety factor of the i-th monitoring sub-area Less than the preset charging pile load safety threshold , it is judged that there is an abnormality in the charging pile load, the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued.

[0035] Preferably, the target area battery charging comprehensive safety assessment index calculation model is as follows:

[0036] ,in, It is represented by the comprehensive safety assessment index of battery charging in the target area. Expressed as the battery safety temperature coefficient of the i-th monitoring sub-area, It is expressed as the charging pile safety assessment coefficient of the i-th monitoring sub-area, It is expressed as the charging pile load safety factor of the i-th monitoring sub-area, , and Represents a constant.

[0037] Preferably, the specific method of comparative analysis of the battery charging safety assessment module is:

[0038] Obtain the comprehensive safety assessment index of battery charging in the target area and compare it with the preset safety assessment index threshold. If the comprehensive safety assessment index of battery charging is greater than or equal to the preset safety assessment index threshold, it indicates that there is no abnormality in the battery charging process in the target area. If the comprehensive safety assessment index of battery charging is less than the preset safety assessment index threshold, it indicates that there is a safety abnormality in the battery charging process in the target area. The abnormal area number should be sent to the corresponding management personnel for review, and an abnormal data analysis report should be generated to issue a warning signal.

[0039] Preferably, a safe charging method for preventing overheating of a battery during charging comprises the following steps:

[0040] Step S01: Start the charging system to start charging the battery;

[0041] Step S02: The charging data acquisition module collects battery temperature parameters, charging pile safety parameters, and charging pile load parameters of the battery in real time during the charging process;

[0042] Step S03: preprocessing the parameters collected in step S02;

[0043] Step S04: Analyze the data pre-processed in step S03 to obtain the battery safety temperature coefficient, charging pile safety assessment coefficient, and charging pile load safety coefficient of each monitoring sub-area;

[0044] Step S05: Compare the data analyzed in step S04 with the preset value to determine whether a safety anomaly occurs, and start the safety control link of the charging pile in the abnormal area;

[0045] Step S06: Analyze and obtain the comprehensive safety assessment index of battery charging in the target area according to the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety factor;

[0046] Step S07: Compare and analyze the comprehensive safety assessment index of battery charging in the target area with a preset safety assessment index threshold, obtain a judgment result, and transmit the judgment result to the user interface module;

[0047] Step S08: Receive the battery charging status and warning information, display them intuitively through the user interface, and provide charging suggestions and safety warnings to maintenance personnel and users.

[0048] Technical effects and advantages of the present invention:

[0049] 1. The present invention collects comprehensive parameters of charging data during the charging process of the two-wheeled electric vehicle, pre-processes the comprehensive parameters, analyzes the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety coefficient, and then analyzes to obtain the battery charging comprehensive safety assessment index. Not only does the charging pile directly intervene in the charging process management to effectively prevent overheating, but also the user interface module realizes the real-time sharing of charging status and battery safety information, which greatly improves charging safety and user experience;

[0050] 2. The present invention monitors and analyzes the charging process data, and can intervene from the charging pile in dangerous situations to control or stop the charging process, thereby increasing charging safety;

[0051] 3. The present invention can provide the battery monitoring data to the user in the form of a report, prompt the user with battery safety information, and further provide a basis for the user to detect, repair and replace the battery, thereby enhancing the safety of the battery in the two-wheeled electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0053] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention.

[0054] Figure 2 This is a schematic diagram of the structure of the charging data acquisition module acquisition unit of the present invention.

[0055] Figure 3 It is a schematic diagram of the method flow structure of the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] See also Figure 1-3 As shown, the present invention provides a safe charging monitoring system for preventing battery overheating during charging, including a region division module, a charging data acquisition module, a data preprocessing module, a charging data analysis module, a safety control warning module, a charging data comprehensive analysis module, a battery charging safety assessment module, and a user interface module.

[0058] The output end of the area division module is electrically connected to the input end of the charging data acquisition module, the output end of the charging data acquisition module is electrically connected to the input end of the data preprocessing module, the output end of the data preprocessing module is electrically connected to the input end of the charging data analysis module, the output end of the charging data analysis module is electrically connected to the input end of the safety control and early warning module, the output end of the safety control and early warning module is electrically connected to the input end of the charging data comprehensive analysis module, the output end of the charging data comprehensive analysis module is electrically connected to the input end of the battery charging safety assessment module and the input end of the user interface module respectively, and the output end of the battery charging safety assessment module is electrically connected to the input end of the user interface module.

[0059] The area division module is used to determine the target two-wheeled electric vehicle charging time as the target area, divide it into monitoring sub-areas according to the equal time division method, and number each monitoring sub-area in sequence as 1, 2, ..., i, ..., n;

[0060] The charging data acquisition module includes a battery temperature information acquisition unit, a charging pile safety information acquisition unit, and a charging pile load information acquisition unit, each acquisition unit is used to collect charging information comprehensive parameters of each monitoring sub-area, and transmit the collected comprehensive parameters to the data preprocessing module;

[0061] In this embodiment, it should be specifically noted that the battery temperature information acquisition unit is used to collect battery temperature parameters of each monitoring sub-area, including the battery temperature at the start of charging and the battery temperature after the charging interval time t, which are marked as Tb1 and Tb2 respectively. It should be specifically noted that in order to ensure that Tb1 and Tb2 can reflect the actual change of the battery temperature and avoid the influence of the ambient temperature fluctuation on the battery temperature in a fluctuating manner, resulting in Tb1 and Tb2 being consistent, the interval time t is set to one hour to one and a half hours;

[0062] The charging pile safety information collection unit is used to collect the charging pile safety parameters of each monitoring sub-area, including charging time, upper limit of charging pile safety charging temperature, maximum temperature reached by the charging pile during charging, ambient temperature, charging pile safety temperature margin, actual output energy of the charging pile, and total energy input from the power grid by the charging pile;

[0063] The charging pile load information collection unit is used to collect the charging pile load parameters of each monitoring sub-area, including the recordable working time of the charging pile, the abnormal consumption time of the charging pile, the active power supply of the charging pile, the reactive power supply of the charging pile, and the power consumption of the charging pile.

[0064] The data preprocessing module is used to preprocess the comprehensive parameters of the charging information collected by the charging data collection module, and transmit the preprocessed data to the charging data analysis module;

[0065] In this embodiment, it should be specifically explained that the data preprocessing module preprocesses the collected data by performing noise reduction, outlier detection, and outlier processing on the data through existing filtering technology.

[0066] The charging data analysis module includes a battery temperature analysis unit, a charging pile safety analysis unit, and a charging pile load analysis unit, which imports the data transmitted by the data preprocessing module into the corresponding mathematical model, calculates the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety coefficient of each monitoring sub-area, and transmits the calculation results to the safety control and early warning module;

[0067] In this embodiment, it should be specifically explained that the calculation model of the battery safety temperature coefficient of each monitoring sub-area is as follows:

[0068] ,in, Expressed as the battery safety temperature coefficient of the i-th monitoring sub-area, It represents the battery temperature when charging starts in the i-th monitoring sub-area. It is represented as the battery temperature after the charging interval time t of the i-th monitoring sub-area. The charging interval time ranges from one hour to one and a half hours. It is expressed as the allowable temperature error value of the preset battery temperature during the monitoring process. Expressed as other influencing factors of battery temperature, Represented as a preset battery temperature error influencing factor;

[0069] In this embodiment, it should be specifically explained that the battery temperature values ​​at different time points are collected by the charging data collection module. and The temperature change rate between the two can reflect the dynamic change of battery temperature.

[0070] In this embodiment, it should be specifically explained that the calculation steps of the charging pile safety assessment coefficient of each monitoring sub-area are as follows:

[0071] Step S01: Calculate the safe charging time coefficient, the calculation model is as follows:

[0072] ,in, Expressed as the safe charging time coefficient of the i-th monitoring sub-area, It is represented as the charging time of the ith monitoring sub-area, Represents a preset safe charging time threshold;

[0073] In this embodiment, it should be specifically explained that the safe charging time threshold refers to the recommended maximum continuous charging time under the premise of ensuring battery safety.

[0074] Step S02: Calculate the safety assessment coefficient of the charging pile, and the calculation model is as follows:

[0075] ,in, It is expressed as the charging pile safety assessment coefficient of the i-th monitoring sub-area, Expressed as the safe charging time coefficient of the i-th monitoring sub-area, It is represented as the upper limit of safe charging temperature of the charging pile in the i-th monitoring sub-area, It is represented as the maximum temperature reached by the charging pile during the charging period of the i-th monitoring sub-area, Expressed as ambient temperature, It is expressed as the safety temperature margin of the charging pile. It is represented by the actual output energy of the charging pile at the jth charging time, It is represented by the total energy input from the grid by the charging pile at the jth charging time, j is the charging time, and j belongs to i.

[0076] In this embodiment, it should be specifically explained that the calculation steps of the charging pile load safety factor of each monitoring sub-area are as follows:

[0077] Step S01: Calculate the working time of the charging pile, and the calculation model is as follows:

[0078] ,in, It is represented as the working time of the charging pile in the i-th monitoring sub-area, It is represented as the charging pile recordable working time in the i-th monitoring sub-area, It is represented as the abnormal consumption time of the charging pile in the i-th monitoring sub-area;

[0079] Step S02: Calculate the safety factor of the charging pile load. The calculation model is as follows:

[0080] ,in, It is expressed as the charging pile load safety factor of the i-th monitoring sub-area, It is represented by the active power supply of the charging pile in the i-th monitoring sub-area, It is represented by the reactive power supply of the charging pile in the i-th monitoring sub-area, It is represented by the power consumption of the charging pile in the i-th monitoring sub-area, It is represented as the working time of the charging pile in the i-th monitoring sub-area, It is expressed as the power consumption per unit time of the preset charging pile;

[0081] The safety control warning module is used to compare the data transmitted by the charging data analysis module with the preset value to determine whether there is a safety anomaly, and to start the safety control link of the charging pile in the abnormal area;

[0082] In this embodiment, it should be specifically explained that the specific manner in which the safety control warning module compares the data transmitted by the charging data analysis module with the preset value is:

[0083] Extract the battery safety temperature coefficient of each monitoring sub-area in the target area , and the formula for the battery safety temperature fluctuation coefficient of each monitoring sub-area in the target area is obtained: ,in, Represented as the preset battery safety temperature threshold, if the battery safety temperature coefficient of the i-th monitoring sub-area Greater than or equal to the preset battery safety temperature threshold , then it is judged that the battery charging temperature is normal. If the battery safety temperature coefficient of the i-th monitoring sub-area Lower than the preset battery safety temperature threshold , it is determined that the battery charging temperature is abnormal, the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued;

[0084] Extract the charging pile safety assessment coefficient of each monitoring sub-area in the target area , and the formula for the fluctuation coefficient of charging pile safety assessment change in each monitoring sub-area in the target area is obtained: ,in, Represented as the preset charging pile safety threshold, if the charging pile safety assessment coefficient of the i-th monitoring sub-area Greater than or equal to the preset charging pile safety threshold , then it is judged that the safety of the charging pile is normal. If the charging pile safety assessment coefficient of the i-th monitoring sub-area Less than the preset charging pile safety threshold , it is judged that there is an abnormality in the safety of the charging pile, and the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued;

[0085] Extract the charging pile load safety factor of each monitoring sub-area in the target area , the formula for the fluctuation coefficient of charging pile load change in each monitoring sub-area in the target area is obtained: ,in, Represented as the preset charging pile load safety threshold, if the charging pile load safety factor of the i-th monitoring sub-area Greater than or equal to the preset charging pile load safety threshold , then it is judged that there is no abnormality in the charging pile load. If the charging pile load safety factor of the i-th monitoring sub-area Less than the preset charging pile load safety threshold , it is judged that there is an abnormality in the charging pile load, the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued.

[0086] In this embodiment, it should be specifically explained that the specific control method of the safety control link of starting the charging pile in the abnormal area is:

[0087] If the battery charging temperature is abnormal, the charging process will be interrupted immediately in the abnormal area or an alarm signal will be sent to the fire protection system of the charging site. An alarm will also be sent to users and maintenance personnel to inform them of the battery overheating and advise them not to approach the vehicle immediately.

[0088] If there is an abnormality in the safety of the charging pile, the automatic power-off function of the charging pile power supply will be activated in the abnormal area to prevent electric shock accidents or fires, and the charging pile cooling system will be activated at the same time;

[0089] If there is an abnormality in the load of a charging pile, the charging strategy will be dynamically adjusted for the abnormal area, and charging vehicles will be intelligently dispatched to avoid overloading of a single charging pile. The output power of the charging pile will be reasonably allocated, the charging speed will be reduced, and the recommended charging time will be pushed to users. It is recommended to charge during non-peak hours to alleviate the load on the charging pile.

[0090] The charging data comprehensive analysis module establishes a mathematical model to calculate the comprehensive safety assessment index of battery charging in the target area based on the battery safety temperature coefficient, charging pile safety assessment coefficient, and charging pile load safety factor obtained after comparison and judgment by the safety control and early warning module, and transmits it to the battery charging safety assessment module;

[0091] In this embodiment, it should be specifically explained that the calculation model of the comprehensive safety assessment index of battery charging in the target area is as follows:

[0092] ,in, It is represented by the comprehensive safety assessment index of battery charging in the target area. Expressed as the battery safety temperature coefficient of the i-th monitoring sub-area, It is expressed as the charging pile safety assessment coefficient of the i-th monitoring sub-area, It is expressed as the charging pile load safety factor of the i-th monitoring sub-area, , and Represents a constant.

[0093] The battery charging safety assessment module is used to compare and analyze the battery charging comprehensive safety assessment index calculated by the charging data comprehensive analysis module with a preset safety assessment index threshold, obtain a judgment result, and transmit the judgment result to the user interface module;

[0094] In this embodiment, it should be specifically explained that the specific method of the battery charging safety assessment module for comparative analysis is:

[0095] Obtain the comprehensive safety assessment index of battery charging in the target area and compare it with the preset safety assessment index threshold. If the comprehensive safety assessment index of battery charging is greater than or equal to the preset safety assessment index threshold, it indicates that there is no abnormality in the battery charging process in the target area. If the comprehensive safety assessment index of battery charging is less than the preset safety assessment index threshold, it indicates that there is a safety abnormality in the battery charging process in the target area. The abnormal area number should be sent to the corresponding management personnel for review, and an abnormal data analysis report should be generated to issue a warning signal.

[0096] The user interface module is used to receive the battery charging status and warning information, intuitively display them through the user interface, and provide charging suggestions and safety warnings to maintenance personnel and users.

[0097] See also Figure 3 As shown, the present invention provides a safe charging method to prevent overheating of a battery during charging, comprising the following steps:

[0098] Step S01: Start the charging system to start charging the battery;

[0099] Step S02: The charging data acquisition module collects battery temperature parameters, charging pile safety parameters, and charging pile load parameters of the battery in real time during the charging process;

[0100] Step S03: preprocessing the parameters collected in step S02;

[0101] Step S04: Analyze the data pre-processed in step S03 to obtain the battery safety temperature coefficient, charging pile safety assessment coefficient, and charging pile load safety coefficient of each monitoring sub-area;

[0102] Step S05: Compare the data analyzed in step S04 with the preset value to determine whether a safety anomaly occurs, and start the safety control link of the charging pile in the abnormal area;

[0103] Step S06: Analyze and obtain the comprehensive safety assessment index of battery charging in the target area according to the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety factor;

[0104] Step S07: Compare and analyze the comprehensive safety assessment index of battery charging in the target area with a preset safety assessment index threshold, obtain a judgment result, and transmit the judgment result to the user interface module;

[0105] Step S08: Receive the battery charging status and warning information, display them intuitively through the user interface, and provide charging suggestions and safety warnings to maintenance personnel and users.

[0106] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0107] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A safe charging monitoring system to prevent overheating of a battery during charging, characterized in that: include: Area division module: used to determine the target two-wheeled electric vehicle charging time as the target area, divide it into various monitoring sub-areas according to the equal time division method, and number each monitoring sub-area in sequence as 1, 2, ..., i, ..., n; Charging data acquisition module: including battery temperature information acquisition unit, charging pile safety information acquisition unit, and charging pile load information acquisition unit. Each acquisition unit is used to collect comprehensive parameters of charging information of each monitoring sub-area and transmit the collected comprehensive parameters to the data preprocessing module; Data preprocessing module: used to preprocess the comprehensive parameters of the charging information collected by the charging data collection module, and transmit the preprocessed data to the charging data analysis module; Charging data analysis module: including a battery temperature analysis unit, a charging pile safety analysis unit, and a charging pile load analysis unit, which imports the data transmitted by the data preprocessing module into the corresponding mathematical model, calculates the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety coefficient of each monitoring sub-area, and transmits the calculation results to the safety control and early warning module; Safety control warning module: used to compare the data transmitted by the charging data analysis module with the preset value to determine whether there is a safety anomaly, and start the safety control link of the charging pile in the abnormal area; Charging data comprehensive analysis module: Based on the battery safety temperature coefficient, charging pile safety assessment coefficient, and charging pile load safety factor obtained after comparison and judgment by the safety control and early warning module, a mathematical model is established to calculate the comprehensive safety assessment index of battery charging in the target area, and the index is transmitted to the battery charging safety assessment module; A battery charging safety assessment module: used to compare and analyze the battery charging comprehensive safety assessment index calculated by the charging data comprehensive analysis module with a preset safety assessment index threshold, obtain a judgment result, and transmit the judgment result to the user interface module; User interface module: used to receive battery charging status and warning information, display them intuitively through the user interface, and provide charging suggestions and safety warnings to maintenance personnel and users.

2. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The battery temperature information acquisition unit is used to collect battery temperature parameters of each monitoring sub-area, including the battery temperature at the start of charging and the battery temperature after the charging interval time t, which are marked as Tb1 and Tb2 respectively. It should be specifically noted that in order to ensure that Tb1 and Tb2 can reflect the actual change of battery temperature and avoid the influence of ambient temperature fluctuation on battery temperature in a fluctuating manner, resulting in Tb1 and Tb2 being consistent, the interval time t is set to one hour to one and a half hours; The charging pile safety information collection unit is used to collect the charging pile safety parameters of each monitoring sub-area, including charging time, upper limit of charging pile safety charging temperature, maximum temperature reached by the charging pile during charging, ambient temperature, charging pile safety temperature margin, actual output energy of the charging pile, and total energy input from the power grid by the charging pile; The charging pile load information collection unit is used to collect the charging pile load parameters of each monitoring sub-area, including the recordable working time of the charging pile, the abnormal consumption time of the charging pile, the active power supply of the charging pile, the reactive power supply of the charging pile, and the power consumption of the charging pile.

3. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The data preprocessing module preprocesses the collected data by performing noise reduction, outlier detection, and outlier processing on the data through existing filtering technology.

4. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The calculation model of the battery safety temperature coefficient of each monitoring sub-area is as follows: ,in, Expressed as the battery safety temperature coefficient of the i-th monitoring sub-area, It represents the battery temperature when charging starts in the i-th monitoring sub-area. It is represented as the battery temperature after the charging interval time t of the i-th monitoring sub-area. The charging interval time ranges from one hour to one and a half hours. It is expressed as the allowable temperature error value of the preset battery temperature during the monitoring process. Expressed as other influencing factors of battery temperature, Represented as the preset battery temperature error influencing factor.

5. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The calculation steps of the charging pile safety assessment coefficient of each monitoring sub-area are as follows: Step S01: Calculate the safe charging time coefficient, the calculation model is as follows: ,in, Expressed as the safe charging time coefficient of the i-th monitoring sub-area, It is represented as the charging time of the ith monitoring sub-area, Represents a preset safe charging time threshold; Step S02: Calculate the safety assessment coefficient of the charging pile, and the calculation model is as follows: ,in, It is expressed as the charging pile safety assessment coefficient of the i-th monitoring sub-area, Expressed as the safe charging time coefficient of the i-th monitoring sub-area, It is represented as the upper limit of safe charging temperature of the charging pile in the i-th monitoring sub-area, It is represented as the maximum temperature reached by the charging pile during the charging period of the i-th monitoring sub-area, Expressed as ambient temperature, It is expressed as the safety temperature margin of the charging pile. It is represented by the actual output energy of the charging pile at the jth charging time, It is represented by the total energy input from the grid by the charging pile at the jth charging time, j is the charging time, and j belongs to i.

6. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The calculation steps of the charging pile load safety factor of each monitoring sub-area are as follows: Step S01: Calculate the working time of the charging pile, and the calculation model is as follows: ,in, It is represented as the working time of the charging pile in the i-th monitoring sub-area, It is represented as the charging pile recordable working time in the i-th monitoring sub-area, It is represented as the abnormal consumption time of the charging pile in the i-th monitoring sub-area; Step S02: Calculate the safety factor of the charging pile load. The calculation model is as follows: ,in, It is expressed as the charging pile load safety factor of the i-th monitoring sub-area, It is represented by the active power supply of the charging pile in the i-th monitoring sub-area, It is represented by the reactive power supply of the charging pile in the i-th monitoring sub-area, It is represented by the power consumption of the charging pile in the i-th monitoring sub-area, It is represented as the working time of the charging pile in the i-th monitoring sub-area, It represents the power consumption per unit time of the preset charging pile.

7. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The specific method in which the safety control warning module compares the data transmitted by the charging data analysis module with the preset value is: Extract the battery safety temperature coefficient of each monitoring sub-area in the target area , and the formula for the battery safety temperature fluctuation coefficient of each monitoring sub-area in the target area is obtained: ,in, Represented as the preset battery safety temperature threshold, if the battery safety temperature coefficient of the i-th monitoring sub-area Greater than or equal to the preset battery safety temperature threshold , then it is judged that the battery charging temperature is normal. If the battery safety temperature coefficient of the i-th monitoring sub-area Lower than the preset battery safety temperature threshold , it is determined that the battery charging temperature is abnormal, the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued; Extract the charging pile safety assessment coefficient of each monitoring sub-area in the target area , and the formula for the fluctuation coefficient of charging pile safety assessment change in each monitoring sub-area in the target area is obtained: ,in, Represented as the preset charging pile safety threshold, if the charging pile safety assessment coefficient of the i-th monitoring sub-area Greater than or equal to the preset charging pile safety threshold , then it is judged that the safety of the charging pile is normal. If the charging pile safety assessment coefficient of the i-th monitoring sub-area Less than the preset charging pile safety threshold , it is judged that there is an abnormality in the safety of the charging pile, and the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued; Extract the charging pile load safety factor of each monitoring sub-area in the target area , the formula for the fluctuation coefficient of charging pile load change in each monitoring sub-area in the target area is obtained: ,in, Represented as the preset charging pile load safety threshold, if the charging pile load safety factor of the i-th monitoring sub-area Greater than or equal to the preset charging pile load safety threshold , then it is judged that there is no abnormality in the charging pile load. If the charging pile load safety factor of the i-th monitoring sub-area Less than the preset charging pile load safety threshold , it is judged that there is an abnormality in the charging pile load, the abnormal result is sent to the maintenance personnel and users, and an early warning signal is issued.

8. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The calculation model of the comprehensive safety assessment index of battery charging in the target area is as follows: ,in, It is represented by the comprehensive safety assessment index of battery charging in the target area. Expressed as the battery safety temperature coefficient of the i-th monitoring sub-area, It is expressed as the charging pile safety assessment coefficient of the i-th monitoring sub-area, It is expressed as the charging pile load safety factor of the i-th monitoring sub-area, , and Represents a constant.

9. A safe charging monitoring system for preventing battery overheating during charging according to claim 1, characterized in that: The specific method of comparative analysis of the battery charging safety assessment module is as follows: Obtain the comprehensive safety assessment index of battery charging in the target area and compare it with the preset safety assessment index threshold. If the comprehensive safety assessment index of battery charging is greater than or equal to the preset safety assessment index threshold, it indicates that there is no abnormality in the battery charging process in the target area. If the comprehensive safety assessment index of battery charging is less than the preset safety assessment index threshold, it indicates that there is a safety abnormality in the battery charging process in the target area. The abnormal area number should be sent to the corresponding management personnel for review, and an abnormal data analysis report should be generated to issue a warning signal.

10. A safe charging method for preventing overheating of a battery during charging, used for using a safe charging monitoring system for preventing overheating of a battery during charging as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step S01: Start the charging system to start charging the battery; Step S02: The charging data acquisition module collects battery temperature parameters, charging pile safety parameters, and charging pile load parameters of the battery in real time during the charging process; Step S03: preprocessing the parameters collected in step S02; Step S04: Analyze the data pre-processed in step S03 to obtain the battery safety temperature coefficient, charging pile safety assessment coefficient, and charging pile load safety coefficient of each monitoring sub-area; Step S05: Compare the data analyzed in step S04 with the preset value to determine whether a safety anomaly occurs, and start the safety control link of the charging pile in the abnormal area; Step S06: Analyze and obtain the comprehensive safety assessment index of battery charging in the target area according to the battery safety temperature coefficient, the charging pile safety assessment coefficient, and the charging pile load safety factor; Step S07: Compare and analyze the comprehensive safety assessment index of battery charging in the target area with a preset safety assessment index threshold, obtain a judgment result, and transmit the judgment result to the user interface module; Step S08: Receive the battery charging status and warning information, display them intuitively through the user interface, and provide charging suggestions and safety warnings to maintenance personnel and users.

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