Electric pile charging data detection method

Abstract

The present invention belongs to the technical field of electric pile data analysis, and relates to an electric pile charging data detection method. The method first combines the charging efficiency self-comparison abnormality and the charging efficiency reference abnormality of the target electric pile in the current time period to determine whether there is a substantial abnormality in the current charging efficiency of the target electric pile for a charging object, and avoids the conventional parameter application analysis of the prior art. It can not only improve the use efficiency and safety of portable charging piles, but also improve the reliability of the overall charging network. Then, based on the determination that there is a substantial abnormality in the current charging efficiency of the target electric pile for the charging object, the cause of the substantial abnormality in the current charging efficiency of the target electric pile for the charging object is traced and feedback is provided, and the abnormal performance of the built-in rectifier of the target electric pile in the current time period, the abnormal resistance of the charging link, and the abnormal environmental compatibility are evaluated, so as to effectively identify the specific factors that lead to the decrease in charging efficiency, and improve the charging service quality and user experience satisfaction.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric pile data analysis and relates to an electric pile charging data detection method. Background Art

[0002] With the rapid development of the new energy vehicle industry, electric vehicles, as an important part of it, have become more and more popular year by year. However, the widespread use of electric vehicles is inseparable from efficient and safe charging infrastructure - charging piles. In recent years, portable charging piles have gradually attracted market attention as a flexible and convenient charging method. They can not only meet the charging needs of electric vehicle users in specific scenarios, but also provide strong support for the popularization of electric vehicles. At the same time, portable charging piles also face challenges in safety and efficiency during use, and real-time data detection and analysis of the charging process are required.

[0003] In the prior art, there are also some solutions related to the detection of charging data of portable charging piles. For example, the invention patent application of a detection method and system of a portable charging pile with the publication number CN118362819A uses a monitoring device to collect the first data of the charging pile during operation, wherein the first data includes power data and external second data, and the first data and the external second data are integrated to establish a data analysis model, generate a charging pile detection evaluation coefficient, compare and analyze it with the preset working state of the charging pile, predict the abnormal situation that will occur during the operation of the charging pile, handle the abnormal operating state, and perform safety maintenance in time. Although it provides guarantee for the safe operation and user experience of the charging pile, thereby promoting the development of the charging facility industry, there are still limitations of the conventional technology, which are mainly manifested as: the existing technology over-relies on conventional power parameters such as current and voltage and conventional temperature parameters as the entry point of the basic working state, and ignores the in-depth analysis of charging abnormalities from the perspective of charging efficiency that users are directly concerned about, and does not have the ability to trace the causes of abnormal charging of the electric pile, which not only leads to the inability to comprehensively and accurately evaluate the efficiency performance during the charging process, but also may affect the user's trust and satisfaction with the portable charging pile. Summary of the invention

[0004] In view of this, in order to solve the problems raised in the above background technology, a method for detecting charging data of an electric pile is now proposed.

[0005] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a method for detecting charging data of an electric pile, including: S1. collecting the charging amount of the target electric pile for each unit time point in the current period of the charging object, and evaluating the charging efficiency self-comparison abnormality of the target electric pile in the current period.

[0006] S2. Perceive the current charging environment of the target charging pile for the charging object, retrieve the historical reference charging environments relative to the current charging environment of the target charging pile from the historical charging log of the target charging pile, and evaluate the reference abnormality of the charging efficiency of the target charging pile in the current period based on the charging amount of each unit time point within the same duration of the current period corresponding to each historical reference charging environment.

[0007] S3. Based on the self-comparison abnormality of the charging efficiency of the target electric pile in the current period and the reference abnormality of the charging efficiency, determine whether there is a substantial abnormality in the charging efficiency of the target electric pile for the charging object. If it is determined to be, execute S4.

[0008] S4. Trace the actual abnormal reason of the charging efficiency of the target charging pile for the charging object.

[0009] S5. Feedback the actual abnormal reason of the charging efficiency of the target charging pile for the charging object.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention adopts two angles, time dimension self-comparison and environmental dimension reference, to develop the comprehensive abnormality of the charging efficiency of the target charging pile in the current period, and uses this as a basis for judging whether there is a substantial abnormality in the charging efficiency of the target charging pile for the charging object, thereby avoiding the conventional parameter application analysis of the prior art, which can not only improve the use efficiency and safety of the portable charging pile, but also improve the reliability of the overall charging network.

[0011] (2) The present invention evaluates the abnormal performance of the built-in rectifier of the target charging pile, the abnormal resistance of the charging link, and the abnormal environmental compatibility during the current period, and traces the actual abnormal cause of the charging efficiency of the target charging pile for the charging object, effectively identifying the specific factors that lead to the decrease in charging efficiency, so that maintenance personnel can quickly find the problem, reduce troubleshooting time and improve maintenance efficiency.

[0012] (3) The present invention displays the evaluation indicators of abnormal performance of the built-in rectifier of the target charging pile, abnormal charging link resistance, and abnormal environmental compatibility in the current period through the charging target vehicle terminal page. Through this real-time and transparent information transmission method, the user's sense of control and trust in the charging process is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 The present invention is a flowchart of the steps for implementing the method.

[0015] Figure 2 It is a schematic diagram of charging a charging object by the target electric pile of the present invention.

[0016] Figure numerals: 1. Power supply socket; 2. Charging link; 3. Charging gun. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1 , 2 As shown, the present invention provides a method for detecting charging data of an electric pile, including: S1. collecting the charging amount of the target electric pile at each unit time point in the current period of the charging object, and evaluating the charging efficiency self-comparison abnormality of the target electric pile in the current period.

[0019] Specifically, the evaluation of the self-comparison abnormality of the charging efficiency of the target electric pile in the current time period includes: calculating the charging deviation of the target electric pile for each unit time point in the current time period of the charging object and its previous unit time point; if the charging deviation of a certain unit time point and its previous unit time point is lower than the charging amount allowed to be reduced per unit time of the preset electric pile, then the unit time point is marked as an abnormal time point, and the absolute difference between the charging deviation of the unit time point and the previous unit time point and the preset charging amount allowed to be reduced per unit time Δq0 is used as the abnormal charging reduction amount at the unit time point; thereby, the abnormal time points in the current time period of the target electric pile and their abnormal charging reduction amounts are obtained and accumulated, and the absolute ratio of the accumulated value to the preset charging amount allowed to be reduced per unit time of the electric pile is used as the self-comparison abnormality of the charging efficiency of the target electric pile in the current time period.

[0020] It should be noted that the above-mentioned Δq0<0.

[0021] The absolute ratio of the accumulated value to the allowed reduction in charging amount per unit time of the preset charging pile refers to the absolute ratio of the accumulated value to the allowed reduction in charging amount per unit time of the preset charging pile.

[0022] S2. Perceive the current charging environment of the target charging pile for the charging object, retrieve the historical reference charging environments relative to the current charging environment of the target charging pile from the historical charging log of the target charging pile, and evaluate the reference abnormality of the charging efficiency of the target charging pile in the current period based on the charging amount of each unit time point within the same duration of the current period corresponding to each historical reference charging environment.

[0023] Specifically, the sensing of the current charging environment of the target electric pile for the charging object includes: the built-in voltage sampling circuit of the target electric pile monitors and analyzes the input AC voltage value of the power supply to which it has established a physical connection at each unit time point in the current time period, and calculates its average value and standard deviation value as the sensing parameters of the current charging power supply environment of the target electric pile for the charging object.

[0024] The temperature sensor and humidity sensor arranged on the charging gun of the target electric pile sense the temperature and humidity values ​​at the charging interface of the charging object at each unit time point in the current period, and extract the maximum temperature value and the minimum temperature value to construct a temperature range as the perception parameter of the current charging temperature environment of the target electric pile for the charging object. Similarly, the perception parameter of the current charging humidity environment of the target electric pile for the charging object is obtained.

[0025] In summary, the current charging environment of the target charging pile for the charging object is perceived.

[0026] Specifically, the retrieval of various historical reference charging environments relative to the current charging environment of the target electric pile from the historical charging log of the target electric pile includes: extracting the charging environment perception parameters of each unit time period of each historical charging process of the target electric pile recorded in the historical charging log of the target electric pile, including the average input AC voltage value, the input AC voltage standard deviation, the charging temperature range and the charging humidity range, planning the reference conditions of the charging environment of the unit time period in the historical charging process for the current charging environment, thereby extracting each unit time period that meets the current charging environment reference conditions in each historical charging process of the target electric pile, accumulating the duration to obtain the cumulative duration of each historical charging process of the target electric pile that meets the current charging environment reference conditions, retaining each historical charging process with a cumulative duration greater than or equal to the corresponding duration of the current time period, and arbitrarily selecting a preset number of unit time periods that meet the current charging environment reference conditions to form each historical reference charging environment.

[0027] It should be noted that the planning process of the reference conditions of the charging environment per unit time period in the above-mentioned historical charging process for the current charging environment includes: the absolute deviation value of the average input AC voltage value in the charging environment perception parameters per unit time period in the historical charging process of the target electric pile and the average input AC voltage value of the power supply with which the physical connection is established in the current time period monitored and analyzed by the built-in voltage sampling circuit of the target electric pile is less than or equal to the preset input AC voltage deviation threshold, which is used as the reference condition 1 for the charging environment per unit time period in the historical charging process to meet the current charging environment.

[0028] The absolute deviation value of the input AC voltage standard deviation in the charging environment perception parameters of the target charging pile per unit time period in the historical charging process and the input AC voltage standard deviation of the power supply to which the built-in voltage sampling circuit of the target charging pile monitors and analyzes the physical connection in the current period is less than or equal to the preset input AC voltage standard deviation threshold, which is used as the reference condition 2 for the charging environment per unit time period in the historical charging process to meet the current charging environment.

[0029] The upper limit absolute deviation value and the lower limit absolute deviation value of the charging temperature range in the charging environment perception parameters of the target electric pile in the unit time period during the historical charging process and the monitoring temperature range at the charging interface of the charging object in the current time period of the target electric pile are both less than or equal to the preset temperature deviation threshold value, which is used as the reference condition 3 for the charging environment of the unit time period in the historical charging process to meet the current charging environment.

[0030] The upper and lower absolute deviation values ​​of the charging humidity interval in the charging environment perception parameters of the target charging pile in the unit time period during the historical charging process and the monitoring humidity interval at the charging interface of the charging object in the current time period of the target charging pile are both less than or equal to the preset humidity deviation threshold value, which serves as the reference condition 4 for the charging environment of the unit time period in the historical charging process to meet the current charging environment.

[0031] In summary, reference conditions 1, 2, 3, and 4 are used together as reference conditions for the charging environment of a unit period in the historical charging process for the current charging environment.

[0032] Specifically, the evaluation of the charging efficiency reference abnormality of the target charging pile in the current period includes: obtaining the charging deviation Δq corresponding to each unit time point in the current period between the current charging environment and each historical reference charging environment ih , where i is the number of each unit time point in the current period, i = 1, 2, ..., a, h is the number of each historical reference charging environment, h = 1, 2, ..., c, according to the formula The reference abnormality of the charging efficiency of the target charging pile in the current period is obtained, where c is the number of historical reference charging environments.

[0033] S3. Based on the self-comparison abnormality of the charging efficiency of the target electric pile in the current period and the reference abnormality of the charging efficiency, determine whether there is a substantial abnormality in the charging efficiency of the target electric pile for the charging object. If it is determined to be, execute S4.

[0034] Specifically, the method of judging whether there is a substantial abnormality in the current charging efficiency of the target electric pile for the charging object includes: accumulating the self-comparison abnormality and the charging efficiency reference abnormality of the target electric pile in the current time period and multiplying them by their corresponding preset weight products to obtain the comprehensive abnormality of the charging efficiency of the target electric pile in the current time period, performing a ratio analysis with the corresponding duration of the current time period, and further comparing it with a preset warning threshold value for the comprehensive abnormality of the charging efficiency of the electric pile per unit time. If the comparison result is less than, it is judged that there is no substantial abnormality in the current charging efficiency of the target electric pile for the charging object; otherwise, it is judged that there is.

[0035] The embodiment of the present invention adopts two angles, namely, time dimension self-comparison and environmental dimension reference, for the target charging pile to develop the comprehensive abnormality of the charging efficiency of the target charging pile in the current period, and uses this as a basis for judging whether there is a substantial abnormality in the charging efficiency of the target charging pile for the charging object, thereby avoiding the conventional parameter application analysis of the prior art, which can not only improve the use efficiency and safety of the portable charging pile, but also improve the reliability of the overall charging network.

[0036] S4. Trace the actual abnormal reason of the charging efficiency of the target charging pile for the charging object.

[0037] Specifically, the tracing of the actual abnormal reason of the charging efficiency of the target electric pile for the charging object includes: collecting the output DC power supply voltage value V of the built-in rectifier of the target electric pile for the charging object at each unit time point in the current period; i DC And the output DC supply current value I i DC , combined with the input AC voltage value V at each unit time point in the current period of the power supply that has been physically connected to the target electric pile i AC and input AC current value By formula Analyze the conversion efficiency of the built-in rectifier of the target charging pile at each unit time point in the current time period, substitute it into the rectangular coordinate system with time as the horizontal axis and conversion efficiency as the vertical axis, and draw the conversion efficiency change curve of the built-in rectifier of the target charging pile. If the minimum tangent slope is less than the preset tangent warning slope, it means that the performance of the built-in rectifier of the target charging pile in the current period is abnormal. The absolute deviation ratio between the minimum tangent slope and the preset tangent warning slope is used as the abnormal performance evaluation index of the built-in rectifier of the target charging pile in the current period.

[0038] Specifically, the tracing of the actual abnormal reason for the charging efficiency of the target electric pile for the charging object at present also includes: collecting the terminal DC power supply voltage value of the charging object at each unit time point in the current period, calculating the absolute deviation voltage value between the terminal DC power supply voltage value of the charging object and the output DC power supply voltage value of the built-in rectifier of the target electric pile at each unit time point in the current period, and using it as the charging link voltage drop ΔV at each unit time point in the current period of the target electric pile. i .

[0039] Collect the DC power supply current value of each unit time point in the current period at each segment position of the target electric pile charging link Where j is the number of each segment position of the charging link, j = 1, 2, ..., b, according to the formula Calculate the charging link current fluctuation degree of the target charging pile at each unit time point in the current period, where b is the number of charging link segments, They are respectively the maximum and minimum DC supply current values ​​at the i-th unit time point in the current period of the target electric pile charging link segment position.

[0040] By formula Calculate the abnormal coefficient of charging link resistance of the target electric pile in the current period. σ0 and ΔV0 are respectively the reasonable reference thresholds of charging link voltage drop and charging link current fluctuation per unit time of the preset target electric pile. The specific reference is made to the technical specification guide provided by the manufacturer of the target electric pile.

[0041] If β is greater than the preset charging pile charging link resistance abnormality coefficient warning threshold β′, it means that the charging pile charging link resistance is abnormal in the current period. It serves as an evaluation indicator for abnormal resistance consumption of the target charging pile charging link in the current period.

[0042] Specifically, the tracing of the actual abnormal reason of the charging efficiency of the target electric pile for the charging object at present also includes: forming an observation pair with the temperature value and humidity value at the charging interface of the charging object at each unit time point in the current period and the charging amount of the target electric pile for the charging object at each unit time point in the current period, analyzing the correlation coefficients of the charging interface temperature, the charging interface humidity and the charging amount of the target electric pile, respectively denoted as ρ 温 , 湿 , and the compatible correlation coefficient intervals of the temperature environment and humidity environment of the target electric pile stored in the WEB cloud are compared respectively, and the environmental compatibility anomaly coefficient λ of the target electric pile for the charging object in the current period is calculated. If it is greater than the preset electric pile environmental compatibility anomaly coefficient warning threshold λ′, it means that the environmental compatibility of the target electric pile in the current period is abnormal, and the target electric pile will be It serves as an abnormal assessment indicator of the environmental compatibility of the target charging station in the current period.

[0043] It should be noted that the correlation coefficients of the above-mentioned charging interface temperature, charging interface humidity and target charging amount of the charging pile are specifically obtained by the Spearman rank correlation coefficient calculation method.

[0044] It should also be noted that the calculation formula of the above λ is: where ρ′ 温 , ρ′ 湿 are the reference compatibility correlation coefficients of the target electric pile temperature environment and humidity environment, Δρ 温 , Δρ 湿 are the reasonable deviation thresholds of the compatibility correlation coefficients of the target charging pile temperature environment and humidity environment, and e is a natural constant.

[0045] It is worth noting that the above ρ′ 温 , ρ′ 湿 It is obtained by extracting the upper and lower limits of the compatible correlation coefficient interval of the target electric pile temperature environment and humidity environment and calculating the mean, Δρ 温 , Δρ 湿 It is obtained by calculating the difference between the upper limit value of the compatible correlation coefficient range of the target electric charging pile temperature environment and humidity environment and the reference compatible correlation coefficient of its corresponding environment.

[0046] The embodiment of the present invention evaluates the abnormal performance of the built-in rectifier of the target charging pile in the current period, the abnormal resistance of the charging link, and the abnormal environmental compatibility, and traces the actual abnormal cause of the charging efficiency of the benchmark charging pile for the charging object, effectively identifying the specific factors that lead to the decrease in charging efficiency, so that maintenance personnel can quickly find the problem, reduce troubleshooting time and improve maintenance efficiency.

[0047] S5. Feedback the actual abnormal reason of the charging efficiency of the target charging pile for the charging object.

[0048] Specifically, the feedback includes the actual abnormal reasons for the current abnormal charging efficiency of the target charging pile for the charging object, including: arranging the evaluation indicators of the abnormal performance of the built-in rectifier of the target charging pile in the current period, the abnormal charging link resistance, and the abnormal environmental compatibility in sequence according to the numerical value, and displaying them in the form of a pop-up window on the vehicle terminal page of the charging object.

[0049] The embodiment of the present invention displays the evaluation indicators of abnormal performance of the built-in rectifier of the target charging pile, abnormal charging link resistance, and abnormal environmental compatibility in the current period through the charging object vehicle terminal page. Through this real-time and transparent information transmission method, the user's sense of control and trust in the charging process is greatly enhanced.

[0050] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A method for detecting charging data of an electric pile, characterized in that: The method includes: S1. Collect the charging amount of the target electric pile at each unit time point in the current period of the charging object, and evaluate the abnormality of the charging efficiency of the target electric pile in the current period; S2. Sense the current charging environment of the target electric pile for the charging object, retrieve the historical reference charging environment relative to the current charging environment of the target electric pile from the historical charging log of the target electric pile, and evaluate the reference abnormality of the charging efficiency of the target electric pile in the current period according to the charging amount of each unit time point within the same duration of each historical reference charging environment corresponding to the current period; S3. Combine the charging efficiency of the target electric pile in the current period with the self-comparison abnormality and the charging efficiency reference abnormality, and determine whether the charging efficiency of the target electric pile for the charging object is substantially abnormal. If it is determined that there is, execute S4; S4. Trace the actual abnormal reason for the charging efficiency of the target charging pile for the charging object; S5. Feedback the actual abnormal reason of the charging efficiency of the target charging pile for the charging object; The evaluation of the self-comparison abnormality of the charging efficiency of the target electric pile in the current period includes: calculating the charging deviation of the target electric pile for each unit time point in the current period of the charging object and its previous unit time point, if the charging deviation of a certain unit time point and its previous unit time point is lower than the charging amount allowed to be reduced per unit time of the preset electric pile, then marking the unit time point as an abnormal time point, and taking the absolute difference between the charging deviation of the unit time point and its previous unit time point and the charging amount allowed to be reduced per unit time Δq0 of the preset electric pile as the abnormal charging reduction amount of the unit time point, thereby obtaining each abnormal time point in the current period of the target electric pile and its abnormal charging reduction amount and accumulating them, and taking the absolute ratio of the accumulated value to the charging amount allowed to be reduced per unit time of the preset electric pile as the charging efficiency self-comparison abnormality of the target electric pile in the current period; The sensing of the current charging environment of the target electric pile for the charging object comprises: monitoring and analyzing the input AC voltage value of the power supply with which the target electric pile has established physical connection at each unit time point in the current period by a built-in voltage sampling circuit, and calculating the average value and standard deviation thereof as the sensing parameters of the current charging power supply environment of the target electric pile for the charging object; The temperature sensor and humidity sensor arranged at the charging gun of the target electric pile sense the temperature and humidity values ​​at the charging interface of the charging object at each unit time point in the current period, extract the maximum temperature value and the minimum temperature value to construct a temperature interval, which is used as the perception parameter of the charging temperature environment of the target electric pile for the charging object. Similarly, the perception parameter of the charging humidity environment of the target electric pile for the charging object is obtained; In summary, the current charging environment of the target charging pile for the charging object is perceived.

2. The method for detecting charging data of an electric pile according to claim 1, characterized in that: The method of retrieving various historical reference charging environments relative to the current charging environment of the target electric pile from the historical charging log of the target electric pile includes: extracting the charging environment perception parameters of each unit time period during each historical charging process of the target electric pile recorded in the historical charging log of the target electric pile, including the average input AC voltage value, the input AC voltage standard deviation, the charging temperature range and the charging humidity range, planning the reference conditions of the charging environment of the unit time period during the historical charging process for the current charging environment, thereby extracting various unit time periods during each historical charging process of the target electric pile that meet the reference conditions of the current charging environment, accumulating the durations thereof to obtain the cumulative durations of various historical charging processes of the target electric pile that meet the reference conditions of the current charging environment, retaining various historical charging processes whose cumulative durations are greater than or equal to the corresponding duration of the current time period, and arbitrarily selecting a preset number of unit time periods that meet the reference conditions of the current charging environment to form various historical reference charging environments.

3. The method for detecting charging data of an electric pile according to claim 1, characterized in that: The evaluation of the charging efficiency reference abnormality of the target charging pile in the current period includes: obtaining the charging deviation Δq of the current charging environment and each historical reference charging environment corresponding to each unit time point in the current period ih , where i is the number of each unit time point in the current period, i = 1, 2, ..., a, h is the number of each historical reference charging environment, h = 1, 2, ..., c, according to the formula The reference abnormality of the charging efficiency of the target charging pile in the current period is obtained, where c is the number of historical reference charging environments.

4. The method for detecting charging data of an electric pile according to claim 3, characterized in that: The determining whether there is a substantial abnormality in the current charging efficiency of the target electric pile for the charging object comprises: accumulating the self-comparison abnormality degree and the charging efficiency reference abnormality degree of the target electric pile in the current time period and multiplying them by their corresponding preset weight products respectively to obtain the comprehensive abnormality degree of the charging efficiency of the target electric pile in the current time period, performing a ratio analysis with the corresponding duration of the current time period, and further comparing it with a preset warning threshold value for the comprehensive abnormality degree of the charging efficiency of the electric pile per unit time; if the comparison result is less than, it is determined that there is no substantial abnormality in the current charging efficiency of the target electric pile for the charging object; otherwise, it is determined that there is.

5. The method for detecting charging data of an electric pile according to claim 3, characterized in that: The tracing back of the actual abnormal reason of the charging efficiency of the target electric pile for the charging object includes: collecting the output DC power supply voltage value V of the built-in rectifier of the target electric pile for the charging object at each unit time point in the current period i DC and output DC supply current value Combined with the input AC voltage value V at each unit time point in the current period of the power supply that has been physically connected to the target electric pile i AC and input AC current value By formula Analyze the conversion efficiency of the built-in rectifier of the target charging pile at each unit time point in the current time period, substitute it into the rectangular coordinate system with time as the horizontal axis and conversion efficiency as the vertical axis, and draw the conversion efficiency change curve of the built-in rectifier of the target charging pile. If the minimum tangent slope is less than the preset tangent warning slope, it means that the performance of the built-in rectifier of the target charging pile in the current period is abnormal. The absolute deviation ratio between the minimum tangent slope and the preset tangent warning slope is used as the abnormal performance evaluation index of the built-in rectifier of the target charging pile in the current period.

6. The method for detecting charging data of an electric pile according to claim 5, characterized in that: The tracing of the actual abnormal reason of the charging efficiency of the target electric pile for the charging object at present also includes: collecting the terminal DC power supply voltage value of the charging object at each unit time point in the current period, calculating the absolute deviation voltage value between the terminal DC power supply voltage value of the charging object and the output DC power supply voltage value of the built-in rectifier of the target electric pile at each unit time point in the current period, as the charging link voltage drop ΔV at each unit time point in the current period of the target electric pile i ; Collect the DC power supply current value of each unit time point in the current period at each segment position of the target electric pile charging link Where j is the number of each segment position of the charging link, j = 1, 2, ..., b, according to the formula Calculate the charging link current fluctuation degree of the target charging pile at each unit time point in the current period, where b is the number of charging link segments, are the maximum and minimum DC power supply current values ​​at the i-th unit time point in the current period of the target charging pile charging link segment location respectively; By formula Calculate the abnormal coefficient of charging link resistance of the target electric pile in the current period, σ0 and ΔV0 are the reasonable reference thresholds of the charging link voltage drop and charging link current fluctuation per unit time of the preset target electric pile respectively; If β is greater than the preset charging pile charging link resistance abnormality coefficient warning threshold β′, it means that the charging pile charging link resistance is abnormal in the current period. It serves as an evaluation indicator for abnormal resistance consumption of the target charging pile charging link in the current period.

7. The method for detecting charging data of an electric pile according to claim 6, characterized in that: The method of tracing the actual abnormal reason of the current charging efficiency of the target electric pile for the charging object also includes: forming an observation pair with the temperature value and humidity value at the charging interface of the charging object at each unit time point in the current period, and the charging amount of the target electric pile for the charging object at each unit time point in the current period, analyzing the correlation coefficient between the charging interface temperature, the charging interface humidity and the charging amount of the target electric pile, and comparing them with the compatible correlation coefficient intervals of the temperature environment and the humidity environment of the target electric pile stored in the WEB cloud, respectively, and calculating the environmental compatibility abnormality coefficient λ of the target electric pile for the charging object in the current period. If it is greater than the preset electric pile environmental compatibility abnormality coefficient warning threshold λ′, it means that the environmental compatibility of the target electric pile in the current period is abnormal, and It serves as an abnormal assessment indicator of the environmental compatibility of the target charging station in the current period.

8. The method for detecting charging data of an electric pile according to claim 7, characterized in that: The feedback provides the actual reasons for abnormal charging efficiency of the target charging pile for the charging object, including: arranging the evaluation indicators of abnormal performance of the built-in rectifier of the target charging pile in the current period, abnormal charging link resistance, and abnormal environmental compatibility in sequence according to the numerical value, and displaying them in the form of a pop-up window on the vehicle terminal page of the charging object.

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