Fault detection method and system for integrated double-gun direct current charging pile

Abstract

The invention discloses a fault detection method and system for an integrated double-gun direct current charging pile, and relates to the technical field of charging pile fault detection, and the method comprises the steps: obtaining a real-time order of the integrated double-gun direct current charging pile, and carrying out the analysis and processing of the real-time order of the integrated double-gun direct current charging pile based on a fault analysis terminal. According to the method, the historical order of the integrated double-gun direct current charging pile is analyzed to determine the historical change curve of the charging current, and then the real-time order of the integrated double-gun direct current charging pile is analyzed to determine the real-time change curve of the charging current. The charging current real-time change curve and the charging current historical change curve are calculated and analyzed, the average current change quantity is determined, finally, the average current change quantity is judged, whether the integrated double-gun direct current charging pile has the overcurrent phenomenon or not is determined, the situation that the integrated double-gun direct current charging pile breaks down in the charging process is avoided, and the charging efficiency is improved. The spontaneous combustion condition is avoided, and the property loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of charging pile fault detection, and in particular to a fault detection method and system for an integrated dual-gun DC charging pile. Background Art

[0002] A charging pile refers to a charging device that provides charging services for electric vehicles.

[0003] Charging piles are mainly divided into floor-standing charging piles and wall-mounted charging piles, which mainly adopt the charging methods of time, electricity meter and amount meter. Charging piles can be fixed on the ground or wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations, and can charge various types of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Most charging piles are public charging piles, which generally provide two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile to perform corresponding charging methods, charging time, and cost data printing. The charging pile display can display data such as charging amount, cost, and charging time.

[0004] A charging pile may malfunction when charging a charging device. If the malfunctioning charging pile continues to charge the charging device, the charging pile may be damaged or even spontaneously combust, causing a fire and resulting in a certain degree of property loss. Summary of the invention

[0005] In order to solve the above technical problems, a fault detection method and system for an integrated dual-gun DC charging pile are provided. This technical solution solves the problem that the charging pile proposed in the above background technology may fail when charging the charging device. If the faulty charging pile continues to charge the charging device, the charging pile may be damaged or even spontaneously combust, thereby causing a fire and causing a certain degree of property loss.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: A fault detection method for an integrated dual-gun DC charging pile, comprising: Obtaining real-time orders for integrated dual-gun DC charging piles, analyzing and processing the real-time orders for integrated dual-gun DC charging piles based on the fault analysis terminal, and obtaining relevant data of the charging equipment, wherein the relevant data of the charging equipment includes the type of battery and the output power of the battery; Obtain the historical orders of the integrated dual-gun DC charging pile. Based on the fault analysis terminal, analyze and process the relevant data of the charging equipment and the historical orders of the integrated dual-gun DC charging pile to obtain the historical change curve of the charging current. Based on the fault analysis terminal, the real-time orders and charging current history change curves of the integrated dual-gun DC charging pile are analyzed and processed to determine the average current change; Based on the fault analysis terminal, the average current change and the set current change threshold are compared and judged to determine the real-time status of the integrated dual-gun DC charging pile.

[0007] Preferably, the real-time order of the integrated dual-gun DC charging pile is obtained, based on the fault analysis terminal, the real-time order of the integrated dual-gun DC charging pile is analyzed and processed, and the relevant data of the charging device is obtained, which specifically includes the following steps: Based on the fault analysis terminal, the charging platform of the integrated dual-gun DC charging pile is read and processed to obtain the real-time order of the integrated dual-gun DC charging pile; Based on the fault analysis terminal, the real-time order information of the integrated dual-gun DC charging pile is extracted and processed to obtain the type of charging equipment; The fault analysis terminal performs information retrieval processing on the database based on the type of charging equipment as a feature, and obtains the type of battery and the output power of the battery.

[0008] Preferably, the obtaining of the historical orders of the integrated dual-gun DC charging pile comprises the following steps: analyzing and processing the relevant data of the charging device and the historical orders of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining the charging current historical change curve: Based on the fault analysis terminal, data is extracted from the database to obtain historical orders for integrated dual-gun DC charging piles; The fault analysis terminal uses the relevant data of the charging equipment as features to perform order matching on the historical orders of the integrated dual-gun DC charging piles and determine similar historical orders; Based on the fault analysis terminal, similar historical orders are analyzed and processed to obtain the historical change curve of the charging current.

[0009] Preferably, the fault analysis terminal performs order matching processing on historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging device, and determining similar historical orders specifically includes the following steps: The fault analysis terminal performs a first information matching process on the historical orders of the integrated dual-gun DC charging pile based on the type of the charging device, and determines a first matching historical order set; The fault analysis terminal performs a second information matching process on the first matching historical order set based on the type of the battery as a feature to determine a second matching historical order set; The fault analysis terminal performs a third information matching process on the second matching historical order set based on the output power of the battery, and determines similar historical orders.

[0010] Preferably, the specific calculation formula for determining similar historical orders is: ; In the formula, is the first matching historical order set; The type of charging device; Historical orders for integrated dual-gun DC charging piles; The second matching historical order set; is the type of battery; For similar historical orders; is the output power of the battery.

[0011] Preferably, the method of analyzing and processing similar historical orders based on the fault analysis terminal to obtain the charging current historical change curve specifically includes the following steps: The fault analysis terminal performs data retrieval processing on the database based on similar historical orders as features, and determines the historical operation data of the integrated dual-gun DC charging pile corresponding to the similar historical orders; Based on the fault analysis terminal, feature extraction and processing are performed on the historical operation data of the integrated dual-gun DC charging pile to obtain the historical current change data and historical charging time of the integrated dual-gun DC charging pile; The fault analysis terminal constructs a rectangular coordinate system, wherein the X-axis parameter of the rectangular coordinate system is the charging time, and the Y-axis parameter of the rectangular coordinate system is the current historical change data; The fault analysis terminal draws a curve in a rectangular coordinate system according to the historical current change data and historical charging time of the integrated dual-gun DC charging pile to obtain the charging current historical change curve.

[0012] Preferably, the method of analyzing and processing the real-time order and charging current history change curve of the integrated dual-gun DC charging pile based on the fault analysis terminal to determine the average current change specifically includes the following steps: Based on the fault analysis terminal, the real-time order information of the integrated dual-gun DC charging pile is extracted and processed to obtain the charging time of the integrated dual-gun DC charging pile; The fault analysis terminal uses the real-time order of the integrated dual-gun DC charging pile as a feature to extract the feature of the charging platform of the integrated dual-gun DC charging pile, and obtains the real-time current change data of the integrated dual-gun DC charging pile; The fault analysis terminal draws a curve in a rectangular coordinate system based on the charging time of the integrated dual-gun DC charging pile and the real-time change data of the current of the integrated dual-gun DC charging pile, and obtains the real-time change curve of the charging current; Based on the fault analysis terminal, the real-time change curve of the charging current and the historical change curve of the charging current are analyzed and processed to determine the average change amount of the current.

[0013] Preferably, the method of analyzing and processing the real-time change curve of the charging current and the historical change curve of the charging current based on the fault analysis terminal to determine the average change amount of the current specifically includes the following steps: The fault analysis terminal intercepts and processes the charging current history change curve based on the charging time of the integrated dual-gun DC charging pile, and obtains part of the charging current history change curve; Based on the fault analysis terminal, a difference calculation is performed on some charging current historical change curves and the charging current real-time change curves to obtain several groups of charging current difference values; Based on the fault analysis terminal, several groups of charging current differences are calculated and processed to obtain the average current change; The specific calculation formula for obtaining the average change in current is: ; In the formula, is the average change of current; is the charging current difference; n is the specific number of several groups of charging current differences.

[0014] Preferably, the fault analysis terminal is used to compare and judge the average current change amount and the set current change threshold to determine the real-time status of the integrated dual-gun DC charging pile, which specifically includes the following steps: Based on the fault analysis terminal, the average current change and the set current change threshold are judged and processed; If the average current change is greater than or equal to the set current change threshold, there is an overcurrent phenomenon when the integrated dual-gun DC charging pile is charging, and the charging state of the integrated dual-gun DC charging pile is abnormal. The fault analysis terminal sends the integrated dual-gun DC charging pile abnormal information to the maintenance personnel; If the average current change is less than the set current change threshold, the charging status of the integrated dual-gun DC charging pile is normal.

[0015] Furthermore, a fault detection system for an integrated dual-gun DC charging pile is proposed, which is used to implement a fault detection method for an integrated dual-gun DC charging pile as described above, including: A fault analysis terminal, which performs charging current analysis on the real-time order of the integrated dual-gun DC charging pile and the historical order of the integrated dual-gun DC charging pile to determine the real-time status of the integrated dual-gun DC charging pile. The fault analysis terminal is used to control data transmission and information interaction between various modules; A database for storing battery types, battery output power, historical orders for integrated dual-gun DC charging piles, and historical operating data of integrated dual-gun DC charging piles; A charging platform, which is used to store real-time orders for integrated dual-gun DC charging piles; An information matching module, wherein the information matching module performs information retrieval processing on the database based on the type of charging equipment as a feature to obtain the type of battery and the output power of the battery; the information matching module performs order matching processing on the historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging equipment as a feature to determine similar historical orders; A coordinate system building module, wherein the coordinate system building module builds a rectangular coordinate system based on charging duration and current history change data; A curve drawing module, wherein the curve drawing module draws curves in a rectangular coordinate system according to the current historical change data, the historical charging time, the charging time of the integrated dual-gun DC charging pile, and the current real-time change data of the integrated dual-gun DC charging pile, respectively, to obtain a charging current historical change curve and a charging current real-time change curve; A data analysis module, which analyzes and calculates the charging current historical change curve and the charging current real-time change curve to determine the average current change; The state judgment module compares and judges the average current change and the set current change threshold to determine the real-time state of the integrated dual-gun DC charging pile.

[0016] Compared with the prior art, the present invention provides a fault detection method and system for an integrated dual-gun DC charging pile, which has the following beneficial effects: The present invention firstly analyzes the historical orders of the integrated dual-gun DC charging pile to determine the charging current historical change curve, then analyzes the real-time orders of the integrated dual-gun DC charging pile to determine the charging current real-time change curve, then calculates and analyzes the charging current real-time change curve and the charging current historical change curve to determine the average current change, and finally judges the average current change to determine whether the integrated dual-gun DC charging pile has an overcurrent phenomenon, thereby avoiding failure of the integrated dual-gun DC charging pile during the charging process, avoiding spontaneous combustion, and reducing property losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of steps S100-S400 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 2This is a flow chart of steps S101-S103 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 3 This is a flow chart of steps S201-S203 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 4 A flowchart of steps S2021-S2023 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 5 This is a flow chart of steps S2031-S2034 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 6 This is a flow chart of steps S301-S304 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 7 This is a flow chart of steps S3041-S3043 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Figure 8 This is a flow chart of steps S401-S403 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention; Fig. 9 This is a structural block diagram of a fault detection system for an integrated dual-gun DC charging pile proposed by the present invention. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0019] Reference Figure 1 As shown, a fault detection method for an integrated dual-gun DC charging pile includes: S100, obtaining a real-time order of an integrated dual-gun DC charging pile, analyzing and processing the real-time order of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining relevant data of the charging device, wherein the relevant data of the charging device includes a battery type and a battery output power; S200, obtaining historical orders of the integrated dual-gun DC charging pile, analyzing and processing relevant data of the charging device and historical orders of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining a charging current historical change curve; S300, based on the fault analysis terminal, analyzing and processing the real-time order and charging current history change curve of the integrated dual-gun DC charging pile to determine the average current change; S400, based on the fault analysis terminal, compare and judge the average current change and the set current change threshold to determine the real-time status of the integrated dual-gun DC charging pile; It is understandable to those skilled in the art that when the integrated dual-gun DC charging pile is charging the charging device, overcurrent may occur, and overcurrent will cause the temperature inside the integrated dual-gun DC charging pile to rise. When the temperature is too high, the wires inside the integrated dual-gun DC charging pile may be damaged, and then the integrated dual-gun DC charging pile may be damaged. When the temperature is too high, it may even cause the integrated dual-gun DC charging pile to spontaneously combust, thereby causing a fire and causing a certain degree of property loss. Therefore, by analyzing the charging current of the integrated dual-gun DC charging pile, it is determined whether the integrated dual-gun DC charging pile has an overcurrent situation, thereby avoiding damage to the integrated dual-gun DC charging pile and reducing property losses.

[0020] Reference Figure 2 As shown, obtaining the real-time order of the integrated dual-gun DC charging pile, analyzing and processing the real-time order of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining the relevant data of the charging equipment specifically includes the following steps: S101. Based on the fault analysis terminal, data reading and processing are performed on the charging platform of the integrated dual-gun DC charging pile to obtain a real-time order of the integrated dual-gun DC charging pile; S102: Based on the fault analysis terminal, extract and process the real-time order information of the integrated dual-gun DC charging pile to obtain the type of charging equipment; S103, the fault analysis terminal performs information retrieval processing on the database based on the type of charging equipment as a feature, and obtains the type of battery and the output power of the battery; In this embodiment, with the development of technology, the battery type and battery output power of the same type of charging equipment may change. For example, the battery model of a certain brand of new energy vehicles 23 and 24 may change, so the battery output power will also change accordingly. In addition, the same type of new energy vehicles in different years may increase or decrease the number of batteries, so the battery output power will also change. Therefore, it is necessary to determine the battery type and battery output power.

[0021] Reference Figure 3 As shown, obtaining the historical orders of the integrated dual-gun DC charging pile, analyzing and processing the relevant data of the charging equipment and the historical orders of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining the charging current historical change curve specifically includes the following steps: S201. Based on the fault analysis terminal, extract data from the database to obtain historical orders for the integrated dual-gun DC charging pile; S202, the fault analysis terminal performs order matching processing on historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging device, and determines similar historical orders; S203: Based on the fault analysis terminal, similar historical orders are analyzed and processed to obtain a charging current historical change curve.

[0022] Reference Figure 4 As shown, the fault analysis terminal performs order matching processing on the historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging equipment, and determines the similar historical orders, which specifically includes the following steps: S2021. The fault analysis terminal performs a first information matching process on the historical orders of the integrated dual-gun DC charging pile based on the type of the charging device, and determines a first matching historical order set; S2022. The fault analysis terminal performs a second information matching process on the first matching historical order set based on the type of the battery as a feature to determine a second matching historical order set; S2023. The fault analysis terminal performs a third information matching process on the second matching historical order set based on the output power of the battery, and determines similar historical orders. Among them, the specific calculation formula for determining similar historical orders is: ; In the formula, is the first matching historical order set; The type of charging device; Historical orders for integrated dual-gun DC charging piles; The second matching historical order set; is the type of battery; For similar historical orders; is the output power of the battery; In this embodiment, in order to accurately detect whether the integrated dual-gun DC charging pile has overcurrent, it is necessary to monitor the charging current of the charging device. Therefore, the historical orders of the integrated dual-gun DC charging pile are screened by the type of charging device, the type of battery and the output power of the battery to obtain the same historical orders as the charging device being charged. Because the same historical orders and the charging device being charged have the same battery and the same battery output power, the charging current has the same change pattern when the charging device is charging. By comparing the historical orders of the integrated dual-gun DC charging pile with the real-time orders of the integrated dual-gun DC charging pile, it is determined whether the integrated dual-gun DC charging pile has overcurrent.

[0023] Reference Figure 5 As shown, based on the fault analysis terminal, similar historical orders are analyzed and processed to obtain the charging current historical change curve, which specifically includes the following steps: S2031. The fault analysis terminal performs data retrieval processing on the database based on similar historical orders as features, and determines the historical operation data of the integrated dual-gun DC charging pile corresponding to the similar historical orders; S2032. Based on the fault analysis terminal, feature extraction is performed on the historical operation data of the integrated dual-gun DC charging pile to obtain the historical current change data and historical charging time of the integrated dual-gun DC charging pile; S2033. The fault analysis terminal constructs a rectangular coordinate system, wherein an X-axis parameter of the rectangular coordinate system is charging time, and a Y-axis parameter of the rectangular coordinate system is current historical change data; S2034. The fault analysis terminal draws a curve in a rectangular coordinate system according to the historical current change data and the historical charging time of the integrated dual-gun DC charging pile to obtain a charging current historical change curve.

[0024] Reference Figure 6 As shown, based on the fault analysis terminal, the real-time order and charging current history change curve of the integrated dual-gun DC charging pile are analyzed and processed to determine the average current change, which specifically includes the following steps: S301. Based on the fault analysis terminal, extract information from the real-time order of the integrated dual-gun DC charging pile to obtain the charging time of the integrated dual-gun DC charging pile; S302, the fault analysis terminal performs feature extraction processing on the charging platform of the integrated dual-gun DC charging pile based on the real-time order of the integrated dual-gun DC charging pile, and obtains the real-time change data of the current of the integrated dual-gun DC charging pile; S303, the fault analysis terminal draws a curve in a rectangular coordinate system based on the charging time of the integrated dual-gun DC charging pile and the real-time change data of the current of the integrated dual-gun DC charging pile as features to obtain a real-time change curve of the charging current; S304, based on the fault analysis terminal, analyzing and processing the real-time change curve of the charging current and the historical change curve of the charging current to determine the average change amount of the current; In this embodiment, the average current change is calculated to filter out abnormal current values ​​at a certain moment, thereby avoiding misjudgment of the operating state of the integrated dual-gun DC charging pile and improving the subsequent analysis accuracy.

[0025] Reference Figure 7 As shown, based on the fault analysis terminal, the real-time change curve of the charging current and the historical change curve of the charging current are analyzed and processed to determine the average change amount of the current, which specifically includes the following steps: S3041. The fault analysis terminal intercepts and processes the charging current history change curve based on the charging time of the integrated dual-gun DC charging pile, and obtains part of the charging current history change curve; S3042. Based on the fault analysis terminal, performing difference calculation on some charging current historical change curves and the charging current real-time change curves to obtain several groups of charging current difference values; S3043, based on the fault analysis terminal, calculating and processing the difference values ​​of several groups of charging currents to obtain an average change amount of the current; The specific calculation formula for obtaining the average change in current is: ; In the formula, is the average change of current; is the charging current difference; n is the specific number of several groups of charging current differences; In this embodiment, the real-time order of the integrated dual-gun DC charging pile is the electric energy charged to the charging device for a period of time, and the charging current history change curve is a complete charging process. Therefore, in order to improve the accuracy of the subsequent analysis results, the charging current history change curve is intercepted by the charging time of the integrated dual-gun DC charging pile, so that part of the charging current history change curve and the charging current real-time change curve have the same time interval. Therefore, the charging current at each moment in the partial charging current history change curve and the charging current real-time change curve is calculated to obtain several groups of charging current difference values. Finally, for several groups of charging currents, the charging current difference value is calculated. The current difference is calculated and processed to obtain the average current change. When the integrated dual-gun DC charging pile has overcurrent, the current changes over a period of time. Therefore, the average calculation of several groups of charging current differences avoids the use of the current value at a certain moment for judgment and error. Because the integrated dual-gun DC charging pile may have current changes at a certain moment when charging, but the current value meets the characteristics of overcurrent, but the value only appears at a certain moment and does not change continuously, so it is not overcurrent. Therefore, by averaging several groups of charging current differences, the abnormal current value at a certain moment can be screened out.

[0026] Reference Figure 8 As shown, based on the fault analysis terminal, the average current change and the set current change threshold are compared and judged to determine the real-time status of the integrated dual-gun DC charging pile, which specifically includes the following steps: S401, based on the fault analysis terminal, judging and processing the average current change and the set current change threshold; S402: If the average current change is greater than or equal to the set current change threshold, there is an overcurrent phenomenon when the integrated dual-gun DC charging pile is charging, and the charging state of the integrated dual-gun DC charging pile is abnormal. The fault analysis terminal sends abnormal information of the integrated dual-gun DC charging pile to the maintenance personnel; S403: If the average current change is less than the set current change threshold, the charging status of the integrated dual-gun DC charging pile is normal.

[0027] Reference Fig. 9 As shown, a fault detection system for an integrated dual-gun DC charging pile is used to implement a fault detection method for an integrated dual-gun DC charging pile as described above, comprising: A fault analysis terminal, which performs charging current analysis on the real-time order of the integrated dual-gun DC charging pile and the historical order of the integrated dual-gun DC charging pile to determine the real-time status of the integrated dual-gun DC charging pile. The fault analysis terminal is used to control data transmission and information interaction between various modules; A database for storing battery types, battery output power, historical orders for integrated dual-gun DC charging piles, and historical operating data of integrated dual-gun DC charging piles; A charging platform, which is used to store real-time orders for integrated dual-gun DC charging piles; An information matching module, wherein the information matching module performs information retrieval processing on the database based on the type of charging equipment as a feature to obtain the type of battery and the output power of the battery; the information matching module performs order matching processing on the historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging equipment as a feature to determine similar historical orders; A coordinate system building module, wherein the coordinate system building module builds a rectangular coordinate system based on charging duration and current history change data; A curve drawing module, wherein the curve drawing module draws curves in a rectangular coordinate system according to the current historical change data, the historical charging time, the charging time of the integrated dual-gun DC charging pile, and the current real-time change data of the integrated dual-gun DC charging pile, respectively, to obtain a charging current historical change curve and a charging current real-time change curve; A data analysis module, which analyzes and calculates the charging current historical change curve and the charging current real-time change curve to determine the average current change; The state judgment module compares and judges the average current change and the set current change threshold to determine the real-time state of the integrated dual-gun DC charging pile.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A fault detection method for an integrated dual-gun DC charging pile, characterized in that: include: Obtaining real-time orders for integrated dual-gun DC charging piles, analyzing and processing the real-time orders for integrated dual-gun DC charging piles based on the fault analysis terminal, and obtaining relevant data of the charging equipment, wherein the relevant data of the charging equipment includes the type of battery and the output power of the battery; Obtain the historical orders of the integrated dual-gun DC charging pile. Based on the fault analysis terminal, analyze and process the relevant data of the charging equipment and the historical orders of the integrated dual-gun DC charging pile to obtain the historical change curve of the charging current. Based on the fault analysis terminal, the real-time orders and charging current history change curves of the integrated dual-gun DC charging pile are analyzed and processed to determine the average current change; Based on the fault analysis terminal, the average current change and the set current change threshold are compared and judged to determine the real-time status of the integrated dual-gun DC charging pile.

2. A fault detection method for an integrated dual-gun DC charging pile according to claim 1, characterized in that: The method of obtaining the real-time order of the integrated dual-gun DC charging pile, analyzing and processing the real-time order of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining the relevant data of the charging device specifically includes the following steps: Based on the fault analysis terminal, the charging platform of the integrated dual-gun DC charging pile is read and processed to obtain the real-time order of the integrated dual-gun DC charging pile; Based on the fault analysis terminal, the real-time order information of the integrated dual-gun DC charging pile is extracted and processed to obtain the type of charging equipment; The fault analysis terminal performs information retrieval processing on the database based on the type of charging equipment, and obtains the type of battery and the output power of the battery.

3. The fault detection method of an integrated dual-gun DC charging pile according to claim 1 is characterized in that: The method of obtaining the historical orders of the integrated dual-gun DC charging pile, analyzing and processing the relevant data of the charging device and the historical orders of the integrated dual-gun DC charging pile based on the fault analysis terminal, and obtaining the charging current historical change curve specifically includes the following steps: Based on the fault analysis terminal, data is extracted from the database to obtain historical orders for integrated dual-gun DC charging piles; The fault analysis terminal uses the relevant data of the charging equipment as features to perform order matching on the historical orders of the integrated dual-gun DC charging piles and determine similar historical orders; Based on the fault analysis terminal, similar historical orders are analyzed and processed to obtain the historical change curve of the charging current.

4. The fault detection method of an integrated dual-gun DC charging pile according to claim 3 is characterized in that: The fault analysis terminal performs order matching processing on historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging device as a feature, and determining similar historical orders specifically includes the following steps: The fault analysis terminal performs a first information matching process on the historical orders of the integrated dual-gun DC charging pile based on the type of the charging device, and determines a first matching historical order set; The fault analysis terminal performs a second information matching process on the first matching historical order set based on the type of the battery as a feature to determine a second matching historical order set; The fault analysis terminal performs a third information matching process on the second matching historical order set based on the output power of the battery, and determines similar historical orders.

5. The fault detection method of an integrated dual-gun DC charging pile according to claim 4 is characterized in that: The specific calculation formula for determining similar historical orders is: ; In the formula, is the first matching historical order set; The type of charging device; Historical orders for integrated dual-gun DC charging piles; The second matching historical order set; is the type of battery; For similar historical orders; is the output power of the battery.

6. The fault detection method of an integrated dual-gun DC charging pile according to claim 3 is characterized in that: The method of analyzing and processing similar historical orders based on the fault analysis terminal to obtain the charging current historical change curve specifically includes the following steps: The fault analysis terminal performs data retrieval processing on the database based on similar historical orders as features, and determines the historical operation data of the integrated dual-gun DC charging pile corresponding to the similar historical orders; Based on the fault analysis terminal, feature extraction and processing are performed on the historical operation data of the integrated dual-gun DC charging pile to obtain the historical current change data and historical charging time of the integrated dual-gun DC charging pile; The fault analysis terminal constructs a rectangular coordinate system, wherein the X-axis parameter of the rectangular coordinate system is the charging time, and the Y-axis parameter of the rectangular coordinate system is the current historical change data; The fault analysis terminal draws a curve in a rectangular coordinate system according to the historical current change data and historical charging time of the integrated dual-gun DC charging pile to obtain the charging current historical change curve.

7. The fault detection method of an integrated dual-gun DC charging pile according to claim 1, characterized in that: The method of analyzing and processing the real-time order and charging current history change curve of the integrated dual-gun DC charging pile based on the fault analysis terminal to determine the average current change specifically includes the following steps: Based on the fault analysis terminal, the real-time order information of the integrated dual-gun DC charging pile is extracted and processed to obtain the charging time of the integrated dual-gun DC charging pile; The fault analysis terminal uses the real-time order of the integrated dual-gun DC charging pile as a feature to extract the feature of the charging platform of the integrated dual-gun DC charging pile, and obtains the real-time current change data of the integrated dual-gun DC charging pile; The fault analysis terminal draws a curve in a rectangular coordinate system based on the charging time of the integrated dual-gun DC charging pile and the real-time change data of the current of the integrated dual-gun DC charging pile, and obtains the real-time change curve of the charging current; Based on the fault analysis terminal, the real-time change curve of the charging current and the historical change curve of the charging current are analyzed and processed to determine the average change of the current.

8. The fault detection method of an integrated dual-gun DC charging pile according to claim 7, characterized in that: The method of analyzing and processing the real-time charging current change curve and the historical charging current change curve based on the fault analysis terminal to determine the average current change specifically includes the following steps: The fault analysis terminal intercepts and processes the charging current history change curve based on the charging time of the integrated dual-gun DC charging pile, and obtains part of the charging current history change curve; Based on the fault analysis terminal, a difference calculation is performed on some charging current historical change curves and the charging current real-time change curves to obtain several groups of charging current difference values; Based on the fault analysis terminal, several groups of charging current differences are calculated and processed to obtain the average current change; The specific calculation formula for obtaining the average change in current is: ; In the formula, is the average change of current; is the charging current difference; n is the specific number of several groups of charging current differences.

9. The fault detection method of an integrated dual-gun DC charging pile according to claim 1, characterized in that: The method of comparing and judging the average current change amount and the set current change threshold based on the fault analysis terminal to determine the real-time status of the integrated dual-gun DC charging pile specifically includes the following steps: Based on the fault analysis terminal, the average current change and the set current change threshold are judged and processed; If the average current change is greater than or equal to the set current change threshold, there is an overcurrent phenomenon when the integrated dual-gun DC charging pile is charging, and the charging state of the integrated dual-gun DC charging pile is abnormal. The fault analysis terminal sends the integrated dual-gun DC charging pile abnormal information to the maintenance personnel; If the average current change is less than the set current change threshold, the charging status of the integrated dual-gun DC charging pile is normal.

10. A fault detection system for an integrated dual-gun DC charging pile, used to implement a fault detection method for an integrated dual-gun DC charging pile as described in any one of claims 1 to 9, characterized in that: include: A fault analysis terminal, which performs charging current analysis on the real-time order of the integrated dual-gun DC charging pile and the historical order of the integrated dual-gun DC charging pile to determine the real-time status of the integrated dual-gun DC charging pile. The fault analysis terminal is used to control data transmission and information interaction between various modules; A database for storing battery types, battery output power, historical orders for integrated dual-gun DC charging piles, and historical operating data of integrated dual-gun DC charging piles; A charging platform, which is used to store real-time orders for integrated dual-gun DC charging piles; An information matching module, wherein the information matching module performs information retrieval processing on the database based on the type of charging equipment as a feature to obtain the type of battery and the output power of the battery; the information matching module performs order matching processing on the historical orders of the integrated dual-gun DC charging pile based on the relevant data of the charging equipment as a feature to determine similar historical orders; A coordinate system building module, wherein the coordinate system building module builds a rectangular coordinate system based on charging duration and current history change data; A curve drawing module, wherein the curve drawing module draws curves in a rectangular coordinate system according to the current historical change data, the historical charging time, the charging time of the integrated dual-gun DC charging pile, and the current real-time change data of the integrated dual-gun DC charging pile, respectively, to obtain a charging current historical change curve and a charging current real-time change curve; A data analysis module, which analyzes and calculates the charging current historical change curve and the charging current real-time change curve to determine the average current change; The state judgment module compares and judges the average current change and the set current change threshold to determine the real-time state of the integrated dual-gun DC charging pile.

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