Fault Detection Method and System for an Integrated Dual-Gun DC Charging Pile

Abstract

The present invention discloses a fault detection method and system for an integrated dual-gun DC charging pile, which relates to the technical field of charging pile fault detection, and includes obtaining the real-time order of the integrated dual-gun DC charging pile and analyzing and processing the real-time order of the integrated dual-gun DC charging pile based on a fault analysis terminal. First, the present invention analyzes the historical order of the integrated dual-gun DC charging pile to determine the historical change curve of the charging current. Then, it analyzes the real-time order of the integrated dual-gun DC charging pile to determine the real-time change curve of the charging current. Next, it calculates and analyzes the real-time change curve of the charging current and the historical change curve of the charging current to determine the average current change amount. Finally, it judges the average current change amount to determine whether there is an overcurrent phenomenon in the integrated dual-gun DC charging pile, avoiding faults in the integrated dual-gun DC charging pile during the charging process, preventing spontaneous combustion, and reducing property losses.

Description

Technical Field

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

[0002] A charging pile is an energy charging device that provides charging services for electric vehicles.

[0003] Charging piles are mainly divided into floor-mounted charging piles and wall-mounted charging piles, and mainly adopt charging methods based on time, electricity consumption, and amount. Charging piles can be fixed on the ground or on the wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential community parking lots or charging stations, and can charge various models 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, generally providing two charging methods: regular charging and fast charging. People can use a specific charging card to swipe on the man-machine interaction operation interface provided by the charging pile to perform operations such as corresponding charging methods, charging time, and cost data printing. The display screen of the charging pile can display data such as the charging amount, cost, and charging time.

[0004] When the charging pile charges the charging device, a fault may occur. If the faulty charging pile continues to charge the charging device, the charging pile may be damaged, or even catch fire, thus causing a certain degree of property loss. Summary of the Invention

[0005] To solve the above technical problems, a fault detection method and system for an integrated dual-gun DC charging pile are provided. The present technical solution solves the problem that when the charging pile charges the charging device, a fault may occur. If the faulty charging pile continues to charge the charging device, the charging pile may be damaged, or even catch fire, thus causing a certain degree of property loss as mentioned in the above background art.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A fault detection method for an integrated dual-gun DC charging pile, comprising:

[0008] Obtain the real-time order of the integrated dual-gun DC charging pile, and based on the fault analysis terminal, analyze and process the real-time order of the integrated dual-gun DC charging pile to obtain the relevant data of the charging device, wherein the relevant data of the charging device includes the type of the battery and the output power of the battery;

[0009] 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;

[0010] Based on the fault analysis terminal, analyze and process the real-time orders and the historical change curve of the charging current of the integrated dual-gun DC charging pile to determine the average current change;

[0011] 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.

[0012] Preferably, the steps for obtaining the real-time orders of the integrated dual-gun DC charging pile and analyzing and processing the real-time orders of the integrated dual-gun DC charging pile based on the fault analysis terminal to obtain the relevant data of the charging equipment are as follows:

[0013] Based on the fault analysis terminal, perform data reading processing on the charging platform of the integrated dual-gun DC charging pile to obtain the real-time orders of the integrated dual-gun DC charging pile;

[0014] Based on the fault analysis terminal, perform information extraction processing on the real-time orders of the integrated dual-gun DC charging pile to obtain the type of the charging equipment;

[0015] The fault analysis terminal performs information retrieval processing on the database with the type of the charging equipment as the feature to obtain the type of the battery and the output power of the battery.

[0016] Preferably, the steps for obtaining the historical orders of the integrated dual-gun DC charging pile and 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 to obtain the historical change curve of the charging current are as follows:

[0017] Based on the fault analysis terminal, perform data extraction processing on the database to obtain the historical orders of the integrated dual-gun DC charging pile;

[0018] The fault analysis terminal performs order matching processing on the historical orders of the integrated dual-gun DC charging pile with the relevant data of the charging equipment as the feature to determine similar historical orders;

[0019] Based on the fault analysis terminal, analyze and process the similar historical orders to obtain the historical change curve of the charging current.

[0020] Preferably, the steps for the fault analysis terminal to perform order matching processing on the historical orders of the integrated dual-gun DC charging pile with the relevant data of the charging equipment as the feature to determine similar historical orders are as follows:

[0021] The fault analysis terminal performs the first information matching process on the historical orders of the integrated dual-gun DC charging pile with the type of charging device as a feature, and determines the first set of matching historical orders;

[0022] The fault analysis terminal performs the second information matching process on the first set of matching historical orders with the type of battery as a feature, and determines the second set of matching historical orders;

[0023] The fault analysis terminal performs the third information matching process on the second set of matching historical orders with the output power of the battery as a feature, and determines the similar historical orders.

[0024] Preferably, the specific calculation formula for determining the similar historical orders is: ;

[0025] In the formula, is the first set of matching historical orders; is the type of charging device; is the historical order of the integrated dual-gun DC charging pile; is the second set of matching historical orders; is the type of battery; is the similar historical order; is the output power of the battery.

[0026] Preferably, based on the fault analysis terminal, analyzing and processing the similar historical orders to obtain the specific steps of the historical change curve of the charging current are as follows:

[0027] The fault analysis terminal performs data retrieval processing on the database with the 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;

[0028] Based on the fault analysis terminal, performing feature extraction processing on the historical operation data of the integrated dual-gun DC charging pile, and obtaining the historical change data of the current and the historical charging duration of the integrated dual-gun DC charging pile;

[0029] The fault analysis terminal constructs a rectangular coordinate system, the parameter of the X-axis of the rectangular coordinate system is the charging duration, and the parameter of the Y-axis of the rectangular coordinate system is the historical change data of the current;

[0030] The fault analysis terminal performs curve plotting in the rectangular coordinate system according to the historical change data of the current and the historical charging duration of the integrated dual-gun DC charging pile, and obtains the historical change curve of the charging current.

[0031] Preferably, based on the fault analysis terminal, analyzing and processing the real-time order and the historical change curve of the charging current of the integrated dual-gun DC charging pile to determine the specific steps of the average change amount of the current are as follows:

[0032] Based on the fault analysis terminal, extract and process the information of the real-time orders of the integrated dual-gun DC charging pile to obtain the charged duration of the integrated dual-gun DC charging pile;

[0033] The fault analysis terminal performs feature extraction processing on the charging platform of the integrated dual-gun DC charging pile with the real-time orders of the integrated dual-gun DC charging pile as features to obtain the real-time current change data of the integrated dual-gun DC charging pile;

[0034] The fault analysis terminal uses the charged duration of the integrated dual-gun DC charging pile and the real-time current change data of the integrated dual-gun DC charging pile as features to draw a curve in the rectangular coordinate system to obtain the real-time charging current change curve;

[0035] Based on the fault analysis terminal, analyze and process the real-time charging current change curve and the historical charging current change curve to determine the average current change amount.

[0036] Preferably, the step 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 amount specifically includes the following steps:

[0037] The fault analysis terminal intercepts the historical charging current change curve with the charged duration of the integrated dual-gun DC charging pile as a feature to obtain a partial historical charging current change curve;

[0038] Based on the fault analysis terminal, perform a difference calculation on the partial historical charging current change curve and the real-time charging current change curve to obtain several groups of charging current differences;

[0039] Based on the fault analysis terminal, perform calculation processing on several groups of charging current differences to obtain the average current change amount;

[0040] Among them, the specific calculation formula for obtaining the average current change amount is: ;

[0041] In the formula, is the average current change amount; is the charging current difference; n is the specific number of several groups of charging current differences.

[0042] Preferably, the step 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 state of the integrated dual-gun DC charging pile specifically includes the following steps:

[0043] Based on the fault analysis terminal, judge the average current change amount and the set current change threshold;

[0044] If the average current change is greater than or equal to the set current change threshold, there is an overcurrent phenomenon during the charging of the integrated dual-gun DC charging pile. The charging state of the integrated dual-gun DC charging pile is abnormal, and the fault analysis terminal sends the abnormal information of the integrated dual-gun DC charging pile to the maintenance personnel;

[0045] If the average current change is less than the set current change threshold, the charging state of the integrated dual-gun DC charging pile is normal.

[0046] Furthermore, a fault detection system for an integrated dual-gun DC charging pile is proposed, which is used to implement the fault detection method of an integrated dual-gun DC charging pile as described above, including:

[0047] A fault analysis terminal, which analyzes and processes the charging current of the real-time order and the historical order of the integrated dual-gun DC charging pile to determine the real-time state of the integrated dual-gun DC charging pile. The fault analysis terminal is used to control the data transmission and information interaction between each module;

[0048] A database, which is used to store the type of the battery, the output power of the battery, the historical order of the integrated dual-gun DC charging pile, and the historical operation data of the integrated dual-gun DC charging pile;

[0049] A charging platform, which is used to store the real-time order of the integrated dual-gun DC charging pile;

[0050] An information matching module, which retrieves information from the database using the type of the charging device as a feature to obtain the type of the battery and the output power of the battery; the information matching module performs order matching processing on the historical order of the integrated dual-gun DC charging pile using the relevant data of the charging device as a feature to determine similar historical orders;

[0051] A coordinate system construction module, which constructs a rectangular coordinate system using the charging duration and the historical current change data;

[0052] A curve drawing module, which respectively draws curves in the rectangular coordinate system according to the historical current change data, the historical charging duration, the charged duration of the integrated dual-gun DC charging pile, and the real-time current change data of the integrated dual-gun DC charging pile to obtain the historical charging current change curve and the real-time charging current change curve;

[0053] A data analysis module, which analyzes and calculates the historical charging current change curve and the real-time charging current change curve to determine the average current change;

[0054] A state judgment module, which compares and judges the average current change amount and the set current change threshold value to determine the real-time state of the integrated dual-gun DC charging pile.

[0055] 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:

[0056] The present invention first analyzes the historical orders of the integrated dual-gun DC charging pile to determine the historical change curve of the charging current. Then, it analyzes the real-time order of the integrated dual-gun DC charging pile to determine the real-time change curve of the charging current. Next, it calculates and analyzes the real-time change curve of the charging current and the historical change curve of the charging current to determine the average current change amount. Finally, it judges the average current change amount to determine whether there is an overcurrent phenomenon in the integrated dual-gun DC charging pile, avoiding faults during the charging process of the integrated dual-gun DC charging pile, preventing spontaneous combustion, and reducing property losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic flow chart of steps S100 - S400 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0058] Figure 2 It is a schematic flow chart of steps S101 - S103 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0059] Figure 3 It is a schematic flow chart of steps S201 - S203 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0060] Figure 4 It is a schematic flow chart of steps S2021 - S2023 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0061] Figure 5 It is a schematic flow chart of steps S2031 - S2034 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0062] Figure 6 It is a schematic flow chart of steps S301 - S304 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0063] Figure 7 It is a schematic flow chart of steps S3041 - S3043 in a fault detection method for an integrated dual-gun DC charging pile proposed by the present invention;

[0064] Figure 8 Schematic diagram of the flow of steps S401 - S403 in a fault detection method for an integrated dual - gun DC charging pile proposed by the present invention;

[0065] Figure 9 Block diagram of the structure of a fault detection system for an integrated dual - gun DC charging pile proposed by the present invention. Detailed implementation manners

[0066] 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 can think of other obvious variations.

[0067] Referring to Figure 1 As shown, a fault detection method for an integrated dual - gun DC charging pile includes:

[0068] S100. Obtain the real - time order of the integrated dual - gun DC charging pile, and based on the fault analysis terminal, analyze and process the real - time order of the integrated dual - gun DC charging pile to obtain the relevant data of the charging device. Among them, the relevant data of the charging device includes the type of the battery and the output power of the battery;

[0069] S200. Obtain the historical order of the integrated dual - gun DC charging pile, and based on the fault analysis terminal, analyze and process the relevant data of the charging device and the historical order of the integrated dual - gun DC charging pile to obtain the historical change curve of the charging current;

[0070] S300. Based on the fault analysis terminal, analyze and process the real - time order of the integrated dual - gun DC charging pile and the historical change curve of the charging current to determine the average current change amount;

[0071] S400. Based on the fault analysis terminal, compare and judge the average current change amount with the set current change threshold to determine the real - time state of the integrated dual - gun DC charging pile;

[0072] Those skilled in the art can understand that when the integrated dual - gun DC charging pile charges the charging device, over - current may occur. Over - current will cause the temperature inside the integrated dual - gun DC charging pile to rise. When the temperature is too high, it may damage the wires inside the integrated dual - gun DC charging pile, and then damage the integrated dual - gun DC charging pile. When the temperature is too high, it may even cause the integrated dual - gun DC charging pile to catch fire, thus 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 over - current occurs in the integrated dual - gun DC charging pile, avoiding damage to the integrated dual - gun DC charging pile and reducing property loss.

[0073] Referring toFigure 2 As shown, obtain the real-time orders of the integrated dual-gun DC charging pile. Based on the fault analysis terminal, analyze and process the real-time orders of the integrated dual-gun DC charging pile to obtain the relevant data of the charging equipment. The specific steps are as follows:

[0074] S101. Based on the fault analysis terminal, perform data reading and processing on the charging platform of the integrated dual-gun DC charging pile to obtain the real-time orders of the integrated dual-gun DC charging pile.

[0075] S102. Based on the fault analysis terminal, perform information extraction and processing on the real-time orders of the integrated dual-gun DC charging pile to obtain the type of the charging equipment.

[0076] S103. The fault analysis terminal performs information retrieval and processing on the database with the type of the charging equipment as the feature to obtain the type of the battery and the output power of the battery.

[0077] In this embodiment, with the development of technology, the battery type and the output power of the battery of the same type of charging equipment may change. For example, the battery models of the 23rd and 24th models of a certain brand of new energy vehicle may change. Therefore, the output power of the battery will change accordingly. In addition, the number of batteries of the same type of new energy vehicle in different years may increase or decrease. Therefore, the output power of the battery will also change. Therefore, it is necessary to determine the type of the battery and the output power of the battery.

[0078] Refer to Figure 3 As shown, 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. The specific steps are as follows:

[0079] S201. Based on the fault analysis terminal, perform data extraction and processing on the database to obtain the historical orders of the integrated dual-gun DC charging pile.

[0080] S202. The fault analysis terminal performs order matching and processing on the historical orders of the integrated dual-gun DC charging pile with the relevant data of the charging equipment as the feature to determine similar historical orders.

[0081] S203. Based on the fault analysis terminal, analyze and process the similar historical orders to obtain the historical change curve of the charging current.

[0082] Refer to Figure 4 As shown, the fault analysis terminal performs order matching and processing on the historical orders of the integrated dual-gun DC charging pile with the relevant data of the charging equipment as the feature to determine similar historical orders. The specific steps are as follows:

[0083] S2021. The fault analysis terminal performs the first information matching process on the historical orders of the integrated dual-gun DC charging pile with the type of the charging device as a feature, and determines the first set of matching historical orders;

[0084] S2022. The fault analysis terminal performs the second information matching process on the first set of matching historical orders with the type of the battery as a feature, and determines the second set of matching historical orders;

[0085] S2023. The fault analysis terminal performs the third information matching process on the second set of matching historical orders with the output power of the battery as a feature, and determines the similar historical orders;

[0086] Among them, the specific calculation formula for determining the similar historical orders is: ;

[0087] In the formula, is the first set of matching historical orders; is the type of the charging device; is the historical order of the integrated dual-gun DC charging pile; is the second set of matching historical orders; is the type of the battery; is the similar historical order; is the output power of the battery;

[0088] In this embodiment, in order to accurately detect whether the integrated dual-gun DC charging pile has an 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 the charging device, the type of the battery, and the output power of the battery to obtain the historical orders that are the same as the charging device being charged. Because the same historical orders and the charging device being charged have the same battery and the same output power of the battery, when the charging device is charging, the charging current has the same change law. 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 an overcurrent.

[0089] Referring to Figure 5 shown, based on the fault analysis terminal, analyzing and processing the similar historical orders to obtain the specific steps of the historical change curve of the charging current are as follows:

[0090] S2031. The fault analysis terminal performs data retrieval processing on the database with the 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;

[0091] S2032. Based on the fault analysis terminal, perform feature extraction processing on the historical operation data of the integrated dual-gun DC charging pile to obtain the historical current change data and historical charging duration of the integrated dual-gun DC charging pile;

[0092] S2033. The fault analysis terminal constructs a rectangular coordinate system, where the parameter of the X-axis of the rectangular coordinate system is the charging duration, and the parameter of the Y-axis of the rectangular coordinate system is the historical current change data;

[0093] S2034. The fault analysis terminal draws a curve in the rectangular coordinate system according to the historical current change data and historical charging duration of the integrated dual-gun DC charging pile to obtain the historical charging current change curve.

[0094] Refer to Figure 6 As shown, based on the fault analysis terminal, analyze and process the real-time orders and historical charging current change curve of the integrated dual-gun DC charging pile to determine the average current change amount, which specifically includes the following steps:

[0095] S301. Based on the fault analysis terminal, perform information extraction processing on the real-time orders of the integrated dual-gun DC charging pile to obtain the charged duration of the integrated dual-gun DC charging pile;

[0096] S302. The fault analysis terminal performs feature extraction processing on the charging platform of the integrated dual-gun DC charging pile with the real-time orders of the integrated dual-gun DC charging pile as features to obtain the real-time current change data of the integrated dual-gun DC charging pile;

[0097] S303. The fault analysis terminal draws a curve in the rectangular coordinate system with the charged duration of the integrated dual-gun DC charging pile and the real-time current change data of the integrated dual-gun DC charging pile as features to obtain the real-time charging current change curve;

[0098] S304. Based on the fault analysis terminal, analyze and process the real-time charging current change curve and the historical charging current change curve to determine the average current change amount;

[0099] In this embodiment, calculating the average current change amount is used to screen out the current abnormal values at a certain moment, avoiding misjudgment of the operating state of the integrated dual-gun DC charging pile and improving the subsequent analysis accuracy.

[0100] Refer to Figure 7 As shown, based on the fault analysis terminal, analyze and process the real-time charging current change curve and the historical charging current change curve to determine the average current change amount, which specifically includes the following steps:

[0101] S3041. The fault analysis terminal intercepts the charging current historical change curve based on the charged duration of the integrated dual-gun DC charging pile, and obtains a partial charging current historical change curve;

[0102] S3042. Based on the fault analysis terminal, the difference between the partial charging current historical change curve and the real-time charging current change curve is calculated to obtain several groups of charging current differences;

[0103] S3043. Based on the fault analysis terminal, the several groups of charging current differences are calculated and processed to obtain the average current change amount;

[0104] Among them, the specific calculation formula for obtaining the average current change amount is: ;

[0105] In the formula, is the average current change amount; is the charging current difference; n is the specific number of several groups of charging current differences;

[0106] 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 historical change curve is a complete charging process. Therefore, in order to improve the accuracy of the subsequent analysis results, the charging current historical change curve is intercepted by the charged duration of the integrated dual-gun DC charging pile, so that the partial charging current historical change curve and the real-time charging current change curve have the same time interval. Therefore, the charging current at each moment in the partial charging current historical change curve and the real-time charging current change curve is subtracted to obtain several groups of charging current differences. Finally, the several groups of charging current differences are calculated and processed to obtain the average current change amount. The situation of overcurrent in the integrated dual-gun DC charging pile occurs as a current change within a period of time. Therefore, the average calculation of several groups of charging current differences is performed to avoid errors caused by judging with the current value at a certain moment. Because when the integrated dual-gun DC charging pile is charging, the current may change at a certain moment, but the current value conforms to the characteristics of overcurrent, but this value only appears at a certain moment and does not change continuously. Therefore, it is not overcurrent. Therefore, by performing the average calculation on several groups of charging current differences, the abnormal current values at a certain moment are screened out.

[0107] Refer to Figure 8 As shown, based on the fault analysis terminal, the comparison and judgment processing of the average current change amount and the set current change threshold are performed to determine the real-time state of the integrated dual-gun DC charging pile, which specifically includes the following steps:

[0108] S401. Based on the fault analysis terminal, the average current change amount and the set current change threshold are judged and processed;

[0109] S402. If the average current change is greater than or equal to the set current change threshold, there is an overcurrent phenomenon during the charging of the integrated dual-gun DC charging pile, the charging state of the integrated dual-gun DC charging pile is abnormal, and the fault analysis terminal sends abnormal information of the integrated dual-gun DC charging pile to the maintenance personnel;

[0110] S403. If the average current change is less than the set current change threshold, the charging state of the integrated dual-gun DC charging pile is normal.

[0111] Refer to Figure 9 As shown in the figure, a fault detection system for an integrated dual-gun DC charging pile is used to implement the fault detection method for an integrated dual-gun DC charging pile as described above, and includes:

[0112] A fault analysis terminal, which analyzes and processes the charging current of the real-time order and the historical order of the integrated dual-gun DC charging pile of the integrated dual-gun DC charging pile to determine the real-time state of the integrated dual-gun DC charging pile, and the fault analysis terminal is used to control data transmission and information interaction between each module;

[0113] A database, which is used to store the type of battery, the output power of the battery, the historical order of the integrated dual-gun DC charging pile, and the historical operation data of the integrated dual-gun DC charging pile;

[0114] A charging platform, which is used to store the real-time order of the integrated dual-gun DC charging pile;

[0115] An information matching module, which retrieves information from the database based on the type of charging device 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 order of the integrated dual-gun DC charging pile based on the relevant data of the charging device as a feature to determine similar historical orders;

[0116] A coordinate system construction module, which constructs a rectangular coordinate system based on the charging duration and the historical change data of the current;

[0117] A curve drawing module, which respectively draws curves in the rectangular coordinate system according to the historical change data of the charging current, the historical charging duration, the charged duration of the integrated dual-gun DC charging pile, and the real-time change data of the charging current of the integrated dual-gun DC charging pile, and respectively obtains the historical change curve of the charging current and the real-time change curve of the charging current;

[0118] A data analysis module, which analyzes and calculates the historical change curve of the charging current and the real-time change curve of the charging current to determine the average current change;

[0119] A status judgment module, which compares and judges the average current change amount and the set current change threshold value to determine the real-time status of the integrated dual-gun DC charging pile.

[0120] 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 by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended 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; 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 charging current; 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 as a feature to determine similar historical orders; 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.

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 specific calculation formula for determining similar historical orders is: Where H1 is the first matching historical order set; α is the type of charging equipment; H a is the historical order of the integrated dual-gun DC charging pile; H2 is the second matching historical order set; β is the type of battery; H3 is the similar historical order; γ is the output power of the battery.

4. The fault detection method of an integrated dual-gun DC charging pile according to claim 1 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.

5. The fault detection method of an integrated dual-gun DC charging pile according to claim 1 is 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, I p is the average change of current; I i is the charging current difference; n is the specific number of several groups of charging current differences.

6. 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.

7. 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 6, 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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