Fault detection method, system and device for electric vehicle charger and storage medium

Abstract

The embodiment of the invention provides a fault detection method, system and device for an electric vehicle charger and a storage medium. The method comprises the steps that if a detection instruction sent by a second intelligent terminal is received, electric vehicle charger parameters carried by the detection instruction are detected, and a parameter detection result is obtained; if the parameter detection result is that parameter setting is successful, performing fault detection on the electric vehicle charger by combining the electric vehicle charger parameters according to a detection stage to obtain a fault detection result; and sending the fault detection result to the second intelligent terminal so as to display the fault detection result through the second intelligent terminal and store the fault detection result to the cloud server. According to the embodiment of the invention, automatic, visual and accurate fault detection is realized, unnecessary return caused by misjudgment of a user can be reduced, namely, the false return rate of the electric vehicle charger is reduced, so that the working intensity of after-sales workers can be reduced, and the after-sales cost is saved.

Description

Technical Field

[0001] The present application relates to the field of charger detection technology, and in particular to a fault detection method, system, device and storage medium for an electric vehicle charger. Background Art

[0002] As the popularity of electric two-wheelers increases, after-sales problems of related electric vehicle parts are becoming increasingly prominent. For example, chargers are important accessories for electric vehicles. When users find problems with chargers, they return them directly. The return rate is increasing year by year. However, a large part of the reason is that they are returned by mistake, which creates a greater workload for the manufacturer's after-sales staff and increases labor costs. How to reduce the rate of mistaken returns is an urgent problem to be solved. Summary of the invention

[0003] The present application provides a fault detection method, system, device and storage medium for an electric vehicle charger, which can reduce the false return rate of the electric vehicle charger, thereby reducing the workload of after-sales personnel and reducing after-sales costs.

[0004] In a first aspect, an embodiment of the present disclosure provides a fault detection method for an electric vehicle charger, which is applied to a first smart terminal, comprising: if a detection instruction sent by a second smart terminal is received, the electric vehicle charger parameters carried by the detection instruction are detected to obtain a parameter detection result; if the parameter detection result is that the parameter setting is successful, according to the detection stage, the electric vehicle charger is fault detected in combination with the electric vehicle charger parameters to obtain a fault detection result; the fault detection result is sent to the second smart terminal, so as to display the fault detection result through the second smart terminal and store the fault detection result in a cloud server.

[0005] In a second aspect, an embodiment of the present disclosure further provides a fault detection method for an electric vehicle charger, which is applied to a second smart terminal, and includes: in response to a click operation on a parameter button, obtaining parameters of the electric vehicle charger; in response to a click operation on a detection button, sending a detection instruction to a first smart terminal; the detection instruction includes the electric vehicle charger parameters; receiving a fault detection result sent by the first smart terminal; wherein the fault detection result is a fault detection result obtained by performing fault detection on the electric vehicle charger in combination with the electric vehicle charger parameters according to a detection stage when the parameter detection result is a successful parameter setting; and in response to a click operation on a detection result reporting button, storing the fault detection result in a cloud server.

[0006] In a third aspect, an embodiment of the present disclosure further provides a fault detection system for an electric vehicle charger, the system comprising: a first smart terminal, a second smart terminal, and a cloud server; the second smart terminal is used to set the parameters of the electric vehicle charger; a detection instruction is sent to the first smart terminal; the detection instruction includes the electric vehicle charger parameters; the first smart terminal is used to detect the electric vehicle charger parameters carried by the detection instruction to obtain parameter detection results; if the parameter detection result is that the parameter setting is successful, then according to the detection stage, the electric vehicle charger is fault detected in combination with the electric vehicle charger parameters to obtain a fault detection result; the fault detection result is sent to the second smart terminal; the second smart terminal is also used to upload the fault detection result to the cloud server; the cloud server is used to store the fault detection result.

[0007] In a fourth aspect, an embodiment of the present disclosure further provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the fault detection method for an electric vehicle charger as described in an embodiment of the present disclosure.

[0008] In a fifth aspect, an embodiment of the present disclosure further provides a storage medium comprising computer executable instructions, which, when executed by a computer processor, are used to execute the fault detection method for an electric vehicle charger as described in an embodiment of the present disclosure.

[0009] The technical solution of the embodiment of the present disclosure, if receiving the detection instruction sent by the second intelligent terminal, then the electric vehicle charger parameters carried by the detection instruction are detected to obtain the parameter detection result; if the parameter detection result is that the parameter setting is successful, then according to the detection stage, the electric vehicle charger is fault-detected in combination with the electric vehicle charger parameters to obtain the fault detection result; the fault detection result is sent to the second intelligent terminal, so that the fault detection result is displayed by the second intelligent terminal and the fault detection result is stored in the cloud server. In the embodiment of the present disclosure, the first intelligent terminal performs fault detection on the electric vehicle charger based on the detection instruction sent by the second intelligent terminal, according to the detection stage, in combination with the electric vehicle charger parameters, and displays the fault detection result by the second intelligent terminal and uploads the fault detection result to the cloud server, thereby realizing automated, visualized and precise fault detection, which can reduce unnecessary returns caused by user misjudgment, that is, reduce the false return rate of electric vehicle chargers, so that after-sales staff can return or exchange goods based on the fault detection results of the cloud server, greatly reducing the workload of after-sales staff and saving after-sales costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0011] Figure 1 A schematic diagram of a fault detection method for an electric vehicle charger provided in an embodiment of the present application;

[0012] Figure 2 A schematic flow chart of another method for fault detection of an electric vehicle charger provided in an embodiment of the present application;

[0013] Figure 3 A schematic diagram of online communication provided by an embodiment of the present invention;

[0014] Figure 4 A diagram showing the main interface effect provided by an embodiment of the present invention;

[0015] Figure 5 A schematic diagram of a manufacturer parameter selection interface provided in an embodiment of the present application;

[0016] Figure 6 A schematic diagram of a current parameter selection interface provided in an embodiment of the present application;

[0017] Figure 7 A schematic diagram of a voltage parameter selection interface provided in an embodiment of the present application;

[0018] Figure 8 A schematic diagram of a voltage curve display effect provided by an embodiment of the present invention;

[0019] Fig. 9 A schematic diagram of the photo taking and code scanning interface provided in the embodiment of the present application;

[0020] Fig.10 A schematic diagram of another fault detection process of an electric vehicle charger provided by an embodiment of the present invention;

[0021] Fig.11 A schematic diagram of the architecture of a fault detection system for an electric vehicle charger provided by an embodiment of the present invention;

[0022] Fig.12 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0024] It should be understood that the various steps recorded in the method implementation of the present disclosure can be performed in different orders and / or in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect. The term "including" and its variations used herein are open inclusions, that is, "including but not limited to". It should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units. It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative and not restrictive, and those skilled in the art should understand that unless otherwise clearly stated in the context, it should be understood as "one or more". It is understandable that the data involved in the present technical solution (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of the corresponding laws, regulations and relevant provisions.

[0025] Figure 1 The present invention provides a method for detecting a fault in an electric vehicle charger. Optionally, the method is implemented by an electronic device, which may be a mobile terminal, a PC, or a server. Figure 1 As shown, the method includes:

[0026] S110: If a detection instruction sent by the second smart terminal is received, the electric vehicle charger parameters carried by the detection instruction are detected to obtain parameter detection results.

[0027] In this embodiment, there is no restriction on the electric vehicle charger parameters carried by the detection instruction, and for example, three parameters may be included, such as electric vehicle charger manufacturer parameters, electric vehicle charger current parameters, and electric vehicle charger voltage parameters.

[0028] In this embodiment, the electric vehicle charger parameters are detected to detect whether the parameters include all of the following parameters: electric vehicle charger manufacturer parameters, electric vehicle charger current parameters, and electric vehicle charger voltage parameters.

[0029] In this embodiment, the first intelligent terminal is not limited, for example, it can be a small and portable electric vehicle charger maintenance instrument, which is used to detect faults of electric vehicle chargers. The electric vehicle charger maintenance instrument uses a low-voltage lithium battery for power supply, which is safe and reliable.

[0030] In this embodiment, there is no limitation on the second intelligent terminal, and it may be, for example, a mobile phone (the user may operate it through a mini program), a tablet, etc.

[0031] Optionally, the electric vehicle charger parameters carried by the detection instruction are detected to obtain parameter detection results, including: if the electric vehicle charger parameters include at most two of the following parameters, the electric vehicle charger parameter detection result is a parameter setting failure: electric vehicle charger manufacturer parameters, electric vehicle charger current parameters, and electric vehicle charger voltage parameters; if the electric vehicle charger parameters include all three parameters, the electric vehicle charger parameter detection result is a parameter setting success.

[0032] In this embodiment, if the electric vehicle charger parameters carried by the detection instruction do not include all three parameters, it is considered that the parameter setting has failed, and the corresponding parameters need to be set, and the corresponding reminder information is sent to the second smart terminal, and the second smart terminal reminds the user to set the corresponding parameters through a pop-up window. If the electric vehicle charger parameters carried by the detection instruction include all three parameters, it is considered that the parameter setting is successful, and the subsequent detection process can be entered.

[0033] In this embodiment, the accuracy of fault detection can be improved by checking whether the electric vehicle charger parameters carried by the detection instruction include all three parameters.

[0034] S120: If the parameter detection result is that the parameter setting is successful, then according to the detection stage, the electric vehicle charger is subjected to fault detection in combination with the electric vehicle charger parameters to obtain a fault detection result.

[0035] The detection phase includes a constant voltage charging phase, a constant current and constant voltage phase, and a trickle current phase in sequence.

[0036] In this embodiment, if the fault detection result of the electric vehicle charger in the constant voltage charging stage is qualified, the electric vehicle charger in the constant current and constant voltage stage is fault detected; if the fault detection result of the electric vehicle charger in the constant current and constant voltage stage is qualified, the electric vehicle charger in the trickling stage is fault detected; if the fault detection result of the electric vehicle charger in the trickling stage is qualified, the final fault detection result is that the electric vehicle charger is qualified.

[0037] In this embodiment, if one or more of the following situations exist, the fault detection result is considered to be an electric vehicle charger fault: the fault detection result of the electric vehicle charger in the constant voltage charging stage is unqualified; the fault detection result of the electric vehicle charger in the constant current and constant voltage stage is unqualified; the fault detection result of the electric vehicle charger in the trickle current stage is unqualified.

[0038] In this embodiment, the standard parameters of each detection stage are different, but are all related to the electric vehicle charger parameters, and the standard parameters of each detection stage can be obtained according to the electric vehicle charger parameters. For each detection stage, the fault detection result of the corresponding detection stage can be obtained by comparing the actual detection value obtained with the standard parameters of the corresponding detection stage.

[0039] Optionally, according to the detection stage, the electric vehicle charger is subjected to fault detection in combination with the electric vehicle charger parameters to obtain fault detection results, including: determining the detection result corresponding to the constant voltage starting charging stage based on the actual starting charging voltage and the first standard voltage corresponding to the electric vehicle charger voltage parameter; if the detection result corresponding to the constant voltage starting charging stage is that the starting charging voltage is qualified, then determining the detection result corresponding to the constant current and constant voltage stage based on the actual charging voltage and the second standard voltage corresponding to the electric vehicle charger voltage parameter, the actual charging current and the standard current corresponding to the electric vehicle charger current parameter; wherein the actual charging current and the actual charging voltage are the current and voltage obtained after the electric vehicle charger is connected to a set load; if the constant current and constant voltage stage is qualified, then the actual charging current and the actual charging voltage are the current and voltage obtained after the electric vehicle charger is connected to a set load. If the detection result corresponding to the constant voltage starting charging stage is that the charging current is qualified and the charging voltage is qualified, the detection result corresponding to the trickle stage is determined based on the actual trickle voltage and the third standard voltage corresponding to the voltage parameter of the electric vehicle charger; wherein the actual trickle voltage is the electric vehicle charger turning light voltage; if the detection result corresponding to the trickle stage is that the trickle voltage is qualified, then the fault detection result is that the electric vehicle charger is qualified; if there is at least one of the following: the detection result corresponding to the constant voltage starting charging stage is that the starting charging voltage is unqualified, the detection result corresponding to the constant current and constant voltage stage is that the charging current is unqualified, the detection result corresponding to the constant current and constant voltage stage is that the charging voltage is unqualified, and the detection result corresponding to the trickle stage is that the trickle voltage is unqualified, then the fault detection result is that the electric vehicle charger is faulty.

[0040] In this embodiment, there is no limit on the detection time of the three detection stages, for example, the constant voltage charging stage is 5 seconds, the constant current and constant voltage stage is 5 seconds, and the trickle stage is 25 seconds.

[0041] In this embodiment, the constant voltage charging stage is first entered to obtain the actual starting charging voltage and the first standard voltage corresponding to the voltage parameter of the electric vehicle charger, and the voltage parameter of the electric vehicle charger is different from the first standard voltage. If the actual starting charging voltage is different from the first standard voltage, or the actual starting charging voltage does not fall within the voltage range corresponding to the first standard voltage, it is considered that the detection result corresponding to the constant voltage charging stage is that the starting charging voltage is unqualified, and the fault detection result is that the electric vehicle charger is faulty, and a message reminder is sent to the second smart terminal in the form of a pop-up window, such as "The charging voltage of the charger is lower than the normal value, which may cause the battery to be not fully charged or unable to charge normally."

[0042] If the actual starting charging voltage is the same as the first standard voltage, or the actual starting charging voltage falls within the voltage range corresponding to the first standard voltage, the detection result corresponding to the constant voltage starting charging stage is that the starting charging voltage is qualified, and then the constant current and constant voltage stage is entered: the electric vehicle charger is connected to a set load to simulate the charging condition of the charger. The actual charging voltage and the second standard voltage corresponding to the voltage parameter of the electric vehicle charger, the actual charging current and the standard current corresponding to the current parameter of the electric vehicle charger are obtained.

[0043] If the actual charging voltage is different from the second standard voltage, or the actual charging voltage does not fall within the voltage range corresponding to the second standard voltage, the charging voltage is unqualified, and the fault detection result is an electric vehicle charger fault, and a message reminder is sent to the second smart terminal by means of a pop-up window. If the actual charging current is different from the standard current, or the actual charging current does not fall within the current range corresponding to the standard current, the charging current is unqualified, and the fault detection result is an electric vehicle charger fault, and a message reminder is sent to the second smart terminal by means of a pop-up window. If the actual charging voltage is the same as the second standard voltage, or the actual charging voltage falls within the voltage range corresponding to the second standard voltage, the charging voltage is qualified. If the actual charging current is the same as the standard current, or the actual charging current falls within the current range corresponding to the standard current, the charging current is qualified and enters the trickle stage: obtain the actual trickle voltage and the third standard voltage corresponding to the voltage parameter of the electric vehicle charger, if the actual trickle voltage is different from the third standard voltage, or the actual trickle voltage does not fall within the voltage range corresponding to the third standard voltage, the trickle voltage is unqualified, the fault detection result is an electric vehicle charger fault, and a message reminder is sent to the second smart terminal by means of a pop-up window.

[0044] If the actual trickle voltage is the same as the third standard voltage, or the actual trickle voltage falls within the voltage range corresponding to the third standard voltage, the trickle voltage is qualified, and the fault detection result is that the electric vehicle charger is qualified.

[0045] In this embodiment, the actual trickle voltage is the voltage when the electric vehicle charger turns on the light, that is, in the trickle stage, the set load is unloaded and the voltage when the electric vehicle charger turns on the light is the actual trickle voltage.

[0046] In this embodiment, the charger is comprehensively tested through three detection stages: constant voltage charging, constant current and constant voltage, and trickle charging. This can improve the accuracy and comprehensiveness of fault detection. By testing in stages and judging whether the parameters of each stage (charging starting voltage, charging current, charging voltage, trickle voltage) are qualified, it is possible to accurately identify whether the charger has a fault, thereby improving the accuracy of fault detection.

[0047] S130: Send the fault detection result to the second smart terminal, so that the fault detection result is displayed through the second smart terminal and the fault detection result is stored in a cloud server.

[0048] It should be noted that after the first smart terminal and the second smart terminal complete online communication, the second smart terminal can obtain the store code. The store code is a unique identity code. The store code is written into the electrically erasable programmable read-only memory (EEPROM) of the first smart terminal when it leaves the factory to ensure that the store code of each first smart terminal is unique. The store code can be used as the address code of the fault detection result and is bound to the sales store. The contact information of the sales store manager can be found according to the store code.

[0049] Among them, the cloud server includes a cloud database (which can be called a three-guarantee database). In the cloud database, each store code has a corresponding data table, and all fault detection results of the first smart terminal are stored in the corresponding data table.

[0050] In this embodiment, after receiving the fault detection result, the second intelligent terminal can display the fault detection result in any form, such as a chart, and store the store code and the fault detection result in the cloud server, so as to store the fault detection result in the corresponding data table according to the store code. The cloud server also includes a backend management system, the operation of which depends on the cloud database. After-sales staff can manage, count, analyze, and retrieve the fault detection results in the data table in the cloud database through the backend management system, and return or exchange the electric vehicle charger whose fault detection result is a faulty electric vehicle charger by screening the fault detection results.

[0051] Optionally, after sending the fault detection result to the second smart terminal, it also includes: if a detection curve generation instruction sent by the second smart terminal is received, the detection data in each detection stage is sent to the second smart terminal, so that the second smart terminal fits the detection data in each detection stage into a detection curve; wherein the detection curve includes a voltage curve and a current curve.

[0052] In this embodiment, for the second smart terminal, in response to the curve generation click operation, a detection curve generation instruction is generated, and the detection curve generation instruction is sent to the first smart terminal. The first smart terminal receives the detection curve generation instruction, and sends the detection data in the three detection stages of the constant voltage charging stage, the constant current and constant voltage stage, and the trickle stage to the second smart terminal, so that the second smart terminal fits the detection data of each detection stage into a detection curve; wherein the detection curve includes a voltage curve and a current curve. The voltage curve and the current curve are respectively fitted by multiple detection data points. The first smart terminal sends the voltage and current detection data obtained in the three detection stages of the electric vehicle charger to the second smart terminal (such as WeChat applet) through wireless transmission (such as Bluetooth), and the second smart terminal fits the detection data into a detection curve.

[0053] In this embodiment, the detection data is converted into a detection curve through the second intelligent terminal, which is convenient for visualization and real-time reflection of the charging voltage and current indicators of the charger in each detection stage, so as to facilitate comparison, analysis and statistics by store staff and quickly determine whether the charger has a fault.

[0054] The technical solution of the embodiment of the present disclosure is that if a detection instruction sent by the second intelligent terminal is received, the electric vehicle charger parameters carried by the detection instruction are detected to obtain parameter detection results; if the parameter detection result is that the parameter setting is successful, the electric vehicle charger is fault-detected in combination with the electric vehicle charger parameters according to the detection stage to obtain a fault detection result; the fault detection result is sent to the second intelligent terminal, so that the fault detection result is displayed through the second intelligent terminal and the fault detection result is stored in the cloud server. In the embodiment of the present disclosure, the first intelligent terminal performs fault detection on the electric vehicle charger based on the detection instruction sent by the second intelligent terminal, in combination with the electric vehicle charger parameters according to the detection stage, and uploads the fault detection result to the cloud server through the second intelligent terminal, thereby realizing automated, visualized, and precise fault detection, which can reduce unnecessary returns caused by user misjudgment, that is, reduce the false return rate of electric vehicle chargers, so that after-sales staff can return or exchange goods based on the fault detection results of the cloud server, greatly reducing the workload of after-sales staff and saving after-sales costs.

[0055] It should be noted that the first smart terminal and the second smart terminal are used by store sales staff, and after-sales staff manage, retrieve, and screen the fault detection results through the backend management system of the cloud server, and return or exchange the electric vehicle chargers whose fault detection results are faulty electric vehicle chargers. Since the fault detection of the chargers by the first smart terminal and the second smart terminal can reduce unnecessary returns due to user misjudgment, the workload of after-sales staff and after-sales costs can be reduced.

[0056] Figure 2 A schematic flow chart of another method for fault detection of an electric vehicle charger provided in an embodiment of the present application.

[0057] S210: In response to a click operation on a parameter button, obtaining parameters of the electric vehicle charger.

[0058] It should be noted that before the first smart terminal communicates with the second smart terminal, the second smart terminal needs to complete online communication with the first smart terminal through wireless communication.

[0059] In this embodiment, after the first smart terminal completes online communication with the second smart terminal, the store code of the first smart terminal can be obtained.

[0060] For example, Figure 3 The embodiment of the present invention provides an online communication schematic diagram. In response to the user pressing the "online communication" button, the communication connection between the second smart terminal and the first smart terminal is completed.

[0061] For example, Figure 3 After completing the online communication, enter Figure 4 , Figure 4 This is a main interface effect display diagram provided by an embodiment of the present invention. Through the main interface, you can click the manufacturer parameter button, current parameter button, voltage parameter button, detection button, generate detection curve button, detect on-site photo scanning button, and detect result report button.

[0062] Among them, the parameters of the electric vehicle charger include the electric vehicle charger manufacturer parameters, the electric vehicle charger current parameters and the electric vehicle charger voltage parameters.

[0063] Exemplarily, in response to a click operation on a manufacturer parameter button, a manufacturer parameter selection interface is displayed, and in response to a click operation on the manufacturer parameter selection interface, the manufacturer parameters of the electric vehicle charger are obtained. Figure 5 As shown, Figure 5A schematic diagram of the manufacturer parameter selection interface provided in the embodiment of the present application. The user can click on the manufacturer that matches the electric vehicle charger in the manufacturer parameter selection interface, and click the confirmation button to obtain the electric vehicle charger manufacturer parameters, and click the return button to return to the main interface.

[0064] Exemplarily, in response to a click operation on a current parameter button, a current parameter selection interface is displayed, and in response to a click operation on the current parameter selection interface, the electric vehicle charger current parameter is obtained. Figure 6 As shown, Figure 6 A schematic diagram of the current parameter selection interface provided in an embodiment of the present application. The user can click on the current that matches the electric vehicle charger in the current parameter selection interface, and click the confirmation button to obtain the electric vehicle charger current parameters. By clicking the return button, you can return to the main interface.

[0065] Exemplarily, in response to a click operation on a voltage parameter button, a voltage parameter selection interface is displayed, and in response to a click operation on the voltage parameter selection interface, the voltage parameter of the electric vehicle charger is obtained. Figure 7 As shown, Figure 7 A schematic diagram of the voltage parameter selection interface provided in an embodiment of the present application. The user can click on the voltage that matches the electric vehicle charger in the voltage parameter selection interface, and click the confirmation button to obtain the electric vehicle charger voltage parameters. By clicking the return button, you can return to the main interface.

[0066] S220: In response to a click operation on a detection button, sending a detection instruction to the first smart terminal.

[0067] Wherein, the detection instruction includes the electric vehicle charger parameters.

[0068] S230: Receive the fault detection result sent by the first smart terminal.

[0069] The fault detection result is a fault detection result obtained by performing fault detection on the electric vehicle charger in combination with the electric vehicle charger parameters according to the detection stage when the parameter detection result is that the parameter setting is successful.

[0070] Optionally, after receiving the fault detection result sent by the first smart terminal, it also includes: in response to a generate detection curve button, sending a detection curve generation instruction to the first smart terminal; receiving detection data in each detection stage sent by the first smart terminal based on the detection curve generation instruction; fitting a detection curve based on the detection data of each detection stage; wherein the detection curve includes a voltage curve and a current curve.

[0071] Exemplarily, the second intelligent terminal takes a mini program as an example, and the detection curve takes a voltage curve as an example. Figure 8 This is a schematic diagram of the voltage curve display effect provided by an embodiment of the present invention. Figure 8 The voltage curve in the blue part is shown, with the horizontal axis representing time in seconds and the vertical axis representing voltage in V. The current curve is not shown (click Figure 8 If the detection curve is successfully fitted, you can also get corresponding reminder information, such as Figure 8 The “curve loaded successfully” is shown. The detection curve can be uploaded to the cloud server through the upload button. In response to the click operation of the return button, the previous interface, that is, the main interface, is returned.

[0072] S240: In response to a click operation on a detection result reporting button, the fault detection result is stored in a cloud server.

[0073] In this embodiment, after the repair code is verified and passed, the fault detection result can be stored in the cloud server.

[0074] Optionally, the fault detection result is stored in the cloud server, including: in response to a click operation on a scan code button, obtaining the repair code of the electric vehicle charger; wherein the repair code is obtained by scanning an information code on the electric vehicle charger; verifying the repair code to obtain a verification result; if the verification result of the repair code is passed, storing the pre-received store code and the fault detection result in the cloud server, so that the cloud server stores the fault detection result according to the store code.

[0075] The information code can be a barcode, QR code, etc., located on the electric vehicle charger. The repair code is used by staff to statistically check the fault detection results. Since the repair code is uniquely recorded in the cloud database, it can prevent sales stores from cheating in detection.

[0076] Among them, the repair code can be used to identify and track the returned electric vehicle chargers to ensure the accuracy and effectiveness of after-sales service. The repair code is unique in the cloud database, which can ensure that each returned electric vehicle charger can be accurately recorded and tracked. This uniqueness helps prevent sales stores from cheating during the repair process, because each repair code is associated with the corresponding sales store and electric vehicle charger, and any repair activity can be accurately recorded and verified.

[0077] In this embodiment, before storing the fault detection result in the cloud server, the method further includes: in response to a click operation on a button for taking a photo or scanning a code at the detection site, displaying a photo taking and code scanning interface. Fig. 9 As shown, Fig. 9This is a schematic diagram of the photo taking and code scanning interface provided by the embodiment of the present application. In response to the click operation of the code scanning button, the information code on the electric vehicle charger can be scanned to obtain the repair code of the electric vehicle charger.

[0078] In this embodiment, in response to clicking the button for reporting the test results, the repair code obtained is compared with the standard repair code in the cloud database. If the repair code obtained is the same as the standard repair code in the cloud database, the verification result is considered to be passed. If the verification result of the repair code is passed, the pre-received store code and the fault detection result are stored in the cloud server, so that the cloud server stores the fault detection result according to the store code. If the repair code obtained is not the same as the standard repair code in the cloud database, the verification result is considered to be failed, and the pre-received store code and the fault detection result cannot be stored in the cloud server.

[0079] In this embodiment, the repair code is checked to ensure the accuracy and traceability of the repair process. By checking the repair code, the legitimacy of the electric vehicle charger can be verified to prevent fraudulent repairs, thereby ensuring the quality and efficiency of after-sales service. At the same time, only the fault detection results that have passed the verification will be reported, which enhances the safety and reliability of fault detection.

[0080] Optionally, after storing the fault detection result in the cloud server, it also includes: obtaining a detection picture in response to a click operation on a photo button; wherein the detection picture is used to record the process of the first smart terminal performing fault detection on the electric vehicle charger; and uploading the detection picture to the cloud server in response to a click operation on a picture upload button.

[0081] For example, Fig. 9 As shown, in response to the click operation of the photo button, the detection picture is obtained, and in response to the click operation of the picture upload button, the detection picture is uploaded to the cloud server. In response to the click operation of the return button, the main interface is returned. Fig. 9 The entire black part in the image can display the detection picture.

[0082] In this embodiment, in the fault detection process, adding the steps of taking photos and scanning codes can prevent the detection cheating by the relevant personnel of the sales store and improve the accuracy of fault detection.

[0083] In this embodiment, the user can also view the operation instruction video on the second intelligent terminal to learn the operation process of the second intelligent terminal. For example, step 1, online communication. Step 2, store code acquisition. Step 3, electric vehicle charger manufacturer parameter setting. Step 4, electric vehicle charger current parameter setting. Step 5, electric vehicle charger voltage parameter setting. Step 6, repair code acquisition and detection. Step 7, take photos of the detection site and upload them. Step 8, report the detection results. Step 9, generate the detection curve.

[0084] The technical solution of the embodiment of the present disclosure, in response to the click operation of the parameter button, obtains the parameters of the electric vehicle charger; in response to the click operation of the detection button, sends a detection instruction to the first smart terminal; the detection instruction includes the parameters of the electric vehicle charger; receives the fault detection result sent by the first smart terminal; wherein the fault detection result is when the parameter detection result is that the parameter setting is successful, the electric vehicle charger is detected in accordance with the detection stage and combined with the electric vehicle charger parameters, and the fault detection result is obtained; in response to the click operation of the detection result reporting button, the fault detection result is stored in the cloud server. In the embodiment of the present disclosure, the parameters of the electric vehicle charger are set by the second smart terminal, the first smart terminal performs fault detection on the electric vehicle charger based on the detection instruction sent by the second smart terminal, in accordance with the detection stage, combined with the electric vehicle charger parameters, and the fault detection result is uploaded to the cloud server by the second smart terminal, thereby realizing automated, visualized, and precise fault detection. Through the precise fault detection of a smart terminal, the visualized parameter setting of the second smart terminal, and the reporting of the fault detection result, unnecessary returns caused by user misjudgment can be reduced, that is, the false return rate of the electric vehicle charger is reduced, thereby reducing the work intensity of after-sales staff and saving after-sales costs. At the same time, the second intelligent terminal is easy to operate, and the visual operation effect can improve the efficiency of fault detection.

[0085] Fig.10 A schematic diagram of another fault detection flow of an electric vehicle charger provided by an embodiment of the present invention.

[0086] S1001, waiting for detection instructions.

[0087] S1002: Determine whether a detection instruction is received. If received, proceed to S1003; otherwise, return to S1001.

[0088] S1003. Detect the electric vehicle charger parameters carried by the detection instruction. If the electric vehicle charger parameters include at most two of the following parameters, the electric vehicle charger parameter detection result is parameter setting failure: electric vehicle charger manufacturer parameters, electric vehicle charger current parameters, and electric vehicle charger voltage parameters; and remind the second smart terminal through a pop-up window to set the unset parameters. If the electric vehicle charger parameters include all three parameters, the electric vehicle charger parameter detection result is parameter setting success, and enter S1004.

[0089] S1004, the electric vehicle charger starts charging voltage activation.

[0090] S1005. Determine a detection result corresponding to the constant voltage charging stage based on the actual starting charging voltage and a first standard voltage corresponding to the voltage parameter of the electric vehicle charger.

[0091] S1006, determine whether the detection result corresponding to the constant voltage charging stage is qualified. If the detection result corresponding to the constant voltage charging stage is that the charging voltage is qualified, execute step S1007. If the detection result corresponding to the constant voltage charging stage is that the charging voltage is unqualified, execute step S1012.

[0092] S1007: Determine a detection result corresponding to the trickle stage based on the actual trickle voltage and a third standard voltage corresponding to the voltage parameter of the electric vehicle charger.

[0093] S1008, determine whether the detection result corresponding to the constant current and constant voltage stage is qualified. If the detection result corresponding to the constant current and constant voltage stage is that the charging current is qualified and the charging voltage is qualified, then execute step S1009. If the detection result corresponding to the constant current and constant voltage stage is that the charging current is unqualified and / or the charging voltage is unqualified, then execute step S1012.

[0094] S1009: Determine a detection result corresponding to the trickle stage based on the actual trickle voltage and a third standard voltage corresponding to the voltage parameter of the electric vehicle charger.

[0095] S1010, judging whether the detection result corresponding to the trickle stage is qualified, if the detection result corresponding to the trickle stage is that the trickle voltage is qualified, executing step S1011. If the detection result corresponding to the trickle stage is that the trickle voltage is unqualified, executing step S1012.

[0096] S1011. The fault detection result is that the electric vehicle charger passes the inspection and is uploaded to the cloud service.

[0097] S1012. The fault detection result is that the electric vehicle charger is faulty and is uploaded to the cloud service.

[0098] In this embodiment, the fault detection results of qualified electric vehicle chargers and the fault detection results of electric vehicle charger failures are uploaded to the cloud server in real time for easy management and statistics.

[0099] In the disclosed embodiment, the parameters of the electric vehicle charger are set through the second intelligent terminal, and the first intelligent terminal performs fault detection on the electric vehicle charger in accordance with the detection stage and in combination with the parameters of the electric vehicle charger based on the detection instruction sent by the second intelligent terminal, and uploads the fault detection result to the cloud server through the second intelligent terminal, thereby realizing automated and visualized fault detection. Through the accurate fault detection of a smart terminal, the visualized parameter setting of the second intelligent terminal and the reporting of the fault detection result, unnecessary returns due to user misjudgment can be reduced, that is, the false return rate of the electric vehicle charger is reduced, thereby reducing the work intensity of the after-sales staff and saving after-sales costs. At the same time, the second intelligent terminal is easy to operate and has a visualized operation effect, which can improve the efficiency of fault detection.

[0100] Fig.11 This is a schematic diagram of the fault detection system architecture of an electric vehicle charger provided by an embodiment of the present invention. Fig.11 As shown, the system includes: a first smart terminal, a second smart terminal, and a cloud server; the second smart terminal is used to set the parameters of the electric vehicle charger; a detection instruction is sent to the first smart terminal; the detection instruction includes the electric vehicle charger parameters; the first smart terminal is used to detect the electric vehicle charger parameters carried by the detection instruction to obtain parameter detection results; if the parameter detection result is that the parameter setting is successful, according to the detection stage, the electric vehicle charger is fault detected in combination with the electric vehicle charger parameters to obtain a fault detection result; the fault detection result is sent to the second smart terminal; the second smart terminal is also used to upload the fault detection result to the cloud server; the cloud server is used to store the fault detection result.

[0101] In this embodiment, the parameters of the electric vehicle charger are set through the second intelligent terminal; a detection instruction is sent to the first intelligent terminal; the detection instruction includes the electric vehicle charger parameters; the electric vehicle charger parameters carried by the detection instruction are detected through the first intelligent terminal to obtain parameter detection results; if the parameter detection result is that the parameter setting is successful, then according to the detection stage, the electric vehicle charger is fault detected in combination with the electric vehicle charger parameters to obtain a fault detection result; the fault detection result is sent to the second intelligent terminal; the repair code is checked through the second intelligent terminal, and if the verification result is passed, the pre-acquired repair code is compared with the standard repair code in the cloud database, and if the comparison is consistent, the fault detection result and the pre-acquired store code are uploaded to the cloud server, and the cloud server stores the fault detection result in the corresponding data table according to the store code.

[0102] In the disclosed embodiment, the parameters of the electric vehicle charger are set through the second intelligent terminal. The first intelligent terminal performs fault detection on the electric vehicle charger in accordance with the detection stage and in combination with the parameters of the electric vehicle charger based on the detection instruction sent by the second intelligent terminal, and uploads the fault detection results to the cloud server through the second intelligent terminal, thereby realizing automated and visualized fault detection. Through the accurate fault detection of an intelligent terminal, the visualized parameter setting of the second intelligent terminal and the reporting of the fault detection results, unnecessary returns due to user misjudgment can be reduced, that is, the erroneous return rate of the electric vehicle charger is reduced, thereby reducing the workload of after-sales staff and saving after-sales costs. At the same time, the second intelligent terminal is easy to operate and has a visualized operation effect, which can improve the efficiency of fault detection. The first intelligent terminal, the second intelligent terminal and the cloud server are seamlessly connected, realizing the effect of instant detection, transmission, display and immediate appearance of the electric vehicle charger.

[0103] In this embodiment, wireless control of the first smart terminal is achieved through wireless communication by a second smart terminal (such as a mobile phone), and data transmission is fast and convenient, which can reduce the cost of fault detection by the first smart terminal.

[0104] Fig.12A schematic diagram of an electronic device 10 that can be used to implement an embodiment of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0105] like Fig.12 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0106] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0107] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 11 executes the various methods and processes described above, such as the method for fault detection of an electric vehicle charger.

[0108] In some embodiments, the method for fault detection of an electric vehicle charger may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for fault detection of an electric vehicle charger described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the method for fault detection of an electric vehicle charger in any other appropriate manner (e.g., by means of firmware).

[0109] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0110] The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer programs are executed by the processor, the functions / operations specified in the flow charts and / or block diagrams are implemented. The computer programs may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0111] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device or equipment. A computer readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. A more specific example of a machine readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0112] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0113] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0114] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0115] An embodiment of the present application further provides a computer program product, including a computer program, which, when executed by a processor, implements a fault detection method for an electric vehicle charger as provided in any embodiment of the present application.

[0116] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present application, and the programming language includes an object-oriented programming language, such as Java, Smalltalk, C++, and also includes a conventional procedural programming language, such as "C" language or similar programming language. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on the remote computer, or completely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0117] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A fault detection method for an electric vehicle charger, characterized in that: Applied to the first intelligent terminal, including: If a detection instruction sent by the second smart terminal is received, the electric vehicle charger parameters carried by the detection instruction are detected to obtain parameter detection results; If the parameter detection result is that the parameter setting is successful, then according to the detection stage, the electric vehicle charger is fault-detected in combination with the electric vehicle charger parameters to obtain a fault detection result; The fault detection result is sent to the second smart terminal so that the fault detection result is displayed through the second smart terminal and the fault detection result is stored in the cloud server.

2. The method according to claim 1, characterized in that Detecting the electric vehicle charger parameters carried by the detection instruction to obtain parameter detection results, including: If the electric vehicle charger parameters include at most two of the following parameters, the electric vehicle charger parameter detection result is parameter setting failure: electric vehicle charger manufacturer parameters, electric vehicle charger current parameters, and electric vehicle charger voltage parameters; If the electric vehicle charger parameters include all three parameters, the electric vehicle charger parameter detection result is that the parameters are set successfully.

3. The method according to claim 2, characterized in that in, The detection stage includes a constant voltage charging stage, a constant current and constant voltage stage, and a trickle charging stage in sequence; According to the detection stage, the electric vehicle charger is subjected to fault detection in combination with the electric vehicle charger parameters to obtain a fault detection result, including: Determine the detection result corresponding to the constant voltage charging stage based on the actual starting charging voltage and the first standard voltage corresponding to the voltage parameter of the electric vehicle charger; If the detection result corresponding to the constant voltage starting charging stage is that the starting charging voltage is qualified, the detection result corresponding to the constant current and constant voltage stage is determined based on the actual charging voltage and the second standard voltage corresponding to the voltage parameter of the electric vehicle charger, the actual charging current and the standard current corresponding to the current parameter of the electric vehicle charger; wherein the actual charging current and the actual charging voltage are the current and voltage obtained after the electric vehicle charger is connected to the set load; If the detection result corresponding to the constant current and constant voltage stage is that the charging current is qualified and the charging voltage is qualified, then based on the actual trickle voltage and the third standard voltage corresponding to the voltage parameter of the electric vehicle charger, the detection result corresponding to the trickle stage is determined; wherein the actual trickle voltage is the electric vehicle charger light-on voltage; If the detection result corresponding to the trickle current stage is that the trickle current voltage is qualified, then the fault detection result is that the electric vehicle charger is qualified; If at least one of the following occurs: the detection result corresponding to the constant voltage charging stage is that the starting charging voltage is unqualified, the detection result corresponding to the constant current and constant voltage stage is that the charging current is unqualified, the detection result corresponding to the constant current and constant voltage stage is that the charging voltage is unqualified, and the detection result corresponding to the trickle stage is that the trickle voltage is unqualified, then the fault detection result is a fault of the electric vehicle charger.

4. The method according to claim 1, characterized in that: After sending the fault detection result to the second intelligent terminal, the method further includes: If a detection curve generation instruction is received from the second smart terminal, the detection data in each detection stage is sent to the second smart terminal, so that the second smart terminal fits the detection data in each detection stage into a detection curve; wherein the detection curve includes a voltage curve and a current curve.

5. A fault detection method for an electric vehicle charger, characterized in that: Applied to the second intelligent terminal, including: In response to a click operation on a parameter button, obtaining parameters of the electric vehicle charger; In response to a click operation on the detection button, a detection instruction is sent to the first smart terminal; the detection instruction includes the electric vehicle charger parameters; Receiving a fault detection result sent by the first intelligent terminal; wherein the fault detection result is a fault detection result obtained by performing a fault detection on the electric vehicle charger in combination with the electric vehicle charger parameters according to the detection stage when the parameter detection result is that the parameter setting is successful; In response to a click operation on a detection result reporting button, the fault detection result is stored in a cloud server.

6. The method according to claim 5, characterized in that Storing the fault detection result in a cloud server includes: In response to a click operation on a scan code button, a repair code of the electric vehicle charger is obtained; wherein the repair code is obtained by scanning an information code on the electric vehicle charger; Verify the repair code and obtain a verification result; If the verification result of the repair code is passed, the pre-received store code and the fault detection result are stored in the cloud server, so that the cloud server stores the fault detection result according to the store code.

7. The method according to claim 5, characterized in that After storing the fault detection result in the cloud server, the method further includes: In response to a click operation on a camera button, a detection picture is obtained; wherein the detection picture is used to record a process in which the first smart terminal performs fault detection on the electric vehicle charger; In response to a click operation on a picture upload button, the detection picture is uploaded to the cloud server.

8. A fault detection system for an electric vehicle charger, characterized in that: The system includes: a first intelligent terminal, a second intelligent terminal, and a cloud server; The second intelligent terminal is used to set the parameters of the electric vehicle charger; send a detection instruction to the first intelligent terminal; the detection instruction includes the parameters of the electric vehicle charger; The first intelligent terminal is used to detect the electric vehicle charger parameters carried by the detection instruction to obtain parameter detection results; if the parameter detection result is that the parameter setting is successful, then according to the detection stage, the electric vehicle charger is fault-detected in combination with the electric vehicle charger parameters to obtain a fault detection result; and the fault detection result is sent to the second intelligent terminal; The second intelligent terminal is further used to upload the fault detection result to a cloud server; The cloud server is used to store the fault detection result.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the fault detection method for an electric vehicle charger as described in any one of claims 1 to 7.

10. A storage medium comprising computer executable instructions, wherein the computer executable instructions are used to execute the fault detection method for an electric vehicle charger as claimed in any one of claims 1 to 7 when executed by a computer processor.

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