A method and device for recording fault waveforms in charging piles

Abstract

This invention provides a method and device for recording fault waveforms in charging piles, comprising: establishing a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit by installing a waveform recording device on the charger; acquiring real-time data and communication messages during charging of the charging pile through the voltage and current sampling circuit, the key component status sampling circuit, and the CAN communication monitoring circuit, and forming a log file from the real-time data; analyzing the communication messages through the waveform recording device to determine whether a start-up failure or abnormal shutdown has occurred during the charging process; when a start-up failure or abnormal shutdown occurs, converting the log data into a waveform image, and transmitting the waveform image and the log file to the backend. This invention, by installing a waveform recording device on the charger, can clearly and accurately locate the specific cause of the fault when a charging pile malfunctions, thereby enabling timely repairs and achieving automation, saving manpower and resources.

Description

Technical Field

[0001] This invention relates to the field of charging pile technology, specifically to a method and device for recording fault waveforms in charging piles. Background Technology

[0002] In recent years, the charging infrastructure industry has been developing rapidly, and the number of charging piles has grown rapidly. This continuous growth in the number of charging piles has been accompanied by a constant increase in on-site malfunctions. Charging pile malfunctions often occur instantaneously. When maintenance personnel go to the site for repairs, they can only rely on historical message reading and background fault records, which does not allow for a more direct view of the specific condition of the charging pile's key components at the time of the malfunction. This can lead to difficulties in clearly and accurately locating the specific cause of the malfunction. Some less common problems even require extensive simulations to reproduce the fault for analysis and localization, making subsequent backtracking and localization quite challenging. Summary of the Invention

[0003] To address the problem that existing technologies cannot clearly and accurately pinpoint the specific cause of a charging pile malfunction, thus hindering timely repairs, this invention proposes a charging pile fault recording method, comprising:

[0004] By adding a waveform recording device to the charger, a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit are built.

[0005] Real-time data and communication messages during charging of the charging pile are obtained through voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits, and the real-time data is generated into a log file.

[0006] The communication messages are analyzed by a waveform recording device to determine whether a startup failure or abnormal shutdown occurs during the charging process. When a startup failure or abnormal shutdown occurs, the log data is converted into a waveform image, and the waveform image and log file are transmitted to the background.

[0007] Optionally, the establishment of a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit through a waveform recording device installed on the charger includes:

[0008] Connect the positive and negative terminals of the active DI digital input interface configured on the control board of the waveform recording device to the two poles of the linkage auxiliary contact on the charging pile switching device to construct a key device status sampling circuit.

[0009] The communication port configured on the control board of the waveform recording device is connected in parallel on the CAN bus to construct a CAN communication monitoring loop;

[0010] Connect the sampling port configured on the control board of the waveform recording device to the positive and negative poles of the DC bus to construct a voltage sampling circuit;

[0011] Connect the sampling port configured on the control board of the waveform recording device to both ends of the shunt in the output circuit of the charging pile to construct a current sampling circuit;

[0012] The voltage and current sampling circuit includes a voltage sampling circuit and a current sampling circuit.

[0013] Optionally, the real-time data and communication messages during charging of the charging pile are obtained through a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit, and the real-time data is generated into a log file, including:

[0014] The DC output voltage of the charging pile, the voltage value of the control guide circuit CC1, and the real-time mV voltage at both ends of the charging pile shunt are obtained through the voltage and current sampling circuit, and the real-time mV voltage at both ends of the charging pile shunt is converted into current according to the transformation ratio.

[0015] The remote signaling status of the switching device is obtained through the key device status sampling circuit, and a communication message is generated.

[0016] The CAN communication monitoring loop listens to CAN communication data and AC side meter readings, generates communication messages from the CAN communication data, and provides an internal debugging communication port for designers.

[0017] The chip in the waveform recording device generates a log file containing the DC side output voltage of the charging pile, the voltage value of the control and guidance circuit CC1, the current, and the AC side meter readings.

[0018] Optionally, the step of acquiring the DC-side output voltage of the charging pile, the voltage value of the control guide circuit CC1, and the real-time mV voltage across the charging pile shunt via a voltage and current sampling circuit, and converting the real-time mV voltage across the charging pile shunt into current according to the transformation ratio, includes:

[0019] The DC-side output voltage of the charging pile is obtained through the DC voltage sampling port in the voltage and current sampling circuit.

[0020] The real-time mV voltage across the charging pile shunt is sampled through the DC current sampling port in the voltage and current sampling circuit, and the real-time mV voltage across the charging pile shunt is converted into current according to the transformation ratio.

[0021] The voltage value of the control guide circuit CC1 is obtained by sampling the control guide voltage in the voltage and current sampling loop.

[0022] Optionally, obtaining the remote signaling status of the switching device through the key device status sampling loop includes:

[0023] The remote signaling status of the switching devices connected to the multi-channel active DI digital input interface is obtained through the multi-channel active DI digital input interface in the key device status sampling loop.

[0024] The switching devices include: DC contactors, AC contactors, auxiliary power relays, electronic locks, and emergency stop devices.

[0025] Optionally, the CAN communication monitoring loop listens to CAN communication data and AC side meter readings, generates communication messages from the CAN communication data, and provides an internal debugging communication port for designers, including:

[0026] The CAN communication data is monitored through the four CAN2.0B communication ports in the CAN communication monitoring loop, and communication messages are generated.

[0027] The AC side voltage and current data are obtained by monitoring the AC side meter readings through one 485 communication channel in the CAN communication monitoring loop.

[0028] Internal debugging is performed via one RS232 communication channel in the CAN communication monitoring loop;

[0029] The CAN communication data includes: communication data between the charger and the vehicle, communication data between the internal TCU and the DCCU, and communication data between the DCCU and the charging module.

[0030] Optionally, the step of using a waveform recording device to analyze communication messages as a basis for determining whether a startup failure or abnormal shutdown occurs during the charging process, and converting log data into waveform images when a startup failure or abnormal shutdown occurs, includes:

[0031] The startup success is determined by judging the content of the "startup completion status frame" in the communication message through the waveform recording device. If the startup fails, the log generated from the receipt of the "startup command frame" to the receipt of the "startup completion status frame" is converted into a waveform image and stored. Otherwise, if the startup is successful, the abnormal shutdown reason in the "stop completion frame" in the communication between TCU and DCCU when charging stops is detected.

[0032] When an abnormal shutdown occurs, the log data generated during the charging process will be converted into a waveform image.

[0033] When no abnormal shutdown cause is found, the log data generated during the charging process will not be converted into waveform images.

[0034] Optionally, the waveform recording device has a power-off protection function, which delays power-off for 1 minute after the working power supply stops, and records the specific situation before and after the charging pile unexpectedly loses power.

[0035] Optionally, it also includes the ability to directly view logs and waveform images via an LVDS touchscreen in the waveform recording device.

[0036] Furthermore, the present invention also provides a waveform recording device for fault recording of charging piles, comprising:

[0037] The waveform recording device is installed on the charger to build voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits.

[0038] The voltage and current sampling circuit, the key component status sampling circuit, and the CAN communication monitoring circuit are used to acquire real-time data and communication messages during charging of the charging pile, and to generate a log file from the real-time data.

[0039] The waveform recording device is used to determine whether a startup failure or abnormal shutdown occurs during the charging process, based on the communication messages. When a startup failure or abnormal shutdown occurs, the log data is converted into a waveform image and transmitted to the background along with the log file.

[0040] Optionally, the waveform recording device is installed on the charger to establish voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits, including...

[0041] The positive and negative terminals of the active DI switch input interface configured on the control board of the waveform recording device are connected to the two poles of the linkage auxiliary contact on the charging pile switching device to construct a key device status sampling circuit.

[0042] The communication port of the control board of the waveform recording device is configured on the CAN bus in parallel communication lines to form a CAN communication monitoring loop;

[0043] The sampling port of the control board of the waveform recording device is connected to the positive and negative poles of the DC bus to form a voltage sampling loop;

[0044] The sampling port of the control board of the waveform recording device is connected to both ends of the shunt in the output circuit of the charging pile to form a current sampling circuit;

[0045] The voltage and current sampling circuit includes a voltage sampling circuit and a current sampling circuit.

[0046] Optionally, the voltage and current sampling circuit includes: a voltage sampling circuit and a current sampling circuit;

[0047] The voltage sampling circuit is used to obtain the DC side output voltage of the charging pile and the voltage value of the control guide circuit CC1;

[0048] The current sampling circuit is used to collect the real-time mV voltage across the charging pile shunt and convert the real-time mV voltage across the charging pile shunt into current according to the transformation ratio.

[0049] Optionally, the CAN communication monitoring loop includes:

[0050] Four CAN2.0B communication ports are used to monitor CAN communication data and generate communication messages;

[0051] One 485 communication channel is used to monitor the AC side meter readings and obtain AC side voltage and current data.

[0052] One RS232 communication port is provided for designers to have an internal debugging communication port.

[0053] Optionally, the waveform recording device is specifically used for:

[0054] The startup success is determined by judging the content of the "startup completion status frame" in the communication message through the waveform recording device. If the startup fails, the log generated from the receipt of the "startup command frame" to the receipt of the "startup completion status frame" is converted into a waveform image and stored. Otherwise, if the startup is successful, the abnormal shutdown reason in the "stop completion frame" in the communication between TCU and DCCU when charging stops is detected.

[0055] When an abnormal shutdown occurs, the log data generated during the charging process will be converted into a waveform image.

[0056] When no abnormal shutdown cause is found, the log data generated during the charging process will not be converted into waveform images.

[0057] In another aspect, this application also provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0058] The memory is used to store one or more programs;

[0059] When the one or more programs are executed by the at least one processor, a charging pile fault recording method as described above is implemented.

[0060] Furthermore, this application also provides a readable storage medium on which an executable program is stored, which, when executed, implements the charging pile fault recording method described above.

[0061] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0062] This invention provides a method for recording fault waveforms in charging piles, comprising: establishing a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit using a waveform recording device installed on the charger; acquiring real-time data and communication messages during charging of the charging pile through the voltage and current sampling circuit, the key component status sampling circuit, and the CAN communication monitoring circuit, and forming a log file from the real-time data; analyzing the communication messages through the waveform recording device to determine whether a start-up failure or abnormal shutdown has occurred during the charging process; when a start-up failure or abnormal shutdown occurs, converting the log data into a waveform image, and transmitting the waveform image and the log file to the backend. This invention, by installing a waveform recording device on the charger, can clearly and accurately locate the specific cause of the fault when a charging pile malfunctions, thereby enabling timely repairs and achieving automation, saving manpower and resources. Attached Figure Description

[0063] Figure 1 This is a flowchart of a charging pile fault recording method according to the present invention;

[0064] Figure 2 This is a schematic diagram of the sampling control board interface of the present invention;

[0065] Figure 3 This is a waveform diagram of the DC contactor of the present invention;

[0066] Figure 4 This is a schematic diagram of the waveform recording device system of the present invention;

[0067] Figure 5 This is a flowchart illustrating the data processing of the waveform recording device of the present invention.

[0068] Figure 6 This is a schematic diagram of the CAN communication log file monitored and saved by the waveform recording device of the present invention.

[0069] Figure 7 This is a schematic diagram of the communication messages between the charging pile and the vehicle according to the present invention;

[0070] Figure 8 This is a schematic diagram of the communication messages between the charging pile TCU and DCCU of the present invention;

[0071] Figure 9 This is a schematic diagram of the communication messages between the DCCU and the charging module of the charging pile according to the present invention;

[0072] Figure 10 This is an image generated during the simulated access control failure during charging, as described in this invention.

[0073] Figure 11 This is a schematic diagram of an electronic device structure according to the present invention. Detailed Implementation

[0074] In view of the above problems, this invention provides a method for recording fault waveforms in charging piles. Without changing the original charger system's hardware and software, this invention acquires real-time data and communication content during charging by adding a waveform recording device to the charger and establishing voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits. The data and messages from each charging session are stored as a log file. When the waveform recording device detects a start-up failure or abnormal shutdown during the charging process, it converts the log data into a waveform image and sends it to the backend along with the log. The stored waveform images and logs are stored in a rotating manner, with each message and image having a corresponding number. The device can store 20 charging process records; when more than 20 are stored, previously stored information is continuously deleted to reduce memory usage. Maintenance personnel can directly view the logs and waveform images through the backend or a display screen, facilitating more intuitive analysis and backtracking, improving fault analysis and location, and reducing the difficulty of on-site maintenance.

[0075] To better understand the present invention, the following description, in conjunction with the accompanying drawings and embodiments, will further illustrate the content of the present invention.

[0076] Example 1:

[0077] A method for recording fault waveforms in a charging pile, such as Figure 1 As shown, it includes:

[0078] Step S1: By installing a waveform recording device on the charger, a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit are built.

[0079] Step S2: Obtain real-time data and communication messages during charging of the charging pile through voltage and current sampling circuit, key component status sampling circuit, and CAN communication monitoring circuit, and form the real-time data into a log file;

[0080] Step S3: Analyze the communication messages using the waveform recording device to determine whether a startup failure or abnormal shutdown occurs during the charging process. When a startup failure or abnormal shutdown occurs, convert the log data into a waveform image and transmit the waveform image and log file to the background.

[0081] The charging pile fault recording device and method are as follows:

[0082] (1) Hardware parameters and functional configuration of the waveform recording device.

[0083] Because the waveform recording device needs to perform real-time analysis and waveform generation of charging data, an 800MHz main frequency chip is used, and 512MB of DDR3 memory is employed. Since the generated images need to be retained, the control board uses 1GB of FLASH memory. The sampling control board is powered by 12V DC to directly utilize the existing 12V auxiliary power supply on the charging pile.

[0084] The device control board is equipped with 10 active DI digital input interfaces to obtain the remote signaling status of switching devices such as DC contactors, AC contactors, auxiliary power relays, electronic locks, and emergency stops, while reserving 4 spare channels.

[0085] In terms of communication, it is equipped with 4 CAN2.0B communication ports for monitoring important CAN communication data such as communication between the charger and the vehicle, communication between the internal TCU and DCCU, and communication between DCCU and the charging module; 1 485 communication port for monitoring the AC side meter readings to obtain AC side voltage and current data; and 1 232 communication port for designers to perform internal debugging.

[0086] For sampling, it is equipped with 2 DC voltage sampling ports, with a range of -200V to 1000V, an accuracy of ≤±5V, and a sampling period of ms, used to obtain the real-time change of the DC side output voltage of the charging pile; 2 DC current sampling ports, with a voltage sampling of mV level, an accuracy of ≤0.5%, and a sampling period of 5ms, used to sample the real-time mV voltage at both ends of the charging pile shunt and convert it into current according to the transformation ratio; and 1 control guide voltage sampling port, with a range of 0V to 15V and an accuracy of ≤1%, used to obtain the voltage value of the CC1 control guide circuit.

[0087] In addition, the waveform recording device has a power-off protection function, which can delay power-off for 1 minute after the working power supply is interrupted, so as to record the specific situation before and after the charging pile's unexpected power failure; it has an LVDS touch screen display function for direct viewing of logs and waveform images; the interface diagram of the sampling control board is as follows. Figure 2 As shown.

[0088] (2) Acquisition of charging pile data and image generation.

[0089] Acquisition of charging pile switching status: Utilizing the built-in auxiliary contacts on the charging pile's switching devices, a sampling circuit is formed by connecting the positive and negative terminals of the active DI input interface of the waveform recording device to the two poles of the auxiliary contacts. When each switching device is open, the auxiliary contacts are open, and a 12V voltage difference exists between the positive and negative terminals of the control board's active input port. Upon recognizing this state, the control board determines that the switching device is open, recording a status of 0 in the log, and the generated waveform corresponds to a low level. When a switching device is closed, it causes the auxiliary contacts to close. At this time, a short circuit occurs between the positive and negative terminals of the control board's input port, pulling the voltage down to 0V. Upon recognizing this state, the control board determines that the switching device is closed, recording a status of 1 in the log, and the generated waveform corresponds to a high level. (See below) Figure 3 The waveform of the DC contactor is shown.

[0090] Acquisition of charging pile voltage and current values: The voltage sampling port of the waveform recording device is directly connected to the DC bus DC+ and DC- terminals for direct voltage sampling, and written to the log at a sampling period of 1ms. The current sampling port of the waveform recording device is directly connected to the two ends of the shunt in the output circuit of the charging pile, directly sampling the millivolt voltage at both ends and converting it into output current through a transformer ratio, also written to the log at a sampling period of 1ms. The voltage value of detection point 1 is directly sampled from the CC1 and PE lines on the charging head, and written to the log at a sampling period of 50ms. The AC side voltage and current are obtained by monitoring the communication between the charging pile's built-in AC meter and the DCCU. The AC voltage and current data are written to the log at the frequency of the monitored message period. The waveform recording device finally generates an image by plotting the data points in the log.

[0091] Communication message acquisition: Data interaction within the charger is acquired by listening to messages via a parallel communication line on the CAN bus and directly logged for easy viewing by maintenance personnel. The waveform recording device triggers the saving and uploading of logs and waveforms by recognizing message content. Listened messages include those between the TCU and DCCU, the DCCU and the charging module, and the charger and the vehicle. The overall system schematic is shown below. Figure 4 As shown, QF1 is the charger switching power supply circuit breaker, K8 is the charger switching power supply circuit relay, QF is the charger AC main circuit breaker, KM is the charger AC main circuit contactor, FU is the charger DC circuit fuse, RS is the charger DC circuit shunt, and K1 is the charger DC circuit contactor.

[0092] (3) Data processing flow of the waveform recording device.

[0093] Based on the communication protocol between the Billing Control Unit (TCU) and the Charging Controller Unit (DCCU), the process begins with the detection of a "start command frame" in the TCU-DCCU communication and ends with the detection of a "start completion status frame" or "stop completion frame" indicating "failure." Data collected during each charging session is recorded, including voltage, current, and switch status data, which are stored as logs. Monitored communication messages are stored via direct transfer. The data content is then analyzed based on the message content. If an anomaly is detected, a waveform image is generated and stored. The stored log and waveform image are then uploaded to the backend. The specific process is as follows:

[0094] Successful startup is determined by detecting the content of the "startup complete status frame" in the TCU-DCCU communication. If startup fails, the logs generated from the receipt of the "startup command frame" to the receipt of the "startup complete status frame" are converted into waveform images and stored. The waveforms and logs are then uploaded to the backend.

[0095] If startup is successful, the system waits to detect the cause of an abnormal shutdown in the "stop completion frame" communication between the TCU and DCCU when charging stops. If an abnormal shutdown cause is found, it indicates that the charging stopped abnormally. The control board then converts the logs generated during charging into waveform images, stores them in turn, and uploads the waveforms and logs together to the backend. If no abnormal shutdown cause is found, it indicates that the charging stopped normally, and no images are generated, nor are the logs uploaded to the backend. Figure 5 As shown below.

[0096] This invention provides a method for recording fault waveforms in a charger. It requires no modification to the charging pile's hardware or software; only an external device is needed to record fault waveforms during the charging process. Through the log data and waveform images generated by charging anomalies, maintenance personnel can gain a more intuitive understanding of the overall status of the charging pile at the time of the fault, either from the device screen or the backend. This facilitates the tracing and localization of charging equipment faults and effectively improves the work efficiency of maintenance personnel.

[0097] Example 2

[0098] Based on a 180kW charger, a waveform recording device developed using the method described in this paper was used to conduct waveform recording experiments.

[0099] The log file generated by the waveform recording device after acquiring the voltage and current switch status values ​​of the charging pile is as follows:

[0100] Each line, from left to right, contains: year, month, day; hour, minute, second, millisecond; A-phase AC voltage; A-phase AC current; B-phase AC voltage; B-phase AC current; C-phase AC voltage; C-phase AC current; AC input power; DC output voltage; DC output current (sampled 5 times at 1ms); DC contactor status; voltage value at detection point 1; electronic lock status; and AC relay status. The CAN communication log file, monitored and saved by the waveform recording device, is as follows: Figure 6 The communication messages between the charging pile and the vehicle are as follows: Figure 7 As shown, the communication messages between the charging pile TCU and DCCU are as follows: Figure 8 As shown, the communication messages between the charging pile DCCU and the charging module are as follows: Figure 9 As shown, a simulated access control malfunction occurs during charging, and the generated image is as follows. Figure 10 As shown in the figure. The waveform numbers from 1 to 10 are as follows: Waveform 1 outer voltage value; Waveform 2 inner voltage value; Waveform 3 output current value; Waveform 4 voltage value at detection point 1; Waveform 5 auxiliary power switch status; Waveform 6 electronic lock status; Waveform 7 DC output contactor status; Waveform 8 access control status; Waveform 9 emergency stop status; Waveform 10 AC relay status.

[0101] The horizontal axis in the figure uses a uniform time axis, with each small square representing 1 second; the vertical axis uses different amplitudes: each square of waveforms 1 and 2 represents 30V, each square of waveform 3 represents 30A, each square of waveform 4 represents 4V, and waveforms 5-10 represent switching states, distinguishing only between high and low levels, without any actual numerical meaning.

[0102] Image analysis: The image shows that waveform 8 changes from high level to low level first during the charging process. Then, within 1 second, the DC contactor of the charger disconnects, and the voltage and current output gradually decrease to 0. The auxiliary power supply stops after about 3 seconds, and finally the electronic lock unlocks after about 5 seconds. Image analysis shows that the charger's start-up and shutdown process conforms to the national standard sequence. The reason for the shutdown is that the access control is disconnected, and there are no other device faults or abnormalities.

[0103] Example 3

[0104] Based on the same inventive concept, the present invention also provides a waveform recording device for fault recording of charging piles, comprising:

[0105] The waveform recording device is installed on the charger to build voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits.

[0106] The voltage and current sampling circuit, the key component status sampling circuit, and the CAN communication monitoring circuit are used to acquire real-time data and communication messages during charging of the charging pile, and to generate a log file from the real-time data.

[0107] The waveform recording device is used to determine whether a startup failure or abnormal shutdown occurs during the charging process, based on the communication messages. When a startup failure or abnormal shutdown occurs, the log data is converted into a waveform image and transmitted to the background along with the log file.

[0108] Optionally, the waveform recording device is installed on the charger to establish voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits, including...

[0109] The positive and negative terminals of the active DI switch input interface configured on the control board of the waveform recording device are connected to the two poles of the linkage auxiliary contact on the charging pile switching device to construct a key device status sampling circuit.

[0110] The communication port of the control board of the waveform recording device is configured on the CAN bus in parallel communication lines to form a CAN communication monitoring loop;

[0111] The sampling port of the control board of the waveform recording device is connected to the positive and negative poles of the DC bus to form a voltage sampling loop;

[0112] The sampling port of the control board of the waveform recording device is connected to both ends of the shunt in the output circuit of the charging pile to form a current sampling circuit;

[0113] The voltage and current sampling circuit includes a voltage sampling circuit and a current sampling circuit.

[0114] Optionally, the voltage and current sampling circuit includes: a voltage sampling circuit and a current sampling circuit;

[0115] The voltage sampling circuit is used to obtain the DC side output voltage of the charging pile and the voltage value of the control guide circuit CC1;

[0116] The current sampling circuit is used to collect the real-time mV voltage across the charging pile shunt and convert the real-time mV voltage across the charging pile shunt into current according to the transformation ratio.

[0117] Optionally, the CAN communication monitoring loop includes:

[0118] Four CAN2.0B communication ports are used to monitor CAN communication data and generate communication messages;

[0119] One 485 communication channel is used to monitor the AC side meter readings and obtain AC side voltage and current data.

[0120] One RS232 communication port is provided for designers to have an internal debugging communication port.

[0121] Optionally, the waveform recording device is specifically used for:

[0122] The startup success is determined by judging the content of the "startup completion status frame" in the communication message through the waveform recording device. If the startup fails, the log generated from the receipt of the "startup command frame" to the receipt of the "startup completion status frame" is converted into a waveform image and stored. Otherwise, if the startup is successful, the abnormal shutdown reason in the "stop completion frame" in the communication between TCU and DCCU when charging stops is detected.

[0123] When an abnormal shutdown occurs, the log data generated during the charging process will be converted into a waveform image.

[0124] When no abnormal shutdown cause is found, the log data generated during the charging process will not be converted into waveform images.

[0125] Example 4

[0126] like Figure 11 As shown, the present invention also provides an electronic device, which may be a computer device, a microcontroller device, a smart mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, processor, and transceiver component are connected via a bus; the memory can be used to store executable programs, and an exemplary executable program may include instructions; the processor is used to execute the instructions stored in the memory. The memory can also be used to store data, which can be accessed and / or modified when instructions are executed.

[0127] The processor may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and it is suitable for implementing one or more instructions. Specifically, it is suitable for loading and executing one or more instructions in the storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of the charging pile fault recording method in the above embodiment.

[0128] Example 5

[0129] Based on the same inventive concept, this invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory). This readable storage medium is a memory device within an electronic device used to store programs and data. It is understood that the storage medium here can include both built-in storage media within the electronic device and extended storage media supported by the electronic device. The storage medium provides storage space, which stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more executable programs (including program code). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk storage device. Loading and executing one or more instructions stored in the storage medium by the processor can implement the steps of the charging pile fault recording method described in the above embodiments.

[0130] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0131] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0132] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0133] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0134] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A method for recording fault waveforms in a charging pile, characterized in that, include: By adding a waveform recording device to the charger, a voltage and current sampling circuit, a key component status sampling circuit, and a CAN communication monitoring circuit are built. Real-time data and communication messages during charging of the charging pile are obtained through voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits, and the real-time data is generated into a log file. The communication messages are analyzed by the waveform recording device to determine whether there is a start-up failure or abnormal shutdown during the charging process. When a start-up failure or abnormal shutdown occurs, the log data is converted into a waveform image and the waveform image and log file are transmitted to the background. The aforementioned method, which establishes voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits using a waveform recording device installed on the charger, includes: Connect the positive and negative terminals of the active DI digital input interface configured on the control board of the waveform recording device to the two poles of the linkage auxiliary contact on the charging pile switching device to construct a key device status sampling circuit. The communication port configured on the control board of the waveform recording device is connected in parallel on the CAN bus to construct a CAN communication monitoring loop; Connect the sampling port configured on the control board of the waveform recording device to the positive and negative poles of the DC bus to construct a voltage sampling circuit; Connect the sampling port configured on the control board of the waveform recording device to both ends of the shunt in the output circuit of the charging pile to construct a current sampling circuit; The voltage and current sampling circuit includes a voltage sampling circuit and a current sampling circuit. The system acquires real-time data and communication messages during charging of the charging pile through voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits, and forms a log file from the real-time data, including: The DC output voltage of the charging pile, the voltage value of the control guide circuit CC1, and the real-time mV voltage at both ends of the charging pile shunt are obtained through the voltage and current sampling circuit, and the real-time mV voltage at both ends of the charging pile shunt is converted into current according to the transformation ratio. The remote signaling status of the switching device is obtained through the key device status sampling circuit, and a communication message is generated. The CAN communication monitoring loop listens to CAN communication data and AC side meter readings, generates communication messages from the CAN communication data, and provides an internal debugging communication port for designers. The chip in the waveform recording device generates a log file containing the DC side output voltage of the charging pile, the voltage value of the control and guidance circuit CC1, the current, and the AC side meter readings. The monitoring circuit listens to CAN communication data and AC side meter readings via CAN communication, generates communication messages from the CAN communication data, and provides an internal debugging communication port for designers, including: The CAN communication data is monitored through the four CAN2.0B communication ports in the CAN communication monitoring loop, and communication messages are generated. The AC side meter readings are monitored via a 485 communication channel to obtain AC side voltage and current data. Internal debugging is performed via one RS232 communication channel; The CAN communication data includes: communication data between the charger and the vehicle, communication data between the internal TCU and the DCCU, and communication data between the DCCU and the charging module. The process of analyzing communication messages using a waveform recording device to determine whether a startup failure or abnormal shutdown occurs during charging, and converting log data into waveform images when such failures or shutdowns occur, includes: The startup success is determined by analyzing the content of the "startup completion status frame" in the communication message using a waveform recording device. If startup fails, the log generated between the receipt of the "startup command frame" and the receipt of the "startup completion status frame" is converted into a waveform image and stored. Otherwise, if startup is successful, the abnormal shutdown cause in the "stop completion frame" communication between the TCU and DCCU when charging stops is detected. When an abnormal shutdown occurs, the log data generated during the charging process will be converted into a waveform image. When no abnormal shutdown cause is found, the log data generated during the charging process will not be converted into waveform images.

2. The method as described in claim 1, characterized in that, The process of acquiring the DC-side output voltage of the charging pile, the voltage value of the control guide circuit CC1, and the real-time mV voltage across the charging pile shunt via a voltage and current sampling circuit, and converting the real-time mV voltage across the charging pile shunt into current according to the transformation ratio, includes: The DC-side output voltage of the charging pile is obtained through the DC voltage sampling port in the voltage and current sampling circuit. The real-time mV voltage across the charging pile shunt is acquired through the DC current sampling port in the voltage and current sampling circuit, and the real-time mV voltage across the charging pile shunt is converted into current according to the transformation ratio. The voltage value of the control guide circuit CC1 is obtained by sampling the control guide voltage in the voltage and current sampling loop.

3. The method as described in claim 1, characterized in that, The process of obtaining the remote signaling status of the switching device through the key device status sampling circuit includes: The remote signaling status of the switching devices connected to the multi-channel active DI digital input interface is obtained through the multi-channel active DI digital input interface in the key device status sampling loop. The switching devices include: DC contactors, AC contactors, auxiliary power relays, electronic locks, and emergency stop devices.

4. The method as described in claim 1, characterized in that, The waveform recording device has a power-off protection function, which delays power-off for 1 minute after the working power supply stops, and records the specific situation before and after the charging pile unexpectedly loses power.

5. The method as described in claim 1, characterized in that, It also includes the ability to directly view logs and waveform images via the LVDS touchscreen in the waveform recording device.

6. A waveform recording device for implementing the fault waveform recording method for charging piles as described in any one of claims 1-5, characterized in that, include: The waveform recording device is installed on the charger to build voltage and current sampling circuits, key component status sampling circuits, and CAN communication monitoring circuits. The voltage and current sampling circuit, the key component status sampling circuit, and the CAN communication monitoring circuit are used to acquire real-time data and communication messages during charging of the charging pile, and to generate a log file from the real-time data. The waveform recording device is used to determine whether a startup failure or abnormal shutdown occurs during the charging process, based on the communication messages. When a startup failure or abnormal shutdown occurs, the log data is converted into a waveform image and transmitted to the background along with the log file.

7. An electronic device, characterized in that, include: At least one processor and memory; The memory and processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a charging pile fault recording method as described in any one of claims 1 to 5 is implemented.

8. A readable storage medium, characterized in that, It contains an execution program, which, when executed, implements a charging pile fault recording method as described in any one of claims 1 to 5.

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