Charging fault detection device and method
By designing a charging fault detection device integrating CAN transceiver module, controller and prompter, the problem of low charging fault efficiency in the existing technology is solved, and fast and efficient troubleshooting is achieved.
Patent Information
- Application Number
- CN202311450794.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-01
- Publication Date
- 2025-05-06
AI Technical Summary
The existing technology requires computers and professional tools when troubleshooting electric vehicle charging failures, which are large in workload and low in efficiency.
A charging fault detection device is designed, including an integrated CAN transceiver module, controller and prompter. It connects the CAN bus through the CAN transceiver module to obtain the message signal between the charging pile and the vehicle. The controller receives the message signal and judges the fault. The prompter prompts the fault condition.
The device can directly troubleshoot the cause of charging failure, reduce the inspection workload and improve efficiency.
Smart Images
Figure CN119936508A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of vehicle charging, and in particular, to a charging fault detection device and method. Background Art
[0002] With the continuous development of vehicle technology and the popularization of electric vehicles, the charging technology of electric vehicles is becoming more and more common. During the charging process, charging failures are often encountered, and the cause needs to be investigated to restore charging.
[0003] In the related art, troubleshooting the cause of a charging failure usually requires a computer and professional tools, such as a CAN (Controller Area Network) bus analyzer. By connecting a USBCAN converter to a computer and then having professional technicians perform analysis, troubleshooting the cause of a charging failure is labor-intensive and inefficient. Summary of the invention
[0004] The purpose of the present disclosure is to provide a charging fault detection device and method to solve the problems in the related art.
[0005] In order to achieve the above-mentioned object, according to a first aspect of an embodiment of the present disclosure, a charging fault detection device is provided, wherein the charging fault detection device comprises an integrated CAN transceiver module, a controller and a prompter; wherein:
[0006] A CAN transceiver module, which is used to connect to a CAN bus and obtain message signals exchanged between a charging pile and a vehicle on the CAN bus;
[0007] A controller, the controller is connected to the CAN transceiver module, and the controller is used to receive the message signal sent by the CAN transceiver module;
[0008] A reminder, the reminder is connected to the controller, and the reminder is used to remind the charging pile of a failure in charging the vehicle.
[0009] Optionally, the charging fault detection device further includes:
[0010] A first isolation module, wherein the first isolation module is connected between the CAN transceiver module and the controller, and the first isolation module is used to electrically isolate the message signal.
[0011] Optionally, the first isolation module includes an isolation optocoupler.
[0012] Optionally, the charging fault detection device further includes:
[0013] A power module, the power module is connected to the CAN transceiver module, the controller, the prompter and the first isolation module, and the power module is used to supply power to the CAN transceiver module, the controller, the prompter and the first isolation module.
[0014] Optionally, the power module includes:
[0015] A DC / DC converter, wherein the DC / DC converter is connected to the CAN transceiver module, the controller, the prompter and the first isolation module, and the DC / DC converter is used to convert electrical energy to power the CAN transceiver module, the controller, the prompter and the first isolation module.
[0016] Optionally, the power module further includes:
[0017] A second isolation module, wherein the second isolation module is connected between the DC / DC converter and the first isolation module, and is used for isolating the electric energy transmitted by the DC / DC converter and providing the electric energy to the first isolation module.
[0018] Optionally, the power module includes a battery pack.
[0019] Optionally, the prompter includes a display screen.
[0020] According to a second aspect of an embodiment of the present disclosure, a charging pile fault detection method is provided, which is applied to a controller in any charging fault detection device provided in the first aspect of the present disclosure, and the charging pile fault detection method includes:
[0021] Receiving a message signal sent by the CAN transceiver module, and determining whether a charging failure occurs according to the message signal;
[0022] When it is determined that a charging failure occurs, the reminder is controlled to give a reminder.
[0023] Optionally, the message signal includes a message ID and message data, and judging whether a charging failure occurs according to the message signal includes:
[0024] Determine the current charging stage according to the message ID;
[0025] Parsing the message data to obtain parsed data;
[0026] Whether a charging failure occurs is determined based on the analyzed data and preset data corresponding to the current charging stage.
[0027] Optionally, the message signal includes a message ID, and determining whether a charging failure occurs according to the message signal includes:
[0028] Determine the current charging stage according to the message ID;
[0029] Obtaining a timestamp of receiving the message signal;
[0030] Whether a charging failure occurs is determined based on the timestamp of the message signal and the preset time interval corresponding to the current charging stage.
[0031] Through the above technical solution, the CAN transceiver module is used to connect to the CAN bus, and is used to obtain the message signal of the interaction between the charging pile and the vehicle on the CAN bus. The controller is connected to the CAN transceiver module, and is used to receive the message signal sent by the CAN transceiver module. The prompter is connected to the controller, and the prompter is used to prompt the charging pile of the vehicle. The charging fault detection device integrated by the CAN transceiver module, the controller and the prompter can directly check the cause of the charging fault, reducing the workload of the charging fault cause troubleshooting and improving the troubleshooting efficiency.
[0032] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0034] Figure 1 The figure is a schematic diagram of charging fault detection according to an exemplary embodiment.
[0035] Figure 2 The figure is a block diagram of a charging fault detection device according to an exemplary embodiment.
[0036] Figure 3 is a block diagram of another charging fault detection device according to an exemplary embodiment.
[0037] Figure 4 The figure is a flow chart showing a charging fault detection method according to an exemplary embodiment.
[0038] Figure 5 According to an exemplary embodiment, Figure 4 A sub-step flowchart of step S1 in FIG.
[0039] Figure 6 According to an exemplary embodiment, Figure 4 Another sub-step flowchart of step S1 in FIG.
[0040] Figure 7The figure is a schematic diagram of a controller interrupt program according to an exemplary embodiment.
[0041] Figure 8 is a schematic diagram of a main program of a controller according to an exemplary embodiment.
[0042] Fig. 9 The present invention is a schematic diagram of a display screen according to an exemplary embodiment.
[0043] Fig.10 is another display schematic diagram of a display screen according to an exemplary embodiment.
[0044] Fig.11 is another display schematic diagram of a display screen according to an exemplary embodiment.
[0045] Description of Reference Numerals
[0046] 10-charging pile; 20-vehicle; 21-CAN bus; 30-charging fault detection device; 31-CAN transceiver module; 32-controller; 33-prompter; 34-first isolation module; 35-power module; 36-DC / DC converter; 37-second isolation module; 40-USBCAN converter; 50-computer. DETAILED DESCRIPTION
[0047] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0048] In the description below, words such as “first” and “second” are only used for the purpose of distinguishing the description and should not be understood as indicating or implying relative importance or order.
[0049] Before introducing the specific implementation of the present disclosure, first, the application scenario of the present disclosure is described.
[0050] With the continuous development of vehicle technology and the popularization of electric vehicles, the charging technology of electric vehicles is becoming more and more common. During the charging process, charging failures are often encountered, and the cause needs to be investigated to restore charging.
[0051] In related technologies, troubleshooting the cause of charging failure usually requires a computer and professional tools, such as a USBCAN converter, see Figure 1 By connecting the USBCAN converter 40 to the computer 50 and then having professional technicians perform analysis, the workload of troubleshooting the cause of the charging failure is large and the efficiency is low.
[0052] In order to solve the above technical problems, the CAN transceiver module 31 is used to connect to the CAN bus 21 to obtain the message signal exchanged between the charging pile 10 and the vehicle 20 on the CAN bus 21, the controller 32 is connected to the CAN transceiver module 31 to receive the message signal sent by the CAN transceiver module 31, and the prompter 33 is connected to the controller 32, and the prompter 33 is used to prompt the charging pile 10 to charge the vehicle 20. The charging fault detection device 30 integrated with the CAN transceiver module 31, the controller 32 and the prompter 33 can directly check the cause of the charging fault, reduce the workload of the charging fault cause troubleshooting, and improve the troubleshooting efficiency.
[0053] See also Figure 2 , Figure 2 1 is a block diagram of a charging fault detection device according to an exemplary embodiment. The charging gun of the charging pile 10 realizes information exchange with the vehicle 20 through the CAN bus 21 of the vehicle 20. The charging fault detection device 30 includes an integrated CAN transceiver module 31, a controller 32 and a prompter 33.
[0054] The CAN transceiver module 31 is used to connect to the CAN bus 21 and to obtain the message signal exchanged between the charging pile 10 and the vehicle 20 on the CAN bus 21 .
[0055] The controller 32 is connected to the CAN transceiver module 31 , and is used for receiving the message signal sent by the CAN transceiver module 31 .
[0056] The prompter 33 is connected to the controller 32 , and is used to prompt a fault in the charging of the vehicle 20 by the charging pile 10 .
[0057] The controller 32 receives the message signal sent by the CAN transceiver module 31 and determines whether a charging failure occurs according to the message signal. In the case of a charging failure, the controller 32 prompts the charging failure and the cause of the failure through the prompter 33.
[0058] The controller 32 may be a micro control unit (MCU) or a single chip microcomputer.
[0059] The prompter 33 can be, but is not limited to, a buzzer, a light alarm, a display screen, etc.
[0060] For example, when the reminder 33 is a buzzer, the buzzer sound can represent a charging fault, and different frequencies of buzzers can represent different causes of the charging fault. When the reminder 33 is a light alarm, the light alarm can represent a charging fault, and different light colors can represent different causes of the charging fault. The number of lights on the light alarm can also represent different causes of the charging fault. When the reminder 33 is a display screen, the display screen can display the charging fault and the cause of the fault.
[0061] The charging fault detection device 30 integrated with the CAN transceiver module 31, the controller 32 and the prompter 33 can directly check the cause of the charging fault, thereby reducing the workload of checking the cause of the charging fault and improving the checking efficiency.
[0062] In one possible implementation, see Figure 3 , the charging fault detection device 30 may further include:
[0063] The first isolation module 34 is connected between the CAN transceiver module 31 and the controller 32 . The first isolation module 34 is used to electrically isolate the message signal.
[0064] For example, the first isolation module 34 may include an isolation optical coupler. The first isolation module 34 electrically isolates the message signal, thereby improving the reliability of the CAN transceiver module 31 .
[0065] In a possible implementation manner, the charging fault detection device 30 further includes:
[0066] The power module 35 is connected to the CAN transceiver module 31 , the controller 32 , the prompter 33 and the first isolation module 34 . The power module 35 is used to supply power to the CAN transceiver module 31 , the controller 32 , the prompter 33 and the first isolation module 34 .
[0067] Please continue reading Figure 3 , the power module 35 may include:
[0068] The DC / DC converter 36 is connected to the CAN transceiver module 31, the controller 32, the prompter 33 and the first isolation module 34. The DC / DC converter 36 is used to convert electrical energy to power the CAN transceiver module 31, the controller 32, the prompter 33 and the first isolation module 34.
[0069] The power supplied by the external power supply is converted into voltage through the DC / DC converter 36 to power the CAN transceiver module 31, the controller 32, the prompter 33 and the first isolation module 34. For example, the external power supply can be a 9-36V voltage source, which is converted into 5V or 3.3V through the DC / DC converter 36.
[0070] In other embodiments, the power module 35 also includes other voltage conversion circuits, such as a low dropout regulator (Low Dropout Regulator, LDO).
[0071] In a possible implementation manner, in order to enhance the anti-interference capability, the power module 35 further includes:
[0072] The second isolation module 37 is connected between the DC / DC converter 36 and the first isolation module 34 . The second isolation module 37 is used to isolate the electric energy transmitted by the DC / DC converter 36 and provide the electric energy to the first isolation module 34 .
[0073] For example, the second isolation module 37 may be an isolation DC / DC, and its specific model may be B0505S.
[0074] In other embodiments, the second isolation module 37 may also be connected to the CAN transceiver module 31 to isolate the electric energy transmitted by the DC / DC converter 36 and provide the electric energy to the CAN transceiver module 31 .
[0075] In a possible implementation, the power module 35 also includes a battery pack.
[0076] The battery pack supplies power to the CAN transceiver module 31 , the controller 32 , the prompter 33 and the first isolation module 34 .
[0077] In a possible implementation, the prompter 33 includes a display screen.
[0078] The display can show the fault and the reason for the charging fault.
[0079] For example, the display screen may also be a touch screen, and operations may be performed directly on the touch screen, such as page switching. It may also be used in conjunction with a key, which is not limited in this embodiment.
[0080] It should be understood that the charging fault detection device 30 may also include some other peripheral circuits, and the other peripheral circuits are connected to the controller 32 to achieve corresponding functions.
[0081] See also Figure 4 , Figure 4 : is a flow chart of a charging fault detection method according to an exemplary embodiment. The charging fault detection method is applied to the controller in the above-mentioned charging fault detection device, and the charging pile fault detection method may include step S1 and step S2:
[0082] Step S1, receiving a message signal sent by a CAN transceiver module, and determining whether a charging failure occurs according to the message signal.
[0083] Step S2, when it is determined that a charging failure occurs, the prompter is controlled to give a prompt.
[0084] The controller receives the message signal sent by the CAN transceiver module, and determines whether a charging failure occurs based on the message signal. In the event of a charging failure, the controller prompts the charging failure and the cause of the failure through a reminder.
[0085] In a possible implementation manner, the message signal includes a message ID and message data, see Figure 5 In step S1, judging whether a charging failure occurs according to the message signal may include steps S11 to S13:
[0086] Step S11, determining the current charging stage according to the message ID.
[0087] Step S12, parsing the message data to obtain parsed data.
[0088] Step S13, judging whether a charging failure occurs according to the analyzed data and preset data corresponding to the current charging stage.
[0089] The charging stage can be, but is not limited to, waiting for handshake message, handshake stage, insulation detection, configuration stage, charging stage, stop stage, statistics stage, timeout reconnection, etc. For each charging stage, a different message ID is set, and the current charging stage can be determined by the message ID.
[0090] The analyzed data may be voltage data, current data, etc.
[0091] Different charging stages correspond to different preset data. The analyzed data is compared with the preset data corresponding to the current charging stage. When the value of the analyzed data does not fall within the range specified by the preset data, it is determined that a charging failure has occurred, and the specific cause of the failure is prompted, such as voltage out of range, current out of range, voltage too low, voltage too high, current too low, current too high, etc.
[0092] It should be understood that the display screen can also display the analyzed data.
[0093] In a possible implementation, the message signal includes a message ID, see Figure 6 In step S1, judging whether a charging failure occurs according to the message signal may include steps S14 to S16:
[0094] Step S14, determining the current charging stage according to the message ID.
[0095] Step S15, obtaining the timestamp of the received message signal.
[0096] Step S16, judging whether a charging failure occurs according to the timestamp of the message signal and the preset time interval corresponding to the current charging stage.
[0097] The charging stage can be, but is not limited to, waiting for handshake message, handshake stage, insulation detection, configuration stage, charging stage, stop stage, statistics stage, timeout reconnection, etc. For each charging stage, a different message ID is set, and the current charging stage can be determined by the message ID.
[0098] Obtain the timestamp of the received message information, subtract the timestamps of adjacent message information, and you can get the time interval of adjacent message information. If the time interval is greater than the preset time interval corresponding to the current charging stage, it is determined that the charging has failed and the specific cause of the failure is prompted. For example, the vehicle end timed out to send the message, the charging pile timed out, etc.
[0099] See also Figure 7 and Figure 8 , the main program and CAN receive interrupt program can be run on the controller.
[0100] 1. CAN receiving interrupt program:
[0101] During the chip power-on initialization phase, the CAN baud rate is configured to 250kBPS, CAN receive interrupt and offline self-recovery, etc.
[0102] When the charging pile or vehicle sends a message frame on the CAN bus, the CAN receive interrupt program of the controller in the charging fault detection device will be triggered. In this program, the message data is first read from the register, and then the data is stored and loaded into the software buffer. At the same time, the receive interrupt flag is cleared and waits for the next message data to be received.
[0103] 2. Main program
[0104] The main program is executed in a loop at a certain period (e.g. 5ms). The program includes reading the software CAN buffer, judging the current charging stage (waiting for handshake message, handshake stage, insulation detection, configuration stage, charging stage, stop stage, statistics stage, timeout reconnection, etc.) according to the message ID, and displaying it on the screen.
[0105] The message parsing unit parses the CAN message data into recognizable text information according to the national standard text definition, which serves as the basis for testers to analyze problems.
[0106] Message cycle calculation unit: Statistics the timestamp of the first message received, the time interval between two identical PGNs, the maximum interval, the minimum interval, the current interval, the cumulative number of receptions, and whether the evaluation is appropriate in accordance with national standards. According to national standards, in the non-charging stage, the message timeout is generally 5000ms. If an occasional timeout of 1000ms occurs, it does not affect charging. After using this device, it is possible to more accurately monitor whether frame loss has occurred and detect whether there are potential faults in the charging system.
[0107] Screen display processing unit: The microcontroller can drive the display unit through any interface such as RGB, SPI, serial port, etc., and intuitively display the content through various pictures and texts. For example, Fig. 9 , Fig.10 and Fig.11 .
[0108] Screen touch processing unit: scans the touch points of the screen through an external expansion chip, or obtains the current touch coordinates through other interfaces, and performs corresponding actions.
[0109] Fault processing unit: judges the fault condition and status of the message in real time, and mainly implements three situations: status indication, alarm prompt, and fault analysis.
[0110] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0111] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0112] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A charging fault detection device, characterized in that: The charging fault detection device includes an integrated CAN transceiver module, a controller and a prompter; wherein, A CAN transceiver module, which is used to connect to a CAN bus and obtain message signals exchanged between a charging pile and a vehicle on the CAN bus; A controller, the controller is connected to the CAN transceiver module, and the controller is used to receive the message signal sent by the CAN transceiver module; A reminder, the reminder is connected to the controller, and the reminder is used to remind the charging pile of a failure in charging the vehicle.
2. The charging fault detection device according to claim 1, characterized in that: The charging fault detection device also includes: A first isolation module, wherein the first isolation module is connected between the CAN transceiver module and the controller, and the first isolation module is used to electrically isolate the message signal.
3. The charging fault detection device according to claim 2, characterized in that: The first isolation module includes an isolation optocoupler.
4. The charging fault detection device according to claim 2, characterized in that: The charging fault detection device also includes: A power module, the power module is connected to the CAN transceiver module, the controller, the prompter and the first isolation module, and the power module is used to supply power to the CAN transceiver module, the controller, the prompter and the first isolation module.
5. The charging fault detection device according to claim 4, characterized in that: The power module comprises: A DC / DC converter, wherein the DC / DC converter is connected to the CAN transceiver module, the controller, the prompter and the first isolation module, and the DC / DC converter is used to convert electrical energy to power the CAN transceiver module, the controller, the prompter and the first isolation module.
6. The charging fault detection device according to claim 5, characterized in that: The power module also includes: A second isolation module, wherein the second isolation module is connected between the DC / DC converter and the first isolation module, and is used for isolating the electric energy transmitted by the DC / DC converter and providing the electric energy to the first isolation module.
7. The charging fault detection device according to claim 4, characterized in that: The power module includes a battery pack.
8. The charging fault detection device according to claim 1, characterized in that: The prompter includes a display screen.
9. A charging pile fault detection method, characterized in that: A controller used in a charging fault detection device according to any one of claims 1 to 8, wherein the charging pile fault detection method comprises: Receiving a message signal sent by the CAN transceiver module, and determining whether a charging failure occurs according to the message signal; When it is determined that a charging failure occurs, the reminder is controlled to give a reminder.
10. The charging pile fault detection method according to claim 9, characterized in that: The message signal includes a message ID and message data, and judging whether a charging failure occurs according to the message signal includes: Determine the current charging stage according to the message ID; Parsing the message data to obtain parsed data; Whether a charging failure occurs is determined based on the analyzed data and preset data corresponding to the current charging stage.
11. The charging pile fault detection method according to claim 9, characterized in that: The message signal includes a message ID, and judging whether a charging failure occurs according to the message signal includes: Determine the current charging stage according to the message ID; Obtaining a timestamp of receiving the message signal; Whether a charging failure occurs is determined based on the timestamp of the message signal and the preset time interval corresponding to the current charging stage.