Early warning method and device for vehicle charging interface, electronic equipment and storage medium

Abstract

The invention discloses an early warning method and device for a vehicle charging interface, electronic equipment and a storage medium, and relates to the technical field of vehicle detection. The test content comprises test parameter configuration, connection state test, communication performance test and charging guide process monitoring; parameter configuration is carried out through an upper computer, and specific testing of the connection state is carried out through a relay set and an acquisition control board. The communication performance is evaluated through the CAN test unit and the data analysis processing module; after determining that all connections are normal, starting a charging guide process through a mode switching circuit, and meanwhile, continuously monitoring and evaluating the communication performance of the CAN bus; the auxiliary early warning sensor monitors the input power supply voltage in real time and provides early warning information through the indicator lamp and the buzzer according to the matching condition of the input power supply voltage and the low-voltage power supply voltage of the electric vehicle.

Description

Technical Field

[0001] The present application relates to the field of vehicle detection technology, and in particular to an early warning method, device, electronic device and storage medium for a vehicle charging interface. Background Art

[0002] With the rapid development of the electric vehicle industry, the construction of charging infrastructure and the improvement of charging technology have become key factors in promoting the popularization of electric vehicles. There are two main ways to charge electric vehicles: AC charging and DC charging. DC charging has attracted widespread attention for its high power and fast charging advantages. However, during the charging process, communication and compatibility issues between the charger and the electric vehicle have gradually become prominent, becoming an important factor affecting charging efficiency and user experience.

[0003] At present, the charging communication method based on CAN bus or other communication protocols is generally used in the charging system of electric vehicles on the market to realize the information exchange and charging control between the charger and the electric vehicle. In order to ensure the safety and compatibility of charging, various countries and industry organizations have formulated relevant charging standards and protocols. These standards stipulate the physical specifications, communication protocols, safety requirements and other contents of the charging interface, providing a basis for the design and testing of electric vehicle charging systems.

[0004] However, in actual applications, communication and compatibility issues between chargers and electric vehicles still occur from time to time. These problems may be caused by abnormal physical connection of the charging interface, inconsistent communication protocols, errors in software algorithms, etc. These problems will not only affect the charging efficiency and user experience, but may also cause damage to electric vehicles and charging equipment, and even cause safety accidents. Summary of the invention

[0005] The purpose of this application is to provide a warning method, device, electronic device and storage medium for a vehicle charging interface.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides an early warning method for a vehicle charging interface, comprising:

[0008] The DC charging interface of electric vehicles is tested using the test system. The test contents include test parameter configuration, connection status test, communication performance test and charging guidance process monitoring.

[0009] Parameters are configured through the host computer, and the relay group and acquisition control board are used to conduct specific tests on the connection status;

[0010] Evaluate communication performance through CAN test unit and data analysis and processing module;

[0011] After confirming that all connections are normal, the charging boot process is started through the mode switching circuit, while continuously monitoring and evaluating the communication performance of the CAN bus;

[0012] The auxiliary warning sensor monitors the input power supply voltage in real time, and provides warning information through indicator lights and buzzers according to the matching of the input power supply voltage with the low-voltage power supply voltage of the electric vehicle.

[0013] Optionally, the early warning method of the vehicle charging interface further includes:

[0014] The test system is constructed, and the test system at least includes: an integrated test system socket, a test system plug, a mode switching circuit, a CAN test unit, a relay group, an acquisition control board and a host computer, wherein the acquisition control board is electrically connected to the relay group.

[0015] Optionally, the step of performing parameter configuration by a host computer includes:

[0016] The rated voltage and rated current of the non-on-board charger to be tested, as well as the rated voltage, battery capacity and peak power of the electric vehicle power battery pack to be tested are input through the host computer, and the voltage level of the test system is set. At the same time, the mode switching circuit is disconnected to prepare for entering the test phase.

[0017] Optionally, the connection status test includes:

[0018] By controlling the closure of specific contacts of the relay group, different test paths are selectively activated;

[0019] The acquisition control board is used to capture the potential change of a specific sampling point to obtain the potential value;

[0020] Whether the connection status of each contact between the vehicle plug of the off-board charger and the test system socket, and between the vehicle socket of the electric vehicle and the test system plug is normal is determined according to the potential value.

[0021] Optionally, the communication performance test includes:

[0022] Using the virtual BMS module and the off-board charger communication module, periodically send communication handshake messages according to the preset communication protocol to establish a stable communication connection with the device under test;

[0023] Simulate the actual charging demand scenario, send charging demand communication messages, and monitor the communication message content on the CAN bus in real time through the CAN test unit;

[0024] The communication performance is evaluated by analyzing the captured communication messages through the data analysis and processing module.

[0025] Optionally, the charging boot process monitoring includes:

[0026] During the charging boot phase, the communication status of the CAN bus is tracked through the CAN test unit, and the ground level and line-to-line level information of the charging communication line are collected. The evaluation information is used to evaluate the communication performance.

[0027] Optionally, the step of providing warning information through an indicator light and a buzzer includes:

[0028] When it is detected that the charging interface connection is abnormal or the communication performance is not up to standard, the warning device is triggered by the host computer, the warning indicator light is lit and the buzzer is started.

[0029] In a second aspect, the present application provides an early warning device for a vehicle charging interface, comprising:

[0030] A test module is used to test the DC charging interface of the electric vehicle using the test system. The test content includes test parameter configuration, connection status test, communication performance test and charging boot process monitoring;

[0031] The processing module is used to configure parameters through the host computer and perform specific tests on the connection status using the relay group and the acquisition control board;

[0032] Evaluate communication performance through CAN test unit and data analysis and processing module;

[0033] After confirming that all connections are normal, the charging boot process is started through the mode switching circuit, while continuously monitoring and evaluating the communication performance of the CAN bus;

[0034] The early warning module is used to assist the early warning sensor in real-time monitoring of the input power supply voltage, and provide early warning information through indicator lights and buzzers according to the matching situation between the input power supply voltage and the low-voltage power supply voltage of the electric vehicle.

[0035] Optionally, the test module is further used to:

[0036] The test system is constructed, and the test system at least includes: an integrated test system socket, a test system plug, a mode switching circuit, a CAN test unit, a relay group, an acquisition control board and a host computer, wherein the acquisition control board is electrically connected to the relay group.

[0037] Optionally, the test module is further used to:

[0038] The rated voltage and rated current of the non-on-board charger to be tested, as well as the rated voltage, battery capacity and peak power of the electric vehicle power battery pack to be tested are input through the host computer, and the voltage level of the test system is set. At the same time, the mode switching circuit is disconnected to prepare for entering the test phase.

[0039] Optionally, the test module is further used to:

[0040] By controlling the closure of specific contacts of the relay group, different test paths are selectively activated;

[0041] The acquisition control board is used to capture the potential change of a specific sampling point to obtain the potential value;

[0042] Whether the connection status of each contact between the vehicle plug of the off-board charger and the test system socket, and between the vehicle socket of the electric vehicle and the test system plug is normal is determined according to the potential value.

[0043] Optionally, the test module is further used to:

[0044] Using the virtual BMS module and the off-board charger communication module, periodically send communication handshake messages according to the preset communication protocol to establish a stable communication connection with the device under test;

[0045] Simulate the actual charging demand scenario, send charging demand communication messages, and monitor the communication message content on the CAN bus in real time through the CAN test unit;

[0046] The communication performance is evaluated by analyzing the captured communication messages through the data analysis and processing module.

[0047] Optionally, the test module is further used to:

[0048] During the charging boot phase, the communication status of the CAN bus is tracked through the CAN test unit, and the ground level and line-to-line level information of the charging communication line are collected. The evaluation information is used to evaluate the communication performance.

[0049] Optionally, the early warning module is further used to:

[0050] When it is detected that the charging interface connection is abnormal or the communication performance is not up to standard, the warning device is triggered by the host computer, the warning indicator light is lit and the buzzer is started.

[0051] In a third aspect, the present application provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the early warning method for a vehicle charging interface described in any one of the above.

[0052] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-mentioned methods for warning a vehicle charging interface.

[0053] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods for warning a vehicle charging interface.

[0054] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0055] The present application provides an early warning method, device, electronic device and storage medium for a vehicle charging interface. Through the test process of parameter configuration, connection status test, communication performance test and charging guidance process monitoring, the stability and reliability of the DC charging interface of an electric vehicle under various working conditions can be ensured, and potential voltage mismatch problems can be discovered and warned in a timely manner, thereby improving charging safety, optimizing charging performance, and ultimately simplifying the fault handling process, and promoting the standardization and intelligent management of charging interfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 A schematic diagram of a process flow of a vehicle charging interface warning method provided in one embodiment of the present application;

[0058] Figure 2 A schematic diagram of functional modules of a warning device for a vehicle charging interface provided in one embodiment of the present application;

[0059] Figure 3 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] like Figure 1 As shown, some embodiments of the present application provide a vehicle charging interface early warning method, which includes the following steps 101 to 104. Among them:

[0062] Step 101, using a test system to test the DC charging interface of the electric vehicle, the test content includes test parameter configuration, connection status test, communication performance test and charging guidance process monitoring;

[0063] In the embodiment of the present application, before the test begins, the test system needs to be configured with detailed parameters through the host computer (i.e., the computer system that controls and manages the test process) according to the specific parameters of the electric vehicle and the non-on-board charger to be tested (such as rated voltage, rated current, battery capacity, etc.). These configurations ensure that the test conditions are consistent with the actual application scenarios, thereby ensuring the accuracy and effectiveness of the test results.

[0064] The physical connection status of the charging interface is tested using a relay group and a collection control board. The relay group simulates different connection conditions by controlling the on and off of the circuit, while the collection control board is responsible for collecting and processing the connection status information from the interface. The test content includes checking whether the contact of the interface contacts is good, whether there are abnormal conditions such as short circuit or open circuit.

[0065] The communication performance between the charging interface and the electric vehicle BMS (battery management system) is evaluated through the CAN test unit (used to monitor and record the communication data on the CAN bus) and the data analysis and processing module (processing and analyzing the collected communication data). The test content includes whether the sending and receiving of communication messages are normal, whether the communication rate meets the requirements, and whether there are communication errors or delays.

[0066] After confirming that all connections are normal, the charging boot process is started through the mode switching circuit. This process involves establishing a charging connection, negotiating charging parameters, and starting actual charging. At the same time, the communication performance of the CAN bus is continuously monitored and evaluated to ensure smooth information transmission and accuracy of processing during the charging process.

[0067] Step 102, parameter configuration is performed through the host computer, and a specific test of the connection status is performed using the relay group and the acquisition control board;

[0068] In the embodiment of the present application, the host computer serves as the control center of the test system and is responsible for configuring and managing the test process according to the test requirements and the specific parameters of the device under test. The relay group simulates different connection states by accurately controlling the on and off of the circuit, while the acquisition control board collects the connection status information of the interface in real time, such as voltage, current, resistance and other parameters, for subsequent analysis and judgment.

[0069] Step 103, evaluating the communication performance through the CAN test unit and the data analysis and processing module;

[0070] In the embodiment of the present application, the CAN test unit is responsible for monitoring and recording the communication data on the CAN bus, and the data analysis and processing module performs in-depth analysis and processing on these data to evaluate various indicators of communication performance.

[0071] Step 104, after confirming that all connections are normal, the charging boot process is started through the mode switching circuit, while continuously monitoring and evaluating the communication performance of the CAN bus;

[0072] In the embodiment of the present application, after confirming that all connections are normal, the mode switching circuit switches to the charging mode and starts the charging boot process. During this process, the system continuously monitors the charging status and the communication performance of the CAN bus.

[0073] Step 105, the auxiliary warning sensor monitors the input power supply voltage in real time, and provides warning information through an indicator light and a buzzer according to the matching condition between the input power supply voltage and the low-voltage power supply voltage of the electric vehicle.

[0074] In the embodiment of the present application, the auxiliary warning sensor is responsible for monitoring the changes in the input power supply voltage in real time and comparing it with the low-voltage power supply voltage of the electric vehicle. Once a mismatch or abnormality is found between the two, the sensor will immediately trigger the warning mechanism to remind the operator to pay attention and take corresponding measures through the flashing of the indicator light and the alarm sound of the buzzer. This function helps to timely discover and deal with potential charging failures and safety hazards.

[0075] The embodiment of the present application can ensure the stability and reliability of the DC charging interface of the electric vehicle under various working conditions through the test process of parameter configuration, connection status test, communication performance test and charging guidance process monitoring, and timely discover and warn of potential voltage mismatch problems, thereby improving charging safety, optimizing charging performance, and ultimately simplifying the fault handling process, and promoting the standardization and intelligent management of charging interfaces.

[0076] Optionally, the early warning method of the vehicle charging interface also includes: constructing the test system, the test system at least including: an integrated test system socket, a test system plug, a mode switching circuit, a CAN test unit, a relay group, an acquisition control board and a host computer, wherein the acquisition control board is electrically connected to the relay group.

[0077] In an embodiment of the present application, an integrated test system socket is used to simulate the charging interface of an electric vehicle and perform a connection test with an actual charging gun (non-onboard charger vehicle plug).

[0078] The test system plug is used to simulate the charging gun (non-onboard charger vehicle plug) and perform connection testing with the charging interface (integrated test system socket) on the electric vehicle side.

[0079] The mode switching circuit is used to switch between the test mode and the actual charging mode to ensure that the actual charging system is not disturbed during the test process.

[0080] The CAN test unit is used to monitor and analyze the communication messages on the CAN bus and evaluate the communication performance between the charging interface and the electric vehicle BMS (battery management system) or off-board charger controller.

[0081] The relay group, including the left normally open relay group and the right normally open relay group, is used to control the connection and disconnection of different circuits in the test system to achieve independent testing of each contact.

[0082] The acquisition control board is electrically connected to the relay group, and includes components such as a switch logic control module, a sampling resistor, a sampling point, a normally open switch, and a DC voltage source. It is used to collect parameters such as voltage and current during the test process, and is connected to the relay group through pins to achieve precise control of the test process.

[0083] As the control center of the test system, the host computer is responsible for parameter configuration, data acquisition, data analysis and processing, as well as the display and output of test results. The host computer usually includes a virtual BMS module, a virtual off-board charger communication module, a data acquisition module, and a data analysis and processing module.

[0084] Optionally, the step of performing parameter configuration through the host computer includes: inputting the rated voltage and rated current of the non-on-board charger to be tested, and the rated voltage, battery capacity and peak power of the electric vehicle power battery pack to be tested through the host computer, and setting the voltage level of the test system, while disconnecting the mode switching circuit to prepare for entering the test phase.

[0085] In an embodiment of the present application, the host computer is the control center of the test system, usually a computer or a special test instrument, which is used to input test parameters, control the test process, and collect and analyze test data. That is, the rated voltage and rated current of the charging equipment to be tested are important parameters for the test. The rated voltage refers to the voltage value that the charger should provide when it is working normally, and the rated current is the maximum current value that the charger can provide at the rated voltage. Through the host computer interface, the tester needs to input the rated voltage and rated current of the non-on-board charger to be tested so that the test system can test according to these parameters.

[0086] The electric vehicle power battery pack to be tested is the electric vehicle battery system to be tested. Its rated voltage, battery capacity and peak power are key parameters that reflect battery performance. The rated voltage is the voltage value that the battery pack should reach when working normally. The battery capacity is the total amount of electrical energy that the battery pack can store, usually in ampere-hours (Ah). The peak power is the maximum power that the battery pack can provide in a short period of time, reflecting the discharge capacity of the battery pack. These parameters also need to be input into the test system through the host computer so that the system can simulate the battery behavior during the actual charging process.

[0087] According to the parameters of the off-board charger and electric vehicle power battery pack to be tested, the test system needs to set the corresponding voltage level to ensure the safety and accuracy of the test process. Through the host computer interface, the tester can set the voltage level of the test system to match the rated voltage of the device to be tested.

[0088] In the test system, the mode switching circuit is used to switch between the test mode and the actual charging mode. During the test phase, it is necessary to ensure that the test system is in the test mode to avoid interference or damage to the actual charging system. Through host computer control or manual operation, the tester needs to disconnect the mode switching circuit to put the test system into the test mode. After completing all the above settings, the test system is ready to enter the test phase and start various tests on the non-onboard charger and electric vehicle power battery pack to be tested.

[0089] Optionally, the connection status test includes:

[0090] Step 201, selectively activating different test paths by controlling specific contacts of the relay group to close;

[0091] Step 202, using the acquisition control board to capture the potential change of a specific sampling point to obtain a potential value;

[0092] Step 203 , judging whether the connection status of each contact between the vehicle plug of the off-board charger and the test system socket, and between the vehicle socket of the electric vehicle and the test system plug is normal according to the potential value.

[0093] In an embodiment of the present application, in the test system, the relay group acts as a switch and can control the on and off of the circuit. The relay group includes a plurality of relays, each of which has corresponding contacts. According to the test requirements, by controlling the closure of specific contacts in the relay group, a specific circuit path can be formed to test different parts of the charging interface. By closing different relay contacts, different test paths can be flexibly selected and activated, thereby achieving a comprehensive test of each contact and function of the charging interface.

[0094] The acquisition control board is a core component in the test system, responsible for collecting and processing test data. The acquisition control board is equipped with multiple sampling points, which are connected to the test circuit. When the test path is activated, current or voltage will flow through these sampling points, causing the potential to change. The acquisition control board can capture these potential changes in real time. Through the processing of the acquisition control board, the captured potential changes can be converted into specific potential values, which reflect the actual voltage or current conditions of each contact in the test circuit.

[0095] By analyzing the collected potential values, the voltage or current of each contact in the test circuit can be understood. According to the size and stability of the potential value and its relative relationship with other contacts, it can be judged whether the connection status of each contact between the off-board charger vehicle plug and the test system socket, and between the electric vehicle vehicle socket and the test system plug is normal. For example, if the potential value of a contact is abnormal (such as too high, too low or fluctuating greatly), it may indicate that the contact has problems such as poor connection, short circuit or open circuit.

[0096] Optionally, the communication performance test includes:

[0097] Step 301, using the virtual BMS module and the off-board charger communication module, periodically sending communication handshake messages according to a preset communication protocol to establish a stable communication connection with the device under test;

[0098] Step 302, simulating an actual charging demand scenario, sending a charging demand communication message, and monitoring the communication message content on the CAN bus in real time through a CAN test unit;

[0099] Step 303: Analyze the captured communication messages through the data analysis and processing module to evaluate the communication performance.

[0100] In an embodiment of the present application, in a test environment, the virtual BMS module simulates the actual battery management system in an electric vehicle, and is responsible for sending battery status information, receiving charging control instructions, etc. The off-board charger communication module simulates the communication part of the off-board charger (i.e., charging pile), and is responsible for communicating with the BMS in the electric vehicle or test system. In order to ensure smooth communication, the test system adopts a preset communication protocol, which specifies the format, content, and sending timing of the communication message. In order to establish a stable communication connection, the virtual BMS module and the off-board charger communication module will periodically send communication handshake messages according to the preset communication protocol. This is a message used to confirm the communication status of both parties, establish a connection, and synchronize information. By periodically sending and receiving communication handshake messages, the test system can ensure that a stable communication connection is established between the virtual BMS module and the device under test (off-board charger or charging interface of an electric vehicle).

[0101] In order to test the communication performance of the charging interface, the test system will simulate actual charging demand scenarios, such as low battery and need to be charged, battery status changes during charging, etc. According to the simulated charging demand scenarios, the virtual BMS module will send corresponding charging demand communication messages to the device under test. These messages contain battery status information, charging requests, etc.

[0102] The CAN test unit is a commonly used in-vehicle network protocol used for communication between various systems within the vehicle. The CAN test unit is a device in the test system used to monitor and analyze communication messages on the CAN bus. Real-time monitoring of communication message content on the CAN bus: During the test, the CAN test unit will monitor the communication message content on the CAN bus in real time, including the charging demand communication message sent by the virtual BMS module and the response message sent by the device under test.

[0103] The data analysis and processing module will analyze the communication messages captured by the CAN test unit, including the message format, content, sending time, etc. By analyzing the communication messages, the data analysis and processing module can evaluate the communication performance of the charging interface, such as communication stability, response speed, message loss rate, etc. These evaluation results are of great significance for judging whether the charging interface meets the design requirements and whether there are communication failures.

[0104] Optionally, the charging boot process monitoring includes: in the charging boot stage, tracking the communication status of the CAN bus through a CAN test unit, collecting ground level and line-to-line level information of the charging communication line, and the evaluation information is used to evaluate the communication performance.

[0105] In the embodiment of the present application, before the electric vehicle starts charging, a series of communication interactions will be carried out between the charger and the electric vehicle to confirm the correctness of the charging connection, the status of the battery, the charging parameters, etc. This process is called charging guidance. The charging guidance process is observed and recorded in real time to ensure the smooth progress of the process and timely detection of possible problems. Using the CAN test unit, the communication activities on the CAN bus can be monitored in real time, including the sending, receiving, content, timestamp, etc. of the message, so as to understand the real-time status of the communication during the charging guidance process.

[0106] Charging communication lines refer to cables used for communication between chargers and electric vehicles. These cables may include CAN bus cables, power cables, etc. The ground level refers to the voltage level of the communication line relative to the ground (or reference point). In CAN communication, the ground level is an important basis for judging the status of the communication line (such as whether it is short-circuited or open-circuited). The line-to-line level refers to the voltage difference between the communication lines (such as the two lines of the CAN bus: CAN_H and CAN_L). The change in the line-to-line level reflects the signal transmission on the CAN bus. The ground level and line-to-line level information of the charging communication line can be collected through the CAN test unit or other measuring equipment.

[0107] By analyzing the collected level information, the communication performance of the CAN bus during the charging boot process can be evaluated. For example, abnormal ground level may indicate a short circuit or open circuit problem in the communication line; unstable level between lines may indicate poor signal transmission quality or interference.

[0108] Optionally, the step 105 includes: when it is detected that the charging interface connection is abnormal or the communication performance is not up to standard, triggering the early warning device through the host computer, lighting up the early warning indicator light and starting the buzzer.

[0109] In an embodiment of the present application, abnormal connection of the charging interface includes that the charging interface is not connected correctly, the connection is loose, the interface is damaged, or there are other physical connection problems, which may cause charging to fail or there are safety hazards. Substandard communication performance means that during the charging process, the charger and the electric vehicle need to exchange information through communication, such as battery status, charging parameters, etc. If the communication performance is not up to standard, it may cause information transmission errors, delays or losses, which in turn affects the accuracy and safety of charging. The system uses built-in sensors, monitoring circuits or software algorithms to detect the connection status and communication performance of the charging interface in real time to ensure that they meet the requirements for normal operation.

[0110] In the electric vehicle charging system, the host computer usually refers to the computer or control system used to control, monitor and record the charging process. It is responsible for receiving data from the charger, electric vehicle and other sensors, and making decisions or issuing instructions based on these data. When the host computer detects that the charging interface connection is abnormal or the communication performance is not up to standard, it will trigger the early warning device by outputting a signal or sending an instruction. The early warning device is a device used to alert operators or users to potential problems. Among them, the early warning indicator is a visual early warning device, which usually indicates different levels of early warning information through different colors or flashing frequencies. When the host computer triggers the early warning device, the early warning indicator will be lit to attract the attention of the operator or user. The buzzer is an auditory early warning device that can send a sound signal to alert people. When the host computer triggers the early warning device, the buzzer will be activated and emit a continuous or intermittent sound signal to further enhance the early warning effect.

[0111] Based on the same inventive concept, the embodiment of the present application also provides a vehicle charging interface warning device for implementing the vehicle charging interface warning method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the warning device for one or more vehicle charging interfaces provided below can refer to the limitations of the vehicle charging interface warning method above, and will not be repeated here.

[0112] In an exemplary embodiment, Figure 2 As shown, a warning device 40 for a vehicle charging interface is provided, comprising:

[0113] The test module 401 is used to test the DC charging interface of the electric vehicle using the test system, and the test content includes test parameter configuration, connection status test, communication performance test and charging guidance process monitoring;

[0114] Processing module 402, used to configure parameters through the host computer, and use the relay group and the acquisition control board to perform specific tests on the connection status;

[0115] Evaluate communication performance through CAN test unit and data analysis and processing module;

[0116] After confirming that all connections are normal, the charging boot process is started through the mode switching circuit, while continuously monitoring and evaluating the communication performance of the CAN bus;

[0117] The early warning module 403 is used to assist the early warning sensor in real-time monitoring of the input power supply voltage, and provide early warning information through an indicator light and a buzzer according to the matching condition between the input power supply voltage and the low-voltage power supply voltage of the electric vehicle.

[0118] Optionally, the testing module 401 is further used to:

[0119] The test system is constructed, and the test system at least includes: an integrated test system socket, a test system plug, a mode switching circuit, a CAN test unit, a relay group, an acquisition control board and a host computer, wherein the acquisition control board is electrically connected to the relay group.

[0120] Optionally, the testing module 401 is further used to:

[0121] The rated voltage and rated current of the non-on-board charger to be tested, as well as the rated voltage, battery capacity and peak power of the electric vehicle power battery pack to be tested are input through the host computer, and the voltage level of the test system is set. At the same time, the mode switching circuit is disconnected to prepare for entering the test phase.

[0122] Optionally, the testing module 401 is further used to:

[0123] By controlling the closure of specific contacts of the relay group, different test paths are selectively activated;

[0124] The acquisition control board is used to capture the potential change of a specific sampling point to obtain the potential value;

[0125] Whether the connection status of each contact between the vehicle plug of the off-board charger and the test system socket, and between the vehicle socket of the electric vehicle and the test system plug is normal is determined according to the potential value.

[0126] Optionally, the testing module 401 is further used to:

[0127] Using the virtual BMS module and the off-board charger communication module, periodically send communication handshake messages according to the preset communication protocol to establish a stable communication connection with the device under test;

[0128] Simulate the actual charging demand scenario, send charging demand communication messages, and monitor the communication message content on the CAN bus in real time through the CAN test unit;

[0129] The communication performance is evaluated by analyzing the captured communication messages through the data analysis and processing module.

[0130] Optionally, the testing module 401 is further used to:

[0131] During the charging boot phase, the communication status of the CAN bus is tracked through the CAN test unit, and the ground level and line-to-line level information of the charging communication line are collected. The evaluation information is used to evaluate the communication performance.

[0132] Optionally, the early warning module 403 is further used to:

[0133] When it is detected that the charging interface connection is abnormal or the communication performance is not up to standard, the warning device is triggered by the host computer, the warning indicator light is lit and the buzzer is started.

[0134] The embodiment of the present application can ensure the stability and reliability of the DC charging interface of the electric vehicle under various working conditions through the test process of parameter configuration, connection status test, communication performance test and charging guidance process monitoring, and timely discover and warn of potential voltage mismatch problems, thereby improving charging safety, optimizing charging performance, and ultimately simplifying the fault handling process, and promoting the standardization and intelligent management of charging interfaces.

[0135] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 3 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store early warning data of the vehicle charging interface. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for early warning of a vehicle charging interface is implemented.

[0136] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0137] In an exemplary embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0138] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0139] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0140] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0141] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0142] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0143] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A vehicle charging interface early warning method, characterized in that: The early warning method of the vehicle charging interface includes: The DC charging interface of electric vehicles is tested using the test system. The test contents include test parameter configuration, connection status test, communication performance test and charging guidance process monitoring. Parameters are configured through the host computer, and the relay group and acquisition control board are used to conduct specific tests on the connection status; Evaluate communication performance through CAN test unit and data analysis and processing module; After confirming that all connections are normal, the charging boot process is started through the mode switching circuit, while continuously monitoring and evaluating the communication performance of the CAN bus; The auxiliary warning sensor monitors the input power supply voltage in real time, and provides warning information through indicator lights and buzzers according to the matching of the input power supply voltage with the low-voltage power supply voltage of the electric vehicle.

2. The vehicle charging interface early warning method according to claim 1, characterized in that: The vehicle charging interface early warning method further includes: The test system is constructed, and the test system at least includes: an integrated test system socket, a test system plug, a mode switching circuit, a CAN test unit, a relay group, an acquisition control board and a host computer, wherein the acquisition control board is electrically connected to the relay group.

3. The vehicle charging interface early warning method according to claim 1, characterized in that: The step of performing parameter configuration by the host computer includes: The rated voltage and rated current of the non-on-board charger to be tested, as well as the rated voltage, battery capacity and peak power of the electric vehicle power battery pack to be tested are input through the host computer, and the voltage level of the test system is set. At the same time, the mode switching circuit is disconnected to prepare for entering the test phase.

4. The vehicle charging interface early warning method according to claim 1, characterized in that: The connection status test includes: By controlling the closure of specific contacts of the relay group, different test paths are selectively activated; The acquisition control board is used to capture the potential change of a specific sampling point to obtain the potential value; Whether the connection status of each contact between the vehicle plug of the off-board charger and the test system socket, and between the vehicle socket of the electric vehicle and the test system plug is normal is determined according to the potential value.

5. The vehicle charging interface warning method according to claim 1, characterized in that: The communication performance test includes: Using the virtual BMS module and the off-board charger communication module, periodically send communication handshake messages according to the preset communication protocol to establish a stable communication connection with the device under test; Simulate the actual charging demand scenario, send charging demand communication messages, and monitor the communication message content on the CAN bus in real time through the CAN test unit; The communication performance is evaluated by analyzing the captured communication messages through the data analysis and processing module.

6. The vehicle charging interface warning method according to claim 1, characterized in that: The charging boot process monitoring includes: During the charging boot phase, the communication status of the CAN bus is tracked through the CAN test unit, and the ground level and line-to-line level information of the charging communication line are collected. The evaluation information is used to evaluate the communication performance.

7. The vehicle charging interface early warning method according to claim 1, characterized in that: The step of providing warning information through the indicator light and the buzzer includes: When it is detected that the charging interface connection is abnormal or the communication performance is not up to standard, the warning device is triggered by the host computer, the warning indicator light is lit and the buzzer is started.

8. A warning device for a vehicle charging interface, characterized in that: The early warning device of the vehicle charging interface comprises: A test module is used to test the DC charging interface of the electric vehicle using the test system. The test content includes test parameter configuration, connection status test, communication performance test and charging boot process monitoring; The processing module is used to configure parameters through the host computer and perform specific tests on the connection status using the relay group and the acquisition control board; Evaluate communication performance through CAN test unit and data analysis and processing module; After confirming that all connections are normal, the charging boot process is started through the mode switching circuit, while continuously monitoring and evaluating the communication performance of the CAN bus; The early warning module is used to assist the early warning sensor in real-time monitoring of the input power supply voltage, and provide early warning information through indicator lights and buzzers according to the matching situation between the input power supply voltage and the low-voltage power supply voltage of the electric vehicle.

9. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the early warning method for the vehicle charging interface described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the early warning method for a vehicle charging interface described in any one of claims 1-7 are implemented.

Images