Vehicle safety detection device and method

Abstract

The invention belongs to the technical field of vehicle diagnosis, and relates to a vehicle safety detection device and method. The device comprises a control module and a detection module, the detection module comprises one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module; the insulation detection module is used for acquiring insulation detection data of a to-be-detected vehicle; the equipotential measurement module is used for acquiring equipotential detection data of the to-be-detected vehicle; the vehicle data detection module is used for acquiring OBD vehicle parameters of the to-be-detected vehicle; the control module is used for determining parameters to be measured; wherein the parameters to be measured are determined according to vehicle information; obtaining parameter content corresponding to the to-be-measured parameter through the detection module; and generating detection information of the to-be-detected vehicle according to the parameter content corresponding to the to-be-measured parameter. Safety detection is carried out on the vehicle in a global automation mode, and is not limited to safety detection in a certain aspect.

Description

Technical Field

[0001] The present application belongs to the field of vehicle diagnosis technology, and specifically relates to a vehicle safety detection device and method. Background Art

[0002] With the global emphasis on new energy technologies and the improvement of environmental awareness, new energy vehicles have gradually become mainstream transportation. However, as the degree of vehicle electrification increases, how to ensure its safety has also become a key issue.

[0003] In the process of implementing this application, the inventor found that there are at least the following problems in the prior art: the existing detection devices are mostly focused on monitoring the battery status, maintaining the charging system and local safety detection of electrical components, and the detection of a single component or a local system usually requires the adaptation of corresponding detection equipment for detection. Although it can improve the safety of the vehicle to a certain extent, it ignores the comprehensive safety detection needs of the entire vehicle system. Summary of the invention

[0004] The embodiments of the present application provide a vehicle safety detection device and method, which can solve the technical problem that existing detection devices are mostly focused on local safety detection, and have the advantage of global automated safety detection.

[0005] In a first aspect, an embodiment of the present application provides a vehicle safety detection device, which includes a control module and a detection module; the detection module includes one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module; the insulation detection module is used to obtain insulation detection data of a vehicle to be detected; the equipotential measurement module is used to obtain equipotential detection data of the vehicle to be detected; the vehicle data detection module is used to obtain OBD vehicle parameters of the vehicle to be detected; the control module is used to: determine parameters to be measured; wherein the parameters to be measured are determined based on vehicle information; obtain parameter content corresponding to the parameters to be measured through the detection module; and generate detection information of the vehicle to be detected based on the parameter content corresponding to the parameters to be measured.

[0006] In some embodiments, the parameter to be measured includes the insulation detection data, and the insulation detection data includes the insulation parameters of the high-voltage battery; the detection module at least includes the insulation detection module; when the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used for: the control module sends an insulation parameter detection instruction to the insulation detection module, so that the insulation detection module obtains the measurement result of the insulation parameter of the high-voltage battery.

[0007] In some embodiments, the control module is composed of a first control unit and a second control unit, and the insulation detection module is connected to the first control unit and the second control unit respectively; the control module is used to issue an insulation parameter detection instruction to the insulation detection module so that the insulation detection module obtains the measurement results of the insulation parameters of the high-voltage battery, specifically: the second control unit issues the insulation parameter detection instruction; the first control unit responds to the insulation parameter detection instruction so that the insulation detection module obtains the measurement results of the insulation parameters of the high-voltage battery.

[0008] In some embodiments, when the insulation detection module is used to obtain the measurement results of the insulation parameters of the high-voltage battery, it is specifically used for: the insulation detection module receives a preset high-voltage signal issued by the first control unit; the insulation detection module obtains the measurement results of the insulation parameters of the high-voltage battery based on the high-voltage signal.

[0009] In some embodiments, the parameter to be measured includes a charging control signal; and the control module is further used to: obtain a measurement result corresponding to the charging control signal through an AC charging interface.

[0010] In some embodiments, the parameter to be measured includes the electrical grounding resistance; the detection module includes at least the equipotential measurement module; when the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used for: the control module sends a resistance detection instruction to the equipotential measurement module, so that the equipotential measurement module responds to the resistance detection instruction to obtain the measurement result of the electrical grounding resistance.

[0011] In some embodiments, the parameters to be measured include OBD vehicle parameters; the detection module includes at least the vehicle data detection module; when the control module is used to obtain the parameter content corresponding to the parameters to be measured through the detection module, it is specifically used for: the control module sends a data detection instruction to the vehicle data detection module, so that the vehicle data detection module responds to the data detection instruction to obtain the measurement result of the OBD vehicle parameter.

[0012] In some embodiments, the parameter to be measured includes the insulation detection data, and the insulation detection data includes the insulation resistance; the detection module at least includes the insulation detection module; when the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used for: the control module obtains the insulation resistance between the preset terminals corresponding to the AC charging port and / or the DC charging port detected by the insulation detection module and the ground.

[0013] In some embodiments, a report printing module is also included, and the report printing module is connected to the control module; the report printing module is used to print the safety detection report.

[0014] In the second aspect, an embodiment of the present application provides a vehicle safety detection method, which is applied to the above-mentioned vehicle safety detection device, and the method includes: obtaining vehicle information of the vehicle to be detected; determining the parameters to be measured based on the vehicle information; according to the parameters to be measured, obtaining the parameter content corresponding to the parameters to be measured through a detection module; wherein the detection module includes one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module; and generating the detection information of the vehicle to be detected based on the parameter content corresponding to the parameters to be measured.

[0015] The embodiment of the present application provides a vehicle safety detection device and method, the vehicle safety detection device includes: a control module and a detection module; the detection module includes one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module; the insulation detection module is used to obtain the insulation detection data of the vehicle to be detected; the equipotential measurement module is used to obtain the equipotential detection data of the vehicle to be detected; the vehicle data detection module is used to obtain the OBD vehicle parameters of the vehicle to be detected; the control module is used to: determine the parameters to be measured; wherein the parameters to be measured are determined according to the vehicle information; the parameter content corresponding to the parameters to be measured is obtained through the detection module; and the detection information of the vehicle to be detected is generated according to the parameter content corresponding to the parameters to be measured. In this embodiment, by integrating multiple modules, a comprehensive safety assessment of the vehicle is performed in an automated and systematic manner, rather than being limited to a certain aspect of safety detection. By determining the detection parameters, implementing multiple measurements and generating detection information, the device can effectively identify vehicle safety hazards, help vehicle owners and maintenance personnel take timely measures, and ensure the safety and reliability of the vehicle during use. This systematic detection process not only improves the detection efficiency, but also provides important data support and decision-making basis for vehicle safety management. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of a vehicle safety detection device provided in an embodiment of the present application;

[0017] Figure 2 is a structural schematic diagram of a vehicle safety detection device provided by another embodiment of the present application;

[0018] Figure 3 It is a flow chart of the vehicle safety detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0021] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0022] See also Figure 1 , Figure 1 Schematic diagram of the structure of the vehicle safety detection device provided in the embodiment of the present application. Figure 1 As shown, the vehicle safety detection device 100 includes: a control module 10 and a detection module 20. The detection module 20 includes one or more of an insulation detection module 30, an equipotential measurement module 40, and a vehicle data detection module 50. Taking the detection module 20 including three modules as an example, the control module 10 is connected to the insulation detection module 30, the equipotential measurement module 40, and the vehicle data detection module 50 respectively.

[0023] The control module 10 is the core of the vehicle safety detection device, integrating functions such as data processing, logic control, storage unit and communication interface. The control module 10 is connected with other detection modules through a communication bus (such as CAN bus, LIN bus or Ethernet) to receive the data they transmit. In the present embodiment, the control module 10 connects the insulation detection module 30, the equipotential measurement module 40 and the vehicle data detection module 50 to coordinate the detection tasks of each module. The control module 10 is mainly used to manage the entire detection process, determine the parameters that need to be detected according to the vehicle information, control and schedule the work of other modules, collect the detection results returned by each module, and generate the safety detection information of the vehicle according to these results. In addition, the control module 10 also selects a suitable detection path according to the parameters to be measured to ensure the accuracy of the detection.

[0024] The insulation detection module 30 is usually composed of an insulation resistance meter or a high-voltage insulation test device, which can measure the electrical insulation performance of electric or hybrid vehicles. The insulation detection module 30 can be connected to the high-voltage electrical system of the vehicle (such as battery, inverter, drive motor) through a test probe or connector to perform insulation testing and transmit the measurement results to the control module 10. In this embodiment, the insulation detection module 30 is mainly used to detect the insulation performance of the electrical system, especially the high-voltage system of the electric vehicle, to ensure that there is sufficient insulation between the high-voltage circuit in the system and the vehicle body to avoid the risk of leakage. For example, the insulation resistance in the circuit is measured to ensure that the electrical isolation meets the safety standards.

[0025] The equipotential measurement module 40 is usually composed of an equipotential tester or a potential difference measuring device to detect the potential difference between different metal parts of the vehicle. The equipotential measurement module 40 is connected to multiple metal parts of the vehicle (such as the frame, engine body, door, etc.) through connecting wires or probes, measures the potential difference between each part, and transmits the detection data to the control module through a communication bus. In this embodiment, the equipotential measurement module 40 is mainly used to measure the potential difference between different metal parts of the vehicle to ensure that they are at the same potential to avoid the risk of electric shock or spark discharge due to the potential difference.

[0026] The vehicle data detection module 50 is composed of a data acquisition device, which can obtain the operating data of the vehicle through the communication bus (such as CAN bus) of the vehicle. This module usually integrates multiple sensors or extracts relevant data from the electronic control unit (ECU) of the vehicle. In this embodiment, the vehicle data detection module 50 is connected to the control module 10 of the vehicle, and obtains real-time operating data such as battery voltage, vehicle speed, engine speed, etc. through the vehicle bus (such as CAN bus), and transmits these data to the control module 10 for further analysis. The vehicle data detection module 50 is mainly used to monitor the operating status of the vehicle in real time, and collect key data of the vehicle such as electrical system voltage, temperature, rotation speed, vehicle speed, braking status, etc. These key data provide data analysis basis for the control module 10, help evaluate the overall health status of the vehicle, and reflect the operating safety of the vehicle in the detection information.

[0027] In this embodiment, the basic working principle of the vehicle safety detection device 100 is: at the beginning of the detection, the device can obtain the basic information of the vehicle to be detected through a camera or an OBD interface, which includes the model, production year, VIN (vehicle identification number), and related technical parameters of the vehicle. By reading this information, the device can quickly identify the vehicle to be tested and provide necessary basic data for subsequent detection. After receiving the vehicle information, the control module 10 will determine the parameters to be measured according to the preset rules and standards. These parameters include the insulation state of the vehicle, the equipotential connection and other key safety indicators. This process is crucial because it ensures the pertinence and effectiveness of the detection. Once the parameters to be measured are determined, the control module 10 will instruct the corresponding detection module to start working. Among them, the insulation detection module 30 determines whether there is a risk of leakage or short circuit by measuring the insulation performance of the vehicle's electrical system. It determines the effectiveness and safety of the insulating material by applying a specific voltage and monitoring the change of the current. The equipotential measurement module 40 is responsible for detecting the equipotential connection between the various metal parts of the vehicle to ensure that all metal parts are at the same potential to prevent electric shock or electrical failure caused by potential difference. During measurement, the module will evaluate the voltage difference between the vehicle body, chassis and electrical system, and output the result. The vehicle data detection module 50 comprehensively reads the sensor data of the vehicle, evaluates the overall status of the vehicle, and collects key data of the vehicle such as electrical system voltage, temperature, rotation speed, vehicle speed, braking status, etc., and also data related to the braking system, steering system, and lighting system. By comparing the vehicle data with the standard parameters, the system can identify potential faults or safety hazards. After all detection modules complete the measurement, the results are fed back to the control module 10. The control module 10 integrates the parameter content obtained by each module and performs data analysis and processing. Among them, the parameter content is specifically the detection results corresponding to the above-mentioned modules. Based on the basic information and detection information of the vehicle, a detailed safety inspection report is generated. This report will include the specific value of each parameter to be measured, whether it meets the safety standards, and the recommended maintenance measures.

[0028] The vehicle safety detection device provided in the embodiment of the present application integrates multiple modules to conduct a comprehensive safety assessment of the vehicle in an automated and systematic manner, rather than being limited to safety detection in a certain aspect. By obtaining vehicle information, determining detection parameters, implementing multiple measurements, and generating detection reports, the device can effectively identify vehicle safety hazards, help vehicle owners and maintenance personnel take timely measures, and ensure the safety and reliability of the vehicle during use. This systematic detection process not only improves detection efficiency, but also provides important data support and decision-making basis for vehicle safety management.

[0029] The vehicle safety detection device 100 is described in detail below with reference to the accompanying drawings.

[0030] See also Figure 2 , Figure 2 FIG. 1 is a schematic diagram of the structure of a vehicle safety detection device provided by another embodiment of the present application. Figure 2 As shown, taking the detection module 20 including three modules as an example, the vehicle safety detection device 100 includes: a control module 10, a detection module 20, a vehicle identification module 60 and a report printing module 70, the detection module 20 includes an insulation detection module 30, an equipotential measurement module 40 and a vehicle data detection module 50, the control module 10 is composed of a first control unit 101 and a second control unit 102, the first control unit 101 is connected to the insulation detection module 30, and the second control unit 102 is respectively connected to the vehicle identification module 60, the insulation detection module 30, the equipotential measurement module 40, the vehicle data detection module 50 and the report printing module 70.

[0031] The first control unit 101 is mainly used to respond to instructions from the second control unit 102 and perform related operations according to the instructions. In this embodiment, the first control unit 101 can be a vehicle communication control unit, which is responsible for handling the communication and coordination between various detection modules of the vehicle. Taking the communication interaction between the first control unit 101 and the insulation detection module 30 as an example, the functions of the first control unit 101 include: Signal processing: This unit receives instructions from the second control unit 102, and converts and forwards signals as needed to ensure that the insulation detection module 30 can receive the correct high-voltage signal. Data transmission: Responsible for data interaction with the insulation detection module 30 to ensure that the required insulation parameters can be accurately measured and fed back. Monitoring and feedback: The first control unit 101 continuously monitors the progress of insulation detection and feeds back the measurement results to the second control unit 102 in real time. This process ensures the real-time and accuracy of the data. Fault diagnosis: During the detection process, the first control unit 101 can identify potential communication failures or signal interference, and ensure the smooth progress of the detection process through the exception handling mechanism.

[0032] The second control unit 102 is mainly used to integrate information from various modules and issue corresponding detection instructions, playing a role of command and coordination. In this embodiment, the second control unit 102 can be an ECU control unit, which is responsible for global control and coordination of the operations of various modules in the system. Its main functions include: Central processing: As the core of the vehicle safety detection device, the second control unit 102 is responsible for integrating and processing data from the vehicle identification module 60, the insulation detection module 30, the equipotential measurement module 40 and the vehicle data detection module 50. Instruction issuance: It sends detection instructions to the first control unit 101 based on the identified vehicle information and measurement needs to ensure the order and logic of the detection program. Data analysis: This unit will analyze the data fed back by each module, determine whether it meets the safety standards, and generate a final detection report. System coordination: The second control unit 102 ensures the coordinated operation between various modules, handles data interaction between different modules, and ensures the efficient operation of the entire detection system. User interface: Generally, the ECU control module may also provide an interface with the user or operator to display the detection progress, results and related safety warnings.

[0033] The vehicle identification module 60 is mainly composed of a vehicle identification system (such as a camera, an OBD-II interface, an RFID identifier or a VIN reading device) and is used to obtain basic information about the vehicle. The vehicle identification module 60 can be connected to the vehicle system through a physical interface (such as an OBD-II interface) or a wireless connection (such as RFID, NFC), and directly communicate with the control module 10 to transmit the vehicle's identity information (such as vehicle model, VIN code, etc.) to the control module 10. In this embodiment, the vehicle identification module 60 mainly obtains the vehicle information of the vehicle to be detected through a camera module or an OBD interface. The vehicle information includes key information such as the vehicle's VIN code, model, and manufacturing date, and provides the vehicle information to the control module 10 for analysis, so that the control module 10 selects appropriate detection parameters to ensure that the detection is performed according to the specific conditions of the vehicle model and system.

[0034] In some embodiments, the parameters to be measured include insulation detection data, and the insulation detection data include insulation parameters of the high-voltage battery; the detection module 20 includes at least an insulation detection module 30; when the control module 10 is used to obtain parameter content corresponding to the parameters to be measured through the detection module 20, it is specifically used for: the control module 10 sends an insulation parameter detection instruction to the insulation detection module 30, so that the insulation detection module 30 obtains the measurement results of the insulation parameters of the high-voltage battery.

[0035] The second control unit 102 sends an insulation parameter detection instruction to the first control unit 101; the first control unit 101 responds to the insulation parameter detection instruction so that the insulation detection module 30 obtains the measurement result of the insulation parameter of the high-voltage battery. The insulation detection module 30 receives the preset high-voltage signal sent by the first control unit 101, and obtains the measurement result of the insulation parameter of the high-voltage battery according to the high-voltage signal.

[0036] Specifically, the detection process is first initiated by the vehicle identification module 60. This module reads the basic information of the vehicle to be detected, such as the vehicle model, VIN, etc., and transmits the information to the second control unit 102. The second control unit 102 determines the parameters to be measured based on the basic information of the vehicle, including the insulation parameters of the high-voltage battery. This process ensures the pertinence of subsequent detection. The second control unit 102 sends an insulation parameter detection instruction to the first control unit 101, requiring it to obtain a high-voltage signal, which is the basis for subsequent measurements by the insulation detection module 30. The first control unit 101 responds to the instruction, obtains a preset high-voltage signal, and sends it to the insulation detection module 30. After receiving the high-voltage signal, the insulation detection module 30 measures the insulation parameters of the high-voltage battery, and the module feeds back the measurement results to the second control unit 102.

[0037] It is understood that when the detection starts, the second control unit 102 first sends an insulation parameter detection instruction to the first control unit 101. The instruction contains the information required for the insulation parameter detection. After receiving the detection instruction, the first control unit 101 immediately responds and activates the preset high-voltage signal through its control logic. This process usually involves: Activating the DC charging contactor: The first control unit 101 activates the high-voltage relay through the control circuit, which is actually an electrical switch that controls the on and off of the high-voltage system of the electric vehicle. During this process, the charging contactor is closed to form a complete circuit. Generate a high-voltage signal: The high-voltage signal is generated by the power module. The signal is set with a specific voltage and meets safety standards to ensure the accuracy and safety of subsequent measurements. Once the high-voltage signal is generated and confirmed, the first control unit 101 transmits the signal to the insulation detection module 30. At this time, the insulation detection module 30 is ready to start measuring the insulation parameters of the high-voltage battery. After receiving the high-voltage signal, the insulation detection module 30 will perform the test according to the SAE J1766 standard, which is used to evaluate whether the battery system of electric and hybrid electric vehicles maintains complete insulation performance after a collision. The process includes: Simulating the high-voltage battery state: The insulation detection module 30 simulates the high-voltage signal as the operating environment of the battery under an accident state to ensure the authenticity and reliability of the test. Measuring insulation parameters: The module measures the insulation state of the high-voltage battery in real time through sensors and electrical components, usually including key indicators such as leakage current and insulation resistance. These measurement results will reflect the insulation safety of the high-voltage battery under high-voltage working conditions. After the measurement is completed, the insulation detection module 30 returns the measured insulation parameter results to the first control unit 101, and further transmits it to the second control unit 102. At this time, the second control unit 102 can determine whether the insulation state of the high-voltage battery meets the safety standards based on the measurement results. Finally, the test results will be integrated into the safety test report to provide a basis for subsequent maintenance or safety decisions.

[0038] In this embodiment, through this series of steps, the vehicle safety detection device 100 can efficiently and accurately evaluate the insulation performance of the high-voltage battery to ensure the safety and reliability of the electric vehicle during use. This process not only meets the safety standards, but also provides strong support for battery safety assessment after an accident.

[0039] In some embodiments, the parameter to be measured includes a charging control signal; the control module 10 is further used to obtain a measurement result corresponding to the charging control signal through the AC charging interface.

[0040] In the vehicle safety detection device 100, the first control unit 101 is connected to the AC charging interface of the vehicle to be detected to obtain the charging control signal and perform measurement. The specific process is as follows:

[0041] Before starting the detection, the first control unit 101 establishes a physical connection with the AC charging interface of the vehicle to be detected through a suitable interface. This connection ensures the bidirectional flow of data and power. After the connection is established, the first control unit 101 receives the charging control signal from the charging pile or charging device through the AC charging interface. These signals mainly include: Constant current signal (CC): This signal is used to control the current during the charging process to ensure that the current is within a safe range. Constant power signal (CP): This signal is used to control the charging power to ensure that a constant power output is maintained during the charging process. After receiving the charging control signal, the first control unit 101 will perform the following processing: Signal decoding: The control unit decodes the received CC and CP signals to extract key information such as charging status, power, and current value. Parameter composition: The decoded signal parameters are integrated into the parameters to be measured to prepare for subsequent data analysis and safety assessment. During the charging process, the first control unit 101 also monitors the charging status in real time, specifically including: Real-time data acquisition: Regularly obtain new charging control signals from the charging interface to update the charging status information. Abnormal detection: Monitor abnormal conditions during the charging process, such as excessive current or charging interruption, and issue an alarm in time. Finally, the measurement result of the charging control signal will be fed back to the second control unit 102, which will then analyze the charging control signal to determine whether the charging meets the safety standards, and integrate the measurement result and charging status information into a safety detection report and provide it to the operator or vehicle owner.

[0042] In this embodiment, the control module not only realizes the connection with the AC charging interface, but also successfully obtains and analyzes the charging control signal. This process ensures the safety of the charging operation and provides necessary data support for subsequent safety detection. Through continuous monitoring and feedback, the device can effectively prevent potential charging safety risks and ensure the safe operation of electric vehicles during the charging process.

[0043] In some embodiments, the parameter to be measured includes electrical grounding resistance; the detection module 20 includes at least an equipotential measurement module 40; when the control module 10 is used to obtain the parameter content corresponding to the parameter to be measured through the detection module 20, it is specifically used for: the control module 10 sends a resistance detection instruction to the equipotential measurement module 40, so that the equipotential measurement module 40 responds to the resistance detection instruction and obtains the measurement result of the electrical grounding resistance.

[0044] During the detection process, the second control unit 102 sends a resistance detection instruction to the equipotential measurement module 40 according to the detection requirements of the vehicle. This instruction is to start the measurement process of the electrical grounding resistance. After receiving the resistance detection instruction, the equipotential measurement module 40 immediately performs the corresponding operation. This usually includes: activating the measurement circuit and preparing to measure the electrical grounding resistance. Setting measurement parameters, such as measuring current and voltage, etc. The equipotential measurement module 40 obtains the actual measurement results of the electrical grounding resistance through the set measurement circuit and method. The process usually involves: applying a certain voltage or current to the grounding system, measuring the current and voltage values, and calculating the electrical grounding resistance through Ohm's law. After the measurement is completed, the equipotential measurement module 40 feeds back the measurement results of the electrical grounding resistance to the second control unit 102, which provides necessary data for subsequent safety assessment and report generation.

[0045] In addition, the equipotential measurement module 40 is also used to measure the potential difference between different parts of the vehicle to ensure the equipotential connection of various components inside the vehicle, thereby preventing the risk of electric shock. It is understandable that the equipotential detection module 40 will apply a certain current in the measurement circuit to facilitate the measurement of the potential difference between various parts. This current should be within a safe range to avoid damage to equipment or personnel. The equipotential detection module 40 will simultaneously measure the potential difference between various connected parts, including: using a built-in sensor to collect the potential data of each connection point, and using Ohm's law to calculate the equipotential resistance value based on the applied current and the measured potential difference. By comparing the potential difference between different parts, it is evaluated whether the equipotential connection of each component is good. If the measured potential difference is within a safe range, it means that the equipotential connection is effective; if the potential difference is too large, it indicates that there may be a poor grounding or uneven potential. After the measurement is completed, the equipotential detection module 40 feeds back the measurement results to the second control module 102, and its measurement results include the measured potential difference, the equipotential resistance value and its evaluation status. The second control module 102 can generate a detailed test report based on the measurement results. The report content includes the potential difference of each part, the equipotential resistance value and whether it meets the safety standards.

[0046] In this embodiment, the detection of electrical grounding resistance and equipotential connection by the equipotential measurement module 40 effectively reduces the risk of electric shock and ensures the safety of the vehicle during use. In addition, the automated detection process not only improves the detection efficiency and reduces the possibility of human error, but also can obtain the status of the vehicle grounding system in real time, which is convenient for timely discovery and handling of potential problems. The detection results help ensure that the vehicle meets electrical safety standards and enhance the user's sense of trust.

[0047] In some embodiments, the parameters to be measured include OBD vehicle parameters; the detection module 20 includes at least a vehicle data detection module 50; when the control module 10 is used to obtain the parameter content corresponding to the parameters to be measured through the detection module 20, it is specifically used for: the control module 10 sends a data detection instruction to the vehicle data detection module 50, so that the vehicle data detection module 50 responds to the data detection instruction and obtains the measurement result of the OBD vehicle parameter.

[0048] During the OBD vehicle parameter measurement process performed by the vehicle data detection module 50, the vehicle fault code and real-time data are usually read through the OBD diagnostic interface to ensure the normal operation and safety of the vehicle. The following is a specific implementation process of obtaining vehicle parameters through the OBD interface:

[0049] Before the detection begins, the second control unit 102 generates a data detection instruction according to the OBD vehicle parameters that need to be obtained. These parameters may include power battery status, engine speed, throttle position, fault code, etc. The second control unit 102 sends the generated data detection instruction to the OBD interface through the vehicle data detection module 50 (which may be an OBD communication module in this embodiment). The instruction may contain a specific OBD PID (Parameter ID) to specify the type of data to be obtained. After receiving the data detection instruction, the vehicle data detection module 50 is ready to read the data. At the same time, the module establishes communication with the second control unit 102 through the OBD protocol (such as ISO 9141, ISO 14230, ISO 15765, etc.) to ensure that data can be received and sent normally. Finally, the vehicle data detection module 50 feeds back the parsed OBD vehicle parameter measurement results to the second control unit 102, including the acquired parameters and their values. The second control unit 102 integrates these parameters to generate an OBD vehicle parameter detection report, which may include information such as power battery status, fault code, real-time data, etc., which can be used for fault diagnosis, performance evaluation and subsequent maintenance records.

[0050] In addition, the second control unit 102 may be connected to the A+ and A- terminals of the DC charging port so that the second control unit 102 can control and monitor the charging of the high-voltage battery of the electric vehicle. Specifically:

[0051] Through the A+ and A- terminals, the second control unit 102 can send charging instructions to control the current and voltage during the charging process to ensure safe and efficient charging. After connection, the second control unit 102 can monitor the charging status of the battery in real time, including parameters such as battery voltage, current and temperature, which helps to detect potential problems in time and take measures. During the charging process, the second control unit 102 can determine whether it is necessary to pause or stop charging based on real-time data to prevent overcharging or overheating and protect battery safety.

[0052] In this embodiment, the OBD vehicle parameter measurement process can not only realize real-time fault diagnosis, but also monitor the status of the power battery and other key systems in real time, ensuring that the vehicle operates within the optimal performance range and extending the service life of the vehicle. In addition, through the automated data acquisition and analysis process, manual intervention is reduced, the efficiency of vehicle inspection and maintenance is significantly improved, and the maintenance cost is reduced, thereby improving the safety and reliability of the vehicle.

[0053] In some embodiments, the parameters to be measured include insulation detection data, and the insulation detection data include insulation resistance; the detection module 20 includes at least an insulation detection module 30; when the control module 10 is used to obtain the parameter content corresponding to the parameter to be measured through the detection module 20, it is specifically used for: the control module 10 obtains the insulation resistance between the preset terminals corresponding to the AC charging port and / or the DC charging port detected by the insulation detection module 30 and the ground.

[0054] It is understandable that the insulation detection module 30 is also used to ensure the insulation performance of the AC charging port and the DC charging port of the vehicle to be detected. The following are the detailed steps of the detection process:

[0055] The insulation detection module 30 is physically connected to the AC charging port and the DC charging port of the vehicle to be detected to ensure that the wiring terminals of the insulation detection module 30 can correctly contact the L1, L2, L3, and GND terminals of the AC charging port, and the DC+, DC-, and GND terminals of the DC charging port. Subsequently, the insulation detection module is started to check its working status, ensure that all functions are normal, and prepare to measure the insulation resistance. The insulation detection module 30 receives the insulation resistance measurement instruction generated by the second control unit 102 according to the detection requirements. These instructions instruct the insulation detection module 30 to detect the insulation resistance between each preset terminal of the AC charging port and the DC charging port and the ground. It can be understood that the insulation detection module 30 applies a certain test voltage to the preset terminals of the AC and DC charging ports (such as L1, L2, L3, GND, DC+, DC-, GND, etc.), which is usually within a safe range to avoid damage to equipment and personnel. The insulation detection module 30 calculates the insulation resistance using Ohm's law by measuring the current flowing between the preset terminals and the ground. After the test is completed, the insulation detection module transmits the measured insulation resistance to the second control unit 102, so that the second control unit 102 analyzes the measured insulation resistance according to the preset safety standard. If the resistance is lower than the safety standard, it means that there is an insulation fault and immediate inspection or maintenance is required. Finally, the second control unit 102 integrates the measurement results to generate a detailed insulation test report, which includes information such as the insulation resistance of each terminal, the test time, and the status evaluation.

[0056] In this embodiment, the insulation performance of the AC and DC charging ports is ensured by detecting the insulation resistance, so that potential insulation faults can be discovered in time, the risk of electric shock can be reduced, and the stability and reliability of the vehicle electrical system can be protected.

[0057] In some embodiments, the vehicle safety detection device 100 further includes a report printing module 70 , which is connected to the control module 10 ; the report printing module 70 is used to print detection information of the vehicle to be detected.

[0058] It is understandable that the vehicle safety detection device 100 also includes a report printing module 70, which is directly connected to the control module 10 and receives the safety detection report data generated by the control module 10 to ensure the timeliness and accuracy of information transmission. The safety detection report received by the report printing module 70 contains various detection parameters and results of the vehicle, and the report printing module 70 is responsible for formatting these data to ensure that the output results are clear and readable. Subsequently, the report printing module 70 outputs the processed safety detection report into a paper document through a printer, which is convenient for users to view and archive. This is particularly important for occasions where written reports need to be provided, such as testing centers, repair shops or vehicle users. In addition, the printed safety detection report can be used as a formal record of vehicle detection, which is convenient for subsequent review and tracking of the safety status of the vehicle and enhances the systematic nature of maintenance.

[0059] In some embodiments, the second control unit 102 of the vehicle safety detection device 100 further includes an external communication module (not shown), which transmits the detection data to the cloud platform for storage, analysis and display.

[0060] Specifically, each detection module (such as insulation detection module 30, equipotential measurement module 40, vehicle data detection module 50) in the vehicle safety detection device 100 collects various safety parameters of the vehicle in real time, such as insulation resistance of the high-voltage battery, electrical grounding resistance and OBD parameters, etc. The second control unit 102 integrates the data from different detection modules to form a unified data format for subsequent transmission and processing. At this stage, the data will also be basically verified to ensure its integrity and accuracy.

[0061] The external communication module selects the appropriate wireless data transmission technology, such as Wi-Fi, Bluetooth or cellular network, according to the network environment and requirements to ensure the stability and real-time nature of the connection. The integrated data is compressed and encrypted to reduce transmission time and enhance data security. The data packet usually contains the detection timestamp, vehicle identifier and various test results. Once the data is prepared, the module uploads the data to the cloud platform in real time via the wireless network. During the upload process, the system will perform a retransmission mechanism to prevent data loss. After receiving the data, the cloud platform will send a confirmation signal back to the detection device to ensure that the data is successfully uploaded. At this time, the detection device will record the upload status and perform corresponding log management.

[0062] The cloud platform stores the received detection data in a database, using distributed storage technology to ensure high availability and fast retrieval of the data. The data will be stored in categories for easy subsequent analysis and call. Before analysis, the cloud platform preprocesses the data, including denoising, standardization, and feature extraction, to ensure the accuracy of subsequent analysis. Using artificial intelligence technology, the cloud platform conducts in-depth analysis of the preprocessed data. The AI ​​model is trained based on historical data to continuously optimize its predictive capabilities. The analysis includes but is not limited to: vehicle performance trend analysis, potential fault identification, and maintenance recommendation generation. The AI ​​model can identify potential anomalies in vehicle data and predict possible future failure risks. For example, if the insulation resistance of the battery gradually decreases, the system will prompt the user that the component may fail. Fault prediction is not limited to the current status, but also includes trend analysis based on historical data to help car owners perform maintenance in a timely manner.

[0063] After AI analysis, the cloud platform will generate a report containing analysis results, fault predictions, and maintenance recommendations. These results will be presented in an easy-to-understand manner for users to understand. Users can access the inspection report at any time through the web or mobile application to view the real-time status of the vehicle and the maintenance recommendations generated by AI. This feature enables users to obtain timely feedback to better manage their vehicles. In addition, the cloud platform will continuously monitor the vehicle status and dynamically update it based on newly uploaded data. The system will issue alerts in a timely manner to ensure that users can respond quickly to potential problems.

[0064] In this embodiment, efficient data management, intelligent maintenance decisions and preventive maintenance can be achieved through the communication interaction between the external communication module and the cloud platform, which not only improves the intelligence level of detection, but also provides users with efficient and safe vehicle maintenance solutions.

[0065] In some embodiments, the vehicle safety detection device 100 further includes: a display screen (not shown). It is understandable that the vehicle safety detection device can be integrated with a multimedia display screen to display the detection process and results in real time. The display screen can provide a rich graphical interface so that the user can understand the detection status more intuitively. In addition, a voice prompt function can be added to guide the user on how to operate the device or explain the detection results, further improving the user experience, which is particularly helpful for users with fewer technical personnel or non-professional users.

[0066] In some embodiments, each detection function module of the vehicle safety detection device 100 (such as the insulation detection module 30, the equipotential measurement module 40, the vehicle data detection module 50, etc.) can be designed as an independent module. These modules can be selected and combined according to the specific detection requirements of the vehicle to form a customized detection solution. In addition, the detection module can be added or removed at any time according to user needs or different vehicle models.

[0067] It is understandable that the benefits of using modular design in vehicle safety detection devices include: Functional independence: Each detection function module can work independently, which is easy to maintain and upgrade. Each module focuses on a specific detection task, which improves the overall efficiency of the system. Customized solutions: Users can select and combine different modules according to the specific detection needs of the vehicle to form a customized detection solution. For example, for an electric vehicle, an insulation detection module can be selected, while for a hybrid vehicle, an equipotential measurement module may be required. This flexibility makes the system more adaptable to market needs. Reduce costs: Modular design can reduce unnecessary hardware costs. Users only need to purchase the required modules, avoiding the high investment of the entire system. In addition, scalability refers to the ability of the system to expand or shrink according to demand. In vehicle safety detection devices, the advantages of this design include: With the release of new models or technological advances, users can easily add or remove detection modules. This flexibility ensures that the system can always meet the latest detection standards and user needs. When the detection requirements change, users can add new modules according to the new requirements and upgrade the system without replacing the entire device. For example, if there are new safety standards or technologies, users only need to add the corresponding modules. As technology develops, new detection technologies and modules may be developed. The modular design enables existing systems to quickly adapt to these new technologies without requiring a complete system refactoring.

[0068] In this embodiment, the vehicle safety detection device is more flexible and efficient through the combination of modular design and scalability design, and can meet the needs of different users and markets. This design not only improves the availability of the system, but also extends the service life of the equipment and reduces the cost of long-term maintenance and upgrades. Users can flexibly adjust the system configuration according to actual conditions to achieve the best detection effect and safety assurance.

[0069] In some embodiments, the vehicle safety detection device 100 can also be designed as a portable device. It can be understood that designing the vehicle safety detection device as a portable device has many advantages, and is particularly suitable for use by maintenance technicians in various work scenarios: Portability: The portable design makes the device lighter and more compact, making it easier for maintenance technicians to carry. By using lightweight materials and a compact layout, technicians can easily put the device into a toolbox or backpack to reduce the burden of carrying. Strong adaptability: Portable devices can be used in a variety of environments, including outdoors, garages, service stations, etc., to meet the detection needs of different occasions. This design enables the equipment to perform safety inspections anytime and anywhere, improving work flexibility. Durability: In order to adapt to the on-site working environment, portable devices usually use a sturdy and durable casing that is waterproof and dustproof, and can resist the impact of the external environment on the equipment, ensuring reliable operation under various conditions.

[0070] Another major advantage of the portable design is rapid deployment, which is reflected in the following aspects: Quick connection: The device is designed to be plug-and-play, and maintenance technicians can connect the detection device to the vehicle's interface in a few minutes, eliminating the complicated setup process and improving work efficiency. Instant detection: Once the connection is completed, the device can quickly start and perform various necessary tests, such as insulation, ground resistance, and OBD parameters. This rapid detection capability allows technicians to obtain the safety status of the vehicle in a timely manner and reduce vehicle downtime. Efficient feedback: After the test is completed, the device can generate a test report immediately to help technicians quickly identify potential problems and take corresponding measures. This is especially important in emergency situations, such as rapid assessment at the scene of an accident.

[0071] In this embodiment, the vehicle safety detection device not only improves the work efficiency of maintenance technicians, but also enhances the ability of on-site service through the combination of portable design and rapid deployment. Such a design greatly facilitates maintenance work and ensures that the vehicle receives the required safety inspection in the shortest time, thereby improving the overall service quality and customer satisfaction. This flexibility and efficiency are important components of modern vehicle safety detection solutions and meet the needs of the rapidly developing automotive service industry.

[0072] The embodiment of the present application integrates multiple functional modules such as vehicle identification module, insulation detection module, equipotential measurement module, vehicle data detection module, report printing module and control module through the vehicle safety detection device, which can comprehensively evaluate multiple safety indicators of the vehicle. This comprehensive detection ensures the safety of the vehicle under different working conditions. The vehicle safety detection device plays a key role in the following aspects: First, the device can perform fully automatic insulation detection on the AC charging port and DC charging port of new energy vehicles to ensure the safety of the vehicle charging system. This automated detection not only improves the detection efficiency, but also reduces the errors in manual operation. Second, the device activates the high-voltage relay of the vehicle through the DC charging port to simulate the charging pile and perform SAE J1766 safety measurement. In this way, the safety of the high-voltage system of the vehicle can be independently detected without relying on an external charging pile. Third, the device can read and record the relevant data of the vehicle power battery in real time through the vehicle data detection module. All test results can generate reports immediately, and support printing or uploading to the cloud server to realize data storage and remote access. Fourth aspect: The device can identify vehicle information through a vehicle identification module, thereby selecting corresponding detection parameters according to different vehicle types to improve the accuracy and flexibility of detection.

[0073] The present application also provides a vehicle safety detection method, which is applied to the vehicle safety detection device 100 described above. Figure 3 , Figure 3 Flowchart of the vehicle safety detection method provided by the embodiment of the present application. Figure 3 As shown, the method includes:

[0074] S101: Acquire vehicle information of a vehicle to be detected;

[0075] S102: Determine the parameters to be measured according to the vehicle information;

[0076] S103: obtaining parameter content corresponding to the parameter to be measured through a detection module according to the parameter to be measured; wherein the detection module includes one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module;

[0077] S104: Generate detection information of the vehicle to be detected according to parameter content corresponding to the parameter to be measured.

[0078] The above steps S101 to S104 are executed by the vehicle safety detection device 100 in the above embodiment. The specific implementation thereof can refer to the embodiment of the above vehicle safety detection device, which will not be described in detail here.

[0079] The vehicle safety detection method provided in the embodiment of the present application performs a comprehensive safety assessment of the vehicle in an automated and systematic manner, rather than being limited to safety detection in a certain aspect. By obtaining vehicle information, determining detection parameters, implementing multiple measurements, and generating detection reports, the method can effectively identify vehicle safety hazards, help vehicle owners and maintenance personnel take timely measures, and ensure the safety and reliability of the vehicle during use. This systematic detection process not only improves detection efficiency, but also provides important data support and decision-making basis for vehicle safety management.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle safety detection device, characterized in that: The vehicle safety detection device comprises: A control module and a detection module; the detection module includes one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module; The insulation detection module is used to obtain insulation detection data of the vehicle to be detected; The equipotential measurement module is used to obtain equipotential detection data of the vehicle to be detected; The vehicle data detection module is used to obtain the OBD vehicle parameters of the vehicle to be detected; The control module is used for: Determining a parameter to be measured; wherein the parameter to be measured is determined according to vehicle information; Obtaining parameter content corresponding to the parameter to be measured through the detection module; The detection information of the vehicle to be detected is generated according to the parameter content corresponding to the parameter to be measured.

2. The vehicle safety detection device according to claim 1, characterized in that: The parameters to be measured include the insulation detection data, and the insulation detection data include insulation parameters of the high-voltage battery; The detection module at least includes the insulation detection module; When the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used to: The control module sends an insulation parameter detection instruction to the insulation detection module, so that the insulation detection module obtains the measurement result of the insulation parameter of the high-voltage battery.

3. The vehicle safety detection device according to claim 2, characterized in that: The control module is composed of a first control unit and a second control unit, and the insulation detection module is connected to the first control unit and the second control unit respectively; The control module is used to send an insulation parameter detection instruction to the insulation detection module so that the insulation detection module obtains the measurement result of the insulation parameter of the high-voltage battery, specifically for: The second control unit issues the insulation parameter detection instruction; The first control unit responds to the insulation parameter detection instruction to enable the insulation detection module to obtain a measurement result of the insulation parameter of the high-voltage battery.

4. The vehicle safety detection device according to claim 3, characterized in that: When the insulation detection module is used to obtain the measurement result of the insulation parameter of the high-voltage battery, it is specifically used to: The insulation detection module receives a preset high voltage signal sent by the first control unit; The insulation detection module obtains a measurement result of an insulation parameter of the high-voltage battery according to the high-voltage signal.

5. The vehicle safety detection device according to claim 1, characterized in that: The parameter to be measured includes a charging control signal; The control module is also used for: The measurement result corresponding to the charging control signal is obtained through the AC charging interface.

6. The vehicle safety detection device according to claim 1, characterized in that: The parameter to be measured includes electrical ground resistance; The detection module at least includes the equipotential measurement module; When the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used to: The control module sends a resistance detection instruction to the equipotential measurement module, so that the equipotential measurement module responds to the resistance detection instruction and obtains the measurement result of the electrical grounding resistance.

7. The vehicle safety detection device according to claim 1, characterized in that: The parameters to be measured include OBD vehicle parameters; The detection module at least includes the vehicle data detection module; When the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used to: The control module sends a data detection instruction to the vehicle data detection module, so that the vehicle data detection module responds to the data detection instruction and obtains the measurement result of the OBD vehicle parameter.

8. The vehicle safety detection device according to claim 1, characterized in that: The parameter to be measured includes the insulation detection data, and the insulation detection data includes insulation resistance; the detection module at least includes the insulation detection module; When the control module is used to obtain the parameter content corresponding to the parameter to be measured through the detection module, it is specifically used to: The control module obtains the insulation resistance between the preset terminals corresponding to the AC charging port and / or the DC charging port respectively detected by the insulation detection module and the ground.

9. The vehicle safety detection device according to any one of claims 1 to 8, characterized in that: It also includes a report printing module, which is connected to the control module; The report printing module is used to print the detection information of the vehicle to be detected.

10. A vehicle safety detection method, characterized in that: Applied to the vehicle safety detection device according to any one of claims 1 to 9, the method comprises: Obtain vehicle information of the vehicle to be detected; Determining a parameter to be measured according to the vehicle information; According to the parameter to be measured, a parameter content corresponding to the parameter to be measured is obtained through a detection module; wherein the detection module includes one or more of an insulation detection module, an equipotential measurement module and a vehicle data detection module; The detection information of the vehicle to be detected is generated according to the parameter content corresponding to the parameter to be measured.

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