Vehicle driver electrostatic discharge simulation modeling method and system

Abstract

The embodiment of the invention provides a whole vehicle driver electrostatic discharge simulation modeling method and system, and the method comprises the steps: firstly obtaining a simulation model, building an electrostatic discharge test platform according to the simulation model, and then carrying out the simulation prediction through the electrostatic discharge test platform, so as to obtain simulation result data, and an optimization design scheme is generated according to the simulation result data. According to the method, simulation modeling can be carried out on an electrostatic discharge transient electromagnetic interference condition, contact discharge and non-contact discharge are carried out on a driver through construction of an ESD excitation waveform and test simulation configuration, and electric field distribution and a cable electromagnetic coupling effect under electrostatic discharge radiation interference are obtained. Meanwhile, a PCB sensitive loop in the driver is extracted for simulation prediction under ESD interference, electric quantity information of a PCB cable and an IC input pin is obtained, and the accuracy of a simulation prediction result is improved. According to the method, a design optimization scheme is provided for ESD interference protection through simulation comparative analysis, the cost can be saved, and the efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of electrical and electronic technology, and in particular to a method and system for simulating and modeling electrostatic discharge of a vehicle drive. Background Art

[0002] Electrostatic discharge (ESD) is a physical phenomenon that can be applied to specific products using the principles of electrostatic discharge, such as electrostatic dust removal, electrostatic spraying, electrostatic separation, and electrostatic copying. However, ESD is also a hazard to electronic products and equipment, potentially causing malfunctions and even component damage.

[0003] During device operation, clothing or contact surfaces may carry charges, causing operational disturbances and even hardware damage. For example, semiconductor devices operate at relatively low voltages, making them highly sensitive to external electromagnetic interference. Electrostatic discharge (ESD) can cause electrostatic interference (ESD) in circuits containing semiconductor devices, damaging components, complementary metal-oxide-semiconductor (CMOS) circuits, and interface circuits.

[0004] The vehicle driver is the motor controller used to propel the vehicle. It is responsible for energy conversion and driving force control, and features energy feedback and various protection functions to ensure the vehicle's normal operation and safety. Because the vehicle driver of the motor drive system plays a crucial role in the vehicle, any malfunction caused by ESD interference could significantly jeopardize the vehicle's smooth operation. Therefore, to ensure the quality and reliability of the driver, simulation techniques can be used to replicate ESD interference and analyze the interference. Based on the analysis results, the cause of the ESD interference can be identified and appropriate corrective measures implemented. However, during ESD simulation and prediction, field simulation cannot be used to accurately determine the vehicle driver's response to ESD interference, and the limited analysis angles available reduce the accuracy of the simulation and prediction results. Summary of the Invention

[0005] In view of this, an embodiment of the present application provides a vehicle drive electrostatic discharge simulation modeling method and system to solve the problem of low accuracy of simulation prediction results in the ESD simulation prediction process.

[0006] According to one aspect of the present application, a vehicle drive electrostatic discharge simulation modeling method is provided, the method comprising:

[0007] Acquire a simulation model, wherein the simulation model includes a discharge gun simulation model and a driver simulation model; the discharge gun simulation model is a simplified three-dimensional model constructed based on simulated discharge parameters; the driver simulation model is a three-dimensional model constructed based on driver design parameters and cable design parameters; the simulated discharge parameters include contact discharge parameters and non-contact discharge parameters;

[0008] An electrostatic discharge test platform is built according to the simulation model, wherein the electrostatic discharge test platform includes a test table loaded into a simulation space and the simulation model; the simulation model is set on the test table;

[0009] Performing simulation prediction on the electrostatic discharge test platform to obtain simulation result data, wherein the simulation result data includes the electric field distribution of the driver, the power of the cable, and the input power of the sensitive element;

[0010] An optimized design solution is generated according to the simulation result data.

[0011] In some embodiments, obtaining a simulation model includes:

[0012] Setting the simulation discharge parameters according to a preset discharge mode;

[0013] An equivalent circuit is constructed according to the simulated discharge parameters, wherein the equivalent circuit includes an electrostatic generating capacitor, a charging branch, and a discharging branch; the charging branch and the discharging branch are respectively connected to two ends of the electrostatic generating capacitor;

[0014] Calculating discharge gun model parameters according to the simulated discharge parameters, the discharge gun model parameters including discharge gun shape, discharge gun material, and component parameters of the equivalent circuit;

[0015] Establishing a simplified three-dimensional model based on the discharge gun model parameters;

[0016] The circuit elements and excitation ports of the equivalent circuit are added to the simplified three-dimensional model to obtain the discharge gun simulation model.

[0017] In some embodiments, obtaining a simulation model includes:

[0018] Get drive design data;

[0019] extracting driver design parameters and cable design parameters from the driver design data;

[0020] Constructing a box model and a circuit board model according to the design parameters, wherein the box model includes at least one connector;

[0021] Constructing a cable model according to the cable design parameters, wherein the cable model is a coaxial cable model having a shielding layer braiding density equal to a preset density value; the cable model includes at least one of a single-core wire model, a double-core wire model, and a twisted-pair wire model;

[0022] The circuit board model is set in the box model, and the circuit board model and the connector are connected through the cable model to obtain the driver simulation model.

[0023] In some embodiments, building an electrostatic discharge test platform according to the simulation model includes:

[0024] Loading the simulation model and the test desktop in a simulation space;

[0025] Acquiring excitation source parameters, and performing simulation parameter configuration according to the simulation model and the excitation source parameters;

[0026] Setting a placement position of the simulation model in the simulation space according to the simulation discharge parameters;

[0027] The grounding wire of the discharge gun simulation model is connected to the test table to form the electrostatic discharge test platform.

[0028] In some embodiments, setting the placement position of the simulation model in the simulation space according to the simulation discharge parameters includes:

[0029] Reading a discharge type from the simulated discharge parameters, the discharge type being contact discharge or non-contact discharge;

[0030] If the discharge type is contact discharge, setting the placement position to a first position, and setting the contact discharge parameters to the discharge gun simulation model; the first position is used to make the discharge gun simulation model contact the driver simulation model;

[0031] If the discharge type is non-contact discharge, the discharge position is set to a second position, and the non-contact discharge parameters are set to the discharge gun simulation model; the second position is used to make the distance between the discharge gun simulation model and the driver simulation model equal to a preset discharge interval; the preset discharge interval is calculated based on the non-contact discharge parameters and the dielectric constant of the spacing medium.

[0032] In some embodiments, generating an optimized design solution based on the simulation result data includes:

[0033] Acquiring a preset safety condition, wherein the preset safety condition includes an electric field distribution threshold and a power threshold;

[0034] If the simulation result data satisfies the preset safety condition, outputting the driver design parameters and cable design parameters corresponding to the driver simulation model;

[0035] If the simulation result data does not meet the preset safety condition, the driver simulation model is adjusted according to the simulation result data, and simulation prediction is re-executed based on the adjusted driver simulation model.

[0036] In some embodiments, adjusting the driver simulation model according to the simulation result data includes:

[0037] Extracting a data item to be optimized from the simulation result data, wherein the data item to be optimized is a data item in the simulation result data that does not meet the preset safety condition;

[0038] Searching for an object to be optimized according to the data item to be optimized, where the object to be optimized includes at least one of a box, a cable, and a circuit board;

[0039] Modifying the driver design parameters and / or cable design parameters corresponding to the target to be optimized in the driver simulation model;

[0040] Modeling is performed based on the modified driver design parameters and the cable design parameters to obtain an adjusted driver simulation model.

[0041] In some embodiments, re-performing simulation prediction based on the adjusted driver simulation model includes:

[0042] Loading the adjusted driver simulation model in the simulation space to replace the driver simulation model already loaded in the simulation space;

[0043] Based on the simulated discharge parameters, the adjusted driver simulation model is respectively subjected to contact discharge simulation prediction and non-contact discharge prediction to obtain re-simulation result data;

[0044] If the re-simulation result data satisfies the preset safety condition, outputting the driver design parameters and cable design parameters corresponding to the adjusted driver simulation model;

[0045] If the simulation result data does not meet the preset safety condition, the driver simulation model is adjusted according to the re-simulation result data, and simulation prediction is re-executed until the re-simulation result data meets the preset safety condition.

[0046] In some embodiments, adjusting the driver simulation model according to the re-simulation result data includes:

[0047] Comparing the simulation result data with the re-simulation result data to determine a key optimization data item, wherein the key optimization data item is a data item in the re-simulation result data whose difference with the simulation result data is greater than or equal to a preset difference threshold;

[0048] identifying key design parameters based on the key optimization data items, wherein the key design parameters are driver design parameters and / or cable design parameters that have an impact on the key optimization data items;

[0049] Modify the key design parameters corresponding to the adjusted driver simulation model.

[0050] According to another aspect of the present application, a vehicle drive electrostatic discharge simulation modeling system is provided, the system comprising:

[0051] A model loading module is used to obtain a simulation model, wherein the simulation model includes a discharge gun simulation model and a driver simulation model; the discharge gun simulation model is a simplified three-dimensional model constructed based on simulated discharge parameters; the driver simulation model is a three-dimensional model constructed based on driver design parameters and cable design parameters; the simulated discharge parameters include contact discharge parameters and non-contact discharge parameters;

[0052] A test platform module, configured to construct an electrostatic discharge test platform according to the simulation model, wherein the electrostatic discharge test platform comprises a test table loaded into a simulation space and the simulation model; the simulation model is disposed on the test table;

[0053] A simulation module, configured to perform simulation prediction using the electrostatic discharge test platform to obtain simulation result data, wherein the simulation result data includes the electric field distribution of the driver, the power of the cable, and the input power of the sensitive element;

[0054] The optimization design module is used to generate an optimization design solution based on the simulation result data.

[0055] According to another aspect of the present application, a computer device is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor. When the processor executes the program, the above-mentioned vehicle drive electrostatic discharge simulation modeling method is implemented.

[0056] According to another aspect of the present application, a storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the above-mentioned vehicle drive electrostatic discharge simulation modeling method is implemented.

[0057] By means of the above technical solution, the embodiment of the present application provides a method and system for simulating and modeling electrostatic discharge of a whole vehicle driver. The method can first obtain a simulation model, and build an electrostatic discharge test platform according to the simulation model, and then perform simulation prediction through the electrostatic discharge test platform to obtain simulation result data, thereby generating an optimized design scheme based on the simulation result data. The method can simulate and model the transient electromagnetic interference of electrostatic discharge, and perform contact discharge and non-contact discharge on the driver by constructing an ESD excitation waveform and a test simulation configuration to obtain the electric field distribution and cable electromagnetic coupling effect under electrostatic discharge radiation interference. At the same time, the PCB sensitive circuit in the driver is extracted for simulation prediction under ESD interference, and the power information of the PCB cable and IC input pin is obtained to improve the accuracy of the simulation prediction results. Moreover, after optimizing the driver structure, harness design, PCB layout and wiring design, and adding filtering protection devices based on the simulation prediction results, a simulation comparative analysis is performed to provide a design optimization scheme for ESD interference protection of the equipment, which can save design costs and improve design efficiency.

[0058] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0060] Figure 1 A schematic diagram of the vehicle drive structure provided in an embodiment of the present application;

[0061] Figure 2 A schematic diagram of the circuit board structure provided in an embodiment of the present application;

[0062] Figure 3 A schematic flow chart of a vehicle driver electrostatic discharge simulation modeling method provided in an embodiment of the present application;

[0063] Figure 4 Schematic diagram of an equivalent circuit provided in an embodiment of the present application;

[0064] Figure 5 A schematic diagram of a discharge gun simulation model provided in an embodiment of the present application;

[0065] Figure 6 A schematic diagram of an electrostatic discharge waveform provided in an embodiment of the present application;

[0066] Figure 7 Schematic diagram of an electrostatic discharge test platform provided in an embodiment of the present application;

[0067] Figure 8 A schematic diagram of the electric field distribution simulation results of the driver provided in the embodiment of the present application;

[0068] Figure 9 A schematic diagram of the time-domain current simulation results of coupling on a single-core wire provided in an embodiment of the present application;

[0069] Figure 10 A schematic diagram of the time-domain current simulation results of the coupling on the dual-core wires provided in an embodiment of the present application;

[0070] Figure 11 A schematic diagram of the time-domain current simulation results of coupling on a twisted pair provided in an embodiment of the present application;

[0071] Figure 12 A schematic diagram of time-domain current simulation results of coupling on a coaxial line with a 60% shielding density provided in an embodiment of the present application;

[0072] Figure 13 A schematic diagram of time-domain current simulation results of coupling on a coaxial line with an 80% shielding density provided in an embodiment of the present application;

[0073] Figure 14 A schematic diagram of the simulation results of the current on the PCB transmission line before adding the TVS tube according to an embodiment of the present application;

[0074] Figure 15 A schematic diagram of the simulation results of the current on the PCB transmission line after adding a TVS tube according to an embodiment of the present application;

[0075] Figure 16 Schematic diagram of the structure of the vehicle drive electrostatic discharge simulation modeling system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0076] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0077] In the embodiments of this application, a vehicle drive refers to the drive system used to propel a vehicle. For example, a vehicle drive can drive the motor of an electric vehicle or other electric vehicle. The vehicle drive is one of the core components of the vehicle's powertrain, responsible for converting electrical energy into mechanical energy to propel the vehicle.

[0078] In some embodiments, the vehicle driver may include components such as a housing 1, a circuit board 2, and cables 3. The housing 1 is also called a shell, and is used to provide support, protection, and shielding for internal components. The housing 1 may be configured in a specific shape based on vehicle specifications and vehicle design space. For example, Figure 1 As shown, the housing 1 can be a rectangular parallelepiped structure. Furthermore, to provide support for the internal components, the housing 1 can be provided with support components for mounting the internal components, such as bosses, ribs, and openings. The housing 1 can also be provided with a connector 4, which can be installed in an opening in the side wall of the housing 1 and is used to connect the internal components to the external cable 3. Furthermore, since the internal components of the housing 1 generate heat during operation, the housing 1 can also be provided with heat dissipation structures such as heat dissipation holes and a heat dissipation net.

[0079] like Figure 2 As shown, the circuit board 2 may include a printed circuit board (PCB) and electronic components arranged on the PCB. For example, the electronic components on the PCB may include a motor controller, which may control the operating state of the motor according to the vehicle's driving requirements, such as acceleration, deceleration, and reversing. The vehicle driver precisely controls the motor's speed and torque by adjusting the motor's voltage, current, and frequency. To this end, the motor controller may include power electronic devices, a control chip, and a heat dissipation system. Depending on the specifications of the specific application vehicle, the power electronic device may be an insulated gate bipolar transistor (IGBT) or a metal-oxide-semiconductor field-effect transistor (MOSFET). The control chip may be a digital signal processor (DSP) or a field programmable gate array (FPGA) to meet different control function requirements.

[0080] The electronic components on the PCB board can also include other types of circuit devices, such as resistors, capacitors, inductors, diodes, transistors, signal processing modules, drive modules, power supply modules, etc. These circuit devices can form circuits with specific functions to meet different functional requirements.

[0081] Cable 3 is a conductive wire used to connect electronic components, circuit board 2, and external devices (such as motors). Depending on the specific type and method of power transmission, cable 3 used in the vehicle drive can include single-core wire, dual-core wire, twisted pair wire, etc. To meet insulation and shielding requirements, the braid density of cable 3's shield layer must be greater than or equal to a preset density threshold. For example, cable 3 is a coaxial cable with a shield braid density of 60% and 80%.

[0082] The vehicle drive is connected to the vehicle's battery pack via a cable, providing DC power input. This DC power is then converted to AC power by an inverter and supplied to the motor. While the vehicle is in motion, the motor, following instructions from the motor controller, converts electrical energy into mechanical energy, driving the wheels. Furthermore, during braking or coasting, the motor functions as a generator, converting mechanical energy from the wheels into electrical energy, which is then fed back to the battery via the motor controller's rectifier, achieving energy recovery. Consequently, the high reliability of the vehicle drive reduces failure rates and lowers maintenance costs.

[0083] Since the vehicle drive includes semiconductor devices such as power electronics and control chips, and semiconductor devices are easily affected by electrostatic discharge (ESD) and may fail or be damaged, the vehicle drive's tolerance to ESD directly affects its reliability. Electrostatic discharge refers to the physical phenomenon caused by the rapid transfer of charge when two objects with different electrical potentials come into contact. In electronic devices, electrostatic discharge may damage sensitive semiconductor devices and cause equipment failure. Therefore, anti-static measures such as electrostatic shielding covers, structural overlap, cable shielding, and component layout design are required during electronic manufacturing and maintenance.

[0084] Based on the operating environment of the entire vehicle drive during operation, the primary ESD damage mechanisms can be determined to be thermal failure and insulation breakdown. Thermal failure is caused by the heat generated by the ESD current, leading to thermal failure of the device; insulation breakdown is caused by the high voltage induced by the ESD. Both thermal failure and insulation breakdown can occur simultaneously within a single device. For example, insulation breakdown can induce high currents, further leading to thermal failure.

[0085] In addition to easily damaging circuits, electrostatic discharge (ESD) can also easily interfere with electronic circuits. This interference can include both conducted and radiated interference. Conducted interference occurs when a portion of the circuit forms a discharge path, meaning that the ESD current directly intrudes into the circuitry within the device. For example, when ESD acts on traces and pins on a printed circuit board (PCB), I / O interface terminals on a device, or the core wires of a coaxial socket, the ESD current can flow through the input terminals of the integrated circuit, causing internal signal interference.

[0086] Radiated interference is caused by spike currents generated by sparks during electrostatic discharge. Because spike currents can contain abundant high-frequency components, these high-frequency components can generate radiated magnetic and electric fields. These fields can then induce interference electromotive forces in the various signal loops of nearby circuits. Because large current changes occur in a very short period of time, the interference electromotive force generated in the signal loop is likely to exceed the threshold level of the logic circuit, causing false triggering.

[0087] In some embodiments, in order to ensure the quality and reliability of the vehicle driver, ESD interference phenomena can be reproduced during the design phase of the vehicle driver using simulation and other means, and the interference situation can be analyzed. Based on the analysis results, the cause of the ESD interference can be found and corresponding improvement measures can be taken.

[0088] When simulating electrostatic discharge (ESD) on a vehicle drive, a simulation application can be run on a computer or other electronic device with data processing capabilities. A 3D modeling application can be used to build a model of the vehicle drive. The simulation environment can then be set, defining the ESD source, setting boundary conditions, and adding interference sources and sensitive points. Simulation calculations are then performed based on these parameters. During the simulation, electromagnetic simulation applications such as ANSYS HFSS, CST Studio Suite, and COMSOL Multiphysics can be used to calculate the electric field distribution around the vehicle drive during ESD, the current path, and the impact on sensitive components based on the model, boundary conditions, and discharge source information. Simulation results are then generated. After analyzing and evaluating the simulation results, optimization and improvement plans are identified.

[0089] In some embodiments, an ESD simulation circuit can be constructed based on the internal circuit structure of the vehicle driver. This simulation circuit can be used to implement ESD excitation. The simulation circuit can include a discharge module with variable-capacitance capacitors and variable-resistance resistors to accommodate discharge network requirements of different standards. During simulation analysis, the simulation circuit can be used as an excitation source. However, since the simulation circuit cannot simulate and predict ESD events for an actual vehicle driver, it is impossible to determine the vehicle driver's response to ESD interference through field simulation.

[0090] In some embodiments, the ESD protection capability can also be evaluated by comparing the maximum electric field with the critical electric field, thereby simplifying the ESD protection simulation to suit the simulation needs of the entire vehicle driver. By applying an ESD pulse to the circuit to be protected, the peak electric field of the circuit to be protected and the ESD protection device is obtained, and the ESD protection capability is analyzed by comparison. However, this simulation method only performs simulation predictions on ESD protection devices, and cannot analyze the ESD performance of the device's own structure, overlap, cable design, PCB design, etc., and the analysis angle is relatively limited. It can be seen that in the ESD simulation prediction process, it is impossible to obtain the response of the entire vehicle driver under ESD interference through field simulation, and there are fewer analysis angles, which reduces the accuracy of the simulation prediction results.

[0091] In order to solve the problem of low accuracy of the simulation prediction results in the ESD simulation prediction process, some embodiments of this application provide a whole vehicle driver electrostatic discharge simulation modeling method, which can be applied to electronic devices with data processing capabilities and display functions. For ease of description, in the embodiments of this application, electronic devices such as computers are used as the execution subjects of the whole vehicle driver electrostatic discharge simulation modeling method. It should be understood that the method can also be applied to other types of execution subjects, such as servers, cloud computing network applications, mobile terminals, etc., which are no longer shown one by one in the embodiments of this application. Figure 3 As shown, the method includes:

[0092] S101: Acquire a simulation model.

[0093] To perform simulation predictions for the entire vehicle drive, a simulation model can be obtained. This model is constructed using a 3D modeling application based on actual product parameters. This model can include a discharge gun simulation model and a driver simulation model. The discharge gun simulation model is a simplified 3D model constructed based on simulated discharge parameters and serves as the electrostatic discharge excitation source during the simulation prediction process.

[0094] The simulation discharge parameters can be set according to the predetermined simulation prediction mode for the vehicle driver. When it is necessary to simulate and predict the contact discharge and non-contact discharge forms of the vehicle driver, the simulation discharge parameters include contact discharge parameters and non-contact discharge parameters.

[0095] Contact discharge is a method of discharge in which the electrodes of an ESD generator are brought into direct contact with the device under test, triggering discharge. Non-contact discharge involves bringing the electrodes of an ESD generator close to the device under test until a spark gap forms between them, triggering discharge. Because the vehicle drive operates in a normal operating environment, with air as the medium between the electrodes and the device, non-contact discharge can also be referred to as air discharge.

[0096] Contact discharge is suitable for devices with metal casings or external interfaces. It can directly simulate the discharge that occurs when a person or conductive object comes into contact with the device. Air discharge can be used in situations where contact discharge is not possible, such as when the device surface is coated with an insulating layer or has gaps. It can more realistically simulate the actual electrostatic discharge process.

[0097] During simulations, the waveform generated by contact discharge can exhibit very sharp rises and falls, resulting in potentially very high transient currents and placing high demands on the device's tolerance. The waveform generated by air discharge is relatively flat, but the voltage spikes can be high. The reproducibility of air discharge is affected by the approach speed of the discharge head, humidity, and the test equipment structure, resulting in variations in pulse rise time and discharge current amplitude.

[0098] A discharge gun simulation model constructed based on simulated discharge parameters can serve as an electrostatic discharge generator during a simulation. In some embodiments, to obtain the discharge gun simulation model within the simulation model, the simulated discharge parameters can be set according to a preset discharge method, and then an equivalent circuit can be constructed based on the simulated discharge parameters. The equivalent circuit includes an electrostatic generating capacitor, a charging branch, and a discharging branch; the charging branch and the discharging branch are respectively connected to the two ends of the electrostatic generating capacitor.

[0099] For example, Figure 4 As shown, taking the human-metal discharge model (BMM) as an example, it simulates the situation where a charged human body holds a metal object (such as a key, etc.) and discharges it to other objects. The equivalent circuit, as an equivalent model of the electrostatic discharge generation circuit, can include a 150pF electrostatic generating capacitor. The charging branch includes a charging power supply with a typical voltage of 5kV and a charging switch. After the charging switch is closed, the 5kV charging power supply can charge the 150pF electrostatic generating capacitor. The discharge branch may include a discharge control device group, a discharge switch, and a load module. After the discharge switch is closed, discharge can be provided through the 150pF electrostatic generating capacitor.

[0100] The discharge control component group can include multiple resistors, capacitors, and inductors, each designed to simulate different real-world discharge environments. For example, a 10nH inductor connected in series with a lossless transmission line with a characteristic impedance of 225Ω and a propagation time of 3.3ns simulates a grounding cable connected to the ground. The 10nH inductor is used to connect the grounding cable to a metal wall. A 15pF capacitor can simulate the capacitive coupling between the ESD discharge gun and the metal wall. A 150pF resistor represents the human body discharge capacitance. A 50Ω resistor represents the ESD generator case resistance. A 100Ω resistor represents the equivalent resistance of a handheld metal object. A 10pF resistor represents the equivalent capacitance of a handheld metal object. A 2pF resistor represents the hand and forearm capacitance. A 330Ω resistor represents the human body discharge resistance. A 10nH resistor represents the grounding cable inductance. The ESD tip is modeled by a 25Ω resistor with a 0.2μH inductance.

[0101] After constructing the equivalent circuit, discharge gun model parameters can be calculated based on the simulated discharge parameters. The discharge gun model parameters include the discharge gun shape, discharge gun material, and component parameters of the equivalent circuit. A simplified three-dimensional model is then created based on the discharge gun model parameters. Circuit components and excitation ports of the equivalent circuit are added to the simplified three-dimensional model to obtain the discharge gun simulation model.

[0102] In the modeling process, a simplified three-dimensional model can be established in simulation applications such as CST Microwave Studio according to the actual shape, material and equivalent circuit resistance, inductance and capacitance (RLC) components of the discharge gun. The RLC components and excitation ports required by the equivalent circuit are added to the simplified three-dimensional model to obtain the discharge gun simulation model. The established simulation model is as follows: Figure 5 As shown in Figure 2, the 8kV electrostatic waveform generated by this model meets the waveform requirements of the standard discharge current in the IEC standard, as shown in Figure 2. Figure 6 shown.

[0103] The driver simulation model serves as the device under test during the simulation prediction process. The driver simulation model is a three-dimensional model constructed based on driver design parameters and cable design parameters. To construct the driver simulation model, in some embodiments, when acquiring the simulation model, the electronic device may first obtain driver design data and extract driver design parameters and cable design parameters from the driver design data. A housing model and a circuit board model are then constructed based on the design parameters, and a cable model is constructed based on the cable design parameters. The housing model includes at least one connector. The cable model is a coaxial cable model with a shielding layer braiding density equal to a preset density value; the cable model includes at least one of a single-core wire model, a double-core wire model, and a twisted-pair wire model.

[0104] Based on the established circuit board model and box model, the driver simulation model can be obtained by setting the circuit board model in the box model and connecting the circuit board model and the connector through the cable model.

[0105] For example, electronic devices extract and model the design parameters of the driver and interconnecting cables, and import the PCB 3D models of the driver board, control board, etc. into the driver model. The driver simulation model structure based on the driver design parameters is as follows: Figure 1 As shown, the driver simulation model can include a housing model, a cable model, and a circuit board model. The cable model is a coaxial cable model constructed based on cable design parameters. The cable model can connect to the connector provided on the housing model. Since the cables connected by the connector can include single-core, dual-core, twisted-pair, and coaxial cables with shielding densities of 60% and 80%, cable models with different structures can be created based on the specific coaxial cable type. The PCB model is built into the driver housing model and connected to the connector and cable models to form the driver simulation model.

[0106] S102: Building an electrostatic discharge test platform according to the simulation model.

[0107] After obtaining the simulation model, an electrostatic discharge test platform can be built according to the simulation model. The electrostatic discharge test platform includes a test table 5 loaded into the simulation space and the simulation model (driver simulation model 61, discharge gun simulation model 62), and the simulation model is set on the test table 5. When building an ESD test simulation platform, it is necessary to configure the test table, excitation source, simulation, etc. Figure 7 shown.

[0108] In some embodiments, when building an electrostatic discharge test platform based on the simulation model, the electronic device can load the simulation model and a test table in a simulation space, obtain excitation source parameters, and perform simulation parameter configuration based on the simulation model and excitation source parameters. The placement of the simulation model in the simulation space is then set based on the simulated discharge parameters, and the ground wire of the discharge gun simulation model is connected to the test table to form the electrostatic discharge test platform.

[0109] A simulation space provides a virtual environment for simulation analysis applications, such as the ESD analysis field provided by CST Microwave Studio. You can load a simulation model and test bench into the simulation space and perform ESD simulations based on the loaded model. After loading the model, you need to configure simulation parameters based on the simulation model and excitation source parameters. For example, simulation parameter configuration can include defining the ESD source, setting boundary conditions, and adding interference sources and sensitive points. Defining the ESD source involves setting parameters such as the ESD source location, voltage, and current waveform in the simulation software. Test standards require simulating ESD waveforms based on a human body model (HBM) or machine model (MM). Setting boundary conditions involves defining the boundaries of the simulation area, such as the grounding location and the electromagnetic characteristics of the surrounding environment, to ensure that the ESD path and distribution meet predetermined requirements. When setting boundary conditions, you can connect the discharge gun ground cable to the test bench to perform grounding. Adding interference sources and sensitive points means clearly marking sensitive points in the model that may be susceptible to ESD interference, such as pins on electronic components and signal lines, as well as potential interference sources, such as metal parts near the discharge point.

[0110] During the electrostatic discharge simulation, an electrostatic gun can be directed toward the driver connector to discharge the device. Therefore, the placement of the simulation model in the simulation space can be set based on the simulated discharge parameters. In some embodiments, when setting the placement of the simulation model in the simulation space based on the simulated discharge parameters, the electronic device can first read the discharge type from the simulated discharge parameters, where the discharge type is either contact discharge or non-contact discharge. Different placement positions can then be set based on the different discharge types.

[0111] If the discharge type is contact discharge, the placement position is set to a first position, and the contact discharge parameters are set to the discharge gun simulation model. The first position is used to place the discharge gun simulation model in contact with the driver simulation model. Specifically, when the discharge type is contact discharge, the discharge head of the discharge gun simulation model can be set to contact a position corresponding to the connector of the driver simulation model, and the contact discharge parameters are set to the discharge gun simulation model so that the discharge gun simulation model generates a discharge current at the discharge head according to the contact discharge parameters, which is then transmitted to the interior of the driver simulation model through the contact connector.

[0112] If the discharge type is non-contact discharge, the discharge position is set to a second position, and the non-contact discharge parameters are assigned to the discharge gun simulation model. The second position is configured to ensure that the distance between the discharge gun simulation model and the driver simulation model is equal to a preset discharge interval. Specifically, when the discharge type is air discharge, the discharge head of the discharge gun simulation model and the connector of the driver simulation model can be positioned close to each other but separated by a predetermined distance. This distance, the preset discharge interval, can be calculated based on the non-contact discharge parameters and the dielectric constant of the intervening medium.

[0113] The preset discharge interval is the maximum distance that can generate sparks, calculated based on the dielectric constant of the dielectric material at the discharge voltage corresponding to the non-contact discharge parameters. For example, when the discharge gun simulation model performs air discharge simulation, the discharge voltage generated at the discharge head is 5kV, and the dielectric medium between the discharge head and the driver connector is air, which has a corresponding dielectric constant of 8.85×10 -12 F / m; then according to the discharge voltage and the air dielectric constant, the spacing distance can be calculated to be 5000×8.85×10 -12 =4.425×10 -8 m.

[0114] S103 , performing simulation prediction through the electrostatic discharge test platform to obtain simulation result data.

[0115] After establishing an ESD test platform, electronic devices can use it to perform simulation predictions to obtain simulation result data. To this end, electronic devices can run an application approved for electromagnetic simulation prediction analysis, such as ANSYS HFSS, CST Studio Suite, or COMSOL Multiphysics. Simulation parameters such as the simulation algorithm, meshing accuracy, and number of iterations can then be set. The meshing accuracy must meet preset accuracy requirements to accurately capture detailed changes in the electrostatic field. Based on the set simulation algorithm, simulation calculations can be initiated. The simulation prediction analysis application can then calculate the electric field distribution around the vehicle driver, the current path, and the impact on sensitive components during the ESD process based on the set model, boundary conditions, and discharge source information, thereby obtaining simulation result data. The simulation result data includes the driver's electric field distribution, cable charge, and sensitive component input charge. In other words, simulation predictions based on the simulation model can reveal the driver's electric field distribution, voltage or current information on interconnecting cables, and voltage or current information on PCB transmission lines and sensitive chip input pins.

[0116] For example, by performing contact discharge and air discharge simulations on a driver simulation model, we can analyze the field distribution and cable electromagnetic coupling effects under ESD radiation interference. Furthermore, we can extract sensitive circuits within the PCB model within the driver simulation model and, through simulation predictions under ESD interference, obtain information on the electric field, voltage, and current at the PCB transmission lines and IC input pins.

[0117] Taking the 8kV contact discharge simulation results as an example, the electric field distribution simulation results of the driver simulation model in the discharge simulation environment are as follows: Figure 8 As shown, the simulation results of cable electromagnetic coupling effect may include: time domain current simulation results of coupling on single core line, such as Figure 9 As shown; the time domain current simulation results of the coupling on the double-core line are as follows Figure 10 As shown in the figure; the time domain current simulation results of the coupling on the twisted pair are as follows: Figure 11 As shown in the figure; the time domain current simulation results of the coupling on the 60% shielding density coaxial line are as follows: Figure 12 As shown in the figure; the time domain current simulation results of the coupling on the 80% shielding density coaxial line are as follows: Figure 13 shown.

[0118] S104: Generate an optimized design solution based on the simulation result data.

[0119] After obtaining simulation results through prediction, the electronic device generates an optimized design based on these data. Specifically, the electronic device determines that the design parameters of the driver simulation model meet the vehicle driver's tolerance requirements for electrostatic discharge (ESD). Based on the simulation results, the electronic device then determines an optimization plan, optimizing the driver structure, wiring harness design, PCB layout, and adding filtering and protection components.

[0120] In some embodiments, to generate an optimized design solution, the electronic device may first obtain preset safety conditions when generating the optimized design solution based on the simulation result data. These preset safety conditions include an electric field distribution threshold and a power threshold. A determination is then made as to whether the simulation result data satisfies the preset safety conditions. If the simulation result data satisfies the preset safety conditions, it indicates that the current vehicle driver design parameters meet the electrostatic discharge tolerance requirements. Therefore, the driver design parameters and cable design parameters corresponding to the driver simulation model may be output.

[0121] If the simulation result data does not meet the preset safety conditions, it means that the current design parameters of the vehicle driver cannot meet the tolerance requirements for electrostatic discharge phenomena and need to be optimized. Therefore, the driver simulation model can be adjusted according to the simulation result data, and the simulation prediction can be re-executed based on the adjusted driver simulation model.

[0122] For example, the simulation results can be used to determine whether each data item meets preset safety conditions. If the threshold for electromagnetic environment safety within the driver (such as the threshold for damage to sensitive chips) is exceeded, the driver's ESD interference protection design is optimized, including optimizations for the holes and overlaps in the enclosure, wiring shielding and routing, PCB layout and routing, and protection circuit design.

[0123] In some embodiments, when adjusting the driver simulation model based on the simulation result data, the electronic device may first extract data items to be optimized from the simulation result data, wherein the data items to be optimized are data items in the simulation result data that do not meet the preset safety conditions.

[0124] For example, by comparing the electric field distribution value of the driver with the electric field distribution threshold and determining that the electric field distribution value exceeds the preset electric field distribution threshold, the data item to be optimized can be determined to be the electric field distribution information of the driver. Similarly, by comparing the voltage or current information on the interconnect cable with the preset voltage threshold or current threshold and determining that the voltage value on the interconnect cable exceeds the preset voltage threshold, the data item to be optimized can be determined to be the voltage information on the interconnect cable.

[0125] After extracting the data item to be optimized, the target to be optimized can be searched based on the data item to be optimized, where the target to be optimized includes at least one of the enclosure 1, the cable, and the circuit board 2. For example, when the voltage value of a PCB transmission line exceeds a preset voltage threshold, the data item to be optimized can be determined to be the PCB transmission line voltage information, and the corresponding target to be optimized is circuit board 2. Similarly, when the current value at an IC input pin exceeds a preset current threshold, the data item to be optimized can be determined to be the current information at the IC input pin, and the corresponding target to be optimized is the IC input pin of circuit board 2.

[0126] After determining the target to be optimized, the driver simulation model can be adjusted to achieve optimized design by modifying the driver design parameters and / or cable design parameters corresponding to the target to be optimized in the driver simulation model. Different optimization design methods can be adopted for different targets to be optimized, that is, different design parameters can be modified.

[0127] For example, design optimization for the enclosure 1 can include increasing the thickness of the enclosure; optimizing aperture design, such as using conductive gaskets to seal gaps and reducing the number and size of openings; and optimizing structural joints, such as applying conductive anti-oxidation treatment to the enclosure joint surfaces. Design optimization for interconnect cables can include twisting sensitive signal lines; shielding cables with a braid density exceeding 80%. PCB design optimization can include layout design, such as moving sensitive chips away from connector interfaces; wiring design, such as shortening wiring lengths and reducing loop areas; and PCB design optimization, such as adding shielding covers to sensitive chips and adding protective devices such as TVS diodes and varistors to input pins.

[0128] After modifying the driver simulation model, modeling can be performed based on the modified driver design parameters and the cable design parameters to obtain an adjusted driver simulation model. To determine the effectiveness of the optimized design, in some embodiments, the electronic device can re-perform simulation prediction based on the adjusted driver simulation model. Specifically, the adjusted driver simulation model can be reloaded into the simulation space to replace the already loaded driver simulation model. Contact discharge simulation prediction and non-contact discharge simulation prediction can then be performed on the adjusted driver simulation model based on the simulated discharge parameters to obtain re-simulation result data.

[0129] According to the preset safety condition judgment method provided in the above embodiment, the re-simulation result data can be judged. If the re-simulation result data meets the preset safety conditions, it means that the design parameters corresponding to the adjusted driver simulation model can meet the tolerance requirements for electrostatic discharge phenomena. Therefore, the driver design parameters and cable design parameters corresponding to the adjusted driver simulation model can be output.

[0130] If the simulation result data does not meet the preset safety conditions, it means that the design parameters corresponding to the adjusted driver simulation model still do not meet the tolerance requirements for electrostatic discharge phenomena. Therefore, the driver simulation model can be adjusted according to the re-simulation result data, and the simulation prediction can be re-executed until the re-simulation result data meets the preset safety conditions.

[0131] For example, after optimizing the ESD protection design of the vehicle driver, simulation configuration can be performed based on the optimized driver simulation model, and simulation prediction can be run again to obtain the re-simulation result data, which can include the driver electric field distribution, cable electromagnetic coupling effect, and PCB transmission line and sensitive chip input pin voltage and current information. Figure 14 、 Figure 15As shown, there are significant differences in the current simulation results before and after adding a TVS diode to the PCB transmission line. Using the judgment method provided in the above embodiment, a determination is made as to whether the electric field distribution value, voltage value, and current value exceed a preset threshold. If any of these values ​​exceed the preset threshold, the driver ESD protection design needs to be further optimized, specifically by optimizing the design of the enclosure 1, interconnecting cables, and PCB.

[0132] Since many aspects can be optimized during driver ESD protection design optimization, in order to improve optimization efficiency, in some embodiments, when adjusting the driver simulation model based on the re-simulation result data, the electronic device can obtain simulation result data and compare the simulation result data with the re-simulation result data to determine key optimization data items. The key optimization data items are data items in the re-simulation result data whose difference from the simulation result data is greater than or equal to a preset difference threshold.

[0133] Then, based on the key optimization data items, key design parameters are identified, and the key design parameters corresponding to the adjusted driver simulation model are modified. The key design parameters are driver design parameters and / or cable design parameters that have an impact on the key optimization data items.

[0134] For example, by comparing simulation results with re-simulation results, if the data item with a difference greater than or equal to a preset difference threshold is determined to be the PCB transmission line current value, the key optimization data item can be determined to be the transmission line current information. Key design parameters can then be identified based on the key optimization data item, specifically parameters related to the transmission line current information, such as cable shielding, within the cable design parameters. Therefore, the cable braid density can be further increased based on the identified key design parameters.

[0135] By applying the technical solutions of the above embodiments, the vehicle driver electrostatic discharge simulation modeling method provided in the above embodiments can simulate and model electrostatic discharge transient electromagnetic interference, and construct ESD excitation waveforms and test simulation configurations. By simulating and predicting the driver through contact discharge and air discharge, the field distribution under electrostatic discharge radiation interference and the electromagnetic coupling effect of the cable are obtained. At the same time, the PCB sensitive circuit in the driver is extracted for simulation prediction under ESD interference, and the voltage and current information at the PCB transmission line and IC input pin is obtained. After simulation and comparative analysis by optimizing the driver structure, wiring harness design, PCB layout and wiring design, and adding filtering protection devices, a design optimization idea is provided for the ESD interference protection of the equipment, saving costs and improving design efficiency.

[0136] In some embodiments, as a specific implementation of the vehicle driver electrostatic discharge simulation modeling method described in the above embodiments, some embodiments of the present application also provide a vehicle driver electrostatic discharge simulation modeling system, such as Figure 16 As shown, the system includes:

[0137] A model loading module is used to obtain a simulation model, wherein the simulation model includes a discharge gun simulation model and a driver simulation model; the discharge gun simulation model is a simplified three-dimensional model constructed based on simulated discharge parameters; the driver simulation model is a three-dimensional model constructed based on driver design parameters and cable design parameters; the simulated discharge parameters include contact discharge parameters and non-contact discharge parameters;

[0138] A test platform module, configured to construct an electrostatic discharge test platform according to the simulation model, wherein the electrostatic discharge test platform comprises a test table loaded into a simulation space and the simulation model; the simulation model is disposed on the test table;

[0139] A simulation module, configured to perform simulation prediction using the electrostatic discharge test platform to obtain simulation result data, wherein the simulation result data includes the electric field distribution of the driver, the power of the cable, and the input power of the sensitive element;

[0140] The optimization design module is used to generate an optimization design solution based on the simulation result data.

[0141] By applying the technical solutions of the above embodiments, the vehicle drive electrostatic discharge simulation modeling system provided in the above embodiments can obtain a simulation model through the model loading module, then the test platform module builds an electrostatic discharge test platform based on the simulation model, and then the simulation module performs simulation prediction on the electrostatic discharge test platform to obtain simulation result data, so that the optimization design module generates an optimized design solution based on the simulation result data. The system can provide a design optimization solution for ESD interference protection of equipment, which can save design costs and improve design efficiency.

[0142] It should be noted that for other corresponding descriptions of the various functional units involved in the vehicle drive electrostatic discharge simulation modeling system provided in the embodiment of the present application, reference can be made to the corresponding descriptions in the vehicle drive electrostatic discharge simulation modeling method provided in the above embodiment, and will not be repeated here.

[0143] The embodiment of the present application also provides a computer device, which can be specifically a personal computer, a server, a network device, etc. The computer device includes a bus, a processor, a memory and a communication interface, and may also include an input and output interface and a display device. 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 computer program in the non-volatile storage medium. The database of the computer device is used to store location information. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, the steps in each method embodiment are implemented.

[0144] Those skilled in the art will understand that the structure of the above-mentioned computer device is only a partial 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, or combine certain components, or have a different component arrangement.

[0145] In one embodiment, a computer-readable storage medium is further provided. The computer-readable storage medium may be non-volatile or volatile, and stores a computer program thereon. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0146] In one embodiment, a computer program product is further provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0147] 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.

[0148] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program. 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.

[0149] Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, 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.

[0150] Volatile memory may include random access memory (RAM) or external cache memory. 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).

[0151] The database involved in each embodiment provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchain. The processor involved in each embodiment provided herein may be, but is not limited to, a general-purpose processor, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, and the like.

[0152] The technical features of the above embodiments can be combined arbitrarily. 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.

[0153] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A vehicle driver electrostatic discharge simulation modeling method, characterized in that: The method comprises: Acquire a simulation model, wherein the simulation model includes a discharge gun simulation model and a driver simulation model; the discharge gun simulation model is a simplified three-dimensional model constructed based on simulated discharge parameters; the driver simulation model is a three-dimensional model constructed based on driver design parameters and cable design parameters; the simulated discharge parameters include contact discharge parameters and non-contact discharge parameters; An electrostatic discharge test platform is built according to the simulation model, wherein the electrostatic discharge test platform includes a test table loaded into a simulation space and the simulation model; the simulation model is set on the test table; Performing simulation prediction on the electrostatic discharge test platform to obtain simulation result data, wherein the simulation result data includes the electric field distribution of the driver, the power of the cable, and the input power of the sensitive element; An optimized design solution is generated according to the simulation result data.

2. The method according to claim 1, characterized in that Get simulation models, including: Setting the simulation discharge parameters according to a preset discharge mode; An equivalent circuit is constructed according to the simulated discharge parameters, wherein the equivalent circuit includes an electrostatic generating capacitor, a charging branch, and a discharging branch; the charging branch and the discharging branch are respectively connected to two ends of the electrostatic generating capacitor; Calculating discharge gun model parameters according to the simulated discharge parameters, the discharge gun model parameters including discharge gun shape, discharge gun material, and component parameters of the equivalent circuit; Establishing a simplified three-dimensional model based on the discharge gun model parameters; The circuit elements and excitation ports of the equivalent circuit are added to the simplified three-dimensional model to obtain the discharge gun simulation model.

3. The method according to claim 1, characterized in that Get simulation models, including: Get drive design data; extracting driver design parameters and cable design parameters from the driver design data; Constructing a box model and a circuit board model according to the design parameters, wherein the box model includes at least one connector; Constructing a cable model according to the cable design parameters, wherein the cable model is a coaxial cable model having a shielding layer braiding density equal to a preset density value; the cable model includes at least one of a single-core wire model, a double-core wire model, and a twisted-pair wire model; The circuit board model is set in the box model, and the circuit board model and the connector are connected through the cable model to obtain the driver simulation model.

4. The method according to claim 1, wherein An electrostatic discharge test platform is built according to the simulation model, including: Loading the simulation model and the test desktop in a simulation space; Acquiring excitation source parameters, and performing simulation parameter configuration according to the simulation model and the excitation source parameters; Setting a placement position of the simulation model in the simulation space according to the simulation discharge parameters; The grounding wire of the discharge gun simulation model is connected to the test table to form the electrostatic discharge test platform.

5. The method according to claim 4, characterized in that Setting a placement position of the simulation model in the simulation space according to the simulation discharge parameters includes: Reading a discharge type from the simulated discharge parameters, the discharge type being contact discharge or non-contact discharge; If the discharge type is contact discharge, setting the placement position to a first position, and setting the contact discharge parameters to the discharge gun simulation model; the first position is used to make the discharge gun simulation model contact the driver simulation model; If the discharge type is non-contact discharge, the discharge position is set to a second position, and the non-contact discharge parameters are set to the discharge gun simulation model; the second position is used to make the distance between the discharge gun simulation model and the driver simulation model equal to a preset discharge interval; the preset discharge interval is calculated based on the non-contact discharge parameters and the dielectric constant of the spacing medium.

6. The method according to claim 1, wherein Generating an optimized design solution based on the simulation result data, including: Acquiring a preset safety condition, wherein the preset safety condition includes an electric field distribution threshold and a power threshold; If the simulation result data satisfies the preset safety condition, outputting the driver design parameters and cable design parameters corresponding to the driver simulation model; If the simulation result data does not meet the preset safety condition, the driver simulation model is adjusted according to the simulation result data, and simulation prediction is re-executed based on the adjusted driver simulation model.

7. The method according to claim 6, characterized in that Adjusting the driver simulation model according to the simulation result data includes: Extracting a data item to be optimized from the simulation result data, wherein the data item to be optimized is a data item in the simulation result data that does not meet the preset safety condition; Searching for an object to be optimized according to the data item to be optimized, where the object to be optimized includes at least one of a box, a cable, and a circuit board; Modifying the driver design parameters and / or cable design parameters corresponding to the target to be optimized in the driver simulation model; Modeling is performed based on the modified driver design parameters and the cable design parameters to obtain an adjusted driver simulation model.

8. The method according to claim 6, characterized in that Re-run simulation predictions based on the adjusted drive simulation model, including: Loading the adjusted driver simulation model in the simulation space to replace the driver simulation model already loaded in the simulation space; Based on the simulated discharge parameters, the adjusted driver simulation model is respectively subjected to contact discharge simulation prediction and non-contact discharge prediction to obtain re-simulation result data; If the re-simulation result data satisfies the preset safety condition, outputting the driver design parameters and cable design parameters corresponding to the adjusted driver simulation model; If the simulation result data does not meet the preset safety condition, the driver simulation model is adjusted according to the re-simulation result data, and simulation prediction is re-executed until the re-simulation result data meets the preset safety condition.

9. The method according to claim 8, characterized in that Adjusting the driver simulation model according to the re-simulation result data includes: Comparing the simulation result data with the re-simulation result data to determine a key optimization data item, wherein the key optimization data item is a data item in the re-simulation result data whose difference with the simulation result data is greater than or equal to a preset difference threshold; identifying key design parameters based on the key optimization data items, wherein the key design parameters are driver design parameters and / or cable design parameters that have an impact on the key optimization data items; Modify the key design parameters corresponding to the adjusted driver simulation model.

10. A vehicle driver electrostatic discharge simulation modeling system, characterized in that: The system comprises: A model loading module is used to obtain a simulation model, wherein the simulation model includes a discharge gun simulation model and a driver simulation model; the discharge gun simulation model is a simplified three-dimensional model constructed based on simulated discharge parameters; the driver simulation model is a three-dimensional model constructed based on driver design parameters and cable design parameters; the simulated discharge parameters include contact discharge parameters and non-contact discharge parameters; A test platform module, configured to construct an electrostatic discharge test platform according to the simulation model, wherein the electrostatic discharge test platform comprises a test table loaded into a simulation space and the simulation model; the simulation model is disposed on the test table; A simulation module, configured to perform simulation prediction using the electrostatic discharge test platform to obtain simulation result data, wherein the simulation result data includes the electric field distribution of the driver, the power of the cable, and the input power of the sensitive element; The optimization design module is used to generate an optimization design solution based on the simulation result data.

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