Arc protection control method and system for charging gun

Abstract

The invention relates to the field of charging methods, and provides a charging gun arc prevention control method and system. The method comprises the following steps: in response to a charging request of a user, when the surface temperature of an insulating shell of a charging gun plug is lower than a preset temperature, judging whether an ice layer exists on the surface of the insulating shell; if the ice layer exists, acquiring ice layer thickness distribution information and ice layer density distribution information on the surface of the insulating shell; removing an ice layer on the surface of the insulating shell based on the ice layer thickness distribution information and the ice layer density distribution information; and when the surface humidity of the metal terminal of the charging gun plug is greater than the preset humidity, carrying out drying treatment on the surface of the metal terminal based on a preset drying method. The method is helpful for preventing the occurrence of an arc discharge phenomenon.

Description

[0001] Method Domain This application relates to the field of charging methods, and more particularly to a method and system for arc prevention control of a charging gun.

[0002] Background Method With the rapid development of the new energy vehicle industry, the construction of electric vehicle charging infrastructure is becoming increasingly sophisticated. As a key component connecting charging piles and electric vehicles, the safety and reliability of the charging gun directly affect the stability of the charging process. In extremely cold regions such as Northeast my country, Inner Mongolia, and Northern Europe, winter temperatures often drop below -30°C, posing a severe challenge to charging equipment in low-temperature environments. Long-term outdoor exposure of charging guns easily leads to the formation of ice layers on their surfaces, which has become a significant factor affecting the normal operation of charging equipment.

[0003] In existing methods, when ice forms on the surface of the charging gun, the ice layer hinders the complete insertion of the charging gun into the vehicle's charging port, preventing the metal contact terminals from achieving the designed contact depth and pressure. Under these poor contact conditions, if the charging system starts and begins transmitting a large current, the increased contact resistance generates localized high temperatures at the contact surface, potentially leading to dangerous arcing. Arcing can damage the charging equipment and vehicle interface, and may also cause fires and other safety accidents, seriously threatening user safety and equipment integrity. Summary of the Invention

[0004] This application provides a method and system for arc prevention control of a charging gun, in order to solve the problems mentioned in the background method.

[0005] In a first aspect, this application provides a method for arc prevention control of a charging gun, comprising: In response to a user's charging request, when the surface temperature of the insulating shell of the charging gun plug is lower than a preset temperature, it is determined whether there is an ice layer on the surface of the insulating shell; If ice is present, obtain the ice thickness distribution information and ice density distribution information on the surface of the insulating shell; The ice layer on the surface of the insulating shell is removed based on the ice layer thickness distribution information and the ice layer density distribution information; When the surface humidity of the metal terminal of the charging gun plug is greater than the preset humidity, the surface of the metal terminal is dried according to the preset drying method.

[0006] Further, determining whether there is an ice layer on the surface of the insulating outer shell includes: After controlling the charging gun to vibrate for a preset duration based on preset vibration parameters, multiple ultrasonic detection devices evenly distributed on the inner wall of the charging gun storage slot are controlled to emit ultrasonic waves to the surface of the insulating shell at a preset frequency. After each of the ultrasonic detection devices receives the first echo, it is determined whether there is ice on the surface of the insulating shell based on the acoustic fingerprint feature of each first echo.

[0007] Further, the ice layer thickness distribution information and the ice layer density distribution information of the surface of the insulating shell are obtained, including: For each of the ultrasonic detection devices, when the ultrasonic detection device has ice on the corresponding position of the surface of the insulating shell, the ice layer density of the ultrasonic detection device at the corresponding position of the surface of the insulating shell is determined based on the acoustic fingerprint feature of the corresponding first echo of the ultrasonic detection device; and the ice layer density corresponding to each of the ultrasonic detection devices constitutes the ice layer density distribution information. For each of the ultrasonic detection devices, the ultrasonic propagation speed in the ice layer at the corresponding position of the surface of the insulating shell of the ultrasonic detection device is determined based on the ice layer density corresponding to the ultrasonic detection device, and the ice layer thickness of the ultrasonic detection device at the corresponding position of the surface of the insulating shell is determined based on the ultrasonic propagation speed, the first time at which the ultrasonic detection device receives the first echo, and the second time at which the ultrasonic detection device receives the second echo; and the ice layer thickness corresponding to each of the ultrasonic detection devices constitutes the ice layer thickness distribution information.

[0008] Further, the ice layer on the surface of the insulating shell is removed based on the ice layer thickness distribution information and the ice layer density distribution information, including: If the ice layer density corresponding to each of the ultrasonic detection devices is less than a preset ice layer density, an instruction is sent to a user to wipe the surface of the insulating shell. For each of the ultrasonic detection devices, when the ice layer density corresponding to the ultrasonic detection device is greater than a preset ice layer density, a target heating device at the corresponding position of the surface of the insulating shell of the ultrasonic detection device is determined, and a heating parameter corresponding to the target heating device is determined based on the ice layer density and the ice layer thickness corresponding to the ultrasonic detection device. For each of the target heating devices, the target heating device is controlled to heat the surface of the insulating shell based on the heating parameter corresponding to the target heating device. After each of the target heating devices completes heating the surface of the insulating shell, an instruction is sent to a user to wipe the surface of the insulating shell.

[0009] Further, when the humidity of the metal terminal surface of the charging gun plug is greater than a preset humidity, the metal terminal surface is dried based on a preset drying method, including: The metal terminal surface is subjected to multi-point humidity detection based on a preset multi-point humidity detection method. when any humidity value of the multi-point humidity detection result is greater than a preset humidity value, generating a drying parameter corresponding to a hot air drying device on an inner wall of the charging gun storage slot based on a current ambient temperature and the multi-point humidity detection result; controlling the hot air drying device to perform drying processing on the metal terminal surface based on the drying parameter until humidity of the metal terminal surface is not greater than the preset humidity.

[0010] Further, the multi-point humidity detection on the metal terminal surface based on the preset multi-point humidity detection method comprises: controlling a humidity sensor on the inner wall of the charging gun storage slot to move on the metal terminal surface with a preset running track and step length, and recording a mapping relationship between a first humidity value detected by the humidity sensor and each stay position of the humidity sensor.

[0011] Further, the controlling the hot air drying device to perform drying processing on the metal terminal surface based on the drying parameter until humidity of the metal terminal surface is not greater than the preset humidity comprises: In the process of controlling the hot air drying device to perform drying processing on the metal terminal surface based on the drying parameter, the humidity sensor is controlled to move on the metal terminal surface with a preset running track and step length, and a mapping relationship between a second humidity value detected by the humidity sensor and each stay position of the humidity sensor is recorded, until the second humidity value corresponding to each stay position is less than the preset humidity, and the hot air drying device is controlled to stop running.

[0012] In a second aspect, the present application provides a charging gun anti-arc control system, comprising: a judgment module configured to, in response to a user's charging request, judge whether there is ice layer on the surface of the insulating shell of the charging gun plug when the surface temperature of the insulating shell is lower than a preset temperature; an acquisition module configured to, if there is ice layer on the surface of the insulating shell, acquire ice layer thickness distribution information and ice layer density distribution information of the surface of the insulating shell; an ice layer removal module configured to remove the ice layer on the surface of the insulating shell based on the ice layer thickness distribution information and the ice layer density distribution information; a drying processing module configured to, if humidity of the metal terminal surface of the charging gun plug is greater than a preset humidity, perform drying processing on the metal terminal surface based on a preset drying method. The application provides a charging gun arc prevention control method and system. The method comprises the following steps: in response to a user's charging request, determining whether there is ice on the surface of the insulating shell of the charging gun plug when the surface temperature of the insulating shell is lower than a preset temperature; if there is ice, obtaining the ice thickness distribution information and the ice density distribution information of the surface of the insulating shell; removing the ice on the surface of the insulating shell based on the ice thickness distribution information and the ice density distribution information; and when the humidity of the surface of the metal terminal of the charging gun plug is greater than a preset humidity, performing drying treatment on the surface of the metal terminal based on a preset drying method. The method helps to prevent the occurrence of arc discharge. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the method scheme of the embodiments of the application, the drawings required in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 The flowchart of the charging gun arc prevention control method provided by the embodiments of the application is shown in the figure. Figure 2 The structure schematic block diagram of the charging gun arc prevention control system provided by the embodiments of the application is shown in the figure. Figure 3 The structure schematic block diagram of the terminal device provided by the embodiments of the application is shown in the figure. DETAILED DESCRIPTION

[0015] The method scheme in the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0016] The flowchart shown in the drawings is only an example and does not necessarily include all the contents and operations / steps, and does not necessarily be executed in the described order. For example, some operations / steps can be decomposed, combined or partially merged, so that the actual execution order can be changed according to the actual situation.

[0017] It should also be understood that the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in the specification and the appended claims of the application, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0018] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the relevant listed items and all possible combinations, and includes such combinations.

[0019] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] Please see Figure 1 , Figure 1 This is a flowchart illustrating the arc prevention control method for charging guns provided in an embodiment of this application, as shown below. Figure 1 As shown, the anti-arc control method for charging guns provided in this application includes steps S1 to S4.

[0021] Step S1: In response to the user's charging request, when the surface temperature of the insulating shell of the charging gun plug is lower than the preset temperature, determine whether there is an ice layer on the surface of the insulating shell.

[0022] It should be noted that the execution subject of this embodiment is the charging gun anti-arc control system.

[0023] Specifically, upon receiving a charging request from a user, the system first detects the surface temperature of the insulating shell using temperature sensors located on its surface. When the detected surface temperature is lower than a preset temperature, the system automatically initiates an ice detection procedure. The system determines the presence of ice by analyzing changes in the physical properties of the insulating shell surface, primarily based on the significant differences in physical properties between ice and normal insulating materials. This method can identify the presence of ice in extremely cold environments, preventing poor contact between the charging gun and the vehicle's charging port due to ice obstruction. This effectively prevents the risk of arc discharge caused by powering on incompletely connected conditions, ensuring the safety of the charging process.

[0024] Step S2: If ice layer exists, obtain the ice layer thickness distribution information and ice layer density distribution information on the surface of the insulating shell.

[0025] Specifically, once the presence of an ice layer on the surface of the insulating shell is confirmed, the system obtains detailed characteristic parameters of the ice layer through a multi-parameter joint measurement method. The system adopts a method of first measuring density and then calculating thickness. First, the ice layer density is determined by analyzing its physical response characteristics; this method can independently obtain density information without relying on other unknown parameters. Then, based on the measured ice layer density, the ultrasonic wave propagation speed in the ice layer of that density is calculated using the physical properties of ice. Finally, the ice layer thickness is calculated using an ultrasonic detection method based on the known ultrasonic wave propagation speed and signal propagation characteristics. By measuring at multiple locations on the surface of the insulating shell, complete information on the ice layer thickness and density distribution is obtained. This method solves the measurement error problem caused by parameter interdependence in traditional measurement methods, significantly improving the accuracy and reliability of ice layer parameter measurement.

[0026] Step S3: Remove the ice layer from the surface of the insulating shell based on the ice layer thickness distribution information and the ice layer density distribution information.

[0027] Specifically, the system formulates personalized de-icing strategies based on the obtained ice thickness and density distribution information. Different treatment methods are used for ice layers of different densities and thicknesses: loose ice layers with lower density can be removed mechanically due to their weak adhesion; dense ice layers with higher density require heating to melt them. The system has a built-in intelligent de-icing algorithm that can automatically calculate the required heating power, heating time, and heating area based on the specific characteristic parameters of the ice layer, achieving precise regional heating control. The processing effect is monitored in real time during the heating process to ensure thorough de-icing while avoiding overheating and equipment damage. This method can select the most suitable de-icing method according to the actual situation of the ice layer, ensuring de-icing effect while avoiding energy waste, and preventing contact problems caused by incomplete de-icing.

[0028] Step S4: When the surface humidity of the metal terminal of the charging gun plug is greater than the preset humidity, the surface of the metal terminal is dried according to the preset drying method. Specifically, the system detects the humidity level of the metal terminals on the charging gun plug using a humidity detection method. When the humidity on the metal terminal surface exceeds a preset threshold, a drying process is immediately initiated. The drying process employs hot air drying, and the system automatically adjusts drying parameters based on ambient temperature and humidity conditions, paying particular attention to preventing ice formation on the metal terminal surface in low-temperature environments. The drying process is controlled in a closed loop, with real-time feedback on the drying effect via humidity detection, dynamically adjusting the drying intensity until the humidity on the metal terminal surface drops to a safe range. This method effectively removes moisture from the metal terminal surface, preventing increased contact resistance and arcing caused by dampness, thus ensuring the safety and reliability of the charging process.

[0029] In some embodiments, determining whether there is an ice layer on the surface of the insulating outer shell includes: After controlling the charging gun to vibrate for a preset duration based on preset vibration parameters, multiple ultrasonic detection devices evenly distributed on the inner wall of the charging gun storage slot are controlled to emit ultrasonic waves to the surface of the insulating shell at a preset frequency. After each of the ultrasonic detection devices receives the first echo, it is determined whether there is an ice layer on the surface of the insulating shell based on the acoustic characteristics of each first echo.

[0030] Specifically, when the system initiates the ice detection program, it first vibrates the charging gun via a built-in vibration control unit. The vibration control unit uses an electromagnetic drive principle, generating controllable mechanical vibration by controlling the on / off state and frequency of the electromagnetic coil. Preset vibration parameters include three key elements: vibration frequency, vibration amplitude, and vibration duration. The vibration frequency is set within a specific range to generate sufficient acceleration to remove loose material from the surface; the vibration amplitude is controlled at an appropriate level to avoid damage to the charging gun structure; and the vibration duration is dynamically adjusted according to ambient temperature and humidity conditions. The mechanical force generated during vibration acts on the surface of the insulating shell, causing weakly adhered non-ice materials such as snowflakes, water droplets, and dust to detach from the surface due to inertia, while firmly bonded ice remains attached due to its strong adhesion to the insulating shell.

[0031] After vibration is complete, the system activates an array of ultrasonic testing devices arranged on the inner wall of the charging gun receiving slot. These ultrasonic testing devices employ piezoelectric ceramic transducers, using the conversion between electrical and mechanical energy to transmit and receive ultrasonic waves. The ultrasonic testing devices are evenly distributed along the inner wall of the receiving slot, forming a multi-angle, multi-directional testing network to ensure comprehensive coverage of the insulating shell surface. Each ultrasonic testing device contains a transmitting unit and a receiving unit. The transmitting unit converts electrical signals into mechanical vibrations to generate ultrasonic waves, while the receiving unit converts the reflected mechanical vibrations back into electrical signals for analysis and processing.

[0032] The ultrasonic transmission process employs a pulse transmission mode, with each detection device synchronously emitting ultrasonic pulse signals according to a preset operating frequency. The ultrasonic pulses propagate towards the surface of the insulating shell in the form of spherical waves. When they encounter the surface of the insulating shell or an ice layer attached to the surface, reflection occurs due to the difference in acoustic impedance, forming the first echo signal returning to the detection device.

[0033] The reception and analysis of the first echo signal is the core step in ice layer determination. The receiving units of each ultrasonic testing device capture the returned first echo signal and convert it into a digital signal for processing. The system extracts multi-dimensional acoustic signature features from the first echo signal, including amplitude, spectral, phase, and time-domain features. Amplitude features reflect the acoustic impedance matching degree of the reflecting interface; the difference in acoustic impedance between the ice layer and the insulating material leads to changes in reflection intensity. Spectral features analyze the frequency component distribution of the echo signal using Fourier transform; different materials exhibit different reflection characteristics for different frequency components. Phase features analyze the phase change of the echo signal relative to the transmitted signal, reflecting the propagation delay characteristics of sound waves in different media. Time-domain features analyze the waveform shape and duration of the echo signal; echo waveforms generated by interfaces of different materials have specific time-domain characteristics.

[0034] The voiceprint recognition algorithm performs pattern matching and classification based on a pre-established feature database. The feature database contains standard voiceprint feature templates for both normal insulating shell surfaces and ice-covered surfaces, established through the collection and analysis of extensive experimental data. The algorithm calculates the similarity and matching degree between the detected first echo voiceprint features and the standard templates in the database. When the echo signal from any ultrasonic detection device displays ice-covered features, it is determined that ice exists on the surface of the insulating shell.

[0035] The beneficial effects of this embodiment are that vibration processing effectively eliminates interference from non-ice materials, improving the specificity and accuracy of the detection. The multi-point ultrasonic detection array enables omnidirectional monitoring of the insulating shell surface, avoiding blind spots and misjudgments that may occur with single-point detection. Multi-dimensional analysis of acoustic signature features provides rich judgment criteria, significantly improving the reliability and stability of ice layer identification. The entire detection process employs a non-contact measurement method, avoiding wear and damage to the charging gun that may be caused by mechanical contact. Simultaneously, the detection speed is fast and the response is timely, providing accurate decision-making basis for subsequent de-icing operations.

[0036] In some embodiments, obtaining the ice thickness distribution information and ice density distribution information on the surface of the insulating outer shell includes: For each of the ultrasonic testing devices, when there is an ice layer at the corresponding position of the ultrasonic testing device on the surface of the insulating shell, the ice layer density at the corresponding position of the ultrasonic testing device on the surface of the insulating shell is determined based on the acoustic signature characteristics of the first echo corresponding to the ultrasonic testing device; the ice layer density corresponding to each of the ultrasonic testing devices constitutes the ice layer density distribution information. For each of the ultrasonic testing devices, the ultrasonic propagation speed in the ice layer at the corresponding position of the ultrasonic testing device on the surface of the insulating shell is determined based on the ice layer density corresponding to the ultrasonic testing device. The ice layer thickness at the corresponding position of the ultrasonic testing device on the surface of the insulating shell is determined based on the ultrasonic propagation speed, the first moment when the ultrasonic testing device receives the first echo, and the second moment when the ultrasonic testing device receives the second echo. The ice layer thickness corresponding to each of the ultrasonic testing devices constitutes the ice layer thickness distribution information.

[0037] Specifically, the system first transmits ultrasonic pulses to the surface of the insulating shell through various ultrasonic detection devices. When the ultrasonic waves encounter the interface between the air and the ice layer, a first echo is generated. The system performs in-depth acoustic signature analysis on the first echo, a process involving several key steps: First, the amplitude characteristics of the first echo are extracted. Due to differences in acoustic impedance, ice layers of different densities cause significant variations in the amplitude of the reflected wave; denser ice layers typically produce stronger reflected signals. Second, the spectral characteristics are analyzed. The system performs frequency domain transformation on the first echo, extracting parameters such as the dominant frequency component, bandwidth, and spectral centroid. These parameters are closely related to the internal structure of the ice layer. Third, the phase characteristics are detected. By analyzing the phase relationship between the reflected and incident waves, the roughness and density of the ice layer surface can be inferred. Finally, the signal attenuation coefficient is calculated. By comparing the energy difference between the transmitted and received signals, the absorption characteristics of the ice layer for ultrasonic waves are evaluated.

[0038] The system's built-in database of ice layer acoustic characteristics covers the acoustic response characteristics of various ice layer densities. The system employs a pattern matching algorithm to compare the detected first echo acoustic signature with templates in the database, determining the best-matching density value by calculating the similarity. Each ultrasonic detection device independently measures the ice layer density in its corresponding area, obtaining ice layer density distribution information.

[0039] After obtaining the ice density at each detection point, the system calculates the ultrasonic wave propagation speed using the physical properties of ice. The system calculates the ultrasonic wave propagation speed within the ice layer of that density using a built-in physical model.

[0040] Subsequently, the system performs precise measurements of the ice thickness. Each ultrasonic detection device continuously monitors the reflected signals, accurately recording the first moment of the first echo and the second moment of the second echo. The first echo originates at the air-ice interface, and its arrival time reflects the propagation time of the ultrasonic wave in the air and its position on the ice surface. The second echo originates at the interface between the ice layer and the insulating shell, and its arrival time reflects the total propagation time of the ultrasonic wave after penetrating the entire ice layer. By calculating the time difference between the second and first moments, the system obtains the round-trip propagation time of the ultrasonic wave in the ice layer. Combining this with the known ultrasonic wave propagation speed, and using the fundamental physical relationship that distance equals speed multiplied by the time difference, the system calculates the ice thickness. Considering that the ultrasonic wave propagates round-trip in the ice layer, the system divides the calculated result by two to obtain the actual ice thickness. After each ultrasonic detection device completes the thickness measurement, the ice thickness distribution information is obtained.

[0041] This implementation method, by first determining the ice layer density, then calculating the propagation velocity, and finally measuring the thickness, solves the problem of measurement inaccuracy caused by the unknown sound velocity in traditional ultrasonic thickness measurement methods. Simultaneously, multi-point parallel measurement and intelligent data processing methods ensure the comprehensiveness and accuracy of the measurement results, providing a reliable data foundation for subsequent precise de-icing. The entire measurement process is highly automated, has a fast response speed, and can adapt to complex working conditions in extremely cold environments, significantly improving the methodological level and practicality of the charging gun anti-arc control system.

[0042] In some embodiments, removing the ice layer from the surface of the insulating outer casing based on the ice layer thickness distribution information and the ice layer density distribution information includes: If the ice density corresponding to each of the ultrasonic testing devices is less than the preset ice density, an instruction is issued to the user to wipe the surface of the insulating shell. For each of the ultrasonic testing devices, when the ice density corresponding to the ultrasonic testing device is greater than the preset ice density, the heating device at the corresponding position on the surface of the insulating shell of the ultrasonic testing device is determined as the target heating device, and the heating parameters corresponding to the target heating device are determined based on the ice density and ice thickness corresponding to the ultrasonic testing device. For each of the target heating devices, the target heating device is controlled to heat the surface of the insulating shell based on the heating parameters corresponding to the target heating device; After each of the target heating devices has finished heating the surface of the insulating shell, an instruction is issued to the user to wipe the surface of the insulating shell.

[0043] Specifically, the system first comprehensively analyzes the obtained ice density distribution information, checking the ice density value at each location of the ultrasonic testing device. The system has a built-in preset ice density threshold as a judgment standard, determined based on extensive experimental data, which effectively distinguishes between loose and dense ice layers. When the system finds that the ice density at each detection point is less than the preset ice density threshold, it determines that the ice layer on the entire insulating shell surface is a loose structure, characterized by weak adhesion and easy detachment. At this point, the system immediately issues a wiping instruction to the user through the charging pile's display screen, voice prompts, or a mobile application—a human-computer interaction interface. The instruction includes specific wiping methods, precautions, and safety reminders. After receiving the instruction, the user can gently wipe the surface of the insulating shell using a soft cloth, rubber scraper, or other tools. The loose ice layer can be detached under slight external force. The entire process requires no additional electricity, making it both environmentally friendly and efficient.

[0044] When the system detects that the ice density at certain locations exceeds a preset ice density threshold, it indicates that the ice structure in these areas is dense and firmly attached, making simple mechanical wiping ineffective. Heating is necessary to melt the ice. The system employs a precise spatial mapping method to establish a one-to-one correspondence between each ultrasonic detection device and its corresponding heating device on the surface of the insulating shell. Through a preset coordinate system and position algorithm, the system accurately identifies the specific area requiring heating and designates the corresponding heating device as the target heating device. This precise matching ensures that the heating area perfectly matches the area where dense ice is detected, avoiding unnecessary expansion of the heating range.

[0045] The system then enters the heating parameter calculation stage, which is the core of the entire de-icing process. The system incorporates a built-in thermodynamic calculation model that comprehensively considers multiple factors such as ice density, ice thickness, ambient temperature, and the properties of the insulating shell material. For each target heating device, the system performs personalized parameter calculations based on the ice density and thickness at its corresponding detection point. The process of determining the heating parameters includes: first, calculating the total heat required for melting, based on the ice's specific heat capacity, latent heat of melting, and the measured ice volume; second, determining the optimal heating power to ensure melting efficiency while avoiding overheating and damage to the insulating shell; third, calculating the heating time based on heat conduction theory and actual heat transfer efficiency; and finally, generating temperature control curves, including the temperature change patterns during the preheating, main heating, and heat preservation stages.

[0046] Once the heating parameters are determined, each target heating device begins executing its heating task according to the calculated parameters. The heating devices employ a distributed control strategy, with each device operating independently and without interference, achieving truly precise heating in designated areas. During the heating process, the system continuously monitors the operating status and temperature changes of each heating device, providing real-time feedback on the heating effect through temperature sensors. When the system detects that the ice layer has begun to melt, it adjusts the heating power appropriately to prevent overheating; when the temperature reaches the preset value, the system automatically enters a heat preservation mode to ensure complete melting of the ice layer while avoiding energy waste. The entire heating process uses closed-loop control, dynamically adjusting heating parameters based on real-time feedback to ensure optimal heating performance.

[0047] The heating and ultrasonic testing devices are meticulously designed in spatial layout, achieving a one-to-one correspondence. Each ultrasonic testing device is responsible for monitoring the ice condition in a specific area, while the corresponding heating device is responsible for heating that area. This design ensures a high degree of consistency between testing and heating accuracy, avoiding the efficiency losses caused by the mismatch between the testing and heating areas in traditional methods. The power and coverage of the heating devices are optimized to meet the melting requirements of the maximum ice thickness while achieving precise local heating control.

[0048] After each target heating device completes its heating task, the system confirms the heating effect through temperature monitoring and ice layer status detection. The system checks whether the temperature of the heated area has reached the preset value, whether the ice layer has completely melted, and whether there are any remaining solid ice particles. After confirming that heating is complete, the system issues a wiping command to the user again through the human-machine interface. The wiping at this time mainly aims to remove the melted water and any remaining ice residue. Since the ice layer has melted, the wiping process is relatively simple; the user only needs to gently wipe with a dry, soft cloth to complete the cleaning.

[0049] The core advantage of this embodiment lies in its intelligent judgment and differentiated processing strategy. The system can select the most suitable processing method based on the actual characteristics of the ice layer: energy-saving mechanical removal is used for loose ice layers, while precise heating and melting are employed for dense ice layers. This strategy not only ensures thorough de-icing but also optimizes energy consumption. Simultaneously, precise zoned control avoids the energy waste of traditional overall heating methods, reduces thermal stress on the insulating shell material, and extends the equipment's lifespan. The entire de-icing process is highly automated with moderate user involvement, ensuring both operational convenience and thorough de-icing, providing a strong methodological guarantee for the safe and reliable operation of the charging gun in extremely cold environments.

[0050] In some embodiments, when the surface humidity of the metal terminals of the charging gun plug is greater than a preset humidity, the surface of the metal terminals is dried using a preset drying method, including: The surface of the metal terminal is subjected to multi-point humidity detection based on a preset multi-point humidity detection method. When any humidity value of the multi-point humidity detection results is greater than the preset humidity value, the drying parameters corresponding to the hot air drying device on the inner wall of the charging gun storage slot are generated based on the current ambient temperature and the multi-point humidity detection results. Based on the drying parameters, the hot air drying device is controlled to dry the surface of the metal terminal until the humidity of the metal terminal surface is not greater than the preset humidity.

[0051] When the charging gun is placed in the charging gun storage slot, the hot air drying device is positioned opposite to the metal terminal of the charging gun plug.

[0052] Specifically, the system first starts a multi-point humidity detection program, controls the humidity sensor on the inner wall of the charging gun storage slot to move on the surface of the metal terminal with a preset running trajectory and step size, and records the mapping relationship between the first humidity value detected by the humidity sensor and the dwell position at each dwell position of the humidity sensor.

[0053] After the system completes multi-point humidity detection, it immediately analyzes and processes the results. The system compares the humidity value at each detection point with a preset humidity threshold. If the humidity value at any detection point exceeds the preset threshold, the system determines that there is a risk of moisture on the metal terminal surface and requires immediate initiation of a drying process. This stringent judgment standard ensures that even slight localized dampness can be detected and addressed promptly, preventing further deterioration of the humidity problem.

[0054] The system then enters the drying parameter generation stage, a crucial step in the entire drying process. The system first acquires the current ambient temperature data, monitoring temperature changes in real time using temperature sensors placed within the charging gun's storage compartment. The system then integrates the ambient temperature data with multi-point humidity detection results to establish a temperature-humidity correlation model. During parameter generation, the system pays special attention to special conditions in low-temperature environments. When the ambient temperature approaches or falls below the freezing point, the system activates an anti-icing protection mechanism. This mechanism ensures that while removing moisture, the metal terminal surfaces do not freeze due to excessive temperature gradients or uneven heating by adjusting the hot air temperature, changing the heating strategy, and extending the preheating time.

[0055] The calculation of drying parameters involves several key elements: First, the hot air temperature is determined. The system calculates the most suitable hot air temperature based on the ambient temperature and humidity level, ensuring drying efficiency while avoiding overheating that could damage the metal terminals or surrounding insulation materials. Second, the wind speed is set. The system calculates the optimal wind speed parameters based on the geometry and surface area of ​​the metal terminals to ensure that the hot air can evenly cover all areas that need to be dried. Third, the drying time is estimated. The system calculates the expected drying time based on the initial humidity level, the target humidity value, and the hot air parameters.

[0056] Based on the calculated drying parameters, the system begins controlling the hot air dryer to perform the drying task. The drying process employs a phased control strategy: in the preheating phase, the system starts at a lower temperature and airflow rate, gradually increasing the surface temperature of the metal terminals to avoid thermal shock; in the main drying phase, the system operates according to the calculated optimal parameters to achieve efficient moisture removal; in the heat preservation phase, the system maintains an appropriate temperature to ensure complete evaporation of residual moisture. Throughout the drying process, the system continuously monitors the changes in humidity readings at each detection point, evaluating the drying effect in real time.

[0057] The drying process employs a closed-loop control mechanism, with the system dynamically adjusting drying parameters based on real-time feedback from humidity detection. When the system detects a slow decrease in humidity in certain areas, it appropriately increases the hot air intensity in those areas; conversely, when it detects a rapid decrease in humidity, it appropriately reduces the heating power to prevent over-drying. This intelligent adjustment ensures both high efficiency and safety in the drying process.

[0058] The system has a clearly defined drying completion standard: when the humidity values ​​at all humidity detection points are no greater than the preset humidity threshold, and this state remains stable for a certain period of time, the system determines that the drying process is complete. At this point, the system automatically stops the operation of the hot air drying device and performs a final humidity confirmation check. If any detection points are found to have humidity exceeding the standard, the system will automatically restart the drying program until the standard of complete drying is achieved.

[0059] This implementation method achieves precise control of the surface humidity of metal terminals through multi-point detection, intelligent parameter generation, accurate control, and closed-loop feedback. In particular, the anti-icing protection mechanism in extremely cold environments effectively solves the problem of secondary icing that may occur with traditional drying methods under low-temperature conditions. The entire drying process is highly automated and has a fast response speed, ensuring that the charging gun's metal terminals maintain optimal dryness under various environmental conditions, providing crucial protection for a safe and reliable charging process. By eliminating moisture on the surface of the metal terminals, it effectively prevents safety hazards such as increased contact resistance and arc discharge caused by dampness, significantly improving the reliability and safety of the charging system in extremely cold environments.

[0060] In some embodiments, the multi-point humidity detection of the metal terminal surface based on a preset multi-point humidity detection method includes: The humidity sensor on the inner wall of the charging gun storage slot is controlled to move on the surface of the metal terminal according to a preset running trajectory and step size, and the mapping relationship between the first humidity value detected by the humidity sensor and the dwell position is recorded at each dwell position of the humidity sensor.

[0061] Specifically, the system uses a built-in drive mechanism to control the humidity sensor to move along a predefined trajectory on the surface of the metal terminal. At each stopping point, the humidity sensor stably collects data and stores the collected humidity values ​​along with their corresponding coordinates, forming a detailed humidity distribution map. This method can accurately reflect the humidity distribution on the surface of the metal terminal.

[0062] In some embodiments, controlling the hot air drying device to dry the surface of the metal terminal based on the drying parameters until the humidity of the metal terminal surface is not greater than the preset humidity includes: During the process of drying the surface of the metal terminal by controlling the hot air drying device based on the drying parameters, the humidity sensor is controlled to move on the surface of the metal terminal with a preset running trajectory and step size, and the mapping relationship between the second humidity value detected by the humidity sensor and the dwell position is recorded at each dwell position of the humidity sensor until the second humidity value corresponding to each dwell position is less than the preset humidity, and then the hot air drying device is controlled to stop operating.

[0063] Specifically, the system continuously monitors the surface humidity of the metal terminals during the drying process. It controls humidity sensors to move along a preset trajectory to collect humidity data from multiple points, updating the humidity distribution map in real time. The drying program dynamically adjusts the operating parameters of the hot air drying device, such as wind speed and temperature, based on the latest humidity information to ensure that the humidity quickly drops to a safe range. When the humidity values ​​at all monitoring points are below the preset threshold, the system automatically stops the hot air drying device to avoid over-drying, which could lead to energy waste and equipment damage. This closed-loop control strategy improves drying efficiency and safety, ensuring that the charging gun's metal terminals are used in optimal condition.

[0064] Please see Figure 2 , Figure 2 This is a schematic block diagram of the structure of the arc-prevention control system 100 for a charging gun provided in an embodiment of this application, as shown below. Figure 2 As shown, the anti-arc control system 100 for charging guns provided in this embodiment includes: The judgment module 110 is used to respond to the user's charging request and determine whether there is an ice layer on the surface of the insulating shell when the surface temperature of the insulating shell of the charging gun plug is lower than a preset temperature.

[0065] The acquisition module 120 is used to acquire the ice thickness distribution information and ice density distribution information on the surface of the insulating shell when there is ice on the surface of the insulating shell.

[0066] Ice removal module 130 is used to remove ice from the surface of the insulating shell based on the ice thickness distribution information and the ice density distribution information.

[0067] The drying module 140 is used to dry the surface of the metal terminal of the charging gun plug according to a preset drying method when the surface humidity is greater than a preset humidity.

[0068] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the system and its modules described above can be referred to in the aforementioned embodiments of the anti-arc control method for charging guns, and will not be repeated here.

[0069] The arc-prevention control system 100 for charging guns provided in the above embodiments can be implemented as a computer program, which can be used in, for example... Figure 3 The terminal device 200 shown is running on it.

[0070] Please see Figure 3 , Figure 3 The following is a schematic block diagram of the structure of a terminal device 200 provided in an embodiment of this application. The terminal device 200 includes a processor 201 and a memory 202, which are connected through a system bus 203. The memory 202 may include a non-volatile storage medium and internal memory.

[0071] The non-volatile storage medium can store a computer program. The computer program includes program instructions that, when executed by the processor 201, cause the processor 201 to perform any of the above-described arc-prevention control methods for charging guns.

[0072] The processor 201 provides computing and control capabilities to support the operation of the entire terminal device 200.

[0073] The internal memory provides an environment for the execution of computer programs in non-volatile storage media. When the computer program is executed by the processor 201, the processor 201 can execute any of the above-mentioned arc-prevention control methods for charging guns.

[0074] Those skilled in the art will understand that Figure 3 The structure shown in the figure is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the terminal device 200 involved in the present application. The specific terminal device 200 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0075] It should be understood that processor 201 can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0076] In some embodiments, the processor 201 is configured to run a computer program stored in memory to perform the following steps: In response to a user's charging request, when the surface temperature of the insulating shell of the charging gun plug is lower than a preset temperature, it is determined whether there is an ice layer on the surface of the insulating shell; If ice is present, obtain the ice thickness distribution information and ice density distribution information on the surface of the insulating shell; The ice layer on the surface of the insulating shell is removed based on the ice layer thickness distribution information and the ice layer density distribution information; When the surface humidity of the metal terminal of the charging gun plug is greater than the preset humidity, the surface of the metal terminal is dried according to the preset drying method.

[0077] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the terminal device 200 described above can be referred to the corresponding process of the aforementioned charging gun anti-arc control method, and will not be repeated here.

[0078] This application also provides a computer-readable storage medium storing a computer program that, when executed by one or more processors, causes the one or more processors to implement the arc-prevention control method for charging guns provided in this application.

[0079] The computer-readable storage medium can be an internal storage unit of the terminal device 200 in the aforementioned embodiments, such as a hard disk or memory of the terminal device 200. The computer-readable storage medium can also be an external storage device of the terminal device 200, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., provided with the terminal device 200.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the method disclosed in this application, and such modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for arc prevention control of a charging gun, characterized in that, include: In response to a user's charging request, when the surface temperature of the insulating shell of the charging gun plug is lower than a preset temperature, it is determined whether there is an ice layer on the surface of the insulating shell; If ice is present, obtain the ice thickness distribution information and ice density distribution information on the surface of the insulating shell; The ice layer on the surface of the insulating shell is removed based on the ice layer thickness distribution information and the ice layer density distribution information; When the surface humidity of the metal terminal of the charging gun plug is greater than the preset humidity, the surface of the metal terminal is dried according to the preset drying method.

2. The anti-arc control method for charging gun according to claim 1, characterized in that, The determination of whether there is an ice layer on the surface of the insulating shell includes: After controlling the charging gun to vibrate for a preset duration based on preset vibration parameters, multiple ultrasonic detection devices evenly distributed on the inner wall of the charging gun storage slot are controlled to emit ultrasonic waves to the surface of the insulating shell at a preset frequency. After each of the ultrasonic detection devices receives the first echo, it is determined whether there is an ice layer on the surface of the insulating shell based on the acoustic characteristics of each first echo.

3. The anti-arc control method for charging gun according to claim 2, characterized in that, The process of obtaining the ice thickness distribution information and ice density distribution information on the surface of the insulating shell includes: For each of the ultrasonic testing devices, when there is an ice layer at the corresponding position of the ultrasonic testing device on the surface of the insulating shell, the ice layer density at the corresponding position of the ultrasonic testing device on the surface of the insulating shell is determined based on the acoustic signature characteristics of the first echo corresponding to the ultrasonic testing device; the ice layer density corresponding to each of the ultrasonic testing devices constitutes the ice layer density distribution information. For each of the ultrasonic testing devices, the ultrasonic propagation speed in the ice layer at the corresponding position of the ultrasonic testing device on the surface of the insulating shell is determined based on the ice layer density corresponding to the ultrasonic testing device. The ice layer thickness at the corresponding position of the ultrasonic testing device on the surface of the insulating shell is determined based on the ultrasonic propagation speed, the first moment when the ultrasonic testing device receives the first echo, and the second moment when the ultrasonic testing device receives the second echo. The ice layer thickness corresponding to each of the ultrasonic testing devices constitutes the ice layer thickness distribution information.

4. The anti-arc control method for charging gun according to claim 3, characterized in that, The process of removing the ice layer from the surface of the insulating outer shell based on the ice layer thickness distribution information and the ice layer density distribution information includes: If the ice density corresponding to each of the ultrasonic testing devices is less than the preset ice density, an instruction is issued to the user to wipe the surface of the insulating shell. For each of the ultrasonic testing devices, when the ice density corresponding to the ultrasonic testing device is greater than the preset ice density, the heating device at the corresponding position on the surface of the insulating shell of the ultrasonic testing device is determined as the target heating device, and the heating parameters corresponding to the target heating device are determined based on the ice density and ice thickness corresponding to the ultrasonic testing device. For each of the target heating devices, the target heating device is controlled to heat the surface of the insulating shell based on the heating parameters corresponding to the target heating device; After each of the target heating devices has finished heating the surface of the insulating shell, an instruction is issued to the user to wipe the surface of the insulating shell.

5. The anti-arc control method for charging gun according to claim 1, characterized in that, When the surface humidity of the metal terminals of the charging gun plug is greater than a preset humidity, the surface of the metal terminals is dried according to a preset drying method, including: The surface of the metal terminal is subjected to multi-point humidity detection based on a preset multi-point humidity detection method. When any humidity value of the multi-point humidity detection results is greater than the preset humidity value, the drying parameters corresponding to the hot air drying device on the inner wall of the charging gun storage slot are generated based on the current ambient temperature and the multi-point humidity detection results. Based on the drying parameters, the hot air drying device is controlled to dry the surface of the metal terminal until the humidity of the metal terminal surface is not greater than the preset humidity.

6. The anti-arc control method for charging gun according to claim 5, characterized in that, The method for detecting humidity at multiple points on the surface of the metal terminal based on a preset multi-point humidity detection method includes: The humidity sensor on the inner wall of the charging gun storage slot is controlled to move on the surface of the metal terminal according to a preset running trajectory and step size, and the mapping relationship between the first humidity value detected by the humidity sensor and the dwell position is recorded at each dwell position of the humidity sensor.

7. The anti-arc control method for charging gun according to claim 6, characterized in that, The step of controlling the hot air drying device to dry the surface of the metal terminal based on the drying parameters until the humidity of the metal terminal surface is not greater than the preset humidity includes: During the process of drying the surface of the metal terminal by controlling the hot air drying device based on the drying parameters, the humidity sensor is controlled to move on the surface of the metal terminal with a preset running trajectory and step size, and the mapping relationship between the second humidity value detected by the humidity sensor and the dwell position is recorded at each dwell position of the humidity sensor until the second humidity value corresponding to each dwell position is less than the preset humidity, and then the hot air drying device is controlled to stop operating.

8. A charging gun anti-arc control system, characterized in that, include: The judgment module is used to respond to the user's charging request and determine whether there is an ice layer on the surface of the insulating shell when the surface temperature of the insulating shell of the charging gun plug is lower than a preset temperature. The acquisition module is used to acquire the ice thickness distribution information and ice density distribution information on the surface of the insulating shell when there is ice on the surface of the insulating shell. An ice removal module is used to remove ice from the surface of the insulating outer shell based on the ice thickness distribution information and the ice density distribution information. A drying module is used to dry the surface of the metal terminal of the charging gun plug according to a preset drying method when the surface humidity is greater than a preset humidity.

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