A charging pile detection device and a detection method thereof

Abstract

The application relates to the technical field of charging pile detection, in particular to a charging pile detection device and a detection method thereof, wherein the charging pile detection device comprises a tester, the front surface of the tester is provided with a touch control operation device, the lower portion of the touch control operation device is provided with a detection interface, the periphery of the detection interface is provided with an atomization humidification device, one end of the atomization humidification device is provided with an end cover, the side surface of the end cover is provided with a temperature and humidity sensor and a liquid mist concentration sensor, the inner side wall of the detection interface is provided with an insulation resistance sensor and a contact resistance sensor, the upper portion of the end cover is fixedly provided with a hollow liquid inlet seat, the liquid outlet end of the hollow liquid inlet seat is connected with the atomization humidification device, the liquid inlet end is fixedly connected with a pumping device, and the inside of the hollow liquid inlet seat is provided with an electric heating device; through the closed-loop control logic of the touch control operation device, the sensor and the execution component, the charging pile detection device can accurately simulate various working conditions for detection, has a wide adaptation range and high practicability.

Description

Technical Field

[0001] This invention relates to the field of charging pile testing technology, specifically to a charging pile testing device and its testing method. Background Technology

[0002] Charging pile testing equipment is a specialized instrument used to verify the electrical safety, performance parameters, and environmental adaptability of electric vehicle charging piles. It is a core tool to ensure charging safety and equipment compatibility. Among them, the portable AC charging pile tester is a commonly used on-site diagnostic tool for operation and maintenance personnel. This device adopts an integrated portable structure design and has built-in simulated load, signal detection module, and protocol parsing unit. Its core working principle is to replicate the electrical and communication logic of the entire electric vehicle charging process, so as to realize the rapid on-site verification of the compliance, functionality, and consistency of AC charging piles.

[0003] Chinese invention patent application number 202510008880.5 discloses an outdoor charging pile for new energy vehicles with a rain leakage detection function. A motor drives a disc at the bottom of the charging pile box. The disc is equipped with a simulated detection interface and a sealing ring replacement device. The function is switched by rotating the disc driven by the motor. At the same time, a spray mechanism is set at the charging gun interface to simulate the rainy environment and test the sealing performance of the charging gun sealing ring.

[0004] However, the above technical solutions have obvious shortcomings: First, the detection device and the charging pile are designed as an integrated unit, requiring each charging pile to be equipped with a complete set of detection components, resulting in high installation and maintenance costs; Second, the spraying equipment uses only a single spray nozzle, and even with the addition of a robotic arm to adjust the nozzle position, it is difficult to achieve multi-directional and multi-angle synchronous spraying, which has significant detection limitations; Third, it only simulates rain conditions and fails to take into account the impact of humid environments on the electrical performance of the charging plug.

[0005] Therefore, there is an urgent need to develop a portable charging pile performance testing device that can be adapted to multiple models of charging piles, and that offers low cost and multi-dimensional testing capabilities. Summary of the Invention

[0006] The main technical problem to be solved by the present invention is to provide a charging pile testing device and a testing method thereof. Through the closed-loop control logic of the touch operation device, sensor and execution component, the charging pile testing device can accurately simulate various working conditions for testing, with a wide range of adaptability and strong practicality.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A charging pile testing device includes a tester. A touch-screen operating device is located on the front of the tester, and a testing interface is located below the touch-screen operating device. A circular atomizing and humidifying device is located around the testing interface to spray liquid mist onto the testing interface to simulate a humid environment. An end cap is located at the end of the atomizing and humidifying device furthest from the tester. When installed together, the two form a testing cavity. A temperature and humidity sensor and a liquid mist concentration sensor are installed on the side of the end cap near the atomizing and humidifying device. Insulation resistance sensors and contact resistance sensors are evenly distributed circumferentially on the inner wall of the testing interface. A hollow liquid inlet seat is fixedly installed above the end cap. The liquid outlet of the hollow liquid inlet seat is connected to the atomizing and humidifying device, and a pumping device is fixedly connected to the liquid inlet end. An electric heating device is installed inside the hollow liquid inlet seat.

[0008] The following are further optimizations to this technical solution: The touch operation device includes a touch screen for human-machine interaction and a PLC controller for data transmission. The sensors, touch screen, pumping device and electric heating device are all connected to the PLC controller. The PLC controller receives instructions from the touch screen and data collected by each sensor, generates control instructions to adjust the pumping rate of the pumping device and the heating power of the electric heating device, and performs correlation processing on the collected data to generate correlation curves.

[0009] Further optimization: The atomizing humidification device includes an annular shell with a liquid inlet pipe at the top. The liquid inlet pipe and the shell are integrally formed and internally connected. Inside the shell, there is at least one annular atomizing unit. The atomizing unit includes a liquid delivery pipe and an atomizing nozzle. The liquid delivery pipe is fixedly connected to the inner wall of the shell. A liquid inlet is opened at a position corresponding to the liquid inlet pipe. The atomizing nozzle is installed on the side of the liquid delivery pipe away from the shell. Multiple atomizing nozzles are evenly spaced along the circumference of the liquid delivery pipe, and the liquid outlet of the atomizing nozzle faces the detection interface.

[0010] Further optimization: The liquid delivery pipe consists of two independent semi-ring pipes, with the top of the semi-ring pipe open and the bottom closed. The inside of the liquid inlet pipe is divided into two manifolds, and a V-shaped diverter is installed at the inlet to guide the liquid delivered by the pumping device into the two manifolds inside the liquid inlet pipe.

[0011] Further optimization: Mounting flanges are provided at both ends of the housing, and a sealing strip is installed on the flange face facing the tester. The housing and the tester are fixedly installed with bolts. After installation, the sealing strip is pressed against the outer surface of the tester to ensure a reliable seal at the connection between the two.

[0012] Further optimization: The end cap is a cylindrical shell with one open end. The end cap is divided into a main half shell and a secondary half shell. The joint surface of the two is a concave-convex positioning and fitting structure. After the joint is assembled, the open end faces the atomizing humidification device. The inner wall of the end cap is coated with a hydrophobic coating. A drain pipe is set near the bottom of the end cap to drain the liquid that condenses during the test. A fan interface is set on the side of the end cap to connect to an external blower to blow dry air into the test chamber after the test is completed.

[0013] Further optimization: The PLC controller has a preset multi-gradient humidity environment detection program. The multi-gradient humidity environment detection program supports manual setting of humidity, temperature and environmental stability duration for each environmental gradient, as well as standard threshold values ​​for electrical parameters under each environmental gradient, for detecting the environmental tolerance of the charging gun under test.

[0014] The present invention also provides a charging pile testing method, based on the charging pile testing equipment described above, comprising the following steps: S1. Insert the charging gun of the charging pile to be tested into the test interface, assemble the end cap and tighten the fixing bolts; install the pumping device and connect the external water source or salt spray solution storage container. S2. When the testing equipment is powered on, the PLC controller starts the equipment self-test program to perform a comprehensive test on each sensor and actuator. After confirming that each component is connected normally and is operating correctly, the subsequent testing process begins. S3. Set the target environmental parameters and start the detection program through the touch screen. The PLC controller receives the instructions and coordinates the operation of each sensor and actuator to adjust the environmental parameters in the detection chamber to the preset value. S4. The insulation resistance sensor and contact resistance sensor start working, respectively collecting insulation performance data and contact continuity performance data at the detection interface, and transmitting the data to the PLC controller. The PLC controller generates the change curves of contact resistance and insulation resistance according to the time series. S5. After the test is completed, the PLC controller controls all the actuators to stop working, generates and stores the test report, and starts the external blower to dry the liquid mist adhering to the inside of the test chamber and the surface of the charging gun. After drying, the end cover is removed, the charging gun is taken off, and the test process is completed.

[0015] Further optimization: The adjustment steps for detecting the internal environmental parameters of the cavity in step S3 are as follows: S301, PLC controller controls the start of electric heating device and pumping device. Pumping device starts to deliver liquid to atomizing and humidifying device. Atomizing and humidifying device starts atomizing function to spray liquid mist into detection chamber. S302, temperature and humidity sensor and liquid mist concentration sensor collect environmental parameters in real time and transmit them to PLC controller. PLC controller compares and analyzes the real-time environmental parameters with preset target parameters, and automatically adjusts the pumping rate of pumping device and the heating power of electric heating device to form dynamic closed-loop control. S303. After the environmental parameters reach the preset target value, the PLC controller controls the pumping device and the electric heating device to maintain the current operating parameters and continuously maintain the stability of the environment inside the detection chamber.

[0016] Further optimization: In step S3, the testing personnel set the humidity, temperature, and environmental stability duration for multiple environmental gradients, as well as the standard threshold for electrical parameters under each environmental gradient, through the touch screen; In step S4, while the PLC controller generates the change curves of contact resistance and insulation resistance according to the time series, it compares the collected electrical parameters with the preset standard thresholds. When an electrical parameter exceeds the preset standard threshold or the highest environmental gradient is detected in a loop, the testing stops.

[0017] The present invention, by adopting the above technical solution, has the following beneficial effects: The pumping device of this invention can be connected to different liquid sources according to the detection requirements to realize the spraying of clean water mist and salt mist of different concentrations, accurately simulating various working conditions such as normal humidity, coastal high salt mist, and industrial salt mist; when combined with an electric heating device, it can further simulate complex harsh environments such as high temperature and humidity and high temperature salt mist, comprehensively covering the needs of diverse detection scenarios and having stronger adaptability.

[0018] The detection device of the present invention can quickly create a uniformly diffused water mist environment in the detection chamber through a ring-shaped atomizing humidification device. Compared with the spray operation in the prior art, it can more accurately simulate the real working conditions of moisture intrusion and condensation formation in the outdoor environment, improve the authenticity of the test results, and effectively avoid the risk of short circuit caused by the introduction of a large amount of liquid, making the testing process safer and more controllable.

[0019] The closed-loop control of the temperature and humidity sensor, liquid mist concentration sensor and PLC controller of this invention can automatically adjust the pumping rate and heating power to maintain stable detection environment parameters and avoid detection deviations caused by environmental fluctuations. At the same time, the preset multi-gradient humid environment detection program can automatically complete multi-gradient environment switching, data acquisition and analysis without manual intervention, greatly reducing the labor intensity of detection personnel and improving detection efficiency.

[0020] This invention has a complete safety protection mechanism. When the liquid mist concentration exceeds the set threshold, the pumping device automatically stops and triggers an alarm mechanism. When the electrical parameters exceed the standard, the tolerance limit protection program is immediately activated to ensure the safety of the detection process.

[0021] The detection device of this invention can perform correlation processing on environmental parameters and electrical performance parameters to generate time series correlation curves, which intuitively reflect the changing trend of charging gun performance with the environment. After the test is completed, a test report is automatically generated and stored. It can not only meet the needs of daily operation and maintenance testing and fault diagnosis of charging piles, but also be applied to environmental tolerance testing in the enterprise R&D stage and product quality spot checks in the production stage, which is highly practical.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a perspective view of the overall structure of the detection device according to Embodiment 1 of the present invention; Figure 2 This is a perspective view of the detection device with the end cap removed according to Embodiment 1 of the present invention; Figure 3 This is a front view of the detection device with the end cap removed according to Embodiment 2 of the present invention; Figure 4 This is a three-dimensional representation of the atomizing humidification device and end cap according to Embodiment 1 of the present invention. Figure 1 ; Figure 5 This is a three-dimensional representation of the atomizing humidification device and end cap according to Embodiment 1 of the present invention. Figure 2 ; Figure 6 This is a front view of the atomizing humidification device and end cap according to Embodiment 1 of the present invention; Figure 7 This is a cross-sectional view of the atomizing humidification device and end cap according to Embodiment 1 of the present invention; Figure 8 This is a flowchart of the detection method according to Embodiment 1 of the present invention; Figure 9 This is a flowchart of the detection method in Embodiment 3 of the present invention.

[0024] In the diagram: 1. Tester; 2. Touch control device; 3. Detection interface; 4. Atomizing and humidifying device; 401. Housing; 402. Liquid inlet pipe; 403. Liquid delivery pipe; 404. Atomizing nozzle; 405. Connecting pipe; 5. End cap; 501. Main half-shell; 502. Secondary half-shell; 503. Drain pipe; 504. Fan interface; 6. Hollow liquid inlet seat; 7. Pumping device; 8. Electric heating device; 801. Copper sleeve; 802. Electric heating tube; 9. Sealing strip. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] Example 1: A charging pile testing device, such as Figure 1-3 As shown, it includes a tester 1, which is used to perform routine performance tests on the charging pile. This part is a common device in the prior art and will not be described in detail in this invention.

[0027] The tester 1 has a touch operation device 2 on the front, and a detection interface 3 is located below the touch operation device 2. A ring-shaped atomizing humidification device 4 is located around the detection interface 3 to spray liquid mist onto the detection interface 3 to simulate the charging conditions in a humid environment.

[0028] An end cap 5 is provided at the end of the atomizing humidification device 4 that is away from the tester 1. After the two are installed, they form a detection cavity, so that the charging gun is always surrounded by liquid mist during the detection process, ensuring the accuracy of the detection results.

[0029] A hollow liquid inlet seat 6 is fixedly installed above the end cap 5. The liquid outlet end of the hollow liquid inlet seat 6 is connected to the atomizing humidification device 4. A pumping device 7 is fixedly connected to the liquid inlet end. The pumping device 7 is signal-connected to the touch operation device 2. The pumping rate of the pumping device 7 can be adjusted through the touch operation device 2 to achieve precise control of the liquid mist spray concentration and spray volume of the atomizing humidification device 4.

[0030] In this embodiment, the pumping device 7 can be either a micro diaphragm speed-regulating pump or a micro gear speed-regulating pump. The pump's inlet end is connected to an external water source through a liquid guide pipe to deliver clean water to the atomizing humidification device 4. By adjusting the pumping rate, the function of spraying water mist of different humidity levels to the detection interface 3 can be realized, thereby simulating the electrical performance test of the charging plug under humid conditions.

[0031] In addition to this embodiment, the pumping device 7 can also use a small peristaltic speed-regulating pump adapted for salt spray detection, with an external salt spray solution storage container. Different concentrations of salt spray are sprayed onto the detection interface 3 through the atomizing humidification device 4, which can simulate harsh and humid conditions with different degrees of corrosion, such as coastal high salt spray and industrial salt spray, thus expanding the applicability of the device.

[0032] like Figure 2-4 and Figure 7 As shown, the atomizing humidification device 4 includes an annular housing 401, with a liquid inlet pipe 402 disposed above the housing 401. The liquid inlet pipe 402 and the housing 401 are integrally formed and internally connected. An annular atomizing unit is disposed inside the housing 401. The atomizing unit includes a liquid delivery pipe 403 and an atomizing nozzle 404. The liquid delivery pipe 403 is fixedly connected to the inner wall of the housing 401. The atomizing nozzle 404 is installed on the side of the liquid delivery pipe 403 away from the housing 401. Multiple atomizing nozzles 404 are evenly spaced along the circumference of the liquid delivery pipe 403.

[0033] A liquid inlet is provided at the position corresponding to the liquid inlet pipe 402 in the liquid delivery pipe 403. After the atomizing humidification device 4 is installed, the detection interface 3 is located at its center position, and the liquid outlet of the atomizing nozzle 404 faces the detection interface 3. When in use, the pumping device 7 delivers the liquid sequentially through the hollow liquid inlet seat 6 and the liquid inlet pipe 402 to the liquid delivery pipe 403. The liquid in the liquid delivery pipe 403 is atomized by the atomizing nozzle 404 and sprayed out, forming a humid liquid mist environment near the detection interface 3.

[0034] Furthermore, an electric heating device 8 is installed inside the hollow liquid inlet seat 6. The electric heating device 8 is connected to the touch operation device 2. The heating power of the electric heating device 8 can be adjusted through the touch operation device 2 to heat the liquid to the required temperature to simulate a high-temperature and humid environment for testing.

[0035] The electric heating device 8 includes a copper sleeve 801 fixedly installed inside the hollow liquid inlet seat 6 and an electric heating tube 802 installed inside the copper sleeve 801. When the electric heating tube 802 is energized, the copper sleeve 801 heats up, thereby uniformly and efficiently heating the liquid inside the hollow liquid inlet seat 6. If it is necessary to heat the salt spray solution, a polytetrafluoroethylene anti-corrosion layer can be coated on the outside of the copper sleeve 801, which can effectively resist the corrosive effect of chloride ions in the salt spray solution and ensure high heat conduction efficiency, thus meeting the simulation detection requirements of high temperature salt spray humid environment.

[0036] In order to make the liquid mist distribution inside the detection chamber more uniform, multiple atomizing units can be arranged along the axial direction of the housing 401. The liquid delivery pipe 403 of one atomizing unit is connected to the liquid inlet pipe 402, and the liquid delivery pipes 403 of the other adjacent atomizing units are connected by connecting pipes 405, so that the liquid delivered by the pumping device 7 can be delivered to each atomizing unit.

[0037] The housing 401 has mounting flanges at both ends. A sealing strip 9 is installed on the flange facing the tester 1. The housing 401 and the tester 1 are fixedly installed by bolts. After installation, the sealing strip 9 is pressed against the outer surface of the tester 1 to ensure a reliable seal at the connection between the two.

[0038] In this embodiment, the sealing strip 9 is made of silicone, which has good temperature adaptability and water vapor corrosion resistance, and low compression set, so it can still maintain a good sealing effect after long-term compression. In other embodiments, if the pumping device 7 is conveying a salt spray solution, the sealing strip 9 can be replaced with fluororubber, which has better chemical corrosion resistance and can ensure a reliable seal even in harsh corrosive environments.

[0039] like Figure 5-6As shown, the end cap 5 is a cylindrical shell with one open end facing the atomizing humidification device 4. An annular protrusion is provided on the flange surface of the shell 401 away from the tester 1. A stop is provided at the corresponding position on the end cap 5. The annular protrusion and the stop are tightly fitted together. A cable avoidance opening is provided at the bottom of the end cap 5. A protective rubber strip is installed on the cable avoidance opening to prevent the cable protection layer from being cut at the cable avoidance opening.

[0040] The inner wall of the end cap 5 is coated with a hydrophobic coating made of polytetrafluoroethylene, which has excellent hydrophobic properties and can prevent liquid mist inside the detection chamber from condensing and adhering to the inner wall of the end cap 5. A drain pipe 503 is provided near the bottom of the end cap 5 to drain the liquid condensed during the detection process and prevent water accumulation from causing electrical short circuits. A fan interface 504 is provided on the side of the end cap 5, which is connected to an external blower to blow dry air into the detection chamber after the detection is completed, drying the liquid adhering to the surface of the charging gun under test, facilitating subsequent cleaning and repositioning operations.

[0041] For ease of installation, the end cover 5 is divided into a main half-shell 501 and a secondary half-shell 502, which are respectively located on the left and right sides of the detection interface 3. The mating surfaces of the two are a concave-convex positioning fit structure. Specifically, the main half-shell 501 is provided with a positioning boss at the mating point, and correspondingly, the secondary half-shell 502 is provided with a positioning groove at the mating point. During assembly, the positioning boss is embedded in the positioning groove to ensure the coaxiality and sealing of the main half-shell 501 and the secondary half-shell 502 after assembly.

[0042] After the charging gun to be tested is inserted into the test interface 3, the secondary half shell 502 is first installed on the housing 401 of the atomizing humidification device 4 and pre-fixed with bolts. Then the main half shell 501 is assembled to ensure that the positioning boss at the joint of the two is fully embedded in the positioning groove. Finally, the bolts between the end cover 5 and the housing 401 are tightened and fixed.

[0043] The touch operation device 2 includes a touch display screen and a PLC controller. The touch display screen is used to realize human-machine interaction, and the PLC controller is used to realize data transmission between the touch display screen and various execution components. In this embodiment, the PLC controller is selected from the Siemens S7-1200 series, and the touch display screen is selected from the matching Siemens Smart Line series. The communication latency is low and the data transmission is stable, which is suitable for application scenarios where the detection equipment has high requirements for real-time data feedback.

[0044] In addition to this embodiment, the PLC controller and touch screen can also be selected from existing mature supporting products, which can be purchased from the market according to the usage requirements, and will not be described in detail in this invention.

[0045] A temperature and humidity sensor and a liquid mist concentration sensor are installed on the side of the end cap 5 near the atomizing humidification device 4, respectively, to collect environmental data such as temperature, humidity and liquid mist concentration inside the detection chamber; an insulation resistance sensor and a contact resistance sensor are evenly distributed around the inner sidewall of the detection interface 3, wherein the insulation resistance sensor is fitted to the insulating bushing of the detection interface 3, and the contact resistance sensor is installed at the contact point between the charging gun plug and the detection interface 3, to collect electrical performance data such as insulation performance data and contact conductivity data at the detection interface 3.

[0046] All the sensors mentioned above are connected to the PLC controller to transmit the collected data. The PLC controller is also connected to the pumping device 7 and the electric heating device 8. The testing personnel issue test parameter commands through the touch screen. The PLC controller combines the test parameter commands with the data collected by the temperature and humidity sensors to generate action commands, which control the pumping device 7 and the electric heating device 8 to adjust the relevant parameters, thereby achieving the regulation of the temperature and humidity inside the testing chamber.

[0047] Specifically, the testing personnel set the testing parameters on the touch screen according to the actual needs. The temperature and humidity sensors and the liquid mist concentration sensor collect the temperature, relative humidity, and liquid mist concentration data inside the cavity in real time and transmit the data to the PLC controller. The PLC controller has a built-in data processing module that compares the real-time collected environmental parameters with the target parameters preset by the testing personnel and generates corresponding action instructions. When the real-time detected humidity is lower than the preset target humidity, the PLC controller immediately sends an acceleration signal to the pumping device 7 to increase the pumping rate and thus increase the amount of liquid mist sprayed by the atomizing humidifier 4. Conversely, when the real-time detected humidity is higher than the target humidity, the PLC controller sends a deceleration signal to reduce the pumping rate and decrease the amount of liquid mist sprayed. When the detected liquid mist concentration exceeds the preset threshold, the PLC controller simultaneously sends a pump stop signal and an alarm signal. On the one hand, it stops the liquid mist spraying of the atomizing humidifier 4 to avoid excessive concentration affecting the detection accuracy or causing safety hazards. On the other hand, it displays an abnormality on the touch screen to remind the testing personnel to handle it in time. In addition, when a high temperature and humidity environment needs to be simulated during the detection process, the PLC controller controls the electric heating device 8 to start and automatically adjusts the heating power of the electric heating device 8 according to the real-time temperature feedback from the temperature and humidity sensor, so as to heat the liquid entering the atomizing humidification device 4 to the preset temperature and ensure that the temperature in the detection chamber is maintained within the target temperature range. During the testing process, the PLC controller correlates the environmental data and electrical performance data collected by each sensor and generates correlation curves according to the time series (e.g., humidity-insulation resistance correlation curve, humidity-contact resistance correlation curve, etc.). The testing personnel can select the correlation curve type and time period to view it through the touch screen.

[0048] This invention also provides a charging pile testing method, which is executed based on the aforementioned charging pile testing equipment, such as... Figure 8 As shown, the specific steps include: S1. The testing personnel insert the charging gun of the charging pile to be tested into the testing interface 3, assemble the main half shell 501 and the auxiliary half shell 502 and tighten the fixing bolts; install the pumping device 7 and connect the external water source or salt spray solution storage container. During assembly, the main half-shell 501 and the secondary half-shell 502 are placed on the left and right sides of the detection interface 3 respectively, so that the positioning bosses on the mating surfaces of the two are precisely matched with the positioning grooves to ensure the sealing of the mating joint.

[0049] S2. When the testing equipment is powered on, the PLC controller starts the equipment self-test program to perform a comprehensive test on each sensing component and actuator. After confirming that each component is connected normally and operating without error, the subsequent testing process begins.

[0050] S3. The testing personnel set the target environmental parameters through the touch screen according to the testing scenario requirements. After the parameters are set, the testing program is started. The PLC controller receives the instructions and coordinates the actions of each sensing component and execution component to adjust the environmental parameters in the testing chamber to the preset value. The steps for regulating the parameters of the internal environment of the cavity in step S3 above are as follows: S301, the PLC controller controls the electric heating device 8 to start, and at the same time controls the pumping device 7 to start, so as to deliver the liquid to the atomizing and humidifying device 4. The atomizing and humidifying device 4 starts the atomizing function and sprays liquid mist into the detection chamber. S302, temperature and humidity sensor and liquid mist concentration sensor collect environmental parameters in real time and transmit them to PLC controller. PLC controller compares and analyzes the real-time environmental parameters with preset target parameters, and automatically adjusts the pumping rate of pumping device 7 and the heating power of electric heating device 8 to form dynamic closed-loop control. S303. After the environmental parameters reach the preset target value, the PLC controller controls the pumping device 7 and the electric heating device 8 to maintain the current operating parameters, continuously maintain the stability of the environment inside the detection chamber, and avoid deviation of the detection data due to environmental fluctuations.

[0051] S4. The insulation resistance sensor and contact resistance sensor start working, respectively collecting insulation performance data and contact continuity performance data at detection interface 3, and transmitting the data to the PLC controller. The PLC controller generates change curves of contact resistance and insulation resistance according to the time series, which are used to evaluate the stability of contact resistance and the change of insulation performance under this environment.

[0052] S5. After the test is completed, the PLC controller sends a stop command to control all actuators to stop working. At the same time, a test report is generated, displayed on the touch screen and automatically stored for easy traceability and review later. The external blower is activated to blow dry air into the test chamber to dry the liquid mist adhering to the inside of the test chamber and the surface of the charging gun. After drying, the end cover 5 is removed, the charging gun is taken out, and the test process is completed.

[0053] It should be noted that the test report generated in step S5 specifically includes real-time environmental parameters, correlation curves between environmental parameters and electrical performance parameters, and the final test conclusion. Test personnel can freely select and view the report content through the touch screen.

[0054] Example 2: Based on the charging pile testing equipment described in Example 1, the difference between Example 2 and Example 1 is that the liquid delivery pipe 403 consists of two independent semi-ring pipes with an open top and a closed bottom. That is, the cavities of the two semi-ring pipes are independent and not connected. Correspondingly, the liquid inlet pipe 402 is divided into two manifolds and a V-shaped diverter is provided at the inlet. The liquid delivered by the pumping device 7 is guided by the diverter and enters the two manifolds inside the liquid inlet pipe 402, and then is delivered to the two semi-ring pipes respectively, so that the liquid in the liquid delivery pipe 403 is evenly distributed.

[0055] Example 3: Based on the charging pile testing equipment described in Example 1 above, the difference between Example 3 and Example 1 is that the PLC controller has a preset multi-gradient humidity environment detection program, which is used to detect the environmental tolerance of the charging gun under test.

[0056] The multi-gradient humid environment testing program supports manual setting of humidity, temperature, and environmental stability duration for each environmental gradient, as well as standard threshold values ​​for electrical parameters under each environmental gradient. Once preset, the testing program is started, which can record the changing trends of electrical performance parameters with environmental conditions and test the environmental tolerance limits of electrical components. The entire testing process is automatically controlled by a PLC controller without manual intervention, reducing the workload of testing personnel and improving testing efficiency.

[0057] After the detection program is started, the equipment adjusts the environmental parameters (temperature and humidity) in the detection chamber to the initial gradient according to steps S301-S303. After maintaining the gradient stably for a preset time, the insulation resistance sensor and the contact resistance sensor synchronously collect electrical data. The PLC controller generates the change curves of contact resistance and insulation resistance according to the time series, which are used to evaluate the stability of contact resistance and the change of insulation performance under the environmental gradient. After the initial environmental gradient detection is completed, the system automatically adjusts the environmental parameters to the next gradient and repeats the detection according to the above process.

[0058] When any electrical parameter exceeds the preset standard threshold, the system immediately triggers the tolerance limit protection program: the PLC controller sends a signal to control the pumping device 7 to stop pumping, the electric heating device 8 to cut off power, and issues an alarm signal; the current critical environmental parameters and corresponding electrical parameters are recorded for easy reference by subsequent testing personnel.

[0059] If the tolerance limit protection procedure is not triggered during the test, the system continues to test until the highest environmental gradient is reached. The entire process runs automatically, accurately simulating different environmental gradients, avoiding errors that may be caused by manual operation, ensuring the consistency and accuracy of each test condition, while greatly shortening the test cycle and significantly improving test efficiency and reliability.

[0060] like Figure 9 As shown, the detection method of the charging pile testing equipment described in Embodiment 3 differs from that in Embodiment 1 in that: In step S3, the testing personnel set the humidity, temperature, and environmental stability duration for multiple environmental gradients, as well as the standard threshold values ​​for electrical parameters under each environmental gradient, through a touch screen display.

[0061] In step S4, while the PLC controller generates the change curves of contact resistance and insulation resistance according to the time series, it compares the collected electrical parameters with the preset standard threshold. When a certain electrical parameter exceeds the preset standard threshold, the system immediately triggers the tolerance limit protection program. Otherwise, the PLC controller adjusts the environmental parameters in the detection chamber to the next gradient and performs cyclic detection until the highest environmental gradient.

[0062] In step S5, the generated test report also includes environmental parameters and corresponding electrical parameters at the time of test cessation, which are used to evaluate the environmental tolerance limit of the charging gun.

[0063] In addition to being used for routine maintenance and troubleshooting of charging piles, this charging pile testing equipment can also play a significant role in the research and development and production stages of enterprises. On the one hand, it can simulate various extreme humid environments during the research and development stage to conduct comprehensive environmental tolerance tests on newly developed charging guns, providing data support for product optimization design. On the other hand, it can conduct random inspections of products during the production process to ensure that product quality meets standard requirements, while also promptly identifying problems in the production process, adjusting production processes, and improving product yield.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A charging pile testing device, comprising a tester (1), a touch operation device (2) on the front of the tester (1), a testing interface (3) below the touch operation device (2), and an annular atomizing humidifying device (4) around the testing interface (3) for spraying liquid mist onto the testing interface (3) to simulate a humid environment, wherein an end cap (5) is provided at the end of the atomizing humidifying device (4) away from the tester (1), and the two are installed to form a testing cavity, characterized in that: A temperature and humidity sensor and a liquid mist concentration sensor are installed on the side of the end cap (5) near the atomizing humidification device (4). An insulation resistance sensor and a contact resistance sensor are evenly distributed on the inner side wall of the detection interface (3). A hollow liquid inlet seat (6) is fixedly installed on the top of the end cap (5). The liquid outlet of the hollow liquid inlet seat (6) is connected to the atomizing humidification device (4). A pumping device (7) is fixedly connected to the liquid inlet end. An electric heating device (8) is installed inside the hollow liquid inlet seat (6).

2. The charging pile testing equipment according to claim 1, characterized in that: The touch operation device (2) includes a touch screen for human-machine interaction and a PLC controller for data transmission. The sensor, touch screen, pumping device (7) and electric heating device (8) are all connected to the PLC controller. The PLC controller receives the instructions sent by the touch screen and the data collected by each sensor, generates control instructions to adjust the pumping rate of the pumping device (7) and the heating power of the electric heating device (8), and performs correlation processing on the collected data to generate correlation curves.

3. The charging pile testing equipment according to claim 2, characterized in that: The atomizing humidification device (4) includes an annular shell (401), with an inlet pipe (402) above the shell (401). The inlet pipe (402) and the shell (401) are integrally formed and internally connected. At least one annular atomizing unit is provided inside the shell (401). The atomizing unit includes a liquid delivery pipe (403) and an atomizing nozzle (404). The liquid delivery pipe (403) is fixedly connected to the inner wall of the shell (401). An inlet is provided at the position corresponding to the liquid delivery pipe (403) and the inlet pipe (402). The atomizing nozzle (404) is installed on the side of the liquid delivery pipe (403) away from the shell (401). Multiple atomizing nozzles (404) are evenly spaced along the circumference of the liquid delivery pipe (403). The outlet of the atomizing nozzle (404) faces the detection interface (3).

4. The charging pile testing device according to claim 3, characterized in that: The liquid delivery pipe (403) consists of two independent semi-ring pipes with an open top and a closed bottom. The liquid inlet pipe (402) is divided into two manifolds and a V-shaped diverter is provided at the inlet to guide the liquid delivered by the pumping device (7) into the two manifolds inside the liquid inlet pipe (402).

5. A charging pile testing device according to claim 3 or 4, characterized in that: The housing (401) is provided with mounting flanges at both ends. A sealing strip (9) is installed on the flange face facing the tester (1). The housing (401) and the tester (1) are fixedly installed by bolts. After installation, the sealing strip (9) is pressed on the outer shell of the tester (1) to ensure reliable sealing at the connection between the two.

6. The charging pile testing device according to claim 5, characterized in that: The end cap (5) is a cylindrical shell with one open end. The end cap (5) is divided into a main half shell (501) and a secondary half shell (502). The two are joined together by a concave-convex positioning and fitting structure. After joining, the open end faces the atomizing humidification device (4). The inner wall of the end cap (5) is coated with a hydrophobic coating. A drain pipe (503) is provided near the bottom of the end cap (5) to drain the liquid condensed during the detection process. A fan interface (504) is provided on the side of the end cap (5) to connect to an external blower device to blow dry air into the detection chamber after the detection is completed.

7. The charging pile testing device according to claim 6, characterized in that: The PLC controller has a pre-set multi-gradient humidity environment detection program. The multi-gradient humidity environment detection program supports manual setting of humidity, temperature and environmental stability duration for each environmental gradient, as well as standard threshold values ​​for electrical parameters under each environmental gradient, for detecting the environmental tolerance of the charging gun under test.

8. A charging pile testing method, based on the charging pile testing equipment according to claim 7, characterized in that: Includes the following steps: S1. Insert the charging gun of the charging pile to be tested into the test interface (3), assemble the end cap (5) and tighten the fixing bolts; install the pumping device (7) and connect the external water source or salt spray solution storage container. S2. When the testing equipment is powered on, the PLC controller starts the equipment self-test program to perform a comprehensive test on the sensors and actuators. After confirming that all components are connected normally and operating without error, the subsequent testing process begins. S3. Set the target environmental parameters and start the detection program through the touch screen. The PLC controller receives the instruction and coordinates the operation of each sensor, pumping device (7) and electric heating device (8) to adjust the environmental parameters in the detection chamber to the preset value. S4. The insulation resistance sensor and the contact resistance sensor start working, respectively collecting insulation performance data and contact continuity performance data at the detection interface (3), and transmitting the data to the PLC controller. The PLC controller generates the change curves of contact resistance and insulation resistance according to the time sequence. S5. After the test is completed, the PLC controller controls all the execution components to stop working, generates and stores the test report, and starts the external blower to dry the liquid mist attached to the inside of the test chamber and the surface of the charging gun. After drying, remove the end cover (5), take off the charging gun, and complete the test process.

9. A charging pile testing method according to claim 8, characterized in that: The steps for regulating the parameters of the internal environment of the cavity in step S3 are as follows: S301, PLC controller controls the electric heating device (8) and pumping device (7) to start, the pumping device (7) delivers the liquid to the atomizing humidifying device (4), the atomizing humidifying device (4) starts the atomizing function and sprays liquid mist into the detection chamber; S302, temperature and humidity sensor and liquid mist concentration sensor collect environmental parameters in real time and transmit them to PLC controller. PLC controller compares and analyzes the real-time environmental parameters with preset target parameters, and automatically adjusts the pumping rate of pumping device (7) and heating power of electric heating device (8) to form dynamic closed-loop control. S303. After the environmental parameters reach the preset target value, the PLC controller controls the pumping device (7) and the electric heating device (8) to maintain the current operating parameters and continuously maintain the stability of the environment inside the detection chamber.

10. A charging pile testing method according to claim 9, characterized in that: In step S3, the testing personnel set the humidity, temperature, and environmental stability duration for multiple environmental gradients, as well as the standard threshold values ​​for electrical parameters under each environmental gradient, through a touch screen display. In step S4, while the PLC controller generates the change curves of contact resistance and insulation resistance according to the time series, it compares the collected electrical parameters with the preset standard threshold. When a certain electrical parameter exceeds the preset standard threshold or the highest environmental gradient is detected in the loop, the detection stops.

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