Photovoltaic junction box diode characteristic detection device

Abstract

The present invention relates to a photovoltaic junction box diode characteristic detection device, comprising a photovoltaic junction box detection platform, comprising at least one detection station for positioning the photovoltaic junction box, and each detection station is provided with a sensor; a gantry bracket, erected on the photovoltaic junction box detection platform, the gantry bracket comprises a horizontally arranged slide rail, a corresponding number of lifting cylinders are provided on the slide rail corresponding to the number of detection stations, and a test probe is fixed at the bottom of the lifting cylinder; a detection controller, electrically connected to the lifting cylinder and the sensor, when detecting, the photovoltaic junction box is electrically connected to the detection controller, the sensor senses that the photovoltaic junction box is inserted, the sensor feeds back to the detection controller, the detection controller controls the lifting cylinder to descend until the test probe contacts the diode test point in the photovoltaic junction box, and the photovoltaic junction box feeds back the detection result to the detection controller. The detection efficiency and qualified rate are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of diode detection, and in particular to a photovoltaic junction box diode characteristic detection device. Background Art

[0002] At present, the traditional method for testing diodes in photovoltaic junction boxes is to test each diode in the photovoltaic junction box one by one through an oscilloscope and a multimeter, observe the changes in the waveform through the oscilloscope, and manually judge whether the diode is qualified, and then judge whether the photovoltaic junction box is qualified. This test method has quite a few disadvantages: first, this test method is inefficient and cannot test all diodes in a photovoltaic junction box at the same time; second, the judgment error is high, and there are many human factors through manual judgment, and the qualified rate of the product is controlled by human factors; third, this test method may cause the phenomenon of missed detection of diodes, and it is not convenient to check the data later, which causes certain difficulties for the rework of the product, and the traditional test method cannot test the male and female line resistance. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a photovoltaic junction box diode characteristic detection device which greatly improves the detection efficiency and the qualified rate in view of the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a photovoltaic junction box diode characteristic detection device, characterized in that it includes

[0005] A photovoltaic junction box detection station includes at least one detection station for locating the photovoltaic junction box, and each detection station is provided with a sensor for sensing the insertion of the photovoltaic junction box;

[0006] A gantry bracket is erected on the photovoltaic junction box inspection platform, the gantry bracket includes a horizontally arranged slide rail, a corresponding number of lifting cylinders are arranged on the slide rail corresponding to the number of inspection stations, a test probe is fixed at the bottom of the lifting cylinder, and the test probe is arranged to match the distribution of the diode test points in the photovoltaic junction box;

[0007] The detection controller is electrically connected to the lifting cylinder and the sensor. During detection, the photovoltaic junction box is electrically connected to the detection controller. The sensor senses that the photovoltaic junction box has been inserted, and the sensor feeds back to the detection controller. The detection controller controls the lifting cylinder to descend until the test probe contacts the diode test point in the photovoltaic junction box. The detection time is controlled by the detection controller, and the photovoltaic junction box feeds back the detection result to the detection controller.

[0008] Furthermore, each inspection station is provided with a limiting groove for limiting the photovoltaic junction box and an adsorption tool for firmly adsorbing the photovoltaic junction box in the limiting groove, and one end of the limiting groove is open for inserting the photovoltaic junction box.

[0009] Furthermore, the lifting cylinder can move laterally on the slide rail, and the position of the lifting cylinder relative to the detection station can be adjusted by an external debugging cylinder before the photovoltaic junction box is tested.

[0010] Furthermore, the detection controller is provided with a human-machine interaction interface, which includes control buttons, a display screen for displaying detection data of the photovoltaic junction box, and an alarm for warning that the photovoltaic junction box is unqualified and the entire device is faulty.

[0011] Furthermore, the photovoltaic junction box inspection station is also provided with a laser engraving machine and / or a barcode scanner. The laser engraving machine is electrically connected to the inspection controller and is used to automatically engrave a code on the photovoltaic junction box after the photovoltaic junction box has passed the inspection; the barcode scanner is electrically connected to the inspection controller and is used to automatically scan the product barcode of the photovoltaic junction box after the photovoltaic junction box has passed the inspection.

[0012] Furthermore, the detection controller controls the detection of characteristics of each diode in the photovoltaic junction box including forward voltage drop, reverse leakage, reverse voltage drop and positive and negative line resistance. The detection controller is preset with preset values ​​of sampling data of the diodes in the photovoltaic junction box under normal conditions.

[0013] Furthermore, the detection controller also has a network communication interface and a memory card, which transmits the real-time detection data to the computer through an external computer device, saves the data through the computer device and performs data review and printing operations, and realizes automatic data storage through the memory card.

[0014] Furthermore, the detection controller controls the detection stations to perform detection in sequence according to the insertion order fed back by the sensor.

[0015] Furthermore, the device can also be used to detect the characteristics of a single diode.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the photovoltaic junction box diode characteristic detection device can test the diodes, male and female line resistances, and diode incoming inspection in the solar photovoltaic junction box; each junction box completes the test at one time, and all test results are displayed digitally at the same time; when the measured data does not meet the set requirements, it has visual and auditory alarm devices, which not only maintains the requirements for testing the diodes in the junction box, but also meets the quality inspection requirements of a single diode, effectively avoids missing the diode, and can also determine whether the male and female heads of the junction box are short-core, riveted reliably, or installed upside down by testing the male and female line resistance. The operation is simple, the test data is reliable, it can effectively identify whether the product is qualified, and can meet customer needs through the expansion of external functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of a photovoltaic junction box detection platform in a photovoltaic junction box diode characteristic detection device according to this embodiment.

[0018] Figure 2 The figure is a schematic diagram of the structure of a photovoltaic junction box diode characteristic detection device according to the present embodiment. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, a photovoltaic junction box diode characteristic detection device includes:

[0021] The photovoltaic junction box detection station 100 includes at least one detection station 110 for locating the photovoltaic junction box, and each detection station 110 is provided with a sensor 120 for sensing the insertion of the photovoltaic junction box. In this embodiment, two detection stations 110 are provided on the photovoltaic junction box detection station 100 for simplicity and speed of the device;

[0022] The gantry support 200 is erected on the photovoltaic junction box test bench 100. The gantry support 200 includes a horizontally arranged slide rail 210. The slide rail 210 is provided with a corresponding number of lifting cylinders 300 corresponding to the number of the testing stations 110. The bottom of the lifting cylinder 300 is fixed with a test probe 400. The test probe 400 is arranged to match the distribution of the diode test points in the photovoltaic junction box.

[0023] The detection controller 500 is electrically connected to the lifting cylinder 300 and the sensor 120. During detection, the photovoltaic junction box is electrically connected to the detection controller 500, and the sensor 120 senses that the photovoltaic junction box has been inserted. The sensor 120 feeds back to the detection controller 500, and the detection controller 500 controls the lifting cylinder 300 to descend until the test probe 400 contacts the diode test point in the photovoltaic junction box. The detection time is controlled by the detection controller 500, and the photovoltaic junction box feeds back the detection result to the detection controller 500.

[0024] In this embodiment, a test probe 400 is configured corresponding to three groups of diodes in a photovoltaic junction box, and the position of the diode test point is the copper sheet of the diode. The test probe 400 contacts the copper sheet under the action of the lifting cylinder 300, which can effectively find photovoltaic junction boxes with poor connection between the diode and the copper sheet, and can complete the test of three groups of diodes at the same time, effectively avoiding missed detection of the diode.

[0025] Preferably, each inspection station 110 is provided with a limiting groove for limiting the photovoltaic junction box and an adsorption tool 130 for firmly adsorbing the photovoltaic junction box in the limiting groove. One end of the limiting groove is open for inserting the photovoltaic junction box. In this embodiment, the limiting groove is surrounded by three blocks 111 vertically disposed on the photovoltaic junction box inspection platform on three sides of the limiting groove. The adsorption tool 130 is disposed on a block 111 opposite to the opening. The adsorption tool 130 uses a pneumatic tool (omitted in the figure) to perform a one-time adsorption operation on the photovoltaic junction box inserted into the opening, thereby preventing the photovoltaic junction box from being placed in the wrong place due to autonomous placement, thereby avoiding the problem of misalignment between the test point of the diode and the test probe 400.

[0026] Preferably, the lifting cylinder 300 can move laterally on the slide rail 210, and the position of the lifting cylinder 300 relative to the detection station 110 is adjusted by an external debugging cylinder before the photovoltaic junction box is tested. Before the device is tested, there may be an offset error between the lifting cylinder 300 and the detection station 110. Therefore, multiple cylinder debugging is required to match the position of the lifting cylinder 300 with the detection station 110. According to the change of the diode arrangement in the photovoltaic junction box, the arrangement of the corresponding test probe 400 also needs to be changed accordingly. Therefore, photovoltaic junction boxes corresponding to different product models need to undergo position adjustment of the lifting cylinder relative to the slide rail before testing to ensure the accuracy of the test results.

[0027] Preferably, the detection controller 500 has a human-computer interaction interface, which includes an operation button 510, a display screen 520 for displaying the detection data of the photovoltaic junction box, and an alarm 530 for warning that the photovoltaic junction box is unqualified and the entire device is faulty. The display screen 520 can display the detection results in real time, and the product model and historical detection data can also be viewed. The product model can be input and the detection conditions can be changed and set through the operation button 510. It also includes a power button, a detection start button and a button for releasing unqualified products. When unqualified products appear, an audible and visual alarm is issued, which facilitates the operator's operation.

[0028] Preferably, the photovoltaic junction box inspection station 100 may also be provided with a laser engraving machine (omitted in the figure) and / or a barcode scanner (omitted in the figure). The laser engraving machine is electrically connected to the inspection controller, and is used to automatically engrave a code on the photovoltaic junction box after the photovoltaic junction box has passed the inspection; the barcode scanner is electrically connected to the inspection controller 500, and is used to automatically scan the product barcode of the photovoltaic junction box after the photovoltaic junction box has passed the inspection. That is, according to customer needs, a laser engraving machine or a barcode scanner or a laser engraving machine and a barcode scanner can be equipped at the same time. When the product passes the inspection, the inspection controller 500 will automatically generate a corresponding identification code for the product. Before the product is produced, the identity code is engraved on the product by the laser engraving machine, which is convenient for quickly checking the product inspection data through a barcode scanner when there is a problem with the product, which brings great convenience to customers and saves time in checking product inspection records.

[0029] Preferably, the detection controller 500 controls the detection of the characteristics of each diode in the photovoltaic junction box, including forward voltage drop, reverse leakage, reverse voltage drop, and resistance of the positive and negative lines. The detection controller is preset with preset values ​​of sampling data of the diodes in the photovoltaic junction box under normal conditions. By testing the above parameters, it is possible to promptly detect open circuits, short circuits, reverse polarity installation, and diodes that do not meet the requirements. By testing the resistance of the male and female lines, it is possible to promptly detect whether the male and female heads of the junction box have short cores, reliable riveting, or are installed reversely.

[0030] Preferably, the detection controller 500 also has a network communication interface and a memory card. The real-time data of the detection is transmitted to the computer device 600 through an external computer device 600. The data is saved and the data is checked and printed through the computer device 600. The data is automatically saved through the memory card. In this embodiment, a 2G SD card is equipped, which can save nearly 300,000 product records, which is beneficial to data protection when the device suddenly loses power. The device can be remotely monitored through the external computer device 600, and a large amount of data can be saved, analyzed and printed.

[0031] Preferably, the detection controller 500 controls the detection stations 110 to implement detection in sequence according to the insertion order fed back by the sensor 120, that is, the two detection stations 110 are inserted with the photovoltaic junction boxes to be detected, and the detection controller 500 will control the implementation of the detection stations according to the insertion time sequence fed back, and only one detection station can be detected at a time.

[0032] Preferably, the device can also be used to detect the characteristics of a single diode and to detect incoming diodes. If each incoming diode is tested before assembling the photovoltaic junction box, the production qualification rate of the photovoltaic junction box can be further improved.

[0033] The photovoltaic junction box diode characteristic detection device provided in this embodiment can test the diodes, male and female line resistances, and diode incoming inspection in the solar photovoltaic junction box; each junction box completes the test at one time, and all test results are displayed digitally at the same time; when the measured data does not meet the set requirements, it has visual and auditory alarm devices, which not only maintains the requirements for testing the diodes in the junction box, but also meets the quality inspection requirements of a single diode, effectively avoids missing the diode, and can also determine whether the male and female heads of the junction box are short-core, riveted reliably, or installed upside down by testing the male and female line resistance. The operation is simple, the test data is reliable, it can effectively identify whether the product is qualified, and can meet customer needs through the expansion of external functions.

[0034] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, various modifications or improvements can be made to the present invention without departing from the principle of the present invention, which are all considered to be within the scope of protection of the present invention.

Claims

1. A photovoltaic junction box diode characteristic detection device, characterized in that: include A photovoltaic junction box detection station includes at least one detection station for locating the photovoltaic junction box, and each detection station is provided with a sensor for sensing the insertion of the photovoltaic junction box; A gantry bracket is erected on a photovoltaic junction box inspection table. The gantry bracket includes a horizontally arranged slide rail. A corresponding number of lifting cylinders are arranged on the slide rail corresponding to the number of inspection stations. The lifting cylinder can move horizontally on the slide rail, and the position of the lifting cylinder relative to the inspection station is adjusted by an external debugging cylinder before the photovoltaic junction box is tested. A test probe is fixed to the bottom of the lifting cylinder. The test probe is arranged to match the distribution of the diode test points in the photovoltaic junction box. A photovoltaic junction box has three groups of diodes with correspondingly configured test probes, and the position of the diode test point is the copper sheet of the diode. The test probe contacts the copper sheet under the action of the lifting cylinder. The photovoltaic junction box with poor connection between the diode and the copper sheet can be effectively found, and the test of three groups of diodes can be completed at the same time, effectively avoiding missed detection of the diode. The detection controller is electrically connected to the lifting cylinder and the sensor. When detecting, the photovoltaic junction box is electrically connected to the detection controller. The sensor senses that the photovoltaic junction box is inserted, and the sensor feeds back to the detection controller. The detection controller controls the lifting cylinder to descend until the test probe contacts the diode test point in the photovoltaic junction box. The detection time is controlled by the detection controller, and the photovoltaic junction box feeds back the detection result to the detection controller. The detection controller controls the detection stations to perform detection in sequence according to the insertion order fed back by the sensor. Each inspection station is provided with a limiting groove for limiting the photovoltaic junction box and an adsorption tool for firmly adsorbing the photovoltaic junction box in the limiting groove. One end of the limiting groove is open for inserting the photovoltaic junction box. The limiting groove is surrounded by three blocks vertically on the photovoltaic junction box inspection platform on three sides of the limiting groove. The adsorption tool is set on a block opposite to the opening. The adsorption tool uses a pneumatic tool to perform a one-time adsorption operation on the photovoltaic junction box inserted into the opening. The photovoltaic junction box inspection station is also provided with a laser code engraving machine and / or a barcode scanner. The laser code engraving machine is electrically connected to the inspection controller and is used to automatically engrave a code on the photovoltaic junction box after the photovoltaic junction box is inspected and qualified; the barcode scanner is electrically connected to the inspection controller and is used to automatically scan the product barcode of the photovoltaic junction box after the photovoltaic junction box is inspected and qualified; when the product is inspected and qualified, the inspection controller automatically generates a corresponding identification code of the product, and before the product is produced, the identification code is engraved on the product by the laser code engraving machine; The detection controller also has a network communication interface and a memory card, which transmits the real-time data of the detection to the computer through an external computer device, saves the data through the computer device and performs data viewing and printing operations, and realizes automatic data storage through the memory card; The detection controller is provided with a human-machine interaction interface, which includes a control button, a display screen for displaying the detection data of the photovoltaic junction box, and an alarm for warning that the photovoltaic junction box is unqualified and the entire device is faulty; the display screen is used to display the detection results in real time, view the product model, and the historical data of the detection, and the product model is input through the control button, and the detection conditions are changed and set. It also includes a power button, a detection start button, and a button for releasing unqualified products. When unqualified products appear, an audible and visual alarm is issued; The detection controller controls the detection of the characteristics of each diode in the photovoltaic junction box, including forward voltage drop, reverse leakage, reverse voltage drop, and positive and negative line resistance. The detection controller is preset with preset values ​​of the sampling data of the diodes in the photovoltaic junction box under normal conditions; The device can also be used to detect the characteristics of a single diode. Each junction box completes the diode, male and female line resistance, and diode incoming inspection test at one time, and the test results are displayed digitally at the same time. The male and female line resistance is tested to determine whether the male and female heads of the junction box are short-core, riveted reliably, or installed upside down.

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