EL testing device and testing method thereof

Abstract

The present invention discloses a novel EL testing device and a testing method thereof, comprising an EL detector and a conveying device, wherein the conveying device is used to convey a photovoltaic component to be tested; the EL detector comprises a housing, an EL camera and a computer processing system, wherein the EL camera is used to obtain an EL image of the photovoltaic component to be tested, the EL camera is fixed in the middle of the top of the housing, and the EL camera is electrically connected to the computer processing system; a sliding component is installed at the top of the housing, and a plurality of connection contacts are slidably connected on the sliding component, and the connection contacts are arranged correspondingly to the wiring box leads of the photovoltaic component to be tested; an adjustment component is installed between two adjacent connection contacts, and the adjustment component is used to adjust the distance between the two connection contacts, and the connection contacts at both ends of the sliding component are respectively connected to the positive and negative poles of a power supply. When the present invention performs an EL test on the photovoltaic component to be tested, it is not necessary to manually connect the wiring box leads of the photovoltaic component to be tested, thereby improving the efficiency of the EL test of the photovoltaic component.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic component defect detection, and in particular to a novel EL testing device and a testing method thereof. Background Art

[0002] EL stands for Electro Luminescence, which can also be called electronic luminescence detection. It uses the electroluminescence principle of crystalline silicon and uses a high-resolution infrared camera to capture near-infrared images of crystalline silicon. The acquired images are analyzed and processed by image software to determine the defects of photovoltaic modules. As the scale of my country's photovoltaic industry increases year by year, it is very important to use EL infrared testers to test whether photovoltaic modules are qualified during the production process.

[0003] However, the size and format of photovoltaic modules are not consistent, and when conducting EL testing on photovoltaic modules, it is necessary not only to connect the positive and negative terminal box leads at both ends of the photovoltaic module to the EL tester, but also to connect the terminal box leads in the middle section of the photovoltaic module to form a loop between the photovoltaic modules. The existing processing method is that workers use metal clips or other conductive objects to conduct the terminal box leads in the middle section one by one, which is too cumbersome and seriously affects the production efficiency of photovoltaic modules. Summary of the invention

[0004] The purpose of the present invention is to provide a novel EL testing device and a testing method thereof to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a new EL testing device, comprising an EL detector and a conveying device corresponding to the EL detector, the conveying device is used to convey the photovoltaic component to be tested; the EL detector comprises a shell, an EL camera and a computer processing system, the EL camera is used to obtain the EL image of the photovoltaic component to be tested, the EL camera is fixedly installed in the middle of the top end of the shell, and the EL camera is electrically connected to the computer processing system; an opening is provided on one side of the shell, and the conveying device extends into the shell through the opening; a sliding component is fixedly installed at the top end of the shell, and a plurality of connecting contacts are slidably connected to the sliding component, and the connecting contacts are corresponding to the leads of the junction box of the photovoltaic component to be tested; an adjusting component is installed between two adjacent connecting contacts, and the adjusting component is used to adjust the distance between the two connecting contacts, and the connecting contacts located at both ends of the sliding component are respectively connected to the positive and negative poles of a power supply.

[0006] Preferably, the sliding assembly includes two transverse slide rails and two longitudinal slide rails, the transverse slide rails are fixedly installed at the top end of the shell, and the transverse slide rails are symmetrically arranged on both sides of the EL camera, and the transverse slide rails are arranged perpendicular to the conveying direction of the conveying device; the longitudinal slide rails are slidably connected to the bottom of the transverse slide rails, and the longitudinal slide rails are arranged perpendicular to the transverse slide rails; the connecting contacts are slidably connected to the longitudinal slide rails, and the adjustment assembly is installed between two adjacent connecting contacts on the same longitudinal slide rail, and the connecting contacts located at both ends of the longitudinal slide rails are respectively connected to the positive and negative poles of the power supply.

[0007] Preferably, a connecting slide rail is arranged between the two longitudinal slide rails, and the two ends of the connecting slide rail are respectively slidably connected to the two longitudinal slide rails, and a plurality of connecting contacts are slidably connected on the connecting slide rail, and the connecting contacts located at the two ends of the connecting slide rail are respectively connected to the positive and negative poles of the power supply, and the adjustment component is installed between two adjacent connecting contacts on the connecting slide rail.

[0008] Preferably, the longitudinal slide rail and the connecting slide rail are both provided with slide grooves, and the connecting contacts are slidingly connected to the longitudinal slide rail and the connecting slide rail respectively through the slide grooves; the slide grooves are both provided on opposite sides of the longitudinal slide rail, and both ends of the connecting slide rail are slidingly connected in the slide grooves of the longitudinal slide rail, and the connecting contacts on the longitudinal slide rail and the connecting slide rail are respectively arranged on both sides of the longitudinal slide rail.

[0009] Preferably, the connecting contact point includes an installation slide slidably connected to the slide slot, the installation slide is fixedly connected to a control box on a side away from the slide slot, the fixed end of the telescopic assembly is fixedly connected to the control box, the movable end of the telescopic assembly is fixedly connected to a connecting plate, both ends of the connecting plate are fixedly connected to the top end of the telescopic rod, and the bottom ends of the two telescopic rods are fixedly connected to metal sheets; a spring is sleeved on the telescopic rod, and both ends of the spring are fixedly connected to the connecting plate and the metal sheet respectively.

[0010] Preferably, the telescopic assembly is an electric telescopic rod or a cylinder.

[0011] Preferably, the adjustment component includes a telescopic tube, which includes an outer tube and an inner tube sleeved in the outer tube, the inner tube and the outer tube are slidably limited and cooperated, and the outer tube and the inner tube are respectively fixedly connected to two adjacent control boxes; a slider is slidably sleeved on one end of the outer tube close to the inner tube, a motor is fixed in the control box to which the outer tube is fixed, and a screw is transmission-connected to the output end of the motor, the screw passes through the slider and is fixedly connected to a baffle, the screw is threadedly connected to the slider, and the length of the screw is the same as the length of the outer tube; a connecting rod is fixedly connected to the outer wall of the control box to which the inner tube is fixed, and the end of the connecting rod is fixedly connected to the slider.

[0012] Preferably, a positioning buffer pad is fixedly connected to the inner wall of the shell corresponding to the opening, and the positioning buffer pad is arranged corresponding to the conveying device.

[0013] A testing method using a novel EL testing device specifically comprises the following steps:

[0014] a. Equipment debugging: adjust the distance between sliding components and the distance between two adjacent connection points according to the photovoltaic components to be tested;

[0015] b. Positioning the photovoltaic module to be tested, using a conveying device to transport the photovoltaic module to be tested into the housing, and making the photovoltaic module to be tested correspond to the EL camera, and making the junction box lead of the photovoltaic module to be tested correspond to the connection contact;

[0016] c. Conduct the test by connecting the leads of the junction boxes on the photovoltaic module to be tested using the connection contacts, so that the current output by the power supply forms a complete current loop in the photovoltaic module to be tested, and use the EL camera to obtain the EL image of the photovoltaic module to be tested. The EL camera transmits the obtained EL image information to the computer processing system for analysis;

[0017] d. Obtain the results. Based on the results obtained by the computer processing system, determine whether there are any problems with the cells in the photovoltaic module to be tested.

[0018] The present invention discloses the following technical effects: the new EL testing device provided by the present invention does not need to manually connect the leads of the junction box of the photovoltaic module to be tested when performing EL testing on the photovoltaic module to be tested, thereby improving the efficiency of the EL testing of the photovoltaic module; the new EL testing device provided by the present invention can accurately detect whether there are potential defects in the photovoltaic module to be tested placed in the shell, thereby improving the reliability of the photovoltaic module and avoiding the use of defective photovoltaic modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of a novel EL testing device of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0022] Among them, there are conveying device-1, shell-2, EL camera-3, computer processing system-4, transverse slide rail-5, longitudinal slide rail-6, connecting slide rail-7, slide groove-8, mounting slide plate-9, control box-10, telescopic component-11, connecting plate-12, telescopic rod-13, metal sheet-14, spring-15, outer tube-16, inner tube-17, slider-18, motor-19, screw-20, baffle-21, connecting rod-22, positioning buffer pad-23. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The present invention provides a novel EL testing device, comprising an EL detector and a conveying device 1 corresponding to the EL detector, wherein the conveying device 1 is used to convey a photovoltaic component to be tested; the EL detector comprises a shell 2, an EL camera 3 and a computer processing system 4, wherein the EL camera 3 is used to obtain an EL image of the photovoltaic component to be tested, wherein the EL camera 3 is fixedly installed at the middle of the top end inside the shell 2, and the EL camera 3 is electrically connected to the computer processing system 4; an opening is provided on one side of the shell 2, and the conveying device 1 extends into the shell 2 through the opening; a sliding component is fixedly installed at the top end inside the shell 2, wherein a plurality of connection contacts are slidably connected to the sliding component, and the connection contacts are correspondingly arranged to the leads of a junction box of the photovoltaic component to be tested; an adjusting component is installed between two adjacent connection contacts, wherein the adjusting component is used to adjust the distance between the two connection contacts, and the connection contacts located at both ends of the sliding component are respectively connected to the positive pole and the negative pole of a power supply.

[0026] Furthermore, in order to meet the requirements of EL testing of photovoltaic modules of more sizes, the sliding assembly includes two transverse slide rails 5 and two longitudinal slide rails 6. The transverse slide rail 5 is fixedly installed at the top of the shell 2, and the transverse slide rails 5 are symmetrically arranged on both sides of the EL camera 3. The transverse slide rails 5 are arranged perpendicular to the conveying direction of the conveying device 1; the longitudinal slide rail 6 is slidably connected to the bottom of the transverse slide rail 5, and the longitudinal slide rail 6 is arranged perpendicular to the transverse slide rail 5; the connection contacts are slidably connected to the longitudinal slide rail 6, and an adjustment assembly is installed between two adjacent connection contacts on the same longitudinal slide rail 6. The connection contacts at both ends of the longitudinal slide rail 6 are respectively connected to the positive and negative poles of the power supply. By adjusting the position of the longitudinal slide rail 6 on the transverse slide rail 5, it can be ensured that the connection contacts on the longitudinal slide rail 6 can be connected to the junction box leads of photovoltaic modules to be tested of different sizes.

[0027] Furthermore, in order to improve the practicality of the EL tester and enable it to perform EL tests on photovoltaic modules of different types, a connecting slide rail 7 is arranged between the two longitudinal slide rails 6, and the two ends of the connecting slide rail 7 are respectively slidably connected to the two longitudinal slide rails 6. A number of connecting contacts are slidably connected on the connecting slide rail 7, and the connecting contacts located at the two ends of the connecting slide rail 7 are respectively connected to the positive and negative poles of the power supply, and an adjustment component is installed between two adjacent connecting contacts on the connecting slide rail 7.

[0028] Furthermore, in order to adjust the spacing between the two longitudinal slide rails 6 when the connecting slide rail 7 is provided, an electric telescopic claw is fixedly connected to the inner wall of the housing 2. When the spacing between the two longitudinal slide rails 6 needs to be adjusted, the connecting slide rail 7 is first fixed by the electric telescopic claw, and the electric telescopic claw is controlled to contract so that the connecting slide rail 7 is separated from the longitudinal slide rail 6. Then, the spacing between the two longitudinal slide rails 6 can be adjusted without being affected by the connecting slide rail 7. In order to ensure that the positions of the longitudinal slide rail 6 and the connecting slide rail 7 remain stable, positioning bolts are installed on the longitudinal slide rail 6 and the connecting slide rail 7, and the positioning bolts are used to fix the longitudinal slide rail 6 and the transverse slide rail 5, and the longitudinal slide rail 6 and the connecting slide rail 7.

[0029] Furthermore, in order to facilitate the adjustment of the connecting contacts, sliding grooves 8 are provided on the longitudinal slide rail 6 and the connecting slide rail 7, and the connecting contacts are slidingly connected to the longitudinal slide rail 6 and the connecting slide rail 7 respectively through the sliding grooves 8; sliding grooves 8 are provided on the opposite sides of the longitudinal slide rail 6, and both ends of the connecting slide rail 7 are slidingly connected in the sliding grooves 8 of the longitudinal slide rail 6, and the connecting contacts on the longitudinal slide rail 6 and the connecting slide rail 7 are respectively arranged on both sides of the longitudinal slide rail 6.

[0030] Furthermore, the connection contact includes a mounting plate 9 slidably connected in the slide slot 8, a control box 10 is fixedly connected to the side of the mounting plate 9 away from the slide slot 8, a fixed end of a telescopic assembly 11 is fixedly connected in the control box 10, the telescopic assembly 11 can be selected from either an electric telescopic rod or a cylinder, a connecting plate 12 is fixedly connected to the movable end of the telescopic assembly 11, both ends of the connecting plate 12 are fixedly connected to the top of a telescopic rod 13, and the bottom ends of the two telescopic rods 13 are fixedly connected to a metal sheet 14; a spring 15 is sleeved on the telescopic rod 13, and both ends of the spring 15 are fixedly connected to the connecting plate 12 and the metal sheet 14 respectively. In order to facilitate the positioning and adjustment of the connection contact, positioning bolts are installed on the mounting plate 9 of the connection contact at one end of the longitudinal slide rail 6 and the connection contact at one end of the connecting slide rail 7, and the mounting plate 9 of the connection contact at one end is fixed by the positioning bolt, so that other connection contacts can be conveniently adjusted in position with reference to the fixed connection contact.

[0031] Furthermore, in order to facilitate the adjustment of the distance between the two connecting contact points so as to realize automatic control, the adjustment component includes a telescopic tube, which includes an outer tube 16 and an inner tube 17 sleeved in the outer tube 16, the inner tube 17 and the outer tube 16 are slidably limited and matched, and the outer tube 16 and the inner tube 17 are respectively fixedly connected to two adjacent control boxes 10; a slider 18 is slidably sleeved on one end of the outer tube 16 close to the inner tube 17, and a motor 19 is fixed in the control box 10 to which the outer tube 16 is fixed, and a screw 20 is transmission-connected to the output end of the motor 19, the screw 20 passes through the slider 18 and is fixedly connected to a baffle 21, the screw 20 is threadedly connected to the slider 18, and the length of the screw 20 is the same as the length of the outer tube 16; a connecting rod 22 is fixedly connected to the outer wall of the control box 10 to which the inner tube 17 is fixed, and the end of the connecting rod 22 is fixedly connected to the slider 18. In the initial state, the slider 18 is located at one end of the outer tube 16 close to the inner tube 17, and the screw 20 is driven to rotate by the motor 19. Under the cooperation of the threads of the screw 20 and the slider 18, the slider 18 moves in the direction of the motor 19. At the same time, since a connecting rod 22 is fixed on the slider 18, and the other end of the connecting rod 22 is fixed on another control box 10, when the slider 18 moves, the two control boxes 10 will be pulled closer together under the action of the connecting rod 22. At this time, the inner tube 17 will gradually extend into the outer tube 16 until the distance between the two control boxes 10 meets the test requirements. Since the mounting slide 9 at one end is fixed in position, during the adjustment process, the other mounting slides 9 all move toward the fixed mounting slide 9.

[0032] Furthermore, in order to facilitate the positioning of the photovoltaic assembly to be tested and to avoid damage to the photovoltaic assembly to be tested during positioning, a positioning buffer pad 23 is fixedly connected to the inner wall of the housing 2 corresponding to the opening, and the positioning buffer pad 23 is arranged corresponding to the conveying device 1. During positioning, it is only necessary for the photovoltaic assembly to be tested to contact one side of the photovoltaic assembly to be tested with the positioning buffer pad 23 under the action of the conveying device 1.

[0033] The novel EL testing device provided by the present invention comprises the following steps when performing a test:

[0034] a. Equipment debugging: adjust the distance between sliding components and the distance between two adjacent connection points according to the photovoltaic components to be tested;

[0035] b. Positioning the photovoltaic module to be tested, using the conveying device 1 to transport the photovoltaic module to be tested into the housing 2, and making the photovoltaic module to be tested correspond to the EL camera 3, and making the junction box lead of the photovoltaic module to be tested correspond to the connection contact;

[0036] c. Conducting a test, connecting the leads of the junction boxes on the photovoltaic module to be tested by using the connection contacts, so that the current output by the power supply forms a complete current loop in the photovoltaic module to be tested, and using the EL camera 3 to obtain the EL image of the photovoltaic module to be tested, and the EL camera 3 transmits the obtained EL image information to the computer processing system 4 for analysis;

[0037] d. Obtaining a result, and judging whether there is a problem with the cell in the photovoltaic module to be tested according to the result obtained by the computer processing system 4.

[0038] The novel EL testing device provided by the present invention does not need to manually connect the wiring box leads of the photovoltaic module to be tested when performing EL testing on the photovoltaic module to be tested, thereby improving the efficiency of the EL testing of the photovoltaic module; and the adjustment process of the connection contacts can be controlled by a controller. When the controller is used for control, it is only necessary to use the controller to control the start of the telescopic component 11 and the motor 19, which is conducive to the automated production of the production line; the novel EL testing device provided by the present invention can accurately detect whether the photovoltaic module to be tested placed in the shell 2 has potential defects, thereby improving the reliability of the photovoltaic module and avoiding the use of defective photovoltaic modules.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An EL testing device, characterized in that: The invention comprises an EL detector and a conveying device (1) arranged corresponding to the EL detector, wherein the conveying device (1) is used to convey the photovoltaic component to be tested; the EL detector comprises a shell (2), an EL camera (3) and a computer processing system (4), wherein the EL camera (3) is used to obtain the EL image of the photovoltaic component to be tested, wherein the EL camera (3) is fixedly installed at the middle of the top end inside the shell (2), and the EL camera (3) is electrically connected to the computer processing system (4); an opening is arranged on one side of the shell (2), and the conveying device (1) extends into the shell (2) through the opening; a sliding component is fixedly installed at the top end inside the shell (2), and a plurality of connection contacts are slidably connected to the sliding component, and the connection contacts are arranged corresponding to the leads of the junction box of the photovoltaic component to be tested; an adjustment component is installed between two adjacent connection contacts, and the adjustment component is used to adjust the distance between the two connection contacts, and the connection contacts located at both ends of the sliding component are respectively connected to the positive pole and the negative pole of the power supply; The sliding assembly comprises two transverse slide rails (5) and two longitudinal slide rails (6), wherein the transverse slide rails (5) are fixedly mounted on the top of the housing (2), and the transverse slide rails (5) are symmetrically arranged on both sides of the EL camera (3), and the transverse slide rails (5) are arranged perpendicularly to the conveying direction of the conveying device (1); the longitudinal slide rails (6) are slidably connected to the bottom of the transverse slide rails (5), and the longitudinal slide rails (6) are arranged perpendicularly to the transverse slide rails (5); the connection contacts are slidably connected to the longitudinal slide rails (6), and the adjustment assembly is installed between two adjacent connection contacts on the same longitudinal slide rail (6), and the connection contacts located at both ends of the longitudinal slide rail (6) are respectively connected to the positive and negative poles of the power supply; A connecting slide rail (7) is arranged between the two longitudinal slide rails (6), the two ends of the connecting slide rail (7) are respectively slidably connected to the two longitudinal slide rails (6), a plurality of connecting contacts are slidably connected on the connecting slide rail (7), the connecting contacts located at the two ends of the connecting slide rail (7) are respectively connected to the positive pole and the negative pole of the power supply, and the adjusting component is installed between two adjacent connecting contacts on the connecting slide rail (7); The longitudinal slide rail (6) and the connecting slide rail (7) are both provided with a slide groove (8), and the connecting contact point is slidably connected to the longitudinal slide rail (6) and the connecting slide rail (7) through the slide groove (8); the longitudinal slide rail (6) is provided with the slide groove (8) on both opposite sides, and both ends of the connecting slide rail (7) are slidably connected to the slide groove (8) of the longitudinal slide rail (6), and the connecting contact point on the longitudinal slide rail (6) and the connecting slide rail (7) are respectively arranged on both sides of the longitudinal slide rail (6); The connection contact point comprises an installation slide plate (9) slidably connected in the slide groove (8); a control box (10) is fixedly connected to the side of the installation slide plate (9) away from the slide groove (8); a fixed end of a telescopic component (11) is fixedly connected in the control box (10); a movable end of the telescopic component (11) is fixedly connected to a connecting plate (12); both ends of the connecting plate (12) are fixedly connected to the top end of a telescopic rod (13); the bottom ends of the two telescopic rods (13) are fixedly connected to a metal sheet (14); a spring (15) is sleeved on the telescopic rod (13); the two ends of the spring (15) are fixedly connected to the connecting plate (12) and the metal sheet (14) respectively; The telescopic component (11) is an electric telescopic rod or a cylinder; The adjustment component comprises a telescopic tube, the telescopic tube comprises an outer tube (16) and an inner tube (17) sleeved inside the outer tube (16), the inner tube (17) and the outer tube (16) are slidably limited and matched, the outer tube (16) and the inner tube (17) are respectively fixedly connected to two adjacent control boxes (10); a slider (18) is slidably sleeved on one end of the outer tube (16) close to the inner tube (17), and a motor (18) is fixed inside the control box (10) to which the outer tube (16) is fixed. 19), the output end of the motor (19) is transmission-connected with a screw rod (20), the screw rod (20) passes through the slider (18) and is fixedly connected with a baffle (21), the screw rod (20) is threadedly connected to the slider (18), and the length of the screw rod (20) is the same as the length of the outer tube (16); a connecting rod (22) is fixedly connected to the outer wall of the control box (10) to which the inner tube (17) is fixed, and the end of the connecting rod (22) is fixedly connected to the slider (18).

2. The EL testing device according to claim 1, characterized in that: A positioning buffer pad (23) is fixedly connected to the inner wall of the shell (2) corresponding to the opening, and the positioning buffer pad (23) is arranged corresponding to the conveying device (1).

3. A testing method for an EL testing device, characterized in that: Using the EL testing device according to any one of claims 1 to 2 specifically comprises the following steps: a. Equipment debugging: adjust the distance between sliding components and the distance between two adjacent connection points according to the photovoltaic components to be tested; b. Positioning the photovoltaic module to be tested, using the conveying device (1) to transport the photovoltaic module to be tested to the inside of the housing (2), and making the photovoltaic module to be tested correspond to the EL camera (3), and making the junction box lead of the photovoltaic module to be tested correspond to the connection contact; c. Conducting a test, connecting the leads of the junction boxes on the photovoltaic module to be tested by using the connection contacts, so that the current output by the power supply forms a complete current loop in the photovoltaic module to be tested, and using the EL camera (3) to obtain the EL image of the photovoltaic module to be tested. The EL camera (3) transmits the obtained EL image information to the computer processing system (4) for analysis; d. Obtaining a result, and judging whether there is a problem with the cell in the photovoltaic module to be tested according to the result obtained by the computer processing system (4).

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