EL detection device

Abstract

The utility model relates to the technical field of photovoltaic module preparation, and particularly discloses an EL detection device. The EL detection device comprises a rack, a feeding conveying line, a battery string carrying mechanism and a detection camera, the feeding conveying line can convey a to-be-detected battery string; the battery string carrying mechanism is located above the feeding conveying line and comprises an overturning frame, a suction cup assembly and two clamping assemblies, wherein the suction cup assembly and the two clamping assemblies are arranged on the overturning frame. The turnover frame can move up and down and turn over relative to the rack; the suction cup assembly can perform non-contact adsorption on each battery piece in the battery string, and the two clamping assemblies are arranged on the two sides of the suction cup assembly respectively and can clamp and fix the welding strip end of the battery string; the detection camera is located on one side of the overturning frame and can shoot images of the overturned battery strings. The EL detection device is accurate and efficient in detection, and can effectively solve the problem of cell fragmentation caused by carrying contact.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module manufacturing technology, and in particular to an EL detection device. Background Technology

[0002] In the fabrication process of photovoltaic solar cells, cells need to be connected by solder ribbons to form a cell string structure with specific dimensions. After the cell strings are fabricated, they are usually subjected to electrical testing, i.e., EL testing.

[0003] In traditional battery string EL testing, a transport mechanism moves the batteries to the power-on testing station, applies power to the protruding solder strip ends on both sides of the battery string, and begins EL testing. After EL testing, the power is disconnected, and the transport mechanism removes the battery string from the power-on testing station. However, because the transport mechanism uses several vacuum suction heads to hold and fix the battery cells, and the battery cells are very thin and fragile, they are easily broken due to contact and collision during transport. This can damage the battery string, which may have been flawless, thus affecting the product yield during the testing process. Summary of the Invention

[0004] The purpose of this invention is to provide an EL detection device that is accurate and efficient, and can effectively solve the problem of battery cell breakage caused by handling and contact.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An EL testing device includes a frame, a feeding conveyor line, a battery string handling mechanism, and a testing camera;

[0007] The feeding conveyor line can transport the battery strings to be tested;

[0008] The battery string transport mechanism is located above the feeding conveyor line and includes a flipping frame, a suction cup assembly and two clamping assemblies mounted on the flipping frame; the flipping frame can move up and down and flip relative to the frame; the suction cup assembly can non-contactly adsorb each battery cell in the battery string; the two clamping assemblies are respectively located on both sides of the suction cup assembly and can clamp and fix the solder strip end of the battery string.

[0009] The detection camera is located on one side of the flipping frame and is capable of capturing images of the flipped battery string.

[0010] Furthermore, the suction cup assembly includes a plurality of Bernoulli suction cups spaced apart on the flipping frame along the conveying direction of the feed conveyor line.

[0011] Furthermore, a Bernoulli suction cup is used to attach and fix a battery cell.

[0012] Furthermore, the spacing between two adjacent Bernoulli suction cups is adjustable.

[0013] Furthermore, the flipping frame is provided with a positioning component for side positioning of the battery string adsorbed by the suction cup assembly.

[0014] Furthermore, the clamping assembly includes a conductive copper block, a pressure plate, and a rotation drive; the conductive copper block is connected to the flipping frame; the pressure plate is rotatably mounted on the flipping frame; the rotation drive drives the pressure plate to rotate relative to the flipping frame, so that the pressure plate and the conductive copper block cooperate to clamp and fix the solder strip end of the battery string.

[0015] Furthermore, the battery string transport mechanism includes a connecting frame rotatably connected to the flipping frame, and the connecting frame is provided with a flipping drive for driving the flipping frame to flip; the connecting frame is connected to a vertical moving module that drives it to move up and down relative to the frame.

[0016] Furthermore, the feeding conveyor line is provided with an output conveyor line for receiving and conveying qualified battery strings and an NG material box for receiving unqualified battery strings on both sides.

[0017] Furthermore, the connecting frame is connected to a horizontal moving module that drives it to move horizontally relative to the frame.

[0018] Furthermore, an infrared safety light curtain is installed on the frame.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model discloses an EL testing device that utilizes a feeding conveyor line to transport battery strings to be tested. A suction cup assembly moves up and down with a flipping frame, adsorbing and lifting the battery strings from the feeding conveyor line through non-contact adsorption. Two clamping components hold and fix the two solder strip ends of the battery strings to facilitate energizing them. By flipping the flipping frame, the battery strings are rotated so that their bottom surface faces the testing camera, allowing the camera to capture images. This EL testing device has a simple structure, provides accurate and efficient testing, and effectively avoids the problem of battery breakage caused by contact during handling due to the non-contact adsorption method used to fix the battery strings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an EL detection device provided by this utility model.

[0022] Figure 2 This is a front view of an EL detection device provided by this utility model.

[0023] Figure 3 yes Figure 3 Enlarged schematic diagram of point I in the diagram.

[0024] Figure 4 This is a schematic diagram of the Bernoulli suction cup.

[0025] Figure 5 This is a schematic diagram of the Bernoulli suction cup from another angle. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 5 As shown, an EL (Electro-Mechanical Inspection) device includes a frame 1, a feeding conveyor line 2, a battery string transport mechanism 3, and an inspection camera 4. The feeding conveyor line 2 is used to transport the battery strings to be inspected. The battery string transport mechanism 3 is located above the feeding conveyor line 2 and includes a flipping frame 31, a suction cup assembly 32 mounted on the flipping frame 31, and two clamping assemblies 33. The flipping frame 31 can move up and down and flip relative to the frame 1. The suction cup assembly 32 can non-contactly adsorb each battery cell in the battery string. The two clamping assemblies 33 are located on both sides of the suction cup assembly 32 and can clamp and fix the solder strip ends of the battery string. The inspection camera 4 is located on one side of the flipping frame 31 and can capture images of the flipped battery string.

[0028] Specifically, a mounting platform is provided on the frame 1, and the feeding conveyor line 2 is mounted on this mounting platform. On both sides of the feeding conveyor line 2 are respectively provided an output conveyor line 7 for receiving and conveying qualified battery strings and an NG (no-load) material box 8 for receiving unqualified battery strings. In this embodiment, both the feeding conveyor line 2 and the output conveyor line 7 are preferably belt conveyors.

[0029] like Figure 1 and 2 As shown, the flipping frame 31 preferably adopts a horizontal rod-shaped structure. The battery string transport mechanism 3 also includes a connecting frame 34 rotatably connected to the flipping frame 31, and the connecting frame 34 is provided with a flipping drive 5 for driving the flipping frame 31 to flip, which is preferably a servo motor.

[0030] In use, driven by the flipping drive 5, the flipping frame 31 flips, causing the battery string that is attracted by the suction cup assembly 32 and clamped and fixed by the two clamping assemblies 33 to rotate together, so that the detection camera 4 can take pictures.

[0031] like Figure 2 As shown, the suction cup assembly 32 includes a plurality of Bernoulli suction cups 321 spaced apart on the tilting frame 31 along the conveying direction of the feed conveyor line 2. In this embodiment, the structure of the Bernoulli suction cups 321 is as follows: Figure 4 and5 As shown. Preferably, a Bernoulli suction cup 321 is used to attach and fix a battery cell.

[0032] When in use, a high-speed airflow is blown out from the side of the bottom of the Bernoulli suction cup 321. The battery string is attracted by the principle that the pressure is low where the airflow is high. When the battery string is attracted, the high-speed airflow will block the battery string from coming into contact with the surface of the mechanical components, thus avoiding damage to the battery cells.

[0033] Furthermore, the spacing between two adjacent Bernoulli suction cups 321 is adjustable. In this embodiment, multiple mounting holes for a Bernoulli suction cup 321 can be provided on the flip frame 31. By fixing the Bernoulli suction cup 321 in different mounting holes, the spacing between two adjacent Bernoulli suction cups 321 can be adjusted. Alternatively, each Bernoulli suction cup 321 can be horizontally slidably mounted on the flip frame 31 and locked using locking screws or other locking devices. When it is necessary to adjust the spacing between two adjacent Bernoulli suction cups 321, first release the lock on the Bernoulli suction cup 321, then slide the Bernoulli suction cup 321 to adjust the spacing, and finally lock the Bernoulli suction cup 321.

[0034] To prevent the battery cells from shifting during the non-contact adsorption process, a positioning component can be installed on the flipping frame 31 to position the battery string on its sides. In this embodiment, the positioning component can be a positioning piece, a positioning block, or a positioning pin, etc.

[0035] like Figure 3 As shown, the clamping assembly 33 includes a conductive copper block 331, a pressure plate 332, and a rotation drive 333. The conductive copper block 331 is connected to the flipping frame 31; the pressure plate 332 is rotatably mounted on the flipping frame 31; the rotation drive 333 drives the pressure plate 332 to rotate relative to the flipping frame 31, so that the pressure plate 332 and the conductive copper block 331 cooperate to clamp and fix the solder strip ends of the battery string. The conductive copper blocks 331 located at both ends of the solder strip are energized to detect the energization of the battery string.

[0036] In this embodiment, the battery string transport mechanism 3 further includes a vertical moving module 61 and a horizontal moving module 62. The vertical moving module 61 drives the connecting frame 34 to move vertically relative to the frame 1, enabling the suction cup assembly 32 to pick up battery strings from the feed conveyor line 2 and lift the battery strings after picking them up. The horizontal moving module 62 drives the connecting frame 34 to move horizontally relative to the frame 1, transporting the inspected battery strings to the discharge conveyor line 7 or the NG material box 8.

[0037] The vertical moving module 61 is preferably an electric linear slide. The horizontal moving module 62 includes two guide rails horizontally arranged on the frame 1, and the guide rails are slidably connected to the mounting base via sliders; the horizontal moving module 62 also includes two pulleys rotatably arranged on the frame 1, and the two pulleys are connected by belt drive, one of the pulleys being connected to a drive motor that drives its rotation; the mounting base is connected to the belt via a connector, and the vertical moving module 61 is mounted on the mounting base.

[0038] Furthermore, an infrared safety light curtain 9 is installed on the frame 1 to prevent the operator from accidentally touching the EL detection device during operation, thereby affecting the operator's safety.

[0039] This utility model discloses an EL testing device. In use, a feeding conveyor 2 transports a battery string to be tested; a flipping frame 31 moves downwards, allowing a suction cup assembly 32 to non-contactly adsorb the battery string on the feeding conveyor 2; after adsorbing the battery string, the flipping frame 31 moves upwards, lifting the battery string; two clamping assemblies 33 clamp and fix the two solder strip ends of the battery string; the flipping frame 31 flips, turning the battery string so that its bottom surface faces the testing camera 4; the battery string is powered on for testing, and the testing camera 4 captures an image of the battery string. This EL testing device has a simple structure, accurate and efficient testing, and because it uses a non-contact adsorption method to adsorb and fix the battery string, it effectively avoids the problem of battery breakage caused by contact during handling, which helps ensure the yield of battery strings in production testing operations.

[0040] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. An EL detection device, characterized in that, It includes a frame (1), a feeding conveyor line (2), a battery string handling mechanism (3), and a detection camera (4); The feeding conveyor line (2) is capable of conveying the battery string to be tested; The battery string transport mechanism (3) is located above the feeding conveyor line (2) and includes a flipping frame (31), a suction cup assembly (32) and two clamping assemblies (33) disposed on the flipping frame (31); the flipping frame (31) can move up and down and flip relative to the frame (1); the suction cup assembly (32) can non-contactly adsorb each battery cell in the battery string; the two clamping assemblies (33) are disposed on both sides of the suction cup assembly (32) and can clamp and fix the welding strip end of the battery string; The detection camera (4) is located on one side of the flipping frame (31) and is capable of taking pictures of the flipped battery string.

2. The EL detection device according to claim 1, characterized in that, The suction cup assembly (32) includes a plurality of Bernoulli suction cups (321) spaced apart on the flipping frame (31) along the conveying direction of the feed conveyor line (2).

3. The EL detection device according to claim 2, characterized in that, A Bernoulli suction cup (321) is used to attach and fix a battery cell.

4. An EL detection device according to claim 2 or 3, characterized in that, The spacing between two adjacent Bernoulli suction cups (321) is adjustable.

5. An EL detection device according to claim 1, characterized in that, The flipping frame (31) is provided with a positioning component for side positioning of the battery string adsorbed by the suction cup assembly (32).

6. The EL detection device according to claim 1, characterized in that, The clamping assembly (33) includes a conductive copper block (331), a pressure plate (332), and a rotation drive (333); the conductive copper block (331) is connected to the flipping frame (31); the pressure plate (332) is rotatably mounted on the flipping frame (31); the rotation drive (333) drives the pressure plate (332) to rotate relative to the flipping frame (31) so that the pressure plate (332) and the conductive copper block (331) cooperate to clamp and fix the solder strip end of the battery string.

7. An EL detection device according to claim 1, characterized in that, The battery string transport mechanism (3) includes a connecting frame (34) rotatably connected to the flipping frame (31), and a flipping drive (5) for driving the flipping frame (31) to flip; the connecting frame (34) is connected to a vertical moving module (61) that drives it to move up and down relative to the frame (1).

8. An EL detection device according to claim 7, characterized in that, The feeding conveyor line (2) is provided with a discharge conveyor line (7) for receiving and conveying qualified battery strings and an NG material box (8) for receiving unqualified battery strings on both sides.

9. An EL detection device according to claim 8, characterized in that, The connecting frame (34) is connected to a horizontal moving module (62) that drives it to move horizontally relative to the frame (1).

10. An EL detection device according to claim 1, characterized in that, An infrared safety light curtain (9) is installed on the frame (1).

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