A detection device

Abstract

The utility model discloses an embodiment provides a kind of detection device, it is related to battery piece detection technical field.Detection device includes background plate, light emitting piece and detection module.Background plate is used to place in the below of piece to be measured, light emitting piece is used to light to background plate to make piece to be measured project on background plate, and detection module is used to identify the imaging of piece to be measured and the projection of piece to be measured on background plate.Detection module can identify the edge collapse and the defect of missing pulp of piece to be measured by the imaging of piece to be measured and the projection of piece to be measured on background plate, improve the detection precision of defect.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, and more specifically, to a testing device. Background Technology

[0002] Currently, the inspection process in solar cell production typically uses Automatic Optical Inspector (AOI) technology. This technology uses high-resolution cameras, light sources, and image processing software to detect defects on the solar cells. However, in the images acquired by AOI, edge leakage and edge chipping defects appear almost identical, making them difficult to distinguish and resulting in low inspection accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a detection device that can distinguish between edge leakage and edge chipping defects on solar cells, thereby improving the accuracy of defect detection.

[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a detection device, comprising: Background board, used to place under the test piece; The light-emitting component is used to illuminate the background plate so that the test piece is projected onto the background plate; The detection module is used to identify the image of the test piece and its projection onto the background plate.

[0005] In an optional embodiment, the detection device further includes a determination module, which determines that the test piece has a chipped edge defect when the detection module detects that the edge of the projection of the test piece onto the background plate has a depression. If the detection module detects that the edge of the projection of the test piece onto the background board is protruding, the determination module determines that the test piece has a grout leakage defect. If the detection module detects that the edge of the projection of the test piece onto the background plate does not show any unevenness and the test piece is missing film color, the determination module determines that the test piece has an etching line defect.

[0006] In an optional embodiment, the number of light-emitting elements is multiple and they are spaced apart circumferentially along the background plate.

[0007] In an optional embodiment, the background plate has four side walls connected end to end in sequence, and each of the four side walls is provided with a light-emitting element, the color temperature of the light emitted by the light-emitting element is 4000k.

[0008] In an optional implementation, the light-emitting element is fixedly connected to the background plate.

[0009] In an optional embodiment, the light-emitting element includes a support and a light source. The support is disposed on the outer side wall of the background plate and extends along the thickness direction of the background plate. The light source and the test piece are located on the same side of the background plate, and the height distance between the light source and the test piece on the background plate is 20~25mm.

[0010] In an optional implementation, the support member is detachably connected to the background plate.

[0011] In an optional implementation, the support is connected to the background plate by screws, or the support is snapped into the background plate.

[0012] In an alternative implementation, the light source can be moved relative to the background plate along the thickness direction of the background plate.

[0013] In an optional embodiment, the detection device further includes a purging module for purging impurities on the background plate.

[0014] In an optional implementation, the background board is a PCB board and the surface of the background board is covered with a curtain, and the template is white.

[0015] The beneficial effects provided by this embodiment of the invention include: The detection device provided by this embodiment of the invention includes a background plate, a light-emitting element, and a detection module. The background plate is placed below the test piece, the light-emitting element illuminates the background plate so that the test piece is projected onto the background plate, and the detection module is used to identify the image of the test piece and its projection on the background plate. The detection module can identify edge chipping and slurry leakage defects on the test piece through the image of the test piece and its projection on the background plate, thus improving the detection accuracy of defects. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the detection device provided in this embodiment from a first-view perspective; Figure 2 This is a schematic diagram of the detection device provided in this embodiment from a second perspective; Figure 3 This is a schematic diagram of the projection onto the background board when the test piece has edge chipping defects; Figure 4 This is a schematic diagram of the projection onto the background board when the test piece has a grout leakage defect; Figure 5This is a schematic diagram of the projection onto the background plate when an etching line defect appears on the test piece.

[0018] Icons: 1-Detection device; 100-Background board; 200-Light-emitting component; 210-Support component; 220-Light source; 300-Detection module; 2-Test piece; 201-Projection. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] The following describes in detail, with reference to the accompanying drawings, the specific structure of a detection device provided by this utility model and its corresponding technical effects.

[0026] It should be noted that the test piece in this embodiment can be either a battery cell or a silicon wafer.

[0027] Some existing testing devices mainly use automated optical inspection (AIO) technology to detect defects in solar cells. However, during the AIO inspection process, the images of leakage and chipping at the edges of the solar cells are similar, making it impossible to accurately identify defects in the solar cells.

[0028] To address the aforementioned issues, the present invention provides a detection device that can accurately distinguish between defects such as leakage and chipping at the edge of solar cells, thereby improving the detection accuracy of solar cell defects and avoiding subsequent re-inspection due to inaccurate detection, thus improving the detection efficiency of solar cell defects.

[0029] Please refer to Figures 1-2 This utility model embodiment provides a detection device 1, which is mainly used to detect defects in the test piece 2.

[0030] The detection device 1 provided in this embodiment includes a background plate 100, a light-emitting element 200, and a detection module 300. The background plate 100 is used to place the test piece 2 below it, the light-emitting element 200 is used to illuminate the background plate 100 so that the test piece 2 is projected 201 onto the background plate 100, and the detection module 300 is used to identify the image of the test piece 2 and the projection 201 of the test piece 2 onto the background plate 100.

[0031] It is understandable that when the test piece 2 is placed above the background plate 100, and the light-emitting element 200 illuminates the background plate 100, the projection 201 of the test piece 2 above the background plate 100 can fall onto the background plate 100.

[0032] Please refer to Figure 3 It's easy to understand that if a recessed notch appears at the edge of the projection 201 on the background plate 100, it can be determined that the test piece 2 has a chipping defect. Please refer to... Figure 4 If the edge of the projection 201 of the test piece 2 on the background plate 100 protrudes, it can be determined that the test piece 2 has a grout leakage defect.

[0033] Please refer to Figure 5 If the projection 201 of the test piece 2 on the background plate 100 does not show any unevenness or gaps, but the detection module 300 detects that the test piece 2 has missing film color, it can be determined that there is a defect of etching line on the edge of the test battery.

[0034] Understandably, the detection device 1 provided in this embodiment, through the setting of the background plate 100 and the light source 220, makes the projection 201 of the test piece 2 fall on the background plate 100, so that the detection module 300 can detect the projection 201 of the battery cell on the background plate 100, thereby distinguishing the chipping or leakage defects of the test piece 2, and improving the defect detection accuracy of the test piece 2.

[0035] Optionally, this embodiment also includes a determination module, please refer to... Figure 3 If the detection module 300 detects a depression on the edge of the projection 201 of the test piece 2 on the background plate 100, the determination module determines that the test piece 2 has an edge chipping defect. Please refer to... Figure 4 If the detection module detects that the edge of the projection 201 of the test piece 2 on the background plate 100 protrudes, the determination module determines that the test piece 2 has a grout leakage defect. Please refer to... Figure 5 When the detection module detects that the edge of the projection 201 of the test piece 2 on the background plate 100 does not show any unevenness and the test piece 2 is missing film color, the determination module determines that the test piece 2 has an etching line defect.

[0036] As is easily understood, the detection module 300 can be a detection camera or an automatic optical inspection (AIO) device.

[0037] To better detect defects in the test piece 2 and ensure a clear projection 201 of the test piece 2 on the background plate 100, optionally, in some embodiments, the background plate 100 can be a PVC board with a screen on its surface. Understandably, PVC boards have low density and weight, are easy to process and mold, and possess good corrosion resistance and moisture resistance, as well as good electrical insulation to prevent static electricity accumulation. This makes them suitable for environments sensitive to electrostatic discharge (ESD), such as semiconductor and electronics manufacturing. The screen facilitates a larger color difference between the projection 201 of the test piece 2 and the background plate 100, thereby facilitating identification by the detection module 300 and improving the accuracy of defect detection for the test piece 2. Optionally, the screen can be made of fiberglass and can be white.

[0038] In detail, in this embodiment, there are multiple light-emitting elements 200 arranged at intervals along the circumference of the background plate 100. When detecting defects in the battery, personnel can selectively turn on which light-emitting elements 200 to ensure that the projection 201 of the test piece 2 falls on the background plate 100, thereby improving the efficiency of detecting battery cell defects.

[0039] In detail, the background plate 100 in this embodiment has four side walls connected end to end in sequence, and each of the four side walls is provided with a light-emitting element 200. The light emitted by the light-emitting element 200 has a color temperature of 4000K. The 4000K white light has moderate brightness, is not dazzling, and has a uniform spectrum without strong peaks (such as heavy blue or red light). It can be combined with the white screen on the background plate to form a high-contrast light and dark boundary, making the projection edge clean and sharp, which is convenient for the detection module 300 to identify the projection 201 of the test piece 2.

[0040] Understandably, when performing defect detection on the test piece 2, the user can choose to turn on one or more of the four light-emitting elements 200, so that the projection 201 of the test piece 2 appears on the background plate 100, thereby distinguishing defects in the test piece 2 based on the projection 201. The power of the light-emitting element 200 can be 18W, and the power supply is 220V / 50Hz.

[0041] Optionally, the light-emitting element 200 is fixedly connected to the background plate 100. This arrangement ensures the connection stability between the light-emitting element 200 and the background plate 100, and also ensures that the light-emitting element 200 and the battery cell to be tested on the background plate 100 are close to each other. This makes it easier for the projection 201 of the cell to be tested 2 to appear on the background plate 100.

[0042] In detail, the light-emitting element 200 includes a support 210 and a light source 220. The support 210 is disposed on the outer side wall of the background plate 100. This arrangement does not occupy the space on the upper surface of the background plate 100, thus avoiding affecting the projection 201 of the test piece 2 falling on the background plate 100. This ensures the accuracy of the detection module 300 in detecting the projection 201 of the test piece 2 falling on the background plate 100, and also improves the accuracy of identifying defects in the test piece 2.

[0043] The support member 210 extends along the thickness direction of the background plate 100. The light source 220 and the test piece 2 are located on the same side of the background plate 100, and the light source 220 is farther away from the background plate 100 than the test piece 2. That is, with Figure 1 For reference, when the test piece 2 is located above the background plate 100, the height of the light source 220 is higher than the height of the test piece 2. Specifically, the height distance between the light source 220 and the test piece 2 on the background plate 100 is 20~25mm. It is understandable that this 20~25mm height distance ensures a suitable divergence angle for the light source 220, preventing the divergence angle of the light emitted by the light source 220 from being too large or too small. This ensures that the light source 220 can make the projection 201 of the test piece 2 on the background plate 100 clear, so that the detection module 300 can acquire the projected image.

[0044] It should be noted that the support member 210 has a first end and a second end along the thickness direction of the background plate 100. The first end is connected to the background plate 100, and the second end is located on the upper side of the background plate 100, and a light source 220 is installed on the second end.

[0045] To facilitate the replacement of the light-emitting element 200, the support member 210 is detachably connected to the background plate 100. Understandably, when the light-emitting element 200 is damaged or the background plate 100 needs to be cleaned, the support member 210 can be separated from the background plate 100, which facilitates the replacement of the light-emitting element 200 and also facilitates the separate cleaning of the background plate 100, avoiding damage to the light source 220 in the light-emitting element 200 due to cleaning the background plate 100.

[0046] Optionally, the support member 210 can be connected to the background plate 100 by screws. Fixing the support member 210 to the background plate 100 with screws not only facilitates the assembly and disassembly of the support member 210 and the background plate 100 but also ensures the connection strength between the support member 210 and the background plate 100. Of course, in some other embodiments, the support member 210 can also be snapped onto the background plate 100. For example, the support member 210 is provided with a buckle, and the background plate 100 is provided with a hook that engages with the buckle.

[0047] Alternatively, in some other embodiments, the support member 210 may be non-detachably connected to the background plate 100. For example, the support member 210 may be connected to the background plate 100 by rivets, or the support member 210 may be glued to the background plate 100.

[0048] Alternatively, in some other embodiments, in order to facilitate the detection of battery cells of different sizes by the detection device 1, the light source 220 can move relative to the background plate 100 along the thickness direction of the background plate 100.

[0049] For example, the support member 210 is provided with a sleeve and a telescopic member. The telescopic member is inserted into the sleeve and can move relative to the sleeve in the thickness direction of the background plate 100. The sleeve is fixed on the background plate 100. The light-emitting member 200 is provided on the telescopic member. The telescopic member can be locked or unlocked with the sleeve. For example, when the telescopic member is locked with the sleeve, the telescopic member cannot move relative to the sleeve. When the telescopic member is unlocked from the sleeve, the telescopic member can move relative to the sleeve, thereby driving the light-emitting member 200 to move relative to the background plate 100 in the thickness direction.

[0050] Optionally, the sleeve may be provided with a connecting hole, and the telescopic component may be provided with a plurality of mating holes in sequence along its length. The telescopic component may be locked or unlocked with the sleeve by means of threaded fasteners, mating holes and connecting holes. The length direction of the telescopic component is parallel to the thickness direction of the background plate 100.

[0051] Of course, in some other embodiments, the support member 210 may also be provided with a slide rail, the extension direction of the slide rail is parallel to the thickness direction of the background plate 100, the light-emitting element 200 is connected to the slide rail and can move on the slide rail, thereby adjusting the height of the light-emitting element 200. In order to ensure the connection stability between the light-emitting element 200 and the slide rail, the slide rail can be locked or unlocked with the light source 220.

[0052] Of course, in order to simplify the structure, in some embodiments, the support member 210 is provided with a plurality of connecting parts arranged at intervals along its own extension direction, and the light source 220 is provided with a mating part that can be detachably connected to the connecting parts. The light source 220 can selectively connect to one of the multiple connecting parts to adjust the position of the light source 220 in the extension direction of the support member 210. The connecting parts and the mating parts can be engaged.

[0053] Optionally, in some other embodiments, in order to improve the detection accuracy of the detection module 300 for the defect detection of the test piece 2, it is necessary to ensure the cleanliness of the background plate 100. In some embodiments, the detection device 1 also includes a purging module (not shown), which is used to purge impurities on the background plate 100.

[0054] Understandably, the purging module can be a separate module or integrated into the background plate 100.

[0055] In summary, this utility model embodiment provides a detection device 1, which includes a background plate 100, a light-emitting element 200, and a detection module 300. The background plate 100 is placed below the test piece 2, the light-emitting element 200 illuminates the background plate 100 to project the test piece 201 onto the background plate 100, and the detection module 300 identifies the image of the test piece 2 and its projection 201 on the background plate 100. The detection module 300 can identify edge chipping and slurry leakage defects in the test piece 2 through the image of the test piece 2 and its projection 201 on the background plate 100, thereby improving the detection accuracy of defects.

[0056] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A detection device, characterized in that, include: Background plate (100), the background plate (100) is used to be placed under the test piece (2); A light-emitting element (200) is used to illuminate the background plate (100) so that the test piece (2) is projected (201) onto the background plate (100); The detection module (300) is used to identify the image of the test piece (2) and the projection (201) of the test piece (2) on the background plate (100).

2. The detection device according to claim 1, characterized in that: The detection device further includes a determination module. When the detection module (300) detects that the edge of the projection (201) of the test piece (2) on the background plate (100) has a depression, the determination module determines that the test piece (2) has a chipping defect. If the detection module (300) detects that the edge of the projection (201) of the test piece (2) on the background plate (100) is protruding, the determination module determines that the test piece (2) has a grout leakage defect; When the detection module (300) detects that the edge of the projection (201) of the test piece (2) on the background plate (100) does not show any unevenness and detects that the test piece (2) is missing film color, the determination module determines that the test piece (2) has etching line defects.

3. The detection device according to claim 1, characterized in that: The number of light-emitting elements (200) is multiple and they are arranged at intervals along the circumference of the background plate (100).

4. The detection device according to claim 3, characterized in that: The background plate (100) has four side walls connected end to end in sequence, and each of the four side walls is provided with a light-emitting element (200), the color temperature of the light emitted by the light-emitting element (200) is 4000k.

5. The detection device according to claim 1, characterized in that: The light-emitting element (200) is fixedly connected to the background plate (100).

6. The detection device according to claim 1, characterized in that: The light-emitting element (200) includes a support (210) and a light source (220). The support (210) is disposed on the outer side wall of the background plate (100) and extends along the thickness direction of the background plate (100). The light source (220) and the test piece (2) are located on the same side of the background plate (100). The height distance between the light source (220) and the test piece (2) on the background plate (100) is 20~25mm.

7. The detection device according to claim 6, characterized in that: The support member (210) is detachably connected to the background plate (100).

8. The detection device according to claim 6, characterized in that: The light source (220) is movable relative to the background plate (100) along the thickness direction of the background plate (100).

9. The detection device according to claim 1, characterized in that: The detection device also includes a purging module, which is used to purge impurities on the background plate (100).

10. The detection device according to claim 1, characterized in that: The background panel (100) is a PVC board and a white curtain is provided on the surface of the background panel (100).

Images