Battery cell edge defect point inspection device and point inspection equipment

Abstract

The utility model relates to the technical field of calibration of image sensors, in particular to a cell edge defect point inspection device and point inspection equipment. The cell edge defect point inspection device comprises a point inspection calibration piece and a photosensitive piece, the point inspection calibration piece is used for simulating the appearance of a standard cell, the point inspection calibration piece is provided with a top long edge, a top short edge and a side edge, and at least one of the top long edge, the top short edge and the side edge is provided with an inclined point inspection plane. The spot inspection plane is parallel to the edge of the position where the spot inspection plane is located; the light sensing part is connected to the spot inspection plane, and a calibration pattern is arranged on the surface of the light sensing part and used for calibrating the image sensor. The point inspection plane is arranged on the edge of the point inspection calibration piece, so that the light sensing piece can be connected to the point inspection plane, the image sensor collects the image of the calibration pattern and processes and analyzes the image to obtain the image length value, and the image length value is compared with the actual length value of the calibration pattern to judge the visual precision deviation of the image sensor.

Description

Technical Field

[0001] This application relates to the field of image sensor technology in calibrating automatic optical inspection equipment, specifically to a battery cell edge defect inspection device and inspection equipment. Background Technology

[0002] With the rapid development of electric vehicles and the increasing demands for energy conservation and environmental protection, the production requirements for battery cells, a key component inside electric vehicles, are also becoming increasingly stringent. During the battery cell production process, defects such as scratches, swelling, and dents are inevitable on the cell casing. To ensure product quality, existing technology uses Automated Optical Inspection (AOI) equipment to detect defects on all six sides of the battery cell's appearance, thus filtering out cells with poor appearance. However, after long-term use, the visual inspection accuracy of AOI equipment will deviate, affecting the accuracy of the inspection results. Therefore, it is necessary to perform spot checks and corrections on the vision of AOI equipment. Utility Model Content

[0003] The main technical problem addressed by this application is to provide a battery cell edge defect inspection device and equipment for visual inspection and correction of automatic optical inspection equipment.

[0004] According to a first aspect, one embodiment provides a battery cell edge defect inspection device for calibrating an image sensor in an automated optical inspection device, the battery cell edge defect inspection device comprising:

[0005] A calibration component for simulating the shape of a standard battery cell, the calibration component having a long top edge, a short top edge, and a side edge, at least one of the long top edge, short top edge, and side edge having an inclined calibration plane, the calibration plane being parallel to the edge at the location of the calibration plane; and,

[0006] A photosensitive element is attached to the inspection plane, and the surface of the photosensitive element has a calibration pattern for calibrating the image sensor.

[0007] In some embodiments, the inspection calibration component includes a mounting base, an inspection block, and a locking element;

[0008] The top long edge, top short edge, and side edge are disposed on the mounting base, the inspection plane is disposed on the inspection block, the inspection block is rotatably connected to the mounting base, and is used to adjust the perpendicularity between the inspection plane and the main optical axis of the image sensor. The locking member is used to fix the inspection block.

[0009] In some embodiments, the mounting base has a mounting groove;

[0010] The mounting groove is located at at least one of the top long edge, top short edge, and side edge. The inspection block is rotatably assembled in the mounting groove, and the rotation center of the inspection block is parallel to the edge at the location of the inspection block.

[0011] In some embodiments, the inspection block has a pivot and a locking hole, and the side wall of the mounting groove is provided with a pivot hole and a connecting hole;

[0012] The rotating shaft and the rotating shaft hole are fitted with a clearance, and the inspection block can rotate around the rotating shaft. The locking hole is set as an arc-shaped hole around the rotation direction of the rotating shaft. When the inspection block rotates to the point where the inspection plane is perpendicular to the main optical axis of the image sensor, the locking member passes through the locking hole and connects to the connecting hole to fix the inspection block.

[0013] In some embodiments, the inspection and calibration component further includes a mounting bracket;

[0014] The mounting bracket is connected in the mounting groove of the side edge, and the inspection block located on the side edge is rotatably mounted between the mounting bracket and the mounting base. The locking member fixes the inspection block located on the side edge through its connection with the mounting bracket.

[0015] In some embodiments, the inspection calibration piece has two long top edges, and the inspection planes on the two long top edges are arranged back-to-back with each other; and / or,

[0016] The inspection calibration piece has two short top edges, and the inspection planes on the two short top edges are arranged back-to-back with each other; and / or

[0017] The inspection calibration piece has four side edges, and the inspection planes on the four side edges are arranged back to back.

[0018] In some embodiments, the inspection and calibration component further includes an explosion-proof valve inspection unit;

[0019] The explosion-proof valve inspection section protrudes from the top surface of the inspection and calibration component, and the photosensitive element is connected to the top of the explosion-proof valve inspection section.

[0020] In some embodiments, the calibration pattern on the surface of the photosensitive element includes a plurality of cells arranged in an alternating black and white array, each cell having a preset length value, and the cells are used for post-processing analysis of images acquired by the image sensor.

[0021] In some embodiments, the inspection calibration component further includes a clamping portion;

[0022] The inspection and calibration component has a front and a back side arranged opposite to each other, and the clamping part is recessed on the front and the back side for clamping by the clamping mechanism in the automatic optical inspection equipment.

[0023] According to a second aspect, one embodiment provides an inspection device, comprising:

[0024] The cell edge defect inspection device described in any of the above embodiments; and,

[0025] An automatic optical inspection device has multiple inspection stations, each of which is equipped with multiple image sensors located at different positions. The multiple image sensors located at different positions are used to capture images of the battery cell edge defect inspection device.

[0026] This application establishes an inclined inspection plane on the edge of the inspection calibration piece, allowing the photosensitive element to be connected to the inspection plane. Since the inspection plane is parallel to the edge at its location, the plane containing the calibration pattern on the photosensitive element is also parallel to the edge at that location. When the image sensor captures the calibration pattern on the photosensitive element, it is equivalent to capturing the edge of the inspection calibration piece. The photosensitive element has a calibration pattern, and the image sensor can capture an image of the calibration pattern. The captured image is then processed and analyzed to obtain the image length value. By comparing the image length value with the actual length value on the calibration pattern, it can be determined whether the image sensor produces a visual accuracy deviation when identifying the length value of the edge defect in the tested battery cell. This improves the accuracy of the image sensor, enabling more accurate output of measurement results such as three-dimensional morphological differences and geometric tolerance differences in the detected edge defects of the tested battery cell. During the calibration process, there is no need to install or disassemble the image sensor. The cell edge defect inspection device only needs to be transported normally on the automated optical inspection equipment to complete the image sensor calibration function. This is simple to operate and highly efficient. Furthermore, the cell edge defect inspection device of this application can be reused, thereby reducing the cost of image sensor calibration in automated optical inspection equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the automatic optical inspection equipment in the inspection equipment of this application;

[0028] Figure 2 for Figure 1 A schematic diagram of the front-end inspection device in an automated optical inspection equipment;

[0029] Figure 3 for Figure 1 A schematic diagram of the mid-section inspection device in an automated optical inspection equipment;

[0030] Figure 4 for Figure 1 A schematic diagram of the circulating line inspection device in an automated optical inspection equipment;

[0031] Figure 5 This is a three-dimensional structural diagram of the battery cell edge defect inspection device in the inspection equipment of this application;

[0032] Figure 6 for Figure 5 A structural schematic diagram of the midpoint calibration piece from another perspective;

[0033] Figure 7 for Figure 6 Exploded view of the midpoint calibration piece;

[0034] Figure 8 for Figure 5 A schematic diagram of a calibration pattern in one embodiment of a photosensitive element;

[0035] Figure 9 for Figure 7 Enlarged structural diagram of point A on the midpoint calibration piece;

[0036] Figure 10 for Figure 2 A magnified schematic diagram of section B of the mid-front detection device.

[0037] Figure label:

[0038] 100-Front-end inspection device; 10-First frame; 11-Bar scanning inspection module; 12-Bar scanning NG module; 13-Feeding and handling module; 14-Front-end transfer module; 15-Front-end inspection and handling module; 16-Bottom edge detection module; 17-Transfer positioning module; 18-Side edge and bottom edge detection module; 19-Front-end rotary transfer variable pitch module;

[0039] 200 - Mid-section inspection device; 20 - Second frame; 21 - Mid-section inspection and handling module; 22 - Side appearance inspection module; 23 - Bottom appearance inspection module; 24 - Mid-section transplanting and variable pitch rotation module;

[0040] 300 - Circulation line inspection device; 30 - Third frame; 31 - Circulation line loading module; 32 - Circulation line handling module; 33 - Top surface appearance inspection module; 34 - Large surface appearance inspection module; 35 - Pole post inspection module; 36 - Top surface corner inspection module; 37 - Top surface edge inspection module; 38 - Explosion-proof valve inspection module; 39 - Circulation line loading module;

[0041] 400 - Cell under test;

[0042] 500-Cell edge defect inspection device; 50-Inspection calibration piece; 51-Mounting base; 510-Mounting groove; 511-Top long edge; 512-Side edge; 513-Inspection plane; 514-Spindle hole; 515-Connecting hole; 516-Connecting plate; 52-Photosensitive element; 53-Inspection block; 531-Spindle; 532-Lock hole; 54-Locking element; 55-Mounting bracket; 56-Explosion-proof valve inspection section; 57-Clamping section. Detailed Implementation

[0043] The present application will be further described in detail below with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0044] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0045] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0046] Currently, most battery cells used in electric vehicles are prismatic cells, which have six surfaces: front, back, top, bottom, and two sides. To ensure product quality and safety, the six surfaces of the battery cell, as well as the appearance of the explosion-proof valve and terminals, need to be inspected for defects during the production process. These defects include, but are not limited to, differences in the three-dimensional morphology or geometric tolerances of defects such as bumps, leaks, scratches, dents, and pits. In existing technologies, the visual inspection of battery cells is mostly done manually, which is time-consuming and labor-intensive. Furthermore, the results are highly dependent on the inspector's skills and focus, introducing subjective factors and increasing the risk of missed or incorrect detections. Therefore, automated optical inspection equipment for visual defect inspection of battery cells has emerged. Automated optical inspection equipment uses image sensors such as charge-coupled device (CCD) cameras or complementary metal-oxide-semiconductor (CMOS) cameras to visually inspect the appearance defects of the battery cells. However, after long-term use, the visual accuracy of image sensors such as CCD cameras or CMOS cameras in automated optical inspection equipment will deviate, thereby affecting the reliability and stability of cell appearance defect detection.

[0047] To improve the reliability and stability of cell appearance defect detection, this application provides an inspection device, such as... Figures 1 to 10 As shown, the inspection equipment may include an automatic optical inspection device and a cell edge defect inspection device 500. For example... Figures 1 to 4 As shown, the automatic optical inspection equipment may include a front-end inspection device 100, a middle-end inspection device 200, and a circulation line inspection device 300. The front-end inspection device 100 can be used to inspect the bottom corners, side edges, and bottom edge of the battery cell 400 under test. The middle-end inspection device 200 can be used to inspect the side and bottom appearance of the battery cell 400 under test. The circulation line inspection device 300 can be used to inspect the top, front, and back appearance, terminals, top corners, top edge, and explosion-proof valve of the battery cell 400 under test. However, this application does not impose special restrictions on the testing procedures of the automated optical inspection equipment. For example, in other embodiments, depending on the different settings of the testing process for the battery cell 400 under test, the front-end testing device 100 can also be configured to inspect the top surface appearance, top surface edges, side edges, terminals, and explosion-proof valve of the battery cell 400 under test; the middle-end testing device 200 can also be configured to inspect the bottom surface corners, bottom surface edges, and bottom surface appearance of the battery cell 400 under test; and the circulation line testing device 300 can also be configured to inspect the side edges, side appearance, front appearance, and back appearance of the battery cell 400 under test. The following embodiments will provide a detailed description of the specific structure of the automated optical inspection equipment.

[0048] like Figure 2 As shown, the front-end inspection device 100 may include a first frame 10 and a barcode inspection module 11, a barcode NG module 12, a loading and handling module 13, a front-end transfer module 14, a front-end inspection and handling module 15, a bottom edge detection module 16, a transfer and positioning module 17, a side edge and bottom edge detection module 18, and a front-end rotary transfer variable pitch module 19 mounted on the first frame 10. During inspection, multiple (e.g., four) battery cells 400 to be tested are transported to the barcode inspection module 11 via the loading belt of the logistics line. The barcode inspection module 11 is used to determine whether the QR code on the battery cell 400 to be tested is an NG code. If it is an NG code, the clamping mechanism of the loading and handling module 13 transfers the battery cell 400 to be tested to the barcode NG module 12. The barcode NG module 12 then uses a pull belt to transport the battery cell 400 identified as having an NG code out of the automatic optical inspection equipment. If the code is OK, the clamping mechanism of the loading and handling module 13 transfers the battery cell 400 under test to the front-end transfer module 14. The clamping mechanism on the front-end transfer module 14 clamps multiple battery cells 400 under test and transfers them to the front-end detection and handling module 15 via a linear screw module. During the transfer process, the center distance between the multiple battery cells 400 under test is increased by the linear screw module to meet the requirements of the bottom edge detection module 16 for the spacing of the multiple battery cells 400 under test. The left actuator of the linear motor in the front-end inspection and handling module 15 clamps multiple battery cells 400 to be tested and transfers them to the bottom edge detection module 16, where the bottom edge of each battery cell 400 is detected. After detection, the battery cells 400 are transferred to the intermediate positioning module 17. The right actuator of the linear motor in the front-end inspection and handling module 15 clamps multiple battery cells 400 to be tested and transfers them to the side edge and bottom edge detection module 18, where the side edge and bottom edge of each battery cell 400 are detected. After detection, the battery cells 400 are transferred to the front-end rotary transfer and pitch-changing module 19. The multiple battery cells 400 to be tested complete a 90-degree rotation and pitch change on the clamping mechanism of the front-end rotary transfer and pitch-changing module 19 to reduce the center distance between the multiple battery cells 400 to be tested. Finally, the multiple battery cells 400 to be tested are transferred to the intermediate inspection device 200.

[0049] like Figure 3As shown, the mid-section inspection device 200 may include a second frame 20 and a mid-section inspection and handling module 21, a side appearance inspection module 22, a bottom appearance inspection module 23, and a mid-section transfer and variable pitch rotation module 24 mounted on the second frame 20. Multiple cells 400 to be tested, after being transferred to the mid-section inspection device 200, are transferred to the mid-section inspection and handling module 21 via a linear screw module. Since the multiple cells 400 to be tested have already undergone a 90-degree rotation and pitch change on the clamping mechanism of the front-section rotary transfer and variable pitch module 19, the images of the cells 400 to be tested by the side appearance inspection module 22 and the bottom appearance inspection module 23 are composited and reduced. The linear motor clamping mechanism of the mid-section inspection and handling module 21 clamps the multiple cells 400 to be tested and sequentially passes through the side appearance inspection module 22 and the bottom appearance inspection module 23 at a uniform speed, thereby completing the side and bottom appearance inspections of the cells 400 to be tested. Subsequently, the clamping mechanism of the mid-section transplanting pitch-changing rotating module 24 clamps multiple test cells 400 and completes the pitch change and rotation of multiple test cells 400 through a four-moving linear motor equipped with a direct drive motor (DD). Finally, the multiple test cells 400 are transferred to the circulating line detection device 300.

[0050] like Figure 4 As shown, the circulating line testing device 300 includes a third frame 30 and a circulating line loading module 31, a circulating line handling module 32, a top surface appearance inspection module 33, a large surface appearance inspection module 34, a terminal post inspection module 35, a top surface corner inspection module 36, a top surface edge inspection module 37, an explosion-proof valve inspection module 38, and a circulating line loading module 39 mounted on the third frame 30. Multiple cells 400 to be tested, after being transferred to the circulating line testing device 300, are transferred by the clamping mechanism of the circulating line loading module 31 to the trolley fixture of the circulating line handling module 32. The trolley fixture, carrying multiple cells 400 to be tested, sequentially passes through the top surface appearance inspection module 33, the large surface appearance inspection module 34, and the terminal post inspection module 35 to complete the inspection. Subsequently, the trolley fixture transfers multiple battery cells 400 to be tested to the top edge detection module 36, the top edge detection module 37, and the explosion-proof valve detection module 38 via the circulating line transfer axis to complete the testing. Finally, the trolley fixture unloads the battery cells 400 into the circulating line feeding module 39. The clamping mechanism of the circulating line feeding module 39 clamps multiple battery cells 400 to be tested and transfers them to the OK logistics line or the NG logistics line for subsequent production processes.

[0051] Among them, the bottom edge detection module 16, side edge and bottom edge detection module 18, side appearance detection module 22, bottom appearance detection module 23, top appearance detection module 33, large surface appearance detection module 34, pole post detection module 35, top edge detection module 36, top edge detection module 37, and explosion-proof valve detection module 38, the equipment used to detect appearance defects of the battery cell 400 under test can use image sensors such as CCD cameras or CMOS cameras. This application does not impose any special restrictions on the specific type of image sensor in the automatic optical inspection equipment. In order to improve the visual accuracy of the image sensor, it is necessary to periodically calibrate the image sensor in the automatic optical inspection equipment to calibrate the visual accuracy of the image sensor. To this end, this application also provides a battery cell edge defect inspection device 500. This device 500 is used to capture images through an image sensor in an automated optical inspection device. The image sensor acquires and processes the images to obtain an image length value. This image length value is then compared with the actual length value displayed on the device 500 to obtain the visual accuracy deviation of the image sensor. Image sensors with visual accuracy deviations that do not meet the requirements are adjusted, thereby calibrating the image sensor in the automated optical inspection device.

[0052] The following embodiments will provide a detailed description of the specific structure of the battery cell edge defect inspection device 500. For example... Figures 5 to 7 As shown, the battery cell edge defect inspection device 500 may include an inspection calibration component 50 and a photosensitive component 52. The inspection calibration component 50 is used to simulate the shape of a standard battery cell. A standard battery cell refers to a battery cell without defects such as bumps, scratches, dents, or pits. Depending on the size of the different battery cells 400 to be tested, the inspection calibration component 50 may have different dimensions. This application does not impose any special restrictions on the specific dimensions of the inspection calibration component 50. The shape of the inspection calibration component 50 may be set as a cuboid with a length direction, a thickness direction, and a height direction. For ease of description, the X direction will be used as the length direction of the inspection calibration component 50, the Y direction as the thickness direction, and the Z direction as the height direction. Therefore, the top of the calibration component 50 has a long top edge 511 and a short top edge (not shown in the figure), and the side of the calibration component 50 has a side edge 512. At least one of the long top edge 511, the short top edge, and the side edge 512 has an inclined calibration plane 513, which is parallel to the edge at the location of the calibration plane 513. The photosensitive element 52 is connected to the calibration plane 513, and the surface of the photosensitive element 52 is provided with a calibration pattern for calibrating the image sensor.

[0053] When it is necessary to calibrate the image sensor in the side edge and bottom edge detection module 18 used to detect the side edge 512 of the battery cell 400 under test, the clamping mechanism in the automatic optical inspection equipment can clamp the inspection calibration piece 50, so that the photosensitive element 52 on the side edge 512 of the inspection calibration piece 50 faces the image sensor used to detect the side edge 512 of the battery cell 400 under test, and is located within the depth of field of the image sensor. The image sensor takes a picture of the calibration pattern on the photosensitive element 52 to acquire an image, and then processes and analyzes the acquired image to obtain the image length value. By comparing the actual length value of the calibration pattern on the photosensitive element 52 with the processed and analyzed image length value, it can be determined whether the image sensor in the side edge and bottom edge detection module 18 has a visual accuracy deviation. Similarly, when it is necessary to calibrate the image sensor in the top edge detection module 37, the clamping mechanism in the automatic optical inspection equipment can clamp the calibration piece 50, so that the photosensitive elements 52 on the top long edge 511 and top short edge of the calibration piece 50 face the image sensor in the top edge detection module 37 and are within the depth of field of the image sensor. The image sensor captures an image of the calibration pattern on the photosensitive element 52, and then processes and analyzes the captured image to obtain the image length value. By comparing the actual length value of the calibration pattern on the photosensitive element 52 with the processed and analyzed image length value, it can be determined whether the image sensor in the top edge detection module 37 has a visual accuracy deviation. If the image sensor in any of the above modules has a visual accuracy deviation, the corresponding image sensor is adjusted to calibrate the image sensor.

[0054] This application provides an inclined inspection plane 513 on the edge of the inspection calibration piece 50, allowing the photosensitive element 52 to be connected to the inspection plane 513. Since the inspection plane 513 is parallel to the edge at its location, the plane containing the calibration pattern on the photosensitive element 52 is also parallel to the edge at its location. When the image sensor captures the calibration pattern on the photosensitive element 52, it is equivalent to the image sensor capturing the edge of the inspection calibration piece 50. Since the photosensitive element 52 has a calibration pattern, the image sensor can capture an image of the calibration pattern, process and analyze the captured image to obtain the image length value. By comparing the image length value with the actual length value on the calibration pattern, it can be determined whether the image sensor produces a visual accuracy deviation when identifying the length value of the edge defect of the tested battery cell 400, thereby improving the accuracy of the image sensor and more accurately outputting measurement results such as the three-dimensional morphological differences and geometric tolerance differences of the detected edge defects of the tested battery cell 400. During the calibration process, there is no need to install or disassemble the image sensor. The cell edge defect inspection device 500 simply needs to be transported normally on the automated optical inspection equipment to complete the image sensor calibration function. This is simple to operate and highly efficient. Furthermore, the cell edge defect inspection device 500 of this application can be reused, thereby reducing the cost of image sensor calibration in automated optical inspection equipment.

[0055] Among them, such as Figure 8 As shown, the calibration pattern on the surface of the photosensitive element 52 may include multiple cells arranged in an alternating black and white array. Each cell has a preset length value, and the cells are used for post-processing analysis of images acquired by the image sensor. For example, the cells may be square cells, and the preset side length of the cells can be set according to the required calibration accuracy of the image sensor. The photosensitive element 52 can be cut to the same size as the inspection plane 513 and mounted on the inspection plane 513 by means of pasting or insertion. Taking a preset side length of 1mm for each cell as an example, when the image sensor captures an image of the photosensitive element 52, if the image length value obtained by processing and analyzing 5 cells in the image captured by the image sensor is 4.9mm, it indicates that the image sensor has a visual error of 0.1mm. In this case, if the required calibration accuracy of the image sensor is higher than 0.1mm, the image sensor needs to be adjusted to meet the calibration accuracy requirements. If the required calibration accuracy of the image sensor is lower than 0.1mm, no adjustment of the image sensor is required. This application does not impose special restrictions on the required calibration accuracy of the image sensor or the preset side length of the cells in the calibration pattern.

[0056] In other embodiments, the calibration pattern on the photosensitive element 52 may further include multiple circles of equal diameter arranged tangentially in an array. Taking a preset diameter of 1 mm as an example, when the image sensor captures an image of the photosensitive element 52, if the image length obtained by processing and analyzing five circles in the captured image is 4.9 mm, it indicates a visual error of 0.1 mm in the image sensor. In this case, if the required calibration accuracy of the image sensor is higher than 0.1 mm, the image sensor needs to be adjusted to meet the calibration accuracy requirements. If the required calibration accuracy of the image sensor is lower than 0.1 mm, no adjustment is needed. Furthermore, multiple cells in the calibration pattern may have different preset side lengths, or multiple circles in the calibration pattern may have different preset diameters, allowing the image sensor to capture images with different preset side lengths or preset diameters and compare the captured image length values ​​with the actual length values ​​on the calibration pattern to improve the calibration accuracy of the image sensor. It should be noted that in the above embodiments, the material of the photosensitive element 52 can be film or photographic paper, etc. This application does not impose any special restrictions on the specific material of the photosensitive element 52 or the specific shape of the marking pattern on the photosensitive element 52.

[0057] To improve the accuracy of the calibration component 50 in calibrating the image sensor, the calibration plane 153 in the calibration component 50 can also be configured as a rotatable structure, so that the plane containing the photosensitive element 52 can be perpendicular to the principal optical axis of the image sensor, thereby improving the clarity of the image sensor during image capture. Specifically, as follows... Figure 6 , Figure 7 and Figure 9As shown, the calibration component 50 may include a mounting base 51, a calibration block 53, and a locking element 54. A top long edge 511, a top short edge, and a side edge 512 are disposed on the mounting base 51. A calibration plane 513 is disposed on the calibration block 53, which is rotatably connected to the mounting base 51 for adjusting the perpendicularity between the calibration plane 513 and the main optical axis of the image sensor. The locking element 54 is used to fix the calibration block 53. By providing a rotatable calibration block 53 on the mounting base 51, the calibration plane 513 on the calibration block 53 can be deflected at a certain angle relative to the calibration component 50. In this way, when calibrating the image sensor, the deflection angle of the calibration block 53 can be adjusted, allowing the main optical axis of the image sensor to capture images of the photosensitive element 52 at an angle perpendicular to the calibration plane 513. This improves the clarity of the image sensor during image capture and reduces errors during image capture. However, this application does not impose any special restrictions on whether the inspection and calibration component 50 is provided with a rotatable inspection block 53. For example, in other embodiments, the inspection plane 513 can also be directly set on the mounting base 51 in an inclined manner. When the image sensor needs to be calibrated, the angle between the inspection plane 513 and the main optical axis of the image sensor can be adjusted by controlling the deflection angle of the clamping mechanism.

[0058] In some embodiments, such as Figure 6 , Figure 7 and Figure 9 As shown, the mounting base 51 may have a mounting groove 510; the mounting groove 510 may be located at at least one of the top long edge 511, the top short edge, and the side edge 512. The inspection block 53 is rotatably mounted in the mounting groove 510, and the rotation center of the inspection block 53 is parallel to the edge at the location of the inspection block 53. The mounting groove 510 not only provides a mounting position for the inspection block 53, but also allows the inspection plane 513 to be closer to the edge at the location of the inspection plane 513 when the inspection block 53 rotates in the mounting groove 510. This makes the image sensor more closely approximate the actual edge on the mounting base 51 when capturing images of the photosensitive element 52 on the inspection plane 513, thereby improving the accuracy of the image sensor's capture. However, this application does not impose any special restrictions on whether the mounting base 51 has a mounting groove 510. For example, in other embodiments, the inspection block 53 may also be directly mounted on the edge of the mounting base 51 via a support, with a rotatable connection between the inspection block 53 and the support. When the image sensor needs to be calibrated, the rotation angle of the inspection block 53 can be adjusted directly on the support.

[0059] When the mounting base 51 has a mounting slot 510, such as Figure 9As shown, the inspection block 53 may have a rotating shaft 531 and a locking hole 532; the side wall of the mounting groove 510 may be provided with a rotating shaft hole 514 and a connecting hole 515. The rotating shaft 531 and the rotating shaft hole 514 are clearance-fitted, allowing the inspection block 53 to rotate around the rotating shaft 531. The locking hole 532 can be set as an arc-shaped hole around the rotating shaft 531. When the inspection block 53 rotates to the point where the inspection plane 513 is perpendicular to the main optical axis of the image sensor, the locking member 54 passes through the locking hole 532 and connects to the connecting hole 515 to fix the inspection block 53. When it is necessary to adjust the deflection angle of the inspection block 53, simply loosen the locking member 54, rotate the inspection block 53 to a position perpendicular to the main optical axis of the image sensor, and the locking member 54 can swing within the arc-shaped locking hole 532. Finally, the locking member 54 is fixed in the connecting hole 515 to complete the adjustment of the inspection block 53. The rotating shaft 531 can be either a cylindrical shaft passing through the inspection block 53 or a short cylindrical shaft connected to the inspection block 53. The locking element 54 can be either a screw threaded to the inspection calibration element 50 or a snap-fit ​​structure connected to the inspection calibration element 50. This application does not impose any special restrictions on the specific structure of the rotating shaft 531 and the locking element 54.

[0060] It is understandable that, such as Figure 7As shown, the connection structure between the inspection block 53 and the inspection calibration component 50 can vary depending on the location of the mounting groove 510 on the inspection calibration component 50. For example, when the mounting groove 510 is located on the long top edge 511, the shaft 531 and the locking element 54 can be connected to the side walls on both sides of the mounting groove 510 along the X direction because the long top edge 511 is relatively long. When the mounting groove 510 is located on the short top edge, the entire short top edge can be used as the mounting groove 510 because the short top edge is relatively short. At the same time, a connecting plate 516 located in the XZ plane is provided in the mounting groove 510, so that the shaft 531 and the locking element 54 can be connected to the connecting plate 516 along the Y direction. When the mounting slot 510 is located on the side edge 512, the inspection and calibration component 50 may further include a mounting bracket 55. The mounting bracket 55 is connected within the mounting slot 510 of the side edge 512. The inspection block 53 located on the side edge 512 is rotatably mounted between the mounting bracket 55 and the mounting base 51. The locking member 54 fixes the inspection block 53 located on the side edge 512 through its connection with the mounting bracket 55, thereby allowing the rotating shaft 531 and the locking member 54 to be connected along the Z direction between the mounting bracket 55 and the inspection and calibration component 50. The mounting bracket 55 may be made of angle steel. One side of the mounting bracket 55 is fixed to the side wall of the mounting slot 510 along the X direction, and the other side of the mounting bracket 55 is used to support the inspection block 53. This application does not impose special restrictions on the specific structure of the inspection and calibration component 50 connected to the mounting slot 510 at different locations. For example, in other embodiments, a mounting bracket 55 may also be provided in the mounting groove 510 on the top long edge 511, or two connecting plates 516 in the XZ plane may be provided in the mounting groove 510 on the top short edge along the Y direction. The two connecting plates 516 are respectively provided at both ends of the mounting groove 510 along the Y direction to facilitate the connection of the rotating shaft 531 and the locking member 54.

[0061] In this embodiment, a portion of the top long edge 511 and the side edge 512 is configured as a mounting groove 510, leaving the other portion of the top long edge 511 and the side edge 512 still visible. The entire top short edge is configured as a mounting groove 510, making the top short edge invisible. In other embodiments, when the thickness of the inspection and calibration component 50 in the Y direction is sufficiently thick, a portion of the top short edge may also be configured as a mounting groove 510. This application does not impose any special limitations on the specific shape of the mounting groove 510 formed on the mounting base 51.

[0062] In some embodiments, such as Figure 5 and Figure 6As shown, the two long top edges 511, two short top edges, and four side edges 512 of the inspection calibration component 50 may all have the aforementioned inspection planes 513, or may only have some of the aforementioned inspection planes 513. For example, the inspection calibration component 50 has two long top edges 511, and the inspection planes 513 on the two long top edges 511 are arranged back-to-back with each other; and / or, the inspection calibration component 50 has two short top edges, and the inspection planes 513 on the two short top edges are arranged back-to-back with each other; and / or, the inspection calibration component 50 has four side edges 512, and the inspection planes 513 on the four side edges 512 are arranged back-to-back with each other. Figure 10 As shown, taking the side edge and bottom edge detection module 18 as an example, the four image sensors in the side edge and bottom edge detection module 18 used to detect the side edges 512 and bottom edges of the battery cell 400 under test can be centrally arranged around the battery cell 400 under test. In this way, the four image sensors can be centrally arranged to form a detection station, which is beneficial to reducing the size of the automatic optical inspection equipment. At the same time, inspection planes 513 are provided on the two long top edges 511, the two short top edges, and the four side edges 512 of the inspection calibration component 50, so that when the battery cell edge defect inspection device 500 moves to the corresponding detection station, the four image sensors located in different positions can simultaneously photograph the photosensitive elements 52 at different positions on the inspection calibration component 50, thereby improving the efficiency of image sensor calibration. Similarly, Figure 4 The image sensors in the top edge detection module 37, which are used to detect the long edge 511 and the short edge of the top of the battery cell 400 under test, can be centrally set on the top of the battery cell 400 to form a detection station for detecting the top edge of the battery cell 400 under test. This will not be described in detail here.

[0063] It should be noted that when the inspection planes 513 located on the two long top edges 511, two short top edges, and four side edges 512 of the inspection and calibration component 50 are configured as rotatable inspection block 53 structures, due to potential angular deviations in the image sensor during installation, the principal optical axes of multiple image sensors at the same station in the automatic optical inspection equipment may not necessarily have the same tilt angle. This application addresses this by configuring the inspection planes 513 as rotatable inspection block 53 structures, allowing photosensitive elements 52 at different positions on the same inspection and calibration component 50 to rotate to different deflection angles. This ensures that the plane containing each photosensitive element 52 is perpendicular to the principal optical axis of the corresponding image sensor, thus avoiding the situation where some inspection planes 513 are perpendicular to the principal optical axis of the corresponding image sensor while others are not, due to the inspection planes 513 being fixed to the inspection and calibration component 50. This improves the accuracy of image sensor calibration.

[0064] In addition, such as Figure 5 and Figure 6 As shown, two inspection planes 513 can be provided on the same top long edge 511 of the inspection calibration component 50. The two inspection planes 513 are spaced apart and close to the inspection planes 513 located on the two top short edges. Since the top long edge 511 of the battery cell 400 under test is relatively long, in order to improve the visual accuracy of the image sensor used to detect the top long edge 511 of the battery cell 400 under test, two inspection planes 513 are spaced apart on the same top long edge 511 of the inspection calibration component 50. This allows the image sensor to perform re-inspection based on the calibration results of the two inspection planes 513, thereby improving the visual accuracy of the image sensor calibration.

[0065] In some embodiments, such as Figure 5 and Figure 6 As shown, the inspection calibration component 50 may also have an explosion-proof valve inspection section 56; the explosion-proof valve inspection section 56 protrudes from the top surface of the inspection calibration component 50 and is located between two inspection planes 53 provided on the top long edge 511, and a photosensitive element 52 is connected to the top of the explosion-proof valve inspection section 56. When the inspection calibration component 50 moves to the explosion-proof valve detection module 38 in the automatic optical inspection equipment, the image sensor in the explosion-proof valve detection module 38 can take pictures and acquire images of the photosensitive element 52 on the explosion-proof valve inspection section 56, and then process and analyze the acquired images to obtain the image length value. By comparing the actual length value of the calibration pattern on the photosensitive element 52 with the processed and analyzed image length value, it can be determined whether the image sensor in the explosion-proof valve detection module 38 has a visual accuracy deviation. If the image sensor has a visual accuracy deviation, the corresponding image sensor is adjusted to complete the image sensor calibration.

[0066] To better fix the calibration point of part 50, such as Figure 6 and Figure 7As shown, the calibration component 50 may also have a clamping portion 57; the calibration component 50 has a front and a back side disposed opposite to each other, and the clamping portion 57 is recessed on the front and back sides for clamping by a clamping mechanism in an automated optical inspection device. When clamping the calibration component 50, the clamping mechanism can be positioned by the recessed surface, thereby ensuring a fixed position when clamping any calibration component 50, reducing errors caused by different clamping positions of the calibration component 50 during image sensor calibration. In other embodiments, the clamping portion 57 may also be a protruding structure located on the front and back sides of the calibration component 50, and the clamping mechanism may be provided with a concave structure adapted to the protruding structure, thereby clamping the calibration component 50 in a fixed position. Alternatively, the clamping portion 57 may also be a magnetic attraction structure located on the front and back sides of the calibration component 50, thereby allowing the clamping mechanism to magnetically attach the calibration component 50 to a fixed position. This application does not impose any special limitations on the specific structure of the clamping portion 57 on the calibration component 50.

[0067] For the clamping mechanism in the automated optical inspection equipment, it can be configured as a rotary clamping mechanism. This rotary clamping mechanism can clamp and flip the inspection calibration component 50, allowing the photosensitive elements 52 on the top long edge 511 and top short edge of the inspection calibration component 50 to face the image sensor in the side edge and bottom edge detection module 18 used to detect the bottom edge of the battery cell 400 under test. This allows the photosensitive elements 52 on the top long edge 511 and top short edge of the inspection calibration component 50 to also be used to calibrate the image sensor detecting the bottom edge of the battery cell 400 under test. Furthermore, in other embodiments, if the automated optical inspection equipment does not have a rotary clamping mechanism, a rotatable robotic arm can be installed near the image sensor station to be calibrated. The robotic arm clamps the inspection calibration component 50 and calibrates the image sensor. This application does not impose any special restrictions on whether the automated optical inspection equipment has a rotary clamping mechanism.

[0068] The above embodiments provide a detailed description of the specific structure of the battery cell edge defect inspection device 500. In order to better demonstrate the content of this application, the following embodiments will provide a detailed description of the specific method for calibrating an image sensor using the battery cell edge defect inspection device 500 in an automatic optical inspection equipment.

[0069] 1. Calibrate the image sensor used to detect the top edge of the 400 battery cell under test.

[0070] 1. Static Imaging: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the imaging point in the top edge detection module 37. The image sensor in the top edge detection module 37 takes one image each of the top long edge 511 and the top short edge of the calibration piece 50 to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, keeping the position of the calibration piece 50 fixed, the image sensor takes multiple images (e.g., 10 times) of the fixed position of the captured cell in the calibration pattern to complete the static repeatability inspection and verification of the top long edge 511 and the top short edge.

[0071] 2. Dynamic Imaging: The clamping mechanism in the automatic optical inspection equipment moves the calibration piece 50 to the imaging point in the top edge detection module 37. The image sensor in the top edge detection module 37 takes one image each of the top long edge 511 and the top short edge of the calibration piece 50 to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, the clamping mechanism moves the calibration piece 50 back to the imaging point, and the image sensor takes another image of the fixed position of the captured cell in the calibration pattern. This process is repeated multiple times (e.g., 10 times) to complete the dynamic repeatability inspection and verification of the top long edge 511 and the top short edge.

[0072] 3. Length Measurement: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the shooting point in the top edge detection module 37. The image sensor in the top edge detection module 37 takes a picture of the top long edge 511 and the top short edge of the calibration piece 50 once each to capture the preset length value in the calibration pattern on the photosensitive element 52. For example, 1mm (one cell), 2mm (two cells), 3mm (three cells), 4mm (four cells), and 5mm (five cells) in black and white cells to complete the length measurement and verification of the top long edge 511 and the top short edge.

[0073] II. Calibration of the image sensor used to detect the 400-sided edge of the battery cell under test.

[0074] 1. Static Imaging: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the imaging point in the side edge and bottom edge detection module 18. The image sensor in the side edge and bottom edge detection module 18 takes a picture of the side edge 512 of the calibration piece 50 once to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, keeping the position of the calibration piece 50 fixed, the image sensor takes multiple pictures (e.g., 10 times) of the fixed position of the captured cell in the calibration pattern to complete the static repeatability inspection and verification of the side edge 512.

[0075] 2. Dynamic Imaging: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the imaging point in the side edge and bottom edge detection module 18. The image sensor in the side edge and bottom edge detection module 18 takes a picture of the side edge 512 of the calibration piece 50 once to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, the clamping mechanism holds the calibration piece 50, moves it, and returns it to the imaging point. The image sensor then takes another picture of the fixed position of the captured cell in the calibration pattern. This process is repeated multiple times (e.g., 10 times) to complete the dynamic repeatability inspection and verification of the side edge 512.

[0076] 3. Length Measurement: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the shooting point in the side edge and bottom edge detection module 18. The image sensor in the side edge and bottom edge detection module 18 takes a picture of the side edge 512 of the calibration piece 50 once to capture the preset length value in the calibration pattern on the photosensitive element 52. For example, 1mm (one cell), 2mm (two cells), 3mm (three cells), 4mm (four cells), and 5mm (five cells) in black and white cells to complete the length measurement and verification of the side edge 512.

[0077] III. Calibrate the image sensor used to detect the bottom edge of the 400-cell battery under test.

[0078] 1. Static Imaging: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the imaging point in the side edge and bottom edge detection module 18. The clamping mechanism flips the calibration piece 50 so that the inspection planes 513 on the top long edge 511 and top short edge face the image sensor used to detect the bottom edge of the battery cell 400 under test. The image sensor in the side edge and bottom edge detection module 18 takes a picture of the top long edge 511 and top short edge of the calibration piece 50 once to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, keeping the position of the calibration piece 50 fixed, the image sensor takes multiple pictures (e.g., 10 times) of the fixed position of the captured cell in the calibration pattern to complete the static repeatability inspection and verification of the bottom edge.

[0079] 2. Dynamic Imaging: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the imaging point in the side edge and bottom edge detection module 18. The clamping mechanism flips the calibration piece 50 so that the inspection planes 513 on the top long edge 511 and top short edge face the image sensor used to detect the bottom edge of the battery cell 400 under test. The image sensor in the side edge and bottom edge detection module 18 takes a picture of the top long edge 511 and top short edge of the calibration piece 50 once to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, the clamping mechanism holds the calibration piece 50, moves it, and returns it to the imaging point. The image sensor then takes another picture of the fixed position of the captured cell in the calibration pattern. This process is repeated multiple times (e.g., 10 times) to complete the dynamic repeatability inspection and verification of the bottom edge.

[0080] 3. Length Measurement: The clamping mechanism in the automatic optical inspection equipment holds the calibration piece 50 and moves it to the shooting point in the side edge and bottom edge detection module 18. The clamping mechanism flips the calibration piece 50 so that the inspection planes 513 on the top long edge 511 and top short edge face the image sensor used to detect the bottom edge of the battery cell 400 under test. The image sensor in the side edge and bottom edge detection module 18 takes a picture of the top long edge 511 and top short edge of the calibration piece 50 once to capture the preset length value in the calibration pattern on the photosensitive element 52. For example, 1mm (one cell), 2mm (two cells), 3mm (three cells), 4mm (four cells), and 5mm (five cells) in black and white cells to complete the length measurement and verification of the bottom edge.

[0081] IV. Calibrate the image sensor used to detect the 400 explosion-proof valve of the battery cell under test.

[0082] 1. Static Imaging: The clamping mechanism in the automatic optical inspection equipment holds the inspection calibration piece 50 and moves it to the imaging point in the explosion-proof valve detection module 38. The image sensor in the explosion-proof valve detection module 38 takes a picture of the explosion-proof valve inspection section 56 of the inspection calibration piece 50 once to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, keeping the position of the inspection calibration piece 50 fixed, the image sensor takes multiple pictures (e.g., 10 times) of the fixed position of the captured cell in the calibration pattern to complete the static repeatability inspection verification of the explosion-proof valve inspection section 56.

[0083] 2. Dynamic Imaging: The clamping mechanism in the automatic optical inspection equipment holds the inspection calibration piece 50 and moves it to the imaging point in the explosion-proof valve inspection module 38. The image sensor in the explosion-proof valve inspection module 38 takes a picture of the explosion-proof valve inspection section 56 of the inspection calibration piece 50 once to capture a fixed position of a cell in the calibration pattern on the photosensitive element 52. Subsequently, the clamping mechanism holds the inspection calibration piece 50, moves it, and returns it to the imaging point. The image sensor then takes another picture of the fixed position of the captured calibration pattern cell. This process is repeated multiple times (e.g., 10 times) to complete the dynamic repeatability inspection verification of the explosion-proof valve inspection section 56.

[0084] 3. Length Measurement: The clamping mechanism in the automatic optical inspection equipment holds the inspection calibration piece 50 and moves it to the shooting point in the explosion-proof valve detection module 38. The image sensor in the explosion-proof valve detection module 38 takes a picture of the explosion-proof valve inspection section 56 of the inspection calibration piece 50 once to capture the preset length value in the marking pattern on the photosensitive element 52. For example, 1mm (one cell), 2mm (two cells), 3mm (three cells), 4mm (four cells), and 5mm (five cells) in black and white cells to complete the length measurement and inspection verification of the explosion-proof valve inspection section 56.

[0085] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A device for inspecting defects on the edge of a battery cell, characterized in that, The battery cell edge defect inspection device is used for calibrating image sensors in automated optical inspection equipment and includes: A calibration component for simulating the shape of a standard battery cell, the calibration component having a long top edge, a short top edge, and a side edge, at least one of the long top edge, short top edge, and side edge having an inclined calibration plane, the calibration plane being parallel to the edge at the location of the calibration plane; and, A photosensitive element is attached to the inspection plane, and the surface of the photosensitive element has a calibration pattern for calibrating the image sensor.

2. The device of claim 1, wherein the device further comprises a plurality of rollers. The inspection and calibration components include a mounting base, an inspection block, and a locking component; The top long edge, top short edge, and side edge are disposed on the mounting base, the inspection plane is disposed on the inspection block, the inspection block is rotatably connected to the mounting base, and is used to adjust the perpendicularity between the inspection plane and the main optical axis of the image sensor. The locking member is used to fix the inspection block.

3. The device of claim 2, wherein the device further comprises a light source and a camera. The mounting base has a mounting groove; The mounting groove is located at at least one of the top long edge, top short edge, and side edge. The inspection block is rotatably assembled in the mounting groove, and the rotation center of the inspection block is parallel to the edge at the location of the inspection block.

4. The device of claim 3, wherein the device further comprises a light source. The inspection block has a rotating shaft and a locking hole, and the side wall of the mounting groove is provided with a rotating shaft hole and a connecting hole; The rotating shaft and the rotating shaft hole are fitted with a clearance, and the inspection block can rotate around the rotating shaft. The locking hole is set as an arc-shaped hole around the rotation direction of the rotating shaft. When the inspection block rotates to the point where the inspection plane is perpendicular to the main optical axis of the image sensor, the locking member passes through the locking hole and connects to the connecting hole to fix the inspection block.

5. The device of claim 3, wherein the device further comprises a light source. The inspection and calibration components also include a mounting bracket; The mounting bracket is connected in the mounting groove of the side edge, and the inspection block located on the side edge is rotatably mounted between the mounting bracket and the mounting base. The locking member fixes the inspection block located on the side edge through its connection with the mounting bracket.

6. The device of claim 1, wherein the device is configured to detect the edge defect of the battery cell by using a camera. The inspection calibration piece has two long top edges, and the inspection planes on the two long top edges are arranged back-to-back with each other; and / or, The inspection calibration piece has two short top edges, and the inspection planes on the two short top edges are arranged back-to-back with each other; and / or The inspection calibration piece has four side edges, and the inspection planes on the four side edges are arranged back to back.

7. The device of claim 6, wherein the device further comprises a light source. The inspection and calibration component also includes an explosion-proof valve inspection section; The explosion-proof valve inspection section protrudes from the top surface of the inspection and calibration component, and the photosensitive element is connected to the top of the explosion-proof valve inspection section.

8. The device according to any one of claims 1 to 7, wherein The calibration pattern on the surface of the photosensitive element includes multiple cells arranged in an alternating black and white array. Each cell has a preset length value and is used for post-processing analysis of images acquired by the image sensor.

9. The cell edge defect inspection device according to any one of claims 1 to 7, characterized in that, The inspection and calibration component also has a clamping part; The point inspection calibration piece has oppositely arranged front and back surfaces, and the clamping portions are recessed on the front and back surfaces for clamping by a clamping mechanism in the automatic optical inspection equipment.

10. An inspection device characterized by comprising: Comprise: The electric cell edge defect point inspection device according to any one of claims 1 to 9; And, The automatic optical inspection equipment has a plurality of detection stations, each of which is provided with a plurality of image sensors at different orientations, and the image sensors at different orientations are used to shoot the electric cell edge defect point inspection device respectively.

Images