A power battery negative electrode nickel sheet appearance detection device

Abstract

The utility model discloses a kind of power battery negative pole nickel sheet appearance detection devices, including transparent conveying carousel, first nickel sheet detection station, second nickel sheet detection station, third nickel sheet detection station, fourth nickel sheet detection station and fifth nickel sheet detection station are equipped on transparent conveying carousel, first nickel sheet detection station is equipped with the camera detection component one of detecting the flatness of nickel sheet surface, second nickel sheet detection station and fourth nickel sheet detection station are respectively equipped with the camera detection component two and the camera detection component four of detecting the appearance defect of nickel sheet reverse side, third nickel sheet detection station and fifth nickel sheet detection station are respectively equipped with the camera detection component three and the camera detection component five of detecting the appearance defect of nickel sheet front side.The device utilizes six camera detection components to carry out multi-angle shooting to the front and back of nickel sheet, detects the front, back and flatness defect of nickel sheet, not only comprehensive detection, but also high detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of battery negative electrode detection technology, and in particular relates to a device for inspecting the appearance of nickel sheet negative electrode of power battery. Background Technology

[0002] Nickel sheets are a key structural component of the negative electrode in automotive power batteries, and their appearance quality directly affects product performance and reliability. Currently, the appearance inspection of nickel sheets mainly relies on manual labor. Influenced by the experience and subjective judgment of quality inspectors, the rate of missed defects and false positives is high, resulting in unstable inspection quality and difficulty in meeting the quality control requirements of large-scale, high-precision production. While conventional 3D inspection methods can reduce human interference, the flatness requirement of nickel sheets is within 0.1mm, which significantly reduces the overall inspection speed of the equipment. Furthermore, nickel caps are prone to cracking during the stamping process, and the small distance between two caps makes crack defects inconspicuous and difficult to detect. Summary of the Invention

[0003] The main purpose of this invention is to provide an appearance inspection device for nickel sheets of negative electrode in power batteries. This device uses six camera detection components to take multi-angle pictures of the front and back of the nickel sheet, and to detect defects in the front, back and flatness of the nickel sheet. It is not only comprehensive in its detection, but also highly efficient.

[0004] To address this, the present invention provides a device for inspecting the appearance of nickel sheets on the negative electrode of a power battery. This device includes a transparent conveyor turntable for carrying and transporting the nickel sheets. The transparent conveyor turntable has five nickel sheet inspection stations equidistantly arranged along the transport direction of the nickel sheets: a first nickel sheet inspection station, a second nickel sheet inspection station, a third nickel sheet inspection station, a fourth nickel sheet inspection station, and a fifth nickel sheet inspection station. The device also includes a drive assembly for rotating the transparent conveyor turntable so that the nickel sheets sequentially pass through each nickel sheet inspection station. The first nickel sheet inspection station is equipped with a camera inspection component one for inspecting the flatness of the nickel sheet surface; the second and fourth nickel sheet inspection stations are respectively equipped with camera inspection components two and four for inspecting the appearance defects on the reverse side of the nickel sheet; the third and fifth nickel sheet inspection stations are respectively equipped with camera inspection components three and five for inspecting the appearance defects on the front side of the nickel sheet.

[0005] Specifically, the camera detection assembly includes an adjustment slide, a high-definition industrial camera, and an illumination system. The high-definition industrial camera is mounted on the outside of the transparent conveyor turntable via the adjustment slide. The high-definition industrial camera is equipped with a telecentric lens that is aligned with the nickel sheet on the transparent conveyor turntable, and the shooting direction is parallel to the radial direction of the transparent conveyor turntable. The illumination system includes a backlight source that is supported and mounted above the transparent conveyor turntable via a light source adjustment rod and aligned with the telecentric lens.

[0006] Specifically, the camera detection component two includes an adjustment slide two, a high-definition industrial camera two, and an illumination system two. The high-definition industrial camera two is installed below the transparent conveyor turntable via the adjustment slide two, with its shooting direction upward and perpendicular to the transparent conveyor turntable. The illumination system two includes a high-brightness combined light source one and a light shield one. The high-brightness combined light source one includes two strip light sources arranged side by side on the left and right sides of the high-definition industrial camera two. The light shield one is installed above the transparent conveyor turntable and aligned with the high-definition industrial camera two. The two strip light sources on the left and right sides are lit in turn to trigger the high-definition industrial camera two to take pictures.

[0007] Specifically, the camera detection component three includes an adjustment slide three, a high-definition industrial camera three, and an illumination system three. The high-definition industrial camera three is mounted above the transparent conveyor turntable via the adjustment slide three, and its shooting direction is perpendicular to the transparent conveyor turntable. The illumination system three includes an annular combined light source one disposed between the high-definition industrial camera three and the transparent conveyor turntable, and a light shield two installed below the transparent conveyor turntable and aligned with the high-definition industrial camera three. The annular combined light source one includes two annular light sources one distributed vertically. The centers of the two annular light sources one are located on the same vertical line and are aligned with or coincide with the optical axis of the high-definition industrial camera three. One of the two annular light sources one is a high-angle white light annular light source, and the other is a low-angle blue light annular light source. The two annular light sources one are lit up alternately to take pictures.

[0008] Specifically, the camera detection component four includes an adjustment slide four, a high-definition industrial camera four, and an illumination system four. The high-definition industrial camera four is mounted below the transparent conveyor turntable via the adjustment slide four, and its shooting direction is perpendicular to the transparent conveyor turntable. The illumination system four includes a ring-shaped combined light source two disposed between the high-definition industrial camera four and the transparent conveyor turntable, and a light shield three mounted above the transparent conveyor turntable and aligned with the high-definition industrial camera four. The ring-shaped combined light source two includes two ring-shaped light sources two distributed vertically. The centers of the two ring-shaped light sources two are located on the same vertical line and are aligned with or coincide with the optical axis of the high-definition industrial camera four. One of the two ring-shaped light sources two is a high-angle white light ring light source, and the other is a low-angle blue light ring light source. The two ring-shaped light sources two are lit up alternately to take pictures.

[0009] Specifically, the camera detection component five includes an adjustment slide five, a high-definition industrial camera five, and an illumination system five. The high-definition industrial camera five is mounted above the transparent conveyor turntable via the adjustment slide five, and its shooting direction is perpendicular to the transparent conveyor turntable. The illumination system five includes a high-brightness combined light source two and a light shield four. The high-brightness combined light source two includes two strip light sources arranged side by side on the left and right sides of the high-definition industrial camera five. The light shield four is installed below the transparent conveyor turntable and is aligned with the high-definition industrial camera five. The two strip light sources on the left and right sides are lit in turn to trigger the high-definition industrial camera five to take pictures.

[0010] Specifically, a sixth nickel sheet inspection station is provided on the transparent conveyor turntable along the conveying direction of the nickel sheet. The sixth nickel sheet inspection station is located downstream of the fifth nickel sheet inspection station. The sixth nickel sheet inspection station is equipped with a camera inspection component six for detecting nickel cap crack defects on the nickel sheet. The camera inspection component six includes an adjustment slide six, a high-definition industrial camera six, a hexahedral prism, and an illumination system six. The high-definition industrial camera six is ​​mounted above the transparent conveyor turntable via the adjustment slide six, and its shooting direction is perpendicular to the transparent conveyor turntable. The hexahedral prism is installed between the transparent conveyor turntable and the high-definition industrial camera six, and the optical axis of the high-definition industrial camera six coincides with the center of the hexahedral prism. The illumination system six includes a high-brightness surface light source located below the transparent conveyor turntable and aligned with the high-definition industrial camera six.

[0011] Specifically, it also includes a feeding mechanism, which includes a vibrating feeder, a linear vibrating track, and a feed counter. One end of the linear vibrating track is connected to the outlet of the vibrating feeder, and the other end is connected to the inlet of the transparent conveying turntable. The feed counter is used to count the nickel sheet feed.

[0012] Specifically, it also includes a defect analysis system and a material counting mechanism. The defect analysis system classifies nickel sheets into good and defective products based on the detection results of the camera detection component, and the material counting mechanism automatically separates good and defective products based on the analysis results of the defect analysis system.

[0013] In another aspect, this utility model also provides a method for inspecting the appearance of nickel sheets for the negative electrode of a power battery. The nickel sheets are fed into a vibrating feeding tray, sorted by a linear vibrating track, and then sent to a transparent conveyor turntable. The sorted nickel sheets are counted by a feeding counter and then transferred to each nickel sheet inspection station. Six camera inspection components take multi-angle pictures of the appearance of the nickel sheets in sequence, and use a defect analysis system to analyze defects such as flatness, front and back sides, and integrity of the nickel cap. After the inspection is completed, the system sorts the materials according to the inspection results. Good products are sent to the good product box and defective products are sent to the defective product box through a material counting mechanism.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Comprehensive coverage: Multiple camera inspection components are used to take pictures of the front and back of the nickel sheet from multiple angles, and corresponding inspections are carried out on the front, back, flatness and nickel cap crack defects of the nickel sheet. It is not only comprehensive, but also highly efficient.

[0015] 2. High-precision recognition: Combining multi-light source and high-angle light source shooting technology ensures a high recognition rate for minute defects. The high-angle white light ring light source and the low-angle blue light ring light source are used in combination. By taking pictures by flashing the light sources in turn, the clarity of the detection is enhanced.

[0016] 3. Comprehensive Inspection: The transparent glass turntable and multiple light sources flash in turn to ensure all-round inspection of the nickel sheet throughout the entire transmission process. The use of a hexahedral prism enables comprehensive multi-angle inspection of the nickel sheet. Combined with the high-brightness light source at the bottom, the light can penetrate the cracked area more strongly, improving the accuracy of identifying fine cracks, thereby effectively reducing missed detections and improving the inspection yield.

[0017] 4. Adjustability: Equipped with an adjustable slide, the position of the camera and light source can be adjusted by adjusting the slide to ensure the adaptability and stability of the detection and meet the detection needs of nickel sheets of different specifications.

[0018] 5. High reliability: Equipped with a light shield to reduce external light interference and improve image quality. The system is rigorously designed to effectively reduce external interference and improve detection accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the appearance inspection device for the negative electrode nickel sheet of the power battery provided in this embodiment; Figure 2 This is a schematic diagram of a camera detection component provided in this embodiment; Figure 3 This is a schematic diagram of the camera detection component two provided in this embodiment; Figure 4 This is a schematic diagram of the camera detection component three provided in this embodiment; Figure 5 This is a schematic diagram of the camera detection component four provided in this embodiment; Figure 6 This is a schematic diagram of camera detection component five provided in this embodiment; Figure 7This is a schematic diagram of the camera detection component six provided in this embodiment; Figure 8 This is a schematic diagram of the feeding and counting mechanism provided in this embodiment; The components include: 1. Transparent conveyor turntable; 2. First nickel sheet inspection station; 3. Second nickel sheet inspection station; 4. Third nickel sheet inspection station; 5. Fourth nickel sheet inspection station; 6. Fifth nickel sheet inspection station; 7. Camera inspection component one; 71. Adjusting slide one; 72. High-definition industrial camera one; 73. Lighting system one; 731. Light source adjustment rod; 732. Backlight source; 74. Telecentric lens; 8. Camera inspection component two; 81. Adjusting slide two; 82. High-definition industrial camera two; 83. Lighting system two; 831. High-brightness combined light source one; 832. Light shield one; 9. Camera inspection component three; 91. Adjusting slide three; 92. High-definition industrial camera three; 93. Lighting system three; 931. Ring combined light source one; 932. Light shield two; 10. Camera inspection component four; 101. Adjusting slide four; 102. High... Industrial camera 4; 103, Lighting system 4; 1031, Ring-shaped combined light source 2; 1032, Light shield 3; 11, Camera detection assembly 5; 111, Adjustment slide 5; 112, High-definition industrial camera 5; 113, Lighting system 5; 1131, High-brightness combined light source 2; 1132, Light shield 4; 12, Material counting mechanism; 121, Material box; 122, Blow needle; 123, Full material indicator light; 134, Material box sensor; 135, Glass cleaner; 13, Sixth nickel sheet inspection station; 14, Camera detection assembly 6; 141, Adjustment slide 6; 142, High-definition industrial camera 6; 143, Hexahedral prism; 144, Lighting system 6; 15, Feeding mechanism; 151, Vibrating feeder; 152, Straight vibrating track; 153, Feed counter; 16, Defect analysis system; 17, Drive assembly. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figure 1A device for inspecting the appearance of nickel sheets for negative electrodes of power batteries includes a transparent conveying turntable 1 for carrying and transporting nickel sheets. A first nickel sheet inspection station 2, a second nickel sheet inspection station 3, a third nickel sheet inspection station 4, a fourth nickel sheet inspection station 5, and a fifth nickel sheet inspection station 6 are equidistantly arranged on the transparent conveying turntable 1 along the transport direction of the nickel sheets. The first nickel sheet inspection station 2 is equipped with a camera inspection component 7 for inspecting the flatness of the nickel sheet surface. The second and fourth nickel sheet inspection stations 3 and 5 are respectively equipped with camera inspection components 8 and 10 for inspecting appearance defects on the reverse side of the nickel sheets. The third and fifth nickel sheet inspection stations 4 and 6 are respectively equipped with camera inspection components 9 and 11 for inspecting appearance defects on the front side of the nickel sheets.

[0023] The device also includes a feeding counting mechanism 12, a defect analysis system 16, and a drive assembly 17. The drive assembly 17 is used to drive the transparent conveyor turntable 1 to rotate so that the nickel sheets pass through each nickel sheet inspection station in sequence. The defect analysis system divides the nickel sheets into good and defective products according to the inspection results of the camera inspection component. The feeding counting mechanism 12 automatically completes the separation of good and defective products according to the analysis results of the defect analysis system. As for the specific structure of the feeding counting mechanism 12, the defect analysis system 16, and the drive assembly 17, they are all existing technologies and will not be described in detail here.

[0024] This embodiment utilizes multiple camera detection components to perform high-speed, multi-angle imaging of the front and back of the nickel sheet, detecting the front, back, and flatness of the nickel sheet. This not only provides comprehensive detection but also ensures high efficiency.

[0025] See Figure 2 It is understandable that in the actual design, the camera detection component 7 includes an adjustment slide 71, a high-definition industrial camera 72, and an illumination system 73. The high-definition industrial camera 72 is mounted on the outside of the transparent conveyor turntable 1 via the adjustment slide 71. The high-definition industrial camera 72 is equipped with a telecentric lens 74 that is aligned with the nickel sheet on the transparent conveyor turntable 1, and the shooting direction of the telecentric lens 74 is parallel to the radial direction of the transparent conveyor turntable 1. The illumination system 73 includes a backlight source 732 that is supported and mounted above the transparent conveyor turntable 1 via a light source adjustment rod 731 and aligned with the telecentric lens 74.

[0026] In this embodiment, when the driving component drives the transparent conveying turntable 1 to rotate and conveys the nickel sheet to the first nickel sheet inspection station 2, the high-definition industrial camera 72 realizes high-speed imaging and inspection. The outer contour of the product is imaged using the telecentric lens 74 and the backlight source 732. The defect analysis system then measures and calculates the deformation of the outer contour based on the relative positional relationship between the outer contour and the transparent conveying turntable 1, thereby determining whether the flatness of the product appearance meets the requirements.

[0027] See Figure 3 In some embodiments, the camera detection component 2 8 includes an adjustment slide 2 81, a high-definition industrial camera 2 82, and an illumination system 2 83. The high-definition industrial camera 2 82 is mounted below the transparent conveyor turntable 1 via the adjustment slide 2 81, with its shooting direction upward and perpendicular to the transparent conveyor turntable 1. The illumination system 2 83 includes a high-brightness combined light source 1 831 and a light shield 1 832. The high-brightness combined light source 1 831 includes two strip light sources arranged side by side on the left and right sides of the high-definition industrial camera 2 82. The light shield 1 832 is mounted above the transparent conveyor turntable 1 and aligned with the high-definition industrial camera 2 82. The two strip light sources on the left and right sides are lit in turn to trigger the high-definition industrial camera 2 82 to take pictures.

[0028] In this embodiment, the driving component drives the transparent conveyor turntable 1 to rotate and transport the nickel sheet to the second nickel sheet inspection station 3. The high-definition industrial camera 82 takes pictures parallel to the product. The contrast characteristics of the defects are enhanced by the light and dark transition surface formed by the alternating illumination of the two light sources, thereby forming a gradual shadow on the lower surface of the product. The "unevenness" and "scratches" defects on the lower surface of the nickel sheet are judged based on the changes in the shadow.

[0029] See Figure 4 It should be explained that in some other designs, the camera detection component 39 includes an adjustment slide 391, a high-definition industrial camera 392, and an illumination system 393. The high-definition industrial camera 392 is mounted above the transparent conveyor turntable 1 via the adjustment slide 391, and its shooting direction is perpendicular to the transparent conveyor turntable 1. The illumination system 393 includes an annular combined light source 1 931 set between the high-definition industrial camera 392 and the transparent conveyor turntable 1, and a light shield 2 932 installed below the transparent conveyor turntable 1 and aligned with the high-definition industrial camera 392. The annular combined light source 1 931 includes two annular light sources 1 distributed vertically. The centers of the two annular light sources 1 are located on the same vertical line and are aligned with or coincide with the optical axis of the high-definition industrial camera 392. One of the two annular light sources 1 is a high-angle white light annular light source, and the other is a low-angle blue light annular light source. The two annular light sources take turns lighting up to take pictures, and clear detection of a large area on the front is achieved through uniform illumination of the light source.

[0030] In this embodiment, a high-angle white ring light source illuminates the highly reflective surface on the upper surface of the nickel sheet, achieving the same effect as specular reflection. A low-angle blue ring light source darkens the highly reflective surface on the upper surface of the nickel sheet. By alternately illuminating the high-angle white ring light source and the low-angle blue ring light source and taking two photos, complex defects such as "scratches" and "dirt" on the same surface can be detected.

[0031] See Figure 5Similarly, similar to the structure of camera inspection component 39, camera inspection component 410 includes an adjustment slide 4101, a high-definition industrial camera 4102, and an illumination system 4103. The high-definition industrial camera 4102 is mounted below the transparent conveyor turntable 1 via the adjustment slide 4101, and its shooting direction is perpendicular to the transparent conveyor turntable 1. The illumination system 4103 includes a ring-shaped combined light source 21031 set between the high-definition industrial camera 4102 and the transparent conveyor turntable 1, and a light shield 31032 mounted above the transparent conveyor turntable 1 and aligned with the high-definition industrial camera 4102. The ring-shaped combined light source 21031 includes two ring-shaped light sources 2 distributed vertically. The centers of the two ring-shaped light sources 2 are located on the same vertical line and are aligned or coincident with the optical axis of the high-definition industrial camera 4102. One of the two ring-shaped light sources 2 is a high-angle white light ring light source, and the other is a low-angle blue light ring light source. By alternately lighting the high-angle white light ring light source and the low-angle blue light ring light source, two pictures are taken to realize the detection of complex defects such as "scratches" and "dirt" on the lower surface of the nickel sheet.

[0032] In this embodiment, by cooperating with camera detection component 28, the reverse side detection area can be fully covered, realizing comprehensive detection of various defects on the reverse side of the nickel sheet, and significantly reducing the defect miss rate.

[0033] See Figure 6 In some embodiments, the camera detection component 5 11 includes an adjustment slide 5 111, a high-definition industrial camera 5 112, and an illumination system 5 113. The high-definition industrial camera 5 112 is mounted above the transparent conveyor turntable 1 via the adjustment slide 5 111, and its shooting direction is perpendicular to the transparent conveyor turntable 1. The illumination system 5 113 includes a high-brightness combined light source 2 1131 and a light shield 4 1132. The high-brightness combined light source 2 1131 includes two strip light sources arranged side by side on the left and right sides of the high-definition industrial camera 5 112. The light shield 4 1132 is installed below the transparent conveyor turntable 1 and is aligned with the high-definition industrial camera 5 112. The two strip light sources on the left and right sides are lit in turn to trigger the high-definition industrial camera 5 112 to take pictures, thereby forming a gradual shadow on the surface of the product. The "unevenness" and "scratches" on the surface of the nickel sheet are judged based on the changes in the shadow. The camera detection component 5 11 is used to perform secondary inspection of the appearance defects on the surface of the nickel sheet to ensure that no defects are missed.

[0034] See Figure 7Specifically, a sixth nickel sheet inspection station 13 is provided on the transparent conveyor turntable 1 along the conveying direction of the nickel sheet. The sixth nickel sheet inspection station 13 is located downstream of the fifth nickel sheet inspection station 6. The sixth nickel sheet inspection station 13 is provided with a camera inspection component 6 14 for detecting nickel cap crack defects on the nickel sheet. The camera inspection component 6 14 includes an adjustment slide 6 141, a high-definition industrial camera 6 142, a hexahedral prism 143, and an illumination system 6 144. The high-definition industrial camera 6 142 is installed above the transparent conveyor turntable 1 via the adjustment slide 6 141, and its shooting direction is perpendicular to the transparent conveyor turntable 1. The hexahedral prism 143 is installed between the transparent conveyor turntable 1 and the high-definition industrial camera 6 142, and the optical axis of the high-definition industrial camera 6 142 coincides with the center of the hexahedral prism 143. The illumination system 6 144 includes a high-brightness surface light source located below the transparent conveyor turntable 1 and aligned with the high-definition industrial camera 6 142.

[0035] In this embodiment, the detection camera six is ​​used to perform the final detection of complex defects such as "nickel cap cracking" on the nickel sheet. When the nickel sheet passes through the center of the prism, the light source is lit and the camera is triggered to take a picture. If cracking occurs, a bright spot is formed on the image. The high-definition industrial camera six 142 uses a hexahedral prism 143 to realize multi-angle comprehensive detection of the nickel sheet. With the high-brightness light source at the bottom, the light can penetrate the cracked area more strongly, improving the accuracy of fine crack identification, thereby effectively reducing missed detections and improving the detection yield.

[0036] Specifically, the device also includes a feeding mechanism 15, which includes a vibrating feeder 151, a linear vibrating track 152, and a feed counter. One end of the linear vibrating track 152 is connected to the discharge port of the vibrating feeder 151, and the other end is connected to the feed port of the transparent conveying turntable 1. The feed counter is used to count the nickel sheet feed. The transparent conveying turntable 1 can be a glass turntable, and the adjustment method of the adjusting slide can be manual or fully automatic.

[0037] See Figure 8The feeding and counting machine 12 includes several material boxes 121 arranged side-by-side along the nickel sheet conveying direction and blow needles 122 that blow nickel sheets into the corresponding material boxes. Each material box 121 is equipped with a corresponding blow needle 122. The material boxes are divided into OK material boxes (good product boxes) and NG material boxes (defective product boxes). When the nickel sheet analysis result of the defect analysis system is good, the defect analysis system controls the transparent conveyor turntable 1 to rotate, so that the nickel sheet carried on it is aligned with the OK material box. After the nickel sheet is aligned with the OK material box, the blow needle blows air, blowing the nickel sheet into the OK material box for storage. The feeding is counted according to the number of blows by the blow needle to ensure the quantity of products stored in each material box. When the nickel sheet analysis result of the defect analysis system is defective, the defect analysis system controls the transparent conveyor turntable 1 to rotate, so that the nickel sheet carried on it is aligned with the NG material box. After the nickel sheet is aligned with the NG material box, the blow needle blows air, blowing the nickel sheet into the NG material box for storage. Each material box 121 is equipped with a full indicator light 123. When the material box 121 is full, the indicator light illuminates to indicate that the material box 121 is full and can be removed. Each material box 121 is also equipped with a material box sensor 134. When the material box 121 is removed, the material box sensor 134 will deactivate and trigger an alarm. The material counting machine 12 is also equipped with a glass cleaner 135. The glass cleaner 135 is driven by a brushless motor to rotate a circular sponge cleaning head to clean dust on the glass turntable to avoid affecting the product testing results.

[0038] A method for inspecting the appearance of nickel sheets for negative electrodes in power batteries: The nickel sheets are fed into a vibrating feeding tray 151, sorted by a linear vibrating track 152, and then sent to a transparent conveying turntable 1. The sorted nickel sheets are counted by a feeding counter and transferred to various nickel sheet inspection stations. Six camera inspection components take multi-angle pictures of the appearance of the nickel sheets in sequence, and use a defect analysis system to analyze defects such as flatness, front and back sides, and integrity of the nickel cap. After the inspection is completed, the system sorts the materials according to the inspection results. Good products are sent to the good product box and defective products are sent to the defective product box through the unloading counting mechanism 12.

[0039] The above embodiments are merely illustrative examples to clearly illustrate the present invention, and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A device for inspecting the appearance of nickel foil negative electrode of a power battery, characterized in that: The system includes a transparent conveyor turntable (1) for carrying and conveying nickel sheets. The transparent conveyor turntable (1) is provided with a first nickel sheet inspection station (2), a second nickel sheet inspection station (3), a third nickel sheet inspection station (4), a fourth nickel sheet inspection station (5), and a fifth nickel sheet inspection station (6) equidistantly spaced along the conveying direction of the nickel sheets. It also includes a drive assembly for driving the transparent conveyor turntable (1) to rotate, so that the nickel sheets sequentially pass through each nickel sheet inspection station. The first nickel sheet inspection station (2) is equipped with a camera inspection component 1 (7) for inspecting the flatness of the nickel sheet surface; the second nickel sheet inspection station (3) and the fourth nickel sheet inspection station (5) are respectively equipped with a camera inspection component 2 (8) and a camera inspection component 4 (10) for inspecting the appearance defects on the reverse side of the nickel sheet; the third nickel sheet inspection station (4) and the fifth nickel sheet inspection station (6) are respectively equipped with a camera inspection component 3 (9) and a camera inspection component 5 (11) for inspecting the appearance defects on the front side of the nickel sheet.

2. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 1, characterized in that... The camera detection component 1 (7) includes an adjustment slide 1 (71), a high-definition industrial camera 1 (72), and an illumination system 1 (73). The high-definition industrial camera 1 (72) is mounted on the outside of the transparent conveyor turntable (1) via the adjustment slide 1 (71). The high-definition industrial camera 1 (72) is equipped with a telecentric lens (74) that is aligned with the nickel sheet on the transparent conveyor turntable (1), and the shooting direction is parallel to the radial direction of the transparent conveyor turntable (1). The illumination system 1 (73) includes a backlight source (732) that is supported and mounted above the transparent conveyor turntable (1) via a light source adjustment rod (731) and aligned with the telecentric lens (74).

3. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 1, characterized in that... The camera detection component 2 (8) includes an adjustment slide 2 (81), a high-definition industrial camera 2 (82), and an illumination system 2 (83). The high-definition industrial camera 2 (82) is installed below the transparent conveyor turntable (1) via the adjustment slide 2 (81), and its shooting direction is upward and perpendicular to the transparent conveyor turntable (1). The illumination system 2 (83) includes a high-brightness combined light source 1 (831) and a light shield 1 (832). The high-brightness combined light source 1 (831) includes two strip light sources arranged side by side on the left and right sides of the high-definition industrial camera 2 (82). The light shield 1 (832) is installed above the transparent conveyor turntable (1) and is aligned with the high-definition industrial camera 2 (82). The two strip light sources on the left and right sides are lit in turn to trigger the high-definition industrial camera 2 (82) to take pictures.

4. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 1, characterized in that... The camera detection component three (9) includes an adjustment slide three (91), a high-definition industrial camera three (92), and an illumination system three (93). The high-definition industrial camera three (92) is mounted above the transparent conveyor turntable (1) via the adjustment slide three (91), and the shooting direction is perpendicular to the transparent conveyor turntable (1). The illumination system three (93) includes an annular combined light source one (931) disposed between the high-definition industrial camera three (92) and the transparent conveyor turntable (1) and a light shield two (932) installed below the transparent conveyor turntable (1) and aligned with the high-definition industrial camera three (92). The annular combined light source one (931) includes two annular light sources one distributed vertically. The centers of the two annular light sources one are located on the same vertical line and are aligned or coincident with the optical axis of the high-definition industrial camera three (92). One of the two annular light sources one is a high-angle white light annular light source, and the other is a low-angle blue light annular light source. The two annular light sources one are lit up in turn to take pictures.

5. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 1, characterized in that... The camera detection component four (10) includes an adjustment slide four (101), a high-definition industrial camera four (102), and an illumination system four (103). The high-definition industrial camera four (102) is installed below the transparent conveyor turntable (1) via the adjustment slide four (101), and the shooting direction is perpendicular to the transparent conveyor turntable (1). The illumination system four (103) includes a ring-shaped combined light source two (1031) disposed between the high-definition industrial camera four (102) and the transparent conveyor turntable (1), and a light shield three (1032) installed above the transparent conveyor turntable (1) and aligned with the high-definition industrial camera four (102). The ring-shaped combined light source two (1031) includes two ring-shaped light sources two distributed vertically. The centers of the two ring-shaped light sources two are located on the same vertical line and are aligned or coincident with the optical axis of the high-definition industrial camera four (102). One of the two ring-shaped light sources two is a high-angle white light ring light source, and the other is a low-angle blue light ring light source. The two ring-shaped light sources two are lit up in turn to take pictures.

6. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 1, characterized in that... The camera detection component five (11) includes an adjustment slide five (111), a high-definition industrial camera five (112), and an illumination system five (113). The high-definition industrial camera five (112) is mounted above the transparent conveyor turntable (1) via the adjustment slide five (111), and its shooting direction is perpendicular to the transparent conveyor turntable (1). The illumination system five (113) includes a high-brightness combined light source two (1131) and a light shield four (1132). The high-brightness combined light source two (1131) includes two strip light sources arranged side by side on the left and right sides of the high-definition industrial camera five (112). The light shield four (1132) is installed below the transparent conveyor turntable (1) and is aligned with the high-definition industrial camera five (112). The two strip light sources on the left and right sides are lit in turn to trigger the high-definition industrial camera five (112) to take pictures.

7. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 1, characterized in that... The transparent conveyor turntable (1) is further provided with a sixth nickel sheet inspection station (13) along the conveying direction of the nickel sheet. The sixth nickel sheet inspection station (13) is located downstream of the fifth nickel sheet inspection station (6). The sixth nickel sheet inspection station (13) is provided with a camera inspection assembly six (14) for detecting nickel cap crack defects of nickel sheets. The camera inspection assembly six (14) includes an adjustment slide six (141), a high-definition industrial camera six (142), a hexahedral prism (143), and an illumination system six (144). 42) The slide six (141) is installed above the transparent conveyor turntable (1) and the shooting direction is perpendicular to the transparent conveyor turntable (1). The hexahedral prism (143) is installed between the transparent conveyor turntable (1) and the high-definition industrial camera six (142). The optical axis of the high-definition industrial camera six (142) coincides with the center of the hexahedral prism (143). The lighting system six (144) includes a high-brightness surface light source disposed below the transparent conveyor turntable (1) and aligned with the high-definition industrial camera six (142).

8. The appearance inspection device for the negative electrode nickel sheet of a power battery according to any one of claims 1-7, characterized in that... It also includes a feeding mechanism (15), which includes a vibrating feeder (151), a linear vibrating track (152) and a feed counter. One end of the linear vibrating track (152) is connected to the outlet of the vibrating feeder (151), and the other end is connected to the inlet of the transparent conveying turntable (1). The feed counter is used to count the nickel sheet feed.

9. The appearance inspection device for the negative electrode nickel sheet of a power battery according to claim 8, characterized in that... It also includes a defect analysis system and a material counting mechanism (12). The defect analysis system divides the nickel sheets into good and defective products according to the detection results of the camera detection component. The material counting mechanism (12) automatically completes the separation of good and defective products according to the analysis results of the defect analysis system.

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