A laser inspection device for surface defects in the production of battery cell thermal insulation protection boards

Abstract

This invention relates to the technical field of battery cell thermal insulation protection board production, specifically a surface defect laser inspection device for battery cell thermal insulation protection board production. The device includes an outer housing for stable placement and a testing platform mounted on top of it. A self-adjusting component for adjusting the position of a support plate is fixed on the testing platform outside the rotating rod. Laser rangefinders for detecting surface defects in the battery cell thermal insulation protection board are symmetrically installed on both the upper and lower sides of a first fixing frame. This surface defect laser inspection device for battery cell thermal insulation protection board production can continuously inspect different positions of multiple battery cell thermal insulation protection boards using multiple sets of laser rangefinders. This facilitates the detection of the thickness of the battery cell thermal insulation protection board at various locations, thereby avoiding defects such as excessively thin or thick areas that could affect the thermal insulation performance. It can also detect defects such as protrusions or unevenness on the surface of the battery cell thermal insulation protection board, improving inspection efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of battery cell heat insulation protection board production, specifically to a surface defect laser detection device for battery cell heat insulation protection board production. Background Technology

[0002] The cell heat insulation protection board is a material used to protect the battery. Currently, the cell heat insulation protection boards on the market are composed of materials such as aerogel felt, so they are considered new materials. Since the quality of the cell heat insulation protection board directly affects the safety and consistency of the battery module, intelligent laser inspection is required on the surface of the cell heat insulation protection board after production. This is to determine whether there are any protrusions or unevenness on the surface of the cell heat insulation protection board, as well as whether the thickness is uniform in various locations. Therefore, the surface defect laser inspection equipment used in the production of cell heat insulation protection boards belongs to intelligent manufacturing equipment. Through laser inspection, non-contact and high-precision inspection operations can be achieved, and damage to the cell heat insulation protection board can also be prevented. For example, the patent disclosed in the prior art with publication number "CN216432884U" is entitled "A Rapid Detection Device for Surface Defects of Stainless Steel Plates." It discloses that by rotating the first screw, two threaded seats with opposite thread patterns can be brought closer together, allowing the laser emitter and receiver to work close to the edge of the small plate. This reduces detection errors caused by excessive distance between the laser emitter / receiver and the plate edge, enhancing the device's practicality. By rotating the second screw, two mounting seats with opposite thread patterns can be brought closer together, ensuring the laser emitter and receiver are in close contact with the upper and lower surfaces of the plate, allowing simultaneous detection of both surfaces, shortening inspection time and improving work efficiency. Another example is the patent application disclosed in the prior art with publication number "CN112781523A." The document, entitled "A Portable Surface Defect Detection Device and Method Based on Laser Displacement Measurement," discloses a process where a workpiece is placed between left and right support frames. The height of the support frames is adjusted according to the workpiece's dimensions. The workpiece is positioned within the measurement range of a laser displacement sensor, which is directed towards the workpiece to measure the vertical Z-direction displacement of the workpiece surface. The laser displacement sensor is zeroed to determine the reference plane of the workpiece surface. The device is then connected to a host computer (such as a laptop) via a hub. Data acquisition software is opened, and control buttons are used to drive a ball screw to move the workpiece surface horizontally in the X-direction, completing one defect measurement and data acquisition cycle. The height of the telescopic platform is adjusted to change the position of the laser displacement sensor in the vertical Y-direction of the workpiece surface, completing another defect measurement and data acquisition cycle. This process is repeated until the entire workpiece surface defect measurement and data acquisition are completed.

[0003] The existing surface defect laser inspection equipment described above uses a ball screw to move a laser displacement sensor horizontally in the X direction on the workpiece surface. Since only one laser displacement sensor is used, only one battery cell heat insulation protection board can be inspected at a time. When multiple battery cell heat insulation protection boards need to be inspected, the inspection efficiency is slow. Therefore, we propose a surface defect laser inspection equipment for battery cell heat insulation protection board production to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a surface defect laser inspection device for the production of battery cell heat insulation protection boards, so as to solve the problem mentioned in the background art that the existing surface defect laser inspection devices, when in use, drive a ball screw to move the laser displacement sensor horizontally in the X direction on the workpiece surface. Since only one laser displacement sensor is set, only one battery cell heat insulation protection board can be laser inspected at a time. When multiple battery cell heat insulation protection boards need to be inspected, the inspection efficiency is slow.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser inspection device for surface defects in the production of battery cell heat insulation protection boards, comprising an outer shell for stable placement and an inspection platform mounted thereon. A rotating rod is connected through the upper center of the inspection platform, and a support plate is mounted on the outer side of the rotating rod via a connecting assembly. An upper clamping frame and a lower clamping frame for clamping and placing the battery cell heat insulation protection board are sequentially mounted from top to bottom on the side of the support plate away from the connecting assembly. A self-adjusting assembly for adjusting the position of the support plate is fixed on the inspection platform outside the rotating rod. A first fixing frame is installed at equal intervals on the outer side of the inspection platform, and laser rangefinders for detecting surface defects in the battery cell heat insulation protection board are symmetrically mounted on both the upper and lower sides of the first fixing frame.

[0006] Preferably, a protective frame in the shape of a ring is fixed above the testing platform, and a through groove is opened in the lower left corner of the protective frame. An observation door is slidably connected inside the through groove. Both the through groove and the observation door are arc-shaped, and the arc length of the observation door is greater than the arc length of the through groove. The observation door is slidably connected to the hollow inner wall of the protective frame.

[0007] Preferably, the lower end of the rotating rod is connected to a motor inside the housing.

[0008] Preferably, the connecting assembly includes connecting columns that are equally spaced and installed inside the outer side of the rotating rod, and an adjusting column is slidably connected inside the hollow connecting column. A return spring is nested and connected to the outer side of the adjusting column located inside the connecting column, and one end of the adjusting column is connected to the support plate.

[0009] Preferably, a protruding rod is installed below the end of the adjusting column near the support plate.

[0010] Preferably, the lower clamping frame is fixedly connected to the support plate, and a guide rod is installed in a symmetrical slot on one side of the support plate. One end of the upper clamping frame is installed through the outer side of the guide rod, and a connecting spring is nested on the upper outer side of the guide rod. The upper clamping frame and the support plate form an up-and-down lifting structure. Suction cups are installed on the adjacent sides of the upper and lower clamping frames.

[0011] Preferably, a first magnet is installed above the end of the upper clamping frame near the support plate, a second fixing frame is installed above the lower left corner of the detection table, and a second magnet is installed below the end of the second fixing frame near the rotating rod. The second magnet and the corresponding first magnet below it have opposite magnetic poles.

[0012] Preferably, the self-regulating component includes a fixing block installed on the detection platform corresponding to the outside of the rotating rod. The fixing block is arranged in a ring shape, and an arc-shaped first protrusion, a second protrusion, and a third protrusion are respectively installed on the rear, right, and front sides of the fixing block. The arc lengths of the first, second, and third protrusions increase sequentially, and a protruding rod is attached to the outside of the fixing block.

[0013] Preferably, a mounting frame with a "7"-shaped structure is installed above the end of the lower clamping frame away from the support plate. Detection rods are rotatably installed on the lower clamping frame corresponding to the horizontal plane above the mounting frame and below the mounting frame. A guide roller is fixed through the upper outer side of the detection rod, and a speed sensor is connected to the lower outer side of the detection rod. The two speed sensors are respectively installed on the lower clamping frame corresponding to the horizontal plane above the mounting frame and below the mounting frame.

[0014] Preferably, the upper and lower guide rollers are concentric and have the same diameter.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards uses multiple sets of laser rangefinders to continuously inspect different positions of multiple battery cell heat insulation protection boards, so as to facilitate the detection of the thickness of each position of the battery cell heat insulation protection board. This avoids defects such as localized excessive thinness or thickness of the battery cell heat insulation protection board, which would affect the heat insulation performance. At the same time, it can also detect whether there are defects such as protrusions or unevenness on the surface of the battery cell heat insulation protection board, thus improving the inspection efficiency. The specific details are as follows: (1) The shortest distance between the upper and lower laser rangefinders can be intelligently measured and the heat insulation protection board of the battery cell can be measured. At the same time, the position of multiple heat insulation protection boards of the battery cell can be automatically adjusted by the self-adjustment component. Therefore, multiple sets of laser rangefinders can continuously detect different positions of multiple heat insulation protection boards of the battery cell, so as to detect the thickness of each position of the heat insulation protection board of the battery cell. This can avoid the defects of the heat insulation protection board of the battery cell being too thin or too thick in some places, which will affect the heat insulation performance. At the same time, it can also detect whether there are defects such as protrusions or unevenness on the surface of the heat insulation protection board of the battery cell, thus improving the detection efficiency. (2) The self-regulating component includes a first protrusion, a second protrusion and a third protrusion with successively increasing arc length, so that the first protrusion, the second protrusion and the third protrusion can control the protrusion to move different lengths, thereby facilitating the automatic adjustment of the position of multiple cell heat insulation protection plates, and making the operation convenient; (3) The guide rollers not only facilitate the placement of the cell heat insulation protection plate onto the lower clamping frame, but also, through the combined use of the upper and lower guide rollers and the speed sensor, can intelligently detect whether there are protrusions or tilting defects on the edge of the cell heat insulation protection plate after cutting, thus meeting different detection needs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top sectional view of the protective frame of the present invention. Figure 3 This is a top view of the detection platform of the present invention; Figure 4 This is a schematic diagram of the detection platform structure from below in this invention; Figure 5 This is a top sectional view of the connection between the connecting column and the rotating rod of the present invention. Figure 6 This is a schematic cross-sectional view of the connecting column structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the support plate and the upper clamping frame of the present invention; Figure 8 This is a bottom view of the lower clamping frame structure of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the lower clamping frame in Embodiment 2 of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Outer shell; 2. Testing platform; 3. Protective frame; 4. Observation door; 5. Rotating rod; 6. Connecting column; 7. Adjusting column; 8. Return spring; 9. Support plate; 10. Upper clamping frame; 11. Lower clamping frame; 12. First magnet block; 13. Protruding rod; 14. Fixing block; 15. First protrusion; 16. Second protrusion; 17. Third protrusion; 18. First fixing frame; 19. Laser rangefinder; 20. Second fixing frame; 21. Second magnet block; 22. Guide rod; 23. Connecting spring; 24. Mounting frame; 25. Testing rod; 26. Guide roller; 27. Speed ​​sensor. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-10 The present invention provides the following technical solution: Example 1: The surface defect laser inspection equipment for battery cell heat insulation protection board production in this example uses multiple sets of laser rangefinders 19 to inspect different locations on multiple battery cell heat insulation protection boards, facilitating the detection of thickness at each location. This avoids defects such as localized excessive thinness or thickness of the battery cell heat insulation protection board, which could affect its heat insulation performance. Simultaneously, it can also detect defects such as protrusions or unevenness on the surface of the battery cell heat insulation protection board, improving inspection efficiency. For the specific structure, please refer to the attached diagram. Figures 1-8As shown, the outer casing 1 is used for stable placement, and a testing platform 2 is installed on top of it. A rotating rod 5 is connected through the upper center of the testing platform 2, and a support plate 9 is installed on the outer side of the rotating rod 5 through a connecting assembly. On the side of the support plate 9 away from the connecting assembly, an upper clamping frame 10 and a lower clamping frame 11 for clamping and placing the cell heat insulation protection plate are installed sequentially from top to bottom. A self-adjusting assembly for adjusting the position of the support plate 9 is fixed on the testing platform 2 outside the rotating rod 5. A first fixing frame 18 is installed at equal intervals on the outer side of the testing platform 2, and a first fixing frame 18 is symmetrically installed on both the upper and lower sides for clamping and placing the cell heat insulation protection plate. The laser rangefinder 19 for surface defect detection has a circular protective frame 3 fixed above the detection platform 2. A through slot is provided in the lower left corner of the protective frame 3, and an observation door 4 is slidably connected inside the through slot. Both the through slot and the observation door 4 are arc-shaped, with the arc length of the observation door 4 being greater than that of the through slot. The observation door 4 is slidably connected to the hollow inner wall of the protective frame 3. The lower end of the rotating rod 5 is connected to a motor inside the outer casing 1. The connecting assembly includes connecting columns 6 evenly spaced inside the outer side of the rotating rod 5. An adjusting column 7 is slidably connected inside the hollow connecting column 6, and the adjusting column 7 located inside the connecting column 6 is nested outside the connecting column 6. A reset spring 8 is connected to the adjustment column 7, one end of which is connected to the support plate 9. A protruding rod 13 is installed below the end of the adjustment column 7 near the support plate 9. The lower clamping frame 11 is fixedly connected to the support plate 9. A guide rod 22 is installed with symmetrical slots on one side of the support plate 9. One end of the upper clamping frame 10 is installed through the outer side of the guide rod 22. A connecting spring 23 is nested above the outer side of the guide rod 22. The upper clamping frame 10 and the support plate 9 form an up-and-down lifting structure. Suction cups are installed on adjacent sides of the upper clamping frame 10 and the lower clamping frame 11. A first magnet block 12 is installed above the end of the upper clamping frame 10 near the support plate 9. The detection table 2 A second fixing bracket 20 is installed at the upper left corner, and a second magnet block 21 is installed below the end of the second fixing bracket 20 near the rotating rod 5. The second magnet block 21 and the corresponding first magnet block 12 below it are opposite magnetic poles. The self-regulating component includes a fixing block 14 installed on the detection platform 2 corresponding to the outside of the rotating rod 5. The fixing block 14 is arranged in a ring shape, and an arc-shaped first protrusion 15, a second protrusion 16 and a third protrusion 17 are respectively installed on the rear, right and front sides of the fixing block 14. The arc lengths of the first protrusion 15, the second protrusion 16 and the third protrusion 17 increase sequentially, and a protruding rod 13 is attached to the outside of the fixing block 14.

[0020] First, manually push the arc-shaped observation door 4 to the left, allowing it to enter the left side of the hollow inner wall of the protective frame 3, thus opening the observation door 4 smoothly. Next, the PLC control mechanism inside the outer casing 1 starts the motor inside the casing 1, causing the motor to rotate the rotating rod 5 clockwise by 45°. The rotating rod 5 then rotates the four outer connecting components simultaneously, causing the connecting components to rotate the four support plates 9, the upper clamping frame 10, and the lower clamping frame 11 together. When the front support plate 9, the upper clamping frame 10, and the lower clamping frame 11 rotate clockwise... When the clock hand rotates 45°, the second magnet 21 and the first magnet 12 directly below it are opposite magnetic poles, so the second magnet 21 applies a certain attraction to the first magnet 12. Then the first magnet 12 drives the upper clamping frame 10 to move upward. At this time, one end of the upper clamping frame 10 slides on the outside of the guide rod 22, and the connecting spring 23 is squeezed and stored. Then, the staff manually or by using a robot arm, puts the heat insulation protection plate of the battery cell to be tested through the through slot opened in the lower left corner of the protective frame 3 which is not covered by the observation door 4, onto the corresponding lower clamping frame 11.

[0021] Next, the motor drives the rotating rod 5 to rotate 45° clockwise, causing the second magnet 21 to no longer correspond to the first magnet 12. At this time, the stored force of the connecting spring 23 automatically drives the upper clamping frame 10 to move downward, so that the suction cups on the inner sides of the upper clamping frame 10 and the lower clamping frame 11 adsorb and fix the cell heat insulation protection plate. At the same time, the two laser rangefinders 19 on the left side intelligently measure the shortest distance between themselves and the cell heat insulation protection plate. When the two laser rangefinders 19 detect that the shortest distance between themselves and the cell heat insulation protection plate is D1, the shortest distance between the two laser rangefinders 19 is D. At this time, the thickness of the cell heat insulation protection plate at the measuring part is D2 = D - D. 1. Then, the motor drives the rotating rod 5 to rotate 45° clockwise. Similarly, as shown above, place the other battery cell heat insulation protection plate onto the corresponding lower clamping frame 11. Then, the motor drives the rotating rod 5 to rotate 45° clockwise. At this time, the protruding rod 13 below the left adjusting column 7 is in contact with the outer side of the fixing block 14. Then, the protruding rod 13 below the left adjusting column 7 rotates to the rear and is in contact with the first protrusion 15. The first protrusion 15 applies a backward pushing force to the protruding rod 13, causing the protruding rod 13 to drive the adjusting column 7 to move backward. The adjusting column 7 slides backward in the connecting column 6, the return spring 8 is compressed and stored, and the adjusting column 7 pushes the support plate 9, the upper clamping frame 10 and the lower clamping frame 11. Moving backward allows the two laser rangefinders 19 located on the rear side to intelligently measure the shortest distance between themselves and the battery cell heat insulation protection plate. When the two laser rangefinders 19 detect a shortest distance of D1 between themselves and the battery cell heat insulation protection plate, the shortest distance between them is D. At this time, the thickness of the measured part of the battery cell heat insulation protection plate is D2 = D - D1. Then, as described above, the motor drives the rotating rod 5 to continue rotating clockwise. Since the arc lengths of the first protrusion 15, the second protrusion 16, and the third protrusion 17 increase sequentially, the first protrusion 15, the second protrusion 16, and the third protrusion 17 can control the protrusion rod 13 to move by different lengths. This facilitates automatic adjustment of the positions of multiple cell heat insulation protection boards, allowing the four sets of laser rangefinders 19 to detect different positions on the same cell heat insulation protection board. This enables multiple sets of laser rangefinders 19 to continuously detect different positions on multiple cell heat insulation protection boards, facilitating the detection of the thickness at various locations. If the detected thickness D2 value is the same each time, it indicates that the surface of the cell heat insulation protection board is flat and without unevenness. Therefore, it effectively detects whether there are defects such as protrusions or unevenness on the surface of the cell heat insulation protection board, thus avoiding defects such as localized excessive thinness or thickness that could affect the heat insulation performance and improving detection efficiency.

[0022] Similarly, as shown above, the tested battery cell heat insulation protection board can be manually removed by staff or by using a robotic arm from the through slot in the lower left corner of the protective frame 3. After the test is completed, the observation door 4 is manually slid to the right so that the observation door 4 blocks and closes the through slot in the lower left corner of the protective frame 3. Then, the unused laser rangefinder 19 can be shielded and protected through the protective frame 3.

[0023] Example 2: The surface defect laser inspection equipment for battery cell heat insulation protection board production in this example, based on Example 1, not only facilitates the guidance and placement of the battery cell heat insulation protection board onto the lower clamping frame 11 through the setting of guide rollers 26, but also intelligently detects whether there are protrusions or tilting defects on the cut edge of the battery cell heat insulation protection board through the cooperation of the upper and lower sets of guide rollers 26 and the speed sensor 27. This can meet different inspection needs. For the specific structure, please refer to the attached diagram. Figures 9-10 As shown, a mounting bracket 24 with a "7" shape is installed above the end of the lower clamping bracket 11 away from the support plate 9. Detection rods 25 are rotatably mounted on the upper horizontal plane of the mounting bracket 24 and on the corresponding lower clamping bracket 11 below the mounting bracket 24. A guide roller 26 is fixed through the upper outer side of the detection rod 25, and a speed sensor 27 is connected to the lower outer side of the detection rod 25. The two speed sensors 27 are respectively installed on the upper horizontal plane of the mounting bracket 24 and on the corresponding lower clamping bracket 11 below the mounting bracket 24. The upper and lower guide rollers 26 are concentric and have the same diameter.

[0024] When the cell heat insulation protection plate is placed on the lower clamping frame 11, the two sides of the cell heat insulation protection plate are in contact with the outer side of the guide roller 26. The guide roller 26 guides the cell heat insulation protection plate. When the cell heat insulation protection plate moves at a constant speed towards the support plate 9, the two sides of the cell heat insulation protection plate will drive the guide roller 26 and the detection rod 25 to rotate through friction. At this time, the speed sensor 27 will detect the speed of the detection rod 25. When the speed sensor 27 detects that the detection rod 25 stops rotating, it means that the side of the cell heat insulation protection plate is not in contact with the guide roller 26. At this time, the side of the cell heat insulation protection plate has a tilted surface defect. When the cell heat insulation protection plate cannot be pushed towards the support plate 9, it means that there is a protrusion on the side of the cell heat insulation protection plate. The guide roller 26 blocks the protrusion, so that the cell heat insulation protection plate cannot be pushed towards the support plate 9. This can meet different detection requirements and complete a series of tasks.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser inspection device for surface defects in the production of battery cell heat insulation protection boards, comprising an outer housing (1) for stable placement and an inspection platform (2) mounted thereon, characterized in that: A rotating rod (5) is connected through the upper center of the testing platform (2), and a support plate (9) is installed on the outer side of the rotating rod (5) through a connecting component. An upper clamping frame (10) and a lower clamping frame (11) for clamping and placing the battery cell heat insulation protection board are installed sequentially from top to bottom on the side of the support plate (9) away from the connecting component. A self-adjusting component for adjusting the position of the support plate (9) is fixed on the testing platform (2) outside the rotating rod (5). A first fixing frame (18) is installed at equal intervals on the outer side of the testing platform (2), and a laser rangefinder (19) for detecting surface defects of the battery cell heat insulation protection board is symmetrically installed on both the upper and lower sides of the first fixing frame (18).

2. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 1, characterized in that: The detection platform (2) is fixed with a protective frame (3) in the shape of a ring. A through groove is opened in the lower left corner of the protective frame (3), and an observation door (4) is slidably connected inside the through groove. Both the through groove and the observation door (4) are arc-shaped, and the arc length of the observation door (4) is greater than the arc length of the through groove. The observation door (4) is slidably connected to the protective frame (3) whose inner wall is hollow.

3. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 1, characterized in that: The lower end of the rotating rod (5) is connected to the motor inside the outer casing (1).

4. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 1, characterized in that: The connecting assembly includes connecting columns (6) that are equally spaced and installed inside the outer side of the rotating rod (5). The connecting columns (6) are hollow inside and have an adjusting column (7) that is slidably connected inside. A return spring (8) is nested on the outer side of the adjusting column (7) located inside the connecting column (6). One end of the adjusting column (7) is connected to the support plate (9).

5. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 4, characterized in that: A protruding rod (13) is installed below one end of the adjusting column (7) near the support plate (9).

6. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 1, characterized in that: The lower clamping frame (11) is fixedly connected to the support plate (9), and a guide rod (22) is installed in a symmetrical slot on one side of the support plate (9). One end of the upper clamping frame (10) is installed through the outer side of the guide rod (22), and a connecting spring (23) is nested on the upper outer side of the guide rod (22). The upper clamping frame (10) and the support plate (9) form an up-and-down lifting structure. Suction cups are installed on the adjacent sides of the upper clamping frame (10) and the lower clamping frame (11).

7. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 1, characterized in that: The upper clamping frame (10) is equipped with a first magnet block (12) above one end of the support plate (9), and the detection table (2) is equipped with a second fixing frame (20) above the lower left corner. The second fixing frame (20) is equipped with a second magnet block (21) below one end of the rotating rod (5). The second magnet block (21) and the corresponding first magnet block (12) below it are opposite magnetic poles.

8. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 3, characterized in that: The self-regulating component includes a fixing block (14) installed on the detection platform (2) corresponding to the outside of the rotating rod (5). The fixing block (14) is arranged in a ring shape, and the rear, right and front sides of the fixing block (14) are respectively equipped with an arc-shaped first protrusion (15), a second protrusion (16) and a third protrusion (17). The arc lengths of the first protrusion (15), the second protrusion (16) and the third protrusion (17) increase sequentially, and a protruding rod (13) is attached to the outside of the fixing block (14).

9. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 1, characterized in that: The lower clamping frame (11) is mounted on a mounting frame (24) in the shape of a "7" above the end away from the support plate (9). Detection rods (25) are rotatably mounted on the lower clamping frame (11) above the horizontal plane of the mounting frame (24) and below the mounting frame (24). A guide roller (26) is fixed through the upper outer side of the detection rod (25), and a speed sensor (27) is connected to the lower outer side of the detection rod (25). The two speed sensors (27) are respectively mounted on the lower clamping frame (11) above the horizontal plane of the mounting frame (24) and below the mounting frame (24).

10. The surface defect laser inspection equipment for the production of battery cell heat insulation protection boards according to claim 9, characterized in that: The two guide rollers (26) are concentric and have the same diameter.

Images