Battery cell pole piece visual inspection device

Abstract

The application belongs to the technical field of visual detection, and particularly relates to a kind of battery pole piece visual detection devices, including detection table, two industrial cameras for shooting battery pole piece surface are symmetrically arranged on the side of detection table, adjustable battery pole piece storage assembly and material taking assembly are equipped on the detection table;The adjustable battery pole piece storage assembly includes storage table and four limit plates, the storage table is fixedly connected to the upper surface of detection table, and the bottom of four limit plates is attached to the upper surface of storage table.The application realizes that whenever a battery pole piece surface is detected to have defects, two transparent films can be bonded by using glue, the pole piece is covered by the mutual cooperation of two transparent films, and then ink dots are sprayed on the surface of transparent film corresponding to the defects.Subsequent personnel can quickly and accurately locate defects by observing ink dots when processing unqualified pole pieces, which is beneficial to improve processing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, specifically a visual inspection device for battery cell electrodes. Background Technology

[0002] Battery cell electrodes are core components inside lithium-ion batteries, typically referring to metal foils coated with active materials for electrochemical reactions. Depending on whether they are positive or negative electrodes, they are classified as positive electrode sheets or negative electrode sheets. During the manufacturing process, battery cell electrodes are prone to surface defects due to factors such as materials, equipment, and processes. To prevent defective products from flowing into subsequent processes, visual inspection of the electrodes is necessary to reject unqualified products.

[0003] In existing technologies, when visually inspecting battery cell electrodes, the electrode to be inspected is placed near a CCD camera, which takes a picture to capture the electrode image. The image information is then fed back to the main control module, and these images are transmitted via a data transmission module to an external algorithm platform for inference and calculation, providing the inference result to detect defects. However, typically, to improve material utilization and reduce production costs, when a defective electrode is detected, the defective part is cut off, and the qualified part is retained for continued use. However, when subsequently processing these defective electrodes, if the defect is not obvious, it is difficult to accurately locate the defect, thus affecting the processing efficiency of the electrode.

[0004] Furthermore, although the location of defects can be determined by searching a database, when a large number of defective electrodes need to be processed, this frequent searching is not only time-consuming and labor-intensive, but also prone to confusion, which also affects processing efficiency. Summary of the Invention

[0005] To overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a visual inspection device for battery cell electrodes.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a visual inspection device for battery cell electrodes, including an inspection table, on one side of which two industrial cameras for photographing the surface of battery cell electrodes are symmetrically arranged. The inspection table is provided with an adjustable battery cell electrode storage component and a material handling component.

[0007] The adjustable battery cell electrode storage assembly includes a storage platform and four limiting plates. The storage platform is fixedly connected to the upper surface of the testing platform. The bottom of the four limiting plates is attached to the upper surface of the storage platform. The four limiting plates cooperate with each other to form a frame structure that matches the specifications of the battery cell electrode. Multiple battery cell electrodes are stacked in the frame structure.

[0008] The material handling assembly includes four adjusting columns, each with a suction cup fixedly connected to its bottom. The suction cup extends into the frame structure and adheres to the surface of the battery cell electrode sheet, adsorbing it under negative pressure. The suction cup removes the battery cell electrode sheet from the frame structure and places it between two industrial cameras for inspection.

[0009] The testing platform is equipped with a lateral limiting marking component to assist personnel in observing the location of defects on the surface of the battery cell electrode sheets;

[0010] The lateral positioning marking assembly includes a film structure and a spray dot structure;

[0011] The coating structure includes two winding rollers and two adsorption plates. The two winding rollers and the two adsorption plates are arranged symmetrically from top to bottom. A transparent film is wound on the winding rollers. An adsorption port is provided on one side of the adsorption plate. The adsorption plate adsorbs the transparent film through the adsorption port and covers the surface of the cell electrode sheet with the transparent film.

[0012] The inkjet structure includes two inkjet guns arranged symmetrically at the top and bottom. The inkjet guns spray ink onto the surface of the transparent film, and the position of the ink droplets corresponds to the position of the defect in the battery cell electrode.

[0013] Preferably, the storage platform is provided with an adjustment component for controlling the dimensions of the frame structure;

[0014] The adjustment assembly includes a positive and negative lead screw module three disposed on one side of the upper surface of the storage platform. The positive and negative lead screw module three is provided with slides on both sides. The two limit plates are slidably disposed on the two slides respectively. A positive and negative lead screw module four for driving the limit plates to move is provided on one slide. A connecting rod two is fixedly connected to one edge of the two limit plates on the same side. The two limit plates on the other side are slidably passed through the two connecting rods two respectively.

[0015] Preferably, the detection stage is equipped with an adsorption displacement component;

[0016] The adsorption displacement assembly includes two adjusting plates and a crossbeam fixedly connected to the upper surface of the detection platform. A linear module is provided on one side of the top of the crossbeam. A transverse plate is fixedly connected to the moving end of the linear module. A gear and rack lifting module is provided on one side of the transverse plate. A lifting plate is fixedly connected to the lower end of the rack of the gear and rack lifting module. Two adjusting plates are distributed on both sides of the bottom of the lifting plate. One adjusting plate is fixedly connected to the lower surface of the lifting plate, and the other adjusting plate is slidably connected to the lower surface of the lifting plate. An electric push rod is fixedly connected to one end of the electric push rod. The piston end of the electric push rod is fixedly connected to one end of one adjusting plate. Two adjusting columns are slidably connected to the lower surfaces of the two adjusting plates. A positive and negative screw module is provided on one adjusting plate to drive the adjusting columns. A connecting rod is fixedly connected to one side of each of the two adjusting columns on the same side. The two adjusting columns on the other side are slidably inserted through the two connecting rods. A vacuum generator is provided on one side of the top of the lifting plate. The air inlet of the vacuum generator is connected to multiple suction cups through a flexible pipeline.

[0017] Preferably, the testing table is equipped with an unwinding and coating assembly;

[0018] The unwinding and coating assembly includes a support column three fixedly connected to one side of the testing table and a glue tank. Two winding rollers are rotatably connected to the support column three. Limiting platforms are fixedly connected to the upper and lower surfaces of the glue tank. The transparent films on the two winding rollers slide through the grooves of the limiting platforms on both sides. A cylinder seven is fixedly connected to one end face of the glue tank. A roller frame is fixedly connected to the piston end of the cylinder seven. Coating rollers are fixedly connected to both ends of the roller frame. Multiple glue outlets aligned with the surface of the coating rollers are provided at the edge of the upper limiting platform. A glue pump is provided on one side of the outer wall of the glue tank. The glue inlet end of the glue pump is connected to the inner cavity of the glue tank. The glue outlet end of the glue pump is connected to multiple glue outlets through pipelines.

[0019] Preferably, two motors are fixedly connected to one side of the upper end of the support column three, and the output ends of the two motors are respectively fixedly connected to the rotating ends of the two winding rollers.

[0020] Preferably, the testing stage is provided with a traction component for adsorbing and pressing the transparent film onto the adsorption plate;

[0021] The traction assembly includes a linear module two disposed on one side of the upper surface of the testing platform. The moving end of the linear module two is fixedly connected to a support column one. A positive and negative lead screw module one is disposed on one side of the support column one. Adjusting rods are disposed on both the upper and lower sides of the positive and negative lead screw module one. Two dampers are fixedly connected to one side of the adjusting rod. The piston ends of the upper and lower dampers are respectively fixedly connected to the surfaces of two adsorption plates. A spring is fixedly connected to one side of the adsorption plate. The other end of the spring is fixedly connected to the adjusting rod. A vacuum generator two is disposed on one side of the surface of the adsorption plate. The air inlet of the vacuum generator two is connected to the adsorption port.

[0022] Preferably, the testing platform is equipped with a compression and cutting assembly;

[0023] The extrusion cutting assembly includes a second support column slidably connected to one side of the upper surface of the testing platform. A first cylinder is fixedly connected to one side of the upper surface of the testing platform. The piston end of the first cylinder is fixedly connected to one end of the second support column. Two fixing plates are fixedly connected symmetrically above and below the second support column. A third cylinder is fixedly connected to one side of the fixing plates. A pressure plate is fixedly connected to the piston end of the third cylinder. A fifth cylinder is fixedly connected to one side of the upper fixing plate. A blade is fixedly connected to the piston end of the fifth cylinder.

[0024] Preferably, a support column four is fixedly connected to one side of the upper surface of the testing platform, a cylinder four is fixedly connected to one side of the support column four, a connecting plate is fixedly connected to the piston end of the cylinder four, and one end of each of the two inkjet guns is fixedly connected to the connecting plate.

[0025] Preferably, it includes an adaptable tear-off aid component that assists personnel in tearing off the transparent film;

[0026] The adaptable tearing aid assembly includes a perforated plate with multiple conical spikes at the bottom. The perforated plate is vertically slidably connected to an upper adsorption plate. A cylinder is fixedly connected to one side of the upper adsorption plate, and the piston end of the cylinder is fixedly connected to one side of the top of the perforated plate. Multiple mating holes corresponding to the conical spikes are opened on one side of the lower adsorption plate.

[0027] Preferably, the storage platform is equipped with a film removal anti-sticking component;

[0028] The anti-adhesion assembly for the sample removal includes a linear module three located on one side of the storage platform. The movable end of the linear module three is fixedly connected to a lifting platform. The upper surface of the lifting platform is provided with a positive and negative lead screw module five. Both sides of the positive and negative lead screw module five are provided with lifting rods. The upper end of the lifting rod is fixedly connected to a cylinder six. The piston end of the cylinder six is ​​fixedly connected to a limit plate. An air outlet is inclined on one side of the upper end of the lifting rod. An air pump is provided on one side of the lower surface of the storage platform. The air outlet of the air pump is connected to one end of the air outlet through a flexible hose. A strip-shaped through hole is provided in the middle of the storage platform for the lifting rod to pass through.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. The present invention provides a visual inspection device for battery cell electrodes. Whenever a defect is detected on the surface of a battery cell electrode, two transparent films are glued together, covering the electrode. Ink dots are then sprayed onto the surface of the transparent film corresponding to the defect. When processing defective electrodes, personnel can quickly and accurately locate the defect by observing the ink dots, improving processing efficiency. Compared to determining the defect location by searching a database, this method implements on-the-fly marking, eliminating the need for searching, saving time and effort, and reducing confusion. Furthermore, since the pressed and bonded area of ​​the two transparent films is at the edge of the electrode, they also limit the electrode's position, preventing it from shifting and ensuring precise alignment between the defect and the ink dots. Moreover, the glue and ink remain only on the surface of the transparent films and do not remain on the electrode surface, thus not affecting the electrode surface quality.

[0031] 2. The battery cell electrode visual inspection device of the present invention utilizes an adaptive tear-aid component to form a row of notches on the transparent film after the electrode is covered. When subsequent operators need to remove the transparent film, no external tools are required; the film can be easily torn off along the notches, making the operation convenient and less likely to cause the electrode to bend. Similarly, the perforation orientation can be changed by adjusting the lateral position of the electrode, thereby matching the number of transparent films attached and ensuring that the perforation area covers the entire attachment area, further facilitating the removal of the transparent film.

[0032] 3. The battery cell electrode visual inspection device of this invention utilizes an anti-adhesion assembly. After the suction cup is attached to the four corners of the electrode in the frame structure, the air outlet is positioned close to the edge of the electrode at a specified height. Gas is discharged from the air outlet through a pipe and blown into the gap between the electrode held by the suction cup and the electrode below it. The edge of the upper electrode is lifted by the airflow, widening the gap between the two electrodes. At this time, the limiting plate moves and extends into the gap, and then the lifting rod descends, pressing the limiting plate against the lower electrode. Afterward, the suction cup lifts the electrode again, thus preventing adhesion and ensuring continuous and stable subsequent inspection work. Attached Figure Description

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0035] Figure 2 This is a schematic diagram of the three-dimensional structure at the transverse sliding plate.

[0036] Figure 3 This is a schematic diagram of the three-dimensional structure of an industrial camera.

[0037] Figure 4 This is a schematic diagram of the three-dimensional structure of the support pillars.

[0038] Figure 5 This is a schematic diagram of a three-dimensional structure of a support column;

[0039] Figure 6 yes Figure 5 Enlarged view of a portion of point A in the middle;

[0040] Figure 7 This is a schematic diagram of the three-dimensional structure of the adsorption plate.

[0041] Figure 8 This is a schematic diagram of the three-dimensional structure of the storage platform;

[0042] Figure 9 yes Figure 8 Enlarged view of a section at point B in the middle;

[0043] Figure 10 This is a three-dimensional structural diagram of the storage platform from another perspective;

[0044] Figure 11 yes Figure 10 Enlarged view of a section at point C;

[0045] Figure 12 This is a schematic diagram of the three-dimensional structure of the two pillars;

[0046] Figure 13 This is a schematic diagram of the three-dimensional structure of the pressure plate.

[0047] Figure 14 This is a schematic diagram of the three-dimensional structure of the adhesive tank;

[0048] Figure 15 yes Figure 14 Enlarged view of a section at point D;

[0049] Figure 16 This is a schematic diagram of the three-dimensional structure of the adjustment plate;

[0050] Figure 17 yes Figure 16 Enlarged view of a section at point E in the middle.

[0051] In the diagram: 1. Testing table; 2. Adjusting plate; 3. Industrial camera; 4. Crossbeam; 5. Transverse plate; 6. Linear module one; 7. Storage platform; 8. Support column one; 9. Gear and rack lifting module; 10. Lifting plate; 11. Vacuum generator one; 12. Linear module two; 13. Cylinder one; 14. Support column two; 15. Positive and negative lead screw module one; 16. Connecting rod one; 17. Adjusting rod; 18. Damper; 19. Spring; 20. Vacuum generator two; 21. Adsorption plate; 22. Cylinder two; 23. Perforated plate; 24. Positive and negative lead screw module two; 25. Limiting plate; 26. Slide table; 27. Positive and negative lead screw module three; 28. Positive and negative lead screw module four; 29. ​​Adjusting column; 30. 31. Limiting plate; 32. Cylinder 6; 33. Air outlet; 34. Suction cup; 35. Lifting rod; 36. Lifting platform; 37. Positive and negative lead screw module 5; 38. Mating hole; 39. Transparent film; 40. Cylinder 3; 41. Pressure plate; 42. Support column 3; 43. Adhesive tank; 44. Inkjet gun; 45. Connecting plate; 46. Cylinder 4; 47. Blade; 48. Cylinder 5; 49. Fixing plate; 50. Motor 1; 51. Winding roller; 52. Cylinder 7; 53. Adhesive pump; 54. Adhesive outlet; 55. Glue coating roller; 56. Electric actuator; 57. Roller frame; 58. Limiting platform; 59. Suction port; 60. Air pump; 61. Connecting rod 2; 62. Linear module 3. Detailed Implementation

[0052] The technical solution of the present invention will now be clearly and completely described 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.

[0053] Example 1:

[0054] Please refer to Figures 1-17 The present invention provides a technical solution: a visual inspection device for battery cell electrodes, including an inspection table 1, two industrial cameras 3 for photographing the surface of battery cell electrodes are symmetrically arranged on one side of the inspection table 1, and the inspection table 1 is provided with an adjustable battery cell electrode storage component and a material picking component.

[0055] The adjustable battery cell electrode storage assembly includes a storage platform 7 and four limiting plates 25. The storage platform 7 is fixedly connected to the upper surface of the testing platform 1. The bottom of the four limiting plates 25 is attached to the upper surface of the storage platform 7. The four limiting plates 25 cooperate with each other to form a frame structure that matches the specifications of the battery cell electrode. Multiple battery cell electrodes are stacked in the frame structure.

[0056] The material handling assembly includes four adjusting columns 29, and each of the four adjusting columns 29 is fixedly connected to a suction cup 33. The suction cup 33 extends into the frame structure and adheres to the surface of the battery cell electrode sheet, and is adsorbed under the action of negative pressure. The suction cup 33 removes the battery cell electrode sheet from the frame structure and places it between two industrial cameras 3 for detection.

[0057] The testing station 1 is equipped with a lateral limiting marking assembly to assist personnel in observing the location of defects on the surface of the battery cell electrode sheets;

[0058] The lateral positioning marking assembly includes a film structure and a spray dot structure;

[0059] The coating structure includes two winding rollers 51 and two adsorption plates 21. The two winding rollers 51 and the two adsorption plates 21 are arranged symmetrically from top to bottom. A transparent film 38 is wound on the winding rollers 51. An adsorption port 59 is provided on one side of the adsorption plate 21. The adsorption plate 21 adsorbs the transparent film 38 through the adsorption port 59, covering the surface of the battery cell electrode sheet with the transparent film 38.

[0060] The inkjet structure includes two inkjet guns 43 arranged symmetrically on the top and bottom. The inkjet guns 43 spray ink onto the surface of the transparent film 38, and the position of the ink droplets corresponds to the position of the defect in the battery cell electrode.

[0061] like Figure 8 As shown, the storage platform 7 is equipped with an adjustment component for controlling the dimensions of the frame structure;

[0062] The adjustment assembly includes a positive and negative lead screw module 3 27 disposed on one side of the upper surface of the storage platform 7. Both sides of the positive and negative lead screw module 3 27 are provided with slides 26. The two limit plates 25 are respectively slidably disposed on the two slides 26. A positive and negative lead screw module 4 28 for driving the limit plate 25 to move is provided on one slide 26. The two limit plates 25 on the same side are fixedly connected to the edge of one side with connecting rods 2 61. The two limit plates 25 on the other side are respectively slidably disposed on the two connecting rods 2 61.

[0063] like Figure 1 , Figure 2 , Figure 16 As shown, the detection stage 1 is equipped with an adsorption displacement component;

[0064] The adsorption displacement assembly includes two adjusting plates 2 and a crossbeam 4 fixedly connected to the upper surface of the detection table 1. A linear module 6 is provided on one side of the top of the crossbeam 4. A transverse plate 5 is fixedly connected to the moving end of the linear module 6. A gear and rack lifting module 9 is provided on one side of the transverse plate 5. A lifting plate 10 is fixedly connected to the lower end of the rack of the gear and rack lifting module 9. The two adjusting plates 2 are distributed on both sides of the bottom of the lifting plate 10. One adjusting plate 2 is fixedly connected to the lower surface of the lifting plate 10, and the other adjusting plate 2 is slidably connected to the lower surface of the lifting plate 10. An electric current is fixedly connected to one end of the lifting plate 10. The piston end of the push rod 56 is fixedly connected to one end of the adjustment plate 2 on one side. The two adjustment columns 29 on both sides are slidably connected to the lower surface of the two adjustment plates 2 on both sides. The adjustment plate 2 on one side is provided with a positive and negative screw module 24 for driving the adjustment column 29 to move. The two adjustment columns 29 on the same side are fixedly connected to one side surface of the connecting rod 16. The two adjustment columns 29 on the other side are slidably passed through the two connecting rods 16. The top side of the lifting plate 10 is provided with a vacuum generator 11. The air inlet of the vacuum generator 11 is connected to multiple suction cups 33 through a flexible pipe.

[0065] like Figure 14 and Figure 15 As shown, the testing station 1 is equipped with an unwinding and coating assembly;

[0066] The unwinding and coating assembly includes a support column 3 41 fixedly connected to one side of the inspection table 1 and a glue tank 42. Two winding rollers 51 are rotatably connected to the support column 3 41. Limiting platforms 58 are fixedly connected to the upper and lower surfaces of the glue tank 42. The transparent films 38 on the two winding rollers 51 are slidably inserted into the grooves of the limiting platforms 58 on both sides. A cylinder 7 52 is fixedly connected to one end face of the glue tank 42. A roller frame 57 is fixedly connected to the piston end of the cylinder 7 52. Coating rollers 55 are fixedly connected to both ends of the roller frame 57. Multiple glue outlets 54 aligned with the surface of the coating rollers 55 are provided at the edge of the upper limiting platform 58. A glue pump 53 is provided on one side of the outer wall of the glue tank 42. The glue inlet end of the glue pump 53 is connected to the inner cavity of the glue tank 42. The glue outlet end of the glue pump 53 is connected to the multiple glue outlets 54 through a pipeline.

[0067] like Figure 14 As shown, two motors 50 are fixedly connected to one side of the upper end of the support column 3 41, and the output ends of the two motors 50 are fixedly connected to the rotating ends of the two winding rollers 51 respectively.

[0068] like Figure 5 As shown, the testing station 1 is equipped with a traction assembly for adsorbing and pressing the transparent film 38 onto the adsorption plate 21.

[0069] The traction assembly includes a linear module 2 12 located on one side of the upper surface of the testing platform 1. The moving end of the linear module 2 12 is fixedly connected to a support column 1 8. A positive and negative lead screw module 15 is located on one side of the support column 1 8. Adjusting rods 17 are located on both the upper and lower sides of the positive and negative lead screw module 15. Two dampers 18 are fixedly connected to one side of the adjusting rod 17. The piston ends of the dampers 18 on the upper and lower sides are fixedly connected to the surfaces of two adsorption plates 21, respectively. A spring 19 is fixedly connected to one side of the adsorption plate 21. The other end of the spring 19 is fixedly connected to the adjusting rod 17. A vacuum generator 20 is located on one side of the surface of the adsorption plate 21. The air inlet of the vacuum generator 20 is connected to the adsorption port 59.

[0070] like Figure 12 and Figure 13 As shown, the testing station 1 is equipped with a compression and cutting assembly;

[0071] The extrusion cutting assembly includes a second support column 14 slidably connected to one side of the upper surface of the testing table 1. A first cylinder 13 is fixedly connected to one side of the upper surface of the testing table 1. The piston end of the first cylinder 13 is fixedly connected to one end of the second support column 14. Two fixing plates 49 are fixedly connected symmetrically above and below the second support column 14. A third cylinder 39 is fixedly connected to one side of the fixing plate 49. A pressure plate 40 is fixedly connected to the piston end of the third cylinder 39. A fifth cylinder 48 is fixedly connected to one side of the upper fixing plate 49. A blade 47 is fixedly connected to the piston end of the fifth cylinder 48.

[0072] like Figure 4 As shown, a support column 46 is fixedly connected to one side of the upper surface of the testing table 1, a cylinder 45 is fixedly connected to one side of the support column 46, a connecting plate 44 is fixedly connected to the piston end of the cylinder 45, and one end of each of the two inkjet guns 43 is fixedly connected to the connecting plate 44.

[0073] Specifically, in existing technologies, when visually inspecting battery cell electrodes, the electrode to be inspected is placed near a CCD camera. The CCD camera takes a picture to acquire an image of the electrode, and the image information is fed back to the main control module. These images are then transmitted via a data transmission module to an external algorithm platform for inference and calculation, providing the inference result and thus detecting defects. However, typically, to improve material utilization and reduce production costs, when a defective electrode is detected, the defective part is cut off, and the qualified part is retained for continued use. However, when subsequently processing these defective electrodes, if the defect is not obvious, it is difficult to accurately locate the defect, thus affecting the processing efficiency of the electrode.

[0074] Furthermore, although the location of defects can be determined by searching a database, when a large number of defective electrodes need to be processed, this frequent searching is not only time-consuming and labor-intensive, but also prone to confusion, which also affects processing efficiency.

[0075] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0076] This solution is applied to visual inspection of rectangular battery cells of the same specifications in a single batch. First, according to the specifications of the battery cells, the three-way lead screw module 27 and the four-way lead screw module 28 are activated. The three-way lead screw module 27 drives two slides 26 to move simultaneously towards or away from each other. The four-way lead screw module 28 drives two limiting plates 25 on one side to move simultaneously towards or away from each other. In addition, the two limiting plates 25 on the other side will also move synchronously under the action of the connecting rod 2 61. This allows the position of the four limiting plates 25 to be adjusted, and the frame structure formed by the four limiting plates 25 to match the specifications of the battery cells.

[0077] Multiple battery cell electrodes to be tested are stacked between the frame structure, with the four corners of the electrodes respectively fitting into the inner angles of the four limiting plates 25. This prevents the electrodes from shifting and helps maintain the neatness and stability of the stacked electrodes. Similarly, the electric push rod 56 can drive the adjustment plate 2 on one side to slide on the lifting plate 10. The positive and negative lead screw module 24 drives the two adjustment columns 29 on one side to move, and with the connection of the connecting rod 16, the two adjustment columns 29 on the other side move synchronously, thereby adjusting the distance between the four suction cups 33 and matching this distance with the electrode size. Furthermore, by using the linear module 6 to drive the transverse plate 5 to move laterally on the crossbeam 4, the four suction cups 33 can be aligned with the four corners of the electrode stacked in the frame structure at the same time. Then, the gear and rack lifting module 9 is used to drive the four suction cups 33 to descend until the suction cups 33 are in contact with the four corners of the electrode. Then, the vacuum generator 11 is activated, which can hold the electrode under negative pressure. Then, the suction cups 33 are driven to rise to remove the electrode from the frame structure.

[0078] Next, the adsorbed electrode is moved between two industrial cameras 3, which respectively capture images of the upper and lower surfaces of the electrode. These images are then uploaded to an image analysis system for analysis, which can detect whether there are defects on the electrode surface. If the electrode surface is defect-free, the suction cup 33 places the electrode on one side of the upper surface of the inspection stage 1, and then adsorbs and inspects subsequent electrodes.

[0079] If there are defects on the electrode surface, the image analysis system will first record the location of the defects, then drive the electrode to move between the glue tank 42 and the support column 8. The linear module 12 will then move the support column 8 closer to the glue tank 42, and the upper adsorption plate 21 will pass between multiple adjusting columns 29, with the electrode positioned between two adsorption plates 21. This continues until the adsorption ports 59 of the two adsorption plates 21 are aligned with the portions of the upper and lower transparent films 38 located in the grooves of the limiting platform 58. Then, the positive and negative lead screw module 15 will drive the two adsorption plates 21 to move closer to the transparent film 38, and the adsorption plates 21 will fit tightly against the surface of the transparent film 38 under the action of the damper 18 and the spring 19. Under negative pressure, the transparent film 38 will be adsorbed at the adsorption port 59. Then, the support column 8 will be driven to move laterally and reset, allowing the adsorption plates 21 to pull the ends of the transparent film 38. Simultaneously, the motor 50 will drive the winding roller 51 to rotate, unwinding the transparent film 38.

[0080] Furthermore, when the transparent film 38 is unwound, the glue pump 53 draws glue from the glue tank 42 and sprays it onto the surface of the coating roller 55 through multiple glue outlets 54 via pipelines. The two coating rollers 55 can be moved by the cylinder 7 52, so that the coating rollers 55 come into contact with the upper surface of the transparent film 38, thus applying glue to a portion of the surface of the transparent film 38.

[0081] As the transparent film 38 continues to unwind, the unwinding stops when one edge of the two adsorption plates 21 aligns with one edge of the electrode. Simultaneously, cylinder 13 drives support column 2 14 to slide on the detection table 1, aligning one edge of the two pressure plates 40 with the other edge of the electrode. At this point, the adhesive on the surface of the transparent film 38 is within the area of ​​the adsorption plates 21 and pressure plates 40, but not within the area of ​​the electrode. Then, two cylinders 39 simultaneously drive the two pressure plates 40 closer together, and the two adsorption plates 21 also move closer together, until the upper and lower transparent films 38 are bonded together by the adhesive. Subsequently, cylinder 58 drives the blade 47 to descend until it contacts the lower fixing plate 49, cutting the transparent film 38. The adsorption port 59 then stops adsorbing the transparent film 38, and the winding roller 51 is driven to rotate again, returning the broken end of the transparent film 38 to the limiting platform 58 for subsequent retrieval.

[0082] At this point, the two cut transparent films 38 are glued together and cover the electrode. Then, the electrode is moved between the two inkjet guns 43. The connecting plate 44 is moved laterally by the cylinder 45, adjusting the position of the two inkjet guns 43. Simultaneously, the electrode is moved laterally, allowing the inkjet guns 43 to spray ink dots onto the surface of the transparent film 38, with the spraying position corresponding to the defect location on the electrode. After spraying, the electrode is placed in another position on the inspection table 1 by the suction cup 33.

[0083] Repeating the above steps, whenever a defect is detected on the surface of a battery cell electrode, it is covered with two transparent films 38, and then ink dots are sprayed onto the surface of the transparent film 38 corresponding to the defect. When processing defective electrodes, personnel can quickly and accurately locate the defect by observing the ink dots, which improves processing efficiency. Compared to determining the defect location by searching a database, this method implements on-the-fly marking, eliminating the need for searching, saving time and effort, and reducing confusion. Furthermore, since the pressed and bonded area of ​​the two transparent films 38 is at the edge of the electrode, they also act as a limiter, preventing the electrode from shifting and ensuring precise alignment between the defect and the ink dots; and the glue and ink remain only on the surface of the transparent films 38, without leaving residue on the electrode surface, thus not affecting the electrode surface quality.

[0084] Furthermore, since the lengths of different electrodes vary, if the transparent film 38 cannot completely cover both sides of the electrode in a single application, after two transparent films 38 have wrapped the electrode, the electrode can be moved laterally a short distance so that the uncovered area of ​​the electrode aligns with the coverage area of ​​the transparent film 38. This process can be repeated to wrap the electrode again with two transparent films 38 until the transparent film 38 evenly covers the electrode surface. Additionally, since the electrode is held in place by the suction cup 33 at this point, the maximum coverage area of ​​the transparent film 38 does not exceed the contact area between the suction cup 33 and the electrode, preventing interference between the transparent film 38 and the suction cup 33. Simultaneously, because surface defects on the electrode are mainly concentrated in non-edge areas, the small uncovered areas at the edges caused by the suction cup 33 will not affect defect marking, and the overall functionality of the solution remains unaffected.

[0085] Example 2:

[0086] like Figures 5-7 As shown, it includes an adaptive tear-off aid component that assists personnel in tearing off the transparent film 38;

[0087] The adaptable tearing aid assembly includes a perforated plate 23 with multiple conical spikes at the bottom. The perforated plate 23 is slidably connected to the upper adsorption plate 21 along the vertical direction. A cylinder 22 is fixedly connected to one side of the upper adsorption plate 21. The piston end of the cylinder 22 is fixedly connected to one side of the top of the perforated plate 23. Multiple mating holes 37 corresponding to the conical spikes are opened on one side of the lower adsorption plate 21.

[0088] Specifically, in the above embodiments, although two transparent films 38 are used to cover the electrode sheet to facilitate subsequent observation of defect locations, the transparent films 38 must be removed before processing defective electrode sheets. Because the surface of the transparent films 38 is relatively smooth and lacks effective points of force application, the removal process is not only laborious but also prone to bending of the electrode sheet due to excessive force, thus affecting the quality of the electrode sheet.

[0089] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0090] After the two adsorption plates 21 press the two transparent films 38 together, the two adsorption plates 21 are first moved laterally away from the electrode a certain distance, so that the multiple conical spikes on the perforated plate 23 are aligned with the connection between the edge of the electrode and the transparent film 38. Then, the cylinder 22 drives the perforated plate 23 to descend, so that the conical spikes pass through the transparent film 38 and extend into the mating hole 37, thereby forming a row of notches on the transparent film 38. When the operator needs to remove the transparent film 38, no external tools are needed; it can be easily torn off along the notch, which is convenient and does not easily cause the electrode to bend. Similarly, the perforation orientation can be changed by adjusting the lateral position of the electrode to match the number of transparent films 38 attached, ensuring that the perforation range covers the entire attachment area, further facilitating the removal of the transparent film 38.

[0091] Example 3:

[0092] like Figures 8-10 As shown, the storage platform 7 is equipped with a film removal anti-sticking component;

[0093] The anti-adhesion assembly for the tablets includes a linear module 362 located on one side of the storage platform 7. The moving end of the linear module 362 is fixedly connected to a lifting platform 35. The upper surface of the lifting platform 35 is provided with a positive and negative lead screw module 36. Both sides of the positive and negative lead screw module 36 are provided with lifting rods 34. The upper end of the lifting rod 34 is fixedly connected to a cylinder 61. The piston end of the cylinder 61 is fixedly connected to a limit plate 30. One side of the upper end of the lifting rod 34 is provided with an air outlet 32. One side of the lower surface of the storage platform 7 is provided with an air pump 60. The air outlet of the air pump 60 is connected to one end of the air outlet 32 ​​through a flexible hose. The middle of the storage platform 7 is provided with a strip-shaped through hole for the lifting rod 34 to pass through.

[0094] Specifically, in the above embodiment, although multiple electrode sheets can be removed from between the limiting plates 25 in sequence using the suction cup 33, the stacked electrode sheets are prone to sticking together due to factors such as static electricity. When the suction cup 33 removes a single electrode sheet, the sticking together can cause the electrode sheets below to rise together, thereby affecting the normal progress of subsequent testing.

[0095] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0096] After the suction cup 33 is attached to the four corners of the electrode in the frame structure, the linear module 362 drives the lifting platform 35 to rise. Simultaneously, according to the electrode size, the forward and reverse screw module 36 adjusts the distance between the two lifting rods 34, bringing the air outlet 32 ​​close to the edge of the electrode and at a specified height. Then, the air pump 60 is activated, and gas is discharged from the air outlet 32 ​​through the pipeline, blowing towards the gap between the electrode held by the suction cup 33 and the electrode below it. The edge of the upper electrode lifts up under the airflow, widening the gap between the two electrodes. At this time, the cylinder 31 moves the limiting plate 30, causing its bottom to extend into the gap. Then, the lifting rod 34 descends, and the limiting plate 30 presses down on the lower electrode. Afterward, the suction cup 33 lifts the electrode again, thus preventing adhesion and ensuring continuous and stable subsequent testing.

[0097] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A visual inspection device for battery cell electrodes, comprising an inspection platform (1), wherein two industrial cameras (3) for photographing the surface of battery cell electrodes are symmetrically arranged on one side of the inspection platform (1), characterized in that: The testing station (1) is equipped with an adjustable battery cell electrode storage assembly and a material retrieval assembly; The adjustable battery cell electrode storage assembly includes a storage platform (7) and four limiting plates (25). The storage platform (7) is fixedly connected to the upper surface of the testing platform (1). The bottom of the four limiting plates (25) is attached to the upper surface of the storage platform (7). The four limiting plates (25) cooperate with each other to form a frame structure that matches the specifications of the battery cell electrode. Multiple battery cell electrodes are stacked in the frame structure. The material handling assembly includes four adjusting columns (29), and each of the four adjusting columns (29) is fixedly connected to a suction cup (33). The suction cup (33) extends into the frame structure and adheres to the surface of the battery cell electrode sheet. Under the action of negative pressure, the suction cup (33) removes the battery cell electrode sheet from the frame structure and places it between two industrial cameras (3) for detection. The testing station (1) is equipped with a lateral limiting marking assembly to assist personnel in observing the location of defects on the surface of the battery cell electrode sheet; The lateral positioning marking assembly includes a film structure and a spray dot structure; The coating structure includes two winding rollers (51) and two adsorption plates (21). The two winding rollers (51) and the two adsorption plates (21) are arranged symmetrically from top to bottom. A transparent film (38) is wound on the winding rollers (51). An adsorption port (59) is provided on one side of the adsorption plate (21). The adsorption plate (21) adsorbs the transparent film (38) through the adsorption port (59) and covers the surface of the battery cell electrode sheet with the transparent film (38). The inkjet structure includes two inkjet guns (43) arranged symmetrically on the top and bottom. The inkjet guns (43) spray ink onto the surface of the transparent film (38), and the ink drop positions correspond to the positions of the cell electrode defects.

2. The cell electrode visual inspection device according to claim 1, characterized in that: The storage platform (7) is equipped with an adjustment component for controlling the size of the frame structure; The adjustment assembly includes a positive and negative lead screw module three (27) disposed on one side of the upper surface of the storage platform (7). The positive and negative lead screw module three (27) is provided with slide tables (26) on both sides. The two limit plates (25) are respectively slidably disposed on the two slide tables (26). A positive and negative lead screw module four (28) for driving the limit plate (25) to move is provided on one slide table (26). A connecting rod two (61) is fixedly connected to one edge of the two limit plates (25) on the same side. The two limit plates (25) on the other side are respectively slidably disposed on the two connecting rod two (61).

3. The cell electrode visual inspection device according to claim 1, characterized in that: The detection stage (1) is equipped with an adsorption displacement component; The adsorption displacement assembly includes two adjusting plates (2) and a crossbeam (4) fixedly connected to the upper surface of the detection platform (1). A linear module (6) is provided on one side of the top of the crossbeam (4). A transverse plate (5) is fixedly connected to the moving end of the linear module (6). A gear and rack lifting module (9) is provided on one side of the transverse plate (5). A lifting plate (10) is fixedly connected to the lower end of the rack of the gear and rack lifting module (9). Two adjusting plates (2) are distributed on both sides of the bottom of the lifting plate (10). One adjusting plate (2) is fixedly connected to the lower surface of the lifting plate (10), and the other adjusting plate (2) is slidably connected to the lower surface of the lifting plate (10). One end of the lifting plate (10) is fixedly connected to the lower surface of the lifting plate (10). An electric push rod (56) is fixedly connected to the piston end of the electric push rod (56) and one end of the adjustment plate (2) on one side. The two adjustment columns (29) on both sides are slidably connected to the lower surface of the two adjustment plates (2) respectively. The adjustment plate (2) on one side is provided with a positive and negative screw module (24) for driving the adjustment column (29) to move. The two adjustment columns (29) on the same side are fixedly connected to one side surface of the connecting rod (16). The two adjustment columns (29) on the other side are slidably passed through the two connecting rods (16) respectively. The top side of the lifting plate (10) is provided with a vacuum generator (11). The air inlet of the vacuum generator (11) is connected to multiple suction cups (33) through a flexible pipe.

4. The cell electrode visual inspection device according to claim 1, characterized in that: The testing station (1) is equipped with an unwinding and coating assembly; The unwinding and coating assembly includes a support column three (41) and an adhesive tank (42) fixedly connected to one side of the testing table (1). Two winding rollers (51) are rotatably connected to the support column three (41). Limiting platforms (58) are fixedly connected to the upper and lower surfaces of the adhesive tank (42). The transparent films (38) on the two winding rollers (51) are slidably inserted into the grooves of the limiting platforms (58) on both sides. A cylinder seven (52) is fixedly connected to one end face of the adhesive tank (42). The piston end of the cylinder seven (52) is fixedly connected to a roller frame (57), and the two ends of the roller frame (57) are fixedly connected to a glue-applying roller (55). Multiple glue outlets (54) aligned with the surface of the glue-applying roller (55) are provided at the edge of the upper limiting platform (58). A glue pump (53) is provided on one side of the outer wall of the glue tank (42). The glue inlet end of the glue pump (53) is connected to the inner cavity of the glue tank (42), and the glue outlet end of the glue pump (53) is connected to multiple glue outlets (54) through a pipeline.

5. The cell electrode visual inspection device according to claim 4, characterized in that: Two motors (50) are fixedly connected to one side of the upper end of the support column (41), and the output ends of the two motors (50) are fixedly connected to the rotating ends of the two winding rollers (51).

6. The cell electrode visual inspection device according to claim 1, characterized in that: The testing station (1) is equipped with a traction assembly for adsorbing and pressing the transparent film (38) onto the adsorption plate (21); The traction assembly includes a linear module two (12) disposed on one side of the upper surface of the detection platform (1). The moving end of the linear module two (12) is fixedly connected to a support column one (8). A positive and negative lead screw module one (15) is provided on one side of the support column one (8). Adjusting rods (17) are provided on both the upper and lower sides of the positive and negative lead screw module one (15). Two dampers (18) are fixedly connected to one side of the adjusting rod (17). The piston ends of the dampers (18) on the upper and lower sides are fixedly connected to the surfaces of two adsorption plates (21) respectively. A spring (19) is fixedly connected to one side of the adsorption plate (21). The other end of the spring (19) is fixedly connected to the adjusting rod (17). A vacuum generator two (20) is provided on one side of the surface of the adsorption plate (21). The air inlet of the vacuum generator two (20) is connected to the adsorption port (59).

7. The cell electrode visual inspection device according to claim 1, characterized in that: The testing station (1) is equipped with a compression cutting assembly; The extrusion cutting assembly includes a second support column (14) slidably connected to one side of the upper surface of the testing platform (1). A first cylinder (13) is fixedly connected to one side of the upper surface of the testing platform (1). The piston end of the first cylinder (13) is fixedly connected to one end of the second support column (14). Two fixing plates (49) are fixedly connected symmetrically on the upper and lower sides of the second support column (14). A third cylinder (39) is fixedly connected to one side of the fixing plate (49). A pressure plate (40) is fixedly connected to the piston end of the third cylinder (39). A fifth cylinder (48) is fixedly connected to one side of the upper fixing plate (49). A blade (47) is fixedly connected to the piston end of the fifth cylinder (48).

8. The cell electrode visual inspection device according to claim 1, characterized in that: The upper surface of the testing platform (1) is fixedly connected to a support column four (46), and a cylinder four (45) is fixedly connected to one side of the support column four (46). A connecting plate (44) is fixedly connected to the piston end of the cylinder four (45), and one end of each of the two inkjet guns (43) is fixedly connected to the connecting plate (44).

9. The cell electrode visual inspection device according to claim 1, characterized in that: Including a tear-off aid component that assists personnel in tearing off the transparent film (38); The adaptable tearing aid assembly includes a perforated plate (23), the bottom of which is provided with multiple conical spikes. The perforated plate (23) is slidably connected to the upper adsorption plate (21) in a vertical direction. A cylinder two (22) is fixedly connected to one side of the upper adsorption plate (21). The piston end of the cylinder two (22) is fixedly connected to the top side of the perforated plate (23). Multiple mating holes (37) corresponding to the conical spikes are opened on one side of the lower adsorption plate (21).

10. The cell electrode visual inspection device according to claim 1, characterized in that: The storage platform (7) is equipped with a film removal anti-sticking component; The anti-adhesion assembly for taking out the tablets includes a linear module three (62) located on one side of the storage platform (7). The moving end of the linear module three (62) is fixedly connected to a lifting platform (35). The upper surface of the lifting platform (35) is provided with a positive and negative screw module five (36). Both sides of the positive and negative screw module five (36) are provided with lifting rods (34). The upper end of the lifting rod (34) is fixedly connected to a cylinder six (31). The piston end of the cylinder six (31) is fixedly connected to a limit plate (30). The upper end of the lifting rod (34) is provided with an air outlet (32) at an angle. The lower surface of the storage platform (7) is provided with an air pump (60). The air outlet of the air pump (60) is connected to one end of the air outlet (32) through a flexible hose. The middle part of the storage platform (7) is provided with a strip-shaped through hole for the lifting rod (34) to pass through.

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