An on-line detection device for winding defects of an electric core

Abstract

This application provides an online detection device for battery cell winding defects, belonging to the field of battery cell manufacturing technology. It includes a controller, and further comprises: a main unit fixedly connected to the top wall of the controller for driving the equipment; a support plate fixedly connected to the middle side wall of the main unit; a control panel fixedly connected to the side wall of the main unit for controlling the equipment; a flattening component disposed at one end of the support plate; a visual inspection component disposed at the top wall of the middle section of the support plate for visually inspecting battery cell appearance defects; a laser inspection component disposed at the bottom of the middle section of the support plate for visually inspecting the geometric appearance of the battery cell; and an infrared imaging inspection component disposed at the end of the support plate away from the flattening component. In this application, multiple detection methods are used in combination to detect the appearance, size, internal structure, and power-conducting effect of the battery cell, significantly improving the accuracy and comprehensiveness of the online detection device for battery cell winding defects.

Description

Technical Field

[0001] This invention relates to the field of battery cell manufacturing technology, and more specifically, to an online detection device for battery cell winding defects. Background Technology

[0002] Online defect detection devices for battery cell winding play a crucial role in lithium-ion battery production, ensuring product quality and safety. With continuous technological advancements, intelligent and data-driven optimization will further improve detection accuracy, becoming a key technology in modern battery manufacturing.

[0003] A search revealed a lithium battery cell testing mechanism and winding machine proposed in Chinese Patent (Publication No.: CN212277244U), which relates to the field of lithium battery processing technology. The lithium battery cell testing mechanism includes a mounting base, a winding device, a power unit, and a sensing device. The winding device is used for winding lithium battery cells. The power unit is mounted on the mounting base and drives the winding device to perform telescopic movements. The sensing device is positioned between the winding device and the power unit. The winding machine includes the lithium battery cell testing mechanism. During the winding process of lithium battery cells, the sensing device can detect the force on the winding device in real-time during its telescopic movements. Based on the changes in force during these movements, the quality of the cells is judged, thus promptly identifying whether the cell quality meets standards. This method offers high testing efficiency, good testing results, and a simple and low-cost structure.

[0004] While the aforementioned patents can achieve the detection function, they still have the following shortcomings in actual use: In practical use, the above-mentioned solution, which uses a single sensing device to detect battery cells, cannot cover all defects that may occur during the battery cell winding process, resulting in a limited detection range. For example, it may only be able to identify surface defects or geometric anomalies, while ignoring internal problems such as gaps or folds. Secondly, the adaptability of a single technology is poor. When different types of battery cells or changes in the production environment occur, it may not be able to maintain efficient detection. In addition, the sensitivity and accuracy of a single sensing device may be insufficient, which may easily lead to missed detections or misjudgments, increasing the risk of unqualified battery cells entering the production line.

[0005] Therefore, we have made improvements and proposed an online detection device for cell winding defects to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide an online detection device for battery cell winding defects to solve the problems mentioned in the background art.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution: An online detection device for battery cell winding defects includes a controller and further includes: The main unit, fixedly connected to the top wall of the controller, is used to drive the device; The support plate is fixedly connected to the side wall of the middle section of the main unit; The control panel is fixedly connected to the side wall of the main unit and is used to control the equipment. A flattening component is located at one end of the support plate; A visual inspection component is installed on the top wall of the middle section of the support plate and is used for visual inspection of cell appearance defects. A laser inspection component is located at the bottom of the middle section of the support plate and is used for visual inspection of the geometric appearance of the battery cell. An infrared imaging detection component is located at the end of the support plate away from the flattening component, and is used to detect local thermal anomalies in the battery cell after a small current is applied. A resistance detection component is located in the middle section of the top side wall of the controller and is used to detect the internal electrical performance of the battery cell. The winding assembly, located in the middle of the controller, is used to wind up the battery cells; Four sets of marking components are respectively set on the outside of the detection ends of the vision inspection component, laser inspection component, infrared imaging inspection component, and resistance inspection component to record the detection results each time and mark the defect location.

[0008] As a preferred technical solution of this application, the flattening assembly includes a limiting frame fixedly connected to the top wall of one end of the support plate. The side wall of the limiting frame is rotatably connected with bolts that penetrate both side walls of the limiting frame. A slider is threadedly connected to the outer side of the middle section of the bolt. The slider is slidably connected to the inner side wall of the limiting frame. Two sets of first limiting frames are fixedly connected to the top wall of the slider. Two third guide rollers are rotatably connected to the outer wall of the limiting frame away from the infrared imaging detection assembly. A support platform is fixedly connected to the outer wall of the limiting frame away from the third guide rollers. A flat plate is provided on the top of the support platform.

[0009] As a preferred technical solution of this application, the visual inspection component includes a third fixed frame fixedly connected to the top wall of the middle section of the support plate. A third cylinder is fixedly connected to the top wall of the third fixed frame. A transmission rod is rotatably connected to the output end of the third cylinder. An elongated through hole is opened at the end of the transmission rod. A second support frame is slidably connected to the inner side of the through hole. The second support frame is fixedly connected to the side wall of the third fixed frame. A lifting platform is slidably connected to the bottom wall of the middle section of the transmission rod. A visual inspection module is fixedly connected to the bottom end of the lifting platform. Two first sliding rods fixed to the two sides of the bottom wall of the third fixed frame are slidably connected to the two sides of the lifting platform. A guide plate is fixedly connected to the outer wall of the third fixed frame near the limiting frame. A roller is detachably connected to the middle section of one side of the guide plate. A third support frame is fixedly connected to the side wall of the third fixed frame. A support platform is fixedly connected to the bottom wall of the third support frame.

[0010] As a preferred technical solution of this application, the laser detection component includes a first support frame fixedly connected to the bottom wall of the middle section of the support plate, a laser scanning module fixedly connected to the middle section of the inner side of the first support frame, a first guide roller rotatably connected to the inner side of the top of the first support frame, and a second guide roller rotatably connected to the outer side of the top of the first support frame.

[0011] As a preferred technical solution of this application, the infrared imaging detection component includes a fifth fixed frame fixedly connected to the side wall of the controller. A fifth cylinder and a second limiting block are fixedly connected to the top wall of the fifth fixed frame. A fixed block is fixedly connected to the output end of the fifth cylinder. A third sliding rod is fixedly connected to the side of the fixed block near the second limiting block. The third sliding rod is slidably connected to the second limiting block. A sixth cylinder is fixedly connected to the side wall of the fixed block near the fifth fixed frame. A movable frame is fixedly connected to the output end of the sixth cylinder. A support block is fixedly connected to the outer wall of the movable frame away from the fifth cylinder. An infrared imaging detection module is detachably connected to the top of the outer wall of the support block away from the fifth cylinder. A sixth guide roller is rotatably connected to the top wall of the fixed block away from the fifth cylinder. A seventh guide roller is fixedly connected to the outer end of the sixth guide roller.

[0012] As a preferred technical solution of this application, the resistance detection assembly includes a fourth fixing frame fixedly connected to the top side wall of the controller, a first limiting block fixedly connected to the side wall of the fourth fixing frame, a fourth cylinder fixedly connected to the outer wall of the first limiting block away from the fourth fixing frame, a resistance detection module fixedly connected to the output end of the fourth cylinder, a second sliding rod fixedly connected to the top wall of the resistance detection module near the fourth fixing frame, the second sliding rod being slidably connected to the first limiting block, two fourth guide rollers rotatably connected to the inner bottom of the resistance detection module, and a fifth guide roller fixedly connected to the outer end of the fourth guide rollers.

[0013] As a preferred technical solution of this application, the winding assembly includes two seventh cylinders fixedly connected to the outer wall of the controller on the side away from the fourth fixed frame. The output end of the seventh cylinder is fixedly connected to a transmission arm. The middle section of the outer wall of the transmission arm on the side away from the fourth fixed frame is fixedly connected to a third motor. The output end of the third motor passes through the transmission arm and is fixedly connected to a rotating disk that rotates on the side wall of the controller. The end of the rotating disk on the side away from the third motor is detachably connected to a battery cell winding roller. The end of the battery cell winding roller is fixedly connected to a label paper winding roller.

[0014] As a preferred technical solution of this application, the marking assembly includes four eighth cylinders respectively fixedly connected to the top wall of the third support frame, the side wall of the first support frame, the side wall of the fixing block, and the top wall of the resistance detection module. A piston is slidably connected to the middle section of the inner side of each eighth cylinder. A lifting plate is fixedly connected to the bottom end of the piston. Two limiting rods are fixedly connected to the top walls on both sides of the lifting plate. A liquid storage bottle is threadedly connected to the outer side of the top of the limiting rod. A conveying cotton thread is fixedly connected to the inner side of the limiting rod. A marking sponge is fixedly connected to the bottom end of the conveying cotton thread. The marking sponge is fixedly connected to the lifting plate.

[0015] As a preferred technical solution of this application, the controller is fixedly connected to a first fixed frame on the outer wall away from the fifth fixed frame. A first motor is fixedly connected to the top wall of the first fixed frame. The output end of the first motor is fixedly connected to a connecting plate through the top wall of the first fixed frame. A rotating rod is fixedly connected to the side wall of the connecting plate. A first cylinder is fixedly connected to the top wall of the rotating rod. The output end of the first cylinder is rotatably connected to a connecting rod through the rotating rod. A synchronous toothed belt is rotatably connected to the bottom of the connecting plate. The synchronous toothed belt is fixedly connected to the bottom wall of the first fixed frame. The rotating end of the synchronous toothed belt near the first cylinder is fixedly connected to the connecting rod. A [missing information - likely a component or element] is fixedly connected to the middle section of the top wall of the rotating rod. A tensioning wheel is rotatably connected to a synchronous toothed belt. A second limiting frame is fixedly connected to the bottom end of the connecting rod. A sliding groove is provided on the bottom side wall of the second limiting frame. A second motor is fixedly connected to one outer wall of the second limiting frame. A first cleaning roller rotating inside the second limiting frame is fixedly connected to the output end of the second motor. A second cylinder is fixedly connected to the bottom wall of the second limiting frame. A transmission frame is fixedly connected to the output end of the second cylinder. The transmission frame is slidably connected to the side wall of the second limiting frame. A second cleaning roller is rotatably connected to the top of the transmission frame. A gear set is provided at the outer end of the second cleaning roller. The top gear of the gear set is fixedly connected to the rotating end of the first cleaning roller.

[0016] As a preferred technical solution of this application, a second fixed frame is fixedly connected to the outer wall of the controller on the side away from the fifth fixed frame. Two sealing chambers are fixedly connected to the outer end of the second fixed frame. The positions of the sealing chambers correspond to the positions of the first cleaning roller and the second cleaning roller, respectively. Multiple scrapers are fixedly connected to the inner side of the sealing chamber. The scrapers are slidably connected to the outer walls of the first cleaning roller and the second cleaning roller, respectively. A return pipe is fixedly connected to the side of the sealing chamber near the controller. Two exhaust fans are fixedly connected to the outer wall of the return pipe. Two sealing covers corresponding to the positions of the exhaust fans are fixedly connected to the outer wall of the return pipe. A filter canister is detachably connected to the outside of the sealing cover.

[0017] In the scheme of this application: 1. By combining multiple detection methods, the appearance, size, internal structure, and power conduction of the battery cells can be inspected, significantly improving the accuracy and comprehensiveness of the online detection device for battery cell winding defects. Real-time online detection ensures real-time monitoring of battery cell quality during the production process, timely detection of defects and prevention of defective battery cells from entering subsequent stages, reducing scrap rate and improving production efficiency. At the same time, the combination of multiple detection methods reduces human intervention and errors, lowers rework and repair costs, and ensures the consistency and reliability of battery cells. 2. By setting an eighth cylinder on the outside of each guide wheel and support platform, and an inner structure, the system marks the location of defects that occur during the inspection process. Different colors are used to distinguish the types of defects, making it more intuitive, facilitating rapid identification and handling, reducing operator judgment time, and improving inspection efficiency. This system not only supports real-time defect location but also provides a basis for subsequent processing, reducing rework and waste. At the same time, automated marking improves the working efficiency and intelligence level of the production line, reduces manual intervention, enhances quality traceability, helps analyze and improve the production process, ensures the consistency and reliability of battery cell products, and enhances market competitiveness. 3. After the battery cell passes through the flattening assembly, the second motor drives the first cleaning roller to rotate on both sides of the battery cell, thereby cleaning both sides and effectively removing impurities and oil stains from the surface of the battery cell. This ensures that the inspection process is not affected by external contaminants, thereby improving the accuracy and reliability of winding defect detection. The automated cleaning system reduces manual intervention, ensures consistent processing of each battery cell, and improves production efficiency and the automation level of the production line. 4. By adding a sealing chamber and scraper next to the first fixed frame, the first and second cleaning rollers are automatically cleaned, and the dust and other debris collected can be kept in good condition. This ensures the cleaning effect on the surface of the battery cell, thereby improving the accuracy and stability of winding defect detection. The sealing chamber effectively prevents dust from overflowing, reduces pollution to the detection environment and other equipment, and improves the production environment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a partial three-dimensional structural diagram of the limiting rod in this invention; Figure 4 This is a partial three-dimensional structural diagram of the limiting frame in this invention; Figure 5 This is a partial three-dimensional structural diagram of the first fixing frame in this invention; Figure 6 yes Figure 5 Enlarged view of a section at point B in the middle; Figure 7 This is a partial three-dimensional structural diagram of the second cylinder in this invention; Figure 8 This is a structural breakdown diagram of the third support frame in this invention; Figure 9 This is a schematic cross-sectional view of the third fixing frame in this invention; Figure 10 This is a schematic cross-sectional view of the eighth cylinder in this invention; Figure 11 This is a schematic cross-sectional view of the limiting rod in this invention; Figure 12 This is a schematic diagram of a partial three-dimensional structure at the second limiting block in this invention. Figure 1 ; Figure 13 This is a schematic diagram of a partial three-dimensional structure at the second limiting block in this invention. Figure 2 ; Figure 14 This is a partial three-dimensional structural diagram of the rotating disk in this invention; Figure 15 This is a partial three-dimensional structural diagram of the resistance detection module in this invention.

[0019] In the diagram: 1. Controller; 11. Main unit; 12. Support plate; 13. Control panel; 2. First support frame; 21. Laser scanning module; 22. First guide roller; 23. Second guide roller; 3. Limiting frame; 31. Bolt; 32. Slider; 33. First limiting frame; 34. Third guide roller; 35. Support platform; 36. Flat plate; 4. First fixing frame; 41. First motor; 42. Connecting plate; 43. Rotating rod; 44. First cylinder; 45. Connecting rod; 6. Synchronous toothed belt; 47. Tensioner pulley; 5. Second limit frame; 51. Second motor; 52. First cleaning roller; 53. Gear set; 54. Second cleaning roller; 55. Slide groove; 56. Second cylinder; 57. Transmission frame; 6. Second fixed frame; 61. Return pipe; 62. Sealing chamber; 63. Scraper; 64. Exhaust fan; 65. Sealing cover; 66. Filter canister; 7. Third fixed frame; 71. Third cylinder; 72. Transmission rod; 73. Second support frame; 74. Lifting platform; 75. Vision inspection module; 76. First slide bar; 77. Guide plate; 78. Third support frame; 79. Support platform; 710. Roller; 8. Fourth fixed frame; 81. First limit block; 82. Fourth cylinder; 83. Resistance detection module; 84. Second slide bar; 85. Fourth guide roller; 86. Fifth guide roller; 9. Fifth fixed frame; 91. Fifth cylinder; 92. Fixed block; 93. Third slide bar; 94. Second limit block; 95. Sixth cylinder; 96. Moving frame; 97. Support block; 98. Infrared imaging detection module; 99. Sixth guide roller; 910. Seventh guide roller; 10. Seventh cylinder; 101. Transmission arm; 102. Third motor; 103. Rotary disk; 104. Battery cell take-up roller; 105. Label take-up roller; 110. Eighth cylinder; 1101. Piston; 1102. Lifting plate; 1103. Limiting rod; 1104. Conveying cotton thread; 1105. Marking sponge; 1106. Liquid storage bottle. Detailed Implementation

[0020] 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. Example

[0021] Please see Figure 1-15 This embodiment proposes an online detection device for battery cell winding defects, including a controller 1, and further comprising: The main unit 11 is fixedly connected to the top wall of the controller 1 and is used to drive the device; The support plate 12 is fixedly connected to the middle section side wall of the main unit 11; The control console 13 is fixedly connected to the side wall of the main unit 11 and is used to control the equipment. The main unit 11 integrates a control system (the control system is existing technology, referring to existing commercial detection systems, and will not be described). The control console 13 sends commands into the main unit 11, and the main unit 11 receives control signals and sends them to various terminals in the equipment (the terminals are various drive devices, such as cylinders, motors, and sensors), thereby adjusting the operation of the equipment. A flattening assembly is located at one end of the support plate 12 to flatten the battery cell before cell testing; A visual inspection component is installed on the top wall of the middle section of the support plate 12 and is used for visual inspection of cell appearance defects. A laser inspection component is located at the bottom of the middle section of the support plate 12 and is used for visual inspection of the geometric appearance of the battery cell. An infrared imaging detection component is located at the end of the support plate 12 away from the flattening component, and is used to detect local thermal anomalies in the battery cell after a small current is applied. A resistance detection component is located in the middle section of the top side wall of controller 1 and is used to detect the internal electrical performance of the battery cell. The winding assembly, located in the middle section of controller 1, is used to wind up the battery cells; Four sets of marking components are respectively set on the outside of the detection ends of the vision inspection component, laser inspection component, infrared imaging inspection component, and resistance inspection component (the vision inspection component, laser inspection component, infrared imaging inspection component, and resistance inspection component are all existing technologies, and will not be described in detail, referring to existing vision, laser, infrared, and resistance sensors). They record the detection results for each time and mark the defect locations respectively.

[0022] like Figure 1-15 As shown, in a preferred embodiment, based on the above method, the flattening component further includes a limiting frame 3 fixedly connected to the top wall of one end of the support plate 12. The side wall of the limiting frame 3 is rotatably connected to a bolt 31 that passes through both side walls of the limiting frame 3. A slider 32 is threadedly connected to the outer side of the middle section of the bolt 31. The slider 32 is slidably connected to the inner side wall of the limiting frame 3. Two sets of first limiting frames 33 are fixedly connected to the top wall of the slider 32. Two third guide rollers 34 are rotatably connected to the outer wall of the limiting frame 3 on the side away from the infrared imaging detection component. A support platform 35 is fixedly connected to the outer wall of the limiting frame 3 on the side away from the third guide rollers 34. A flat plate 36 is provided on the top of the support platform 35. By rotating the bolt 31, the slider 32 can be moved laterally inside the limit frame 3, thereby causing the first limit frame 33 at the top to move synchronously, thus fine-tuning the feeding position of the battery cell. Then, the flat plate 36 and the support platform 35 cooperate to flatten the battery cell. At the same time, the bolts and springs at the top of the flat plate 36 and the support platform 35 are connected synchronously. The bolts are threaded to the top of the support platform 35 and support the flat plate 36, so that the flat plate 36 is always in contact with the support platform 35, but the pressure is controllable.

[0023] The visual inspection component includes a third fixed frame 7 fixedly connected to the top wall of the middle section of the support plate 12. A third cylinder 71 is fixedly connected to the top wall of the third fixed frame 7. A transmission rod 72 is rotatably connected to the output end of the third cylinder 71. A long through hole is opened at the end of the transmission rod 72. A second support frame 73 is slidably connected to the inside of the through hole. The second support frame 73 is fixedly connected to the side wall of the third fixed frame 7. A lifting platform 74 is slidably connected to the bottom wall of the middle section of the transmission rod 72. A visual inspection module 75 is fixedly connected to the bottom end of the lifting platform 74. Two first sliding rods 76 fixed to the bottom walls of the third fixed frame 7 are slidably connected to the inside of the two sides of the lifting platform 74. A guide plate 77 is fixedly connected to the outer wall of the third fixed frame 7 near the limit frame 3. A roller 710 is detachably connected to the middle section of one side of the guide plate 77. A third support frame 78 is fixedly connected to the side wall of the third fixed frame 7. A support platform 79 is fixedly connected to the bottom wall of the third support frame 78. The third cylinder 71 drives the end of the transmission rod 72 to move downward. During this process, the transmission rod 72 drives the lifting platform 74 and the vision inspection module 75 to move synchronously, thereby controlling the distance between the vision inspection module 75 and the battery cell. This allows the vision inspection module 75 to focus better and inspect the appearance of both sides of the battery cell to detect defects such as electrode folding, breakage, misalignment, and dirt. The surface, electrode edges, and ends of the wound battery cell are photographed. The images are then processed with grayscale conversion, noise reduction, and edge enhancement to improve inspection accuracy. Defects such as folding, scratches, and misalignment are identified through algorithms such as template matching and convolutional neural networks. The location and type of defects are output to the control system. At the same time, the battery cell is transported out through the gap between the third support frame 78 and the support platform 79 via the winding wheel 710.

[0024] The laser detection assembly includes a first support frame 2 fixedly connected to the bottom wall of the middle section of the support plate 12, a laser scanning module 21 fixedly connected to the middle section of the inner side of the first support frame 2, a first guide roller 22 rotatably connected to the inner top of the first support frame 2, and a second guide roller 23 rotatably connected to the outer top of the first support frame 2. The laser scanning module 21 detects the battery cells passing the bottom of the first guide roller 22 to check for abnormalities in the winding geometry, such as uneven thickness, outer diameter deviation, and uneven tension. The laser line or point scans the surface of the battery cells to obtain contour data, generate two-dimensional / three-dimensional contour maps, calculate the thickness, diameter, and winding density, compare the measured data with standard values, and identify local thickness discrepancies, winding abnormalities, or edge warping.

[0025] The infrared imaging detection assembly includes a fifth fixed frame 9 fixedly connected to the side wall of the controller 1. A fifth cylinder 91 is fixedly connected to the side wall of the fifth fixed frame 9, and a second limiting block 94 is fixedly connected to the top wall of the fifth fixed frame 9. A fixed block 92 is fixedly connected to the output end of the fifth cylinder 91. A third slide rod 93 is fixedly connected to the side of the fixed block 92 near the second limiting block 94. The third slide rod 93 is slidably connected to the second limiting block 94. A sixth cylinder 95 is fixedly connected to the side wall of the fixed block 92 near the fifth fixed frame 9. A movable frame 96 is fixedly connected to the output end of the sixth cylinder 95. A support block 97 is fixedly connected to the outer wall of the movable frame 96 away from the fifth cylinder 91. An infrared imaging detection module 98 is detachably connected to the top of the outer wall of the support block 97 away from the fifth cylinder 91. A sixth guide roller 99 is rotatably connected to the top wall of the fixed block 92 away from the fifth cylinder 91. A seventh guide roller 910 is fixedly connected to the outer end of the sixth guide roller 99. The battery cell is guided by the sixth guide roller 99 and moved upwards. At the same time, the fifth cylinder 91 drives the fixed block 92 and the top structure of the fixed block 92 to move laterally, thereby controlling the tension of the battery cell. Simultaneously, the sixth cylinder 95 drives the moving frame 96, the support block 97, and the infrared imaging detection module 98 to move laterally, thereby enabling infrared detection of different positions of the battery cell. The sixth guide roller 99 itself can be electrically connected to an external power source, thereby supplying a small current to the battery cell to create a temperature difference in possible defective areas. Then, the infrared imaging detection module 98 captures the heat distribution on the surface of the battery cell, identifies local overheated areas, infers internal short circuits or abnormal compactness, and marks the defective battery cell.

[0026] The resistance detection assembly includes a fourth fixed frame 8 fixedly connected to the top side wall of the controller 1. A first limiting block 81 is fixedly connected to the side wall of the fourth fixed frame 8. A fourth cylinder 82 is fixedly connected to the outer wall of the first limiting block 81 away from the fourth fixed frame 8. A resistance detection module 83 (which integrates a power output component for outputting a small current to the battery cell) is fixedly connected to the output end of the fourth cylinder 82. A second slide rod 84 is fixedly connected to the top wall of the resistance detection module 83 near the fourth fixed frame 8. The second slide rod 84 is slidably connected to the first limiting block 81. Two fourth guide rollers 85 are rotatably connected to the inner bottom of the resistance detection module 83. A fifth guide roller 86 is fixedly connected to the outer end of the fourth guide rollers 85. The fourth cylinder 82 drives the bottom resistance detection module 83 and the fourth guide roller 85 to move synchronously, thereby adjusting the height of the fourth guide roller 85 and assisting in the tension control of the battery cell. The bottom resistance detection module 83 detects internal electrical performance or structural defects, such as short circuits, open circuits, voids, and folds. The detection end of the resistance detection module 83 is aligned with the surface of the battery cell and a small current is applied to measure the continuity or resistance change, collect the resistance value signal, and identify short circuits, open circuits, internal voids, or interlayer non-bonding by comparing with standard thresholds. The abnormal information is output to the control system for marking.

[0027] The winding assembly includes two seventh cylinders 10 fixedly connected to the outer wall of the controller 1 on the side away from the fourth fixed frame 8. The output end of the seventh cylinder 10 is fixedly connected to a transmission arm 101. The middle section of the outer wall of the transmission arm 101 on the side away from the fourth fixed frame 8 is fixedly connected to a third motor 102. The output end of the third motor 102 passes through the transmission arm 101 and is fixedly connected to a rotating disk 103 that rotates on the side wall of the controller 1. The end of the rotating disk 103 on the side away from the third motor 102 is detachably connected to a battery cell winding roller 104. The end of the battery cell winding roller 104 is fixedly connected to a label paper winding roller 105. The seventh cylinder 10 drives the third motor 102 to move via the transmission arm 101, thereby controlling the relative position of the battery cell take-up roller 104 and the label take-up roller 105 with other components. The third motor 102 drives the rotating disk 103, the battery cell take-up roller 104 and the label take-up roller 105 to rotate, so that the battery cell is wound up by the battery cell take-up roller 104 and the label paper is wound up by the label paper take-up roller 105.

[0028] The marking assembly includes four eighth cylinders 110, which are respectively fixedly connected to the top wall of the third support frame 78, the side wall of the first support frame 2, the side wall of the fixing block 92, and the top wall of the resistance detection module 83. A piston 1101 is slidably connected to the middle section of the inner side of the eighth cylinder 110. A lifting plate 1102 is fixedly connected to the bottom end of the piston 1101. Two limiting rods 1103 are fixedly connected to the top walls on both sides of the lifting plate 1102. A liquid storage bottle 1106 is threadedly connected to the outer side of the top of the limiting rod 1103. A conveying cotton thread 1104 is fixedly connected to the inner side of the limiting rod 1103. A marking sponge 1105 is fixedly connected to the bottom end of the conveying cotton thread 1104. The marking sponge 1105 is fixedly connected to the lifting plate 1102. After the control system receives signals from each detection component, it controls the eighth cylinder 110 to drive the piston 1101 to move outward, and drives the lifting plate 1102 and the limit rod 1103 to move, so that the marking sponge 1105 is in contact with the label paper and the marking sponge 1105 is colored. During the process, the pigment stored in the liquid storage bottle 1106 is transferred to the marking sponge 1105 through the conveying cotton thread 1104, and the length and position of the defect on the battery cell are accurately marked according to the marking length. The user only needs to judge the type and length of the defect of the battery cell by the color and length of the marking on the label paper.

[0029] A first fixed frame 4 is fixedly connected to the outer wall of the controller 1 on the side away from the fifth fixed frame 9. A first motor 41 is fixedly connected to the top wall of the first fixed frame 4. A connecting plate 42 is fixedly connected to the output end of the first motor 41 through the top wall of the first fixed frame 4. A rotating rod 43 is fixedly connected to the side wall of the connecting plate 42. A first cylinder 44 is fixedly connected to the top wall of the rotating rod 43. A connecting rod 45 is rotatably connected to the output end of the first cylinder 44 through the rotating rod 43. A synchronous toothed belt 46 is rotatably connected to the bottom of the connecting plate 42. The synchronous toothed belt 46 is fixedly connected to the bottom wall of the first fixed frame 4. The rotating end of the synchronous toothed belt 46 near the first cylinder 44 is fixedly connected to the connecting rod 45. A tensioning wheel 47 is fixedly connected to the middle section of the top wall of the rotating rod 43. The tensioning wheel 47 is rotatably connected to the synchronous toothed belt 46. The bottom end of the connecting rod 45 is fixedly connected to the second limiting frame 5. The bottom side wall of the second limiting frame 5 is provided with a sliding groove 55. The outer side wall of the second limiting frame 5 is fixedly connected to the second motor 51. The output end of the second motor 51 is fixedly connected to the first cleaning roller 52 that rotates inside the second limiting frame 5. The bottom wall of the second limiting frame 5 is fixedly connected to the second cylinder 56. The output end of the second cylinder 56 is fixedly connected to the transmission frame 57. The transmission frame 57 is slidably connected to the side wall of the second limiting frame 5. The top end of the transmission frame 57 is rotatably connected to the second cleaning roller 54. The outer end of the second cleaning roller 54 is provided with a gear set 53. The top gear of the gear set 53 is fixedly connected to the rotating end of the first cleaning roller 52. The second motor 51 drives the first cleaning roller 52 to rotate in the opposite direction to the direction of the battery cell's movement. At the same time, the gear set 53 drives the second cleaning roller 54 at the bottom to rotate synchronously, thereby cleaning both sides of the battery cell. The outer layer of the first cleaning roller 52 and the second cleaning roller 54 is made of flexible material, so that the cleaning of the battery cell will not cause damage to both sides of the battery cell.

[0030] A second fixed frame 6 is fixedly connected to the outer wall of the controller 1 on the side away from the fifth fixed frame 9. Two sealing chambers 62 are fixedly connected to the outer end of the second fixed frame 6. The positions of the sealing chambers 62 correspond to the positions of the first cleaning roller 52 and the second cleaning roller 54, respectively. Multiple scrapers 63 are fixedly connected to the inner side of the sealing chambers 62. The scrapers 63 are slidably connected to the outer walls of the first cleaning roller 52 and the second cleaning roller 54, respectively. A return pipe 61 is fixedly connected to the side of the sealing chamber 62 near the controller 1. Two exhaust fans 64 are fixedly connected to the outer wall of the return pipe 61. Two sealing covers 65 corresponding to the positions of the exhaust fans 64 are fixedly connected to the outer wall of the return pipe 61. A filter canister 66 is detachably connected to the outer side of the sealing cover 65. When cleaning the first cleaning roller 52 and the second cleaning roller 54, the equipment stops operating, and the first motor 41 drives the connecting plate 42 to rotate at the top of the synchronous toothed belt 46. The connecting plate 42, through the rotating rod 43, drives the first cleaning roller 52 and the second cleaning roller 54 to rotate 90 degrees. Simultaneously, the synchronous toothed belt 46 limits the connecting rod 45, causing the first cleaning roller 52 and the second cleaning roller 54 to rotate on their own axis while following the rotation of the rotating rod 43. The second limiting frame 5 rotates 90 degrees in the opposite direction to the rotation of the rotating rod 43, bringing the first cleaning roller 52 and the second cleaning roller 54 into contact with the corresponding scraper 63. Then, the second motor 51 drives the first cleaning roller 52 and the second cleaning roller 54 to continue rotating, thereby passing through the scraper 63... 3. The first cleaning roller 52 and the second cleaning roller 54 are cleaned. When the first cleaning roller 52 and the second cleaning roller 54 pass over the outer wall of the scraper 63, the vibration caused by the protrusion will cause the dust to be raised. The dust is then extracted by the exhaust fan 64 and the air is sent into the filter barrel 66 to filter the dust. When the first cleaning roller 52 and the second cleaning roller 54 are reset, the transmission frame 57 can be moved to the bottom by the second cylinder 56 at the bottom. The transmission frame 57 drives the second cleaning roller 54 and the gear at the bottom of the gear set 53 to move down synchronously, widening the gap between the first cleaning roller 52 and the second cleaning roller 54. After moving to the outside of the battery cell, the second cleaning roller 54 is moved up to fit against the lower surface of the battery cell to continue cleaning the battery cell.

[0031] Specifically, when using this online detection device for cell winding defects: First, the battery cell is guided by the third guide roller 34, passes through the first limiting frame 33, and enters between the support platform 35 and the flat plate 36. Then, the support platform 35 and the flat plate 36 flatten the battery cell. The battery cell then passes between the first cleaning roller 52 and the second cleaning roller 54. At the same time, the first cleaning roller 52 is driven to rotate by the second motor 51, and the second cleaning roller 54 at the bottom is driven to rotate synchronously by the gear set 53, thereby cleaning both sides of the battery cell. Then the battery cell continues to move forward, passes through the guide plate 77 and enters the bottom of the vision inspection module 75. The vision inspection module 75 inspects the outside of the battery cell to check for defects and uploads the inspection results to the control system. Then, the battery cell passes through the second guide roller 23 and moves toward the sixth guide roller 99. During this process, the geometry of the battery cell is monitored by the laser scanning module 21 to check for any abnormalities, and the detection results are uploaded to the control system. When the battery cell passes through the sixth guide roller 99, a small current is supplied to the battery cell through the sixth guide roller 99 to generate a temperature difference in the possible defect area. Then, the infrared imaging detection module 98 captures the heat distribution on the surface of the battery cell and uploads the detection results to the control system. The battery cell is then inserted into the resistance detection module 83. The resistance detection module 83 aligns the detection end with the surface of the battery cell and applies a small current to measure the continuity or resistance change, collect the resistance value signal, and identify short circuit, open circuit, internal void or interlayer non-bonding by comparing with standard threshold. The abnormal information is output to the control system for marking. The battery cell is then wound onto the battery cell take-up roller 104. The third motor 102 drives the rotating disk 103 to rotate, which in turn drives the battery cell take-up roller 104 and the label take-up roller 105 to rotate synchronously, thereby winding and storing the battery cell. During the process, the label paper on the roll 710 moves synchronously with the battery cell by being guided by the support platform 79, the second guide roller 23, the seventh guide roller 910 and the fifth guide roller 86. Finally, it is wound up by the label paper take-up roller 105 and stored synchronously with the battery cell outside the battery cell take-up roller 104. During the testing process of multiple testing components, if a defect exists in the battery cell, the piston 1101 will be driven to move outward by the eighth cylinder 110 at the corresponding position of the control system, which will also drive the lifting plate 1102 and the limit rod 1103 to move, so that the marking sponge 1105 is attached to the label paper and colored. During the process, the pigment stored in the liquid storage bottle 1106 is transferred to the marking sponge 1105 through the conveying cotton thread 1104, and the length and position of the defect on the battery cell are accurately marked according to the marking length. This allows the user to determine the type and length of the defect in the battery cell simply by looking at the color and length of the marking on the label paper.

[0032] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0033] 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. An online detection device for battery cell winding defects, comprising a controller, characterized in that, Also includes: The main unit, fixedly connected to the top wall of the controller, is used to drive the device; The support plate is fixedly connected to the side wall of the middle section of the main unit; The control panel is fixedly connected to the side wall of the main unit and is used to control the equipment. A flattening component is located at one end of the support plate; A visual inspection component is installed on the top wall of the middle section of the support plate and is used for visual inspection of cell appearance defects. A laser inspection component is located at the bottom of the middle section of the support plate and is used for visual inspection of the geometric appearance of the battery cell. An infrared imaging detection component is located at the end of the support plate away from the flattening component, and is used to detect local thermal anomalies in the battery cell after a small current is applied. A resistance detection component is located in the middle section of the top side wall of the controller and is used to detect the internal electrical performance of the battery cell. The winding assembly, located in the middle of the controller, is used to wind up the battery cells; Four sets of marking components are respectively set on the outside of the detection ends of the vision inspection component, laser inspection component, infrared imaging inspection component, and resistance inspection component to record the detection results each time and mark the defect location.

2. The online detection device for cell winding defects according to claim 1, characterized in that, The flattening assembly includes a limiting frame fixedly connected to the top wall of one end of the support plate. Bolts are rotatably connected to the side wall of the limiting frame, passing through both side walls of the limiting frame. A slider is threadedly connected to the outer side of the middle section of the bolt. The slider is slidably connected to the inner side wall of the limiting frame. Two sets of first limiting frames are fixedly connected to the top wall of the slider. Two third guide rollers are rotatably connected to the outer wall of the limiting frame away from the infrared imaging detection assembly. A support platform is fixedly connected to the outer wall of the limiting frame away from the third guide rollers. A flat plate is provided on the top of the support platform.

3. The online detection device for cell winding defects according to claim 2, characterized in that, The visual inspection component includes a third fixed frame fixedly connected to the top wall of the middle section of the support plate. A third cylinder is fixedly connected to the top wall of the third fixed frame. A transmission rod is rotatably connected to the output end of the third cylinder. An elongated through hole is opened at the end of the transmission rod. A second support frame is slidably connected to the inside of the through hole. The second support frame is fixedly connected to the side wall of the third fixed frame. A lifting platform is slidably connected to the bottom wall of the middle section of the transmission rod. A visual inspection module is fixedly connected to the bottom end of the lifting platform. Two first sliding rods fixed to the bottom walls of the third fixed frame are slidably connected to the inside of the two sides of the lifting platform. A guide plate is fixedly connected to the outer wall of the third fixed frame near the limiting frame. A roller is detachably connected to the middle section of one side of the guide plate. A third support frame is fixedly connected to the side wall of the third fixed frame. A support platform is fixedly connected to the bottom wall of the third support frame.

4. The online detection device for cell winding defects according to claim 3, characterized in that, The laser detection assembly includes a first support frame fixedly connected to the bottom wall of the middle section of the support plate, a laser scanning module fixedly connected to the middle section of the inner side of the first support frame, a first guide roller rotatably connected to the inner side of the top of the first support frame, and a second guide roller rotatably connected to the outer side of the top of the first support frame.

5. The online detection device for cell winding defects according to claim 4, characterized in that, The infrared imaging detection assembly includes a fifth fixed frame fixedly connected to the side wall of the controller. A fifth cylinder is fixedly connected to the side wall of the fifth fixed frame, and a second limiting block is fixedly connected to the top wall of the fifth fixed frame. A fixed block is fixedly connected to the output end of the fifth cylinder. A third sliding rod is fixedly connected to the side of the fixed block near the second limiting block. The third sliding rod is slidably connected to the second limiting block. A sixth cylinder is fixedly connected to the side wall of the fixed block near the fifth fixed frame. A movable frame is fixedly connected to the output end of the sixth cylinder. A support block is fixedly connected to the outer wall of the movable frame away from the fifth cylinder. An infrared imaging detection module is detachably connected to the top of the outer wall of the support block away from the fifth cylinder. A sixth guide roller is rotatably connected to the top wall of the fixed block away from the fifth cylinder. A seventh guide roller is fixedly connected to the outer end of the sixth guide roller.

6. The online detection device for cell winding defects according to claim 5, characterized in that, The resistance detection assembly includes a fourth fixed frame fixedly connected to the top side wall of the controller. A first limiting block is fixedly connected to the side wall of the fourth fixed frame. A fourth cylinder is fixedly connected to the outer wall of the first limiting block away from the fourth fixed frame. A resistance detection module is fixedly connected to the output end of the fourth cylinder. A second sliding rod is fixedly connected to the top wall of the resistance detection module near the fourth fixed frame. The second sliding rod is slidably connected to the first limiting block. Two fourth guide rollers are rotatably connected to the inner bottom of the resistance detection module. A fifth guide roller is fixedly connected to the outer end of the fourth guide rollers.

7. The online detection device for cell winding defects according to claim 6, characterized in that, The winding assembly includes two seventh cylinders fixedly connected to the outer wall of the controller on the side away from the fourth fixed frame. The output end of the seventh cylinder is fixedly connected to a transmission arm. The middle section of the outer wall of the transmission arm on the side away from the fourth fixed frame is fixedly connected to a third motor. The output end of the third motor passes through the transmission arm and is fixedly connected to a rotating disk that rotates on the side wall of the controller. The end of the rotating disk on the side away from the third motor is detachably connected to a battery cell winding roller. The end of the battery cell winding roller is fixedly connected to a label paper winding roller.

8. The online detection device for cell winding defects according to claim 7, characterized in that, The marking assembly includes four eighth cylinders respectively fixedly connected to the top wall of the third support frame, the side wall of the first support frame, the side wall of the fixing block, and the top wall of the resistance detection module. A piston is slidably connected to the middle section of the inner side of each eighth cylinder. A lifting plate is fixedly connected to the bottom end of the piston. Two limiting rods are fixedly connected to the top walls on both sides of the lifting plate. A liquid storage bottle is threaded to the outer side of the top of the limiting rod. A conveying cotton thread is fixedly connected to the inner side of the limiting rod. A marking sponge is fixedly connected to the bottom end of the conveying cotton thread. The marking sponge is fixedly connected to the lifting plate.

9. The online detection device for cell winding defects according to claim 8, characterized in that, The controller is fixedly connected to a first fixed frame on the outer wall away from the fifth fixed frame. A first motor is fixedly connected to the top wall of the first fixed frame. The output end of the first motor passes through the top wall of the first fixed frame and is fixedly connected to a connecting plate. A rotating rod is fixedly connected to the side wall of the connecting plate. A first cylinder is fixedly connected to the top wall of the rotating rod. The output end of the first cylinder passes through the rotating rod and is rotatably connected to a connecting rod. A synchronous toothed belt is rotatably connected to the bottom of the connecting plate. The synchronous toothed belt is fixedly connected to the bottom wall of the first fixed frame. The rotating end of the synchronous toothed belt near the first cylinder is fixedly connected to the connecting rod. A tensioning wheel is fixedly connected to the middle section of the top wall of the rotating rod. The tensioning wheel is rotatably connected to the synchronous toothed belt. A second limiting frame is fixedly connected to the bottom end of the connecting rod. A sliding groove is opened on the bottom side wall of the second limiting frame. A second motor is fixedly connected to one outer wall of the second limiting frame. A first cleaning roller rotating inside the second limiting frame is fixedly connected to the output end of the second motor. A second cylinder is fixedly connected to the bottom wall of the second limiting frame. A transmission frame is fixedly connected to the output end of the second cylinder. The transmission frame is slidably connected to the side wall of the second limiting frame. A second cleaning roller is rotatably connected to the top end of the transmission frame. A gear set is provided at the outer end of the second cleaning roller. The top gear of the gear set is fixedly connected to the rotating end of the first cleaning roller.

10. The online detection device for cell winding defects according to claim 9, characterized in that, A second fixed frame is fixedly connected to the outer wall of the controller on the side away from the fifth fixed frame. Two sealing chambers are fixedly connected to the outer end of the second fixed frame. The positions of the sealing chambers correspond to the positions of the first cleaning roller and the second cleaning roller, respectively. Multiple scrapers are fixedly connected to the inner side of the sealing chambers. The scrapers are slidably connected to the outer walls of the first cleaning roller and the second cleaning roller, respectively. A return pipe is fixedly connected to the side of the sealing chamber near the controller. Two exhaust fans are fixedly connected to the outer wall of the return pipe. Two sealing covers corresponding to the positions of the exhaust fans are fixedly connected to the outer wall of the return pipe. A filter canister is detachably connected to the outside of the sealing cover.

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