Electrode Surface Defect Detection Device

Abstract

The utility model discloses an electrode piece surface defect detection device, including support frame, conveying assembly, moving assembly and detection component, conveying assembly and moving assembly all install on support frame, detection component installs on moving assembly, moving assembly is located the top of conveying assembly, moving assembly includes transverse U -shaped frame and longitudinal U -shaped frame, transverse U -shaped frame is fixedly connected with support frame, longitudinal U -shaped frame is vertically arranged with transverse U -shaped frame, the top of longitudinal U -shaped frame is equipped with the sliding seat of sliding, the bottom of sliding seat is equipped with sliding plate, and detection component is located the below of sliding plate. This scheme can be convenient according to the different area of electrode piece on defect prone to targeted detection.

Description

Technical Field

[0001] This utility model belongs to the field of electrode testing technology, specifically relating to an electrode surface defect detection device. Background Technology

[0002] Electrodes are a crucial component of lithium-ion batteries, and their surface quality directly affects the battery's capacity, consistency, and lifespan. During electrode production, processes such as coating, rolling, and slicing can easily lead to defects on the electrode surface, such as pinholes, scratches, powder shedding, and uneven coating. If these defects are not detected and removed in a timely manner, they may result in internal short circuits, capacity decay, or even safety accidents within the battery.

[0003] Chinese Patent Application No. 202122021818X discloses an electrode defect detection device, comprising: a conveying mechanism including a conveyor belt for conveying electrode sheets; a pressure roller rotatably disposed above the conveyor belt for flattening the electrode sheets; and a visual inspection mechanism disposed on one side of the conveyor belt for acquiring images of the electrode sheets to detect whether the electrode sheets have defects. The above-mentioned electrode defect detection device can detect die-cut electrode sheets with high accuracy.

[0004] Similar to the solutions mentioned above, existing electrode surface defect detection devices mostly employ a fixed camera paired with a conveyor belt to inspect the electrode surface from a single shooting position. However, this method has shortcomings: the camera position cannot be flexibly adjusted, and electrodes of different models or production batches may vary significantly in length and defect distribution. Current technology cannot adjust the camera to the optimal detection point, making it difficult to perform targeted inspections of electrodes of different sizes or areas with concentrated defects, and easily leading to blind spots in the detection process. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an electrode surface defect detection device, comprising a support frame, a conveying assembly, a moving assembly, and a detection assembly. The conveying assembly and the moving assembly are both mounted on the support frame, and the detection assembly is mounted on the moving assembly. The moving assembly is positioned above the conveying assembly. The moving assembly includes a transverse U-shaped frame and a longitudinal U-shaped frame. The transverse U-shaped frame is fixedly connected to the support frame, and the longitudinal U-shaped frame is perpendicular to the transverse U-shaped frame. A sliding seat is slidably provided at the top of the longitudinal U-shaped frame, and a sliding plate is provided at the bottom of the sliding seat. The detection assembly is positioned below the sliding plate.

[0006] Preferably, the bottom side of the sliding plate is provided with a connecting plate, and the bottom of the connecting plate is provided with a lighting device. The lighting device includes a square frame, and LED light strips are embedded on the four bottom sides of the square frame.

[0007] Preferably, the transverse U-shaped frame is provided with slide rails on both sides, and the longitudinal U-shaped frame is provided with a slide groove on the lower side. The longitudinal U-shaped frame is slidably connected to the transverse U-shaped frame, and a locking bolt is provided below the slide groove.

[0008] Preferably, the conveying assembly includes a conveying frame connected to a support frame, the conveying frame having conveying rollers, and the conveying rollers having a conveyor belt.

[0009] Preferably, the LED light strip includes infrared LED light strips and ultraviolet LED light strips.

[0010] The advantages of this utility model are: 1. This solution combines a horizontal U-shaped frame with a vertical U-shaped frame, and the sliding seat moves bidirectionally in both the longitudinal and width directions. The adjustable position ensures that the camera's field of view can cover the key detection area. Once fixed, the coverage area remains stable and consistent, thereby reducing missed detections.

[0011] 2. The detection components of this solution, in conjunction with a multi-source illumination device, can provide optimal lighting conditions for different surface materials and defect types, enhance image contrast, and thus improve the accuracy and stability of defect identification.

[0012] 3. The locking bolts in this solution can firmly fix the longitudinal U-shaped frame after adjustment to the target position, preventing positional shifts caused by vibration or impact during the testing process. This facilitates quick adjustment of the testing position and ensures the stability and repeatability of the testing process. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present utility model.

[0014] Figure 2 This is a structural diagram of the mobile component of this utility model.

[0015] Figure 3 This is a front view structural diagram of the mobile component of this utility model.

[0016] Figure 4 This is a side view of the mobile component of this utility model.

[0017] In the diagram: 1 Support frame, 2 Horizontal U-shaped frame, 3 Vertical U-shaped frame, 4 Sliding seat, 5 Sliding plate, 6 Connecting plate, 7 Square frame, 8 LED light strip, 9 Slide rail, 10 Slide groove, 11 Locking bolt, 12 Conveyor frame, 13 Conveyor roller, 14 Conveyor belt, 15 High-definition industrial camera. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Simultaneously, when an component is referred to as "fixed to" or "equipped on" another component, it can be directly on the other component or may have an intervening component present. When an component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present. When an component is referred to as "fixedly connected to" another component, it can be a common fixed connection method such as welding, bolting, or gluing. In short, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1, such as Figure 1-4 As shown, an electrode surface defect detection device includes a support frame 1, a conveying assembly, a moving assembly, and a detection assembly. The support frame 1 is constructed from welded steel profiles or assembled from aluminum profiles, possessing high stability and load-bearing capacity, and serves as the installation foundation and support for the entire detection device.

[0022] Both the conveying assembly and the moving assembly are mounted on the support frame 1. The conveying assembly is located in the lower region of the support frame 1 and is used to carry and convey the electrode sheets. The moving assembly is located above the conveying assembly and is used to support and adjust the position of the detection assembly.

[0023] The detection component is installed below the moving component and includes a high-definition industrial camera 15, which can acquire high-resolution image information of the electrode surface and transmit the image to a computer or image processing system for defect analysis and judgment.

[0024] Combination Figure 1Regarding the conveying components, a conveyor frame 12 is fixedly connected to the lower part of the support frame 1. Multiple parallel conveyor rollers 13 are mounted on the conveyor frame 12. The conveyor rollers 13 are supported on the conveyor frame 12 by bearings and are covered with a wear-resistant rubber layer to increase friction with the electrode sheets and prevent slippage during conveying. The surface finish of the conveyor rollers 13 is highly precise, ensuring smooth conveying and preventing vibration from affecting the camera's imaging quality. A conveyor belt 14 is provided around the outer ring of the conveyor rollers 13. The conveyor belt 14 is made of anti-static material, which can both smoothly convey the electrode sheets and effectively reduce the impact of static electricity on detection accuracy. The conveyor rollers 13 are connected to a drive chain via sprockets and are driven by a motor, enabling continuous or intermittent operation of the conveyor belt 14, facilitating control of the detection rhythm as needed.

[0025] The moving assembly includes a transverse U-shaped frame 2 and a longitudinal U-shaped frame 3. The transverse U-shaped frame 2 is fixedly connected to the support frame 1 at both ends and is arranged horizontally to support the longitudinal U-shaped frame 3 and provide sliding guidance. The longitudinal U-shaped frame 3 is perpendicular to the transverse U-shaped frame 2 and can slide along the length of the conveyor belt 14.

[0026] A sliding seat 4 is slidably mounted on the top of the longitudinal U-shaped frame 3. The sliding seat 4 can move along the guide surface at the top of the longitudinal U-shaped frame 3, thereby causing the detection component below to change position. The detection component can reciprocate along the width direction of the conveyor belt 14.

[0027] A sliding plate 5 is installed at the bottom of the sliding base 4. The sliding plate 5 is made of metal plate or high-strength engineering plastic plate and is used to support the camera and ensure its smooth operation. A high-definition industrial camera 15 is fixedly installed at the center of the bottom of the sliding plate 5. The lens of the high-definition industrial camera 15 faces downward and is aligned with the electrode plate on the conveying assembly to ensure the stability and accuracy of image acquisition during the detection process.

[0028] To ensure high-quality detection images under different lighting conditions, this embodiment adds a connecting plate 6 to the bottom side of the sliding plate 5. The connecting plate 6 extends downward and has an illumination device installed at its bottom end. The illumination device adopts a wraparound square frame 7 structure. The square frame 7 is made of metal profiles or high-strength plastic, and LED light strips 8 are embedded in its four bottom edges. The LED light strips 8 are evenly distributed along the circumference of the frame to form a uniform and blind-angle-free illumination effect.

[0029] In practical implementation, the LED light strip 8 includes two types: infrared LED light strip and ultraviolet LED light strip. It can be switched according to the reflective characteristics of the electrode surface, material color, and defect type. For example, infrared light can enhance the ability to identify fine scratches and microcracks on the surface, while ultraviolet light can make uneven coating or trace foreign objects form a clear contrast in the image, thereby improving the accuracy of defect detection.

[0030] To achieve smooth adjustment in both the horizontal and vertical directions, in this embodiment, the horizontal U-shaped frame 2 is provided with parallel slide rails 9 on both sides, and the lower side of the vertical U-shaped frame 3 is provided with a slide groove 10 that cooperates with the slide rails 9. Through the cooperation of the slide groove 10 and the slide rails 9, the vertical U-shaped frame 3 can move smoothly in the horizontal direction. At the same time, a locking bolt 11 is provided below the slide groove 10. After adjustment to the desired position, the vertical U-shaped frame 3 can be fixed in the designated position of the horizontal U-shaped frame 2 by tightening the locking bolt 11, preventing positional displacement due to vibration or other external forces during the testing process.

[0031] In use, the electrode to be inspected is placed on the conveyor belt 14 of the conveyor assembly. The drive motor moves the conveyor belt, causing the electrode to move along the conveying direction to the inspection area. By adjusting the relative position of the sliding seat 4, the inspection position of the camera in the width direction of the conveyor belt 14 can be flexibly changed to adapt to the inspection needs of electrode widths and different defect distribution patterns. The longitudinal adjustment of the sliding seat 4, in conjunction with the conveyor belt's conveying movement, enables full-width scanning inspection of the electrode, avoiding blind spots.

[0032] During the inspection process, the LED light strip 8 of the lighting device can switch light sources according to inspection needs. For example, white LED light strip 8 can be turned on for overall observation during preliminary inspection, and infrared or ultraviolet LED light strip 8 can be switched for detailed inspection of specific defects to enhance the contrast of specific defects. The images captured by the camera are transmitted to the image processing system in real time. After algorithm analysis, the system can output the type, location, and size information of defects, and can be linked with the production line control system to automatically mark or reject unqualified electrode sheets.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting surface defects on electrodes, characterized in that: The device includes a support frame (1), a conveying component, a moving component, and a detection component. The conveying component and the moving component are both mounted on the support frame (1). The detection component is mounted on the moving component. The moving component is located above the conveying component. The moving component includes a transverse U-shaped frame (2) and a longitudinal U-shaped frame (3). The transverse U-shaped frame (2) is fixedly connected to the support frame (1). The longitudinal U-shaped frame (3) is perpendicular to the transverse U-shaped frame (2). A sliding seat (4) is slidably provided on the top of the longitudinal U-shaped frame (3). A sliding plate (5) is provided on the bottom of the sliding seat (4). The detection component is located below the sliding plate (5).

2. The electrode surface defect detection device according to claim 1, characterized in that: The bottom side of the sliding plate (5) is provided with a connecting plate (6), and the bottom of the connecting plate (6) is provided with a lighting device. The lighting device includes a square frame (7), and LED light strips (8) are embedded on the four sides of the bottom of the square frame (7).

3. The electrode surface defect detection device according to claim 2, characterized in that: The transverse U-shaped frame (2) is provided with slide rails (9) on both sides, and the longitudinal U-shaped frame (3) is provided with a slide groove (10) on the lower side. The longitudinal U-shaped frame (3) is slidably connected to the transverse U-shaped frame (2), and a locking bolt (11) is provided below the slide groove (10).

4. The electrode surface defect detection device according to claim 3, characterized in that: The conveying assembly includes a conveying frame (12) connected to a support frame (1), a conveying roller (13) on the conveying frame (12), and a conveyor belt (14) on the conveying roller (13).

5. The electrode surface defect detection device according to claim 4, characterized in that: The LED light strip (8) includes infrared LED light strips and ultraviolet LED light strips.

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