Battery cell appearance detection device

Abstract

The utility model discloses a battery electric core appearance detection device, including base, be equipped with support, rotating base, rotary clamping device and detection camera on the base, be equipped with crossbeam on the support, rotating base is rotationally arranged on the crossbeam, the middle of rotating base is equipped with the cap slot, rotary clamping device includes drive support and driven support, vertical rotation is equipped with the drive roll on the drive support, the both sides vertical rotation of driven support are equipped with driven roll, the connecting line of drive roll and two driven rolls forms the triangle structure and is arranged in the periphery of rotating base, the bottom of drive support is equipped with the drive motor, the output of drive motor is connected with drive roll, the lens of detection camera is opposite rotating base and sets up. This scheme can carry out full periphery surface imaging to the surface of electric core, effectively avoids the dead angle problem existing in fixed shooting.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell testing technology, specifically relating to a battery cell appearance testing device. Background Technology

[0002] Currently, battery cells typically undergo visual inspection after production to determine if their surfaces have defects such as scratches, dents, bulges, or contamination, thus ensuring product appearance quality and consistency in subsequent assembly. Existing visual inspection equipment mostly uses a fixed camera to capture images of a single side of the cell after it is transported to the inspection position.

[0003] However, since battery cells are generally cylindrical or square in shape, their outer surface has multiple sides or continuous curved surfaces. A single-angle shooting method is difficult to achieve a complete inspection of the entire outer surface, often resulting in blind spots. For example, for cylindrical battery cells, a fixed camera can only inspect the area facing the camera, while the area behind it cannot be photographed, making it easy to miss appearance defects such as scratches, poor printing, or local deformation.

[0004] To address these issues, some devices have attempted to achieve multi-faceted detection by increasing the number of cameras or setting up multi-angle shooting mechanisms. However, such solutions are complex in structure, occupy a large amount of space, and are costly. Furthermore, the stitching and calibration between images from multiple cameras are difficult, resulting in limited detection accuracy and stability. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a battery cell appearance inspection device, comprising a base, a support, a rotating base, a rotating clamping device, and an inspection camera mounted on the base. The support has a crossbeam, and the rotating base is rotatably mounted on the crossbeam. The rotating base has a cap groove in its center. The rotating clamping device includes a driving support and a driven support. A driving roller is vertically rotatably mounted on the driving support, and driven rollers are vertically rotatably mounted on both sides of the driven support. The line connecting the driving roller and the two driven rollers forms a triangular structure surrounding the rotating base. A driving motor is mounted at the bottom of the driving support, and the output end of the driving motor is connected to the driving roller. The inspection camera is positioned on one side of the rotating base, with its lens facing the rotating base.

[0006] Preferably, the base is provided with a support plate, the support plate is provided with a slide rail, the bottom of the drive bracket is provided with a slider, the slider is slidably disposed on the slide rail, the support plate is also provided with a telescopic motor, the output end of the telescopic motor is connected to the drive bracket, and the driven bracket is fixedly disposed on the support plate.

[0007] Preferably, a magnetic ring is provided on the inner wall of the pole cap groove.

[0008] Preferably, the crossbeam is provided with fitting baffles on both sides of the rotating base, and the side of the baffle facing the rotating base has an arc-shaped structure.

[0009] Preferably, both the drive roller and the driven roller have an anti-slip rubber layer on their outer surfaces.

[0010] The advantages of this utility model are: 1. This solution utilizes a three-point surrounding clamping structure of the driving and driven rollers, enabling the battery cell to achieve stable and uniform rotation on a rotating base. The inspection camera lens is positioned directly facing the battery cell, allowing for continuous image acquisition during rotation and achieving 360° full-coverage inspection of the outer surface. This solution significantly reduces missed detections and false positives, while automatically identifying defects such as scratches, dents, and printing misalignments through computer vision algorithms, greatly improving inspection accuracy and work efficiency.

[0011] 2. This solution employs a combined structure of a drive bracket and a driven bracket. The drive bracket has a slider at its bottom that moves along a slide rail, and automatic clamping and releasing are achieved via a telescopic motor. This design can automatically adjust the clamping distance according to the cell diameter, making it suitable for various product specifications and improving the equipment's versatility.

[0012] 3. The drive roller and driven roller of this solution are covered with an anti-slip rubber layer, which can not only effectively increase friction and prevent rotational slippage, but also prevent the metal roller from directly contacting the surface of the battery cell, causing scratches or indentations, and ensuring the product's appearance is intact. 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 crossbeam of this utility model.

[0015] Figure 3 This is a cross-sectional structural diagram of the rotating base of this utility model.

[0016] Figure 4 This is an exploded structural diagram of the rotary clamping device of this utility model.

[0017] Figure 5 This is an assembly structure diagram of the rotary clamping device of this utility model.

[0018] In the diagram: 1. Base, 2. Bracket, 3. Rotating base, 4. Detection camera, 5. Crossbeam, 6. Pole cap groove, 7. Drive bracket, 8. Driven bracket, 9. Drive roller, 10. Driven roller, 11. Drive motor, 12. Support plate, 13. Slide rail, 14. Slider, 15. Telescopic motor, 16. Magnetic ring, 17. Baffle, 18. Battery cell workpiece. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Example 1, such as Figure 1-2 As shown, a battery cell appearance inspection device includes a base 1, a bracket 2, a rotating base 3, a rotating clamping device, and an inspection camera 4. The base 1 serves as the load-bearing structure for the entire device, providing a stable mounting platform and mechanical support. The bracket 2 is fixedly mounted on top of the base 1, and a horizontal beam 5 is arranged on the upper part of the bracket 2. The beam 5 is used to mount the rotating base 3 and its rotating support components, enabling the battery cell to rotate stably during inspection. The bracket 2 and the beam 5 are connected by bolts or welding to ensure the rigidity and stability of the structure and prevent vibrations during rotational inspection from affecting the inspection accuracy.

[0023] Combination Figure 3The rotating base 3 is located below the crossbeam 5 and is rotatably connected to the crossbeam 5 via a bearing assembly, enabling it to rotate smoothly around its central axis. A cap groove 6 is located in the center of the rotating base 3 to accommodate and position the cap area at the top of the battery cell. The depth and shape of this cap groove 6 can be designed to match the structure of different battery cell models to ensure accurate positioning and stability of the battery cell during placement. To further enhance the positioning effect, a magnetic ring 16 is provided on the inner wall of the cap groove 6. The magnetic force generated by the magnetic ring 16 provides a certain attraction force to the battery cell shell, thereby preventing the battery cell from shaking or shifting during rotation and improving the imaging stability and repeatability accuracy during the detection process.

[0024] Combination Figure 4-5 A rotating clamping device is located around the rotating base 3 to limit and clamp the sidewalls of the battery cell during rotational testing. This clamping device consists of a drive bracket 7 and a driven bracket 8. A drive roller 9 is vertically rotatably mounted on the drive bracket 7, and two driven rollers 10 are vertically rotatably mounted on both sides of the driven bracket 8. The three rollers are arranged in a triangular pattern, forming a surrounding structure to surround and clamp the outer surface of the battery cell. This three-point clamping method ensures uniform force on the battery cell during rotation, preventing deviation or shaking and improving the stability and accuracy of the testing.

[0025] The drive roller 9 is powered by the drive motor 11. The drive motor 11 is fixedly mounted below the drive bracket 7, and its output shaft is connected to the rotating shaft of the drive roller 9 via a coupling. When the drive motor 11 starts, the drive roller 9 rotates under the drive of the motor and comes into frictional contact with the side wall of the clamped battery cell, thereby driving the battery cell to rotate at a uniform speed. To prevent slippage between the drive roller 9 and the surface of the battery cell or damage to the battery cell casing, the outer surfaces of both the drive roller 9 and the driven roller 10 are covered with an anti-slip rubber layer. This rubber layer has a certain elasticity and coefficient of friction, which can enhance friction and improve rotational drive efficiency during clamping, and also provide flexible protection for the surface of the battery cell, preventing scratches or indentations caused by direct metal contact.

[0026] A support plate 12 is provided below the clamping mechanism and is fixed to the base 1. The support plate 12 provides mounting and guiding support for the drive bracket 7 and the driven bracket 8. A slide rail 13 is provided on the upper surface of the support plate 12 in the transverse direction, and a slider 14 is provided at the bottom of the drive bracket 7. The slider 14 can slide along the slide rail 13. The cooperation between the slide rail 13 and the slider 14 ensures that the drive bracket 7 can move parallel within a certain range to accommodate battery cells of different diameters. A telescopic motor 15 is also installed on the support plate 12, and the output end of the telescopic motor 15 is connected to the drive bracket 7. When the telescopic motor 15 is started, the drive bracket 7 can move inward or outward on the slide rail 13, thereby driving the drive roller 9 to approach or move away from the battery cell workpiece 18, achieving automatic clamping and releasing functions. When the battery cell workpiece 18 is placed in or removed, the telescopic motor 15 retracts, causing the drive bracket 7 to retract, creating sufficient loading and unloading space. Before the start of testing, the telescopic motor 15 extends, pushing the drive roller 9 towards the battery cell until the battery cell is clamped at three points. This automatic clamping method makes the cell clamping process more convenient and faster, reduces manual intervention, and improves testing efficiency.

[0027] To further improve detection accuracy, arc-shaped baffles 17 are provided on both sides of the rotating base 3 on the crossbeam 5. The arc surface of the baffles 17 faces the rotating base 3, and its shape matches the outer circular surface of the battery cell, serving as an auxiliary limit when the battery cell rotates. The arc-shaped baffles 17 not only prevent the battery cell from tilting or shaking when rotating at high speed, but also provide protection to prevent the battery cell from accidentally falling off. The baffles 17 can be made of transparent engineering plastic or a metal frame structure so that the detection camera 4 can capture image signals of the battery cell surface from different angles.

[0028] The inspection camera 4 is mounted on the bracket 2, with its lens facing the rotating base 3 and its shooting direction perpendicular to the side wall of the battery cell. The camera can be an industrial CCD or a high-resolution CMOS camera, connected to the control host via a computer vision system. During inspection, as the battery cell is clamped and rotated by the clamping mechanism, the camera continuously acquires images of the battery cell surface, achieving 360-degree full-coverage imaging of the outer surface of the battery cell through high-speed shooting. The system uses image processing algorithms to analyze the acquired images, automatically identifying surface defects such as scratches, bubbles, printing misalignment, and foreign matter adhesion. By comparing with standard template images, automatic judgment and defect marking can be achieved, significantly improving inspection efficiency and consistency.

[0029] During operation, the operator first inserts the electrode cap portion of the battery cell workpiece 18 to be inspected into the electrode cap groove 6 of the rotating base 3. Due to the adsorption effect of the magnetic ring 16, the battery cell workpiece 18 can automatically center and be stably fixed in the groove. Subsequently, the telescopic motor 15 is started by the control system, driving the support 7 to move inward along the slide rail 13. The drive roller 9 and the two driven rollers 10 simultaneously contact the surface of the battery cell and apply a moderate clamping force. Then, the drive motor 11 starts, and the drive roller 9 rotates, causing the battery cell to rotate at a uniform speed. The inspection camera 4 synchronously acquires images during the rotation of the battery cell, capturing images of the battery cell surface at a preset frame rate. During one revolution of the battery cell, its entire outer circumference surface is completely imaged, thus achieving inspection without blind spots. When the inspection is completed, the drive motor 11 stops rotating, the telescopic motor 15 drives the drive support 7 to retract, releasing the battery cell, and the operator can then replace it with the next product to be inspected, achieving continuous operation.

[0030] 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 battery cell appearance inspection device, characterized in that: The device includes a base (1), a bracket (2), a rotating base (3), a rotating clamping device, and a detection camera (4) on the base (1). A crossbeam (5) is provided on the bracket (2). The rotating base (3) is rotatably mounted on the crossbeam (5). An pole cap groove (6) is provided in the middle of the rotating base (3). The rotating clamping device includes a drive bracket (7) and a driven bracket (8). A drive roller (9) is vertically rotatably mounted on the drive bracket (7). Driven rollers (10) are vertically rotatably mounted on both sides of the driven bracket (8). The line connecting the drive roller (9) and the two driven rollers (10) forms a triangular structure and is arranged around the periphery of the rotating base (3). A drive motor (11) is provided at the bottom of the drive bracket (7). The output end of the drive motor (11) is connected to the drive roller (9). The detection camera (4) is located on one side of the rotating base (3) with its lens facing the rotating base (3).

2. The battery cell appearance inspection device according to claim 1, characterized in that: The base (1) is provided with a support plate (12), the support plate (12) is provided with a slide rail (13), the bottom of the drive bracket (7) is provided with a slider (14), the slider (14) is slidably disposed on the slide rail (13), the support plate (12) is also provided with a telescopic motor (15), the output end of the telescopic motor (15) is connected to the drive bracket (7), and the driven bracket (8) is fixedly disposed on the support plate (12).

3. The battery cell appearance inspection device according to claim 2, characterized in that: A magnetic ring (16) is provided on the inner wall of the pole cap groove (6).

4. The battery cell appearance inspection device according to claim 3, characterized in that: The crossbeam (5) is provided with baffles (17) on both sides of the rotating base (3), and the side of the baffle (17) facing the rotating base (3) is an arc-shaped structure.

5. The battery cell appearance inspection device according to claim 4, characterized in that: The outer surfaces of both the drive roller (9) and the driven roller (10) are provided with anti-slip rubber layers.

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