A burr detection mechanism of a battery pole piece

Abstract

The application discloses a burr detection mechanism of a battery pole piece, which comprises a support, a linear motion unit and a detection assembly, wherein the linear motion unit is installed on the supporting surface of the support; the detection assembly comprises a mounting frame, a fixing frame, a camera and a light guide piece, the camera is located above the light guide piece, and the optical axis of the camera is obliquely arranged relative to the light emitting surface of the light guide piece, so that the light of the pole piece to be detected is guided to the camera through the light guide piece; the mounting frame is connected with the linear motion unit; the fixing frame comprises a first fixing plate and a second fixing plate; the first fixing plate is connected with the mounting frame; the camera is fixed on the second fixing plate; a locking hole is formed in the side of the second fixing plate close to the first fixing plate; an arc-shaped opening is formed in the first fixing plate; and the opening is matched with the locking hole. Compared with the traditional manual microscopic sampling inspection mode, the burr detection mechanism can avoid the blind area of static detection, is suitable for dynamic detection on a continuous production line, and is favorable for improving the detection efficiency and the detection quality.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode burr detection technology, and in particular to a burr detection mechanism for battery electrodes. Background Technology

[0002] Battery burrs refer to sharp metallic impurities present at the edges of electrode sheets. These impurities can puncture the separator, causing a short circuit inside the battery. Electrode sheets are composed of current collectors, active materials, binders, and conductive agents. Lithium-ion battery electrode sheets typically require burr detection during the manufacturing process. However, existing battery electrode sheet detection devices lack flexibility and accuracy, easily leading to missed or false burr detections, which negatively impacts product yield. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a burr detection mechanism for battery electrodes.

[0004] This application provides a burr detection mechanism for battery electrodes, comprising:

[0005] A support having intersecting first and second directions;

[0006] A linear motion unit is mounted on the support surface of the bracket;

[0007] The detection assembly includes a mounting bracket, a fixing bracket, a camera, and a light guide. The camera is located above the light guide, and the optical axis of the camera is inclined relative to the light-emitting surface of the light guide, so that the light from the electrode to be detected is guided to the camera through the light guide. The mounting bracket is connected to the linear motion unit. The fixing bracket includes a first fixing plate and a second fixing plate. The first fixing plate is connected to the mounting bracket, and the camera is fixed on the second fixing plate. The second fixing plate has a locking hole on the side near the first fixing plate. The first fixing plate has an arc-shaped opening that matches the locking hole, so that the second fixing plate can rotate relative to the first fixing plate through a locking member.

[0008] In one embodiment, the light guide includes a housing and a lens disposed within the housing. The housing has a light inlet and a light outlet on two opposing surfaces in the first direction, and the lens is located between the light inlet and the light outlet to guide the light from the electrode to be tested to the camera.

[0009] In one embodiment, the lens forms an angle with the plane in the first direction, the angle being between 45° and 55°.

[0010] In one embodiment, a connecting frame is also included, the connecting frame comprising a first connecting plate and a second connecting plate, one end of the first connecting plate being connected to the mounting frame and the other end being movably connected to the second connecting plate, and one end of the housing being connected to the second connecting plate.

[0011] In one embodiment, the first connecting plate has a first adjustment hole at one end near the box body, the second connecting plate has a first mounting hole and a second adjustment hole, the first mounting hole is adapted to the first adjustment hole, and the end of the box body used to connect with the second connecting plate has a second mounting hole adapted to the second adjustment hole.

[0012] In one embodiment, the linear motion unit includes a linear motor and a slider, the mounting bracket is connected to the slider, and the linear motor is configured to drive the slider to move along the first direction, so as to drive the mounting bracket to move the light guide and the camera.

[0013] In one embodiment, the bottom of the bracket is provided with a cushion, and the cushion has fixing holes for fixing.

[0014] In one embodiment, the detection assembly further includes a laser sensor for detecting the thickness of the electrode sheet, which is coaxially arranged with the camera.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art:

[0016] The light guide and camera are connected to a mounting bracket, which is then connected to a linear motion unit. During battery electrode inspection, the linear motion unit drives the mounting bracket to move along a first direction, thereby causing the camera and light guide to scan the surface of the battery electrodes line by line. Compared to traditional manual sampling using a microscope, this avoids blind spots in static inspection and is suitable for dynamic inspection on continuous production lines, improving inspection efficiency and quality. Furthermore, the second fixing plate is movably connected to the first fixing plate, allowing the camera to adjust its angle relative to the mounting bracket (e.g., tilt or rotate). This allows users to flexibly adjust the camera's shooting angle according to actual inspection needs (e.g., electrode thickness, light reflection angle), ensuring accurate and clear image acquisition and avoiding blind spots or image distortion caused by fixed installation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a burr detection mechanism for battery electrode sheets according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the light guide component in a burr detection mechanism for battery electrodes according to an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a burr detection mechanism for battery electrodes according to another embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the detection component in a burr detection mechanism for battery electrodes according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the connecting frame in a burr detection mechanism for battery electrodes according to an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the fixing frame in a burr detection mechanism for battery electrodes according to an embodiment of this utility model.

[0023] Icon labels:

[0024] 10. Bracket; 20. Linear motion unit; 21. Linear motor; 22. Slider; 30. Detection component; 31. Mounting bracket; 32. Camera; 33. Light guide; 331. Box body; 331a. Light outlet; 331b. Light inlet; 331c. Second mounting hole; 332. Lens; 34. Connecting bracket; 341. First connecting plate; 341a. First adjustment hole; 342. Second connecting plate; 342a. First mounting hole; 342b. Second adjustment hole; 35. Fixing bracket; 351. First fixing plate; 351a. Opening; 352. Second fixing plate; 352a. Locking hole; 40. Cushion; 40a. Fixing hole. Detailed Implementation

[0025] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0026] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0028] like Figures 1 to 6 As shown in the figure, a burr detection mechanism for a battery electrode sheet according to an embodiment of the present invention includes a support 10, a linear motion unit 20, and a detection component 30. The support 10 has intersecting first and second directions. Here, "first direction" and "second direction" are defined for ease of describing the positional relationship between components. Specifically, with the support 10 as a reference, the first direction refers to the length direction of the support 10 (refer to...). Figure 1 The first direction refers to the X direction, and the second direction refers to the height direction of the bracket 10 (refer to the X direction). Figure 1 Y direction in ).

[0029] Specifically, the linear motion unit 20 is mounted on the support surface of the bracket 10; the detection component 30 includes a mounting frame 31, a fixing frame 35, a camera 32, and a light guide 33. The camera 32 is located above the light guide 33, and the optical axis of the camera 32 is inclined relative to the light-emitting surface of the light guide 33 so that the light from the electrode to be detected is guided to the camera 32 through the light guide 33. The mounting frame 31 is connected to the linear motion unit 20. The fixing frame 35 includes a first fixing plate 351 and a second fixing plate 352. The first fixing plate 351 is connected to the mounting frame 31. The camera 32 is fixed on the second fixing plate 352. A locking hole 352a is provided on the side of the second fixing plate 352 near the first fixing plate 351. An arc-shaped opening 351a is provided on the first fixing plate 351. The opening 351a is adapted to the locking hole 352a so that the second fixing plate 352 can rotate relative to the first fixing plate 351 through the locking component. Preferably, the angle range of the arc-shaped opening is 0° to 30°. Adjusting within this angle range can significantly improve the burr detection and recognition rate and the clarity of the captured image.

[0030] The burr detection device for battery electrodes in this embodiment connects the light guide 33 and the camera 32 to the mounting frame 31, and connects the mounting frame 31 to the linear motion unit 20. This allows the linear motion unit 20 to drive the mounting frame 31 to move along a first direction during battery electrode inspection, thereby causing the camera 32 and the light guide 33 to scan the surface of the battery electrode line by line. Compared to the traditional method of manual sampling using a microscope, this avoids blind spots in static inspection and is suitable for dynamic inspection on continuous production lines, improving inspection efficiency and quality. Furthermore, the second fixing plate 352 is movably connected to the first fixing plate 351, allowing the camera 32 to adjust its angle relative to the mounting frame 31 (e.g., tilt or rotate). This allows users to flexibly adjust the shooting angle of the camera 32 according to actual inspection needs (e.g., electrode thickness, light reflection angle), ensuring the accuracy and clarity of image acquisition and avoiding blind spots or image distortion caused by fixed installation.

[0031] For example, the light guide 33 is used to guide the light from the battery electrode to the camera 32, thus acting as a light guide and enabling multi-angle illumination and imaging of the electrode surface. Furthermore, burrs, as tiny protrusions on the edge or surface of the battery electrode, have different light characteristics (such as reflection and shadow) compared to flat areas. In this embodiment, to enable more comprehensive detection of the battery electrode, the optical axis of the camera 32 is tilted relative to the light-emitting surface of the light guide 33. This enhances the contrast between the burrs and the background, allowing the camera 32 to capture clearer edge contours and improving detection quality.

[0032] For example, the linear motion unit 20 can be a power component in the prior art that can drive the mounting bracket 31 to move in a predetermined direction, or it can adopt the specific structure of the following embodiment, without limitation. In addition, it should be noted that the stroke of the linear motion unit 20 can be adjusted according to the width of the battery electrode to be suitable for detecting battery electrodes of different sizes.

[0033] In practical applications, bolts are used as locking components. When it is necessary to adjust the pitch angle of the camera 32 to match the reflective angle of the electrode surface, after loosening the bolts, the second fixing plate 352 can rotate around the locking component within the range of the arc-shaped opening 351a. The angle (such as adjusting from 20° to 25°) is determined by observing the scale line (preferably, a precise angle scale line is also provided around the arc-shaped opening 351a to accurately display the adjustment angle). After adjustment, the bolts are tightened to lock the position, avoiding angle deviation caused by manual estimation.

[0034] In one embodiment, the light guide 33 includes a housing 331 and a lens 332 disposed within the housing 331. The housing 331 has a light inlet 331b and a light outlet 331a on two opposing surfaces in a first direction. The lens 332 is located between the light inlet 331b and the light outlet 331a to guide the light from the electrode to be tested towards the camera 32. That is, by placing the lens 332 within the housing 331 and between the light inlet 331b and the light outlet 331a, when the housing 331 moves above the battery electrode, the light reflected or scattered by the electrode enters the housing 331 through the light inlet 331b. Then, the lens 332 changes the propagation mode of the light through reflection, refraction, or transmission, ensuring that the light exits from the light outlet 331a to the camera 32 along a preset path, thereby improving the stability of the image. Preferably, the lens 332 is a semi-transparent, semi-reflective mirror.

[0035] Furthermore, by encapsulating the lens 332 within the housing 331, dust, moisture, and other contaminants can be effectively prevented from directly adhering to the surface of the lens 332, thus avoiding light path obstruction or scattering. Simultaneously, when the lens 332 needs cleaning or replacement, the housing 331 can be disassembled separately, and a new light guide 33 can be used without adjusting the entire detection assembly 30.

[0036] In one embodiment, the lens 332 forms an angle with the plane in the first direction, with the angle between 45° and 55°. That is, setting the angle within this range balances the field of view and light reflection efficiency, ensuring that burrs on the electrode surface (especially at the edges) are presented as clear, distortion-free images in the field of view of the camera 32, thus improving detection accuracy. If the angle is too small (e.g., less than 45°), the light reflection path may be too gentle, resulting in a limited detection field of view and difficulty in covering the edge area of ​​the electrode; if the angle is too large (e.g., greater than 55°), the light reflection angle is steep, which may introduce specular reflection interference (such as strong glare), affecting image quality.

[0037] In one embodiment, a connecting frame 34 is also included. The connecting frame 34 includes a first connecting plate 341 and a second connecting plate 342. One end of the first connecting plate 341 is connected to the mounting frame 31, and the other end is movably connected to the second connecting plate 342. One end of the housing 331 is connected to the second connecting plate 342. That is, when testing battery electrodes of different thicknesses, widths, or materials, the distance or relative angle between the light guide 33 and the electrode surface can be changed by adjusting the movable joint of the connecting frame 34, ensuring that the light incident and reflection paths always adapt to the electrode state. This adjustability avoids detection blind spots or light obstruction caused by changes in electrode specifications, improving the versatility and compatibility of the testing mechanism.

[0038] In one embodiment, the first connecting plate 341 has a first adjustment hole 341a at one end near the box body 331, and the second connecting plate 342 has a first mounting hole 342a and a second adjustment hole 342b. The first mounting hole 342a is adapted to the first adjustment hole 341a, and the end of the box body 331 used to connect with the second connecting plate 342 has a second mounting hole 331c adapted to the second adjustment hole 342b.

[0039] For example, by providing a first adjustment hole 341a at one end of the first connecting plate 341 near the housing 331, and providing a first mounting hole 342a on the second connecting plate 342, the adaptive design of the first mounting hole 342a and the first adjustment hole 341a allows the second connecting plate 342 to slide or rotate relative to the first connecting plate 341 within the adjustment hole range by loosening the locking element (such as a bolt). For example, when it is necessary to adjust the horizontal position (along the first direction) or vertical height (along the second direction) of the light guide 33, the position of the housing 331 can be slightly changed through the elongated or arc-shaped structure of the adjustment hole, ensuring that the distance between the light inlet 331b and the electrode surface is precisely matched, avoiding insufficient light reflection or imaging distortion caused by installation errors.

[0040] In one embodiment, the linear motion unit 20 includes a linear motor 21 and a slider 22. A mounting frame 31 is connected to the slider 22. The linear motor 21 is configured to drive the slider 22 to move along a first direction, thereby driving the mounting frame 31 to move the light guide 33 and the camera 32. In other words, when inspecting battery electrodes, the linear motor 21 drives the slider 22 to move along the first direction. Since the slider 22 is connected to the mounting frame 31, and the light guide 33 and camera 32 are connected to the mounting frame 31, the camera 32 and light guide 33 can be driven to scan the surface of the battery electrodes line by line, avoiding blind spots in static inspection and making it suitable for dynamic inspection on continuous production lines.

[0041] In one embodiment, the bottom of the bracket 10 is provided with a cushion 40, and the cushion 40 has a fixing hole 40a for fixing. In this way, fasteners (such as bolts and wing nuts) can be passed through the fixing hole 40a to fix the bracket 10 to the placement surface, so as to avoid shaking during use and affecting the accuracy of the test results.

[0042] In one embodiment, the detection component further includes a laser sensor for detecting the thickness of the battery electrode sheet, which is coaxially arranged with the camera; specifically, a laser ranging probe (or an infrared thermal imager) is mounted on the mounting bracket 31 to achieve integrated detection of burrs, thickness, and coating defects, thus achieving the effect of multi-functional simultaneous detection.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A burr detection mechanism for battery electrodes, characterized in that, include: A support having intersecting first and second directions; A linear motion unit is mounted on the support surface of the bracket; The detection assembly includes a mounting bracket, a fixing bracket, a camera, and a light guide. The camera is located above the light guide, and the optical axis of the camera is inclined relative to the light-emitting surface of the light guide, so that the light from the electrode to be detected is guided to the camera through the light guide. The mounting bracket is connected to the linear motion unit. The fixing bracket includes a first fixing plate and a second fixing plate. The first fixing plate is connected to the mounting bracket, and the camera is fixed on the second fixing plate. The second fixing plate has a locking hole on the side near the first fixing plate. The first fixing plate has an arc-shaped opening that matches the locking hole, so that the second fixing plate can rotate relative to the first fixing plate through a locking member.

2. The burr detection mechanism for battery electrodes according to claim 1, characterized in that, The light guide includes a housing and a lens disposed within the housing. The housing has a light inlet and a light outlet on two opposing surfaces in the first direction, and the lens is located between the light inlet and the light outlet to guide the light from the electrode to be tested to the camera.

3. The burr detection mechanism for battery electrodes according to claim 2, characterized in that, The lens forms an angle with the plane in the first direction, and the angle is between 45° and 55°.

4. The burr detection mechanism for battery electrodes according to claim 2, characterized in that, It also includes a connecting frame, which includes a first connecting plate and a second connecting plate. One end of the first connecting plate is connected to the mounting frame, and the other end is movably connected to the second connecting plate. One end of the box body is connected to the second connecting plate.

5. The burr detection mechanism for battery electrodes according to claim 4, characterized in that, The first connecting plate has a first adjustment hole at one end near the box body, and the second connecting plate has a first mounting hole and a second adjustment hole. The first mounting hole is adapted to the first adjustment hole, and the end of the box body used to connect with the second connecting plate has a second mounting hole adapted to the second adjustment hole.

6. The burr detection mechanism for battery electrodes according to claim 1, characterized in that, The linear motion unit includes a linear motor and a slider. The mounting bracket is connected to the slider. The linear motor is configured to drive the slider to move along the first direction, thereby driving the mounting bracket to move the light guide and the camera.

7. The burr detection mechanism for battery electrodes according to claim 1, characterized in that, The bottom of the bracket is provided with a cushion, and the cushion has fixing holes for fixing.

8. The burr detection mechanism for battery electrodes according to claim 1, characterized in that, The detection component also includes a laser sensor for detecting the thickness of the electrode sheet, which is coaxially arranged with the camera.

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