Burr detection apparatus and stacking device

Abstract

A burr detection apparatus (10) and a stacking device, wherein the burr detection apparatus (10) comprises a conveying mechanism (100), a pre-positioning mechanism (200), an electrode sheet grabbing mechanism (300), and a visual detection mechanism (400). An electrode sheet (20) carried by the conveying mechanism (100) is conveyed downstream and then transferred to a pre-positioning platform (210) by the electrode sheet grabbing mechanism (300) prior to a stacking operation. The visual detection mechanism (400) can then acquire image information of cut edges of the electrode sheet (20), so as to determine whether burrs exceed a permissible limit. Electrode sheets (20) with unacceptable detected burrs are removed, while acceptable electrode sheets (20) are moved to a stacking table by a stacking manipulator for stacking. Because detection cameras (410) on two sides are able to acquire image information of two cut edges of an electrode sheet (20) at the same time, and each detection camera (410) is driven by a driving assembly (420) to move along an edge of the pre-positioning platform (210), the detection speed for burrs on a single electrode sheet (20) is relatively fast. Once cut, the electrode sheet (20) is successively subjected to operations including conveying, burr detection, and stacking, with each process being seamlessly linked. Therefore, the burr detection apparatus (10) and the stacking device are able to effectively improve production efficiency.

Description

Burr detection device and lamination equipment Technical Field

[0001] The present application relates to the technical field of lithium battery equipment, and in particular to a burr detection device and a lamination device. Background Art

[0002] During the lamination process, burrs may form on the edges of the electrode sheets during cutting. These burrs can pierce the separator, causing contact between the positive and negative electrodes and a short circuit. To improve the safety of lithium-ion batteries, electrode sheets must be inspected for burrs, and any burrs exceeding the standard must be promptly removed. However, this common offline inspection method, typically using a visual microscope, is cumbersome and significantly impacts production efficiency.

[0003] Application Contents

[0004] Based on this, it is necessary to provide a burr detection device and lamination equipment that can effectively improve production efficiency to address the above problems.

[0005] A burr detection device, comprising:

[0006] A conveying mechanism capable of carrying and conveying the electrode;

[0007] A pre-positioning mechanism, comprising a pre-positioning platform for carrying the pole piece;

[0008] a film taking mechanism capable of transferring the electrode from the conveying mechanism to the pre-positioning platform; and

[0009] Visual inspection mechanisms are provided on both sides of the pre-positioning platform, each of the visual inspection mechanisms includes a detection camera and a drive assembly, the detection camera is installed at the driving end of the drive assembly and can be driven by the drive assembly to move along the edge of the pre-positioning platform;

[0010] The detection camera can obtain image information of the electrode carried on the pre-positioning platform for burr detection.

[0011] In one embodiment, the conveying mechanism is configured as a vacuum belt.

[0012] In one embodiment, the surface of the pre-positioning platform can form a negative pressure to absorb the carried electrode.

[0013] In one embodiment, the pre-positioning mechanism further includes a correction component and a position detection component. The position detection component can obtain the position information of the pole piece, and the correction component can drive the pre-positioning platform to translate and rotate according to the position information to correct the pole piece carried on the pre-positioning platform.

[0014] In one embodiment, the film-picking mechanism can make the electrode stay above the pre-positioning platform during the process of transferring the electrode, the position detection component can obtain the position information of the electrode staying above the pre-positioning platform, and the correction component can drive the pre-positioning platform from the origin position to the compensation position according to the position information to receive the electrode staying above the pre-positioning platform, and drive the pre-positioning platform from the compensation position back to the origin position to correct the electrode.

[0015] In one embodiment, the film picking mechanism includes a lifting component, a rotating component and a suction cup, the suction cup can absorb the pole piece, the lifting component can drive the suction cup to rise and fall in a direction perpendicular to the bearing surface of the pre-positioning platform, and the rotating component can drive the suction cup to rotate back and forth between the conveying mechanism and the pre-positioning platform along an axis perpendicular to the bearing surface of the pre-positioning platform.

[0016] In one embodiment, the rotating assembly is installed at the moving end of the lifting assembly, and the suction cup is arranged at the rotating end of the rotating assembly through a connecting rod.

[0017] In one embodiment, each of the visual inspection mechanisms further includes a light source, the light emitted by the light source can illuminate the pole piece carried on the pre-positioning platform, and the reflected light formed by the pole piece can be received by the inspection camera.

[0018] In one embodiment, each of the visual inspection mechanisms further includes a prism, which is arranged opposite to the edge of the pre-positioning platform. The optical axis of the inspection camera extends in a direction perpendicular to the supporting surface of the pre-positioning platform, and the reflected light emitted by the pole piece can be refracted by the prism and then received by the inspection camera.

[0019] In one embodiment, the prism is capable of refracting reflected light from the cut edge of the pole piece by 90 degrees.

[0020] In one embodiment, the position of the detection camera is adjustable in a direction perpendicular to the supporting surface of the pre-positioning platform.

[0021] In one embodiment, each of the visual inspection mechanisms includes a plurality of the inspection cameras, which are spaced apart along the edge of the pre-positioning platform and can each move along the edge of the pre-positioning platform under the drive of the driving assembly.

[0022] A lamination device comprises a lamination table, a lamination robot and a burr detection device as described in any one of the above preferred embodiments; the lamination robot is capable of placing the pole piece located on the pre-positioning platform on the lamination table to perform lamination operations.

[0023] In the above-mentioned burr detection device and lamination equipment, the electrode obtained by slicing is carried by the conveying mechanism and conveyed downstream, and is transferred to the pre-positioning platform by the film-taking mechanism before the lamination operation. Then, the visual inspection mechanism can obtain the image information of the electrode to determine whether the burrs exceed the standard. The electrode pieces that fail the burr detection will be rejected, and the qualified electrode pieces will be transported to the lamination table by the lamination robot for lamination. Since the detection cameras on both sides can simultaneously obtain the image information of the two cut edges of the electrode piece, and each detection camera can move along the edge of the pre-positioning platform under the drive of the driving component, the burr detection speed of a single electrode piece is relatively fast. After slicing, the electrode piece can realize the operations such as conveying, burr detection and lamination in sequence, and each process is connected and coherent. Therefore, the above-mentioned burr detection device and lamination equipment can effectively improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] FIG1 is a schematic structural diagram of a burr detection device in a preferred embodiment of the present application;

[0026] FIG2 is a top view of the burr detection device shown in FIG1 ;

[0027] FIG3 is a schematic diagram of the electrode piece being transferred to the pre-positioning platform by the electrode removal mechanism in the burr detection device shown in FIG1 ;

[0028] FIG4 is a schematic structural diagram of a visual detection mechanism in the burr detection device shown in FIG1 ;

[0029] FIG5 is a top view of the detection mechanism shown in FIG4 . DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] 1 , the present application provides a burr detection device 10 and a lamination device, wherein the lamination device includes the burr detection device 10 , a lamination table, and a lamination robot.

[0037] The burr detection device 10 can perform burr detection on the electrode sheets required for lamination. Electrode sheets that fail the burr detection will be rejected. The lamination robot can move the electrode sheets that pass the burr detection to the lamination table for stacking, thereby obtaining a battery cell. As can be seen, each electrode sheet 20 laminated on the lamination table is subjected to burr detection, which prevents the leakage of electrode sheets 20 with excessive burrs, thereby effectively preventing the flow of electrode sheets 20 with excessive burrs.

[0038] Please also refer to FIG. 2 . The burr detection device 10 in the preferred embodiment of the present application includes a conveying mechanism 100 , a pre-positioning mechanism 200 , a sheet taking mechanism 300 and a visual inspection mechanism 400 .

[0039] The conveyor mechanism 100 is capable of carrying and conveying the electrode sheets 20. The sliced ​​electrode sheets 20 are placed on the conveyor mechanism 100 and conveyed downstream by the conveyor mechanism 100. Specifically, in this embodiment, the conveyor mechanism 100 is configured as a vacuum belt. In this way, the electrode sheets 20 can be adsorbed on the surface of the vacuum belt during the conveying process, thereby preventing the electrode sheets 20 from falling off.

[0040] The pre-positioning mechanism 200 includes a pre-positioning platform 210 for carrying the electrode. The electrode removal mechanism 300 is capable of transferring the electrode from the conveying mechanism 100 to the pre-positioning platform 210, so that the electrode 20 can be inspected for burrs on the pre-positioning platform 210. The pre-positioning platform 210 is generally elongated and extends along the conveying direction of the conveying mechanism 100. The pre-positioning platform 210 is disposed on one side of the conveying mechanism 100 to facilitate the transfer of the electrode from the conveying mechanism 100 to the pre-positioning platform 210 by the electrode removal mechanism 300.

[0041] Specifically, in this embodiment, the film removal mechanism 300 includes a lifting assembly (not labeled), a rotating assembly (not labeled), and a suction cup 310. The suction cup 310 can pick up the electrode 20, the lifting assembly can drive the suction cup 310 to rise and fall in a direction perpendicular to the bearing surface of the pre-positioning platform 210, and the rotating assembly can drive the suction cup 310 to rotate back and forth between the conveying mechanism 100 and the pre-positioning platform 210 along an axis perpendicular to the bearing surface of the pre-positioning platform 210.

[0042] The lifting assembly can be driven by a cylinder, and the rotating assembly can be driven by a motor. The rotating assembly can be installed on the moving end of the lifting assembly, and the suction cup 310 can be set on the rotating end of the rotating assembly through a connecting rod (not marked in the figure). The length of the connecting rod is the rotation radius of the suction cup 310. When transferring the pole piece 20, the rotating assembly first drives the suction cup 310 to rotate above the conveying mechanism 100, and then the lifting assembly drives the suction cup 310 to descend until it contacts the pole piece 20 on the conveying mechanism 100 to complete the suction; then, the lifting assembly drives the suction cup 310 to rise, and the rotating assembly drives the suction cup 310 to rotate above the pre-positioning platform 210. The lifting assembly drives the suction cup 310 to descend again until the pole piece 20 contacts or is about to contact the pre-positioning platform 210, and the suction cup 310 releases the pole piece 20.

[0043] Driven by the lifting assembly and the rotating assembly, the suction cup 310 can move within two degrees of freedom with high movement accuracy and efficiency.

[0044] Specifically, in this embodiment, the surface of the pre-positioning platform 210 can generate a negative pressure to attract the electrode 20 it carries. The surface of the pre-positioning platform 210 can be formed with multiple adsorption holes that interact with a negative pressure cavity (not shown). By evacuating the negative pressure cavity, a negative pressure is generated on the surface of the pre-positioning platform 210. Because the electrode 20 is fixed by adsorption on the pre-positioning platform 210, it can prevent its position from shifting due to factors such as airflow and vibration, thereby maintaining a stable position for burr detection.

[0045] At least two visual inspection mechanisms 400 are provided, one on each side of the pre-positioning platform 210. The pole piece 20 on the pre-positioning platform 210 extends in the same direction as the pre-positioning platform 210, and the two cut edges of the pole piece 20 are located on either side of the width direction of the pole piece 20. Specifically, the visual inspection mechanisms 400 are located on both sides of the width direction of the pre-positioning platform 210. Therefore, the visual inspection mechanisms 400 on both sides can respectively obtain image information of the two cut edges of the pole piece 20 on the pre-positioning platform 210 for burr detection.

[0046] Referring also to Figure 4 , each visual inspection mechanism 400 includes an inspection camera 410 and a drive assembly 420 . The inspection camera 410 is mounted on the drive end of the drive assembly 420 and is driven by the drive assembly 420 to move along the edge of the pre-positioning platform 210 . The inspection camera 410 is capable of capturing images of the pole piece 20 supporting the pre-positioning platform 210 . By analyzing this image information, it is possible to determine whether the burrs on the cut edge of the pole piece 20 exceed the specified limit.

[0047] For pole pieces 20 that pass the burr inspection, they can be directly transported from the pre-positioning platform 210 to the lamination table for lamination by the lamination robot. Moreover, because the inspection cameras 410 on both sides can simultaneously obtain image information of the two cut edges of the pole piece 20, and each inspection camera 410 can be driven by the drive assembly 420 to move along the edge of the pre-positioning platform 210, the burr inspection speed of a single pole piece 20 is relatively fast. After slicing, the pole piece 20 can be transported, inspected for burrs, and laminated in sequence, and each process is connected and coherent, thereby effectively improving production efficiency.

[0048] Please refer to Figure 5. In this embodiment, each visual inspection mechanism 400 includes a plurality of inspection cameras 410. The plurality of inspection cameras 410 are arranged at intervals along the edge of the pre-positioning platform 210 and can be driven by the driving component 420 to move along the edge of the pre-positioning platform 210.

[0049] The multiple inspection cameras 410 have the same function and structure, so the cut edge on each side of the pole piece 20 can be simultaneously imaged by multiple inspection cameras 410. This can further shorten the time required to inspect the burrs on a single pole piece 20 and further improve production efficiency.

[0050] The drive assembly 420 can be a linear motor, and multiple detection cameras 410 are mounted on the drive end of the linear motor. Specifically, in this embodiment, each visual inspection mechanism 400 also includes a support plate 450, which is mounted on the drive end of the drive assembly 420, and the detection camera 410 is mounted on the support plate 450. The support plate 450 provides a large installation area, facilitating the installation of components such as the detection camera 410. Multiple support plates 450 can be provided, and each detection camera 410 is respectively mounted on a corresponding support plate 450.

[0051] In this embodiment, each visual inspection mechanism 400 further includes a light source 430. The light emitted by the light source 430 can illuminate the pole piece supported on the pre-positioning platform 210, and the reflected light formed by the pole piece can be received by the inspection camera 410. The light source 430 can illuminate the cut edge of the pole piece 20, thereby making the image information obtained by the inspection camera 410 clearer, which helps to improve the accuracy of burr detection.

[0052] In addition, in this embodiment, each visual inspection mechanism 400 also includes a prism 440, which is arranged opposite to the edge of the pre-positioning platform 210. The optical axis of the inspection camera 410 extends in a direction perpendicular to the supporting surface of the pre-positioning platform 210. The reflected light emitted by the pole piece 20 can be refracted by the prism 440 and then received by the inspection camera 410.

[0053] Typically, to obtain image information of the cut edge of the pole piece 20, the lens of the detection camera 410 needs to be oriented toward the cut edge of the pole piece 20. Therefore, the detection camera 410 needs to be positioned horizontally, with its optical axis extending in the left-right direction as shown in FIG1 . Because the prism 440 can refract light, the lens of the detection camera 410 can be angled relative to the cut edge of the pole piece 20. Specifically, because the prism 440 can refract reflected light from the cut edge of the pole piece 20 by 90 degrees, the detection camera 410 can be positioned vertically, with its optical axis extending in the up-down direction as shown in FIG1 .

[0054] In this way, the horizontal space occupied by the visual inspection mechanism 400 can be reduced. In addition, the inspection camera 410 can be easily moved up and down, thereby adjusting the focal plane and depth of field of the inspection camera 410 to better obtain image information of the cut edge of the pole piece 20.

[0055] Referring again to FIG1 , in this embodiment, the pre-positioning mechanism 200 further includes a correction component 220 and a position detection component 230. The position detection component 230 is capable of acquiring position information of the pole piece 20, and the correction component 220 is capable of driving the pre-positioning platform 210 to translate and rotate based on the position information to correct the deviation of the pole piece 20 carried on the pre-positioning platform 210.

[0056] The deflection correction component 220 can use a motor, cylinder, or other device to drive the pre-positioning platform 210 to move. The position detection component 230 can use a CCD camera to obtain image information of the electrode 20 on the electrode removal mechanism 300 or the pre-positioning platform 210 by taking pictures, and determine whether the position of the electrode 20 is offset. If the position of the electrode 20 is offset, the deflection correction component 220 can drive the pre-positioning platform 210 to translate, rotate, or both according to the specific offset, thereby correcting the position of the electrode 20 carried on the pre-positioning platform 210.

[0057] It can be seen that the pre-positioning mechanism 200 can also play the role of a traditional deflection correction table, so there is no need to set up a separate deflection correction mechanism in the lamination equipment. Therefore, the burr detection device 10 can also simplify the process and save equipment.

[0058] Further, please refer to Figure 3. In this embodiment, the film-taking mechanism 300 can make the electrode 20 stay above the pre-positioning platform 210 during the process of transferring the electrode 20. The position detection component 230 can obtain the position information of the electrode 20 staying above the pre-positioning platform 210. The correction component 220 can drive the pre-positioning platform 210 from the origin position to the compensation position according to the position information to receive the electrode 20 staying above the pre-positioning platform 210, and drive the pre-positioning platform 210 from the compensation position back to the origin position to correct the electrode.

[0059] During the process of transferring the electrode 20, the film-taking mechanism 300 first transfers the electrode 20 to the top of the pre-positioning platform 210 and makes the electrode 20 not contact the pre-positioning platform 210. At this time, the position detection component 230 can obtain the position information of the electrode 20 to determine whether the electrode 20 is offset. Assuming that the electrode 20 is offset and the offset is a (a is a vector), the correction component 220 can drive the pre-positioning platform 210 to move the offset a to reach the compensation position. Then, the film-taking mechanism 300 places the electrode 20 on the driving pre-positioning platform 210, and the correction component 220 drives the pre-positioning platform 210 to move the offset -a and return to the origin position. In this way, the electrode 20 will move the offset -a with the pre-positioning platform 210, thereby offsetting the original offset and completing the correction.

[0060] Moreover, by correcting the pole piece 20 by first offsetting and then returning the pre-positioning platform 210, it can be ensured that the pre-positioning platform 210 is always at the origin position when the visual inspection mechanism 400 performs burr detection. This makes it convenient to calibrate the focal plane of the inspection camera 410 in advance so that the inspection camera 410 can better focus on the cut edge of the pole piece 20.

[0061] In the above-mentioned burr detection device 10 and lamination equipment, the electrode 20 obtained by slicing is carried by the conveying mechanism 100 and conveyed downstream, and is transferred to the pre-positioning platform 210 by the sheet-taking mechanism 300 before the lamination operation. Then, the visual inspection mechanism 400 can obtain image information of the edge of the cut of the electrode 20 to determine whether the burrs exceed the standard. The electrode 20 that fails the burr detection will be rejected, and the qualified electrode 20 will be transported to the lamination table by the lamination robot for lamination. Since the detection cameras 410 on both sides can simultaneously obtain image information of the two cut edges of the electrode 20, and each detection camera 410 can move along the edge of the pre-positioning platform 210 under the drive of the drive component 420, the burr detection speed of a single electrode 20 is relatively fast. After slicing, the electrode 20 can be sequentially transported, burr detected and laminated, and each process is connected and coherent. Therefore, the above-mentioned burr detection device 10 and lamination equipment can effectively improve production efficiency.

[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A burr detection device, characterized in that: include: A conveying mechanism capable of carrying and conveying the electrode; A pre-positioning mechanism, comprising a pre-positioning platform for carrying the pole piece; a film taking mechanism capable of transferring the electrode from the conveying mechanism to the pre-positioning platform; and Visual inspection mechanisms are provided on both sides of the pre-positioning platform, each of the visual inspection mechanisms includes a detection camera and a drive assembly, the detection camera is installed at the driving end of the drive assembly and can be driven by the drive assembly to move along the edge of the pre-positioning platform; The detection camera can obtain image information of the electrode carried on the pre-positioning platform for burr detection.

2. The burr detection device according to claim 1, characterized in that: The conveying mechanism is configured as a vacuum belt.

3. The burr detection device according to claim 1, characterized in that: The surface of the pre-positioning platform can form a negative pressure to absorb the carried electrode.

4. The burr detection device according to claim 1, characterized in that: The pre-positioning mechanism also includes a correction component and a position detection component. The position detection component can obtain the position information of the pole piece. The correction component can drive the pre-positioning platform to translate and rotate according to the position information to correct the pole piece carried on the pre-positioning platform.

5. The burr detection device according to claim 4, characterized in that: The film-picking mechanism can make the electrode stay above the pre-positioning platform during the process of transferring the electrode, the position detection component can obtain the position information of the electrode staying above the pre-positioning platform, and the correction component can drive the pre-positioning platform from the origin position to the compensation position according to the position information to receive the electrode staying above the pre-positioning platform, and drive the pre-positioning platform from the compensation position back to the origin position to correct the electrode.

6. The burr detection device according to claim 1, characterized in that: The film-taking mechanism includes a lifting component, a rotating component and a suction cup. The suction cup can absorb the electrode. The lifting component can drive the suction cup to rise and fall in a direction perpendicular to the bearing surface of the pre-positioning platform. The rotating component can drive the suction cup to rotate back and forth between the conveying mechanism and the pre-positioning platform along an axis perpendicular to the bearing surface of the pre-positioning platform.

7. The burr detection device according to claim 6, characterized in that: The rotating assembly is installed on the moving end of the lifting assembly, and the suction cup is arranged on the rotating end of the rotating assembly through a connecting rod.

8. The burr detection device according to claim 1, characterized in that: Each of the visual inspection mechanisms further includes a light source, the light emitted by the light source can illuminate the pole piece carried on the pre-positioning platform, and the reflected light formed by the pole piece can be received by the inspection camera.

9. The burr detection device according to claim 1, characterized in that: Each of the visual inspection mechanisms also includes a prism, which is arranged opposite to the edge of the pre-positioning platform. The optical axis of the inspection camera extends in a direction perpendicular to the supporting surface of the pre-positioning platform. The reflected light emitted by the pole piece can be refracted by the prism and received by the inspection camera.

10. The burr detection device according to claim 9, characterized in that: The prism can refract the reflected light from the cut edge of the pole piece by 90 degrees.

11. The burr detection device according to claim 9, characterized in that: The position of the detection camera is adjustable in a direction perpendicular to the carrying surface of the pre-positioning platform.

12. The burr detection device according to claim 1, characterized in that: Each of the visual inspection mechanisms includes a plurality of inspection cameras, which are arranged at intervals along the edge of the pre-positioning platform and can each move along the edge of the pre-positioning platform under the drive of the driving component.

13. A lamination device, characterized in that: It comprises a lamination table, a lamination robot and a burr detection device as described in any one of claims 1 to 12 above; the lamination robot can place the pole piece located on the pre-positioning platform on the lamination table to perform lamination operations.

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