Equipment for detecting burrs on electrode sheets and its working method

Abstract

This invention belongs to the field of detection technology, specifically relating to a burr detection device for electrode sheets and its working method. The burr detection device for electrode sheets includes: a conveying assembly for conveying electrode sheets with tabs, comprising at least one conveying roller and forming an arc-shaped corner position; a rotating frame disposed at the arc-shaped corner position of the conveying assembly, comprising: a connecting shaft and a mounting plate, wherein the connecting shaft is coaxially arranged and connected to the conveying roller, and the mounting plate is sleeved on the connecting shaft; and a plurality of industrial vision cameras disposed on the mounting plate and evenly distributed circumferentially. The burr detection device for electrode sheets and its working method achieve this by having the industrial vision cameras rotate coaxially with the conveying roller and maintain the same angular velocity. That is, when the industrial vision camera rotates to the arc-shaped corner position, the industrial vision camera maintains the same angular velocity as the electrode sheet within the acquisition area, thereby making the industrial vision camera relatively stationary with respect to the electrode sheet within the acquisition area.

Description

Technical Field

[0001] This invention belongs to the field of detection technology, specifically relating to the detection of lithium batteries, and particularly to a burr detection device for electrode sheets and its working method. Background Technology

[0002] A cylindrical lithium battery consists of at least a battery casing, a battery cell, and a battery cover. The battery cell is formed by winding a thin film and electrode sheets, and the electrode sheets need to form tabs on the sides. These tabs are generally formed by a stamping process, which can easily create burrs on the sides of the electrode sheets, causing the thin film to puncture during subsequent winding.

[0003] In related technologies, after the electrode sheet forms the tab, a vision industrial camera is needed to detect burrs on its sides; however, in order to improve the conveying efficiency, the vision industrial camera needs to take pictures of the sides of the electrode sheet during the conveying process, but this kind of photography during movement is prone to producing motion blur.

[0004] Therefore, how to solve the above problems is a problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one burr detection device for electrode sheets and its working method.

[0007] In a first aspect, embodiments of this disclosure provide a burr detection device for electrode sheets, comprising: a conveying assembly for conveying an electrode sheet with tabs, the assembly including at least one conveying roller and forming an arc-shaped corner position; a rotating frame disposed at the arc-shaped corner position of the conveying assembly, comprising: a connecting shaft and a mounting plate, the connecting shaft being coaxially arranged and connected to the conveying roller at the arc-shaped corner position, the mounting plate being sleeved on the connecting shaft; a plurality of industrial vision cameras disposed on the mounting plate and evenly distributed circumferentially, the circle formed by the arrangement of the industrial vision cameras coinciding with the circle formed by the electrode sheet at the arc-shaped corner position; wherein the angular velocities of the industrial vision cameras and the electrode sheet at the arc-shaped corner position are the same, so that the industrial vision cameras and the electrode sheet are relatively stationary at the arc-shaped corner position; and a control module configured to control the conveying assembly to convey the electrode sheet, and simultaneously control each industrial vision camera to take a picture of the electrode sheet after fully entering the arc-shaped corner position.

[0008] In one optional implementation, the angle θ corresponding to the arc-shaped turning position ranges from 90 degrees to 180 degrees.

[0009] In one optional implementation, the angle θ corresponding to the arc-shaped corner position is 180 degrees.

[0010] In one alternative embodiment, the industrial vision camera is positioned facing the side of the electrode sheet; wherein at the arc-shaped corner, the angle β corresponding to the acquisition area of ​​the electrode sheet by the industrial vision camera ranges from 60 degrees to 80 degrees; the industrial vision camera is adapted to acquire images when the angle β is completely within the angle θ.

[0011] In one alternative implementation, the acquisition areas of adjacent vision industrial cameras overlap and the corresponding angle α ranges from 5 degrees to 10 degrees.

[0012] In one alternative implementation, the ratio of the angle β to the angle θ is greater than 1 / 4.

[0013] In one alternative embodiment, the rotating frame further includes a driver; wherein the driving end of the driver is connected to the connecting shaft and is adapted to drive the connecting shaft to rotate so that the connecting shaft and the conveying roller rotate synchronously.

[0014] Secondly, this disclosure also provides a method for operating an electrode sheet burr detection device, comprising: conveying an electrode sheet with tabs via a conveying assembly, forming an arc-shaped corner position; setting a rotating frame at the arc-shaped corner position of the conveying assembly; setting a plurality of industrial vision cameras on the rotating frame; aligning the circle formed by the arrangement of the industrial vision cameras with the circle formed by the electrode sheet at the arc-shaped corner position; wherein the angular velocities of the industrial vision cameras and the electrode sheet are the same at the arc-shaped corner position, so that the industrial vision cameras and the electrode sheet are relatively stationary at the arc-shaped corner position; controlling the conveying assembly to convey the electrode sheet via a control module, and simultaneously controlling each industrial vision camera to take a picture of the electrode sheet after it has fully entered the arc-shaped corner position.

[0015] In one alternative embodiment, the rotating frame includes a connecting shaft and a mounting plate, the connecting shaft being coaxially arranged and connected to the conveying roller, and the mounting plate being sleeved on the connecting shaft.

[0016] In one optional implementation, the angle θ corresponding to the arc-shaped corner position is in the range of 90 degrees to 180 degrees; wherein at the arc-shaped corner position, the angle β corresponding to the acquisition area of ​​the vision industrial camera is in the range of 60 degrees to 80 degrees; the vision industrial camera is adapted to acquire images when the angle β is completely within the angle θ.

[0017] The beneficial effect of this invention is that the burr detection equipment and its working method for electrode sheets achieve this by having a vision industrial camera rotate coaxially with the conveyor roller and maintain the same angular velocity. That is, when the vision industrial camera rotates to the arc-shaped corner position, the vision industrial camera and the electrode sheet in the acquisition area maintain the same angular velocity, thereby making the vision industrial camera and the electrode sheet in the acquisition area relatively stationary, so that the vision industrial camera can take pictures and acquire images. In other words, the vision industrial camera can acquire images during the electrode sheet conveying process and make the images clear.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a burr detection device for electrode sheets provided in an embodiment of the present disclosure; Figure 2 This is a side view of a burr detection device for electrode sheets provided in an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of an electrode sheet provided in an embodiment of this disclosure.

[0022] In the picture: Conveying assembly 1, conveying roller 11, arc-shaped corner position 12; Rotating frame 2, connecting shaft 21, mounting plate 22, driver 23; Visual industrial camera 3; Electrode 4, tab 41. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the figures, the thickness of parts may be exaggerated or reduced for the purpose of effectively depicting the technical content.

[0025] The formation of a battery cell includes: unwinding, stamping (stamping the unwound metal strip to form several tabs), testing, winding, cutting, and fixing.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figures 1 to 3 As shown, at least one embodiment provides a burr detection device for electrode sheets, including: a conveying assembly 1, a rotating frame 2, and a plurality of vision industrial cameras 3.

[0028] Specifically, the conveying assembly 1 is used to convey the electrode sheet 4 with tabs 41, which includes at least one conveying roller 11 and forms an arc-shaped corner position 12.

[0029] Specifically, the rotating frame 2 is located at the arc-shaped corner position 12 of the conveying assembly 1; the rotating frame 2 includes: a connecting shaft 21 and a mounting plate 22; wherein, the connecting shaft 21 is coaxially arranged and connected with the conveying roller 11, and the mounting plate 22 is sleeved on the connecting shaft 21.

[0030] Specifically, the industrial vision cameras 3 are mounted on the mounting plate 22 and are evenly distributed around the circumference; wherein, the circle formed by the arrangement of the industrial vision cameras 3 coincides with the circle formed by the electrode sheet 4 at the arc-shaped corner position 12.

[0031] In this embodiment, when the industrial vision camera 3 rotates to the arc-shaped corner position 12, the industrial vision camera 3 and the electrode plate 4 in the acquisition area maintain the same angular velocity, so that the industrial vision camera 3 and the electrode plate 4 in the acquisition area are relatively stationary, so that the industrial vision camera 3 can take pictures to acquire images, and thus the industrial vision camera 3 can acquire images during the electrode plate 4 transportation process and make the images clear.

[0032] In some embodiments, both the conveying assembly 1 and the vision industrial camera 3 are electrically connected to the control module; the control module is configured to control the conveying assembly 1 to convey the electrode sheet 4, and at the same time control each vision industrial camera 3 to take pictures of the electrode sheet 4 after fully entering the arc-shaped corner position 12.

[0033] In some embodiments, the control module may be, but is not limited to, a PLC.

[0034] In some embodiments, the electrode sheet changes its conveying direction at a conveying roller 11 in the conveying assembly 1, which is the arc-shaped turning point 12; wherein the size of the arc-shaped turning point 12 is related to the angle at which the conveying direction is changed.

[0035] like Figure 2 As shown, in some embodiments, the angle θ corresponding to the arc-shaped corner position 12 ranges from 90 degrees to 180 degrees.

[0036] In this embodiment, when the angle θ is too small, the synchronous rotation time between the industrial vision camera 3 and the electrode plate 4 will be too short, resulting in an image area acquired by the industrial vision camera 3 being too small.

[0037] In some embodiments, preferably, the angle θ corresponding to the arc-shaped corner position 12 is 180 degrees.

[0038] In some embodiments, preferably, the control module controls the industrial vision camera 3 to take a picture when it rotates to the middle of the arc-shaped corner position 12.

[0039] like Figure 1 , Figure 2 As shown, in some embodiments, the vision industrial camera 3 is positioned facing the side of the electrode sheet 4.

[0040] In this embodiment, since the direction of the burrs is the same as the stamping direction during the stamping process of forming the electrode tab, the burrs protrude from the surface of the electrode sheet 4 to puncture the diaphragm during winding; therefore, by acquiring the side image of the electrode sheet 4 by the vision industrial camera 3, the burrs can be identified more clearly.

[0041] like Figure 2 As shown, in some embodiments, at the arc-shaped corner position 12, the angle β corresponding to the acquisition area of ​​the electrode plate 4 of the vision industrial camera 3 is in the range of 60 degrees to 80 degrees, and the vision industrial camera 3 is suitable for image acquisition when the angle β is completely within the angle θ.

[0042] In this embodiment, the angle β corresponding to the acquisition area of ​​the visual industrial camera 3 and the electrode plate 4 is less than the angle θ corresponding to the arc corner position 12, so that the visual industrial camera 3 and the electrode plate 4 can remain stationary at the arc corner position 12 for a period of time to acquire images.

[0043] In some embodiments, analyzing the acquired images is a prior art, and this embodiment does not improve upon it.

[0044] like Figure 2 As shown, in some embodiments, the acquisition areas of adjacent visual industrial cameras 3 overlap and the corresponding angle α ranges from 5 degrees to 10 degrees.

[0045] In this embodiment, the acquisition areas of adjacent industrial vision cameras 3 overlap to avoid areas of the electrode sheet 4 that are not acquired.

[0046] like Figure 2 As shown, in some embodiments, the ratio of angle β to angle θ is greater than 1 / 4.

[0047] In this embodiment, the above-mentioned ratio setting is to minimize the number of visual industrial cameras 3 required.

[0048] In some embodiments, optionally, the angle θ corresponding to the arc-shaped corner position 12 is 180 degrees, the number of vision industrial cameras 3 is 6, the angle β corresponding to the acquisition area of ​​the vision industrial camera 3 and the electrode sheet 4 is in the range of 70 degrees, and the acquisition areas of adjacent vision industrial cameras 3 overlap and the corresponding angle α is in the range of 5 degrees.

[0049] like Figure 1 As shown, in some embodiments, the rotating frame 2 further includes a driver 23; wherein the driving end of the driver 23 is connected to the connecting shaft 21 and is adapted to drive the connecting shaft 21 to rotate so that the connecting shaft 21 and the conveying roller 11 rotate synchronously.

[0050] In this embodiment, the driver 23 may be, but is not limited to, a servo motor; the connecting shaft 21 and the conveying roller 11 have the same axis and are connected to each other, that is, the driver 23 only needs to drive one of them to rotate to make the two rotate synchronously.

[0051] In some embodiments, the mounting plate 22 is sleeved on and connected to the connecting shaft 21; each vision industrial camera 3 is arranged around the periphery of the connecting shaft 21, that is, when the driver 23 drives the connecting shaft 21 to rotate, it simultaneously drives the mounting plate 22 to rotate, so that each vision industrial camera 3 revolves.

[0052] like Figure 1As shown, at least one embodiment also provides a method for operating an electrode sheet burr detection device, comprising: conveying an electrode sheet 4 with tabs 41 through a conveying assembly 1, forming an arc-shaped corner position 12; setting a rotating frame 2 at the arc-shaped corner position 12 of the conveying assembly 1; setting a plurality of vision industrial cameras 3 on the rotating frame 2; aligning the circle formed by the arrangement of the vision industrial cameras 3 with the circle formed by the electrode sheet 4 at the arc-shaped corner position 12; and making the angular velocities of the vision industrial cameras 3 and the electrode sheet 4 the same at the arc-shaped corner position 12, so that the vision industrial cameras 3 and the electrode sheet 4 are relatively stationary at the arc-shaped corner position 12.

[0053] For the specific structure and implementation process of the burr detection equipment for electrode sheets, please refer to the relevant discussion in the above embodiments, which will not be repeated here.

[0054] In this embodiment, when the industrial vision camera 3 rotates to the arc-shaped corner position 12, the industrial vision camera 3 and the electrode plate 4 in the acquisition area maintain the same angular velocity, so that the industrial vision camera 3 and the electrode plate 4 in the acquisition area are relatively stationary, so that the industrial vision camera 3 can take pictures to acquire images, and thus the industrial vision camera 3 can acquire images during the electrode plate 4 transportation process and make the images clear.

[0055] In some embodiments, the rotating frame 2 includes a connecting shaft 21 and a mounting plate 22; wherein the connecting shaft 21 is coaxially arranged and connected to the conveying roller 11, and the mounting plate 22 is sleeved on the connecting shaft 21.

[0056] Specifically, the rotating frame 2 also includes: a driver 23; the driving end of the driver 23 is connected to one end of the connecting shaft 21, the other end of the connecting shaft 21 is connected to the conveying roller 11, the mounting plate 22 is sleeved on the connecting shaft 21 and connected to the connecting shaft 21, and each vision industrial camera 3 is arranged around the periphery of the connecting shaft 21.

[0057] In this embodiment, the driver 23 may be, but is not limited to, a servo motor; the connecting shaft 21 and the conveying roller 11 have the same axis and are connected to each other, that is, the driver 23 only needs to drive one of them to rotate to make the two rotate synchronously.

[0058] In some embodiments, the angle θ corresponding to the arc corner position 12 is in the range of 90 degrees to 180 degrees; wherein at the arc corner position 12, the angle β corresponding to the acquisition area of ​​the visual industrial camera 3 is in the range of 60 degrees to 80 degrees; the visual industrial camera 3 is adapted to acquire images when the angle β is completely within the angle θ.

[0059] In summary, this electrode sheet burr detection device and its working method achieve this by having the industrial vision camera 3 rotate coaxially with the conveyor roller 11 and maintain the same angular velocity. That is, when the industrial vision camera 3 rotates to the arc-shaped corner position 12, the industrial vision camera 3 and the electrode sheet 4 in the acquisition area maintain the same angular velocity, thereby making the industrial vision camera 3 relatively stationary with respect to the electrode sheet 4 in the acquisition area. This allows the industrial vision camera 3 to take pictures and acquire images, enabling the industrial vision camera 3 to acquire images during the conveying of the electrode sheet 4 and reducing motion blur to make the image clear.

[0060] In this document, when it is said that the first component is located on the second component, this can mean that the first component can be directly formed on the second component, or that the third component can be inserted between the first component and the second component.

[0061] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0062] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0063] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A burr detection device for electrode sheets, characterized in that, include: The conveying assembly (1) is used to convey an electrode sheet (4) with tabs (41), which includes at least one conveying roller (11) and forms an arc-shaped corner position (12). A rotating frame (2) is set at the arc-shaped corner position (12) of the conveying assembly (1), and includes a connecting shaft (21) and a mounting plate (22). The connecting shaft (21) is coaxially arranged and connected with the conveying roller (11) at the arc-shaped corner position (12), and the mounting plate (22) is sleeved on the connecting shaft (21). Several industrial vision cameras (3) are mounted on a mounting plate (22) and are evenly distributed around the circumference. The circle formed by the arrangement of the industrial vision cameras (3) coincides with the circle formed by the electrode plate (4) at the arc corner position (12). The angular velocities of the industrial vision cameras (3) and the electrode plate (4) at the arc corner position (12) are the same, so that the industrial vision cameras (3) and the electrode plate (4) are relatively stationary at the arc corner position (12). The control module is configured to control the conveying assembly (1) to convey the electrode sheet (4) and simultaneously control each vision industrial camera (3) to take pictures of the electrode sheet (4) after it has fully entered the arc corner position (12).

2. The burr detection device for electrode sheets as described in claim 1, characterized in that, The angle θ corresponding to the arc-shaped corner position (12) ranges from 90 degrees to 180 degrees.

3. The burr detection device for electrode sheets as described in claim 2, characterized in that, The angle θ corresponding to the arc-shaped corner position (12) is 180 degrees.

4. The burr detection device for electrode sheets as described in claim 3, characterized in that, The industrial vision camera (3) is positioned on the side facing the electrode plate (4); wherein At the arc-shaped corner position (12), the angle β corresponding to the acquisition area of ​​the electrode sheet (4) of the vision industrial camera (3) is in the range of 60 degrees to 80 degrees; The vision industrial camera (3) is adapted to acquire images when angle β is completely within angle θ.

5. The burr detection device for electrode sheets as described in claim 4, characterized in that, The acquisition areas of adjacent vision industrial cameras (3) overlap and the corresponding angle α ranges from 5 degrees to 10 degrees.

6. The burr detection device for electrode sheets as described in claim 4, characterized in that, The ratio of the angle β to the angle θ is greater than 1 / 4.

7. The burr detection device for electrode sheets as described in claim 1, characterized in that, The rotating frame (2) further includes: a driver (23); wherein The drive end of the driver (23) is connected to the connecting shaft (21) and is adapted to drive the connecting shaft (21) to rotate so that the connecting shaft (21) and the conveying roller (11) rotate synchronously.

8. A method for operating a burr detection device for electrode sheets, characterized in that, include: The electrode sheet (4) with tabs (41) is conveyed by the conveying assembly (1) and forms an arc-shaped corner position (12). By setting the rotating frame (2) at the arc-shaped corner position (12) of the conveying assembly (1); By mounting several industrial vision cameras (3) on a rotating frame (2); Make the circle formed by the arrangement of the industrial vision camera (3) coincide with the circle formed by the electrode plate (4) at the arc corner position (12); wherein the angular velocities of the industrial vision camera (3) and the electrode plate (4) at the arc corner position (12) are the same, so that the industrial vision camera (3) and the electrode plate (4) are relatively stationary at the arc corner position (12). The control module controls the conveying assembly (1) to convey the electrode sheet (4), and at the same time controls each vision industrial camera (3) to take pictures of the electrode sheet (4) after it has fully entered the arc corner position (12).

9. The working method of the burr detection device for electrode sheets as described in claim 8, characterized in that, The rotating frame (2) includes a connecting shaft (21) and a mounting plate (22). The connecting shaft (21) is coaxially arranged and connected to the conveying roller (11), and the mounting plate (22) is sleeved on the connecting shaft (21).

10. The working method of the burr detection device for electrode sheets as described in claim 9, characterized in that, The angle θ corresponding to the arc-shaped corner position (12) ranges from 90 degrees to 180 degrees; where At the arc-shaped corner position (12), the angle β corresponding to the acquisition area of ​​the visual industrial camera (3) is in the range of 60 degrees to 80 degrees; The vision industrial camera (3) is suitable for image acquisition when the angle β is completely within the angle θ.

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