Turnover detection device for square roll core tab

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a square roll core tab folding detection device, which comprises a winding machine large plate, a belt and a roll core body, a fixed support is vertically arranged on the surface of the winding machine large plate, a winding machine is arranged at the lower end of the winding machine large plate, the belt is arranged on the surface of the winding machine, and the roll core body is arranged on the belt. The winding core body is arranged on the upper surface of the belt, and a positive tab is arranged at one end, far away from the winding machine large plate, of the winding core body. When the device is used, online detection can be carried out in the transportation process of the winding core body, and the production efficiency of the winding battery core is not influenced; according to the method, the width, the height and the number of layers of the tabs can be recognized by analyzing the acquired data and acquiring the tab images of the tabs in the stable stacking state, and whether the tabs are in the folded state or not can be accurately detected by combining the preset parameters such as the tab folding state and the number of layers, so that the outflow of the tabs in the abnormal state is reduced, and the working efficiency is improved. The battery safety problem is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a square winding core tab folding detection device. Background Art

[0002] The copper and aluminum electrodes of lithium battery winding tabs are made of two materials and the tabs are folded during production, resulting in a short circuit and a safety problem. At present, in the battery winding machine structure, the tab status is detected by infrared sensor shooting and color grayscale value judgment. However, due to the structure of the core itself, the tabs may be folded or bent to the inside of the electrode film area at any time before winding, forming a monitoring blind spot. Even if a 3D area array camera is used for visual inspection, there is still a detection blind spot from the camera shooting position to the overlapping position of the front and rear tabs, which makes it impossible to monitor the tabs throughout the process, so the accuracy of the tab status detection cannot be guaranteed. Therefore, a square core tab folding detection device is used to effectively detect the material.

[0003] However, the existing processing equipment has the following deficiencies: the tab folding detection device and the tab folding detection system are configured by arranging three sets of visual detection devices on the left, right and front sides of the core at the unloading position of the core, i.e., line scan or area array cameras + liquid lenses are used on the left and right sides; a combination of line scan or area array cameras + FA lenses is used on the front side to effectively detect whether the tab is folded or missing a layer through the visual processing system, which has a simple structure and high recognition accuracy; the tab folding detection efficiency in the existing technology is low and the detection effect is easily affected by light; the outflow of tabs in abnormal conditions causes battery safety problems.

[0004] Therefore, we propose a square core tab folding detection device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art, that is, the tab folding detection efficiency is low and the detection effect is easily affected by light, and to propose a square winding core tab folding detection device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a square core tab folding detection device, comprising a winding machine plate, a belt and a core body, a fixed bracket is vertically installed on the surface of the winding machine plate, a winding machine is provided at the lower end of the winding machine plate, the belt is installed on the surface of the winding machine, the core body is arranged on the upper surface of the belt, a positive tab is provided on the end of the core body away from the winding machine plate, a negative tab is provided on the end of the core body away from the winding machine plate, a second light source is provided on the surface of the fixed bracket, and a first light source is provided on the right side of the second light source.

[0007] Furthermore, the first light source is arranged on the surface of the fixing bracket.

[0008] Furthermore, a third light source is provided on the right side of the first light source.

[0009] Furthermore, the third light source is arranged on the surface of the fixing bracket.

[0010] Furthermore, a second detection camera is provided on one end surface of the winding machine large plate.

[0011] Furthermore, a third detection camera is provided at one end of the winding machine plate away from the second detection camera.

[0012] Furthermore, a first detection camera is provided at the middle end of the surface of the large plate of the winding machine.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] In the present invention, the first, second and third detection cameras are used to capture the images of the tabs, which are obtained by capturing the positive and negative tabs under the illumination of the first, second and third light sources. The images are then processed based on AI segmentation detection + Blob extraction + obtaining the area and grayscale value of the target defect area + judging whether the detection of the tab area image has been achieved, to determine whether the tab has been folded. When the equipment is in use, online detection can be performed during the transportation of the winding core body without affecting the production efficiency of the wound battery cell. The acquired data can be analyzed to collect the tab images of the tabs in a stable stacking state to identify the width, height and number of layers of the tabs. Combined with the preset parameters such as the tab folding state and number of layers, it is possible to accurately detect whether the tabs are folded, thereby reducing the outflow of tabs in abnormal conditions and causing battery safety problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a square core tab folding detection device proposed in the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of a square core tab folding detection device proposed in the utility model;

[0017] Figure 3 The utility model provides a working flow chart of a square winding core tab folding detection device.

[0018] Legend: 1. Winding machine plate; 2. Second light source; 3. Second detection camera; 4. First light source; 5. First detection camera; 6. Winding core body; 601. Positive electrode ear; 602. Negative electrode ear; 7. Belt; 8. Third detection camera; 9. Third light source. DETAILED DESCRIPTION

[0019] See also Figure 1-Figure 3 The utility model provides a technical solution: a square winding core tab folding detection device, including a winding machine plate 1, a belt 7 and a winding core body 6.

[0020] The following is a detailed description of the specific settings and functions of a square core tab folding detection device.

[0021] The structure of the tab folding detection device of the embodiment of the present application mainly includes a first detection camera 5, a first light source 4, a second detection camera 3, a second light source 2, a third detection camera 8, a third light source 9, a core body 6, a belt 7, and a winding plate; wherein the fixed bracket is vertically installed on the winding machine plate 1, and the first detection camera 5, the first light source 4, the second detection camera 3, the second light source 2, the third detection camera 8, and the third light source 9 are installed on the fixed bracket; the belt 7 is installed on the winding machine, and the core body 6 is transported to the belt 7 through the unloading mechanism, and the lower belt 7 transports the core body 6 to the CCD detection position.

[0022] Specifically, after the core body 6 reaches the CCD detection position, the detection camera detects the status of the positive ear 601 and the negative ear 602 of the core body 6, and the core detection component detects whether the core body 6 appears, so that when the positive ear 601 and the negative ear 602 appear, the lower computer triggers the first detection camera 5, the second detection camera 3 and the third detection camera 8 to start shooting, and the image of the ear status is obtained after shooting.

[0023] Specifically, the first light source 4 is located directly above the pole ear along the height direction of the core body 6, and is completely perpendicular to the first camera along the height direction of the core body 6, providing the first camera with the light required to acquire the image; at this time, the first detection camera 5 is located directly in front of the positive pole ear 601 and the negative pole ear along the height direction of the core body 6, so as to obtain the status image of the positive pole ear and the negative pole ear on the front of the core body 6.

[0024] Specifically, during the implementation process, the second light source 2 is located directly above the pole ear of the core body 6 along the height direction, and is completely perpendicular to the second camera along the height direction of the core body 6, providing the second camera with the light required to obtain the image; at this time, the second detection camera 3 is located directly in front of the positive pole ear 601 along the height direction of the core body 6, so as to obtain the positive pole ear status image on the side of the core body 6.

[0025] Specifically, during the implementation process, the third light source 9 is located directly above the pole ear of the core body 6 along the height direction, and is completely perpendicular to the third camera along the height direction of the core body 6, providing the third camera with the light required to obtain the image; at this time, the third detection camera 8 is located directly in front of the negative pole ear 602 along the height direction of the core body 6, so as to obtain the negative pole ear status image on the side of the core body 6.

[0026] Specifically, during the implementation process, the first detection camera 5 detects and takes images of the front side of the positive electrode tab and the negative electrode tab, and the second detection camera 3 and the third detection camera 8 respectively detect and take images of the side area of ​​the positive electrode tab and the side of the tab state of the negative electrode tab, and transmit them to the host computer system respectively according to the preset specification parameters to determine the top edge of the tab of the negative electrode tab and the positive electrode tab in the tab image, identify the number of layers of the multi-layer positive tab 601 and the negative tab 602 and the different degrees of folding, and determine the tab folding;

[0027] Specifically, during the implementation process, based on the image of the degree of tab folding, traditional algorithms and deep learning algorithms such as AI segmentation detection + Blob extraction + obtaining the area and grayscale value of the target defect area + judgment and Gaussian line finding + line finding + straightness detection or AI segmentation detection + area, width and height and other parameter filtering, or AI segmentation detection + area, width and height, grayscale mean and other parameter filtering are used to comprehensively identify and determine the folding features to determine whether the tab is folded.

[0028] Working principle: The first, second and third detection cameras 8 are used to capture the image of the tabs. The tab images are obtained by capturing the positive and negative tabs 602 under the illumination of the first, second and third light sources 9, and based on AI segmentation detection + Blob extraction + obtaining the area and grayscale value of the target defect area + judging whether the detection of the tab area image has reached the detection level, it is determined whether the tabs are folded. When the equipment is in use, online detection can be performed during the transportation of the winding core body 6 without affecting the production efficiency of the wound battery cells. The acquired data can be analyzed, and the tab images of the tabs in a stable stacking state can be collected to identify the width, height and number of layers of the tabs. Combined with the preset tab folding state, number of layers and other parameters, it can accurately detect whether the tabs are folded, thereby reducing the outflow of abnormal tabs and causing battery safety problems.

Claims

1. A square winding core tab folding detection device, comprising a winding machine plate (1), a belt (7) and a winding core body (6), characterized in that: A fixed bracket is vertically mounted on the surface of the winding machine large plate (1), a winding machine is arranged at the lower end of the winding machine large plate (1), the belt (7) is mounted on the surface of the winding machine, the winding core body (6) is arranged on the upper surface of the belt (7), a positive electrode ear (601) is arranged at one end of the winding core body (6) away from the winding machine large plate (1), a negative electrode ear (602) is arranged at one end of the winding core body (6) away from the winding machine large plate (1), a second light source (2) is arranged on the surface of the fixed bracket, and a first light source (4) is arranged on the right side of the second light source (2).

2. The square winding core tab folding detection device according to claim 1, characterized in that: The first light source (4) is arranged on the surface of the fixing bracket.

3. The square winding core tab folding detection device according to claim 1, characterized in that: A third light source (9) is provided on the right side of the first light source (4).

4. The square winding core tab folding detection device according to claim 3, characterized in that: The third light source (9) is arranged on the surface of the fixing bracket.

5. The square winding core tab folding detection device according to claim 1, characterized in that: A second detection camera (3) is provided on one end surface of the winding machine large plate (1).

6. The square winding core tab folding detection device according to claim 5, characterized in that: A third detection camera (8) is provided at one end of the winding machine plate (1) away from the second detection camera (3).

7. The square winding core tab folding detection device according to claim 5, characterized in that: A first detection camera (5) is provided at the middle end of the surface of the winding machine large plate (1).

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