Composite material belt screening device and thermal composite lamination machine
By using the image collector and cutter in the production of lithium-ion batteries, the defects of the pole sheet are automatically detected and eliminated, and the problem of low cell yield caused by the pole sheet defects is solved, and the excellent rate and cost reduction of cell production are improved.
Patent Information
- Application Number
- CN202422119268.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-08-30
AI Technical Summary
During the production process of lithium-ion batteries, the electrode sheet has defects such as damage, stains or local dimensional deviations, causing the defective electrode sheet to flow into the subsequent process, affecting the battery cell yield.
An image collector is used to detect the defects of the electrode sheet, and the defective electrode sheet is eliminated based on the detection results through a cutting knife. At the same time, the good electrode sheet continues to be transmitted to participate in the subsequent process. The detection accuracy is improved by the cooperation of the light source and the image collector, and the controller realizes automatic cutting.
Effectively eliminate bad electrode sheets, improve battery cell production yield, save raw materials, and reduce production costs.
Smart Images
Figure CN223209979U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery manufacturing, and in particular to a composite material strip screening device and a hot composite lamination machine. Background Art
[0002] When producing battery cells, the lithium-ion battery high-speed hot composite stacking machine needs to cut the coil into single sheets, and then thermally composite the positive and negative electrode single sheets with the separator to form a composite sheet, and stack the composite sheets on each other to form a completed battery cell.
[0003] In actual production, incoming electrode materials often have defects such as damage, stains, or local dimensional deviations. During the tape conveying process, electrode pieces are often scratched or damaged. These defective electrode pieces flow into subsequent processes, which will affect the yield of the battery cells. Utility Model Content
[0004] The purpose of the present application is to provide a composite material strip screening device and a hot composite lamination machine, which can remove defective electrodes to prevent these defective electrodes from flowing into subsequent processes and being combined with other good electrodes to form battery cells. At the same time, the good electrodes continue to be transported backward after being cut by the cutter, and participate in the process of synthesizing composite sheets, stacking electrodes into battery cells, etc., to complete the manufacturing of the entire battery cell, and effectively improve the quality rate of battery cell production.
[0005] The embodiments of the present application can be implemented as follows:
[0006] In a first aspect, the present invention provides a composite strip screening device, comprising:
[0007] An image collector is used to align the strip with the material to collect image data, thereby detecting whether the strip has defects;
[0008] A cutter is located on the downstream side of the image collector in the conveying direction of the material strip, and is used to cut the material strip according to the detection result of the image collector to remove defective electrodes.
[0009] In an optional embodiment, the composite material strip screening device further includes a light source, which is used to align with the material strip, the light source and the image collector are located on the same side of the material strip, and the light output axis of the light source and the light input axis of the image collector intersect.
[0010] In an optional embodiment, the angle α formed by the light-emitting axis of the light source and the light-incident axis of the image collector is 20-40°.
[0011] In an optional embodiment, the angle α is 30°.
[0012] In an optional embodiment, the composite material strip screening device further includes a roller, and the roller and the image collector are respectively located on the front and back sides of the material strip.
[0013] In an optional embodiment, the incident light axis of the image collector is perpendicular to and intersects with the central axis of the roller.
[0014] In an optional embodiment, the composite material strip screening device further includes a waste frame, which is located below the cutter and is used to receive defective electrodes.
[0015] In an optional embodiment, the image collector includes a line scan camera.
[0016] In a second aspect, the present invention provides a thermal composite lamination machine, comprising the composite material strip screening device described in any one of the aforementioned embodiments.
[0017] In an optional embodiment, the thermal composite lamination machine further includes a controller, and the controller is electrically connected to the image collector and the cutter.
[0018] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:
[0019] By setting up an image collector, when the material belt passes through the image collector, the image collector can determine whether there are defects such as scratches, breakages, stains or local dimensional deviations on the surface of the local area of the material belt corresponding to the image sensor at this time. As the material belt continues to be conveyed, the defective parts on the material belt pass through the cutter located on the downstream side of the image collector. The cutter can remove the defective parts on the material belt, thereby removing the defective electrodes to prevent these defective electrodes from flowing into subsequent processes and being combined with other good electrodes to form battery cells. At the same time, the good electrodes continue to be conveyed backward after being cut by the cutter, and participate in the process of synthesizing the composite sheets, stacking the electrodes into battery cells, etc., to complete the manufacturing of the entire battery cell, effectively improving the quality rate of battery cell production. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0021] Figure 1 This is a schematic diagram of a composite material strip screening device according to an embodiment of the present application.
[0022] Icons: 100-composite material strip screening device; 110-image collector; 120-cutter; 130-light source; 140-waste frame; 200-material strip; 210-defective electrode; 220-qualified electrode. DETAILED DESCRIPTION
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.
[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0028] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0029] The following combination Figure 1 , some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0030] The present application discloses a composite material strip screening device 100 and a thermal composite lamination machine equipped with the composite material strip screening device 100. The composite material strip screening device 100 includes an image collector 110 and a cutter 120. The image collector 110 is used to align with the material strip 200 to collect image data, thereby detecting whether there are defects on the surface of the material strip 200. The cutter 120 is located downstream of the image collector 110 in the conveying direction of the material strip 200. The cutter 120 is used to cut the material strip 200 based on the detection results of the image collector 110 to eliminate defective pole pieces 210.
[0031] In this way, by setting up the image collector 110, when the material strip 200 passes through the image collector 110, the image collector 110 can determine whether there are defects such as scratches, breakages, stains or local dimensional deviations on the surface of the local area of the material strip 200 corresponding to the image sensor at this time. As the material strip 200 continues to be conveyed, after the defective parts on the material strip 200 pass through the cutter 120 located on the downstream side of the image collector 110, the defective parts on the material strip 200 can be removed by the cutter 120, thereby removing the defective electrodes 210 to prevent these defective electrodes 210 from flowing into subsequent processes and being combined with other good electrodes 220 to form battery cells. At the same time, the good electrodes 220 continue to be conveyed backward after being cut by the cutter 120, and participate in the process of synthesizing the composite sheets, stacking the electrodes into battery cells, etc., to complete the manufacturing of the entire battery cell, effectively improving the quality rate of battery cell production.
[0032] In addition, in the present application, the defective electrode 210 can be automatically removed before the material strip 200 is cut, avoiding the problem of marking the defects in the prior art, and then flowing into the subsequent process to be manufactured into battery cells and then manually inspecting and removing the defective battery cells, which leads to waste of raw materials, consumption of a lot of manpower and material resources, and high battery cell production costs. Therefore, raw materials can be saved and the battery cell production costs can be reduced.
[0033] The composite material strip screening device 100 also includes a roller, and the roller and the image collector 110 are respectively located on the front and back sides of the material strip 200. The roller rotates as the composite material strip 200 is conveyed to support the material strip 200 through the roller to facilitate subsequent cutting.
[0034] The composite material strip screening device 100 also includes a light source 130, which is used to align the material strip 200. The light source 130 and the image collector 110 are located on the same side of the material strip 200, and the light output axis of the light source 130 intersects with the light input axis of the image collector 110. In this way, the light source 130 is used to provide illumination for the image acquisition area of the image collector 110, so that the image collector 110 can be more adaptable to situations where there is relative movement between the material strip 200 and the camera. The image collector 110 has a higher resolution and image acquisition field of view to improve the accuracy of defect judgment.
[0035] The angle α between the light output axis of the light source 130 and the light input axis of the image collector 110 is 20-40°, for example, 20°, 30° or 40°. The light input axis of the image collector 110 is perpendicular to and intersects the central axis of the roller.
[0036] The composite material strip screening device 100 further includes a waste frame 140 , which is located below the cutter 120 and is used to receive defective electrodes 210 and collect waste materials in a centralized manner.
[0037] Image collector 110 includes a line scan camera, also known as a line array camera. This is an industrial camera specifically designed to continuously scan and capture one-dimensional image data. Unlike traditional area scan cameras, which capture a complete two-dimensional image in one go, a line scan camera captures only one line (i.e., a row of pixels) of the image at a time. Through relative motion of the object or the camera, this linear image data is combined to form a final two-dimensional image, improving image acquisition accuracy.
[0038] Of course, it is understandable that in order to realize the processing of image data to determine the location of defects, and thus accurately control the operation of the cutter 120 to remove the defective electrode 210, the thermal composite stacking machine also includes a controller, which is electrically connected to the image collector 110 and the cutter 120. Of course, how the controller determines whether there are defects based on the image data can directly adopt the control logic in the existing technology. For example, the image data is compared with a pre-set image. If there is a difference, it is judged that there are surface quality defects such as yellow labels, glue, breakage, scratches, and whether there are defects such as size deviations between the electrode length and width and the target battery cell, thereby determining the location of the defect. After the defect position is transmitted to the downstream side of the cutter 120, the cutter 120 is controlled to operate to remove the defective electrode 210.
[0039] The above-mentioned controller is usually a central processing unit (CPU), which can be configured with a corresponding operating system and control interface, etc. Specifically, it can be a single-chip microcomputer, DSP (Digital Signal Processing), ARM (Advanced RISC Machines, ARM processor) and other digital logic control units that can be used for automatic control. The control instructions can be loaded into the memory for storage and execution at any time. At the same time, it can have built-in CPU instruction and data memory, input and output units, power supply modules, digital simulation and other units. The specific settings can be made according to actual usage, and the embodiments of the present application are not limited to this.
[0040] The working principle of the embodiment of the present application is as follows:
[0041] The material strip 200 unwound from the material roll is continuously transmitted forward by the front-end driving structure. When it reaches the composite line scanning component, the light emitted by the light source 130 is irradiated on the material strip 200. The line scanning camera takes pictures to record the surface features of the material strip 200 on the roller surface, and transmits the pictures to the controller for analysis and identification. It detects whether there are surface quality defects such as yellow labels, glue, damage, scratches, etc. on the surface of the material strip 200, and whether there are dimensional deviations in the length and width of the electrode. The electrode that does not meet the requirements is digitally marked and the digital position is transmitted to the rear-end cutter 120 component position. The cutter 120 will cut the material strip 200 into single electrode pieces at the target position, and remove the defective electrode 210 and drop it into the waste frame 140. It will no longer participate in the subsequent battery cell production process and will not be compounded or stacked into a battery cell with other good electrode pieces 220, resulting in waste of production materials. At the same time, the good electrode 220 continues to be transported backward after being cut by the cutter 120, participating in the process of synthesizing the composite sheet, stacking the electrode into the battery cell, etc., completing the manufacturing of the entire battery cell, and effectively improving the quality rate of the battery cell production.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A composite material strip screening device, characterized in that: include: An image collector (110) is used to align the material strip (200) to collect image data, thereby detecting whether the material strip (200) has defects; A cutter (120) is located on the downstream side of the image collector (110) in the conveying direction of the material strip (200), and the cutter (120) is used to cut the material strip (200) according to the detection result of the image collector (110) to remove defective electrodes (210).
2. The composite material strip screening device according to claim 1, characterized in that: The composite material strip screening device further comprises a light source (130), wherein the light source (130) is used to be aligned with the material strip (200), the light source (130) and the image collector (110) are located on the same side of the material strip (200), and the light output axis of the light source (130) and the light input axis of the image collector (110) intersect.
3. The composite material strip screening device according to claim 2, characterized in that: The angle α formed by the light output axis of the light source (130) and the light input axis of the image collector (110) is 20 to 40 degrees.
4. The composite material strip screening device according to claim 3, characterized in that: The included angle α is 30°.
5. The composite material strip screening device according to claim 1, characterized in that: The composite material strip screening device further comprises a roller, wherein the roller and the image collector (110) are respectively located on the front and back sides of the material strip (200).
6. The composite material strip screening device according to claim 5, characterized in that: The incident light axis of the image collector (110) is perpendicular to and intersects with the central axis of the roller.
7. The composite material strip screening device according to claim 1, characterized in that: The composite material strip screening device further comprises a waste frame (140), wherein the waste frame (140) is located below the cutter (120) and is used for receiving defective electrodes (210).
8. The composite material strip screening device according to claim 1, characterized in that: The image collector (110) includes a line scan camera.
9. A thermal composite lamination machine, characterized in that: The composite material strip screening device comprises the composite material strip screening device according to any one of claims 1 to 8.
10. The thermal composite lamination machine according to claim 9, characterized in that: The thermal composite lamination machine further comprises a controller, which is electrically connected to the image collector (110) and the cutter (120).