Pole piece flattening mechanism and pole piece detection device
By introducing an electrode smoothing mechanism and smoothing plates into the electrode inspection process, the problem of batch defective dimensions caused by electrode mold deviation was solved, achieving precise closed-loop control of electrode size inspection, reducing material waste and improving cell production efficiency.
Patent Information
- Application Number
- CN202520387440.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-06
AI Technical Summary
In existing technologies, electrode sheets are prone to batch defects in size when corrected by molds, resulting in material waste and poor cutting.
An electrode smoothing mechanism was designed, including a fixing component and a smoothing plate. The smoothing plate is set above the conveyor belt to smooth the electrode end tabs. It works in conjunction with a size detection camera to improve detection accuracy and is precisely cut using a die.
This improved the accuracy of electrode size detection, reduced the number of defective electrodes, reduced material waste, and improved the cell manufacturing process capability.
Smart Images
Figure CN223834645U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrode detection technology, specifically to an electrode smoothing mechanism and an electrode detection device. Background Technology
[0002] After the positive and negative electrode coils are cut by a die, they form electrode sheets. The current electrode sheet size correction is achieved through die correction, which involves using a CCD camera (a digital camera with a charge-coupled device image sensor) to detect the electrode sheet size. The CCD camera then feeds the detection results back to the die for correction. However, there are detection errors during the CCD camera detection process. These errors are transmitted to the die, and after the die position is adjusted, a batch of electrode sheets with defective dimensions will be produced during cutting, resulting in a large number of scrapped electrode sheets and material waste. Utility Model Content
[0003] In view of this, the present invention provides an electrode smoothing mechanism and an electrode detection device to solve the problem that the electrode correcting process using a mold in the prior art easily results in batches of defective electrode sizes.
[0004] In a first aspect, this utility model provides an electrode smoothing mechanism, comprising:
[0005] A fixing component is adapted to be disposed above the inspection station of the conveyor belt; the fixing component includes a first fixing bracket and a second fixing bracket arranged sequentially at intervals along the conveying direction of the conveyor belt, the height of the first fixing bracket being higher than the height of the second fixing bracket; the conveyor belt is adapted to convey the electrode sheet sequentially through the bottom of the first fixing bracket and the second fixing bracket;
[0006] At least one smoothing plate, each smoothing plate having its two ends respectively disposed on the first fixed bracket and the second fixed bracket, the middle region of the smoothing plate hanging down and parallel to the conveying surface of the conveyor belt, in order to smooth the electrode sheet.
[0007] Beneficial Effects: In this electrode smoothing mechanism, each smoothing piece has its two ends respectively mounted on a first fixed bracket and a second fixed bracket. The two ends of the smoothing piece and its drooping middle area form a space for the electrode end tabs to enter and exit. The electrode end tabs enter the middle area of the smoothing piece through the first fixed bracket. The smoothing piece compacts and smooths the tab area and the electrode end area, achieving smoothing of both ends of the electrode. This facilitates better edge gripping by the dimensional inspection camera, improving its inspection accuracy. The dimensional inspection camera then feeds back the electrode size information to the cutting die, which adjusts the cutting dimensions accordingly. This ultimately achieves precise closed-loop control of electrode size inspection, effectively reducing the number of defective electrodes, minimizing material waste, and improving the cell manufacturing process capability. The height of the first fixed bracket is higher than that of the second fixed bracket, resulting in a larger tilt angle 'a' for the smoothing piece on the first fixed bracket side than the tilt angle 'b' on the second fixed bracket side. This is more conducive to the electrode entering the lower part of the smoothing piece from the side with the larger tilt angle. The smaller tilt angle of the smoothing piece on the second fixed bracket side facilitates better compaction of the electrode.
[0008] Secondly, this utility model also provides an electrode detection device, comprising:
[0009] Size inspection camera, suitable for placement above the inspection station on the conveyor belt;
[0010] The aforementioned electrode smoothing mechanism. Attached Figure Description
[0011] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0012] Figure 1 This is a first-angle schematic diagram of an electrode smoothing mechanism according to an embodiment of the present utility model;
[0013] Figure 2 This is a second-angle schematic diagram of an electrode smoothing mechanism according to an embodiment of the present utility model;
[0014] Figure 3 This is a schematic diagram showing the positions of a size detection camera, a coaxial light source, a backlight source, and a conveyor belt in an electrode sheet detection device according to an embodiment of this utility model.
[0015] Figure 4 This is a schematic diagram showing the tilt angle of the smoothing plate below the first fixed bracket and the second fixed bracket in an embodiment of the present utility model.
[0016] Explanation of reference numerals in the attached figures:
[0017] 1. Electrode smoothing mechanism; 11. Fixing assembly; 111. First fixing bracket; 112. Second fixing bracket; 113. Slider; 114. Fastener; 12. Smoothing plate; 13. First base; 14. Second base; 15. Heightening bracket; 2. Conveyor belt; 21. Porous adsorption area; 3. Size detection camera; 4. Backlight source; 5. Coaxial light source. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] The existing electrode size correction method involves mold correction, which uses a CCD camera to detect the electrode size and then feeds the results back to the die-cutting mold for correction. When the electrode tip warps or wrinkles, the CCD camera may misjudge the size of the electrode edge, leading to detection errors. These errors are then transmitted to the die-cutting mold, and after adjusting the mold position, a batch of electrodes with defective dimensions is produced, resulting in a large number of scrapped electrodes and material waste.
[0020] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.
[0021] According to an embodiment of the present invention, an electrode smoothing mechanism 1 is provided, including a fixing component 11 and at least one smoothing plate 12.
[0022] The fixing component 11 is adapted to be located above the inspection station of the conveyor belt 2. The fixing component 11 includes a first fixing bracket 111 and a second fixing bracket 112 arranged sequentially at intervals along the conveying direction of the conveyor belt 2. The height of the first fixing bracket 111 is higher than the height of the second fixing bracket 112. The conveyor belt 2 is adapted to convey the electrode sheets sequentially through the bottom of the first fixing bracket 111 and the second fixing bracket 112. The two ends of each smoothing piece 12 are respectively located on the first fixing bracket 111 and the second fixing bracket 112. The middle area of the smoothing piece 12 hangs down and is parallel to the conveying surface of the conveyor belt 2 to smooth the tabs at both ends of the electrode sheet when the electrode sheet passes through. In this electrode smoothing mechanism 1, each smoothing plate 12 has its two ends respectively mounted on the first fixed bracket 111 and the second fixed bracket 112. The two ends of the smoothing plate 12 and its drooping middle area form a space for the electrode end tab to enter and exit. The electrode end tab enters the middle area of the smoothing plate 12 through one side of the first fixed bracket 111. The smoothing plate 12 can compact and smooth the tab area and the electrode end area, thus smoothing the beginning and end of the electrode. This is beneficial for the size inspection camera 3 to better grasp the edge, which can improve the inspection accuracy of the size inspection camera 3. The size inspection camera 3 then feeds back the electrode size information to the cutting die. The cutting die makes size adjustments based on the size information, ultimately achieving precise closed-loop control of electrode size inspection. This can effectively reduce the number of defective electrodes, reduce material waste, and improve the cell manufacturing process capability. The height of the first fixed bracket 111 is higher than the height of the second fixed bracket 112, so that the tilt angle 'a' of the smoothing plate 12 on one side of the first fixed bracket 111 is greater than the tilt angle 'b' of the smoothing plate 12 on one side of the second fixed bracket 112. This is more conducive to the electrode sheet entering the area below the smoothing plate 12 from the side with the larger tilt angle. The tilt angle of the smoothing plate 12 on the side of the second fixed bracket 112 is smaller, which is conducive to better compacting the electrode sheet.
[0023] In this embodiment, the electrode includes a current collector and an active material layer. The active material layer is coated on the surface of the current collector, while the tab area is not coated with active material. If the electrode is a positive electrode, the current collector can be made of aluminum, and the active material layer can be made of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. If the electrode is a negative electrode, the current collector can be made of copper, and the active material layer can be made of carbon or silicon, etc.
[0024] In some embodiments, at least two smoothing plates 12 are provided, wherein at least one smoothing plate 12 is disposed at both ends on the first fixed bracket 111 and the second fixed bracket 112 in an adjustable manner along the length direction of the first fixed bracket 111. The turbine smoothing plates are used to compact the tabs at the end of the electrode sheet and the end region at the other end of the electrode sheet. The position of the smoothing plates 12 is adjustable, which facilitates the adjustment of the spacing between the turbine smoothing plates to adapt to the smoothing of electrodes of different lengths, and can effectively improve the adaptability of the electrode smoothing mechanism 1.
[0025] In some optional embodiments, two smoothing plates 12 are provided. The two smoothing plates 12 are positioned opposite each other and spaced apart at both ends of the first fixed bracket parallel to the width direction of the conveyor belt 2. When the electrode passes through, the two smoothing plates 12 are used to smooth the tab at one end of the electrode and the end area at the other end of the electrode, so as to simultaneously smooth the beginning and end of the electrode.
[0026] like Figure 1 and Figure 2 As shown, in some embodiments, the fixing component 11 further includes a slider 113, which is slidably disposed on the first fixing bracket 111 and the second fixing bracket 112. The two ends of the smoothing piece 12 are respectively disposed on the slider 113. The slider 113 slides to adjust the distance between the two smoothing pieces 12. The adjustment structure is simple and reliable.
[0027] In some embodiments, the positions of both smoothing plates 12 are adjustable. Four sliders 113 are provided, with each slider 113 positioned opposite to the first fixed bracket 111 and the second fixed bracket 112. The two ends of one smoothing plate 12 are respectively positioned on the sliders 113 of the two fixed brackets. The positions of both smoothing plates 12 are adjustable, and the spacing adjustment range is large, which can improve the adaptability of the electrode smoothing mechanism 1. Furthermore, the two smoothing plates can be positioned as centrally as possible, allowing the electrode to be placed in the middle region of the conveyor belt 2 in the width direction.
[0028] In some alternative embodiments, such as Figure 1 and Figure 2 As shown, the fixing assembly 11 also includes a fastener 114; the first fixing bracket 111 and the second fixing bracket 112 are provided with sliding holes, the slider 113 is slidably disposed in the sliding holes, and the smoothing piece 12 is disposed on the slider 113, the first fixing bracket 111 and the second fixing bracket 112 through the fastener 114. When it is necessary to adjust the position of the smoothing piece 12, loosen or remove the fastener 114, slide the slider 113, and after the slider 113 slides into place, tighten or pass the fastener 114 through the sliding hole, the slider 113 and the smoothing piece 12 to fix the slider 113 on the first fixing bracket 111 and the second fixing bracket 112.
[0029] Optionally, in this embodiment, the fastener 114 includes a bolt, and the slider 113 and the smoothing plate 12 are provided with bolt holes for the bolt to pass through. One end of the bolt passes through the slider hole and the bolt hole to position the slider 113 and the smoothing plate 12.
[0030] In some embodiments, the smoothing sheet 12 is made of a transparent material, so that it does not obstruct the size detection camera 3 from gripping the edge.
[0031] The width of the smoothing plate 12 is smaller than the width of the tab, which allows the edge of the tab to protrude from the smoothing plate 12, reducing the impact of the reflection of the smoothing plate 12 on the edge gripping of the size inspection camera 3, and improving the edge gripping accuracy of the size inspection camera 3.
[0032] In some embodiments, the smoothing sheet 12 includes a mela sheet.
[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the electrode smoothing mechanism 1 further includes a first base 13 and a second base 14. The first base 13 and the second base 14 are adapted to be disposed opposite each other at both ends of the conveyor belt 2 in the width direction. The two ends of the first fixed bracket 111 and / or the second fixed bracket 112 are adjustablely disposed on the first base 13 and the second base 14 along the conveying direction of the conveyor belt 2. The first base 13 and the second base 14 are fixed at both ends of the conveyor belt 2 in the width direction. The first base 13 and the second base 14 are used to support and fix the first fixed bracket 111 and the second fixed bracket 112, so that the two fixed brackets are suspended above the conveyor belt 2. The position of the first fixed bracket 111 and / or the second fixed bracket 112 along the conveying direction is adjustable, and the distance between the two fixed brackets can be adjusted as needed.
[0034] In some embodiments, such as Figure 1 As shown, the first fixed bracket 111, the second fixed bracket 112, the first base 13 and the second base 14 are all rectangular strips. The first base 13 and the second base 14 are provided with multiple mounting holes at intervals along their length, and the mounting positions of the two fixed brackets can be adjusted through the mounting holes.
[0035] like Figure 1 and Figure 2 As shown, in some embodiments, the electrode smoothing mechanism 1 further includes a raising bracket 15. The raising bracket 15 is adjustablely positioned on the first base 13 and the second base 14. A first fixed bracket 111 is positioned on the raising bracket 15. The raising bracket 15 is used to raise the height of the first fixed bracket 111, facilitating the electrode to enter under the turbine smoothing sheet. The raising bracket 15 is adjustablely positioned on the base, and by adjusting the position of the raising bracket 15, the distance between the two fixed brackets can be adjusted.
[0036] like Figure 1 and Figure 2As shown, in some embodiments, the heightening bracket 15 includes a horizontally arranged horizontal portion and a vertically arranged vertical portion on the horizontal portion. The horizontal portion has a horizontally extending oblong hole, which, in conjunction with the base mounting hole and fastener 114, adjusts the position of the heightening bracket 15. The vertical portion has a vertically extending oblong hole, and a first fixed bracket 111 is mounted on the heightening bracket 15 via fastener 114. The mounting height of the first fixed bracket 111 is adjusted via the vertical oblong hole.
[0037] According to an embodiment of the present invention, another aspect provides an electrode inspection device, including a size inspection camera 3 and the aforementioned electrode smoothing mechanism 1, wherein the size inspection camera 3 is adapted to be disposed above the inspection station of the conveyor belt 2.
[0038] In this electrode inspection device, the size inspection camera 3 is positioned above the inspection station to acquire the size parameters of the electrode. The tab at the end of the electrode enters the middle area of the smoothing sheet 12 through one side of the first fixed bracket 111. The smoothing sheet 12 compacts and smooths the tab area, achieving smoothing of the beginning and end of the electrode, which helps the size inspection camera 3 to better grasp the edges and improves the inspection accuracy of the size inspection camera 3. The size inspection camera 3 then feeds back the electrode size information to the cutting die, and the cutting die makes size adjustments based on the size information, ultimately achieving precise closed-loop control of electrode size inspection. This can effectively reduce the number of defective electrodes, reduce material waste, and improve the cell manufacturing process capability. The height of the first fixed bracket 111 is higher than the height of the second fixed bracket 112, so that the tilt angle of the smoothing plate 12 on one side of the first fixed bracket 111 is greater than the tilt angle of the smoothing plate 12 on one side of the second fixed bracket 112. This is more conducive to the electrode sheet entering the underside of the smoothing plate 12 from the side with the larger angle. The tilt angle of the smoothing plate 12 on the side of the second fixed bracket 112 is smaller, which is conducive to better compacting the electrode sheet.
[0039] In some embodiments, such as Figure 3 As shown, transparent areas are provided at both ends of the inspection station in the width direction. The transparent areas are suitable for carrying the electrode tabs, and a backlight source 4 is provided below the transparent areas. The electrode sheet is conveyed to the inspection station by the conveyor belt 2. The electrode tabs at the end of the electrode sheet are located in the transparent areas. The backlight source 4 shines upward from below the conveyor belt 2, making the outline of the electrode sheet end clearer, which is beneficial to improving the edge grasping accuracy of the size inspection camera 3.
[0040] like Figure 3 As shown, in some embodiments, the electrode detection device further includes a coaxial light source 5, which is located between the size detection camera 3 and the conveyor belt 2. The electrode is illuminated above by the coaxial light source 5, which can achieve clear imaging of the electrode under the size detection camera 3 and improve the detection accuracy of the size detection camera 3.
[0041] In some embodiments, the conveyor belt 2 is provided with a porous adsorption region 21, which adsorbs the electrode sheet so that the electrode sheet adheres to the conveyor belt 2. The length of the electrode sheet is L, and the width of the porous adsorption region 21 is W. The width of the porous adsorption zone 21 is greater than that of the porous adsorption zone 21 of the conventional conveyor belt 2, which can increase the contact area between the electrode and the conveyor belt 2, thereby reducing the phenomenon of electrode warping and wrinkling, and making it more conducive to the size detection camera 3 to accurately obtain the electrode size.
[0042] Optionally, in some embodiments, the size detection camera 3 includes a CCD camera.
[0043] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. An electrode smoothing mechanism, characterized in that, include: A fixing component (11) is disposed above the inspection station of the conveyor belt (2); the fixing component (11) includes a first fixing bracket (111) and a second fixing bracket (112) arranged sequentially at intervals along the conveying direction of the conveyor belt (2), the height of the first fixing bracket (111) being higher than the height of the second fixing bracket (112); the conveyor belt (2) is adapted to convey the electrode sheet sequentially through the bottom of the first fixing bracket (111) and the second fixing bracket (112); At least one smoothing piece (12) is provided at both ends on the first fixed bracket (111) and the second fixed bracket (112), respectively. The middle region of the smoothing piece (12) hangs down and is parallel to the conveying surface of the conveyor belt (2) to smooth the electrode sheet.
2. The electrode smoothing mechanism according to claim 1, characterized in that, At least two smoothing pads (12) are provided, wherein at least one smoothing pad (12) is positioned adjustablely on the first fixed bracket (111) and the second fixed bracket (112) along the length direction of the first fixed bracket (111).
3. The electrode smoothing mechanism according to claim 2, characterized in that, The fixing component (11) further includes a slider (113), which is slidably disposed on the first fixing bracket (111) and the second fixing bracket (112), and the two ends of the smoothing piece (12) are respectively disposed on the slider (113).
4. The electrode smoothing mechanism according to claim 3, characterized in that, The fixing component (11) further includes a fastener (114); the first fixing bracket (111) and the second fixing bracket (112) are provided with sliding holes, the slider (113) is slidably disposed in the sliding holes, and the smoothing piece (12) is disposed on the slider (113), the first fixing bracket (111) and the second fixing bracket (112) through the fastener (114).
5. The electrode smoothing mechanism according to any one of claims 1 to 4, characterized in that, It also includes a first base (13) and a second base (14), the first base (13) and the second base (14) being adapted to be disposed opposite each other at both ends of the conveyor belt (2) in the width direction, and the two ends of the first fixed bracket (111) and / or the second fixed bracket (112) being adjustablely disposed on the first base (13) and the second base (14) along the conveying direction of the conveyor belt (2).
6. The electrode smoothing mechanism according to claim 5, characterized in that, It also includes a heightening bracket (15), which is adjustablely positioned on the first base (13) and the second base (14), and the first fixed bracket (111) is positioned on the heightening bracket (15).
7. An electrode testing device, characterized in that, include: A size inspection camera (3) is suitable for placement above the inspection station of the conveyor belt (2); The electrode smoothing mechanism (1) according to any one of claims 1 to 6.
8. The electrode testing device according to claim 7, characterized in that, The smoothing sheet (12) is made of transparent material.
9. The electrode testing device according to claim 7 or 8, characterized in that, The testing station has transparent areas at both ends in the width direction, the transparent areas are suitable for carrying electrode tabs, and a backlight source (4) is provided below the transparent areas.
10. The electrode testing device according to claim 7 or 8, characterized in that, It also includes a coaxial light source (5), which is located between the size detection camera (3) and the conveyor belt (2).
11. The electrode testing device according to claim 7 or 8, characterized in that, The conveyor belt (2) is provided with a porous adsorption zone (21), the length of the electrode is L, and the width of the porous adsorption zone (21) is W. L≤W≤ L.