Efficient pole piece etching micro-slot equipment

Abstract

The utility model belongs to the field of laser processing technology, specifically relates to a kind of efficient pole piece etching microgroove equipment, equipment includes conveying mechanism, laser etching mechanism, gas side blowing mechanism, conveying mechanism is used to lateral conveying pole piece, laser etching mechanism is used to emit laser and etch microgroove on the width direction of the upper and lower sides of pole piece;Gas side blowing mechanism is used to the laser etching area of the upper and lower sides of pole piece side blowing oxygen gas.This design is in the process of laser etching by side blowing oxygen gas as auxiliary gas, not only can help microgroove ablation, speed up the efficiency of laser etching groove, to improve overall laser scanning speed, and side blowing oxygen gas can also blow cooling to pole piece, blow away the dust and debris remaining on the surface of pole piece, with Simple structure, high processing quality, low in cost, high efficiency and so on.

Description

Technical Field

[0001] This utility model belongs to the field of laser processing technology, specifically relating to a high-efficiency electrode etching microgroove equipment. Background Technology

[0002] Lithium-ion batteries possess advantages such as long cycle life, fast charging, high voltage, high specific energy, and good safety performance, and are widely used in automobiles, energy storage, and smart 3C products. Under current lithium-ion battery manufacturing processes, microgroove etching of the electrode surface coating can improve the electrode's absorption rate and storage capacity of the electrolyte, resulting in a more uniform electrolyte distribution within the lithium-ion battery. This, in turn, enhances the battery's capacity utilization and improves its rate performance and cycle performance.

[0003] In existing technologies, lasers are typically used to scribing lines on negative electrode sheets. However, wide electrode sheets require high processing efficiency. During dense scribing, even expensive high-speed galvanometers are insufficient to meet production demands. To meet processing efficiency requirements, the number of galvanometers and lasers needs to be increased. However, this also increases the number of optical systems, leading to a significant increase in the overall size and cost of the laser system. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a highly efficient electrode etching microgroove equipment that can improve the efficiency of laser electrode etching, significantly reduce equipment costs, and minimize equipment footprint.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A high-efficiency electrode etching microgroove apparatus, comprising:

[0007] A conveying mechanism for laterally conveying electrode sheets;

[0008] A laser etching mechanism is used to emit a laser to etch microgrooves along the width direction on the upper and lower sides of the electrode sheet;

[0009] A gas side-blowing mechanism is used to blow oxygen to the laser etching areas on the upper and lower sides of the electrode.

[0010] Preferably, the equipment further includes a flatness tester, which is used to test the flatness of the electrode sheet before laser etching.

[0011] Preferably, the equipment further includes a laser thickness gauge for measuring the thickness of the electrode.

[0012] Preferably, the laser etching mechanism includes a movable first laser mirror and a fixed second laser mirror, wherein the first laser mirror and the second laser mirror are symmetrically arranged on the upper and lower sides of the electrode.

[0013] Preferably, the laser etching mechanism further includes an XYZ three-axis linear slide, on which the first laser galvanometer and the second laser galvanometer are both mounted. The XYZ three-axis linear slide is used to drive the first laser galvanometer to move along the XYZ axes.

[0014] Preferably, the gas bypass mechanism includes a first air knife and a second air knife connected to an oxygen source. The first air knife and the second air knife are symmetrically arranged on the upper and lower sides of the electrode. The oxygen bypass direction of the first air knife and the second air knife is opposite to the conveying direction of the conveying mechanism.

[0015] Preferably, the conveying mechanism includes a base and an input roller, an output roller, and a flattening roller disposed on the base. The electrode sheet wound from the input roller passes through the flattening roller and then winds into the output roller. The laser-etched area of ​​the electrode sheet is located between the flattening roller and the output roller.

[0016] Preferably, the conveying mechanism further includes at least two first tension rollers located below the electrode, the two first tension rollers being disposed between the flattening roller and the output roller, and the laser etching area of ​​the electrode being located between the two first tension rollers.

[0017] Preferably, the conveying mechanism further includes at least two second tension rollers located above the electrode sheet, the two second tension rollers being disposed on both sides of the flattening roller for pressing the electrode sheet against the top of the flattening roller.

[0018] Preferably, the equipment further includes a PLC laser control cabinet, which is connected to the laser generator of the XYZ three-axis linear slide and the laser etching mechanism via signal connection.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. In the laser etching process, the present invention uses side-blown oxygen as an auxiliary gas, which not only helps the microgroove ablation and accelerates the efficiency of laser grooving, thereby improving the overall laser scanning speed, but also allows the side-blown oxygen to cool the electrode and blow away the dust and debris remaining on the electrode surface. This processing method has the advantages of simple structure, high processing quality, low cost and high efficiency.

[0021] 2. This utility model features a transverse electrode conveyor with a laser etching mechanism and a gas blowing mechanism on both the upper and lower sides of the electrode. Through the above-mentioned reasonable arrangement, grooves can be made on both sides of the electrode in a single conveying operation, eliminating the need for rework and resulting in high production efficiency.

[0022] 3. This utility model includes a flatness tester and a laser thickness gauge. The flatness tester detects the flatness of the electrode sheet before laser etching, and the laser thickness gauge measures the thickness of the electrode sheet. Based on the flatness test results, electrode sheets that do not meet the processing requirements are rejected. Based on the thickness measurement results, electrode sheets with defects such as thick edges, pinholes, and agglomeration are also rejected, thereby ensuring product quality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a side view of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of the PLC laser control cabinet in this utility model.

[0026] Figure 4 Comparison of the depth and length of microgrooves etched by laser with and without oxygen blowing.

[0027] In the diagram above, the components are: conveying mechanism 1, input roller 11, output roller 12, flattening roller 13, base 14, first tension roller 15, second tension roller 16, laser etching mechanism 2, first laser galvanometer 21, second laser galvanometer 22, XYZ three-axis linear slide 23, gas side blowing mechanism 3, first air knife 31, second air knife 32, electrode 4, microgroove 41, flatness detector 5, and PLC laser control cabinet 6. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in detail below. Preferred embodiments of this utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of this utility model, but they should not be construed as limiting the scope of protection of this utility model.

[0029] It should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., are based on the directional or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] Unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] See Figure 1 This embodiment provides a high-efficiency electrode etching microgroove equipment, including a conveying mechanism 1, a laser etching mechanism 2, and a gas side-blowing mechanism 3. The conveying mechanism 1 is used to convey the electrode 4 laterally, the laser etching mechanism 2 is used to emit a laser to etch microgrooves 41 on the upper and lower sides of the electrode 4 along the width direction, and the gas side-blowing mechanism 3 is used to blow oxygen to the laser etching area on the upper and lower sides of the electrode 4.

[0033] The working principle is as follows: The electrode sheet 4 to be laser-processed is placed on the conveyor mechanism 1. The electrode sheet 4 follows the conveyor mechanism 1 as it moves along. When the electrode sheet 4 reaches below the laser etching mechanism 2, the laser beam is focused and scanned on the electrode sheet 4, forming a single-line microgroove structure on its surface. During the laser etching process, oxygen is blown in as an auxiliary gas. Because oxygen has a combustion-supporting effect, it can help ablate the microgrooves, accelerating the efficiency of laser etching. Correspondingly, the laser scanning speed is increased, with an increase of approximately 30%, thus speeding up the production cycle. The oxygen blowing also cools the electrode sheet 4 and blows away dust and debris remaining on its surface. This processing method can improve laser etching efficiency without increasing the number of galvanometers and laser generators, which can greatly reduce equipment costs and floor space. It also has the advantages of simple structure, strong controllability, high processing quality, low cost, and high efficiency. The comparison results between oxygen blowing and no oxygen blowing are as follows. Figure 4 As shown, compared with the micro-groove 41 without side-blowing oxygen, the depth and length of the micro-groove 41 after side-blowing oxygen are significantly improved.

[0034] In another embodiment of this utility model, see Figure 1 The equipment also includes a flatness detector 5, which is used to detect the flatness of the electrode 4 before laser etching. Based on the flatness detection results, the electrode 4 that does not meet the processing requirements is rejected, ensuring that only the electrode 4 with a uniform and flat surface is laser-processed.

[0035] In another embodiment of this invention, the equipment also includes a laser thickness gauge (not shown in the figure) for measuring the thickness of the electrode 4. The laser thickness gauge allows for precise measurement of the electrode 4's thickness, enabling the removal of electrodes with defects such as thick edges, pinholes, and agglomerations based on the measurement results. It also facilitates data traceability and analysis in subsequent quality monitoring processes.

[0036] In another embodiment of this utility model, see Figure 2 The laser etching mechanism 2 includes a movable first laser galvanometer 21 and a fixed second laser galvanometer 22, which are symmetrically arranged on the upper and lower sides of the electrode 4. With one laser galvanometer on each side of the electrode 4, double-sided processing of the electrode 4 is achieved simultaneously, resulting in high working efficiency. For example, the emitted laser wavelength is 1064nm, the laser power is 300W, the focused spot size is 50μm, and the scanning speed is 10000mm / s. It should be noted that the laser wavelength, laser power, focused spot size, and scanning speed of the laser galvanometer can be selected according to actual needs; the above parameters are only preferred options, and this embodiment does not limit them.

[0037] In another embodiment of this utility model, see Figure 2 The laser etching mechanism 2 also includes an XYZ three-axis linear slide 23. A first laser galvanometer 21 is mounted on the XYZ three-axis linear slide 23. The XYZ three-axis linear slide 23 drives the first laser galvanometer 21 to move along the XYZ three axes to fine-tune its position. After the flatness of the electrode 4 is checked, a focused laser beam is scanned using the first laser galvanometer 21 and the second laser galvanometer 22 to form a single-line microgroove structure on the surface of the electrode 4. The spacing between adjacent microgrooves 41 is 1 mm. The width and depth of the microgrooves 41 are measured. The width of a single microgroove 41 is approximately 110 μm, and the depth is approximately 20 μm. It should be noted that the width and depth of the microgrooves 41 can be selected according to actual needs. The above parameters are only preferred ranges, and this embodiment does not limit them. After the microgroove processing is completed, a small amount of dust that has not been blown away by oxygen is cleaned with a brush.

[0038] In another embodiment of this utility model, see Figure 2 The gas bypass mechanism 3 includes a first air knife 31 and a second air knife 32 connected to an oxygen source. The first air knife 31 and the second air knife 32 are symmetrically arranged on the upper and lower sides of the electrode 4. The oxygen bypass direction of the first air knife 31 and the second air knife 32 is opposite to the conveying direction of the conveying mechanism 1, and the angle between the oxygen bypass direction and the electrode 4 is approximately 45 degrees. The width of the air curtain blown out by the air knife is not less than the width of the electrode 4.

[0039] In another embodiment of this utility model, see Figure 2 , Figure 3The conveying mechanism 1 includes a base 14 and an input roller 11, an output roller 12, and a flattening roller 13 that are rotatably mounted on the base 14. The input roller 11, output roller 12, and flattening roller 13 are all cylindrical structures. The input roller 11 and output roller 12 are connected to rotating drive components such as motors. The motors drive the input roller 11 and output roller 12 to rotate along their axial direction, thereby allowing the electrode sheet 4 to be transferred from the input roller 11 through the flattening roller 13 to the output roller 12. The first air knife 31, the second air knife 32, the flatness detector 5, the second laser galvanometer 22, and the laser thickness gauge are all mounted on the base 15. Specifically, the entire roll of electrode sheet 4 is placed on the input roller 11 and wound out from the top of the input roller 11. After the wound electrode sheet 4 passes through the flattening roller 13 and is flattened, it enters the laser etching area located between the flattening roller 13 and the output roller 12 for laser ablation. During the laser ablation process, oxygen is blown in tandem. The laser-ablated electrode sheet 4 is then wound back into the output roller 12.

[0040] In another embodiment of this utility model, see Figure 2 , Figure 3 The conveying mechanism 1 also includes at least two first tension rollers 15 located below the electrode 4. The two first tension rollers 15 are disposed between the flattening roller 13 and the output roller 12, and the laser-etched area of ​​the electrode 4 is located between the two first tension rollers 15. For example, there are three first tension rollers 15 arranged side by side, with the middle first tension roller 15 biased towards the output roller 12. The purpose is to support the laser-etched area of ​​the electrode 4 without affecting the ablation of the electrode surface by the laser beam.

[0041] In another embodiment of this utility model, see Figure 2 , Figure 3 The conveying mechanism 1 also includes at least two second tensioning rollers 16 located above the electrode 4. The two second tensioning rollers 16 are arranged side by side on both sides of the flattening roller 13 to press the electrode 4 against the top of the flattening roller 13, so that the flattening roller 13 flattens the electrode 4.

[0042] In another embodiment of this utility model, see Figure 1 The equipment also includes a PLC laser control cabinet 6, a base 15, and an XYZ three-axis linear slide 23, all of which are mounted on the top of the PLC laser control cabinet 6. The PLC control assembly inside the PLC laser control cabinet 6 is electrically connected to the XYZ three-axis linear slide 23, the laser etching mechanism 2, etc. The operator completes the electrode ablation process by pre-setting the high-speed scanning program of the galvanometer in the PLC control assembly.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A high-efficiency electrode etching microgroove equipment, characterized in that, include: Conveying mechanism (1) is used for transverse conveying of electrode sheets (4); The laser etching mechanism (2) is used to emit a laser to etch microgrooves (41) along the width direction on the upper and lower sides of the electrode (4). The gas side-blowing mechanism (3) is used to blow oxygen to the laser etching areas on the upper and lower sides of the electrode (4).

2. The high-efficiency electrode etching microgroove equipment according to claim 1, characterized in that, The equipment also includes a flatness tester (5), which is used to test the flatness of the electrode (4) before laser etching.

3. The high-efficiency electrode etching microgroove equipment according to claim 1 or 2, characterized in that, The equipment also includes a laser thickness gauge for measuring the thickness of the electrode (4).

4. The high-efficiency electrode etching microgroove equipment according to claim 1 or 2, characterized in that, The laser etching mechanism (2) includes a movable first laser galvanometer (21) and a fixed second laser galvanometer (22), which are symmetrically arranged on the upper and lower sides of the electrode (4).

5. The high-efficiency electrode etching microgroove equipment according to claim 4, characterized in that, The laser etching mechanism (2) further includes an XYZ three-axis linear slide (23), on which the first laser galvanometer (21) and the second laser galvanometer (22) are both mounted. The XYZ three-axis linear slide (23) is used to drive the first laser galvanometer (21) to move along the XYZ three axes.

6. The high-efficiency electrode etching microgroove equipment according to claim 1 or 2, characterized in that, The gas side-blowing mechanism (3) includes a first air knife (31) and a second air knife (32) connected to the oxygen source. The first air knife (31) and the second air knife (32) are symmetrically arranged on the upper and lower sides of the electrode (4). The oxygen side-blowing direction of the first air knife (31) and the second air knife (32) is opposite to the conveying direction of the conveying mechanism (1).

7. The high-efficiency electrode etching microgroove equipment according to claim 1 or 2, characterized in that, The conveying mechanism (1) includes a base (14) and an input roller (11), an output roller (12), and a flat roller (13) disposed on the base (14). The electrode (4) wound out from the input roller (11) passes through the flat roller (13) and then winds into the output roller (12). The laser etching area of ​​the electrode (4) is located between the flat roller (13) and the output roller (12).

8. The high-efficiency electrode etching microgroove equipment according to claim 7, characterized in that, The conveying mechanism (1) further includes at least two first tension rollers (15) located below the electrode (4), the two first tension rollers (15) being located between the flattening roller (13) and the output roller (12), and the laser etching area of ​​the electrode (4) being located between the two first tension rollers (15).

9. The high-efficiency electrode etching microgroove equipment according to claim 7, characterized in that, The conveying mechanism (1) further includes at least two second tension rollers (16) located above the electrode (4). The two second tension rollers (16) are located on both sides of the flat roller (13) for pressing the electrode (4) against the top of the flat roller (13).

10. The high-efficiency electrode etching microgroove equipment according to claim 5, characterized in that, The equipment also includes a PLC laser control cabinet (6), which is connected to the laser generator of the XYZ three-axis linear slide (23) and the laser etching mechanism (2).

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