Foreign body removal device

Abstract

A foreign matter removing apparatus according to an embodiment of the present application is for removing foreign matter on a surface of an electrode continuously conveyed in a conveying direction, and includes a blowing unit that blows air toward the surface of the electrode, a suction unit that sucks out the foreign matter separated from the surface of the electrode, and an extension unit that extends between the blowing unit and the suction unit, wherein the extension unit is formed with an adjustment unit that is concave in a direction away from the surface of the electrode.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0117897, filed with the Korean Intellectual Property Office on September 3, 2021, and Korean Patent Application No. 10-2022-0111454, filed with the Korean Intellectual Property Office on September 2, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to a foreign object removal device, and more particularly to a foreign object removal device for removing foreign objects from the electrode surface during the battery manufacturing process. Background Technology

[0004] With technological advancements and increasing demand for mobile devices, the need for batteries as an energy source is rapidly growing. In particular, rechargeable batteries, as a power source for electric bicycles, electric vehicles, hybrid vehicles, and other power-driven devices, as well as mobile devices such as mobile phones, digital cameras, laptops, and wearable devices, have received widespread attention.

[0005] Secondary batteries can be classified into cylindrical or prismatic batteries and pouch batteries based on the shape of their casings. In cylindrical or prismatic batteries, an electrode assembly with a structure in which the cathode and anode are stacked with a separator placed between them is built into a cylindrical or prismatic metal can. In pouch batteries, the electrode assembly is built into a pouch-shaped casing made of laminated aluminum sheets.

[0006] Furthermore, secondary batteries can be classified based on the structure of the electrode assembly, in which the cathode and anode are stacked with a separator placed between them. Typically, one might mention a jelly roll (winding) structure, in which long sheet-shaped cathodes and anodes are wound together with a separator placed between them; a stack (laminated) structure, in which multiple cathodes and anodes cut to predetermined unit sizes are stacked sequentially with a separator placed between them, and so on. In recent years, to address the problems associated with jelly roll and stacked electrode assemblies, a stacked / folded electrode assembly has been developed, which combines the characteristics of both.

[0007] Such electrode assemblies can typically be assembled or produced using semi-automated or automated production lines. For example, electrodes, diaphragms, and other components constituting an electrode assembly are transferred along guide members such as guide rails or rotating rollers to a device that performs processes such as cutting, bonding, laminating, and winding, and can be assembled or produced as an electrode assembly through the operation of such devices.

[0008] However, during the entire production process described above, foreign matter such as electrode powder or metal powder will be generated from the current collector. These foreign matter fall onto the surface of the electrode and, during the process of being conveyed by guide rails, rotating rollers, etc., or in processes such as cutting, bonding, laminating, and winding, will cause the voltage characteristics of the finished battery to deteriorate.

[0009] Figure 1 This is a cross-sectional view showing a conventional foreign object removal device.

[0010] See Figure 1 The foreign object removal device 10 includes an air blowing unit 12, which blows air onto the surface of the electrode E along the conveying direction p1; and a suction unit 14, which suctions foreign objects separated from the electrode surface, thereby removing foreign objects from the surface of the electrode E.

[0011] However, in the conventional foreign matter removal device 10, due to the Coanda effect, the air blown from the blowing unit 12 tends to concentrate on the lower surface of the extension unit 16 between the blowing unit 12 and the suction unit 14, rather than on the electrode E, which causes a reduction in foreign matter removal efficiency. Furthermore, increasing the flow rate / velocity to address these issues increases air consumption and generates noise. Summary of the Invention

[0012] [Technical Issues]

[0013] The present invention was designed to solve the above-mentioned problems. The purpose of the present invention is to provide a foreign matter removal device that improves the foreign matter removal efficiency and minimizes the product defect rate by concentrating the blown air on the electrode surface.

[0014] The purpose of this invention is not limited to the above-described purpose, and those skilled in the art should clearly understand from the following detailed description and drawings other purposes not described herein.

[0015] [Technical Solution]

[0016] According to an embodiment of the present invention, a foreign matter removal device is provided for removing foreign matter from the surface of an electrode that is continuously conveyed along a conveying direction. The foreign matter removal device includes: an air blowing unit for blowing air onto the surface of the electrode, a suction unit for suctioning foreign matter separated from the surface of the electrode, and an extension unit extending between the air blowing unit and the suction unit, wherein the extension unit is formed with an adjustment unit recessed in a direction away from the surface of the electrode.

[0017] The blowing unit and the suction unit form a slit at an angle to the transmission direction of the electrode. The air blown out from the blowing unit moves in the opposite direction to the transmission direction of the electrode, and the air drawn in by the suction unit can move in the same direction as the direction of the blown air.

[0018] The angle formed by the air blowing unit and the electrode's transmission direction can be approximately equal to the acute angle formed by the suction unit and the electrode's transmission direction. The air blown out by the air blowing unit forms an angle of 35 to 55 degrees with the electrode's transmission direction.

[0019] The air blowing unit is formed by a slit at an angle to the transmission direction of the electrode, and the width of the slit can be from 0.03 mm to 0.07 mm.

[0020] The air blowing unit is formed by a slit that forms an angle with the direction of electrode transmission. A protrusion that protrudes toward the air flow space is located at the end of the air blowing unit, and the flow space may refer to the space formed above the surface of the electrode.

[0021] The protrusion forms an angle with the transmission direction of the electrode, and the angle formed by the protrusion and the transmission direction of the electrode can correspond to the angle formed by the transmission direction of the air blowing unit and the electrode.

[0022] The protrusion length of the protrusion can be 2mm to 3mm.

[0023] The suction unit can suction foreign objects at an angle ranging from 35 degrees to 55 degrees.

[0024] The suction unit is formed by a slit that forms an angle with the transmission direction of the electrode, and the width of the slit can be from 1.0 mm to 3.0 mm.

[0025] The length of the extension unit can be 20mm-35mm.

[0026] The depth of the adjustment unit is 3mm to 5mm, and the depth of the adjustment unit can be calculated based on a surface of the extension unit above which no adjustment unit is formed. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view showing a conventional foreign object removal device;

[0028] Figure 2 This is a cross-sectional view of a foreign object removal device according to an embodiment of the present invention;

[0029] Figure 3 According to Figure 2 Experimental results on optimizing the protrusion of the foreign object removal device;

[0030] Figure 4 and Figure 5 It is based on Figure 2 Optimization experimental design and results of foreign object removal device;

[0031] Figures 6 to 9 It is an analysis Figure 4 and5 A graph showing the experimental results;

[0032] Figure 10 A comparison of experimental results between a conventional foreign matter removal device and a foreign matter removal device according to an embodiment of the present invention is shown; and

[0033] Figure 11 A comparison of the foreign matter removal rates of a conventional foreign matter removal device and a foreign matter removal device according to an embodiment of the present invention is shown. Detailed Implementation

[0034] In the following, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can readily implement them. The present invention can be modified in various different ways and is not limited to the embodiments described herein.

[0035] Parts irrelevant to the description will be omitted in order to clearly describe the invention, and similar reference numerals denote similar elements throughout the description.

[0036] Furthermore, for ease of description, the dimensions and thicknesses of each element are arbitrarily illustrated in the accompanying drawings, and the present invention is not necessarily limited to the dimensions and thicknesses shown in the drawings. In the figures, the thickness and area of ​​layers are enlarged. In the figures, for ease of description, the thickness and area of ​​some layers are enlarged.

[0037] Furthermore, it will be understood that when an element such as a layer, film, region, or plate is referred to as being "on" or "above" another element, it can be directly on the other element or there may be intermediate elements present. Conversely, when an element is referred to as being "directly on" another element, it means that there are no other intermediate elements present. Additionally, the term "on" or "above" refers to being arranged on or below the reference part, and does not necessarily mean being arranged at the upper end of the reference part in the opposite direction of gravity. Similarly, the description of being located "on" or "above" another component will also be understood with reference to the above.

[0038] Furthermore, throughout the description, when a component is referred to as "including" or "contains" another component, it means that the component may further include other components without excluding other components, unless otherwise stated.

[0039] Furthermore, throughout the description, when referred to as a "plane," it means the target portion viewed from above, and when referred to as a "cross section," it means the target portion viewed from the side of a vertically cut cross section.

[0040] A foreign object removal device according to an embodiment of the present invention will now be described.

[0041] The foreign object removal device 100 described below is primarily intended for removing foreign objects from the surface of electrode E during the production process of secondary batteries. However, this is not necessarily the case. Obviously, in addition to the production process of secondary batteries, this foreign object removal device can also be used in various processes that require the removal of foreign objects from surfaces.

[0042] Figure 2 This is a cross-sectional view of a foreign object removal device according to an embodiment of the present invention.

[0043] See Figure 2 According to an embodiment of the invention, the foreign object removal device 100 has two main body parts 110 that are symmetrical about an electrode E passing through the center of the foreign object removal device 100.

[0044] Meanwhile, in describing this embodiment, the main body component 110 located at the upper part of electrode E will be mainly described below, but it will be clarified in advance that these descriptions can also be applied to the main body component 110 located at the lower part of electrode E.

[0045] The foreign object removal device 100 includes a blowing unit 120 that blows air toward the surface of the electrode E along the conveying direction p1 between two main components 110, a suction unit 140 that sucks up foreign objects separated from the electrode surface, and an extension unit 160 that extends between the blowing unit 120 and the suction unit 140, wherein the extension unit 160 is formed with an adjustment unit 180 having a concave shape.

[0046] Electrode E may be the object of the foreign matter removal device 100. Electrode E may be provided in the form of a rectangular sheet, wherein an electrode slurry is applied to the current collector. Current collectors that may be used herein include stainless steel, aluminum, copper, nickel, titanium, calcined carbon, or the like, and may be provided in various forms, such as membranes, sheets, foils, meshes, porous bodies, foams, and nonwoven fabrics. Furthermore, the electrode slurry may typically include, but is not limited to, electrode active materials, conductive materials, binders, and solvents.

[0047] Electrode E can be moved in one direction by the rotational force of the rollers that wind up or unwind the electrode. Electrode E can be moved continuously by the rotational force of the rollers that wind up or unwind the electrode. The rollers allow electrode E to move between the two main components 110 within the foreign matter removal device 100.

[0048] The blowing unit 120 can be configured to blow air to remove foreign matter adhering to the surface of the electrode E. The blowing unit 120 can be positioned further away from the position where the electrode E flows into the foreign matter removal device 100, so that the blowing unit 120 faces the electrode E later than the suction unit 140, depending on the conveying direction p1 of the electrode E in the foreign matter removal device 100.

[0049] The air blowing unit 120 can be formed into a slit shape in the main body component 110. The flow rate and velocity of the air ejected from the air blowing unit 120 can be determined based on the slit width of the air blowing unit 120. The slit width of the air blowing unit 120 according to this embodiment can be smaller than the slit width of a normal air blowing unit 120. The slit width of the air blowing unit 120 can be less than 0.5 mm. Furthermore, the slit width of the air blowing unit 120 can be 0.1 mm or less, 0.07 mm or less, or 0.01 mm or more, or 0.03 mm or more. Specifically, the tolerance range can be 0.05 mm or less than 0.005 mm. This is achieved by making the slit width smaller than that in the prior art, thereby maximizing the flow velocity at the same flow rate.

[0050] The blowing angle α1 of the air discharged from the blowing unit 120 can form an angle with the conveying direction p1 of the electrode E. The blowing angle α1 can be determined according to the slit shape of the blowing unit 120. Here, the blowing angle α1 can refer to the acute angle in the angle formed by the conveying direction p1 of the electrode E and the air jet path.

[0051] Specifically, the air blowing unit 120 can be formed along an oblique line towards the surface of the electrode E inside the main body component 110. The air blowing unit 120 can be formed along an oblique line so that the air flowing out of the air blowing unit 120 moves in the opposite direction to the electrode's transport direction p1. Since the pressure exerted on the surface of the electrode E by the air ejected from the air blowing unit 120 can vary depending on the air blowing angle α1 of the air blowing unit 120, the air blowing angle α1 of the air blowing unit 120 may need to be appropriately designed. A detailed description of the air blowing angle α1 will be provided later with experimental data.

[0052] A protrusion 122 may be formed at the end of the air blowing unit 120. The protrusion 122 may refer to the portion extending from the air blowing unit 120 and protruding into the airflow space. Here, "flow space" refers to the space formed above the surface of the electrode E, and may also refer to the space formed between the foreign matter removal device 100 and the surface of the electrode E. Here, the "flow space" can be made larger by adjusting the unit 180, wherein "flow space" may refer to the space between the surface of the recessed adjusting unit 180 and the surface of the electrode E.

[0053] The protrusion 122 can be located at the end of the airflow direction discharged from the blowing unit 120, thereby adjusting the airflow direction. The airflow direction can depend on the angle of the protrusion 122. Here, the angle of the protrusion 122 can correspond to the blowing angle α1 of the blowing unit 120. However, the blowing angle α1 can also be designed to be smaller or larger, depending on the designer's intention. Furthermore, the airflow direction can vary depending on the size of the protrusion 122. Depending on the degree to which the protrusion 122 protrudes into the airflow space, the effect of the protrusion 122 on the air can be different.

[0054] The suction unit 140 can be configured to suck up and remove foreign matter separated from the surface of the electrode E by the blowing unit 120. Depending on the conveying direction p1 in the foreign matter removal device 100, the suction unit 140 can be positioned near the location where the electrode E flows through a portion of the foreign matter removal device 100, so that it encounters the electrode E before the blowing unit 120.

[0055] The suction unit 140 can be formed into a slit shape within the main body component 110. The flow rate and velocity of the air drawn in by the suction unit 140 can be determined based on the slit width of the suction unit 140. Functionally, it is preferable that the suction unit 140 has a larger slit width than the blowing unit 120. The slit width of the suction unit 140 can be 1.0-3.0 mm, specifically, it can be 2.0 mm within an error range of 0.2 mm or less.

[0056] The suction unit 140 can draw in air at an angle that forms an angle with the conveying direction p1 of the electrode E. Specifically, the suction unit 140 can form an oblique line from the surface of the electrode E into the interior of the main body 110. The suction unit 140 can form an oblique line so that the drawn-in air points from front to back relative to the conveying direction p1 of the electrode. The blowing angle of the suction unit 140 must be appropriately designed. For example, the spray angle of the suction unit 140 can be 35 to 55 degrees, which means forming an acute angle with the conveying direction p1 of the electrode E.

[0057] Meanwhile, in the blowing unit 120 and the suction unit 140, the ends of the blowing unit 120 and the suction unit 140 can be positioned facing each other. This allows the suction unit 140 to effectively collect the air ejected from the blowing unit 120. Here, "end" can refer to the portion of the blowing unit 120 and the suction unit 140 that is closest to the electrode E.

[0058] The extension unit 160 may refer to the portion extending from the blowing unit 120 to the suction unit 140. Air blown out from the blowing unit 120 can flow within the space between the extension unit 160 and the electrode E, and can then be drawn in by the suction unit 140.

[0059] Since the length w1 of the extension unit 160 determines the airflow space, it may affect the foreign object removal efficiency. The length w1 of the extension unit 160 can be set differently depending on the flow rate and velocity of the air discharged from the blowing unit 120, the suction force of the suction unit 140, etc. Here, the length w1 of the extension unit 160 refers to the length between the end of the blowing unit 120 and the suction unit 140, and when a protrusion 122 is formed at the end of the blowing unit 120, the length w1 of the extension unit 160 can refer to the length from the end of the protrusion 122 to the suction unit 140. In addition, the length w1 of the extension unit 160 can be calculated based on a straight line parallel to the conveying direction p1. The length w1 of the extension unit 160 used to improve the foreign object removal effect will be explained in detail below with experimental data.

[0060] The regulating unit 180 can be a component that regulates the airflow ejected from the blowing unit 120. The regulating unit 180 can be formed within the extension unit 160. The regulating unit 180 may also be referred to as an "airflow regulating unit," etc. The regulating unit 180 can be used to concentrate the air blown from the blowing unit 120 onto the surface of the electrode E. The regulating unit 180 can be used to minimize the Coanda effect.

[0061] The adjustment unit 180 may have a recessed shape in a direction away from the surface of electrode E. The adjustment unit 180 may be a portion removed from the extension unit 160 to expand the airflow space. The adjustment unit 180 allows for the formation of a space between the blowing unit 120 and the suction unit 140 for airflow onto the surface of electrode E. The adjustment unit 180 can be formed to expand the airflow space.

[0062] The degree of recess in the adjustment unit 180 can be represented by the maximum value of the depth or height of the adjustment unit 180 calculated based on a surface of the extension unit 160 before the adjustment unit 180 is formed. The depth d1 of the adjustment unit 180 can be set differently depending on the length w1 of the extension unit 160, the flow rate and velocity of the air discharged from the blowing unit 120, the suction force of the suction unit 140, etc. The depth d1 of the adjustment unit 180 will be described in detail below using experimental data to improve the removal effect of foreign objects.

[0063] The experimental design and results of optimizing the foreign matter removal device 100 according to an embodiment of the present invention will be described below.

[0064] Figure 3 According to Figure 2 Experimental results on optimizing the protrusion of the foreign object removal device.

[0065] See Figure 3The blowing unit 120 is provided in the form of a slit in the main body 110, wherein the effect of the protrusion 122 of the blowing unit 120 can vary depending on the shape of the corner 162 of the extension unit 160.

[0066] Figure 3 (a) Case 1 may be where the adjustment unit 180 is not formed in the foreign object removal device 100. See also Figure 3 (a) The air discharged from the blowing unit 120 exhibits the fastest flow rate around the extension unit 160 and a low flow rate around the electrode E. When the regulating unit 180 is not formed in the foreign object removal device 100, it is difficult to form a large flow rate / velocity of gas around the electrode E, thereby reducing the foreign object removal efficiency.

[0067] Figure 3 (b) Case 2 can be a situation where the adjustment unit 180 is formed in the foreign object removal device 100, and the corner 162 and the protrusion 122 are symmetrically shaped. That is, this can be a situation where the protrusion 122 does not protrude into the airflow space. This can be referred to as the case where the protrusion 122 is not formed. See also Figure 3 (b) It was confirmed that the air velocity discharged from the blowing unit 120 near the extension unit 160 was slightly lower than that of the air supply unit 120. Figure 3 (a) is the case, but it cannot improve the flow rate around electrode E.

[0068] Figure 3 (c) Case 3 may involve forming an adjustment unit 180 in the foreign object removal device 100 and removing a portion of the end of the corner 162, causing a portion of the protrusion 122 to protrude into the airflow space. See also Figure 3 (c) shows the phenomenon that the air discharged from the blowing unit 120 flows out to the left, so there is no effect of increasing the flow rate around the electrode (E).

[0069] Figure 3 (d) Case 4 can be a case where an adjustment unit 180 is formed in the foreign object removal device 100, and the end of the corner portion 162 is removed according to the concave shape of the adjustment unit 180, so that the protrusion 122 protrudes into the airflow space. See also Figure 3 (d) It can be determined that the air discharged from the blowing unit 120 is concentrated in a lower direction, such that the flow velocity around the electrode (E) is higher than the flow velocity around the extension unit 160 or the adjustment unit 180. That is, since the size of the protrusion 122 is large enough, it appears that the air blown from the blowing unit 120 is concentrated around the electrode E.

[0070] This is a reference. Figure 3As a result, depending on the shape of the adjustment unit 180, the outermost corner 162 of the extension unit 160 can preferably be removed. By removing the corner 162 of the extension unit 160, the protrusion 122 can be positioned in a state protruding into the flow space, thereby allowing the protrusion 122 to participate in the airflow direction. Furthermore, it may be desirable for the protrusion 122 to be sufficiently large.

[0071] Figure 4 and Figure 5 It is based on Figure 2 The experimental design and results of optimizing the foreign matter removal device. Figure 4 and Figure 5 In this context, WSS is short for wall shear stress, which refers to the stress generated on a corresponding surface. Left outflow refers to the phenomenon where air flows out in the opposite direction rather than in the designed direction.

[0072] See Figure 4 and Figure 5 A three-factor, three-level design of experimental design (DOE) was conducted to derive the optimal conditions for the foreign object removal device 100, and these conditions were confirmed by CFD experiments on nine conditions. The basic experimental conditions, experimental factors, and levels are shown in the table below. During the above experiments, the electrode movement speed was 110 m / min, forming... Figure 3 (d) The protrusion 122. Also, it should be noted in advance in the following table and description that blowing is related to the blowing unit 120 and suction is related to the suction unit 140.

[0073] [Table 1]

[0074]

[0075] [Table 2]

[0076]

[0077] Figure 6-9 Yes Figure 4 and 5 Analytical graph of experimental results.

[0078] See Figure 6-9 The optimal conditions for the foreign object removal device 100 are derived from the table below, and confirmed by the DOE analysis results obtained from the analysis of the experimental results.

[0079] Table 3-6 is a table obtained by Taguchi analysis of four variables: electrode surface velocity, WSS, left outflow, and suction velocity. Table 7 is a table that selects the main factors based on the occupancy rate values ​​shown in Table 3-6, based on the analysis of the above tables and figures.

[0080] also, Figures 6 to 9The main effect graph for each variable is shown.

[0081] [Table 3]

[0082]

[0083] [Table 4]

[0084]

[0085] [Table 5]

[0086]

[0087] [Table 6]

[0088]

[0089] [Table 7]

[0090]

[0091]

[0092] Referring to Tables 3 to 7, the blowing angle α1 of the blowing unit 120 has a significant impact on the electrode surface velocity and WSS, and the length w1 of the extension unit 160 has a significant impact on all WSS, left outflow, and suction velocities. Furthermore, it was found that the depth d1 of the adjustment unit 180 has no significant relationship with the left air outflow.

[0093] See Figure 6 and Figure 8 When the blowing angle (a1) of the blowing unit 120 and the depth (d1) of the adjusting unit 180 deviate from a certain level, outflow occurs, and the flow velocity on the electrode surface tends to decrease. (See also...) Figure 8 At this point, the presence or absence of left outflow can be confirmed, and it may be necessary to prioritize excluding outflow data values ​​from the optimal conditions. Also, see... Figure 7 When the depth d1 of the adjustment unit 180 is around 5mm, the WSS value appears to fluctuate significantly, presumably because the separation distance h1 between the main component 110 and the electrode E is designed to be 5mm. Furthermore, as... Figure 9 As shown, when the blowing angle (a1) of the blowing unit 120 is 45 degrees and within an error range of 0.5 degrees, the depth (d1) value of the adjusting unit 180 is 3 to 5 mm, more specifically 5 mm, within an error range of 0.2 mm, and the length (w1) value of the extending unit 160 is 20 to 35 mm, more specifically 20 mm, within an error range of 0.2 mm. This is found to be advantageous for suction consumption.

[0094] Table 8, which will be described below, presents the optimal conditions obtained by combining the above results. Specifically, based on each characteristic, the blowing angle α1 of the blowing unit 120, the length w1 of the extension unit 160, and the depth d1 of the adjustment unit 180 are all based on... Figures 6 to 9 The values ​​shown are used as examples. Further, the optimal condition values ​​are selected based on the results of each major factor in Table 7.

[0095] [Table 8]

[0096]

[0097] Figure 10 A comparison of experimental results between a conventional foreign object removal device and a foreign object removal device according to an embodiment of the present invention is shown.

[0098] For a clearer comparison, Figure 10 The CFD simulation results of the foreign object removal device 100 of this embodiment were compared with those of the conventional foreign object removal device 10 without the control component 180. Here, the foreign object removal device 100 of this embodiment embodies the optimal conditions shown in Table 8 obtained through the above experiments.

[0099] exist Figure 10 (a) and Figure 10 (b) In this experiment, the slit widths of the blowing unit 12 and the blowing unit 120 are different, but the airflow velocity from them is the same (changing the airflow velocity). The slit angle of the suction unit 160 is 45 degrees, and the suction velocity is the minimum flow rate that does not produce airflow. In addition, during the experiment, the electrode moving speed is 110 m / min, and the separation distance h1 between the main component 110 and the electrode E is 5 mm. Other experimental conditions are shown in Table 9 below.

[0100] [Table 9]

[0101]

[0102] See Figure 10 You can confirm the application. Figure 10 (b) In the optimal conditions of the foreign object removal device 100 of this embodiment, with Figure 10 (a) Compared to the conventional foreign matter removal device 100, the flow rate around the surface of electrode E is increased by 800%. From these results, it can be confirmed that the foreign matter removal device 100 of this embodiment can remove foreign matter attached to the surface of electrode E more effectively than conventional devices.

[0103] Figure 11 A comparison of the foreign object removal rates of a conventional foreign object removal device and a foreign object removal device according to an embodiment of the present invention is shown.

[0104] For a clearer comparison, Figure 11 The results of the foreign object removal device 100 of this embodiment together with the conventional foreign object removal device 10 are shown. Here, the optimal conditions obtained from the above experiments in Table 8 are reflected in the foreign object removal device 100 of this embodiment.

[0105] In this experiment, the suction flow rate was the minimum flow rate when no air flowed out, and the flow rate of the blowing unit 120 was 77 LPM. Furthermore, the separation distance h1 between the main body component 110 and the electrode E was 5 mm. The evaluation conditions and procedures for this experiment are shown in Table 10 below.

[0106] [Table 10]

[0107]

[0108]

[0109] See Figure 11 It can be confirmed that in the foreign object removal device 100 of this embodiment, under optimal application conditions, the foreign object removal rate is increased by approximately 5000% compared to the conventional foreign object removal device 100. For example... Figure 10 The results show that this may be because an adjustment unit 180 is formed in the foreign object removal device 100, and the values ​​of each component are appropriately adjusted so that the air blown out from the air blowing unit 120 collides fully with the surface of the electrode E, thereby separating the foreign object.

[0110] The above description merely illustrates the technical concept of the present invention, and those skilled in the art will understand that various modifications and variations can be made without departing from the basic characteristics of the present invention. Accordingly, the embodiments of the present invention described above can be performed individually or in combination with each other.

[0111] The embodiments disclosed herein are provided to explain, rather than limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments. Therefore, the scope of protection of the invention should be interpreted by the following claims, and all technical concepts within their equivalents should be interpreted as being included within the scope of the invention.

[0112] [Explanation of reference numerals in the attached figures]

[0113] 100: Foreign Object Removal Device

[0114] 110: Main components

[0115] 120: Air blowing unit

[0116] 122: Protrusion

[0117] 140: Suction Unit

[0118] 160: Extension Unit

[0119] 180: Adjustment unit

[0120] [Industrial Applicability]

[0121] According to the embodiments, the foreign matter removal device of the present invention can concentrate the blown air on the surface of the electrode, thereby improving the foreign matter removal rate, reducing the product defect rate caused by foreign matter on the electrode surface, and enhancing the uniformity or reliability of the product.

[0122] The effects of the present invention are not limited to those described above. Those skilled in the art can clearly understand other additional effects not described above from the detailed description and the accompanying drawings.

Claims

1. A foreign matter removal device for removing foreign matter from the surface of an electrode continuously conveyed along a conveying direction, the foreign matter removal device comprising: The air blowing unit blows air toward the surface of the electrode. The suction unit removes foreign matter separated from the surface of the electrode, and An extension unit extends between the blowing unit and the suction unit. The extension unit includes an adjustment unit that is recessed in a direction away from the surface of the electrode. The air blowing unit is formed by a slit at an angle to the conveying direction of the electrode. A protrusion extending toward the airflow space is located at the end of the air blowing unit, and The flow space refers to the space formed above the surface of the electrode, and The protrusion is at an angle to the conveying direction of the electrode, and the angle between the protrusion and the conveying direction of the electrode corresponds to the angle between the air blowing unit and the conveying direction of the electrode. The angle between the air blowing unit and the transmission direction of the electrode is 45°. The extension unit has a length of 20mm, and The depth of the adjustment unit is 5 mm, and the depth of the adjustment unit is calculated based on the surface of the extension unit that does not form the adjustment unit.

2. The foreign object removal device according to claim 1, wherein: The suction unit is formed by a slit that forms an angle with the conveying direction of the electrode. The air blown out from the blowing unit moves in the opposite direction to the transmission direction of the electrode, and The air drawn in through the suction unit moves in the same direction as the air blown out.

3. The foreign object removal device according to claim 2, wherein: The angle between the blowing unit and the electrode in the transmission direction and the angle between the suction unit and the electrode in the transmission direction have essentially equal acute angle values.

4. The foreign object removal device according to claim 1, wherein: The width of the slit is 0.03 mm to 0.07 mm.

5. The foreign object removal device according to claim 1, wherein: The protrusion length of the protrusion is 2mm-3mm.

6. The foreign object removal device according to claim 1, wherein: The suction unit draws in foreign objects at an angle of 35 degrees to 55 degrees.

7. The foreign object removal device according to claim 1, wherein: The suction unit is formed by a slit that forms an angle with the conveying direction of the electrode, and The width of the slit is 1.0 mm to 3.0 mm.

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