Cleaning device for thin copper films of secondary batteries

Abstract

The present invention provides a cleaning device for copper films of secondary batteries, comprising: a main body unit having an opening formed at the lower end thereof; a cleaning air supply unit which is provided at the upper end of the main body unit, and supplies cleaning air supplied from the outside, to the inner space of the main body unit; a nozzle unit which sprays the supplied cleaning air through the opening of the main body unit; a vacuum suction unit installed on one side of the main body unit so as to be disposed on one side of the opening, and having a slit-shaped vacuum suction hole formed in the lower end thereof to provide vacuum suction force provided from the outside; and a screen unit which is slidably disposed at the lower end of the other side of the main body unit and varies an opening area of the opening as the screen unit slides.

Description

Cleaning device for copper thin film of secondary battery

[0001] The present invention relates to a cleaning device for a copper thin film of a secondary battery, and more specifically, to a cleaning device for manufacturing a secondary battery that effectively removes fine foreign substances or residual contaminants attached to the surface of a copper thin film during a secondary battery manufacturing process, while preventing structural damage to the film itself and simultaneously preventing the removed foreign substances from scattering to the outside, thereby improving process stability and product quality.

[0002] Recently, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has rapidly increased, and the development of electric vehicles, energy storage batteries, robots, and satellites has been in full swing, research on high-performance secondary batteries capable of repeated charging and discharging is actively being conducted.

[0003] There are three main reasons for cleaning the copper film of these secondary batteries.

[0004] First, contaminants present on the surface of the copper foil can reduce adhesion between the active material and the copper foil, deteriorating electrical conductivity and potentially degrading secondary battery performance. Removing these contaminants through cleaning enhances the adhesion between the active material and the copper foil, improving electrical conductivity and potentially enhancing the capacity, output, and lifespan of the secondary battery.

[0005] Second, contaminants on the copper film surface can interfere with the electrochemical reactions occurring at the electrode. Removing these contaminants through cleaning increases the electrode surface area, facilitating electron movement and promoting electrochemical reactions. This, in turn, increases the charge / discharge efficiency of secondary batteries and reduces energy loss.

[0006] Third, dust and residue generated during the secondary battery manufacturing process can negatively impact product quality. Cleaning the copper foil removes these dust and residues, improving the product's appearance and enhancing the stability of the manufacturing process.

[0007] However, care must be taken to avoid damaging the copper foil during the cleaning process. Strong air pressure or inappropriate cleaning solutions can tear or puncture the copper foil.

[0008] After cleaning, the film must be completely dried. Residual moisture can cause electrode corrosion, resulting in reduced secondary battery performance.

[0009] In the past, when cleaning the copper film of a secondary battery using air, there was a possibility that the copper film would be damaged.

[0010] In other words, strong air pressure can mechanically impact the copper film, potentially tearing or creating holes. Furthermore, fine dust contained in the air can wear away the copper film's surface, damaging it. Furthermore, the static electricity generated during the air blowing process can induce static electricity on the copper film's surface, reducing its adhesion to the active material.

[0011] Accordingly, while cleaning foreign substances formed on a copper foil film of a secondary battery, the film is moved and cleaning air is sprayed on the cleaning area of ​​the film moving to the cleaning section to remove foreign substances while preventing the foreign substances being removed from flying out, and development of a technology that can effectively prevent damage to the copper foil film during cleaning is required.

[0012] The present invention has been devised to solve the above-described problems, and the purpose of the present invention is as follows.

[0013] The purpose of the present invention is to provide a cleaning device for manufacturing a secondary battery that effectively removes fine foreign substances or residual contaminants attached to the surface of a copper foil film during the manufacturing process of a secondary battery, while preventing structural damage to the film itself and simultaneously preventing the removed foreign substances from flying outward, thereby improving process stability and product quality.

[0014] Specifically, the cleaning device includes a nozzle section for spraying cleaning air, a vacuum suction unit section, and a screen section for controlling the opening area of ​​the opening, thereby implementing a precise cleaning process that is linked to the movement of the film, thereby maximizing the cleaning efficiency of the copper thin film, and simultaneously removing contaminants and improving overall performance such as conductivity, adhesion, and appearance quality.

[0015] In addition, by adopting a concave bottom structure with a curvature and a sliding variable structure, we aim to secure non-contact stability with the film and realize an equipment design that can flexibly respond to various process conditions.

[0016] The purpose of the present invention is not limited to the above-mentioned purposes, and other unmentioned purposes and advantages of the present invention can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the purposes and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0017] To achieve the above objectives, the present invention provides a cleaning device for a copper thin film of a secondary battery.

[0018] The present invention provides a cleaning device for a copper thin film of a secondary battery.

[0019] The cleaning device for the copper thin film of the secondary battery includes a main body portion which is disposed on a path along which the copper thin film of the secondary battery moves, has an internal space formed therein, and has an opening formed at a lower end thereof; a cleaning air supply portion which is provided at an upper end of the main body portion and supplies cleaning air supplied from the outside to the internal space of the main body portion; a nozzle portion which is installed at a lower end of the cleaning air supply portion of the main body portion and sprays the supplied cleaning air into the opening of the main body portion; a vacuum suction unit portion which is installed at one side of the main body portion so as to be positioned at one side of the opening and has a slit-shaped vacuum suction hole formed at a lower end thereof to provide a vacuum suction force provided from the outside; and a screen portion which is slidably disposed at a lower end of the other side of the main body portion and changes an open area of ​​the opening as it slides.

[0020] The lower surface of the nozzle portion, the lower surface of the vacuum suction unit portion, and the lower surface of the screen portion form a concave surface with a certain curvature along the upward direction based on the path along which the copper foil of the secondary battery moves.

[0021] The above vacuum suction hole is formed along the path along which the copper thin film of the secondary battery moves.

[0022] Here, at the bottom of the nozzle section,

[0023] Two rows of injection holes are formed at equal intervals along a direction perpendicular to the path along which the copper foil of the secondary battery moves.

[0024] It is preferable that the supplied cleaning air be sprayed downward through the spray holes.

[0025] And, the vacuum suction unit part,

[0026] It comprises a first vacuum suction block and a second vacuum suction block coupled to the first vacuum suction block.

[0027] A concave surface is formed at the bottom of the first and second vacuum suction blocks.

[0028] The above first vacuum suction block is provided with a vacuum supply pipe that receives vacuum from the outside, and discharge pipes that suck up foreign substances formed on the upper surface of the copper thin film of the secondary battery through the vacuum suction hole and discharge them to the outside.

[0029] A first cut groove is formed on the lower side of the first vacuum suction block.

[0030] A cut second groove is formed on the lower side of the second vacuum suction block facing the first groove.

[0031] The above vacuum suction hole is formed by the first and second grooves when the first vacuum suction block and the second vacuum suction block are coupled to each other.

[0032] And, at the bottom of the second vacuum suction block, a joining groove is formed to which one end of the nozzle portion is joined.

[0033] Additionally, a movement guide groove having a set movement length for guiding the movement of the screen portion is formed on the lower sides of both sides of the main body portion with the opening as the boundary.

[0034] In addition, the screen portion comprises a screen plate formed on a plate to form a concave groove, a pair of moving plates formed on both sides of the screen plate and moved along the moving guide groove, and a pair of contact plates bent at the ends of the pair of moving plates and contacted with the lower sides of both sides of the main body portion.

[0035] A sliding hole having a certain length is formed in each of the above pair of contact plates.

[0036] Positioning holes are formed at intervals on the lower sides on both sides of the main body to which movement control members that are hung on each of the sliding holes are selectively fastened.

[0037] In addition, the lower part of the nozzle part,

[0038] It is in contact with the upper surface of the above screen plate so that it can slide.

[0039]

[0040] According to the present invention, through the means for solving the above problem, fine foreign substances or contaminants attached to the surface of a copper thin film during the manufacturing process of a secondary battery can be effectively removed, thereby preventing a decrease in adhesion with the electrode active material and stably maintaining electrical performance. In particular, since the nozzle unit for spraying cleaning air and the vacuum suction unit unit for sucking up foreign substances work together and simultaneously, foreign substances are immediately recovered without being scattered to the outside, and the cleanliness of the cleaning process can be maintained.

[0041] Additionally, the nozzle section, the vacuum suction unit section, and the lower portion of the screen section that controls the opening area are all formed as concave surfaces that curve along the path of the secondary battery copper foil film, thereby preventing direct contact with the film and minimizing mechanical damage. Accordingly, problems such as tearing, wear, and hole formation due to high-pressure air injection can be prevented, thereby ensuring the structural stability of the copper foil.

[0042] Furthermore, the screen structure, which allows for precise sliding adjustment of the aperture's open area, allows for a wide range of film widths and process conditions, increasing the device's usability and enhancing process efficiency. Furthermore, the vacuum suction unit's detachable block structure facilitates maintenance and component replacement, improving the operability and durability of the entire system.

[0043] In this way, the present invention can improve the electrical characteristics, reliability, lifespan, etc. of a secondary battery by providing a device capable of safely and effectively cleaning a copper thin film of a secondary battery, and can also greatly contribute to stabilizing the quality of the manufacturing process and improving productivity.

[0044] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0045] Figure 1 is a perspective view showing a cleaning device for a copper thin film of a secondary battery of the present invention.

[0046] Figure 2 is a bottom perspective view showing a cleaning device for a copper thin film of a secondary battery of the present invention.

[0047] Figure 3 is a perspective view showing a nozzle section according to the present invention.

[0048] Fig. 4 is a bottom perspective view showing a nozzle section according to the present invention.

[0049] Figure 5 is an exploded perspective view showing a nozzle section according to the present invention.

[0050] Figure 6 is a cutaway perspective view showing the nozzle portion positioned inside the main body.

[0051] Figure 7 is a bottom perspective view showing the configuration of a vacuum suction unit according to the present invention.

[0052] Figure 8 is a bottom perspective view showing a state in which a screen additional body according to the present invention is placed at the bottom.

[0053] Figure 9 is a perspective view showing a screen portion according to the present invention.

[0054] Fig. 10 is a bottom perspective view showing a screen portion according to the present invention.

[0055] FIG. 11 is a cutaway perspective view showing a structure in which cleaning air is sprayed through an opening in the main body to clean the film while the copper foil film moves along a moving path in the lower part of the main body according to the present invention, and at the same time, foreign substances in the area where the copper foil film is formed are vacuum-sucked and discharged.

[0056] Figure 12 is an enlarged view of A in Figure 11.

[0057] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that a person having ordinary skill in the art to which the present invention pertains can easily implement the present invention.

[0058] The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0059] In order to clearly explain the present invention, parts that are not related to the description are omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0060] Hereinafter, the phrase “any component is provided or arranged on the “upper (or lower)” of the description or “upper (or lower)” of the description means that any component is provided or arranged in contact with the upper surface (or lower surface) of the description.

[0061] Additionally, it is not limited to not including any other configuration between the above description and any configuration provided or arranged on (or under) the description.

[0062] The following describes a cleaning device for a copper thin film of a secondary battery of the present invention with reference to the attached drawings.

[0063] Fig. 1 is a perspective view showing a cleaning device for a copper thin film of a secondary battery of the present invention. Fig. 2 is a bottom perspective view showing a cleaning device for a copper thin film of a secondary battery of the present invention.

[0064] Referring to FIGS. 1 and 2, the cleaning device for a copper thin film of a secondary battery of the present invention comprises: a main body (100) which is arranged on a path along which a copper thin film of a secondary battery moves, has an internal space formed therein, and has an opening (110) formed at a lower end; a cleaning air supply unit (200) which is provided at an upper end of the main body (100) and supplies cleaning air supplied from the outside to the internal space of the main body (100); a nozzle unit (300) which is installed in the main body (100) to be positioned below the cleaning air supply unit (200) and sprays the supplied cleaning air into the opening (110) of the main body (100); a vacuum suction unit unit (400) which is installed at one side of the main body (100) to be positioned at one side of the opening (110) and has a slit-shaped vacuum suction hole (401) formed at a lower end to provide a vacuum suction force provided from the outside; It includes a screen part (500) that is slidably positioned at the lower end of the other side of the main body part (100) and changes the open area of ​​the opening (110) as it slides.

[0065] The lower surface of the nozzle portion (300), the lower surface of the vacuum suction unit portion (400), and the lower surface of the screen portion (500) form a concave surface with a certain curvature along the upward direction based on the path along which the copper foil of the secondary battery moves.

[0066] The above vacuum suction hole (401) is formed along the path along which the copper thin film of the secondary battery moves.

[0067] The cleaning device for a copper thin film of a secondary battery of the present invention is a high-functionality cleaning module for removing foreign substances present on the surface of a copper thin film continuously transported during a secondary battery manufacturing process, and provides a structure that enables high-efficiency, non-contact, clean cleaning through organic interaction between each component.

[0068] First, the main body (100) is the main structure where the cleaning process takes place, and by forming an internal space and having an opening (110) at the bottom, cleaning air is directly sprayed along the path along which the film moves, providing a flow path through which foreign substances can be removed downward. The cleaning air supply unit (200) mounted on the upper part of the main body transfers compressed air drawn in from the outside to the internal space, and this air is then converted into cleaning air through the nozzle unit (300) and sprayed downward.

[0069] The nozzle unit (300) is fixedly installed within the main body and has a spray hole at the bottom to precisely spray cleaning air toward the surface of a copper foil film for secondary batteries. At this time, the lower surface of the nozzle unit is designed to have a concave curved shape to minimize interference with the film's movement path while ensuring a uniform spray area. This structure prevents damage to the film due to mechanical impact of high-pressure air and enables precise control of the cleaning range.

[0070] Foreign substances removed by the cleaning air are immediately sucked through the vacuum suction unit (400) located on one side of the opening (110). At the bottom of the vacuum suction unit, slit-shaped vacuum suction holes (401) are arranged continuously along the longitudinal direction, and foreign substances removed from the film surface through these holes are removed cleanly without flying out. In particular, the bottom of the vacuum suction unit is also formed as a concave surface with a curve to maximize suction efficiency without coming into close contact with the film.

[0071] The screen section (500) is installed in a sliding manner at the lower end of the other side of the opening (110), and operates with a structure that allows the user to precisely adjust the open area as needed. This screen section can flexibly respond to the width of the film to be cleaned or the cleaning intensity adjustment requirement, and prevents unnecessary damage in advance by preventing excessive cleaning air from being sprayed to a specific area. The lower end of the screen section is also designed as a concave surface similar to the curvature of the film, which simultaneously serves to prevent external leakage from the cleaning area while ensuring stable movement of the film.

[0072] Overall, the device of the present invention features an optimized structure that simultaneously enables precise injection of cleaning air, rapid suction and removal of foreign substances, and prevention of film damage during the cleaning process. Furthermore, it can be reliably integrated into automated processes linked to the continuous movement of copper foil. Consequently, it can improve the quality of secondary battery electrode manufacturing and contribute to increased yield and reliability.

[0073]

[0074] The configuration of the nozzle unit (300) according to the present invention will be described in detail.

[0075] Fig. 3 is a perspective view showing a nozzle unit according to the present invention. Fig. 4 is a bottom perspective view showing a nozzle unit according to the present invention. Fig. 5 is an exploded perspective view showing a nozzle unit according to the present invention. Fig. 6 is a cutaway perspective view showing a nozzle unit arranged inside the main body.

[0076] As shown in FIGS. 1 and 2, the nozzle unit (300) according to the present invention is placed in the internal space of the main body (100).

[0077] Referring to FIGS. 3 to 5, the nozzle portion (300) includes a nozzle body (310) having a certain length. Both sides of the nozzle body (310) form a slope in which the width gradually narrows downward.

[0078] The above nozzle body (310) is formed with a hole (310a) extending vertically. The hole has a certain length along the longitudinal direction of the nozzle body (310).

[0079] Referring to Fig. 6, the nozzle body (310) has a pair of unit nozzle bodies (311) that are coupled to face each other. A cut groove is formed on the inner surface of each of the pair of unit nozzle bodies (311).

[0080] When the above pair of unit nozzle bodies (311) are combined, the respective cut grooves are arranged to face each other, and the cut grooves form the holes (310a) that expose the upper and lower portions of the nozzle body (310).

[0081] And, a spraying member (320) is installed inside the nozzle body (310).

[0082] The above-mentioned injection member (320) has a lower body (321) in the shape of a square bar, and an upper body (322) whose width gradually narrows in multiple steps at the upper end of the lower body (321) and whose upper end is formed in a pointed shape.

[0083] On both sides of the lower body (321), injection holes (320a) are formed at equal intervals along the longitudinal direction of the lower body (321) and along the vertical direction. The injection holes (320a) are formed in a groove shape with a certain depth toward the inside of the lower body (321).

[0084] The above-mentioned injection member (320) is installed inside the nozzle body (310) so as to be arranged along the central axis of the pair of unit nozzle bodies (311).

[0085] Both sides of the lower body (321) can be in close contact with the lower inner surface of a pair of unit nozzle bodies (311).

[0086] And the upper body (322) is placed in the hole (310a) of the nozzle body (310) and is exposed to the upper part of the nozzle body (310).

[0087] Here, at the lower end of the nozzle unit (300), the aforementioned injection holes (320a) are formed in two rows at equal intervals along a direction perpendicular to the path along which the copper foil of the secondary battery moves, and the supplied cleaning air is sprayed downward through the injection holes (320a). The sprayed cleaning air can be sprayed onto the upper surface of the copper foil film moving below it through the opening (110) of the main body unit (100).

[0088] The nozzle unit (300) according to the present invention performs a cleaning air injection function to effectively remove fine particles, residual dust, contaminants, etc. attached to the film surface during the process of continuously transporting the copper thin film of a secondary battery. This nozzle unit has a precise geometric structure to remove surface foreign substances by directly injecting high-pressure air, while ensuring spray uniformity and preventing film damage.

[0089] The nozzle part is largely composed of a nozzle body (310) and a spray member (320) installed therein. The nozzle body (310) has a block-shaped structure with a certain length, and forms inclined surfaces on both sides that gradually narrow toward the bottom, thereby inducing the air flowing downward in the internal space to naturally converge. This straightens the air flow, ensuring that the spray air does not spread out but has a concentrated flow, thereby contributing to minimizing the loss of cleaning power.

[0090] The nozzle body (310) is structured such that a pair of left and right unit nozzle bodies (311) are combined, and a half-cut groove is formed on the inner surface of each. When combined, these grooves correspond to each other to form a vertical through hole (310a), and this hole is arranged so that the upper part of the spray member (320) protrudes outside the nozzle body, and is connected to an external supply pipe to be used as a passage through which cleaning air can be supplied.

[0091] The spray member (320) is composed of an upper body (322) and a lower body (321), of which the lower body is formed in a square bar shape and inserted into the inside of the nozzle body (310). On the left and right sides of the lower body, spray holes (320a) are arranged in two rows at regular intervals in a direction perpendicular to the direction of movement of the film. These spray holes are not cylindrical holes, but have a structure in the form of grooves dug into the interior, so that when air is sprayed, the air velocity is stably distributed along the flow, and it is designed to be sprayed evenly over the entire film surface.

[0092] The cleaning air sprayed through these spray holes (320a) is sprayed downward in a perpendicular direction toward the upper surface of the film, as the lower end of the nozzle portion is aligned with the opening (110) of the main body portion (100). In this process, the high-pressure air exerts a direct physical impact on the contaminants adsorbed on the surface to remove them, and at the same time, the spray structure in the direction perpendicular to the film movement direction minimizes the surface pressure acting on the film, thereby significantly reducing the possibility of physical damage.

[0093] In addition, the lower portion of the nozzle section (300) forms a concave surface that curves along the film's transport path, enabling precise spraying of air from a very close location without physical contact with the film. This concave surface structure induces a constant interval to be maintained along the film's curved surface, allowing the sprayed air to reach the entire film surface evenly and maximize cleaning efficiency by increasing the concentration of the air flow.

[0094] In addition, the spray member is precisely positioned on the central axis inside the nozzle body, so as to provide a balanced spray flow on the left and right based on the spray holes (320a) on both sides, and to ensure the reliability of the cleaning process by preventing the cleaning air from being biased.

[0095] The nozzle unit (300) according to the present invention performs the function of effectively removing foreign substances attached to the film surface by precisely spraying high-pressure cleaning air during the copper thin film cleaning process of a secondary battery. In particular, the lower portion of the nozzle unit is formed with two rows of spray holes, allowing the cleaning air to be sprayed evenly across the entire surface of the film, thereby significantly improving cleaning efficiency.

[0096] Additionally, the nozzle body forms a gradually tapering slope along the bottom, and the entire bottom is designed with a concave curved structure. This structure stably converges the airflow and aligns the spray direction, increasing the concentration and straightness of the airflow. This structural design suppresses turbulence and contributes to maximizing cleaning power without energy loss.

[0097] Since the nozzle unit of the present invention is configured to vertically spray cleaning air without contacting the film, the surface pressure caused by the spray is minimized, thereby preventing physical damage such as tearing or wrinkling of the surface of the thin and sensitive copper foil film.

[0098] Additionally, the nozzle section is formed by combining a pair of unit nozzle bodies, each of which is designed to house a spray element, facilitating easy disassembly and assembly. This modular structure facilitates easy replacement and cleaning of individual components during maintenance, thereby enhancing the device's operational efficiency and durability.

[0099] Furthermore, cleaning characteristics can be precisely controlled through the spacing and depth of the injection holes under various pressure and flow conditions, enabling flexible process adaptation to production environments and film specifications. These characteristics serve as a crucial technological foundation for process optimization and high-quality product production in secondary battery manufacturing.

[0100] In this way, the nozzle unit of the present invention is a high-functionality module that comprehensively realizes, beyond a simple air injection function, improved cleaning quality, film protection, structural stability, and ease of maintenance, and can significantly contribute to improving the manufacturing efficiency and product reliability of secondary batteries.

[0101]

[0102] Figure 7 is a bottom perspective view showing the configuration of a vacuum suction unit according to the present invention.

[0103] Referring to FIG. 7, the vacuum suction unit (400) according to the present invention includes a first vacuum suction block (410) and a second vacuum suction block (420) coupled to the first vacuum suction block (410).

[0104] A concave surface is formed at the bottom of the first and second vacuum suction blocks (410, 420).

[0105] The first vacuum suction block (410) is provided with a vacuum supply pipe (411) that receives vacuum from the outside, and discharge pipes (412) that suck up foreign substances formed on the upper surface of the copper foil of the secondary battery through the vacuum suction hole (401) and discharge them to the outside.

[0106] A cut first groove (410a) is formed on the lower side of the first vacuum suction block (410).

[0107] A cut second groove (420a) is formed on one side of the lower portion of the second vacuum suction block (420) facing the first groove (410a).

[0108] The above vacuum suction hole (401) is formed by the first and second grooves (410a, 420a) when the first vacuum suction block (410) and the second vacuum suction block (420) are coupled to each other.

[0109] And, at the bottom of the second vacuum suction block (420), a joining groove (420b) is formed to which one end of the nozzle part (300) is joined.

[0110] The vacuum suction unit (400) according to the present invention is a key component for quickly and stably removing foreign substances dropped by cleaning air in a copper thin film cleaning process of a secondary battery, and provides a functional structure that can simultaneously maintain the cleanliness of the film surface and prevent external scattering.

[0111] The vacuum suction unit section is composed of a first vacuum suction block (410) and a second vacuum suction block (420), and these two blocks are combined to form an integrated structure. Each of these has a concave lower curved surface formed at the bottom corresponding to the transport curvature of the film, thereby inducing the suction flow to closely follow the film surface without making direct contact with the film, thereby maximizing the suction efficiency of foreign substances.

[0112] The first vacuum suction block (410) forms a negative pressure through a vacuum supply pipe (411) connected to an external vacuum source, and based on this, discharges foreign substances introduced into the vacuum suction hole (401) to the outside through a plurality of discharge pipes (412). This structure creates clean process conditions advantageous for continuous removal of foreign substances and prevention of contamination accumulation within the device.

[0113] At the bottom of the vacuum suction block, a first groove (410a) and a second groove (420a) are formed, each half-cut, and when the two blocks are combined, the grooves are connected in a straight line to form a continuous slit-shaped vacuum suction hole (401). This slit-shaped suction hole is arranged longitudinally along the film transport direction, thereby implementing a linear suction function capable of continuously sucking up foreign substances simultaneously with the movement of the film.

[0114] In addition, a coupling groove (420b) designed to allow one end of the nozzle section (300) to be stably fastened is formed at the bottom of the second vacuum suction block (420), thereby allowing the cleaning air injection section and the vacuum suction section to be structurally closely linked. This coupling structure enables the integration of processes in which cleaning and suction are performed simultaneously or sequentially, thereby significantly improving process efficiency and device consistency.

[0115] The vacuum suction unit according to the present invention is structurally precisely designed to exhibit various significant functions and effects in the copper thin film cleaning process of a secondary battery.

[0116] First, the linearly formed suction structure through the slit-shaped vacuum suction hole (401) provides a uniform negative pressure across the entire width of the film, thereby enabling the precise removal of foreign substances removed by the cleaning air. This configuration maintains a clean surface condition without residue after cleaning, significantly improving the quality stability of the film.

[0117] Second, because foreign substances are sucked and discharged directly through the vacuum suction unit rather than flying outside the process, a clean environment is maintained and contamination within the process is prevented. This is a particularly important factor in secondary battery manufacturing lines, which require cleanroom-level cleanliness management.

[0118] Third, the lower portion of the vacuum suction unit is shaped into a concave curve, preventing direct contact with the film while ensuring suction adheres closely to the film surface. This ensures stable removal of foreign substances without applying unnecessary pressure to the film, and effectively prevents physical damage, such as tearing or wrinkling, to the sensitive copper film.

[0119] Fourth, the vacuum suction unit of the present invention is assembled separately into first and second vacuum suction blocks, making maintenance extremely easy. The separate structure of each block facilitates inspection, cleaning, and parts replacement of the internal suction path, contributing to increased equipment operating efficiency and extended overall lifespan.

[0120] Finally, the bottom of the second vacuum suction block features a connecting groove that can be connected to the nozzle unit, providing a structural foundation for integrating the cleaning and suction devices into a single unit. This ensures precise assembly between the nozzle unit and the vacuum unit, maintaining precise alignment. This enhances process reliability and improves the installation and maintenance efficiency of the entire device.

[0121] In this way, the vacuum suction unit of the present invention realizes various technical advantages such as improved cleaning efficiency, maintenance of process cleanliness, and securing equipment reliability, and provides a very useful configuration for a high-quality secondary battery manufacturing process.

[0122] Therefore, the vacuum suction unit of the present invention is a key module for implementing a high-performance cleaning process, and provides a technological foundation for realizing high-quality manufacturing of copper thin film for secondary batteries and dramatically improving productivity and process reliability.

[0123]

[0124] Fig. 8 is a bottom perspective view showing a state in which a screen part according to the present invention is arranged at the bottom of the main body. Fig. 9 is a bottom perspective view showing a screen part according to the present invention. Fig. 10 is a bottom perspective view showing a screen part according to the present invention.

[0125] Referring to FIGS. 8 to 10, a movement guide groove (120) having a set movement length for guiding the movement of the screen portion (500) is formed on the lower sides of both sides of the main body portion (100) with the opening (110) of the main body portion (100) as the boundary.

[0126] In addition, the screen portion (500) comprises a screen plate (510) formed on a plate to form a concave groove, a pair of moving plates (520) formed on both sides of the screen plate (510) and moved along the moving guide groove (120), and a pair of contact plates (530) bent at the ends of the pair of moving plates (520) and contacted with the lower sides of both sides of the main body portion (100).

[0127] A sliding hole (531) having a certain length is formed in each of the above pair of contact plates (530).

[0128] On the lower sides of both sides of the main body (100), positioning holes (130) are formed at intervals to selectively fasten movement control members (not shown) that are hung on each of the sliding holes (531).

[0129] In addition, a portion of the lower portion of the nozzle section (300) is in contact with the upper surface of the sliding screen plate (500) so that it can slip.

[0130] The screen unit (500) according to the present invention serves as an important control means for localizing the spray range of cleaning air by precisely controlling the open area of ​​the cleaning area during the process of cleaning the copper thin film of a secondary battery, thereby improving the precision and stability of the cleaning effect.

[0131] The screen section (500) is configured around a screen plate (510) having a concave curved structure, and the screen plate is positioned below the lower opening (110) of the main body section (100) and has a variable structure that can selectively cover or expose the lower open area where cleaning air is sprayed. The screen plate (510) is formed in a concave shape similar to the curvature of the film, thereby stably inducing the spray flow of cleaning air while minimizing interference with the copper thin film.

[0132] A moving plate (520) is formed extending on each side of the screen plate, and the moving plate can slide along a moving guide groove (120) formed on both sides of the lower part of the main body. Accordingly, the user can adjust the exposure area of ​​the opening (110) in various ways by sliding the screen section, and can perform precise area cleaning according to the size, location, and degree of contamination of the film to be cleaned.

[0133] At the end of the moving plate, a contact plate (530) is formed that is bent and extends outwardly toward the lower end of the main body, and a sliding hole (531) of a predetermined length is provided in this contact plate. A movement control member inserted from the outside is caught and fastened to this sliding hole, and at this time, by selecting a fastening position in a plurality of positioning holes (130) formed in advance on both sides of the main body, the final position of the screen part can be fixed. This structure stably controls the movement limit of the screen part and prevents positional errors in repetitive processes by allowing the user to quickly and reliably fix it to a desired position.

[0134] In addition, the upper surface of the screen plate is configured to be in close contact with a portion of the lower part of the nozzle unit (300), which is a structure in which the screen plate slides while slidingly contacting the lower part of the nozzle unit, thereby reducing mutual frictional resistance and enabling smooth movement. This stably maintains the alignment between the nozzle unit and the screen unit, and contributes to preventing the cleaning air sprayed from the nozzle unit from leaking through the gaps in the screen unit or from being distorted in its flow.

[0135] The screen part (500) according to the present invention is a precision control function component for increasing the efficiency and stability of the cleaning process, and exhibits various functions and effects through its structural characteristics.

[0136] First, the screen section is designed to slide, allowing the user to adjust the cleaning aperture area in real time as needed. This allows for flexible process operations, such as performing localized cleaning on specific areas based on the position or width of the copper foil, or selecting full-scale cleaning across the entire area. This flexibility in cleaning range provides the advantage of supporting diverse product specifications.

[0137] Additionally, the screen can limit the spray range of cleaning air by shielding unnecessary cleaning areas. This reduces unnecessary waste of cleaning energy and maximizes cleaning efficiency by focusing energy only on areas requiring cleaning. This also contributes to optimizing equipment energy consumption.

[0138] The screen plate itself is designed with a concave curve, preventing contact with the copper foil while simultaneously suppressing film shaking or lifting through its curved shape. This structure prevents damage or wrinkling of the film during cleaning, ensuring both the stability of the cleaning process and film protection.

[0139] Furthermore, the screen's moving plate and contact plate are precisely designed with movement guide grooves, sliding holes, and positioning holes, allowing users to accurately guide and secure the screen, even during repetitive processes. This enhances operator convenience and process precision. Furthermore, it facilitates easy removal and reassembly during maintenance, further enhancing equipment management efficiency.

[0140] Furthermore, the upper surface of the screen plate is configured to be in close contact with the lower portion of the nozzle section, ensuring stable alignment with the nozzle section even as the screen section slides. This prevents disruption of the cleaning air injection path, ensuring consistent cleaning quality without air leakage or pressure loss.

[0141] In conclusion, the screen serves as a key device element that enables a high-quality cleaning process for copper thin films for secondary batteries by realizing complex functions such as precise control of the cleaning aperture area, energy concentration, film protection, and maintenance of structural integrity.

[0142] Fig. 11 is a cutaway perspective view showing a structure in which cleaning air is sprayed through an opening in the main body portion to clean the film while the copper foil film moves along a moving path in the lower portion of the main body portion according to the present invention, and at the same time, foreign substances in the area where the copper foil film is formed are vacuum-sucked and discharged. Fig. 12 is an enlarged view of A in Fig. 11.

[0143] Referring to FIGS. 11 and 12, a cleaning device for a copper foil film of a secondary battery according to the present invention performs high-precision cleaning through a series of processes in which a copper foil film (F) is continuously transported along the upper surface of a moving guide member (C) that is positioned at the lower portion of an opening (110) of a main body (100) and forms an upwardly convex moving path, while moving along the lower portion of the main body (100), cleaning air is sprayed, and at the same time, foreign substances are vacuum-sucked and discharged to the outside. Here, the film (F) can be moved at a constant speed by driving a separate rotating device (not shown).

[0144] First, the copper foil film (F) moves along a curved transport path along the convex upper surface of the moving guide block, and this path is designed to maximize the cleaning effect while preventing interference with the main components of the main body part (100) located above. At this time, the upper surface of the film moves while maintaining a constant gap with the concave curved surface formed at the lower end of the nozzle part (300), the vacuum suction unit part (400), and the screen part (500). This curvature-based design secures a uniform gap between the cleaning air and the film, thereby preventing dispersion loss of the spray air and enhancing the concentrated spraying effect.

[0145] The copper foil cleaning device for secondary batteries according to the present invention precisely sprays cleaning air along a moving film (F) and simultaneously effectively sucks and removes foreign substances, thereby implementing a cleaning process with high cleanliness and high stability. The operation of this device is carried out according to the following sequence and principles.

[0146] Explains the cleaning sequence and action.

[0147] First, in the cleaning air supply stage, compressed air supplied from the outside is introduced into the interior of the main body (100) through the cleaning air supply unit (200). This introduced air is then transferred into the interior of the nozzle unit (300) and is injected downward through the injection member (320) arranged therein.

[0148] At this time, cleaning air is precisely and uniformly sprayed through two rows of spray holes (320a) arranged at regular intervals on both sides of the nozzle body (310), and this air acts in a vertical direction on the upper surface of the copper thin film (F) moving along the curvature. As a result, various types of dust, residual particles, contaminants, etc. attached to the surface of the film (F) are physically removed, and cleaning is performed.

[0149] Second, in the foreign substance suction step, the contaminant particles separated by the cleaning air are immediately sucked through the slit-shaped vacuum suction hole (401) formed at the bottom of the vacuum suction unit (400).

[0150] The first vacuum suction block (410) is provided with a vacuum supply pipe (411) that connects to an external vacuum source, so that foreign substances are drawn in through the negative pressure formed along the suction hole, and the drawn-in foreign substances are discharged to the outside through the discharge pipe (412). This structure serves to remove residues remaining after cleaning while continuously maintaining cleanliness within the process space.

[0151] Third, in the opening area adjustment step, the screen plate (510) of the screen part (500) slides left and right depending on the width of the film or the range requiring cleaning, and the exposure area of ​​the opening (110) at the bottom of the main body part is selectively adjusted.

[0152] The screen plate moves along the moving guide groove (120), and can be accurately fixed at a position desired by the user through a combination of the moving plates (520) arranged on both sides, the sliding holes (531) formed at the ends thereof, and the positioning holes (130) formed in the main body. This allows for the free selection of precise local cleaning or full cleaning.

[0153] Finally, the nozzle unit (300) and the screen plate (510) operate in conjunction with each other. A portion of the lower portion of the nozzle unit is in contact with the upper surface of the screen plate, and this contact is designed to be maintained even when the screen plate slides. This structure maintains alignment and close contact between the nozzle unit and the screen unit even while the cleaning air is being sprayed, thereby ensuring consistent and stable cleaning quality without air leakage.

[0154] Through this, the present invention has the effect of effectively preventing damage to the copper film during cleaning by moving the film while cleaning foreign substances formed on the copper film of a secondary battery and spraying cleaning air into the cleaning area of ​​the film moving to the cleaning section to remove foreign substances while preventing the foreign substances being removed from flying out, thereby effectively preventing damage to the copper film during cleaning. Through this, the present invention can effectively prevent damage to the pattern formed on the film of a secondary battery.

[0155] According to the configuration and operating principle, the cleaning device of the present invention provides the following specific effects.

[0156] First, precision spraying and uniform cleaning are achieved through a curvature-based structure. The copper foil is moved along a convex guide block, and the nozzle, suction unit, and screen sections are formed with concave surfaces that form a corresponding curve. This maintains a constant gap between the film and the device, allowing cleaning air to be distributed evenly across the entire film, ensuring a consistent cleaning effect.

[0157] Second, it prevents the spread of foreign substances and maintains a cleanroom environment. Contaminants removed by the cleaning air are immediately sucked and discharged externally through the slit-shaped vacuum suction hole (401). This prevents foreign substances from spreading outside the process or causing re-contamination, and maintains a stable level of cleanliness in the cleaning environment.

[0158] Third, the possibility of film damage can be dramatically reduced. During the cleaning process, components and the film do not come into direct contact, and the film is safely guided by its curved structure, eliminating the wrinkles, tears, and scratches that commonly occur with thin copper films.

[0159] Fourth, it enables energy savings and process flexibility. The aperture control function utilizing the screen section (500) allows cleaning energy to be focused only on the required area, reducing unnecessary energy waste. Furthermore, it allows for the processing of films of various sizes and shapes, thereby increasing the flexibility of the manufacturing process.

[0160] Finally, the cleaning device of the present invention boasts high maintenance efficiency thanks to its modular structure. Each component is designed to slide, connect, and detach, allowing for easy and quick maintenance, cleaning, and parts replacement. This contributes to extending the life of the equipment and ensuring operational stability.

[0161] The present invention is a technology that realizes high-quality cleaning through precise air injection and effective foreign substance suction function in a process of cleaning a copper thin film of a secondary battery.

[0162] The nozzle unit (300) sprays uniform cleaning air downward through the spray holes (320a) arranged in two rows, thereby effectively removing contaminants attached to the surface of the film (F), and the vacuum suction unit unit (400) quickly recovers foreign substances that have fallen off through the slit-shaped vacuum suction holes (401), thereby preventing external scattering and maintaining the cleanliness of the process line.

[0163] All components involved in the cleaning process are designed along the curvature to avoid direct contact with the copper foil, minimizing the possibility of damage to the thin, sensitive film.

[0164] In addition, the screen part (500) is structured to be able to adjust the open area of ​​the opening (110) through which cleaning air is sprayed, so that cleaning energy can be concentrated on a necessary area and can flexibly respond to films (ㄹ) of various specifications.

[0165] The nozzle section (300) and the screen section (500) are in close contact with each other in a slip contact structure to prevent air leakage even during cleaning, thereby maintaining a constant and stable cleaning quality.

[0166] The screen part (500) and other components are structured to be easy to slide, fasten, and disassemble, making maintenance easy and ensuring excellent durability of the device.

[0167] The entire device is composed of a modular system, making it intuitive to operate, easy to apply to processes, and able to maintain high reliability even in repetitive processes.

[0168] As a result, the present invention can dramatically improve the quality and productivity of the secondary battery manufacturing process by integrating various functional advantages such as precise cleaning, prevention of foreign matter scattering, and improved energy efficiency.

[0169] Through this, the present invention provides a high-efficiency, high-precision, and high-reliability film cleaning solution, and establishes a technological foundation suitable for next-generation secondary battery production lines.

[0170] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the present invention pertains can make various modifications without departing from the gist of the present invention claimed in the claims, and such modifications are within the scope of the claims.

[0171] 100: Main body

[0172] 110: Opening

[0173] 120: Moving Guide Home

[0174] 130: Positioning hole

[0175] 200: Cleaning air supply unit

[0176] 300: Nozzle section

[0177] 310: Nozzle body

[0178] 310a: Hall

[0179] 311: Unit nozzle body

[0180] 320: Absence of injection

[0181] 320a: Injection hole

[0182] 321: Lower body

[0183] 322: Upper body

[0184] 400: Vacuum suction unit

[0185] 401: Slit-type vacuum suction hole

[0186] 410: First vacuum suction block

[0187] 410a: Home 1

[0188] 411: Vacuum supply tube

[0189] 412: Exhaust pipe

[0190] 420: Second vacuum suction block

[0191] 420a: 2nd home

[0192] 420b: Combination home

[0193] 500: Screen Part

[0194] 510: Screen plate

[0195] 520: Moving Plate

[0196] 530: Seal plate

[0197] 531: Sliding hole

Claims

1. A main body portion arranged on a path along which a copper foil film of a secondary battery moves, having an internal space formed and an opening formed at the bottom; A cleaning air supply unit provided at the upper end of the main body and supplying cleaning air supplied from the outside to the internal space of the main body; A nozzle part installed in the main body so as to be positioned below the cleaning air supply part, and spraying the supplied cleaning air into the opening of the main body part; A vacuum suction unit part installed on one side of the main body part so as to be positioned on one side of the opening, and having a slit-shaped vacuum suction hole formed at the bottom to provide vacuum suction force provided from the outside; It includes a screen part that is slidably positioned at the lower end of the other side of the main body part and changes the open area of ​​the opening as it slides, The lower surface of the nozzle portion, the lower surface of the vacuum suction unit portion, and the lower surface of the screen portion form a concave surface with a certain curvature along the upward direction based on the path along which the copper foil of the secondary battery moves, The above vacuum suction hole is characterized in that it is formed along the path along which the copper foil film of the secondary battery moves. Cleaning device for copper thin film of secondary battery.

2. In paragraph 1, At the bottom of the above nozzle part, Two rows of injection holes are formed at equal intervals along a direction perpendicular to the path along which the copper foil of the secondary battery moves. The supplied cleaning air is characterized in that it is sprayed downward through the spray holes. Cleaning device for copper thin film of secondary battery.

3. In paragraph 1, The above vacuum suction unit part, It comprises a first vacuum suction block and a second vacuum suction block coupled to the first vacuum suction block, A concave surface is formed at the bottom of the first and second vacuum suction blocks, The above first vacuum suction block is provided with a vacuum supply pipe that receives vacuum from the outside, and discharge pipes that suck up foreign substances formed on the upper surface of the copper thin film of the secondary battery through the vacuum suction hole and discharge them to the outside. A first cut groove is formed on the lower side of the first vacuum suction block, A cut second groove is formed on the lower side of the second vacuum suction block facing the first groove, The above vacuum suction hole is, When the first vacuum suction block and the second vacuum suction block are coupled to each other, characterized in that it is formed by the first and second grooves. Cleaning device for copper thin film of secondary battery.

4. In paragraph 3, At the bottom of the second vacuum suction block, Characterized in that a joining groove is formed at one end of the nozzle portion, Cleaning device for copper thin film of secondary battery.

5. In paragraph 1, At the bottom of both sides of the main body with the above opening as the boundary, Characterized in that a movement guide groove having a set movement length for guiding the movement of the above screen portion is formed. Cleaning device for copper thin film of secondary battery.

6. In paragraph 5, The above screen part, characterized by including a screen plate on a plate formed to form a concave groove, Cleaning device for copper thin film of secondary battery.

7. In paragraph 6, The lower part of the above nozzle section is, Characterized in that the upper surface of the screen plate that is slidably moved is brought into contact with the surface so that it can slip. Cleaning device for copper thin film of secondary battery.

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