Apparatus for cleaning rolling roller

Abstract

An apparatus for cleaning a rolling roller configured to roll an electrode, according to one embodiment of the present invention, may comprise: a cleaning member for bringing a cleaning cloth into contact with a surface of the rolling roller; and the cleaning cloth for cleaning the rolling roller while passing between the rolling roller and the cleaning member, wherein the cleaning member supplies a cleaning solution to the cleaning cloth.

Description

Rolling roll cleaning device

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0091884, filed July 14, 2023, and Korean Patent Application No. 10-2024-0089059, filed July 5, 2024, the entire contents of which are incorporated herein by reference.

[0003] The present invention relates to a rolling roll cleaning device, and more particularly, to a cleaning device having an improved method of supplying a cleaning liquid when cleaning a rolling roll.

[0004] In modern society, the widespread use of portable devices like cell phones, laptops, camcorders, and digital cameras, as well as energy storage systems (ESS), has led to active development of related technologies. Furthermore, rechargeable secondary batteries are increasingly being used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) to address air pollution issues caused by conventional gasoline-powered vehicles. This, in turn, heightens the need for further development of these batteries.

[0005] Currently commercialized secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries are receiving the most attention due to their advantages of free charging and discharging, low self-discharge rate, and high energy density.

[0006] These lithium secondary batteries primarily use lithium oxide and carbon materials as the positive and negative electrode active materials, respectively. Lithium secondary batteries comprise an electrode assembly comprising positive and negative plates coated with the positive and negative electrode active materials, respectively, with a separator interposed between them, and an outer case, i.e., a battery case, that seals and encloses the electrode assembly together with an electrolyte.

[0007] These secondary batteries are widely used not only in small devices like portable electronic devices, but also in medium- to large-scale devices like electric vehicles and energy storage systems (ESS), and their use is rapidly increasing. Furthermore, the use of residential battery packs for power storage has been on the rise recently.

[0008] The manufacturing process of these lithium secondary batteries is largely divided into three stages: electrode process, assembly process, and formation process. The electrode process is further divided into active material mixing process, electrode coating process, rolling process, slitting process, and winding process. Among these, the rolling process is a process in which the electrode substrate is passed between a pair of rolling rolls heated at a high temperature to compress it to a desired thickness in order to reduce the thickness of the electrode substrate after the coating process to increase the capacity density and increase the adhesion between the electrode current collector and the electrode active material.

[0009] In this rolling process, if the active material or other foreign substances remaining after rolling are attached to the rolls during rolling as the rolling is repeated, the foreign substances may be attached to the electrodes during the subsequent rolling process, thereby reducing the quality of the electrodes and the batteries including the electrodes. Therefore, a rolling roll cleaning device is used to remove contamination from the rolling rolls.

[0010] Figure 1 illustrates a conventional rolling roll cleaning device used in a rolling process. An electrode substrate (1) having an electrode mixture layer (3) applied on a current collector (2) passes between a pair of rolling rolls (10). The electrode mixture layer (3) includes an electrode active material, a conductive material, and a binder.

[0011] In a conventional rolling roll cleaning device (20), while the rolling roll (10) is driven for electrode manufacturing, a cleaning liquid (21) is sprayed onto a cleaning cloth (23) through a nozzle (22) (e.g., a spray-type nozzle), and the cleaning cloth (23) passes through a cleaning roller (24), and the rolling roll (10) is cleaned with the cleaning cloth (23) sprayed with the cleaning liquid.

[0012] At this time, when cleaning the rolling roll during the process of manufacturing the electrode (1) while the rolling roll (10) is driven, there are restrictions on the type and amount of cleaning liquid (21) used to maintain the amount of residual moisture in the electrode (1), and an oil-based cleaning liquid containing an oil component is mainly used.

[0013] Meanwhile, due to the characteristics of the electrode process, a period of non-operation of the rolling roll (10) occurs. At this time, there may be cases where the cleaning solution (21) previously sprayed on the cleaning cloth (23) evaporates / dries, and the rolling roll (10) is not properly cleaned. For these and other various reasons, it is necessary to diversify the method of supplying the cleaning solution (21).

[0014] The purpose of the present invention is to provide a cleaning device with an improved method of supplying a cleaning liquid when cleaning a rolling roll.

[0015] However, the problems to be solved by the embodiments of the present invention are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0016] A device for cleaning a rolling roll for rolling an electrode according to one embodiment of the present invention includes a cleaning member that brings a cleaning cloth into contact with a surface of the rolling roll, and a cleaning cloth that cleans the rolling roll while passing between the rolling roll and the cleaning member, wherein the cleaning member can supply a cleaning liquid to the cleaning cloth.

[0017] The above cleaning member may include a main body with which the cleaning cloth comes into contact, and a cleaning solution supply hole provided on the surface of the main body and capable of supplying the cleaning solution.

[0018] The cleaning solution supply holes are provided in multiple numbers, and the multiple cleaning solution supply holes can be arranged along the width direction of the cleaning member in a portion of the cleaning member.

[0019] Each of the above plurality of cleaning solution supply holes can be arranged at a predetermined, constant interval.

[0020] The plurality of cleaning solution supply holes may be arranged in a row along the width direction of the cleaning member.

[0021] The cleaning solution supply unit for directly supplying the cleaning solution to the cleaning cloth is further included, and the cleaning solution supply unit is arranged at the front end of the cleaning member based on the direction of movement of the cleaning cloth, and the cleaning solution can be supplied to the cleaning cloth from at least one of the cleaning member and the cleaning solution supply unit.

[0022] The cleaning solution can be supplied from the cleaning solution supply unit to the cleaning cloth, and the cleaning solution can be replenished from the cleaning member to the cleaning cloth.

[0023] During the operation period of the rolling roll, the cleaning liquid may be supplied from the cleaning liquid supply unit, and immediately after the operation of the rolling roll is stopped and then resumed, the cleaning liquid may be supplied from the cleaning member to the cleaning cloth for a predetermined period of time.

[0024] The cleaning liquid supplied from the cleaning liquid supply unit to the cleaning cloth and the cleaning liquid supplied from the cleaning member to the cleaning cloth may be the same in type or composition.

[0025] The cleaning liquid supplied from the cleaning liquid supply unit to the cleaning cloth and the cleaning liquid supplied from the cleaning member to the cleaning cloth may have different types or components.

[0026] The above cleaning solution supply unit includes a nozzle that sprays the cleaning solution onto the cleaning cloth, and can spray the cleaning solution onto a surface opposite to the surface of the cleaning cloth facing the rolling roll.

[0027] The nozzle that sprays the above cleaning solution may include a fluid nozzle.

[0028] The cleaning cloth may include a suction unit that sucks in the cleaning liquid supplied from the cleaning liquid supply unit and is sprayed on the opposite side of the cleaning liquid supply unit.

[0029] The device may further include a housing that houses the cleaning solution supply unit therein, the cleaning cloth may pass through the housing, and the suction unit may be provided in the housing.

[0030] The cleaning member may include a cleaning solution receiving portion capable of receiving the cleaning solution inside the cleaning member.

[0031] The above cleaning member further includes an inlet for the cleaning liquid to flow in, and a pipe or tube is connected to the inlet so that the cleaning liquid can be supplied into the interior of the cleaning member.

[0032] It may further include a cleaning cloth supply unit for supplying the cleaning cloth, and a cleaning cloth recovery unit for recovering the cleaning cloth.

[0033] The above cleaning cloth supply unit can unwind a cleaning cloth wound in a roll type, and the cleaning cloth recovery unit can wind the cleaning cloth that has passed through the cleaning member.

[0034] The device further includes a housing for storing components of the rolling roll cleaning device, wherein a surface of the housing facing the rolling roll includes an opening, and the cleaning cloth is exposed through the opening and can come into contact with the rolling roll.

[0035] It may further include a sensing unit that senses the degree of inclination of the cleaning member or the degree of deflection of the cleaning cloth passing over the cleaning member.

[0036] According to the present invention, since the method of supplying a cleaning solution during cleaning of a rolling roll is diversified, the cleaning efficiency of the rolling roll and the efficiency of the electrode manufacturing process according to the cleaning efficiency of the rolling roll can be maximized, and the quality of the electrode produced in the rolling process and the battery cell including the electrode can also be improved.

[0037] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0038] Figure 1 shows a conventional rolling roll cleaning device used in a rolling process.

[0039] Figure 2 is a schematic diagram of a rolling roll cleaning device according to one embodiment of the present invention.

[0040] Fig. 3 illustrates an example of a cleaning member, which is a component of the rolling roll cleaning device of Fig. 2.

[0041] Fig. 4 is a cross-sectional view along line AA of the cleaning member of Fig. 3.

[0042] Fig. 5 illustrates an example of cleaning a rolling roll using the cleaning member of Fig. 2.

[0043] Fig. 6 is a modified example of the cleaning member of Figs. 3 to 5, with some modifications.

[0044] Fig. 7 illustrates another embodiment of the rolling roll cleaning device of Fig. 2.

[0045] Figure 8 illustrates another embodiment of a modified version of the rolling roll cleaning device of Figure 2.

[0046] Fig. 9 illustrates an example of a housing for preventing the cleaning solution from splashing in Fig. 8.

[0047] FIG. 10 illustrates another embodiment of the rolling roll cleaning device of FIG. 2, which is a modified version of the embodiments of FIGS. 7 and 8.

[0048] Fig. 11 illustrates another embodiment of a modified version of the rolling roll cleaning device of Fig. 2.

[0049] Fig. 12 illustrates another embodiment of a modified rolling roll cleaning device of Fig. 2.

[0050] Fig. 13 illustrates an embodiment of the rolling roll cleaning device described above in Figs. 2 to 12.

[0051] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0052] 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.

[0053] Furthermore, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to the illustrated components. In the drawings, the thicknesses are enlarged to clearly represent various layers and regions. Furthermore, in the drawings, the thicknesses of some layers and regions are exaggerated for convenience of explanation.

[0054] Furthermore, when we say that a layer, membrane, region, plate, or other part is "on" or "over" another part, this includes not only cases where it is "directly on" the other part, but also cases where there are other parts in between. Conversely, when we say that a part is "directly on" another part, it means that there are no other parts in between. Furthermore, saying that a part is "on" or "over" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "above" or "over" the direction opposite to gravity.

[0055] Additionally, throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0056] Additionally, throughout the specification, when we say "in plan", we mean when the target portion is viewed from above, and when we say "in cross section", we mean when the target portion is viewed from the side in a cross-section cut vertically.

[0057] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0058] Figure 2 is a schematic diagram of a rolling roll cleaning device according to one embodiment of the present invention.

[0059] A rolling roll cleaning device (100) according to one embodiment of the present invention largely includes a cleaning member (110), a cleaning cloth (120), and a cleaning liquid supply unit (130). In addition, as described below, the cleaning member (110) can also supply a cleaning liquid (160).

[0060] Since the cleaning member (110) must first remove foreign substances attached to the surface of the rolling roll (10) after the rolling of the electrode (1), it is positioned closest to the point where the rolling roll (10) rolls the electrode, based on the rotation direction of the rolling roll (10). The cleaning member (110) may be, for example, in the shape of a cleaning roll (roller), and when the contact portion between the cleaning member (110) and the rolling roll (10) is rounded, the cleaning cloth (120) can prevent the rolling roll (10) from being damaged when it comes into contact with the rolling roll (10). For example, it may rotate in the opposite direction to the rotation direction of the rolling roll (10).

[0061] The present invention is not limited to what is illustrated, and it is sufficient if the cleaning member (110) has a structure and shape that can clean the surface of the rolling roll (10) by supplying a cleaning cloth (120), and the cleaning member (110) can be variously modified and changed to suit the environment to which the present invention is applied. In addition, the cleaning member (110) may be provided as a single unit as illustrated in the schematic diagram of Fig. 2, but there is no particular limitation on the number of cleaning members (110).

[0062] Meanwhile, according to embodiments of the present invention, the cleaning liquid (160) inside the cleaning member (110) can be supplied to the cleaning cloth (120) through the cleaning liquid supply hole (112, see FIG. 3) provided on the surface of the cleaning member (110). The method by which the cleaning liquid (160) is supplied to the cleaning cloth (120) through the cleaning member (110) will be described later with reference to FIG. 3 and the like.

[0063] The cleaning cloth (120) is supplied from the cleaning cloth supply unit (140) and transported to the cleaning member (110). For example, the cleaning cloth supply unit (140) may be a sheet-shaped long cleaning cloth (120) wound in a roll shape, and the cleaning cloth (120) unwound from the cleaning cloth supply unit (140) may be transported to the cleaning member (110). The cleaning member (110) is adjacent to the surface of the rolling roll (10), so that one surface of the cleaning cloth (120) can be brought into contact with the rolling roll (10). That is, the cleaning cloth (120) passes between the rolling roll (10) and the cleaning member (110) and comes into contact with the rolling roll (10) to clean the rolling roll (10).

[0064] The cleaning cloth (120) that has passed the cleaning member (110) is recovered in the cleaning cloth recovery unit (150). For example, the cleaning cloth recovery unit (150) may be configured to wind the cleaning cloth (120) in a roll shape. In other words, each of the cleaning cloth supply unit (140) and the cleaning cloth recovery unit (150) may be manufactured in the form of a cylindrical bar or bobbin, for example, to unwind and wind the cleaning cloth (120). The cleaning member (110) may rotate simultaneously with the moving direction of the cleaning cloth (120), and the cleaning cloth supply unit (140) and the cleaning cloth recovery unit (150) may also rotate in the same manner.

[0065] In addition, the rolling roll (10) in the embodiment of Fig. 2 corresponds to the upper rolling roll (10) among a pair of rolling rolls arranged vertically. An electrode (1, see Fig. 1) passes below the upper rolling roll (10) of Fig. 2. With respect to the electrode (1), the cleaning cloth supply unit (140) is located further outward than the cleaning cloth recovery unit (150). When explaining the upper rolling roll (10) of Fig. 2 as an example, the cleaning cloth supply unit (140) is located higher than the cleaning cloth recovery unit (150).

[0066] The cleaning cloth (120) can smoothly absorb or remove foreign substances attached to the rolling roll (10) and does not damage the surface of the rolling roll (10), and there is no limitation on its type. For example, a non-woven fabric can be used. In addition, the material of the non-woven fabric is not limited as long as it can absorb or remove foreign substances, and cotton fiber, polyethylene fiber, polypropylene fiber, polyester, aramid fiber, cellulose fiber, rayon fiber, or a non-woven fabric mixed with these can be used.

[0067] According to one embodiment of the present invention, the rolling roll cleaning device (100) can supply the cleaning liquid (160) from the cleaning liquid supply unit (130) and can also supply the cleaning liquid (160) from the cleaning member (110). That is, supplying the cleaning liquid (160) from the cleaning liquid supply unit (130) to the cleaning cloth (120) and supplying the cleaning liquid (160) from the cleaning member (110) in contact with the cleaning cloth (120) to the cleaning cloth (120) are performed separately. Depending on the process environment in which the present invention is implemented, the cleaning liquid (160) may be supplied from either one selected from the cleaning liquid supply unit (130) and the second cleaning member (110), or the cleaning liquid (160) may be supplied from both the cleaning liquid supply unit (130) and the cleaning member (110). The cleaning solution (160) supplied from the cleaning solution supply unit (130) and the cleaning solution (160) supplied from the cleaning member (110) may be cleaning solutions of the same type and / or components, or in some cases, may be cleaning solutions of different types and / or components, depending on the process environment in which the present invention is implemented.

[0068] The cleaning solution supply unit (130) may be placed at the front end of the cleaning member (120) based on the direction of movement of the cleaning cloth (120). In the case where a plurality of cleaning members (120) are provided, a cleaning solution supply unit (130) may be additionally placed between each cleaning member (120).

[0069] The cleaning solution supply unit (130) may be configured to directly spray the cleaning solution (160) onto the cleaning cloth (120) using a nozzle or spray, for example, as illustrated in FIG. 2. However, the cleaning solution (160) may also be configured to evenly drop across the entire area of ​​the cleaning cloth (120) (e.g., across the width direction), or the cleaning cloth (120) may be immersed in the cleaning solution (160) as it passes through the cleaning solution supply unit (130) to absorb the cleaning solution (160). In the case where the cleaning solution supply unit (130) is configured to be a spray, it may include, for example, a one-fluid nozzle and / or a two-fluid nozzle. In the case where the one-fluid nozzle is employed in the cleaning solution supply unit (130), scattering of the cleaning solution (160) can be prevented more effectively than in the case of a two-fluid nozzle.

[0070] As illustrated in FIG. 2, the cleaning solution supply unit (130) can supply (spray) the cleaning solution (160) to the opposite side of the side of the cleaning cloth (120) facing the rolling roll (10) (the side where the cleaning cloth (120) comes into contact with the rolling roll (10). In this case, when the cleaning cloth (120) supplied with the cleaning solution (160) comes into contact with the rolling roll (10), the cleaning solution (160) can be prevented from dripping onto the electrode (1) as a leak or the like. In addition, although not illustrated in detail in FIG. 2, the cleaning solution supply unit (130) includes a cleaning solution storage tank, a cleaning solution transfer pipe, a pump, a valve, a pump, and / or a nozzle, and various modifications and changes are possible in the structure, shape, number, etc. of the detailed components of the cleaning solution supply unit (130) according to the environment in which the present invention is implemented. A suction unit (not shown) that can suck up the cleaning solution (160) that is sprayed in the form of mist or leaked may be additionally provided around the cleaning solution supply unit (130).

[0071] As described above when explaining the upper rolling roll (10) of FIG. 2 as an example, the cleaning cloth supply unit (140) is located higher than the cleaning cloth recovery unit (150). In addition, the cleaning liquid supply unit (130) supplies (sprays) the cleaning liquid (160) to the surface opposite to the surface of the cleaning cloth (120) facing the rolling roll (10) (the surface on which the cleaning cloth (120) comes into contact with the rolling roll (10). Accordingly, the concern that the cleaning liquid (160) will remain on the surface of the rolling roll (10) is significantly reduced.

[0072] To elaborate, assuming the opposite case, where the cleaning solution supply unit (130) sprays the cleaning solution (130) onto the surface of the cleaning cloth (120) facing the rolling roll (10), there is a risk that the cleaning solution (130) may scatter onto the rolling roll (10). Alternatively, since the cleaning solution (120) moves from the cleaning solution supply unit (140) located relatively above to the cleaning solution recovery unit (150) located relatively below, if the cleaning solution (160) is supplied to the outer surface of the cleaning cloth (120) (i.e., the surface that comes into contact with the rolling roll (10), there is a risk that the cleaning solution (160) may flow down along the surface of the cleaning cloth (120) toward the rolling roll (10). In both cases, there is a risk that the cleaning solution (130) will remain on the surface of the rolling roll (10), which may affect the electrode rolling quality.

[0073] In addition, when the cleaning solution supply unit (130) is located on the opposite side of the surface of the cleaning cloth (120) facing the rolling roll (10), there is an advantage in that a discharge pipe, etc., connected to a second housing (173, FIG. 9) for preventing the cleaning solution (130) from flying away, which is a relatively larger facility, can be easily installed.

[0074] In addition, a plurality of cleaning solution supply units (130) may be provided. For example, a cleaning solution supply unit for supplying water or an aqueous cleaning solution and a cleaning solution supply unit for supplying an oil-based cleaning solution may be provided, respectively.

[0075] In Fig. 2, the cleaning solution supply unit (130) is arranged at the rear of the cleaning cloth (120) to supply the cleaning solution (160) to the cleaning cloth (120). However, the present invention is not limited thereto, and the cleaning solution supply unit (130) may be arranged at the front or both front and rear sides of the cleaning cloth (120). That is, it is sufficient if the cleaning solution (160) can be supplied to an extent that the rolling roll (10) can be cleaned by the cleaning cloth (120), and various modifications and changes are possible. Here, the front of the cleaning cloth (120) means the surface that comes into contact with the rolling roll (10), and the rear of the cleaning cloth (120) means the surface opposite to the surface that comes into contact with the rolling roll (10).

[0076] Meanwhile, according to the present invention, the cleaning liquid (160) can also be supplied to the cleaning cloth (120) from the cleaning member (110). To this end, an additional cleaning liquid supply unit (not shown) for supplying the cleaning liquid (160) to the cleaning member (110) may be separately provided outside the cleaning member (110) and connected to a pipe / tube, etc. to supply the cleaning liquid (160) to the cleaning member (110). However, the present invention is not limited thereto, and various modifications and changes are possible, such as an additional cleaning liquid supply unit (not shown) for supplying the cleaning liquid (160) to the cleaning member (110) being integrally provided inside or outside the cleaning member (110).

[0077] In the rolling process, there are cases where the rolling roll (10) is stopped periodically or irregularly. In this case, if the non-operation period is long, the cleaning solution (160) supplied by the cleaning solution supply unit (130) may evaporate or dry in the cleaning cloth (120). Accordingly, the cleaning solution (160) evaporates or dries in the cleaning cloth (120) in the section from the cleaning solution supply unit (130) to the cleaning member (110), making it difficult to clean the rolling roll (10).

[0078] After this, when the rolling roll (10) is restarted, if contamination or foreign matter occurs on the rolling roll (10) during the time period during which the cleaning cloth (120) of the corresponding section (section from the cleaning solution supply unit (130) to the cleaning member (110)) passes over the cleaning member (110), the possibility of defects occurring in the electrode (1) rolled by the corresponding rolling roll (10) increases.

[0079] When the cleaning solution (160) supplied from the cleaning solution supply unit (130) is disposed close to the rolling roll (10) and sprayed, there is a concern that the cleaning solution (160) in the form of mist may come into contact with the electrode (1) passing over the rolling roll (10), thereby affecting the quality of the electrode (1). To prevent this, the cleaning solution supply unit (130) may be disposed at a considerable distance from the rolling roll (10). Alternatively, depending on the scale / size of the process equipment, the cleaning solution supply unit (130) may be disposed at a considerable distance from the rolling roll (10).

[0080] In this case, if the rolling roll (10) is restarted after the cleaning solution (160) in the cleaning cloth (120) from the cleaning solution supply unit (130) to the cleaning member (110) has evaporated or dried over a considerable distance, the rolling roll (10) may not be cleaned for a corresponding considerable period of time.

[0081] In some cases, in addition to the cases described above, even if the cleaning liquid (160) supplied from the cleaning liquid supply unit (130) does not completely evaporate or dry in the cleaning cloth (120) when it reaches the cleaning member (110) and remains in a liquid (or gel) state, the cleaning liquid (160) remaining in the liquid state in the cleaning cloth (120) may not be able to sufficiently clean the rolling roll (10).

[0082] Accordingly, during the operation period of the rolling roll (10), the cleaning liquid (160) is supplied from the cleaning liquid supply unit (130), and immediately after the operation of the rolling roll (10) is stopped and then resumed, the cleaning liquid (160) is supplied from the cleaning member (110) to the cleaning cloth (120) for a predetermined period of time, so that the cleaning work of the rolling roll (10) can be performed normally immediately after the operation of the rolling roll (10).

[0083] Alternatively, in some cases, even if the cleaning liquid (160) supplied from the cleaning liquid supply unit (130) remains in a liquid state in the cleaning cloth (120) to a degree sufficient to clean the rolling roll (10) when it reaches the cleaning member (110), there may be cases where a cleaning liquid (160) of a different type and / or component must be additionally supplied to the cleaning cloth (120) for special purposes, etc.

[0084] Alternatively, in some cases, the rolling roll (10) may need to be continuously operated while simultaneously cleaning the rolling roll (10) during a period of time when the cleaning solution (160) cannot be supplied from the cleaning solution supply unit (130) to the cleaning cloth (120) in order to inspect or replace the cleaning solution supply unit (130).

[0085] It is more advantageous to apply a method of supplying the cleaning solution (160) from the cleaning member (110) during a rolling process stop or immediately after the rolling process is resumed.

[0086] In preparation for the above-described cases or various other cases, the cleaning solution (160) can be supplied from the cleaning member (110) to the cleaning cloth (120). Alternatively, the cleaning solution (160) can be supplied from the cleaning member (110) to the cleaning cloth (120) alone without the cleaning solution supply unit (130).

[0087] In the cleaning member (110), it is preferable to use an oil-based cleaning solution as the cleaning solution (160). This is because it is placed close to the rolling roll (10). However, in the case where the rolling process is stopped to clean the rolling roll (10) and the rolling roll (10) is cleaned using an aqueous cleaning solution, the cleaning member (110) that used the oil-based cleaning solution may be replaced with a cleaning member (110) that uses an aqueous cleaning solution to perform the cleaning.

[0088] It is preferable to use an oil-based cleaning solution as the cleaning solution (160) supplied from the cleaning solution supply unit (130) during the rolling process. However, in the case where the rolling process is stopped to clean the rolling roll (10) and the rolling roll (10) is cleaned using an aqueous cleaning solution, the rolling roll (10) can be cleaned by supplying an aqueous cleaning solution from the cleaning solution supply unit (130).

[0089] In addition to the cases described above, it goes without saying that an oil-based cleaning solution can be used even when the rolling process is stopped for cleaning the rolling roll (10).

[0090] Fig. 3 illustrates an example of a cleaning member, which is a component of the rolling roll cleaning device of Fig. 2. Fig. 4 is a cross-sectional view of the cleaning member of Fig. 3 taken along line AA. Fig. 5 illustrates an example of cleaning a rolling roll using the cleaning member of Fig. 2. Fig. 6 is a modified example of the cleaning member of Figs. 3 to 5, with some modifications.

[0091] FIG. 3 illustrates, by way of example, a case where the cleaning member (110) has a cylindrical cleaning roll (roller) shape. The cleaning member (110) according to an embodiment of the present invention includes a main body (111) and a cleaning liquid supply hole (112) provided on the surface of the main body (111). The main body (111) may have, for example, a cylindrical, cylindrical, or cylinder shape, but the present invention is not limited thereto.

[0092] The shape, number, and arrangement of the cleaning solution supply holes (112) are not limited to those illustrated in the present invention, and any suitable arrangement is sufficient as long as the cleaning solution (160) can be evenly supplied to clean the rolling roll (10). A plurality of cleaning solution supply holes (112) may be provided. The plurality of cleaning solution supply holes (112) may be arranged at a predetermined, constant interval. The plurality of cleaning solution supply holes (112) may be arranged in a row or in a zigzag pattern along the width direction in a portion of the cleaning member (110). In addition, depending on the case, as illustrated in FIG. 6, a plurality of cleaning solution supply holes (112) may be arranged in a row in each of a plurality of columns. Alternatively, the cleaning solution supply holes (112) may be formed as fine-sized holes and evenly distributed over the whole area of ​​the cleaning member (110), and various modifications and changes are possible.

[0093] Additionally, in some cases, a cleaning solution supply nozzle (not shown) may be additionally provided in each cleaning solution supply hole (112) to spray the cleaning solution (160) at predetermined time intervals. At this time, the cleaning solution supply nozzle may not protrude outward from the surface of the main body (111) so as not to damage the surface of the rolling roll (10).

[0094] As shown in Fig. 4, an empty space as a cleaning solution receiving portion (111a) can be provided inside the cleaning member (110), and the cleaning solution (160) can be stored in the space.

[0095] The main body (111) of the cleaning member (110) may include a shaft (113) on both sides as an axis for supporting the cleaning member (110) and allowing the cleaning member (110) to be rotated. In addition, a support member (114) may be coupled to both sides of the main body (111) via the shaft (113) or directly to the main body (111).

[0096] In addition, the cleaning member (110) may include an inlet (115) for supplying cleaning liquid (160) into the inside. A pipe or tube (not shown) may be connected between the cleaning liquid supply unit (not shown) for supplying the cleaning liquid (160) to the cleaning member (110) and the inlet (115), so that the cleaning liquid (160) can be continuously supplied into the cleaning member (110) during the cleaning operation. Alternatively, the cleaning liquid (160) may be supplied into the cleaning member (110) and then the inlet (115) may be closed during the cleaning operation. The position, shape, and structure of the inlet (115) are not limited to those shown, and any position, shape, and structure that can supply the cleaning liquid (160) into the cleaning member (110) is sufficient.

[0097] As illustrated in Fig. 5, a cleaning member (110) is positioned on the surface of a rolling roll (10), and a cleaning cloth (120) moves toward the cleaning member (110) and passes between the cleaning member (110) and the rolling roll (10). At this time, the cleaning liquid (160) present inside the cleaning member (110) can be supplied to the cleaning cloth (120) through the cleaning liquid supply hole (112) of the cleaning member (110).

[0098] As shown in FIG. 6, when a plurality of cleaning solution supply holes (112) are arranged in a plurality of rows, in order to prevent the cleaning solution (160) from leaking from the cleaning solution supply holes (112) of rows other than the cleaning solution supply holes (112) of the row in contact with the cleaning cloth (120), the cleaning solution (160) can be supplied to the cleaning member (110) continuously or only in small amounts at short time intervals.

[0099] Fig. 7 illustrates another embodiment of a modified version of the rolling roll cleaning device of Fig. 2. As illustrated in Fig. 7, the respective components of the rolling roll cleaning device (100), namely, a cleaning member (110), a cleaning solution supply unit (130), a cleaning cloth supply unit (140), and a cleaning cloth recovery unit (150), can be housed in a first housing (170). The front surface of the first housing (170) facing the rolling roll (10) includes an opening (171), and through the opening (171), all or part of the cleaning member (110) and the cleaning cloth (120) passing over the cleaning member (110) are exposed and can come into contact with the rolling roll (10).

[0100] The first housing (170) may additionally be equipped with a suction unit (172) for suctioning (suctioning) the cleaning solution (160) that is dispersed or leaked in the form of mist. The position, structure, and shape of the suction unit (172) are not limited to those illustrated in the present invention. A cleaning solution (160) discharge pipe (not shown) is connected to the suction unit (172).

[0101] Fig. 8 illustrates another embodiment of a modified version of the rolling roll cleaning device of Fig. 2. Fig. 9 is a partial enlarged view of Fig. 8. In the embodiment of Fig. 8, the second housing (173) accommodates the cleaning solution supply unit (130), and unlike the embodiment of Fig. 7, the cleaning member (110), the cleaning cloth supply unit (140), and the cleaning cloth recovery unit (150) are not accommodated. The cleaning solution supply unit (130) is accommodated in the second housing (173), and the cleaning solution (160) is supplied from the cleaning solution supply unit (130) to the cleaning cloth (120) passing through the second housing (173).

[0102] As described above in Fig. 2, the cleaning liquid (160) is supplied from the cleaning liquid supply unit (130) to the opposite side of the surface of the cleaning cloth (120) that contacts the rolling roll (10). In addition, referring to Fig. 9, the cleaning liquid (160) supplied to the cleaning cloth (120) may be scattered, and the scattered cleaning liquid (160) is discharged to the outside through the suction unit (173-1) located on the upper part of the second housing (173) without touching the rolling roll (10) located outside the second housing (173). The suction unit (173-1) may include a pipe. When the cleaning solution supply unit (130) is located on the opposite side of the surface where the cleaning cloth (120) touches the rolling roll (10), the suction unit (173-1) that sucks the flying cleaning solution (160) can be located on the outside, making it easier to install the rolling roll cleaning device (100).

[0103] Fig. 10 illustrates another embodiment of a modified rolling roll cleaning device of Fig. 2, combining the embodiments of Figs. 7 and 8. The second housing (173) can be housed inside the first housing (170), and the description of the other first housing (170) overlaps with that described above in Fig. 7, and the description of the second housing (173) overlaps with that described above in Figs. 8 and 9, and therefore, refer to the description of the corresponding portions.

[0104] Fig. 11 illustrates another embodiment of a modified version of the rolling roll cleaning device of Fig. 2. The rolling roll cleaning device (100) of Fig. 11 additionally includes a sensing unit (180). The sensing unit (180) is positioned near the cleaning member (110) and can sense the degree to which the cleaning member (110) is tilted. Alternatively or additionally, the sensing unit (180) can also sense the degree to which the cleaning cloth (120) passing over the cleaning member (110) is tilted.

[0105] Fig. 12 illustrates another embodiment of a modified rolling roll cleaning device of Fig. 2. The rolling roll cleaning device (100) of Fig. 12 may additionally include an inspection unit (190a) and / or a drying unit (190b).

[0106] The inspection unit (190a) measures the brightness value of the surface of the rolling roll (10). The brightness value can be calculated by sensing the entire surface of the rolling roll (10), that is, sensing half of the outer surface of the cylindrical rolling roll (10) on which the inspection unit (190a) is located. In Fig. 1, the inspection unit (190a) is illustrated as one for convenience, but the present invention is not limited thereto, and two inspection units (190a) can be arranged to face each other on both sides of the rolling roll (10) so that the inspection units (190a) on both sides sense each half of the rolling roll (10) to calculate the brightness value.

[0107] Alternatively, various modifications and changes are possible, such as scanning while the inspection unit (190a) moves along the length or circumference of the cylindrical rolling roll (10), or scanning while moving spirally around the outer surface of the cylindrical rolling roll (10).

[0108] Additionally, optionally, the inspection unit (190a) may additionally detect foreign substances by determining a portion having a particularly low brightness value compared to the surrounding portion as a foreign substance.

[0109] The drying unit (190b) dries the surface of the rolling roll (10) that has been cleaned with a cleaning solution. The drying unit (190b) functions to dry the surface of the rolling roll (10) by heating and / or blowing air. Foreign substances can be dried and removed from the surface of the roll by heating and / or blowing air, and residual foreign substances in liquid form can be removed by evaporating by heating and / or blowing air. The drying unit (190b) may be a heater type that directly applies heat to the surface of the rolling roll (10), or may be a hot air drying method that applies hot air or the like to the surface of the rolling roll (10).

[0110] In addition, the rolling roll cleaning device (100) further includes a control unit (not shown) that controls each component, such as a cleaning member (110), a cleaning solution supply unit (130), an inspection unit (190a), and a drying unit (190b). The control unit receives data from the inspection unit (190a) or controls the operation of the cleaning member (110), the cleaning solution supply unit (130), and the drying unit (190b) according to a preset control algorithm.

[0111] Fig. 13 illustrates an embodiment of the rolling roll cleaning device described above with reference to Figs. 2 to 12. A plurality of cleaning members (110) (for example, three) may be provided and arranged in a row along the surface of the rolling roll (10). Fig. 13 illustrates an example in which the cleaning member (110), cleaning cloth (120), cleaning cloth supply unit (140), and cleaning cloth recovery unit (150) are housed in a housing (170). For the convenience of understanding the components housed inside the housing (170), the housing (170) is outlined. The housing (170) may be manufactured by modifying or changing it to suit various environments in which the present invention is implemented. In addition, other components are omitted from Fig. 13 for convenience, and reference is made to the descriptions above with reference to Figs. 2 to 12.

[0112] There is no limitation on the type of cleaning solution (160) as long as it can smoothly remove foreign substances, etc. Depending on the environment in which the present invention is implemented (e.g., whether the electrode rolling process is in progress, or whether the electrode rolling process is stopped or completed, etc.), an aqueous cleaning solution, an oil-based cleaning solution, or a combination of these may be used.

[0113] For example, cleaning solutions that can be used include water, acetone, dimethyl carbonate, dimethyl formamide, N-methyl formamide, sulfolane (tetrahydrothiophene-1,1-dioxide), 3-methylsulfolane, N-butyl sulfone, dimethyl sulfoxide, pyrrolidinone (HEP), dimethylpiperidone (DMPD), N-methyl pyrrolidinone (NMP), N-methyl acetamide, dimethyl acetamide (DMAc), dimethylformamide (DMF), diethylacetamide (DEAc), dipropylacetamide (DPAc), ethanol, propanol, butanol, hexanol, ethylene glycol, tetrachloroethylene, propylene glycol, toluene, turpentine, methyl acetate, ethyl acetate, petroleum ether, cresol, and glycerol.

[0114] When the rolling roll cleaning device (100) according to the present invention is applied while the rolling roll (10) is not in operation, an aqueous cleaning solution may be used as the cleaning solution (160), and specifically, at least one selected from the group including water or alcohol-based compounds may be used.

[0115] More specifically, the cleaning solution (160) may be a mixture of water and an alcohol compound, and the alcohol compound may be at least one selected from the group consisting of ethanol, propanol, butanol, pentanol, hexanol, isopropanol, heptanol, decanol, octanol, isotecanol, ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol methyl ether, diethylene glycol methyl ether, triethylene glycol methyl ether, ethylene glycol ethyl ether, diethylene glycol ethyl ether, triethylene glycol ethyl ether, ethylene glycol monopropyl ether, diethylene glycol monopropyl ether, triethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, diethylene glycol monohexyl ether, and triethylene glycol monohexyl ether. More preferably, the alcohol compound may be at least one selected from the group consisting of pentanol, hexanol, heptanol, octanol, and decanol.

[0116] The cleaning solution (160) may contain acetone in an amount of 10 to 40 wt%, or 20 to 30 wt%, or 30 wt%, based on the total weight of the cleaning solution. Similarly, the cleaning solution may contain water in an amount of 60 to 90 wt%, or 70 to 80 wt%, or 70 wt%, based on the total weight of the cleaning solution.

[0117] Meanwhile, the embodiments described above in FIGS. 2 to 13 may be implemented separately, but may also be implemented in various combinations. In addition, the rolling roll (10) may be provided as a pair of rolls (10) facing each other, and accordingly, at least one rolling roll cleaning device (100) may be provided for each rolling roll (10).

[0118] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0119] [Explanation of symbols]

[0120] 10: Rolling roll

[0121] 100: Rolling roll cleaning device

[0122] 110: Absence of cleaning

[0123] 111: Body

[0124] 112: Cleaning solution supply hole

[0125] 113: Shaft

[0126] 114: Absence of support

[0127] 115: Inlet

[0128] 120: Cleaning cloth

[0129] 130: Detergent supply unit

[0130] 140: Cleaning cloth supply section

[0131] 150: Washing cloth recovery unit

[0132] 160: Detergent

[0133] 170: Housing

[0134] 180: Sensing unit

[0135] 190a: Inspection unit

[0136] 190b: Drying unit

Claims

1. In a device for cleaning a rolling roll for rolling an electrode, A cleaning member that brings a cleaning cloth into contact with the surface of the above rolling roll; and Including a cleaning cloth that cleans the rolling roll while passing between the rolling roll and the cleaning member, The above cleaning member is a rolling roll cleaning device capable of supplying a cleaning liquid to the cleaning cloth.

2. In paragraph 1, The above cleaning member: The main body with which the above cleaning cloth comes into contact; and A rolling roll cleaning device comprising a cleaning solution supply hole provided on the surface of the main body and capable of supplying the cleaning solution.

3. In paragraph 2, The above cleaning solution supply holes are provided in multiple numbers, A rolling roll cleaning device, wherein the plurality of cleaning liquid supply holes are arranged along the width direction of the cleaning member in a portion of the cleaning member.

4. In paragraph 3, A rolling roll cleaning device, wherein each of the plurality of cleaning liquid supply holes is arranged at a predetermined, constant interval.

5. In paragraph 3, A rolling roll cleaning device, wherein the plurality of cleaning liquid supply holes are arranged in a row along the width direction of the cleaning member.

6. In paragraph 1, It further includes a cleaning solution supply unit that directly supplies the cleaning solution to the cleaning cloth, A rolling roll cleaning device, wherein the cleaning solution supply unit is arranged at the front end of the cleaning member based on the direction of travel of the cleaning cloth, and supplies the cleaning solution to the cleaning cloth from at least one of the cleaning member and the cleaning solution supply unit.

7. In paragraph 6, A rolling roll cleaning device that supplies the cleaning solution to the cleaning cloth from the cleaning solution supply unit and replenishes the cleaning solution to the cleaning cloth from the cleaning member.

8. In paragraph 7, During the operation period of the above rolling roll, the above cleaning liquid is supplied from the above cleaning liquid supply unit, A rolling roll cleaning device that supplies the cleaning liquid from the cleaning member to the cleaning cloth for a predetermined period of time immediately after the operation of the rolling roll is stopped and then resumed.

9. In paragraph 6, A rolling roll cleaning device, wherein the cleaning liquid supplied from the cleaning liquid supply unit to the cleaning cloth and the cleaning liquid supplied from the cleaning member to the cleaning cloth are of the same type or composition.

10. In paragraph 6, A rolling roll cleaning device, wherein the cleaning liquid supplied from the cleaning liquid supply unit to the cleaning cloth and the cleaning liquid supplied from the cleaning member to the cleaning cloth are of different types or components.

11. In paragraph 6, A rolling roll cleaning device, wherein the cleaning solution supply unit includes a nozzle that sprays the cleaning solution onto the cleaning cloth, and sprays the cleaning solution onto a surface opposite to the surface of the cleaning cloth facing the rolling roll.

12. In paragraph 11, A rolling roll cleaning device, wherein the nozzle for spraying the cleaning liquid includes a fluid nozzle.

13. In paragraph 11, A rolling roll cleaning device including a suction unit for sucking cleaning liquid supplied from the cleaning liquid supply unit and flying on the opposite side of the cleaning liquid supply unit based on the cleaning cloth.

14. In paragraph 13, Further comprising a housing that houses the cleaning solution supply unit inside, A rolling roll cleaning device in which the cleaning cloth passes through the housing and the suction unit is provided in the housing.

15. In paragraph 1, A rolling roll cleaning device comprising a cleaning liquid receiving portion capable of receiving the cleaning liquid inside the cleaning member.

16. In paragraph 15, The above cleaning member further includes an inlet through which the cleaning liquid flows in, A rolling roll cleaning device in which a pipe or tube is connected to the inlet port to supply the cleaning liquid into the interior of the cleaning member.

17. In paragraph 1, A cleaning cloth supply unit for supplying the cleaning cloth; and A rolling roll cleaning device further comprising a cleaning cloth recovery unit for recovering the cleaning cloth.

18. In paragraph 17, The above cleaning cloth supply unit unwinds a cleaning cloth wound in a roll type, The above cleaning cloth recovery unit is a rolling roll cleaning device that winds up the cleaning cloth that has passed through the cleaning member.

19. In paragraph 18, Further comprising a housing for storing components of the above rolling roll cleaning device, The surface of the housing facing the rolling roll includes an opening, A rolling roll cleaning device in which the cleaning cloth is exposed through the opening and comes into contact with the rolling roll.

20. In paragraph 1, A rolling roll cleaning device further comprising a sensing unit that senses the degree of inclination of the cleaning member or the degree of deflection of the cleaning cloth passing over the cleaning member.

Images