KR102572020B1 - Cleaning device for manufacturing secondary device - Google Patents

Abstract

The present invention relates to a cleaning device for manufacturing a secondary battery for removing foreign substances attached to a pressure roller of a roll press device for adhering an electrode active material layer formed on one surface of an electrode current collector to the electrode current collector, a cleaning unit having a cleaning nozzle configured to spray cleaning particles toward a predetermined cleaning surface of a pressure roller to remove the foreign substances; and a suction unit for suctioning and removing foreign matter particles separated from the cleaning surface.

Description

Cleaning device for manufacturing secondary batteries {Cleaning device for manufacturing secondary device}

The present invention relates to a cleaning device for manufacturing secondary batteries for manufacturing secondary batteries.

In recent years, as the demand for portable electronic products such as laptop computers, video cameras, and mobile phones has rapidly increased, and the development of electric vehicles, batteries for energy storage, robots, and satellites has been in full swing, high-performance secondary batteries that can be repeatedly charged and discharged Research on this is actively progressing.

Such a secondary battery includes an electrode assembly in which a plurality of electrodes and a plurality of separators are alternately disposed, and an exterior material that seals and houses the electrode assembly together with an electrolyte, that is, a battery case. In addition, the electrode includes an electrode current collector and an electrode active material layer made of an electrode active material coated on one surface of the electrode current collector.

In general, the electrode active material layer is formed through a coating process of forming an electrode active material layer by applying an electrode active material slurry on one surface of an electrode current collector using a slot die coater, and a rolling process of rolling an electrode having the electrode active material layer formed thereon. In particular, the rolling process is performed using a heating plate supporting the electrode and a pressing roller that presses the electrode while the electrode is supported by the heating plate to adhere the electrode active material layer to the current collector. However, the electrode active material and other foreign substances may adhere to the contact surface of the pressure roller in contact with the electrode active material layer. Accordingly, in the prior art, there has been a problem that the shape of the electrode active material layer becomes non-uniform due to the foreign matter attached to the pressure roller, such as the external appearance of the foreign matter attached to the pressure roller being transferred to the electrode active material layer as it is, forming a step in the electrode active material layer.

Meanwhile, out of the entire area of the electrode current collector, an area exposed to the outside because the electrode active material is not applied is referred to as a non-coated area. Forming the electrode tab by shearing the uncoated portion, particularly, the widthwise end of the electrode current collector, is called a notching process.

This notching process is performed using a lower mold supporting the electrode current collector and an upper mold equipped with a cutter for forming an electrode tab by shearing the uncoated portion of the electrode current collector. However, in general, the electrode tab is formed by shearing together the uncoated portion and a partial region of the electrode active material layer adjacent to the uncoated portion. As a result, when forming the electrode tab, the electrode active material and other foreign substances adhere to the contact surface of the cutter that comes into contact with the uncoated portion or the electrode active material layer. Accordingly, in the related art, there has been a problem that the front end surface of the electrode tab is contaminated or the shape of the electrode tab is uneven due to foreign substances attached to the contact surface of the cutter.

An object of the present invention is to provide a cleaning device for manufacturing a secondary battery having an improved structure so as to be able to clean a pressure roller used in an electrode rolling process.

Furthermore, an object of the present invention is to provide a cleaning device for manufacturing a secondary battery having an improved structure to enable cleaning of a cutter used in a notching process of an electrode.

The present invention for solving the above problems is a cleaning device for manufacturing a secondary battery according to a preferred embodiment, the foreign matter attached to the pressure roller of the roll press device for adhering the electrode active material layer formed on one surface of the electrode current collector to the electrode current collector A cleaning apparatus for manufacturing a secondary battery for removing, comprising: a cleaning unit having a cleaning nozzle configured to spray sublimable solid cleaning particles toward a predetermined cleaning surface of a pressure roller to remove foreign substances; and a suction unit for suctioning and removing foreign matter particles separated from the cleaning surface.

A cleaning device for manufacturing a secondary battery according to another preferred embodiment of the present invention for solving the above problems is a secondary battery for removing foreign substances attached to a cutter of a notching device for forming an electrode tab by shearing a non-coated portion of an electrode current collector. A cleaning apparatus for manufacturing use, comprising: a cleaning unit having a cleaning nozzle configured to spray sublimable solid cleaning particles toward a predetermined cleaning surface of a cutter to remove foreign substances; a suction for suctioning and removing foreign matter particles separated from the cleaning surface; and a conveying unit reciprocally conveying the cleaning unit and the suction to enter into or withdraw from the gap between the cutter and the uncoated portion.

The present invention relates to a cleaning apparatus for manufacturing a secondary battery, and has the following effects.

First, the present invention can clean the cleaning surface of the pressure roller of the roll press device for performing the rolling process of the electrode during the manufacturing process of the secondary battery using dry ice microparticles and other sublimable solid cleaning particles. there is. According to the present invention, damage to the pressure roller can be minimized compared to a conventional cleaning device that physically scrapes the cleaning surface of the pressure roller using a cleaning member to clean it or treats it with a chemical substance to clean it, and it is possible to minimize moisture, oil, and other Various kinds of foreign substances can be easily removed from the pressure roller.

Second, in the present invention, the cutter of the notching device for performing the notching process of the electrode during the manufacturing process of the secondary battery can be cleaned using fine dry ice particles and other solid-phase cleaning particles having sublimation properties. According to the present invention, it is possible to minimize damage to the cutter compared to the conventional cleaning apparatus in which the cleaning surface of the cutter is physically scraped using a cleaning member to clean or treated with a chemical substance to clean, and various types of water, oil, and other types foreign matter can be easily removed from the cutter.

Thirdly, in the present invention, the cleaning surface of the cutter can be cleaned by entering the cleaning nozzle into the narrow gap between the cutter and the electrode fabric. According to the present invention, compared to the conventional cleaning method in which cleaning is performed after separating the cutter from the upper mold, the time required for separation and reassembly of the cutter can be reduced, and in the process of separation and reassembly of the cutter, the cutter It can be prevented from being installed incorrectly or damaged.

1 is a view showing a schematic configuration of a cleaning apparatus for manufacturing a secondary battery according to a first embodiment of the present invention.
2 is a view showing a state in which an electrode active material layer is formed on the electrode current collector fabric shown in FIG. 1;
3 is a view showing a state in which foreign substances are attached to the outer surface of the pressure roller shown in FIG. 1;
Fig. 4 is a front view of the notching device;
Fig. 5 is a side view of the notching device shown in Fig. 4;
6 is a plan view illustrating a positional relationship between a cleaning device for manufacturing a secondary battery and a notching device according to a second embodiment of the present invention;
7 and 8 are views for explaining an operating state of the cleaning device for manufacturing a secondary battery shown in FIG. 6;

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

1 is a view showing a schematic configuration of a cleaning apparatus for manufacturing a secondary battery according to a first embodiment of the present invention, and FIG. 2 is a view showing a state in which an electrode active material layer is formed on an electrode current collector fabric shown in FIG. 1, 3 is a view showing a state in which foreign substances are attached to the outer surface of the pressure roller shown in FIG. 1;

The cleaning device 100 for manufacturing a secondary battery according to the first embodiment of the present invention is a device for cleaning a pressure roller 340 provided in a roll press device used in a rolling process of an electrode during a manufacturing process of a secondary battery.

The rolling process of the electrode refers to a process of rolling the electrode active material layer (A) formed on one surface of the electrode current collector fabric (C) in the coating process and adhering it to the electrode current collector fabric (C).

As shown in FIG. 1, the coating process and the rolling process are generally performed through a roll-to-roll method.

First, as shown in FIGS. 1, 2 (a) and 2 (b), in the coating process, the guide roller 360 is unwound from the unwinder 310 using the slot die coater 320 An electrode active material layer (A) is formed by applying the electrode active material slurry to one surface of the electrode current collector fabric (C) which is guided by and supplied to the installation position (Y) of the slot die coater 320. Here, the position (X) is a position between the installation position of the unwinder 310 and the installation position of the slot die coater 320. Referring to FIG. 2(a) , the electrode current collector fabric passing through this position (X) is still coated with the electrode active material slurry.

Next, as shown in FIGS. 1, 2(b) and 2(c), in the rolling process, a slot die coater ( 320) and then guided by the guide roller 360 and delivered to the installation position Z of the pressure roller 340 while supporting the electrode current collector fabric C, the electrode using the pressure roller 340 The electrode active material layer (A) is adhered to the electrode current collector fabric (C) by pressing the active material layer (A). The electrode current collector fabric (C) to which the electrode active material layer (A1) has been rolled through the rolling process may be wound around the rewinder 350 under the guidance of the guide roller 360 and recovered.

As shown in FIGS. 1 and 3, in the course of the rolling process (① -> ④), the contact surface of the pressure roller 340 in contact with the electrode active material layer (A), the electrode active material, moisture, and other foreign substances (P) may be attached. In order to solve this problem, the cleaning device 100 for manufacturing secondary batteries is provided to be able to remove foreign substances P attached to the contact surface of the pressure roller 340 in the rolling process.

The structure of the cleaning device 100 for producing a secondary battery is not particularly limited. For example, the cleaning apparatus 100 for manufacturing a secondary battery includes a cleaning unit 110 that cleans a predetermined cleaning surface of a pressure roller 340 using sublimable solid cleaning particles W, and a pressure roller ( The inonizer 120 radiates ions I toward the cleaning surface of 340) to neutralize the cleaned surface charged by the cleaning particles W, and foreign substances separated from the cleaning surface by the cleaning particles W It may include a suction 130 for collecting and inhaling the particles of P). The cleaning surface of the pressure roller 340 is preferably a contact surface of the pressure roller 340 described above, but is not limited thereto. For example, the cleaning surface of the pressure roller 340 may include an adjacent area in addition to the contact surface of the pressure roller 340 described above.

The structure of the cleaning unit 110 is not particularly limited. For example, the cleaning unit 110 includes a cleaning particle supply source (not shown) for supplying cleaning particles W, a carrier gas supply source (not shown) for supplying a carrier gas G, and a cleaning particle supply source. A cleaning nozzle 112 that mixes the cleaned particles W and the carrier gas G supplied from a carrier gas supply source and sprays them toward the cleaning surface of the pressure roller 340 may be provided.

The cleaning material usable as the cleaning particles W preferably has sublimation properties. For example, the cleaning particles W may be composed of C0 ₂ . It is preferable that the cleaning particle supply source supplies liquid cleaning material, that is, liquid C0 ₂ to the cleaning nozzle 112 , but is not limited thereto.

The type of gas usable as the carrier gas G is not particularly limited. For example, the carrier gas (G) may be high-purity air or nitrogen (N0 ₂ ). The carrier gas supply source pressurizes the carrier gas G to a predetermined standard pressure (eg, 6 bar) or more, and supplies the carrier gas G to the cleaning nozzle 112 .

The cleaning nozzle 112 is provided to mix a liquid cleaning material supplied from a cleaning particle supply source and a carrier gas G supplied from a carrier gas supply source and spray it toward the cleaning surface, wherein the liquid cleaning material is used as a solid cleaning material. It is provided to reach the cleaning surface in a phase-transformed state into particles (W).

In general, in the case of a material having sublimation properties, such as C0 ₂ , when exposed to the air for a predetermined time or longer in a liquid state, it undergoes a phase transition to a solid phase and then sublimes into a gas phase. Accordingly, the cleaning nozzle 112 is located at a position spaced apart from the cleaning surface by a predetermined distance so that the liquid cleaning material sprayed from the cleaning nozzle 112 is phase-transformed into solid cleaning particles W in the process of reaching the cleaning surface. It is installed to be able to spray the cleaning material in. For example, when the cleaning material is C0 ₂ , the cleaning nozzle 112 converts the liquid C0 ₂ sprayed from the cleaning nozzle 112 into dry ice fine particles (snow & pellets) in the process of reaching the cleaning surface. It may be installed to spray the cleaning material at a location spaced apart from the cleaning surface by a predetermined distance so that the phase is changed. To this end, the cleaning apparatus 100 for manufacturing a secondary battery may further include a nozzle transfer unit (not shown) capable of reciprocally transporting the cleaning nozzle 112 to be close to or away from the pressure roller 340. there is.

The cleaning timing and cleaning position of the pressure roller 340 using the cleaning unit 110 are not particularly limited. For example, as shown in FIG. 1 , the cleaning nozzle 112 is disposed at an initial position (①) so as to be spaced apart from the electrode active material layer (A) adhered to the electrode current collector fabric (C) by a predetermined distance or more. The solid cleaning particles W may be sprayed toward the cleaning surface of the pressure roller 340 . When the cleaning particles W are sprayed, the pressure roller 340 is preferably driven to rotate so that the cleaning particles W can be evenly sprayed over the entire area of the cleaning surface, but is not limited thereto.

Hereinafter, the cleaning surface of the pressure roller 340 is cleaned by the cleaning particles W by taking a case where the cleaning material is CO ₂ and the solid cleaning particles W are dry ice fine particles. do it with

The dry ice microparticles reaching the cleaning surface under the guidance of the high-speed and high-pressure carrier gas G collide with the foreign matter P attached to the pressure roller 340, and apply a physical impact force to the foreign matter. Due to this, foreign substances attached to the pressure roller 340 are separated from the cleaning surface. In addition, when the dry ice fine particles collide with the cleaning surface, the foreign matter is cooled and contracted due to the thermal shock caused by the low-temperature airflow, causing cracks in the foreign matter, and the dry ice fine particles sublimate and significantly expand in volume, resulting in foreign matter ( P) is peeled off from the cleaning surface. In addition, the organic matter included in the foreign material P is dissolved and removed by dry ice, and the water contained in the foreign material is frozen by dry ice and phase-transformed into a solid phase, and then sublimated and removed.

Through this process, the dry ice microparticles can clean the cleaning surface of the pressure roller 340 by removing the electrode active material, moisture, oil, and other foreign substances (P) attached to the cleaning surface of the pressure roller 340. .

When the size of the dry ice fine particles sprayed from the cleaning nozzle 112 becomes larger than an appropriate level, the moisture contained in the foreign matter P attached to the cleaning surface cannot be quickly sublimated due to the energy transferred from the dry ice fine particles. There is a possibility that it will remain for a predetermined time or more in liquid form. Accordingly, the cleaning nozzle 112 is preferably provided so that the dry ice microparticles have a diameter equal to or less than a predetermined reference size.

The inonizer 120 is installed to emit ions (I) such as positive ions/anions toward the cleaning surface. The installation position of the inonizer 120 is not particularly limited. For example, as shown in FIG. 1, the inonizer 120 may be installed to be spaced apart from the cleaning nozzle 112 by a predetermined angular distance with the pressure roller 340 disposed at the initial position ① as the center. there is. In addition, the cleaning apparatus 100 for manufacturing a secondary battery may further include an ionizer transfer unit (not shown) capable of reciprocally transporting the inonizer 120 so as to move the inonizer 120 closer to or away from the pressure roller 340. there is.

When the dry ice fine particles collide with the cleaning surface, the cleaning surface can be progressively charged. As such, when the cleaning surface is charged by the dry ice microparticles, particles of the foreign matter (P) separated from the cleaning surface are reattached to the cleaning surface by static electricity, so the removal efficiency of the foreign matter (P) using the dry ice microparticles is reduced. There are concerns. However, when the ions (I) emitted by the inonizer 120 come into contact with the cleaning surface, the cleaning surface is neutralized. Through this, the inonizer 120 causes the foreign matter P to be reattached to the cleaning surface due to static electricity. that can be prevented

The suction 130 is provided to recover particles of the foreign matter P separated from the cleaning surface of the pressure roller 340 by vacuum suction using negative pressure applied from the outside through a suction pipe (not shown). The installation position of the suction 130 is not particularly limited. For example, as shown in FIG. 1 , the suction 130 may be installed to be spaced apart from the cleaning nozzle 112 by a predetermined angular distance with the pressure roller 340 disposed at the initial position ① as the center. . In addition, the cleaning apparatus 100 for manufacturing a secondary battery may further include a suction transport unit (not shown) capable of reciprocally transporting the suction 130 so as to move the suction 130 closer to or away from the pressure roller 340 .

As described above, the cleaning device 100 for manufacturing a secondary battery is a roll press device for performing an electrode rolling process during a manufacturing process of a secondary battery using dry ice fine particles and other solid-phase cleaning particles W having sublimation properties. The cleaning surface of the pressure roller 340 can be cleaned. In this way, when the cleaning surface of the pressure roller 340 is cleaned using the solid cleaning particles W having sublimation properties, the cleaning surface of the pressure roller 340 is physically scraped off using a cleaning member to be cleaned or treated with a chemical material. Compared to conventional cleaning devices that clean, damage to the pressure roller 340 can be minimized, and electrode active materials, moisture, oil, and various other foreign substances P can be easily removed from the pressure roller 340.

4 is a front view of a notching device, FIG. 5 is a side view of the notching device shown in FIG. 4, and FIG. 6 is a plan view showing the positional relationship between a cleaning device for manufacturing a secondary battery and a notching device according to a second embodiment of the present invention. , 7 and 8 are diagrams for explaining an operating state of the cleaning apparatus for manufacturing a secondary battery shown in FIG. 6 .

The cleaning device 200 for manufacturing a secondary battery according to the second embodiment of the present invention is a device for cleaning a cutter 382 provided in a notching device 370 used in a notching process during a manufacturing process of a secondary battery.

The notching process refers to a process of shearing the uncoated portion C2 of the electrode current collector C1 using the cutter 382 of the notching device 370 to form an electrode tab.

4 and 5, the notching device 370 has at least one cutter 382 that presses and shears the uncoated portion C2 of the electrode current collector C1 to form an electrode tab, An upper mold 380 installed on the upper side of the electrode fabric F, and an upper mold transfer unit (not shown) that reciprocates the upper mold 380 to be close to or away from the electrode fabric F And, having at least one insertion groove 392 concavely formed so that any one of the cutter 382 shearing the uncoated portion C2 is inserted, and supporting the electrode fabric F, on the lower side of the electrode fabric F A lower mold 390 is installed, a lower mold transport unit (not shown) for reciprocating and transporting the lower mold 390 to be close to or away from the electrode fabric F, and the upper mold 380 A linear bushing 400 guiding transfer of each lower mold 390 may be included. Here, the electrode fabric F refers to a composite of an electrode current collector C1 and an electrode active material layer A2 formed on one surface of the electrode current collector C1.

As shown in FIG. 6, according to the notching device 370 described above, in a state in which the electrode raw material F is supported using the lower mold 390, the cutter 382 of the upper mold 380 is used to collect the electrode. An electrode tab may be formed by pressing and shearing the uncoated portion C2 of the entire C1 and one region of the electrode active material layer A2 adjacent to the uncoated portion C2. In the process of forming the electrode tab using the cutter 382, the electrode active material, moisture, oil, and other foreign substances may adhere to the contact surface of the cutter 382 that is in contact with the uncoated portion C2 and the electrode active material layer A. can In order to solve this problem, the cleaning device 200 for manufacturing a secondary battery is provided to be able to remove foreign substances attached to the contact surface of the cutter 382 in the notching process.

The structure of the cleaning device 200 for producing a secondary battery is not particularly limited. For example, as shown in FIGS. 6 and 7 , the cleaning apparatus 200 for manufacturing a secondary battery cleans a predetermined cleaning surface of the cutter 382 using sublimable solid cleaning particles W. The cleaning unit 210, the inonizer 220 for emitting ions I toward the cleaning surface of the cutter 382 to neutralize the cleaning surface charged by the cleaning particles W, and the cleaning particles W It may include a suction 230 for suctioning and recovering particles of foreign matter separated from the cleaning surface by the. The cleaning surface of the cutter 382 is preferably a contact surface of the cutter 382 described above, but is not limited thereto. For example, the cleaning surface of the cutter 382 may include an adjacent area in addition to the contact surface of the cutter 382 described above.

The structure of the cleaning unit 210 is not particularly limited. For example, the cleaning unit 210 may include a cleaning particle supply source (not shown), a carrier gas supply source (not shown), and a cleaning nozzle 212 .

The cleaning material usable as the cleaning particle W, the gas usable as the carrier gas G, and the structure of the cleaning nozzle 212 are the same as or similar to those of the above-described cleaning device 100 for manufacturing a secondary battery, A description thereof will be omitted.

The installation position of the cleaning nozzle 212 is not particularly limited. For example, the cleaning nozzle 212 is a suction 230 by a suction transfer unit 240, which will be described later, and the cleaning nozzle 212 and the inonizer 220 fixed thereto are connected to the cutter 382 and the electrode fabric (F ) may be fixed to a predetermined position inside the suction 230 so that the cleaning particles W may be sprayed toward the cleaning surface of the cutter 382 when entering the gap between the suction cups 230 .

As shown in Figure 6, each cutter 382 is provided to extend as long as a predetermined length along the moving direction of the fabric. In addition, at least one of the cutters 382 is provided to have a bending section corresponding to the shape of the electrode tab. Here, the moving direction of the fabric is preferably the longitudinal direction of the electrode fabric (F). In this case, the notching device 370 may further include an electrode transfer unit (not shown) for transferring the electrode fabric F in the longitudinal direction. Then, when the electrode tab is formed in a predetermined section of the uncoated portion C2, the electrode transfer unit transfers the electrode fabric F by a predetermined pitch interval along the moving direction to the uncoated portion to form a new electrode tab ( A section of C2) may enter the notching device 370.

As described above, when the cutter 382 is provided to extend along the moving direction of the fabric, the cleaning unit 210 has the same length as the cutter 382 or longer than the cutter 382 by a predetermined ratio of the fabric. It is preferable to be provided so as to elongate along the moving direction.

The installation position of the inonizer 220 is not particularly limited. For example, as shown in FIG. 6, in the inonizer 220, the suction 230, the cleaning nozzle 212 fixed thereto, and the inonizer 220 are provided by the suction transfer unit 240, which will be described later. Suction 230 to spray ions I toward the cleaning surface of cutter 382 through at least one ion spinneret 222 when entering the gap between 382 and electrode fabric F It may be fixedly installed at a predetermined location inside. In addition, the inonizer 220 is preferably provided so as to extend along the moving direction of the fabric by a length equal to or longer than the cutter 382 by a predetermined ratio compared to the cutter 382 .

The installation position of the suction 230 is not particularly limited. For example, as shown in FIG. 6 , the suction 230 may be installed to be spaced apart from the notching device 370 by a predetermined distance in a vertical direction of the moving direction of the fabric, that is, in the width direction of the fabric. In addition, the suction 230 has a tray shape that is open toward the cleaning surface of the cutter 382, and has a predetermined shape so that the cleaning nozzle 212 and the inonizer 220 can be fixedly installed inside the suction 230, respectively. has a width and a length.

The cleaning device 200 for manufacturing a secondary battery is such that the suction 230 and the cleaning nozzle 212 and the inonizer 220 fixed thereto enter the gap between the cutter 382 and the electrode fabric F, or A suction transfer unit 240 capable of reciprocating transfer of the suction 230 in the width direction of the fabric may be further included so as to be drawn out from the gap. In this case, as shown in FIG. 7 , the cleaning nozzle 212 is installed so as to be located at an end spaced apart from the notching device 370 among both ends of the inside of the suction 230, toward the notching device 370. It may be installed so as to be inclined toward the direction. Also, as shown in FIG. 7 , the inonizer 220 may be installed closer to the notching device 370 than the cleaning nozzle 212 .

The structure of the suction transfer unit 240 is not particularly limited. For example, the suction transfer unit 240 may include at least one cylinder member 242 capable of reciprocating and transferring the suction 230 in the width direction of the original fabric.

A method of cleaning the cleaning surface of the cutter 382 using the cleaning device 200 for manufacturing a secondary battery is not particularly limited. For example, as shown in FIGS. 7 and 8 , the suction 230 and the like are introduced into the gap between the cutter 382 and the electrode fabric F by using the suction transport unit 240 for each predetermined cleaning period. In addition, the cleaning unit 210, the inonizer 220, and the suction 230 may be driven respectively. Then, the cleaning surfaces of the cutters 382 can be sequentially cleaned using the cleaning particles W sprayed from the cleaning nozzle 212, and the cutters 382 can be cleaned using the ions I emitted from the inonizer 220. The cleaning surface of 382) may be sequentially neutralized, and foreign matter particles separated from the cutters 382 may be sequentially suctioned and recovered using the suction 230.

Meanwhile, the suction transport unit 240 has been described as transporting the suction 230 and the like along the width direction of the fabric, but is not limited thereto. That is, the suction transfer unit 240 transfers the suction 230 in the moving direction of the fabric, that is, in the longitudinal direction of the fabric, so that the suction 230 enters the gap between the cutter 382 and the electrode fabric F. provision may be made to allow or withdraw from such gaps.

As described above, the cleaning device 200 for manufacturing a secondary battery is a notching device for performing a notching process of an electrode during a manufacturing process of a secondary battery using dry ice fine particles and other solid-phase cleaning particles W having sublimation properties ( The cleaning surface of the cutter 382 of 370 can be cleaned. When the cleaning surface of the cutter 382 is cleaned using the solid cleaning particles W having sublimation properties, the cleaning surface of the cutter 382 is physically scraped and cleaned using a cleaning member, or cleaned by treatment with a chemical substance. Compared to conventional cleaning devices, damage to the cutter 382 can be minimized, and moisture, oil, and various other foreign substances can be easily removed from the cutter 382 .

In addition, according to the cleaning device 200 for manufacturing a secondary battery, the cleaning nozzle 212 may enter the narrow gap between the cutter 382 and the electrode fabric F to clean the cleaning surface of the cutter 382 . Therefore, when the cleaning device 200 for manufacturing a secondary battery is used, compared to the conventional cleaning method in which the cleaning surface of the cutter 382 is cleaned after separating the cutter 382 from the upper mold 380, the cutter 382 It is possible to reduce the time required for separation and reassembly, and it is possible to prevent the cutter 382 from being erroneously installed or damaged during the separation and reassembly of the cutter 382 .

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: cleaning device for manufacturing secondary batteries
110: cleaning unit
112: cleaning nozzle
120: ionizer
130: suction
200: cleaning device for manufacturing secondary batteries
210: cleaning unit
212: cleaning nozzle
220: ionizer
222: ion spinneret
230: suction
240: suction transfer unit
242: cylinder member
310: unwinder
320: slot die coater
330: heating plate
340: pressure roller
350: Rewinder
360: guide roller
370: notching device
380: upper mold
382: cutter
390: lower mold
392: insertion groove
400: Linear Bushing
F: electrode fabric
C: electrode current collector fabric
C1: electrode current collector
C2: Uncoated region
A: electrode active material layer
A1: electrode active material layer
A2: electrode active material layer
P: foreign matter
W: cleaning particles
G: carrier gas
I: Ion

Claims (15)

A cleaning device for manufacturing a secondary battery for cleaning a pressure roller provided in a roll press device so as to move along the electrode active material layer formed on one surface of the electrode current collector and press the electrode active material layer to a circumferential surface so that the electrode active material layer is adhered to one surface of the electrode current collector. in
When the pressure roller is disposed at an initial position determined to be spaced apart from the electrode active material layer by a predetermined distance or more, it is installed to selectively face the circumferential surface, and sprays a cleaning material toward the circumferential surface to adhere to the circumferential surface. a cleaning unit having a cleaning nozzle for removing foreign substances; and
When the pressure roller is disposed at the initial position, it selectively faces the circumferential surface, but is installed so as to be spaced apart from the cleaning nozzle by a predetermined angular distance based on the pressure roller, and removes particles of foreign matter separated from the circumferential surface. Including suction to remove by suction,
The cleaning nozzle is configured at a predetermined distance from the circumferential surface so that the liquid cleaning material sprayed toward the circumferential surface changes into sublimable solid cleaning particles and collides with the circumferential surface while reaching the circumferential surface. installed at a distance of
The cleaning material is carbon dioxide, the solid cleaning particles are dry ice microparticles,
wherein the cleaning nozzle and the suction are driven while the pressure roller is being rotated while being fixedly disposed at the initial position. According to claim 1,
wherein the cleaning nozzle mixes a carrier gas supplied from an external gas supply source with the cleaning material and sprays it toward the circumferential surface. delete delete delete delete According to claim 1,
The cleaning unit is installed to selectively face the circumferential surface when the pressure roller is disposed at the initial position, but is spaced apart from each of the cleaning nozzle and the suction by a predetermined angular distance based on the pressure roller. and an ionizer for radiating ions toward the circumferential surface to neutralize the circumferential surface charged by the solid cleaning particles. delete delete delete delete delete delete delete delete

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