KR20210039319A - Cleaning device for manufacturing secondary device - Google Patents

Abstract

The present invention relates to a cleaning device for manufacturing a secondary battery, which can remove a foreign material attached to a pressurizing roller of a roll press device which allows an electrode active material layer formed on one surface of an electrode collector to adhere to the electrode collector. The cleaning device for manufacturing a secondary battery comprises: a cleaning unit having a cleaning nozzle configured to spray a solid cleaning particle with a sublimation property toward a predetermined cleaning surface of the pressurizing roller so as to remove the foreign material; and a suction configured to suction and remove particles of the foreign material separated from the cleaning surface.

Description

Cleaning device for manufacturing secondary battery TECHNICAL FIELD

The present invention relates to a cleaning apparatus for manufacturing a secondary battery for manufacturing a secondary battery.

In recent years, as the demand for portable electronic products such as laptops, video cameras, and portable telephones has increased rapidly, and development of electric vehicles, energy storage batteries, robots, satellites, etc. is in full swing, high-performance secondary batteries capable of repetitive charging and discharging Research on is being actively conducted.

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 accommodates the electrode assembly together with an electrolyte solution, that is, a battery case. Further, the electrode includes an electrode current collector and an electrode active material layer made of an electrode active material applied to one surface of the electrode current collector.

In general, the electrode active material layer includes a coating process of forming an electrode active material layer by coating 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 on which the electrode active material layer is formed. In particular, the rolling process proceeds 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 electrode current collector. However, the electrode active material and other foreign substances may be attached to the contact surface of the pressure roller in contact with the electrode active material layer. Thus, in the related art, there is a problem in that the shape of the electrode active material layer becomes uneven due to the foreign material attached to the pressure roller, such as the external shape of the foreign material attached to the pressure roller is transferred to the electrode active material layer as it is to form a step in the electrode active material layer.

On the other hand, out of the entire area of the electrode current collector, the area of the electrode active material exposed to the outside is referred to as the uncoated area. This uncoated portion, in particular, shearing the end portion in the width direction of the electrode current collector to form an electrode tab is referred to as a notching process.

This notching process is performed using a lower mold for supporting the electrode current collector, and an upper mold provided with a cutter for forming electrode tabs by shearing the uncoated portion of the electrode current collector. However, in general, the electrode tab is formed by shearing the uncoated portion and a partial region of the electrode active material layer adjacent to the uncoated portion. For this reason, the electrode active material and other foreign matter adhere to the contact surface of the cutter that is in contact with the uncoated portion or the electrode active material layer when the electrode tab is formed. Accordingly, conventionally, there is a problem in that the front end surface of the electrode tab is contaminated or the shape of the electrode tab becomes uneven due to foreign matter attached to the contact surface of the cutter.

An object of the present invention is to provide a cleaning apparatus for manufacturing a secondary battery having an improved structure so as to be able to clean a pressure roller used in a rolling process of an electrode, in order to solve the problems of the prior art described above.

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

The present invention for solving the above-described problem is a cleaning device for manufacturing a secondary battery according to a preferred embodiment, the electrode active material layer formed on one side of the electrode current collector is adhered to the pressure roller of the roll press device A cleaning apparatus for manufacturing a secondary battery for removal, comprising: a cleaning unit including a cleaning nozzle for removing foreign substances by spraying solid cleaning particles having sublimation properties toward a predetermined cleaning surface of a pressure roller; And suction for sucking and removing particles of foreign matter separated from the cleaning surface.

A cleaning apparatus for manufacturing a secondary battery according to another preferred embodiment of the present invention for solving the above-described problems is a secondary battery for removing foreign substances attached to a cutter of a notching device for forming an electrode tab by shearing the uncoated portion of an electrode current collector. A cleaning apparatus for manufacturing, comprising: a cleaning unit including a cleaning nozzle for removing foreign substances by spraying solid cleaning particles having sublimation properties toward a predetermined cleaning surface of a cutter; Suction for sucking and removing particles of foreign matter separated from the cleaning surface; And a transfer unit reciprocating and transferring the cleaning unit and the suction to enter or withdraw from the gap between the cutter and the uncoated part.

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 electrode rolling process during the manufacturing process of the secondary battery by using dry ice fine particles and other solid cleaning particles having sublimation properties. have. 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 treat it with a chemical substance to clean it, and moisture, oil, etc. Various kinds of foreign matter can be easily removed from the pressure roller.

Second, the present invention can clean a cutter of a notching device for performing a notching process of an electrode during a manufacturing process of a secondary battery by using fine dry ice particles and other solid cleaning particles having sublimation properties. According to the present invention, damage to the cutter can be minimized, compared to a conventional cleaning device that physically scrapes the cleaning surface of the cutter using a cleaning member to clean it or treats it with a pyrotechnic substance to clean it, and can minimize moisture, oil, and other various types. It is possible to easily remove foreign substances from the cutter.

Third, the present invention can clean the cleaning surface of the cutter by entering the cleaning nozzle into a narrow gap between the cutter and the electrode fabric. According to the present invention, compared to the conventional cleaning method in which the cutter is separated from the upper mold and then cleaned, the time required for separation and reassembly of the cutter can be reduced. It can prevent misinstallation or damage.

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.
FIG. 2 is a diagram illustrating a state in which an electrode active material layer is formed on the fabric of the electrode current collector 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.
4 is a front view of a notching device.
Figure 5 is a side view of the notching device shown in Figure 4;
6 is a plan view showing 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 apparatus 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 elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated 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 interferes with an understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), and the like may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. In addition, unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Does not.

1 is a view showing a schematic configuration of a cleaning apparatus for manufacturing a secondary battery according to a first embodiment, and FIG. 2 is a view showing a state in which an electrode active material layer is formed on the fabric of an electrode current collector 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 apparatus 100 for manufacturing a secondary battery according to the first embodiment of the present invention is an apparatus for cleaning a pressure roller 340 provided in a roll press apparatus used in a rolling process of an electrode during a manufacturing process of a secondary battery.

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

As shown in FIG. 1, in general, the coating process and the rolling process are 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 The electrode active material layer (A) is formed by applying the electrode active material slurry to one surface of the electrode current collector fabric (C) 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 in a state in which the electrode active material slurry is still applied.

Next, as shown in Figs. 1, 2(b) and 2(c), in the rolling process, using a heating plate 330 capable of applying heat to the electrode active material layer A, a slot die coater ( After passing through 320, the electrode is guided by the guide roller 360 and transferred 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 active material layer (A) is pressed to adhere the electrode active material layer (A) to the electrode current collector fabric (C). The electrode current collector fabric C to which the electrode active material layer A1 rolled through the rolling process is adhered may be wound and recovered by the rewinder 350 under the guidance of the guide roller 360.

1 and 3, in the process of performing the rolling process (①->④), the contact surface of the pressure roller 340 in contact with the electrode active material layer (A) includes electrode active material, moisture, and other foreign matter. (P) can be attached. In order to solve this, the cleaning apparatus 100 for manufacturing a secondary battery 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 apparatus 100 for manufacturing a secondary battery is not particularly limited. For example, the cleaning apparatus 100 for manufacturing a dual battery includes a cleaning unit 110 for cleaning a predetermined cleaning surface of the pressure roller 340 using solid cleaning particles W having sublimation properties, and a pressure roller ( An inonizer 120 that radiates ions (I) toward the cleaning surface of 340 to neutralize the cleaning surface charged by the cleaning particles (W), and foreign matter separated from the cleaning surface by the cleaning particles (W) ( It may include a suction 130 and the like for inhaling and recovering 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 a region adjacent thereto 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 is supplied from a cleaning particle supply source (not shown) that supplies cleaning particles W, a carrier gas supply source (not shown) that supplies a carrier gas G, and a cleaning particle supply source. A cleaning nozzle 112 or the like may be provided for mixing the cleaned particles W and the carrier gas G supplied from the carrier gas supply source and spraying them toward the cleaning surface of the pressure roller 340.

It is preferable that the cleaning material usable as the cleaning particles (W) has sublimability. For example, the cleaning particles (W) may be composed of _{C0 2.} The cleaning particle source is preferably a liquid cleaning substance, that is, a liquid C0 _2, to the cleaning nozzle 112, but is not limited thereto.

The kind of gas that can be used 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 reference pressure (eg, 6 bar) or more and supplies it to the cleaning nozzle 112.

The cleaning nozzle 112 is provided so as to be sprayable toward the cleaning surface by mixing a liquid cleaning material supplied from a cleaning particle supply source and a carrier gas G supplied from a carrier gas supply source. It is provided so as to reach the cleaning surface in a state in which the particles (W) are phase-transferred.

In general, in _{the case of a material having a sublimation property such as C0 2} , when exposed to the atmosphere in a liquid state for a predetermined period of time or longer, the material undergoes a phase transition to a solid state and then sublimes into a gas phase. Accordingly, the cleaning nozzle 112 is 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-transferred to the 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 is converted into dry ice fine particles (snow & pellet) in the process _{of the liquid C0 2 sprayed from the cleaning nozzle 112 reaching the cleaning surface.} It may be installed to be capable of spraying the cleaning material at a position spaced apart from the cleaning surface by a predetermined distance so that the phase change is performed. To this end, the cleaning apparatus 100 for manufacturing a secondary battery may further include a nozzle transfer unit (not shown) capable of reciprocating the cleaning nozzle 112 so as to be close to the pressure roller 340 or spaced apart from the pressure roller 340. have.

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 the initial position (①) so as to be spaced apart by a predetermined distance or more from the electrode active material layer (A) adhered to the electrode current collector fabric (C). It may be installed to be able to spray the solid cleaning particles (W) toward the cleaning surface of the pressure roller 340. When spraying the cleaning particles W, the pressure roller 340 is preferably rotated so that the cleaning particles W can be evenly sprayed over the entire area of the cleaning surface, but is not limited thereto.

In the following, for example, when the cleaning material is CO ₂ and the solid cleaning particles W are dry ice fine particles, the cleaning surface of the pressure roller 340 is cleaned by the cleaning particles W. It should be.

The dry ice fine particles that reach 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 matter attached to the pressure roller 340 is separated from the cleaning surface. In addition, when the dry ice fine particles collide with the cleaning surface, the foreign substances are cooled and contracted due to the thermal shock caused by the low-temperature airflow, resulting in cracks in the foreign substances, and the dry ice fine particles sublimated to remarkably expand the volume. P) is peeled off from the cleaning surface. In addition, the organic matter contained in the foreign matter P is dissolved and removed by dry ice, and the moisture contained in the foreign matter is frozen by dry ice and transferred to a solid state, and then sublimated and removed.

Through this process, the dry ice fine particles can clean the cleaning surface of the pressing roller 340 by removing electrode active material, moisture, oil, and other foreign matter P attached to the cleaning surface of the pressing 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 rapidly sublimated due to the energy transferred from the dry ice fine particles. There is a risk of remaining in a liquid state for a predetermined time or longer. Accordingly, the cleaning nozzle 112 is preferably provided so that the dry ice fine particles have a diameter less than or equal to a predetermined reference size.

The inonizer 120 is installed so that ions (I) such as positive and negative ions can be radiated 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 interval around the pressure roller 340 disposed at the initial position (①). have. In addition, the cleaning apparatus 100 for manufacturing a secondary battery may further include an ionizer transfer unit (not shown) capable of reciprocating and transporting the inonizer 120 to be close to the pressure roller 340 or spaced apart from the pressure roller 340. have.

When the dry ice fine particles collide with the cleaning surface, the cleaning surface may be gradually charged. When the cleaning surface is charged by the dry ice fine particles, the particles of the foreign matter (P) separated from the cleaning surface are reattached to the cleaning surface by static electricity, so that the removal efficiency of the foreign matter (P) using the dry ice fine particles decreases. There is a concern. 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. Can be prevented.

The suction 130 is provided to collect particles of the foreign matter P separated from the cleaning surface of the pressure roller 340 by vacuum suction using a 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 interval around the pressure roller 340 disposed at the initial position (①). . In addition, the cleaning apparatus 100 for manufacturing a secondary battery may further include a suction transfer unit (not shown) capable of reciprocating the suction 130 so as to be close to the pressure roller 340 or spaced apart from the pressure roller 340.

As described above, the cleaning device 100 for manufacturing a secondary battery uses dry ice fine particles and other solid cleaning particles (W) having sublimation properties, and is a roll press device for performing the electrode rolling process during the manufacturing process of the secondary battery. It is possible to clean the cleaning surface of the pressure roller 340 of. 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 substance. Compared to the conventional cleaning apparatus for cleaning, damage to the pressure roller 340 may be minimized, and electrode active material, moisture, oil, and various kinds of foreign matter P may 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 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 apparatus for manufacturing a secondary battery shown in FIG. 6.

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

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

4 and 5, the notching device 370 has at least one cutter 382 for forming an electrode tab by pressing and shearing the uncoated portion C2 of the electrode current collector C1, An upper mold transfer unit (not shown) that reciprocates and transfers the upper mold 380 installed on the upper side of the electrode fabric (F) and the upper mold 380 to be close to the electrode fabric (F) or spaced apart from the electrode fabric (F) And, it has at least one insertion groove 392 indented so that any one of the cutters 382 sheared from the uncoated part C2 is inserted, and is located under the electrode fabric F so as to be able to support the electrode fabric F. A lower mold transfer unit (not shown) for reciprocating and transferring the installed lower mold 390 and the lower mold 390 to be close to the electrode fabric F or spaced apart from the electrode fabric F, and the upper mold 380 It may include a linear bushing 400 to guide the transfer of each of the lower mold 390. Here, the electrode fabric F refers to a composite of the electrode current collector C1 and the electrode active material layer A2 formed on one surface of the electrode current collector C1.

As shown in FIG. 6, according to the above-described notching device 370, the electrode material F is supported by the lower mold 390, and the electrode is collected using the cutter 382 of the upper mold 380. An electrode tab may be formed by pressing and shearing the uncoated portion C2 of the entire C1 and a region of the electrode active material layer A2 adjacent to the uncoated portion C2 together. In the process of forming the electrode tab using the cutter 382 as described above, the electrode active material, moisture, oil, etc., foreign substances may be attached to the contact surface of the cutter 382 in contact with the uncoated portion (C2) and the electrode active material layer (A). I can. In order to solve this, the cleaning apparatus 200 for manufacturing a secondary battery is provided so as 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 apparatus 200 for manufacturing 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 solid cleaning particles W having sublimation properties. The cleaning unit 210 and an inonizer 220 that radiates 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 or the like for sucking and recovering particles of foreign matter separated from the cleaning surface by. 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 a region adjacent thereto 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), a cleaning nozzle 212, and the like.

The structure of the cleaning material usable as the cleaning particles (W), the gas usable as the carrier gas (G), and the cleaning nozzle 212 are the same or similar to those of the cleaning apparatus 100 for manufacturing a secondary battery described above, respectively, A description of this will be omitted.

The installation position of the cleaning nozzle 212 is not particularly limited. For example, the cleaning nozzle 212 includes a suction 230, a cleaning nozzle 212 fixedly installed thereon, and an inonizer 220 by a suction transfer unit 240 to be described later. ) May be fixedly installed in a predetermined position inside the suction 230 so as to spray the cleaning particles W toward the cleaning surface of the cutter 382 when entering the gap between them.

As shown in FIG. 6, each cutter 382 is provided to extend by 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, it is preferable that the moving direction of the fabric is the longitudinal direction of the electrode fabric (F). In this case, the notching device 370 may further include an electrode transfer unit (not shown) that transfers the electrode distal end 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, so that the uncoated portion to form a new electrode tab ( One section of C2) may enter the notching device 370.

In the case where the cutter 382 is provided to extend long along the moving direction of the fabric as above, the cleaning unit 210 is the same as the cutter 382 or the length of the fabric by a predetermined ratio compared to the cutter 382 It is preferable that it is provided to extend long along the moving direction.

The installation position of the inonizer 220 is not particularly limited. For example, as shown in FIG. 6, the inonizer 220 includes a suction 230, a cleaning nozzle 212 fixedly installed thereto, and an inonizer 220 by a suction transfer unit 240 to be described later. Suction 230 so that ions I can be sprayed toward the cleaning surface of the cutter 382 through at least one ion spinneret 222 when entering the gap between the 382 and the electrode distal end F. It can be fixedly installed in a predetermined position inside. In addition, the inonizer 220 is preferably provided 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 the 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 is predetermined so that the cleaning nozzle 212 and the inonizer 220 can be fixedly installed inside the suction 230, respectively. It has a width and a length.

The cleaning apparatus 200 for manufacturing a secondary battery may enter the suction 230 and the cleaning nozzle 212 and the inonizer 220 fixedly installed therewith into the gap between the cutter 382 and the electrode fabric (F), or A suction transfer unit 240 capable of reciprocating the suction 230 in the width direction of the fabric may be further included so that it can be withdrawn from the gap. In this case, as shown in FIG. 7, the cleaning nozzle 212 is installed to be located at an end spaced apart from the notching device 370 among both ends of the suction 230, but the notching device 370 side It can be installed so as to be inclined to be inclined toward. In addition, as shown in FIG. 7, the inonizer 220 may be installed to be located 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 the suction 230 in the width direction of the far end.

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, at each predetermined cleaning cycle, the suction 230, etc., using the suction transfer unit 240, enter the gap between the cutter 382 and the electrode fabric (F). Together with the sikim, 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 ( The cleaning surface of the 382 may be sequentially neutralized, and particles of foreign matter separated from the cutters 382 may be sequentially sucked and recovered using the suction 230.

Meanwhile, the suction transfer unit 240 has been described as transferring the suction 230 or 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 length direction of the fabric, and enters the suction 230 into the gap between the cutter 382 and the electrode fabric F. It may be arranged to allow or withdraw from these intervals.

As described above, the cleaning device 200 for manufacturing a secondary battery uses a notching device for performing a notching process of an electrode during the manufacturing process of a secondary battery using fine dry ice particles and other solid 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 off using a cleaning member to be cleaned or treated with a chemical substance to clean the cleaning surface. Compared to a conventional cleaning device, damage to the cutter 382 can be minimized, and moisture, oil, and other various kinds of foreign matter can be easily removed from the cutter 382.

In addition, according to the cleaning apparatus 200 for manufacturing a secondary battery, the cleaning nozzle 212 may be introduced into a narrow gap between the cutter 382 and the electrode fabric F to clean the cleaning surface of the cutter 382. Accordingly, when the cleaning apparatus 200 for manufacturing a secondary battery is used, compared to the conventional cleaning method of cleaning the cleaning surface of the cutter 382 after separating the cutter 382 from the upper mold 380, the cutter 382 The time required for separation and reassembly may be reduced, and the cutter 382 may be prevented from being erroneously mounted or damaged during the separation and reassembly process of the cutter 382.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention.

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

100: cleaning device for manufacturing secondary battery
110: cleaning unit
112: cleaning nozzle
120: ionizer
130: suction
200: cleaning device for manufacturing secondary battery
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: no branch
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 (2)

In the cleaning apparatus for manufacturing a secondary battery for removing foreign substances adhering to a pressure roller of a roll press device that adheres an electrode active material layer formed on one surface of an electrode current collector to the electrode current collector,
A cleaning unit including a cleaning nozzle for removing the foreign substances by spraying solid cleaning particles having sublimability toward a predetermined cleaning surface of the pressure roller; And
A cleaning apparatus for manufacturing a secondary battery comprising suction for sucking and removing particles of foreign matter separated from the cleaning surface. In the cleaning apparatus for manufacturing a secondary battery for removing foreign substances attached to a cutter of a notching device for forming an electrode tab by shearing the uncoated portion of an electrode current collector,
A cleaning unit including a cleaning nozzle for removing foreign substances by spraying solid cleaning particles having sublimation properties toward a predetermined cleaning surface of the cutter;
Suction for sucking and removing particles of foreign matter separated from the cleaning surface; And
A cleaning apparatus for manufacturing a secondary battery comprising a transfer unit for reciprocating and transferring the cleaning unit and the suction to enter or withdraw from the gap between the cutter and the uncoated part.

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