WO2023090851A1

WO2023090851A1 - Shim for die coater, and die coater comprising same

Info

Publication number: WO2023090851A1
Application number: PCT/KR2022/018089
Authority: WO
Inventors: 안광전; 김근회; 홍택환; 사의석
Original assignee: 주식회사 엘지에너지솔루션
Priority date: 2021-11-18
Filing date: 2022-11-16
Publication date: 2023-05-25
Also published as: KR20230072591A; DE212022000173U1

Abstract

The present invention relates to a shim for a die coater, and a die coater comprising same and, more specifically, to a shim for a die coater used for forming a coating pattern on a current collector, and a die coater comprising same, the shim having a guide block, which is used for splitting the flow of a slurry into multiple flows in accordance with the coating pattern, is detachably provided on a main body of the shim.

Description

Shim for die coater, and die coater including the same

The present invention relates to a shim for a die coater, and a die coater including the same, and in detail, in a shim for a die coater used to form a coating pattern on a current collector, according to the coating pattern, the flow of slurry is divided into several It relates to a shim for a die coater in which a guide block to be used is detachably provided in a main body of the shim, and a die coater including the same.

This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0158986 dated November 18, 2021, and all contents disclosed in the literature of the Korean patent application are included as part of this specification.

In general, in order to manufacture a secondary battery, an electrode assembly is stored in a battery case, an electrolyte is injected, and then sealed. In addition, the electrode assembly is manufactured by gathering unit cells stacked in a three-layer structure or a five-layer structure with a separator interposed between the positive electrode and the negative electrode.

Such an anode or cathode electrode may be manufactured by applying the slurry to a current collector, then drying and pressing the slurry. To apply this slurry, a die coater is used.

The die coater uses a non-pulsation pump or a piston pump to apply fluid (e.g., slurry, adhesive, hard coating agent, ceramic etc.) through a discharge port provided between the upper and lower dies.

1 is a front view of a shim 20 for a conventional die coater.

A die coater used in manufacturing an electrode continuously applies slurry to a current collector in a certain direction for a long time. In order to form a discharge port through which the slurry is discharged, a die coater shim 20 is interposed between the upper die and the lower die in the die coater.

The slurry coating part may be formed long along the direction of movement of the current collector, and may be formed in a stripe pattern in which coated parts and uncoated parts are alternately arranged on the current collector. In order to apply the slurry in a stripe pattern, as shown in FIG. 1, a plurality of guides for forming a plurality of slits 23 through which the slurry is discharged to form a coating portion in the die coater shim 20 ( 22) is provided.

Meanwhile, since the guide 22 is integrally formed with the conventional die coater shim 20, when the coating pattern is changed, the die coater shim 20 itself needs to be replaced in the die coater. Accordingly, since the entire shim 20 for the die coater needs to be manufactured, there is a problem in that replacement cost increases when the coating pattern is changed.

The present invention is a shim for a die coater used to form a coating pattern on a current collector, and a shim for a die coater in which a guide block used to divide the flow of slurry into several parts according to the coating pattern is detachably installed on the body and includes the same It is a problem to be solved to provide a die coater that does.

In addition, an object of the present invention is to provide a shim for a die coater and a die coater including the same, which can easily adjust the width of a coated portion and an uncoated portion applied on a current collector through a guide block.

In addition, an object of the present invention is to provide a shim for a die coater and a die coater including the same, which can reduce the cost required to replace a shim for a die coater according to a coating pattern of a current collector.

In order to solve the above problems, a shim for a die coater according to an embodiment of the present invention is mounted on a die coater for applying slurry to a current collector and forms a coating pattern. A main body having one or more main slits open toward the discharge port of the die coater to guide the discharge port, one or more fastening grooves provided in the main body, and detachably mounted in the fastening groove, and controlling the flow of the slurry passing through the main slit It includes a guide block that divides into at least two streams.

The guide block may include a block fastening part inserted into the fastening groove and a guide part extending from the block fastening part toward the main slit, and when the block fastening part is inserted into the fastening groove, the guide part guides the main slit. It can be divided into two sub slits.

In addition, in the guide block, a boundary area between the guide part and the block fastening part may be rounded with a predetermined curvature.

In addition, the block fastening part has a first surface provided with the guide portion, a width wider than the width of the first surface, and a second surface in an opposite direction to the first surface, one side of the first surface and the second surface. It may include a first inclined surface connecting one side of the and a second inclined surface connecting the other side of the first surface and the other side of the second surface.

Also, when the block fastening part is inserted into the fastening groove, the first surface may be placed on the same plane as the base part of the main body, and the second surface may contact the bottom surface of the fastening groove.

In addition, the block fastening part may have an end of the first inclined surface connected to one side of the second surface and an end of the second inclined surface connected to the other side of the second surface rounded to a predetermined curvature.

In addition, the guide block may be provided to divide the main slot into two sub-slits having the same size.

In addition, the fastening groove extends from one side of the bottom surface of the groove recessed into the installation surface of the base portion facing the main slit and from one side of the bottom surface of the groove to the installation surface of the base portion, and is inclined with respect to the installation surface of the base portion. It may include a second groove side surface that extends from the first groove side surface and the other side of the groove bottom surface to the installation surface of the base part and is inclined with respect to the base part.

In addition, the fastening groove may be provided with a width gradually increasing from an installation surface of the base part to a bottom surface of the groove.

In addition, the first groove side surface of the fastening groove may be provided parallel to the first inclined surface so as to come into contact with the first inclined surface that is one side surface of the block fastening part, and the second groove side surface of the fastening groove is the other side surface of the block fastening part. It may be provided parallel to the second inclined surface so as to come into contact with the second inclined surface.

In addition, in the fastening groove, the first connection portion connecting the first groove side surface and the groove bottom surface and the second connection portion connecting the second groove side surface and the groove bottom surface are rounded with a predetermined curvature. can

In addition, the fastening groove may include a first wing portion provided in a boundary region between the installation surface of the base portion and the first groove-side surface, and a second wing portion provided in a boundary region between the installation surface of the base portion and the second groove-side surface. can

In addition, the first wing and the second wing may be provided facing each other toward the inner space of the fastening groove.

In addition, the first wing portion may be provided such that a thickness decreases along a direction toward the second wing portion, and a thickness of the second wing portion decreases along a direction toward the first wing portion.

In addition, the first wing and the second wing may have a symmetrical shape with respect to the guide block.

In addition, according to another aspect of the present invention, a first die, a second die forming a discharge port together with the first die, and a shim for a die coater disposed between the first die and the second die and guiding the slurry to the discharge port A die coater is provided. At this time, the shim for the die coater is detachably mounted in a main body having one or more main slits open toward the discharge port, one or more fastening grooves provided in the main body, and the fastening grooves, and the flow of the slurry passing through the main slits is controlled by at least two It includes a guide block that divides into two flows.

As described above, the die coater shim and the die coater including the die coater related to at least one embodiment of the present invention have the following effects.

In a shim for a die coater used to form a coating pattern on a current collector, a guide block used to divide the flow of slurry into several parts according to the coating pattern is provided to be detachably mounted on the main body of the shim.

In addition, according to the coating pattern of the current collector, the position of the guide block can be adjusted or the guide block can be easily replaced.

In addition, by applying a detachable guide block to a position corresponding to the boundary of the coating unit, it is possible to secure the sliding reproducibility of the coating unit.

Unlike the conventional replacement of the core for the die coater to correspond to the coating pattern, the present invention mounts a guide block to match the coating pattern of the current collector or adjusts the position of the guide block, thereby increasing the width and height of the coated portion of the current collector. The width of the uncoated part can be adjusted.

In addition, in the present invention, when adjusting the thickness of the coating part of the current collector, unlike replacing the die coater shim itself in the past, only the guide block can be replaced according to product specifications, so the cost and time to replace the entire die coater shim can save

1 is a front view of a conventional die coater core.

2 is a diagram schematically illustrating a process of applying a slurry to a current collector using a die coater according to an embodiment of the present invention.

FIG. 3 schematically shows a sectional view along X-X in FIG. 2 .

4 schematically illustrates an exploded perspective view of a die coater according to an embodiment of the present invention.

5 schematically illustrates a front view of a shim for a die coater according to an embodiment of the present invention.

Figure 6 schematically illustrates a main body provided with a fastening groove according to an embodiment of the present invention.

7 schematically illustrates the structure of a guide block according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings.

Since the configurations shown in the embodiments described in this specification are only one of the most preferred embodiments of the present application and do not represent all of the technical spirit of the present application, various equivalents and modifications that can replace them at the time of the present application There may be examples.

In addition, it should be understood that the accompanying drawings in this application are enlarged or reduced for convenience of description.

Hereinafter, a shim for a die coater according to an embodiment of the present invention and a die coater including the same will be described with reference to the accompanying drawings.

FIG. 2 is a view schematically illustrating a process of applying a slurry to a current collector using a die coater according to an embodiment of the present invention, and FIG. 3 is a schematic cross-sectional view taken along XX of FIG. 2 .

4 schematically illustrates an exploded perspective view of a die coater according to an embodiment of the present invention, and FIG. 5 schematically illustrates a front view of a shim for a die coater according to an embodiment of the present invention.

In addition, Figure 6 schematically shows a main body provided with a fastening groove according to an embodiment of the present invention, and Figure 7 schematically illustrates the structure of a guide block according to an embodiment of the present invention.

Referring to FIGS. 2 to 4 , the die coater 200 according to an embodiment of the present invention is a device for applying the slurry S to the current collector 10 when an electrode is manufactured. Referring to FIG. 2 , the die coater 200 is disposed on top of a current collector 10 that is transported in one direction (M) along a roll-to-roll facility.

In addition, the die coater 200 is disposed horizontally with respect to the width direction W of the current collector 10 . The die coater 200 has a shape extending along the longitudinal direction (L), and the die coater 200 extends the current collector 10 such that the longitudinal direction L is parallel to the width direction W of the current collector 10. placed on top

In addition, the die coater 200 receives the slurry S therein and applies the slurry S through the discharge port 201 on the current collector 10 being transported in the traveling direction M.

In addition, referring to FIG. 4, the die coater 200 includes a die coater core 100, a first die 210 (also referred to as 'lower die') and a second die 220, 'upper die'. Also referred to as 'die').

Specifically, the die coater 200 is disposed between a first die 210, a second die 220 forming a discharge port 201 together with the first die 210, and between the first die and the second die, , and a die coater shim 100 for guiding the slurry S to the discharge port 201.

In addition, the first die 210 has an accommodating space 211 in which the slurry S is accommodated and a supply hole 212 through which the slurry is supplied to the accommodating space 211 . The accommodating space 211 may be provided in the form of a groove for the first die 210 . In addition, the supply hole 212 is an opening through which slurry S is supplied from the outside. The supply hole 212 is provided to communicate with the accommodation space 211 . The slurry S flows into the first die 210 through the supply hole 212 and is stored in the receiving space 211 .

The first die 210 and the second die 220 are assembled to each other and have a structure in which a discharge port 201 is provided for discharging the slurry to the outside. Here, the discharge port 201 is an opening through which the slurry is discharged to the outside of the die coater 200 . The discharge port 201 may be provided thin and long along the longitudinal direction L of the die coater 200 .

The shim 100 for the die coater is installed between the first die 210 and the second die 220 . The die coater shim 100 is disposed inside the die coater 200 that applies the slurry S to the current collector 10 and forms a coating pattern on the current collector S.

The die coater 200 used in manufacturing the electrode continuously applies the slurry to the current collector 10 in a certain direction (M) for a long time. On the other hand, on the current collector 10, the coated portion 11 to which the slurry S is applied and the uncoated portion 12 to which the slurry S is not applied may be formed together.

Both the coated portion 11 and the uncoated portion 12 of the slurry have a predetermined width and are formed long along a predetermined direction M on the current collector, and on the current collector 10, the width direction of the current collector 10 It may be formed in a stripe pattern in which the coated portion 11 and the uncoated portion 12 are alternately arranged along the .

To apply the slurry on the current collector 10 in a stripe pattern, a die coater shim 100 is used. The die coater 200 forms a slurry coating pattern through the die coater shim 100 built therein. The pattern of the coating unit 11 may be varied through the guide block 120 of the die coater shim 100 to be described later.

Referring to FIG. 3 , the current collector 10 is divided into a coated portion 11 and an uncoated portion 12 . The coating portion 11 is a portion to which the slurry is applied. And, the uncoated part 12 is a part where the slurry is not applied. The width of the uncoated portion 12 may be determined by the distance D between two adjacent coated portions 11 .

The distance D between the coating parts 11 may vary according to the width A of the guide part 125 of the guide block 120 of the die coater shim 100 (see FIG. 7 ). In addition, the thickness t of the coating portion 11 may vary according to the thickness of the guide portion 125 of the shim 100 for the die coater.

Referring to FIG. 5 , the die coater shim 100 includes a main body 110 provided with at least one fastening groove 111 and at least one guide block 120 .

The die coater shim 100 is mounted in the die coater 200 that applies the slurry S to the current collector 10, and is a die coater shim for forming a coating pattern. A body 110 having one or more main slits 114 open toward the discharge port 201 of the die coater to guide the discharge port 201, one or more fastening grooves 111 provided in the body 110, and the fastening groove It is detachably mounted to 111 and includes a guide block 120 dividing the flow of the slurry passing through the main slit 114 into at least two flows F1 and F2.

The body 110 may include a base portion 116 extending along the longitudinal direction L of the die coater and a pair of side walls 113 extending from both ends of the base portion 116 toward the discharge port. . A space for accommodating the slurry may be formed inside the body 110 by the base portion 116 and the pair of side walls 113 . For example, the main body 110 may have a D-shaped (c) shape. In addition, the main body 110 may include a partition wall 115 positioned between the pair of side walls 113 and extending from the base portion 116 .

A main slit 114 may be formed in the main body 110 through a gap between the partition wall 115 and the side wall 113 . The slurry accommodated in the body 110 may flow toward the outlet 201 through the main slit 114 .

Referring to FIG. 6 , the main body 110 has a main slit 114 opened toward the discharge port and a base portion 116 provided to face the main slit 114 . At least one fastening groove 111 is provided in the base part 116 . Meanwhile, when a plurality of fastening grooves 111 are provided in the base part 116, the fastening grooves 111 may be spaced apart from each other at predetermined intervals along the longitudinal direction of the main body 110. The base part 116 has an installation surface 112 facing the main slit 114, and the fastening groove 111 is provided on the installation surface 112.

The guide block 120 may include a block fastening part 121 inserted into the fastening groove 111 and a guide part 125 extending from the block fastening part 121 toward the main slit 114. . When the block fastening part 121 is inserted into the fastening groove 111, the guide part 125 may divide the main slit 114 into two sub slits C1 and C2. In addition, in the guide block 120, the boundary area between the guide 125 and the block fastening unit 121 may be rounded with a predetermined curvature.

At this time, when the slurry is discharged through the discharge port 201 in a state where the guide block 120 is not mounted in the fastening groove 111, the width of the coating portion on the current collector can be determined based on the width of the main slit 114 there is.

Unlike this, at this time, when the slurry in the main body 111 is discharged through the discharge port 201 in a state where the guide block 120 is mounted in the fastening groove 111, the main slit 114 is removed by the guide part 125 The flow of the slurry passing through can be divided into at least two flows F1 and F2, and accordingly, the width of the coating unit is smaller than the width of the main slit 114, and the width of each sub-slit C1 and C2 corresponds to the width. can be determined based on In addition, the guide block 120 may be provided to divide the main slot 114 into two sub-slits having the same size.

The fastening groove 111 may include a groove bottom surface 111a, a first groove side surface 111c and a second groove side surface 111d.

Specifically, the fastening groove 111 is recessed into the installation surface 112 of the base part 116 facing the main slit 114, and one side of the groove bottom surface 111a, the groove bottom surface 111a. Extends from the installation surface 112 of the base part, and the base part installation surface ( 112), and may include a second groove side surface 111d inclined with respect to the installation surface of the base part 112.

The fastening groove 111 may be provided with a width gradually increasing from the installation surface 112 of the base part 116 to the bottom surface 111a of the groove. For example, the fastening groove 111 may have a trapezoidal cross section.

The groove bottom surface 111a is parallel to the installation surface 112 of the base part 116, but may be provided stepwise with respect to the installation surface 112 of the base part 116.

The block fastening part 121 has a first surface 121a on which the guide part 125 is provided, a width wider than that of the first surface 121a, and a second surface in the opposite direction to the first surface ( 121b), a first inclined surface 121c connecting one side of the first surface 121a and one side of the second surface 121b, and the other side of the first surface 121a and the other side of the second surface 121b It may include a second inclined surface 121d to connect.

In addition, the first groove side surface 111c of the fastening groove 111 may come into contact with the first inclined surface 121c that is one side surface of the block fastening part 121 . At this time, the first groove side surface 111c is a surface connecting the base part 116 and the groove bottom surface 111a on one side of the groove bottom surface 111a. The slope of the first groove side surface 111c may correspond to the slope of the first slope surface 121c. For example, the slope of the first groove side surface 111c may be formed to be the same as the slope of the first slope surface 121c.

That is, when the guide block 120 is mounted in the fastening groove 111, the first groove side surface 111c of the fastening groove 111 is a first inclined surface 121c that is one side surface of the block fastening part 121. It may be provided parallel to the first inclined surface 121c so as to come into contact with.

In addition, the second groove side surface 111d may connect the base part 116 and the groove bottom surface 111a on the other side of the groove bottom surface 111a. The first groove side surface 111c and the second groove side surface 111d may each be provided with a downward slope with respect to the base portion 112 .

When the guide block 120 is mounted in the fastening groove 111, the second groove side surface 111d may be provided in contact with the second inclined surface 121d, which is the other side surface of the block fastening part 121. The slope of the second groove side 111d may correspond to the slope of the second slope 121d. The second groove side surface of the fastening groove 11 may be provided parallel to the second inclined surface 121d so as to come into contact with the second inclined surface 121d that is the other side surface of the block fastening part 121 .

In addition, the block fastening part 121 is the end of the first inclined surface 121c connected to one side of the second surface 121b and the second inclined surface connected to the other side of the second surface 121b. The end of 121d may be rounded to have a predetermined curvature.

In addition, when the block fastening part 121 is inserted into the fastening groove 111, the first surface 121a is placed on the same plane as the installation surface 112 of the base part of the main body, and the second surface 121b may be in contact with the bottom surface 111a of the fastening groove 111.

In addition, the fastening groove 111 includes a first connection portion 111c-1 connecting the first groove side surface 111c and the groove bottom surface 111a and the second groove side surface 111d and the groove The second connection portion 111d-1 connected to the bottom surface 111a may be rounded to have a predetermined curvature.

In addition, the fastening groove 111, the first wing 111e provided in the boundary area between the installation surface 112 of the base portion and the first groove side surface 111c and the installation surface 112 of the base portion and the A second wing portion 111f provided in a boundary area of the second groove side surface 111d may be included. The first wing 111e and the second wing 111f may face each other toward the inner space of the fastening groove 111 .

In addition, the first wing portion 111e has a smaller thickness along the direction toward the second wing portion 111f, and the second wing portion 111f has a thickness along the direction toward the first wing portion 111e. It may be arranged to be smaller. In a state where the guide block 120 is mounted in the fastening groove 111, the first wing portion 111e and the second wing portion 111f may have symmetrical shapes with respect to the guide block 120.

In this embodiment, the first wing portion 111e refers to a portion formed by the base portion 112 and the first groove side surface 111c. The second wing portion 111f refers to a portion formed by the base portion 112 and the second groove side surface 111d.

In the first wing 111e and the second wing 111f, the end of the first wing 111e and the end of the second wing 111f face each other toward the inner space of the fastening groove 111. can be provided. For example, the first wing 111e and the second wing 111f may have a substantially triangular cross section.

Due to these shapes, the first wing portion 111e and the second wing portion 111f have structural elasticity and facilitate attachment and detachment of the guide block 120 to the fastening groove 111.

Further, in the fastening groove 111, the first connecting portion 111c-1 and the second connecting portion 111d-1 are rounded. Here, the first connection portion 111c-1 refers to a portion where the first groove side surface 111c is connected to the groove bottom surface 111a. The curvature of the first connection portion 111c-1 corresponds to the curvature of the end 121c-1 of the first inclined surface 121c. For example, the curvature of the first connection portion 111c-1 may be the same as the curvature of the end 121c-1 of the first inclined surface 121c.

Also, the second connection portion 111d-1 refers to a portion where the second groove side surface 111d is connected to the groove bottom surface 111a. The curvature of the second connection portion 111d-1 corresponds to the curvature of the end 121d-1 of the second inclined surface 121d. For example, the curvature of the second connection part 111d-1 may be the same as the curvature of the end 121d-1 of the second inclined surface 121d.

When the guide block 120 is inserted into the fastening groove 111, the second surface 121b of the block fastening part 121 is formed by the structural elasticity of the first wing part 111e and the second wing part 111f. Even if the width is greater than the width of the inlet of the fastening groove 111, it can be easily inserted into the fastening groove 111.

In addition, after inserting the block fastening part 121 into the fastening groove 111 by applying an external force, when the force pressing the guide block 120 is released, the first wing part 111e and the second wing part 111f block By pressing the fastening part 121, it is possible to prevent the guide block 120 from being separated from the fastening groove 111.

In addition, in order to separate the guide block 120 from the fastening groove 111, when the guide block 120 is pulled in the opposite direction of the fastening groove 111, the block fastening part 121 is the first wing part 111e A force is generated to push up the end of the end and the end of the second wing 111f. At this time, along the pulling direction of the guide block 120, while the end of the first wing 111e and the end of the second wing 111f are lifted, the guide block 120 is in the fastening groove 111. is easily separated

In this embodiment, the guide block 120 is detachably coupled to the fastening groove 111. A plurality of coupling grooves may be formed in the base portion 116, and adjacent coupling grooves may be spaced apart from each other at predetermined intervals. At this time, the guide block 120 may be mounted in one fastening groove, or may be mounted on another fastening groove in order to change the coating pattern. The guide block 120 serves as a barrier to divide the slurry flow passing through the main slit 114 into at least two flows F1 and F2. In addition, the guide block 120 may perform a function of adjusting the width of the uncoated portion 12 region with the width A of the guide portion 125 .

In addition, it is possible to control the sliding (slidig) of the coating unit through the guide block 120. Here, sliding refers to a thickness profile of a boundary region of the coating unit 11 when the slurry is coated on the current collector 10 .

Referring to FIG. 7 , the guide block 120 may have a block fastening portion 121 and a guide portion 125 integrally formed, and the guide block 120 may have a substantially T-shaped cross section.

As described above, the block fastening part 121 is a part fitted into the fastening groove 111. Accordingly, the block fastening part 121 may have a shape corresponding to the fastening groove 111 . Specifically, the block fastening part 121 includes a first surface 121a on which the guide part 125 is provided, and a second surface parallel to the first surface 121a but wider than the width of the first surface 121a. of the surface 121b, the first inclined surface 121c connecting one side of the first surface 121a and one side of the second surface 121b, and the other side of the first surface 121a and the second surface 121b. The second inclined surface 121d connecting the other side may be integrally formed.

When the block fastening part 121 is inserted into the fastening groove 111, the first surface 121a is placed on the same plane as the installation surface 112 of the base part 116, and the second surface 121b is It may be provided in contact with the bottom surface of the fastening groove 111 . That is, the guide block 120 may be provided so that the thickness of the block fastening part 121 corresponds to the depth of the fastening groove 111.

In addition, the block fastening part 121 includes an end 121c-1 of the first inclined surface 121c connected to one side of the second surface 121b and a second inclined surface connected to the other side of the second surface 121b ( The end 121d-1 of 121d) is rounded with a predetermined curvature.

In addition, the guide block 120 is a connection portion (125a) of the first surface (121a) of the block fastening portion 121 and the guide portion 125, that is, the guide portion 125 is the second portion of the block fastening portion (121). A starting portion extending from the first surface 121a may be rounded with a predetermined curvature.

According to this structure, it is possible to minimize the friction of the slurry on the guide block 120 near the edges of the sub-slits C1 and C2. In this way, it is possible to minimize the decrease in flow velocity of the slurry at the edges of the sub-slits C1 and C2, and as a result, the slurry can be uniformly discharged over the entire width of the sub-slits C1 and C2.

When the block fastening part 121 is inserted into the fastening groove 111, the guide part 125 may partition the inner space of the main body 110 while being positioned perpendicular to the base part 116. The guide part 125 serves as a partition wall partitioning the inner space of the main body 110, and the guide part 125 guides the flow of the slurry toward the discharge port 201.

In this embodiment, the guide portion 125 may extend perpendicularly to one surface of the block fastening portion 121 . In addition, the guide portion 125 may have a narrower width than the block fastening portion 121 . The guide part 125 may protrude vertically from the center of the first surface 121a of the block fastening part 121 . The guide part 125 may have a bar structure having a thickness corresponding to the thickness of the body 110 .

As described above, the guide block 120 can be detachably mounted on the main body 110, and according to the coating pattern for the current collector, the guide block 120 can be mounted in the fastening groove, or the guide block The fastening groove in which the 120 is mounted may be changed. Through this, the main slit 114 can be divided into a plurality of sub-slits C1 and C2, and the widths of the sub-slits C1 and C2 can be adjusted according to the position of the guide block 120.

In general, it is difficult to secure sliding reproducibility by influencing factors. Here, the influencing factors include the viscosity of the slurry, the spread width of the slurry, the distance the slurry moves from the bottom surface of the die, and/or the temperature of the slurry. However, as in the present invention, sliding reproducibility can be secured through the guide block 120 .

Preferred embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications and changes and additions are intended to fall within the scope of the following claims.

In the present invention, the width of the coated portion and the uncoated portion of the current collector may be adjusted by mounting a guide block or adjusting the position of the guide block to match the coating pattern of the current collector.

Claims

A shim for a die coater mounted on a die coater for applying slurry to a current collector and forming a coating pattern,

a main body having at least one main slit open toward the discharge port of the die coater to guide the slurry to the discharge port of the die coater;

one or more fastening grooves provided in the main body; and

A shim for a die coater comprising a guide block detachably mounted in the fastening groove and dividing a flow of the slurry passing through the main slit into at least two flows.
According to claim 1,

The guide block includes a block fastening portion inserted into the fastening groove and a guide portion extending from the block fastening portion toward the main slit,

When the block fastening part is inserted into the fastening groove, the guide part divides the main slit into two sub slits.
According to claim 2,

The guide block is a shim for a die coater in which a boundary region of the guide part and the block fastening part is rounded with a predetermined curvature.
The method of claim 2, wherein the block fastening unit,

a first surface provided with the guide part;

a second surface having a width greater than that of the first surface and facing in a direction opposite to the first surface;

a first inclined surface connecting one side of the first surface and one side of the second surface; and

A shim for a die coater comprising a second inclined surface connecting the other side of the first surface and the other side of the second surface.
According to claim 4,

When the block fastening part is inserted into the fastening groove, the first surface is placed on the same plane as the base part of the main body, and the second surface is in contact with the bottom surface of the fastening groove.
According to claim 4,

The block fastening portion has an end portion of the first inclined surface connected to one side of the second surface and an end portion of the second inclined surface connected to the other side of the second surface rounded with a predetermined curvature. Shim for die coater.
According to claim 2,

The guide block is a die coater shim provided to divide the main slot into two sub-slits having the same size.
The method of claim 4, wherein the fastening groove

The bottom surface of the groove provided by being recessed into the installation surface of the base portion facing the main slit;

A first groove side surface extending from one side of the groove bottom surface to the installation surface of the base part and inclined with respect to the installation surface of the base part;

A shim for a die coater comprising a second groove side surface extending from the other side of the groove bottom surface to an installation surface of the base part and inclined with respect to the base part.
According to claim 8,

The fastening groove is a shim for a die coater provided to become wider from the installation surface of the base part to the bottom surface of the groove.
According to claim 8,

The first groove side surface of the fastening groove is provided parallel to the first inclined surface so as to come into contact with the first inclined surface, which is one side surface of the block fastening part,

The second groove side surface of the fastening groove is provided parallel to the second inclined surface so as to come into contact with the second inclined surface that is the other side surface of the block fastening part.
11. The method of claim 10, wherein the fastening groove,

A shim for a die coater in which a first connection portion connecting the first groove side surface and the groove bottom surface and a second connection portion connected to the second groove side surface and the groove bottom surface are rounded with a predetermined curvature.
11. The method of claim 10, wherein the fastening groove,

A first wing provided in a boundary region between the installation surface of the base and the first groove side and a second wing provided in a boundary region between the installation surface of the base and the second groove side,

The first wing and the second wing are shims for a die coater provided to face each other toward the inner space of the fastening groove.
According to claim 12,

The first wing part has a smaller thickness along the direction toward the second wing part, and the second wing part has a die coater shim provided such that the thickness decreases along the direction toward the first wing part.
According to claim 13,

A shim for a die coater having a symmetrical shape with respect to the guide block of the first wing and the second wing.
a first die;

a second die forming a discharge port together with the first die; and

A shim for a die coater disposed between the first die and the second die and guiding the slurry to the discharge port;

A core for a die coater includes a main body having at least one main slit open toward a discharge port;

one or more fastening grooves provided in the main body; and

A die coater including a guide block detachably mounted in the fastening groove and dividing the flow of the slurry passing through the main slit into at least two flows.