Insulating liquid flow path structure of slot die coater

Abstract

The disclosed invention relates to a slot die coater comprising: a first die block having a manifold for accommodating an electrode slurry; a second die block coupled to the first die block; and coater shims interposed between the first die block and the second die block. The coater shims include: body shims surrounding both side surfaces and the rear surface of the manifold; and a plurality of spacer shims disposed spaced apart between the body shims so as to extend across toward the front surface of the manifold, and having concave insulating liquid flow paths formed on the surface thereof, the spacer shims including: first spacer shims installed so as to be fixed in position with respect to the body shims; and second spacer shims that can change position within the first spacer shims.

Description

Insulating fluid flow path structure of slot die coater

[0001] The present invention relates to a slot die coater that simultaneously discharges electrode slurry and insulating liquid onto an electrode foil, and to an insulating liquid path structure of the slot die coater that can easily control the discharge amount of insulating liquid by adjusting the position of a spacer core.

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0051318, filed April 17, 2024, the entire contents of which are incorporated herein by reference.

[0003] Lithium secondary batteries are now widely used not only in small devices like portable electronic devices, but also in medium- to large-sized devices like battery packs for hybrid and electric vehicles and power storage systems. In particular, with growing concern over environmental issues, research is being conducted on electric and hybrid vehicles, which can replace fossil fuel-powered vehicles like gasoline and diesel, a major source of air pollution.

[0004] Typically, lithium secondary batteries have an electrode assembly structure consisting of a positive electrode, negative electrode, and separator, impregnated with a lithium electrolyte. The electrode is formed by coating an electrode current collector with an electrode slurry containing an electrode active material. A coating device such as a slot die coater is used to coat the electrode slurry.

[0005] A slot die coater includes an upper die block and a lower die block forming a chamber for supplying electrode slurry, and a core member disposed between the upper and lower die blocks to set the height and width of a slot for discharging active material slurry. The space between the plurality of core members forms a slot. The height of the slot for discharging the active material slurry is determined by the height of the core member, and the width of the slot is determined by the distance between the spaced-apart core members.

[0006] When electrode slurry coating is performed using a slot die coater, the shape of the edge varies depending on the extent to which the electrode slurry spreads (sliding length). If the extent of electrode slurry spreading is small, the sliding length that reduces the thickness of the edge is shortened, forming an area thicker than the average thickness. This increases the risk of short circuits occurring due to the side ring during electrode roll winding and a reversal of the N / P ratio.

[0007] Conversely, if the spreading degree of the electrode slurry is large, the sliding length becomes longer and the thickness of the edge decreases, which leads to a decrease in the capacity as much as the sliding part becomes worn, and there is a risk of lithium precipitation due to air traps. Since various aspects of the electrode, such as the capacity, safety, and lifespan, are greatly affected by the sliding length of the electrode slurry, a technology that simultaneously discharges the insulating liquid on the edge of the electrode slurry can be applied to control this. The insulating liquid acts as a kind of dam that controls the amount of the electrode slurry spreading, and by adjusting the amount and width of the insulating liquid discharge, the electrode slurry can be controlled to spread to an appropriate level.

[0008] Electrode slurry and insulating liquid are simultaneously discharged onto the running electrode, and for this purpose, an insulating liquid path is provided in the core member of the slot die coater. For example, the core member is composed of two types: a body core and a spacer core, and a plurality of spacer cores can be arranged in a blank area inside the body core. The space between the spacer cores forms a discharge slot for the electrode slurry, and the insulating liquid is discharged through an insulating liquid path concavely formed on the surface of the spacer core.

[0009] In the structure of this slot die coater, the amount of insulating liquid discharge is determined by the insulating liquid path formed on the spacer core. Therefore, in order to adjust or change the amount of insulating liquid discharge, the slot die coater must be disassembled and a spacer core of a new specification must be installed. This adjustment of the amount of insulating liquid discharge by replacing the spacer core is cumbersome in terms of the design, production, and management of the spacer core, as spacer cores of various specifications must be prepared in advance.

[0010] The purpose of the present invention is to provide a slot die coater that can easily control the discharge amount of insulating liquid by adjusting the position of a spacer core without replacing the core member of the slot die coater.

[0011] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0012] The present invention relates to a slot die coater, and in one example, the slot die coater comprises a first die block having a manifold for receiving electrode slurry, a second die block coupled with the first die block, and a coater shim interposed between the first die block and the second die block, wherein the coater shim comprises a body shim having a shape that surrounds both side surfaces and a rear surface of the manifold, and a plurality of spacer shims spaced apart from each other between the body shims so as to extend across the front surface of the manifold, and having a concave insulating liquid path formed on the surface, wherein the spacer shims include a first spacer shim whose position is fixedly installed with respect to the body shim, and a second spacer shim whose position is movable within the first spacer shim.

[0013] Accordingly, in the slot die coater of the present invention, the flow cross-sectional area of ​​the insulating liquid path changes according to the positional movement of the second spacer core.

[0014] In one embodiment, the second spacer core can move linearly along the transverse direction (TD).

[0015] The first spacer core may have a receiving portion with an open front, and the second spacer core may be positioned within the receiving portion and may have a guide hole in the form of an elongated hole along the width direction to have a fastening margin for a fixed pin positioned within the receiving portion.

[0016] Here, the fixed pin may be provided in the first die block.

[0017] And, an insulating liquid supply hole for supplying insulating liquid to the insulating liquid path may be formed within the first spacer core.

[0018] And, a gap between the first spacer core and the second spacer core, which is open in the longitudinal direction (MD, Machine Direction) while communicating with the insulating liquid supply hole, can form a part of the end of the insulating liquid path.

[0019] In another embodiment of the present invention, the second spacer core can perform a rotational movement in which the angle of the center line with respect to the longitudinal direction changes.

[0020] The first spacer core may have a receiving portion with an open front, and the second spacer core may be positioned within the receiving portion and may have a rotation hole that is coupled to enable rotational movement with respect to a fixed pin located within the receiving portion.

[0021] And, between the first spacer core and the second spacer core, a rotational contact surface in the shape of an arc with the center of curvature at the center of the fixed pin can be formed.

[0022] The above fixed pin may be provided in the first die block.

[0023] And, an insulating liquid supply hole for supplying insulating liquid to the insulating liquid path may be formed within the first spacer core.

[0024] And, a gap between the first spacer core and the second spacer core, which are open in the longitudinal direction while communicating with the insulating liquid supply hole, can form a part of the end of the insulating liquid path.

[0025] In this way, the slot die coater according to the present invention can adjust the flow cross-sectional area of ​​the insulating liquid path by moving the position of the second spacer core without replacing the coater core.

[0026] By adjusting the flow cross-sectional area, the amount of insulating liquid discharged can be easily changed, and electrode quality can be improved by appropriately controlling the degree of electrode slurry spreading. Furthermore, since changing the amount of insulating liquid discharge does not require a separate core member, maintenance costs and time are reduced.

[0027] However, the technical effects that can be obtained through the present invention are not limited to the above-described effects, and other effects that are not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0028] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0029] Figure 1 is a drawing showing an example of a conventional slot die coater.

[0030] Figure 2 is an enlarged view of part “A” of Figure 1.

[0031] Figure 3 is a drawing explaining sliding control by simultaneous discharge of electrode slurry and insulating liquid.

[0032] FIG. 4 is a drawing showing the structure of a spacer core according to one embodiment of the present invention.

[0033] Fig. 5 is a drawing showing an example of adjusting the width of the insulating liquid path by the spacer core of Fig. 4.

[0034] FIG. 6 is a drawing showing the structure of a spacer core according to another embodiment of the present invention.

[0035] Fig. 7 is a drawing showing an example in which the width of the insulating liquid path is reduced and adjusted by the spacer core of Fig. 6.

[0036] Fig. 8 is a drawing showing an example in which the width of the insulating liquid path is expanded and adjusted by the spacer core of Fig. 6.

[0037] [Explanation of symbols]

[0038] 10: Slot die coater 12: Front

[0039] 14: Lip 20: Slot

[0040] 30: Insulating fluid slot 100: First die block

[0041] 110: Manifold 120: Fixed pin

[0042] 200: Second die block 300: Coater core

[0043] 310: Body core 320: Spacer core

[0044] 330: First spacer core 332: Receptacle

[0045] 334: Insulating fluid supply hole 336: Insulating fluid path

[0046] 340: Second spacer core 342: Guide hole

[0047] 344: Rotating hole 350: Rotating contact surface

[0048] S: Gap CL: Centerline

[0049] TD: width direction MD: longitudinal direction

[0050]

[0051] The present invention can be modified in various ways and has many embodiments, and specific embodiments will be described in detail below.

[0052] However, this is not intended to limit the present invention to a specific embodiment, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0053] In the present invention, it should be understood that terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0054] Additionally, in the present invention, when a part such as a layer, film, region, or plate is described as being "on" another part, this includes not only cases where it is "directly above" the other part, but also cases where there is another part in between. Conversely, when a part such as a layer, film, region, or plate is described as being "under" another part, this includes not only cases where it is "directly below" the other part, but also cases where there is another part in between. Furthermore, in the present application, "being placed on" may include cases where it is placed below as well as above.

[0055]

[0056] The present invention relates to a slot die coater, and in one example, the slot die coater comprises a first die block having a manifold for receiving electrode slurry, a second die block coupled with the first die block, and a coater shim interposed between the first die block and the second die block, wherein the coater shim comprises a body shim having a shape that surrounds both side surfaces and a rear surface of the manifold, and a plurality of spacer shims spaced apart from each other between the body shims so as to extend across the front surface of the manifold, and having a concave insulating liquid path formed on the surface, wherein the spacer shims include a first spacer shim whose position is fixedly installed with respect to the body shim, and a second spacer shim whose position is movable within the first spacer shim.

[0057] Accordingly, in the slot die coater of the present invention, the flow cross-sectional area of ​​the insulating liquid path changes according to the positional movement of the second spacer core.

[0058] In this way, the slot die coater according to the present invention can adjust the flow cross-sectional area of ​​the insulating liquid path by moving the position of the second spacer core without replacing the coater core.

[0059] By adjusting the flow cross-sectional area, the amount of insulating liquid discharged can be easily changed, and electrode quality can be improved by appropriately controlling the degree of electrode slurry spreading. Furthermore, since changing the amount of insulating liquid discharge does not require a separate core member, maintenance costs and time are reduced.

[0060] Hereinafter, with reference to the attached drawings, a specific embodiment of the insulating liquid flow path structure of the slot die coater according to the present invention will be described in detail. For reference, the directions of front / back, up / down, left / right, etc. used to designate relative positions in the following description are intended to aid understanding of the invention, and unless otherwise specified, the directions depicted in the drawings are taken as the reference.

[0061]

[0062] [First Embodiment]

[0063] Fig. 1 is a drawing illustrating an example of a conventional slot die coater (10). To aid in understanding the present invention, a typical configuration of a slot die coater (10) will first be described with reference to Fig. 1.

[0064] Fig. 1 is an exploded perspective view of a slot die coater (10), which includes a first die block (100), a second die block (200), and a coater shim (300). Here, the first die block (100), the second die block (200), and the coater shim (300) are the main components that form the center of the slot die coater (10), and auxiliary components such as fastening bolts and pipes are omitted from the illustration to help understand the invention.

[0065] The first die block (100) is a block corresponding to one half of the body of the slot die coater (10) and is equipped with a manifold (110) for receiving electrode slurry. The second die block (200) is a block corresponding to the other half of the body of the slot die coater (10). The first and second die blocks (100, 200) are mutually connected to form one slot die coater (10).

[0066] Based on the illustrated direction, the first die block (100) may be referred to as a lower die block, and the second die block (200) may be referred to as an upper die block. The first die block (100) and the second die block (200) are joined by a number of fastening bolts (not illustrated) so that they can be disassembled and assembled. In addition, a coater shim (300) is interposed between the first die block (100) and the second die block (200).

[0067] The coater shim (300) serves to seal the joint surface between the first die block (100) and the second die block (200). The electrode slurry that is pressurized and filled into the manifold (110) is prevented from leaking by the coater shim (300). In addition, the coater shim (300) forms a slot (20) for discharging the electrode slurry on the front surface (12) of the slot die coater (10). Typically, the front surface (12) of the slot die coater (10) has a protrusion called a lip (14), and the slot (20) is formed along the lip (14).

[0068] In the illustrated slot die coater (10), the coater shim (300) includes a body shim (310) and a plurality of spacer shims (320). The body shim (310) may have a folded shape that surrounds both sides and the rear surface of the manifold (110). The body shim (310) mainly serves to seal the electrode slurry over a wide area. The plurality of spacer shims (320) are spaced apart from each other between the body shims (310) so as to cross the manifold (110) toward the front surface (12) (i.e., the lip of the slot die coater). Two spacer shims (320) adjacent to both ends in the width direction (TD) are in close contact with the body shim (310) to prevent the electrode slurry from leaking out.

[0069] The thickness of the body shim (310) and the spacer shim (320) are substantially the same, and this thickness determines the height of the slot (20) through which the electrode slurry is discharged. The width of the slot (20) is determined by the spacing between the spacer shims (320) that are spaced apart from each other. In the illustrated embodiment, the coater shim (300) has a structure composed of a body shim (310) and a plurality of spacer shims (320). This is because replacing the spacer shims (320) instead of replacing the entire coater shim (300) is more efficient in terms of maintenance effort and cost. Since the pressure of the electrode slurry acts on the corners of the spacer shim (320), its lifespan is limited due to deformation or wear. Therefore, there are many advantages to replacing only the spacer shim (320). However, in the embodiment of the present invention described below, it is not excluded that the body shim (310) and the spacer shim (320) are provided as one piece.

[0070] The spacer core (320) illustrated in Fig. 1 is provided with an insulating liquid passage (336) for discharging an electrode slurry and an insulating liquid. Fig. 2 is an enlarged view of part "A" of Fig. 1, showing in detail the spacer core (320) provided with an insulating liquid passage (336).

[0071] Referring to Fig. 2, the spacer core (320) has a concave insulating fluid passage (336) formed on its surface. The insulating fluid passage (336) has a narrow trench shape, i.e., a groove shape. An insulating fluid supply hole (334) for supplying insulating fluid is connected to one end of the insulating fluid passage (336), and the other end of the insulating fluid passage (336) extends and is open toward the front surface (12) of the slot die coater (10), i.e., the lip (14). The other end of the open insulating fluid passage (336) forms an insulating fluid slot (30).

[0072] According to the structure of this coater core (300), the electrode slurry pressurized and filled in the manifold (110) is discharged out of the lip (14) through the slot (20) between the spacer cores (320) spaced apart from each other across the manifold (110). Then, the insulating liquid is simultaneously discharged toward both edges of the electrode slurry discharged from the slot (20) through the insulating liquid path (336) formed in the spacer core (320). By this simultaneous discharge of the insulating liquid, the extent to which the electrode slurry spreads, that is, the sliding length of the electrode slurry, is controlled.

[0073] Fig. 3 is a drawing explaining sliding control by simultaneous discharge of electrode slurry and insulating liquid. The discharged electrode slurry spreads along both edges in the width direction (TD) due to its own fluidity, and the extent of spreading is suppressed by the insulating liquid discharged adjacent to the edge. In other words, the insulating liquid acts as a kind of dam that suppresses the spreading of the electrode slurry, and by adjusting the discharge amount and width of the insulating liquid, etc., and thereby the height and width of the dam, the extent of spreading of the electrode slurry can be controlled. Therefore, in electrode slurry and sliding control, the discharge amount and width of the insulating liquid become important factors.

[0074] In the past, in order to adjust the discharge amount and width of the insulating liquid in the simultaneous discharge of electrode slurry and insulating liquid, the entire coater core (300) in which the insulating liquid path (336) was formed, or at least the spacer core (320) in which the insulating liquid path (336) was formed, had to be replaced. However, adjusting the discharge amount of the insulating liquid by replacing the spacer core (320) is cumbersome in terms of design, manufacturing, management, etc. of the spacer core (320), because spacer cores (320) of various specifications must be prepared in advance.

[0075] The present invention provides a spacer core (320) capable of solving such problems, and Fig. 4 shows the structure of a spacer core (320) according to one embodiment of the present invention. The spacer core (320) of Fig. 4 is designed to adjust the discharge amount and width of the insulating liquid by changing the flow cross-sectional area of ​​the insulating liquid path (336).

[0076] Referring to FIG. 4, the illustrated spacer core (320) includes a first spacer core (330) whose position is fixedly installed with respect to the body core (310), and a second spacer core (340) whose position is movable within the fixedly installed first spacer core (330). An insulating fluid path (336) is formed along the boundary between the first spacer core (330) and the second spacer core (340). Therefore, when the distance between the second spacer core (340) and the fixed first spacer core (330) changes, or in other words, when the position of the second spacer core (340) with respect to the first spacer core (330) changes, the flow cross-sectional area of ​​the insulating fluid path (336) changes.

[0077] In the embodiment of FIG. 4, the second spacer shim (340) is configured to be able to move linearly along the transverse direction (TD). Here, the transverse direction (TD) refers to the direction corresponding to the extension direction of the slot (20) for discharging the electrode slurry, the transverse direction (TD) of the electrode moving with respect to the slot die coater (10). As the second spacer shim (340) moves linearly along the transverse direction (TD), the flow cross-sectional area of ​​the insulating liquid path (336) increases or decreases.

[0078] For example, the first spacer shim (330) may have a receiving portion (332) with an open front, and the second spacer shim (340) may be placed inside the receiving portion (332). A fixing pin (120) may be installed inside the receiving portion (332), and the second spacer shim (340) may have a guide hole (342) in the form of an elongated hole along the width direction (TD) so as to have a fastening margin with respect to the fixing pin (120). The guide hole (342) of the second spacer shim (340) is inserted into the fixing pin (120), and since the guide hole (342) has an elongated hole shape along the width direction (TD), the second spacer shim (340) may move linearly along the width direction (TD).

[0079] The assembly of the slot die coater (10) is usually performed by installing a coater shim (300) on a first die block (100), placing a second die block (200) thereon, and fastening them together with fastening bolts to apply sufficient pressure to the coater shim (300). Among the coater shims (300), the body shim (310) and the first spacer shim (330) that maintain a fixed position are aligned to a set position on the first die block (100) by a fixing pin (120) and / or a fixing bolt (not shown). Since the installation position of the second spacer shim (340) is determined by its relative position with respect to the first spacer shim (330), a fixing pin (120) inserted into a guide hole (342) of the second spacer shim (340) may also be provided in the first die block (100) for accurate positioning.

[0080] In addition, an insulating liquid supply path for supplying insulating liquid from the outside may be provided on the first die block (100), and correspondingly, an insulating liquid supply hole (334) forming one end of the insulating liquid path (336) may be formed within the first spacer core (330). Considering the sealing of the insulating liquid supplied under pressure, it may be preferable for the insulating liquid supply hole (334) to be formed within the first spacer core (330) that does not move.

[0081] And, the insulating liquid path (336) is formed to extend from the insulating liquid supply hole (334) toward the front of the slot die coater (10), and the gap (S) between the first spacer core (330) and the second spacer core (340) that are open toward the longitudinal direction (MD, Machine Direction) while communicating with the insulating liquid supply hole (334) can form a part of the end of the insulating liquid path (336). Here, the longitudinal direction (MD) is a direction orthogonal to the aforementioned width direction (TD), and corresponds to the direction in which the electrode to which the electrode slurry is applied travels.

[0082] FIG. 5 is a drawing illustrating an example of adjusting the width of the insulating liquid path (336) by the spacer core (320) of FIG. 4. A gap (S) between the first spacer core (330) and the second spacer core (340) open in the longitudinal direction (MD) forms a portion of the end of the insulating liquid path (336). In this insulating liquid path (336) structure, when the second spacer core (340) moves linearly along the width direction (TD), the gap (S) between the first spacer core (330) and the second spacer core (340) open in the longitudinal direction (MD) changes. Consequently, the flow cross-sectional area of ​​the insulating liquid path (336) changes in response to the movement of the second spacer core (340) in the width direction (TD), thereby controlling the degree of spreading of the electrode slurry by adjusting the discharge amount and width of the insulating liquid.

[0083]

[0084] [Second Embodiment]

[0085] FIG. 6 is a drawing illustrating the structure of a spacer shim (320) according to a second embodiment of the present invention. The cotter shim (300) is composed of a body shim (310) and a spacer shim (320), and the spacer shim (320) includes a first spacer shim (330) whose position is fixedly installed with respect to the body shim (310), and a second spacer shim (340) whose position can be moved within the fixedly installed first spacer shim (330), which is the same as the first embodiment. However, in the second embodiment, the movement structure or method of the second spacer shim (340) is different. Hereinafter, descriptions of contents overlapping with those in the first embodiment will be omitted, and descriptions will be made focusing on the movement structure of the second spacer shim (340).

[0086] Referring to FIG. 6, the second spacer core (340) can perform a rotational movement in which the angle of the center line (CL) with respect to the longitudinal direction (MD) changes. Here, the center line (CL) means a virtual line representing the length of the second spacer core (340) along the longitudinal direction (MD). In the second embodiment, the second spacer core (340) can perform a rotational movement in which the center line (CL) changes to be parallel to or inclined with respect to the longitudinal direction (MD).

[0087] Specifically, the first spacer core (330) has a receiving portion (332) with an open front, and the second spacer core (340) is placed inside the receiving portion (332). In addition, the second spacer core (340) has a rotation hole (344) that engages to enable rotational movement with respect to the fixed pin (120) located inside the receiving portion (332). Unlike the first embodiment, the rotation hole (344) has a circular shape corresponding to the cross-sectional shape of the fixed pin (120), and there is only a slight fastening margin that enables rotational movement with respect to the fixed pin (120).

[0088] In this structure, the second spacer core (340) can rotate within a certain angle about the fixed pin (120). Accordingly, the angle of the center line (CL) of the second spacer core (340) with respect to the longitudinal direction (MD) changes. Fig. 7 is a drawing illustrating an example in which the width of the insulating fluid passage (336) is reduced and adjusted by the rotation of the second spacer core (340), and Fig. 8 is a drawing illustrating an example in which the width of the insulating fluid passage (336) is expanded and adjusted, on the contrary. As is clearly understood from the drawing, when the second spacer core (340) rotates in a direction in which the gap (S) with the first spacer core (330) is reduced, the width of the insulating fluid passage (336) is reduced. Conversely, when the second spacer core (340) rotates in a direction that widens the gap (S) with the first spacer core (330), the width of the insulating fluid passage (336) expands. In this way, the flow cross-sectional area of ​​the insulating fluid passage (336) can be changed through the rotational movement of the second spacer core (340).

[0089] According to an embodiment, a rotational contact surface (350) in the shape of an arc with the center of curvature at the center of the fixed pin (120) may be formed between the first spacer core (330) and the second spacer core (340). By the rotational contact surface (350), the rotational movement of the second spacer core (340) can be accurately induced. In addition, by the rotational contact surface (350), the sealing between the first spacer core (330) and the second spacer core (340) can be well maintained regardless of the rotational angle of the second spacer core (340).

[0090] And, as already described in the first embodiment, a fixed pin (120) forming a center of rotation can be provided in the first die block (100), an insulating liquid supply hole (334) for supplying insulating liquid to an insulating liquid path (336) can be formed in the first spacer core (330), and a gap (S) between the first spacer core (330) and the second spacer core (340) that is open toward the longitudinal direction (MD) while communicating with the insulating liquid supply hole (334) can form a part of the end of the insulating liquid path (336).

[0091]

[0092] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. A first die block having a manifold for receiving electrode slurry; a second die block coupled with the first die block; and A coater core interposed between the first die block and the second die block; Including, The above cotter plant, A body core having a shape that surrounds both sides and the rear of the manifold, and a plurality of spacer cores spaced apart from each other so as to extend across the front of the manifold and having a concave insulating fluid path formed on the surface thereof, The above spacer plant, A slot die coater comprising a first spacer core whose position is fixedly installed relative to the body core, and a second spacer core whose position is movable within the first spacer core.

2. In paragraph 1, According to the movement of the position of the second spacer core, A slot die coater in which the cross-sectional area of ​​the insulating liquid flow path is changed.

3. In paragraph 2, The above second spacer plant, A slot die coater capable of linear movement along the transverse direction (TD).

4. In paragraph 3, The above first spacer core has a receiving portion with an open front, A slot die coater, wherein the second spacer core is positioned within the receiving portion and has a guide hole in the form of an elongated hole along the width direction to have a fastening margin for a fixed pin located within the receiving portion.

5. In paragraph 4, The above fixed pin is, A slot die coater provided in the above first die block.

6. In paragraph 3, The insulating liquid supply hole that supplies the insulating liquid to the above insulating liquid path is A slot die coater formed within the first spacer core.

7. In paragraph 6, A slot die coater, wherein a gap between the first spacer core and the second spacer core, which is open in the longitudinal direction (MD, Machine Direction) while communicating with the insulating liquid supply hole, forms a portion of the end of the insulating liquid path.

8. In paragraph 2, The above second spacer plant, A slot die coater capable of performing a rotational motion in which the angle of the center line relative to the longitudinal direction changes.

9. In paragraph 8, The above first spacer core has a receiving portion with an open front, A slot die coater, wherein the second spacer core is positioned within the receiving portion and has a rotation hole that allows rotational movement relative to a fixed pin located within the receiving portion.

10. In paragraph 9, Between the first spacer core and the second spacer core, A slot die coater having a circular arc-shaped rotating contact surface formed with the center of the above-mentioned fixed pin as the center of curvature.

11. In paragraph 9, The above fixed pin is, A slot die coater provided in the above first die block.

12. In paragraph 9, The insulating liquid supply hole that supplies the insulating liquid to the above insulating liquid path is A slot die coater formed within the first spacer core.

13. In paragraph 12, A slot die coater, wherein a gap between the first spacer core and the second spacer core, which are open in the longitudinal direction while communicating with the insulating liquid supply hole, forms a portion of the end of the insulating liquid path.

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