Daikota

Abstract

According to an exemplary embodiment, a die coater is provided. The die coater includes a first die including a manifold, a body shim coupled to the first die, and a spacer shim coupled to the first die, the spacer shim including a cover portion extending in a first direction which is the direction in which electrode slurry is discharged from the first die and covering the manifold, and a first projection connected to the cover portion and projecting in a second direction perpendicular to the first direction, the body shim including a body extending in a second direction, a wing connected to the second end of the body, and a second projection projecting in a second direction from the wing.

Description

[Technical Field]

[0001] This invention relates to a die coater.

[0002] This application claims priority under Korean Patent Application No. 10-2024-0051305 dated April 17, 2024, and all content disclosed in the said Korean Patent Application is incorporated herein as part of this specification. [Background technology]

[0003] Unlike primary batteries, rechargeable batteries can be charged and discharged multiple times. Rechargeable batteries are widely used as an energy source for a variety of cordless devices such as handsets, laptops, and cordless vacuum cleaners. In recent years, improvements in energy density and economies of scale have dramatically reduced the manufacturing cost per unit capacity of rechargeable batteries, and as the driving range of battery electric vehicles (BEVs) increases to levels comparable to those of fuel-powered vehicles, the main applications of rechargeable batteries are shifting from mobile devices to mobility.

[0004] The electrodes of a secondary battery are the most important components of the battery in terms of energy density. The electrodes of a secondary battery can be formed through a coating process, a roll pressing process, a drying process, a slitting process, and a notching process. Of these, the coating process involves applying a coating material containing the active material onto the electrode plate, and can be performed by a die coater. [Overview of the project] [Problems that the invention aims to solve]

[0005] The technical problem that this invention aims to solve is to provide a die coater with improved coating performance. [Means for solving the problem]

[0006] According to exemplary embodiments of the present invention for solving the above-mentioned problems, a die coater may be provided. The die coater includes a first die including a manifold, a body shim coupled to the first die, and a spacer shim coupled to the first die, wherein the spacer shim includes a cover portion extending in a first direction which is the direction in which electrode slurry is discharged from the first die and covering the manifold, and a first projection connected to the cover portion and projecting in a second direction perpendicular to the first direction, and the body shim may include a body extending in a second direction, a wing connected to the second end of the body, and a second projection projecting in a second direction from the wing.

[0007] The second projection may protrude toward the cover portion.

[0008] The first projection may protrude toward the wing.

[0009] The first and second protrusions can be staggered.

[0010] The wing includes a first portion connected to the body and extending in a first direction, and a second portion connected to the first portion and extending in a second direction, wherein the second projection may project from the second portion in the second direction.

[0011] The first projection overlaps with the second portion of the wing in a second direction, and the second projection may overlap with the cover portion in a second direction.

[0012] The first projection and the second projection may overlap in the first direction.

[0013] The spacer shim may have a Γ shape.

[0014] The first projection can be connected to the end of the cover portion in the first direction.

[0015] The first protrusion can be separated from the end of the cover portion in the first direction.

[0016] It further includes a fixing pin that fixes the spacer shim to the first die, the spacer shim includes a slot corresponding to the fixing pin, and the length of the slot in the first direction may be longer than the length of the slot in the second direction.

[0017] It further includes a fixing pin that fixes the spacer shim to the first die, the spacer shim includes a slot corresponding to the fixing pin, and the length of the slot in the first direction may be shorter than the length of the slot in the second direction.

[0018] According to an exemplary embodiment, a die bonder is provided. The die bonder includes a first die including a manifold, a body shim coupled to the first die, and a spacer shim coupled to the first die, and the spacer shim may have a Γ shape.

Advantages of the Invention

[0019] According to an exemplary embodiment of the present invention, it is possible to prevent leakage of the electrode slurry due to misalignment between the spacer shim and the body shim, thereby improving the reliability and yield of the coating process.

[0020] The effects obtained from the exemplary embodiments of the present invention are not limited to the above-described effects, and other effects not mentioned can be clearly derived and understood by those having ordinary knowledge in the technical field to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects associated with implementing the exemplary embodiments of the present disclosure can also be derived by those having ordinary knowledge in the technical field from the exemplary embodiments of the present disclosure.

Brief Description of the Drawings

[0021] [Figure 1] An apparatus for manufacturing a secondary battery according to an exemplary embodiment is shown. [Figure 2] It is an exploded perspective view for explaining a die bonder according to an exemplary embodiment. [Figure 3] It is a plan view showing a first die and a shim. [Figure 4]The layout of the body shim and spacer shim according to an exemplary embodiment is shown. [Figure 5] The layout of the body shim and spacer shim according to an exemplary embodiment is shown. [Figure 6] The layout of the body shim and spacer shim according to an exemplary embodiment is shown. [Modes for carrying out the invention]

[0022] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. As a premise, terms and words used herein and in the claims should not be interpreted in a manner limited to their general or dictionary meanings, but rather in a manner consistent with the technical spirit of the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their own invention.

[0023] Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the invention; thus, there may be a variety of equivalents and modifications that can substitute for them at the time of filing.

[0024] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, such detailed description will be omitted.

[0025] Since embodiments of the present invention are provided to give a more complete explanation to an ordinary person, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes and proportions.

[0026] (First Embodiment) Figure 1 shows a secondary battery manufacturing apparatus 10 according to an exemplary embodiment.

[0027] According to an exemplary embodiment, the secondary battery manufacturing apparatus 10 may include a die coater 100 and a roll 200. The die coater 100 may be configured to discharge a coating material. The portion of the die coater 100 from which the coating material is discharged may be referred to as the lip 100L. According to an exemplary embodiment, the die coater 100 may be configured to apply a coating material onto a current collector SB. The coating material may include an electrode slurry.

[0028] Electrode slurries can be used in the manufacture of electrodes for secondary batteries. Electrode slurries can include electrode active materials, conductive materials, binders, and solvents. Electrode slurries can be manufactured by dissolving the electrode active materials, conductive materials, and binders in a solvent. The solvent can disperse the electrode active materials, etc. The solvent can be an aqueous or non-aqueous solvent. The solvent can include any one of the following: dimethyl sulfoxide (DMSO), isopropyl alcohol, N-methylpyrrolidone (NMP), acetone, water, and mixtures thereof. The amount of solvent used can be determined based on the target viscosity of the electrode slurry. Parameters for determining the amount of solvent used include the coating thickness of the electrode slurry, the manufacturing yield, and the workability.

[0029] The positive electrode active material is a substance that can cause an electrochemical reaction. The positive electrode active material can be a lithium transition metal oxide. Examples of positive electrode active materials include layered compounds such as lithium cobalt oxide (LiCoO2) and lithium nickel oxide (LiNiO2) substituted with one or more transition metals; lithium manganese oxide substituted with one or more transition metals; and materials with the chemical formula LiNi 1-y M y Lithium nickel oxide represented by O2 (wherein M is one of Co, Mn, Al, Cu, Fe, Mg, B, Cr, Zn, and Ga, and 0.01 ≤ y ≤ 0.7); Li 1+z Ni 1 / 3 Co 1 / 3 Mn1 / 3 O2, Li 1+z Ni 0.4 Mn 0.4 Co 0.2 Li such as O2 1+z Ni b Mn c Co 1-(b+c+d) M d O (2-e) A e (where -0.5 ≤ z ≤ 0.5, 0.1 ≤ b ≤ 0.8, 0.1 ≤ c ≤ 0.8, 0 ≤ d ≤ 0.2, 0 ≤ e ≤ 0.2, b + c + d < 1, M is any one of Al, Mg, Cr, Ti, Si, and Y, and A is any one of F, P, and Cl) lithium nickel cobalt manganese composite oxide; and chemical formula Li 1+x M 1-y M’ y PO 4-z X z (where M is a transition metal, more specifically, any one of Fe, Mn, Co, and Ni, M’ is any one of Al, Mg, and Ti, X is any one of F, S, and N, - half ≤ x ≤ + half, 0 ≤ y ≤ 0.5, 0 ≤ z ≤ 0.1) and can include any one of olivine - type lithium metal phosphates represented by this formula.

[0030] The negative electrode active material can include carbon such as, for example, non - graphitizable carbon and graphite - based carbon. The negative electrode active material can be, for example, Li x Fe2O3 (0 ≤ x ≤ 1), Li x WO2 (0 ≤ x ≤ 1), Sn x Me 1-x Me’ y O z(Where Me is any one of Mn, Fe, Pb, and Ge, Me' is any one of Al, B, P, Si, Group 1 elements, Group 2 elements, Group 3 elements, and halogens in the periodic table; 0 < x ≤ 1; 1 ≤ y ≤ 3; 1 ≤ z ≤ 8), etc., can include metal composite oxides. The negative electrode active material can include, for example, any one of lithium metal; lithium alloy; silicon-based alloy; and tin-based alloy. The negative electrode active material can include, for example, metal oxides such as SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, and Bi2O5. The negative electrode active material may include, for example, conductive polymers such as polyacetylene; Li-Co-Ni-based materials, etc.

[0031] The conductive material can have conductivity without inducing chemical changes in the ultimately manufactured secondary battery. The conductive material can include, for example, graphite such as natural graphite and artificial graphite; carbon black such as acetylene black, ketjen black, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fibers and metal fibers; metal powders such as carbon fluoride, aluminum, and nickel powder; conductive whiskers such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; polyphenylene derivatives, etc.

[0032] The binder can improve the binding between the active material and the conductive material and the binding force to the electrode plate. The binder can include, for example, polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene-butadiene rubber, fluorine rubber, various copolymers, etc.

[0033] The thickness of the positive electrode current collector can range from approximately 3 μm to approximately 500 μm. The positive electrode current collector may not induce chemical changes in the final manufactured secondary battery and may have high conductivity. The positive electrode current collector may include, for example, one of stainless steel, nickel, titanium, calcined carbon, and aluminum. The positive electrode current collector may include stainless steel surface-treated with carbon, nickel, titanium, and silver, etc. The surface of the positive electrode current collector may include a micro-textured structure to enhance the adhesion of the active material. The shape of the positive electrode current collector may include one of film, sheet, foil, net, porous material, foam, and nonwoven fabric.

[0034] The thickness of the negative electrode current collector can range from approximately 3 μm to approximately 500 μm. The negative electrode current collector may not induce chemical changes in the final manufactured secondary battery and may have high conductivity. The negative electrode current collector may include any one of copper, stainless steel, aluminum, nickel, titanium, calcined carbon, and aluminum-cadmium alloy. The negative electrode current collector may also include stainless steel surface-treated with carbon, nickel, titanium, and silver, etc. The surface of the negative electrode current collector may include a micro-textured structure to enhance the adhesion of the active material. The shape of the negative electrode current collector may include any one of film, sheet, foil, net, porous material, foam, and nonwoven fabric.

[0035] (Second Embodiment) Figure 2 is an exploded perspective view illustrating a die coater 100 according to an exemplary embodiment. In Figure 2, the second die 120 (see Figure 1) is omitted.

[0036] Figure 3 is a plan view showing the first die 110 and shim 130.

[0037] Figure 4 shows the layout of the body shim 131 and spacer shim 133 according to an exemplary embodiment.

[0038] Referring to Figures 1 to 4, the die coater 100 may include a first die 110, a second die 120, a shim 130, a shim holder 141, a shim fixing pin 143, a shim fixing pin 145, and a shim holder 147.

[0039] The first die 110 may include a manifold 111 and an electrode slurry supply passage connected to the manifold 111. The electrode slurry can flow into the manifold 111 through the electrode slurry supply passage. The manifold 111 may be an empty space configured to accommodate the electrode slurry. After the electrode slurry fills the manifold 111, the electrode slurry can be discharged to the outside of the die coater 100. The electrode slurry can be discharged from the manifold 111 to the outside through a slit defined by the shim 130 and land portion 113.

[0040] The manifold 111 may have a well shape having a predetermined depth from the land portion 113. The manifold 111 may include an inclined surface, which allows the electrode slurry to be discharged stably from the die coater 100.

[0041] Shim 130 can be interposed between the first die 110 and the second die 120. The first die 110 can be in contact with the lower surface of shim 130. The second die 120 can be in contact with the upper surface of shim 130. Shim 130 may include a body shim 131 and spacer shims 133, 135, and 137.

[0042] The body shim 131 may be substantially parallel to the X and Y directions, and substantially perpendicular to the Z direction. The body shim 131 may include the body 131B and the wing 131W.

[0043] Body 131B may extend in the Y direction. Body 131B may be a plate having a width in the X direction that is smaller than its length in the Y direction, where the X direction is the direction in which the electrode slurry is discharged, and the Y direction may be substantially perpendicular to the X direction.

[0044] The body 131B may include a plurality of grooves 131G. Each of the plurality of grooves 131G may be located on a side portion of the body 131B parallel to the Y direction that is adjacent to (for example, overlapping with) the manifold 111. Each of the plurality of grooves 131G may be recessed inward from the side portion of the body 131B parallel to the Y direction.

[0045] Multiple grooves 131G can accommodate multiple spacer shims 133, 135, and 137. Multiple grooves 131G can expose a portion of the first die 110. Multiple spacer shims 133, 135, and 137 can be partially inserted into corresponding grooves 131G. Multiple spacer shims 133, 135, and 137 can be fixed to the portion of the first die 110 exposed by the multiple grooves 131G by a fixture 147. The fixture 147 may be, for example, a bolt.

[0046] According to an exemplary embodiment, the Y-direction width of each of the multiple grooves 131G may differ from the Y-direction width of the corresponding spacer shims 133, 135, and 137. According to an exemplary embodiment, the Y-direction width of each of the multiple grooves 131G may be greater than the Y-direction width of the corresponding spacer shims 133, 135, and 137. This allows the multiple grooves 131G to guide the coupling of the spacer shims 133, 135, and 137 and provide the spacer shims 133, 135, and 137 with degrees of freedom in the Y-direction, thereby allowing the position of the spacer shims 133, 135, and 137 to be precisely adjusted in the Y-direction.

[0047] The wings 131W may be connected to the Y-direction end of the body 131B. Each wing 131W may include a first portion 131W1 extending in the X direction and a second portion 131W2 extending in the Y direction. The first portion 131W1 may be connected to the body 131B. The second portion 131W2 may be connected to the first portion 131W1. The body shim 131 may further include a projection 131P projecting in the Y direction from the second portion 131W2 of the wing 131W. This allows each wing 131W to include a stepped structure facing the spacer shim 133. The distance between the projection 131P and the lip 100L may differ from the distance between the projection 131P and the manifold 111. The distance between the projection 131P and the lip 100L may be greater than the distance between the projection 131P and the manifold 111.

[0048] Spacer shims 133, 135, and 137 can be interposed between the wings 131W in the Y direction. Each of the spacer shims 133, 135, and 137 can overlap with each of the wings 131W in the Y direction.

[0049] According to exemplary embodiments, the spacer shim 133 can be adjacent to the Y-direction edge of the shim 130. According to exemplary embodiments, the spacer shim 133 can be adjacent to the wing 131W. According to exemplary embodiments, the spacer shim 133 can be in contact with the wing 131W, but is not limited thereto. Each of the spacer shims 133 may be referred to as an edge spacer shim or as a first spacer shim.

[0050] According to an exemplary embodiment, the spacer shim 135 may be positioned at the center of the shim 130 in the Y direction. According to an exemplary embodiment, the spacer shim 135 may be interposed between the spacer shims 133. The spacer shim 135 may be referred to as the center spacer shim or the second spacer shim.

[0051] According to an exemplary embodiment, a spacer shim 137 can be interposed between spacer shims 133 and 135. Each of the spacer shims 137 may be referred to as an intermediate spacer shim or a third spacer shim.

[0052] The spacer shims 133, 135, and 137 may further include insulating channels for providing a flow path for the insulating slurry. In this case, spacer shim 133 may include one insulating channel, and spacer shims 135 and 137 may each include two insulating channels.

[0053] Spacer shims 133, 135, and 137 can partially cover the manifold 111. Spacer shims 133, 135, and 137 can overlap the manifold 111 in the Z direction. In Figure 3, spacer shims 133, 135, and 137 can divide the manifold 111 into four regions, thereby configuring the die coater 100 to simultaneously form four coating lanes in a single coating process.

[0054] A typical engineer in the industry can easily conceive of die coaters configured to form various numbers of coating lanes, such as 1, 2, 8, 16, and 32, based on what is described herein. In one example, a die coater configured to form 8 coating lanes may include shims comprising 2 edge spacer shims, 1 center spacer shim, and 6 intermediate spacer shims.

[0055] Referring to Figures 2 to 5, the shim holder 141 and the shim fixing pin 143 can be partially inserted into the land portion 113 of the first die 110. The shim holder 141 and the shim fixing pin 143 can be configured to fix the spacer shim 133 to the land portion 113 of the first die 110.

[0056] The shim fixer 141 may be, for example, a bolt. The shim fixing pin 143 may be, for example, a bidirectional pin. Thus, the shim fixing pin 143 may be configured to fix the second die 120 to the shim 130 in addition to the first die 110.

[0057] The shim fixing pin 145 may be a bidirectional pin. This allows the shim fixing pin 145 to be configured to fix the second die 120 to the shim 130 in addition to the first die 110. Each of the spacer shims 133, 135, and 137 may include fastening holes corresponding to the shim fixer 141, shim fixing pin 143, and shim fixer 147 (i.e., the shim fixer 141, shim fixing pin 143, and shim fixer 147 are inserted into and passed through by the shim fixer 141, shim fixing pin 143, and shim fixer 147).

[0058] Each of the spacer shims 133, 135, and 137 may include a slot SL corresponding to a shim fixing pin 145 (i.e., into which the shim fixing pin 145 is inserted and through which the shim fixing pin 145 passes). In this example, the Y-direction length of each slot SL may be greater than the X-direction length of each slot SL, thereby providing a degree of freedom in the Y-direction for the spacer shims 133, 135, and 137 when they are aligned.

[0059] The cover portion 133C can overlap the manifold 111 in the Z direction. The cover portion 133C can cover the manifold 111. The cover portion 133C can divide the manifold 111 into two or more parts.

[0060] Each of the spacer shims 133 may have a substantially Γ shape or a bent shape. Each of the spacer shims 133 may include a cover portion 133C and a projection portion 133P. The cover portion 133C may extend in the Y direction from the body 131B, and the projection portion 133P may be connected to the Y-direction end of the cover portion 133C and extend in the X direction.

[0061] The protrusion 133P can project from the edge of the cover portion 133C (for example, an edge parallel to the X direction). The protrusion 133P can project toward the wing 131W. The protrusion 133P can be connected to the Y-direction end of the cover portion 133C. This allows each of the spacer shims 133 to include a stepped structure facing the second portion 131W2 of the wing 131W.

[0062] The distance between the protrusion 133P and the lip 100L may differ from the distance between the protrusion 133P and the manifold 111. The distance between the protrusion 133P and the lip 100L may be smaller than the distance between the protrusion 133P and the manifold 111.

[0063] The protrusion 131P may be staggered with the protrusion 133P. The protrusion 131P may not overlap with the protrusion 133P in the Y direction. The protrusion 131P may overlap with the cover portion 133C in the Y direction, and the protrusion 133P may overlap with the second portion 131W2 of the wing 131W in the Y direction. The protrusion 131P may overlap with the protrusion 133P in the X direction.

[0064] During the assembly of the die coater 100, the spacer shim 133 is aligned with respect to the X-direction end of the land portion 113. More specifically, during the assembly of the die coater 100, the spacer shim 133 is aligned such that the X-direction end of the spacer shim 133 coincides with the X-direction end of the land portion 113, and such alignment conditions may be referred to as zero-offset conditions.

[0065] If there are manufacturing tolerances between the body shim and the spacer shim, electrode slurry may leak through the space between the body shim and the spacer shim, which reduces the yield and reliability of the coating process.

[0066] Under zero-offset conditions, by adjusting the position of the spacer shim 133 so that the protrusion 131P contacts the cover portion 133C and / or the protrusion 133P contacts the second portion 131W2 of the wing 131W, the protrusions 131P and 133P, which overlap each other in the X direction, can block leakage of the electrode slurry, thereby improving the yield and reliability of the coating process.

[0067] (Third embodiment) Figure 5 shows the layout of the body shim 131 and spacer shim 133' according to another exemplary embodiment.

[0068] Referring to Figure 5, the body shim 131 is substantially the same as the one described with reference to Figures 2 to 4. Similarly, the spacer shim 133' is the same as the spacer shim 133 in Figure 4, except that it includes slot SL' instead of slot SL in Figure 4. The spacer shim 133' can be substituted for the spacer shim 133 in Figures 2 to 4.

[0069] In this example, the cover portion 133C' of the spacer shim 133' may be provided with slots SL', and the length of each slot SL' in the X direction may be greater than the length of each slot SL' in the Y direction, thereby providing a degree of freedom in the X direction for the spacer shims 133', 135, and 137 when they are aligned.

[0070] According to an exemplary embodiment, even if there is a manufacturing tolerance between the body shim and the spacer shim, by adjusting the position of the body shim 131 and / or the spacer shim 133' so that the protrusions 131P and 133P are in contact, the protrusions 131P and 133P, which overlap each other in the X direction, can block leakage of the electrode slurry, thereby improving the yield and reliability of the coating process.

[0071] (Fourth Embodiment) Figure 6 shows the layout of body shims and spacer shims according to an exemplary embodiment.

[0072] Figure 6 shows the layout of the body shim 131' and spacer shim 133'' according to another exemplary embodiment.

[0073] Referring to Figure 6, body shim 131' is substantially the same as body shim 131 described with reference to Figures 2 to 4, except for the position of the protrusion 131P'. Similarly, spacer shim 133'' is the same as spacer shim 133 in Figure 4, except for the position of the protrusion 133P'. Body shim 131' and spacer shim 133'' can be substituted for body shim 131 and spacer shim 133 in Figures 2 to 4.

[0074] The protrusions 131P' may be staggered with the protrusions 133P'. The protrusions 131P' may not overlap with the protrusions 133P' in the Y direction. The protrusions 131P' may overlap with the cover portion 133C in the Y direction, and the protrusions 133P' may overlap with the second portion 131W2 in the Y direction. The protrusions 131P' may overlap with the protrusions 133P' in the X direction.

[0075] The protrusions 131P' and 133P' can have an inverted positional relationship with the protrusion (131P in Figure 4) and the protrusion (133P in Figure 4). The distance between the protrusion 131P' and the lip 100L may differ from the distance between the protrusion 131P' and the manifold 111. The distance between the protrusion 131P' and the lip 100L may be smaller than the distance between the protrusion 131P' and the manifold 111. The protrusion 133P' can be spaced away from the center of the cover portion 133C in the X direction. The distance between the protrusion 133P' and the lip 100L may differ from the distance between the protrusion 133P' and the manifold 111. The distance between the protrusion 133P' and the lip 100L may be larger than the distance between the protrusion 133P' and the manifold 111.

[0076] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, at the time of filing, there may be a variety of equivalents and modifications that can substitute for them.

Claims

1. The first die includes the manifold, A body shim coupled to the first die, Includes a spacer shim coupled to the first die, The spacer shim includes a cover portion that extends in a first direction, which is the direction in which the electrode slurry is discharged from the first die, and covers the manifold, and a first projection portion that is connected to the cover portion and protrudes in a second direction perpendicular to the first direction. The body shim is a die coater comprising a body extending in the second direction, a wing connected to the end of the body in the second direction, and a second projection projecting from the wing in the second direction.

2. The die coater according to claim 1, wherein the second protrusion protrudes toward the cover portion.

3. The die coater according to claim 1, wherein the first protrusion protrudes toward the wing.

4. The die coater according to claim 1, wherein the first protrusion and the second protrusion are staggered.

5. The wing includes a first portion connected to the body and extending in the first direction, and a second portion connected to the first portion and extending in the second direction. The die coater according to any one of claims 1 to 4, wherein the second protrusion protrudes from the second portion in the second direction.

6. The first projection overlaps with the second portion of the wing in the second direction. The die coater according to claim 5, wherein the second protrusion overlaps with the cover portion in the second direction.

7. The die coater according to any one of claims 1 to 4, wherein the first protrusion and the second protrusion overlap in the first direction.

8. The die coater according to any one of claims 1 to 4, wherein the spacer shim has a Γ shape.

9. The die coater according to any one of claims 1 to 4, wherein the first projection is connected to the end of the cover portion in the first direction.

10. The die coater according to any one of claims 1 to 4, wherein the first protrusion is spaced apart from the end of the cover portion in the first direction.

11. The spacer shim further includes a fixing pin that secures the spacer shim to the first die, The spacer shim includes a slot corresponding to the fixing pin, The die coater according to any one of claims 1 to 4, wherein the length of the slot in the first direction is longer than the length of the slot in the second direction.

12. The spacer shim further includes a fixing pin that secures the spacer shim to the first die, The spacer shim includes a slot corresponding to the fixing pin, The die coater according to any one of claims 1 to 4, wherein the length of the slot in the first direction is shorter than the length of the slot in the second direction.

13. The first die includes the manifold, A body shim coupled to the first die, Includes a spacer shim coupled to the first die, The spacer shim has a Γ shape and is die-coated.

Images