Device for manufacturing all-solid-state battery, and method for manufacturing all-solid-state battery using same

Abstract

The present invention relates to a device for manufacturing an all-solid-state battery, and a method for manufacturing an all-solid-state battery using same. More specifically, the device comprises: a main conveyor; a first electrode supply unit disposed at the entrance of the main conveyor and for supplying electrode webs to the main conveyor; a second electrode supply unit disposed above the main conveyor and for depositing electrode sheets onto the electrode webs; a pressing conveyor disposed on top of the main conveyor and engaged with the main conveyor to transfer the electrode webs and the electrode sheets in a first direction; and a hot pressing unit connected to the main conveyor and the pressing conveyor, wherein the hot pressing unit can press the electrode sheets and the electrode webs interposed between the main conveyor and the pressing conveyor.

Description

All-solid-state battery manufacturing device and all-solid-state battery manufacturing method using the same

[0001] The present invention relates to an all-solid-state battery manufacturing device and an all-solid-state battery manufacturing method using the same, and more specifically, to an all-solid-state battery manufacturing device capable of stably pressing an electrode web and an electrode sheet even during transport by implementing a pressurizing system using a double belt, and to an all-solid-state battery manufacturing method using the same.

[0002]

[0003] Recent industrial demands have led to the active development of batteries with high energy density and safety. Recently, all-solid-state batteries, which replace the electrolyte with a solid electrolyte, have been proposed. All-solid-state batteries are made by laminating a cathode, solid electrolyte, and anode, then pressurizing and densifying them. These batteries utilize solid electrolytes instead of the electrolytes found in conventional secondary batteries. By eliminating the use of flammable organic dispersion media, all-solid-state batteries significantly reduce the risk of fire or explosion in the event of a short circuit. Consequently, these all-solid-state batteries can exhibit high safety.

[0004] All-solid-state monocells are sheet-formed unit cells with anodes and cathodes laminated in a sandwich format. Manufacturing these all-solid-state monocells requires a pressurization process.

[0005] In the pressurization process, both electrodes coated with a solid electrolyte are pressed to activate the solid electrolyte. If it is possible to avoid using auxiliary materials for moving the sheet-shaped electrodes in this pressurization process, the productivity of the all-solid-state battery can be increased and the manufacturing cost can be reduced.

[0006]

[0007] The problem to be solved by the present invention is to provide an all-solid-state battery manufacturing device that can stably pressurize an electrode web and an electrode sheet even during transport by implementing a pressurization system using a double belt.

[0008] Another problem to be solved by the present invention is to provide a method for manufacturing an all-solid-state battery capable of stably pressurizing an electrode web and an electrode sheet even during transport by implementing a pressurizing system using a double belt.

[0009]

[0010] According to the concept of the present invention, an all-solid-state battery manufacturing device comprises: a main conveyor; a first electrode supply unit disposed at an entrance side of the main conveyor, the first electrode supply unit supplying an electrode web to the main conveyor; a second electrode supply unit disposed above the main conveyor, the second electrode supply unit laminating the electrode sheet on the electrode web; a pressurized conveyor disposed above the main conveyor, the pressurized conveyor interlocking with the main conveyor to transport the electrode web and the electrode sheet; and a hot pressurized unit connected to the main conveyor and the pressurized conveyor and disposed, wherein the hot pressurized unit can pressurize the electrode sheet and the electrode web interposed between the main conveyor and the pressurized conveyor.

[0011] According to another concept of the present invention, a method for manufacturing an all-solid-state battery includes: driving an electrode web; laminating an electrode sheet on the electrode web; pressing the electrode web and the electrode sheet; cutting the electrode web to form a unit cell; and discharging the unit cell; wherein pressing the electrode web and the electrode sheet may include driving the electrode web and the electrode sheet between a main transport belt and a pressurizing belt that are vertically adjacent to each other; and applying a linear pressure to the electrode web and the electrode sheet by pressing the main transport belt and the pressurizing belt with a second pressurizing roller and a first pressurizing roller, respectively.

[0012]

[0013] The all-solid-state battery manufacturing device and the all-solid-state battery manufacturing method using the same according to the present invention transmit a pressure to the double belt while transporting the electrode web and the electrode sheet using the double belt, thereby allowing the double belt to press the electrode sheet and the electrode web with a uniform linear pressure.

[0014] This can improve the productivity of the all-solid-state battery manufacturing process and reduce manufacturing costs by eliminating the use of various auxiliary materials used in the existing simple roll-to-roll process.

[0015]

[0016] FIG. 1 is a cross-sectional view illustrating an all-solid-state battery according to embodiments of the present invention.

[0017] FIG. 2 is a drawing for explaining one embodiment of an all-solid-state battery manufacturing device according to embodiments of the present invention.

[0018] FIG. 3 is a drawing for explaining a structure in which an actuator is connected to a second pressure roller in the manufacturing device for an all-solid-state battery disclosed in FIG. 2.

[0019] FIG. 4 is a perspective view illustrating a second electrode supply unit according to embodiments of the present invention.

[0020] FIGS. 5A to 5D are drawings for explaining a state in which a second electrode supply unit according to embodiments of the present invention laminates an electrode sheet on an electrode web.

[0021] FIG. 6 is a drawing for explaining a first guide part according to embodiments of the present invention.

[0022] FIG. 7 is a drawing for explaining a cutting section and a discharge section according to embodiments of the present invention.

[0023] FIG. 8 is a drawing for explaining a state in which a cutting unit according to embodiments of the present invention cuts an electrode web and an electrode sheet.

[0024] FIG. 9 is a drawing for explaining another embodiment of an all-solid-state battery manufacturing device according to embodiments of the present invention.

[0025] FIG. 10 is a drawing for explaining the first and second holes and the adsorption hole according to embodiments of the present invention.

[0026]

[0027] To fully understand the structure and effects of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and subject to various modifications. However, the description of these embodiments is provided solely to ensure a complete disclosure of the present invention and to fully inform those skilled in the art of the invention of the scope of the invention.

[0028] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. Furthermore, in the drawings, the thicknesses of the components are exaggerated for the sake of clarity. Parts designated by the same reference numerals throughout the specification represent the same components.

[0029] Embodiments described herein will be described with reference to cross-sectional and / or plan views, which are ideal illustrations of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for the purpose of effectively explaining the technical contents. Accordingly, the regions illustrated in the drawings have a schematic nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific shapes of regions of the device and are not intended to limit the scope of the invention. Although terms such as first, second, and third are used to describe various components in various embodiments of the present specification, these components should not be limited by such terms. These terms are used only to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

[0030] The terminology used herein is for the purpose of describing embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, the words "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components.

[0031]

[0032] FIG. 1 is a cross-sectional view illustrating an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 1, the all-solid-state battery (10) may include a positive electrode layer (20), a negative electrode layer (30) facing the positive electrode layer (20), and a solid electrolyte layer (40) disposed between the positive electrode layer (20) and the negative electrode layer (30). However, the present invention is not limited thereto, and the all-solid-state battery (10) may further include an additional functional layer, such as an adhesion enhancing layer, disposed between the positive electrode layer (20) and the solid electrolyte layer (40) or between the negative electrode layer (30) and the solid electrolyte layer (40).

[0033] The positive electrode layer (20) may include a positive electrode current collector (21) and a positive electrode active material layer (23) disposed on the positive electrode current collector (21). The positive electrode active material layer (23) may include a positive electrode active material, a solid electrolyte, a conductive material, and a binder.

[0034] The positive electrode current collector (21) can provide a reference surface on which the positive electrode active material layer (23) is arranged. The positive electrode current collector (21) can have a plate or foil shape. For example, the positive electrode current collector (21) can include indium (In), copper (Cu), magnesium (Mg), stainless steel, titanium (Ti), iron (Fe), cobalt (Co), nickel (Ni), zinc (Zn), aluminum (Al), germanium (Ge), lithium (Li), or an alloy thereof.

[0035] Unlike that illustrated in FIG. 1, in one embodiment of the present invention, the positive electrode current collector (21) may be omitted. Although not illustrated, a carbon layer having a thickness of 0.1 μm to 4 μm may be additionally disposed between the positive electrode current collector (21) and the positive electrode active material layer (23) to increase the bonding strength between the positive electrode current collector (21) and the positive electrode active material layer (23).

[0036] The cathode active material may be a material that can reversibly absorb and desorb lithium ions. For example, the cathode active material may include, but is not limited to, lithium transition metal oxides such as lithium cobalt oxide (LCO), lithium nickel oxide, lithium nickel cobalt oxide, lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium manganate, and lithium iron phosphate, nickel sulfide, copper sulfide, lithium sulfide, iron oxide, or vanadium oxide. The cathode active materials may be used alone or as a mixture of two or more thereof.

[0037] Lithium transition metal oxides include, for example, Li a A 1-b B b D2(0.90≤a≤1, 0≤b≤0.5), Li a E 1-b B b O 2-c D c (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05), LiE 2-b B b O 4-c D c (0≤b≤0.5, 0≤c≤0.05), Li a Ni 1-b-c Co b B c D α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni 1-b-c Co b B c O 2-α F α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni 1-b-c Mn b B c D α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α≤2), Li a Ni 1-b-c Mn b B c O 2-α F α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni b E c G d O2(0.90≤a≤1, 0≤b≤0.9, 0≤c≤0.5, 0.001≤d≤0.1), Li a Ni b Co c Mn d GeO2(0.90≤a≤1, 0≤b≤0.9, 0≤c≤0.5, 0≤d≤0.5, 0.001≤e≤0.1), Li a NiG bO2(0.9≤a≤1, 0.001≤b≤0.1), Li a CoG b O2(0.90≤a≤1, 0.001≤b≤0.1), Li a MnG b O2(0.90≤a≤1, 0.001≤b≤0.1), Li a Mn2GbO4(0.90≤a≤1, 0.001≤b≤0.1), QO2, QS2, LiQS2, V2O5, LiV2O5, LiIO2, LiNiVO4, Li 3-f J2(PO4)3(0≤f≤2), Li 3-f It may be a compound represented by any one of Fe2(PO4)3(0≤f≤2), LiFePO4. In these compounds, the capital letter “A” is Ni, Co, Mn, or a combination thereof, the capital letter “B” is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, or a combination thereof, the capital letter “D” is O, F, S, P, or a combination thereof, the capital letter “E” is Co, Mn, or a combination thereof, the capital letter “F” is F, S, P, or a combination thereof, the capital letter “G” is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof, the capital letter “Q” is Ti, Mo, Mn, or a combination thereof, the capital letter “I” is Cr, V, Fe, Sc, Y, or a combination thereof, and the capital letter “J” is V, Cr, Mn, Co, Ni, Cu, or a combination thereof.

[0038] The cathode active material may include, for example, a lithium salt of a transition metal oxide having a layered rock salt type structure among the lithium transition metal oxides described above. The "layered rock salt type structure" is, for example, a cubic rock salt type structure. <111> It is a structure in which oxygen atomic layers and metal atomic layers are alternately and regularly arranged in a direction, and thereby each atomic layer forms a two-dimensional plane. The "cubic rock salt structure" refers to the sodium chloride type (NaCl type) structure, which is a type of crystal structure, and specifically refers to a structure in which the face-centered cubic lattice (fcc) formed by each cation and anion is arranged with a displacement of half of the ridge of the unit lattice. Lithium transition metal oxides having this layered rock salt structure include, for example, LiNi x Co y Al z O2(NCA) or LiNi x Co y Mn z O2(NCM) (0 <x<1,0<y<1, 0<z<1, x+y+z=1) 등의 삼원계 리튬전이금속산화물일 수 있다. 양극 활물질이 층상암염형 구조를 갖는 삼원계 리튬전이금속산화물을 포함하는 경우, 전고체 전지(10)의 에너지 밀도가 커지고 열안정성이 향상될 수 있다.

[0039] The above-described compound included in the positive electrode active material may be covered by a coating layer (not shown). The positive electrode active material may also be a mixture of the above-described compound and a compound to which a coating layer is added. Meanwhile, the coating layer added to the surface of the positive electrode active material may include, for example, an oxide, a hydroxide, an oxyhydroxide, an oxycarbonate, or a hydroxycarbonate of the coating elements below. The compound forming the coating layer may be amorphous or crystalline. The coating elements included in the coating layer may include Mg, Al, Co, K, Na, Ca, Si, Ti, V, Sn, Ge, Ga, B, As, Zr, or mixtures thereof. The coating layer may include, for example, Li2O-ZrO2 (LZO). The method for forming the coating layer may be selected within a range that does not adversely affect the physical properties of the positive electrode active material. The method for forming the coating layer may include, for example, a spray coating method or an immersion method.

[0040] When the positive electrode active material includes nickel (Ni) as a ternary lithium transition metal oxide such as NCA or NCM, for example, the capacity density of the all-solid-state battery (10) can be increased, thereby reducing metal dissolution of the positive electrode active material in a charged state. As a result, the cycle characteristics of the all-solid-state battery (10) in a charged state can be improved. Meanwhile, the “cycle characteristics” are characteristics indicating the degree to which the all-solid-state battery (10) is deteriorated due to charge / discharge of the all-solid-state battery (10). An all-solid-state battery (10) with high cycle characteristics can have a small degree of deterioration of the all-solid-state battery (10) due to charge / discharge, and an all-solid-state battery (10) with low cycle characteristics can have a large degree of deterioration of the all-solid-state battery (10) due to charge / discharge.

[0041] The shape of the positive electrode active material may include particle shapes such as a sphere or an ellipsoid, for example. The particle size and content of the positive electrode active material are not particularly limited.

[0042] The solid electrolyte may include a sulfide-based solid electrolyte having excellent lithium ion conductivity characteristics. Examples of the sulfide-based solid electrolyte include Li2S-P2S5, Li2S-P2S5-LiX (X is a halogen element), Li2S-P2S5-Li2O, Li2S-P2S5-Li2O-LiI, Li2S-SiS2, Li2S-SiS2-LiI, Li2S-SiS2-LiBr, Li2S-SiS2-LiCl, Li2S-SiS2-B2S3-LiI, Li2S-SiS2-P2S5-LiI, Li2S-B2S3, Li2S-P2S5-Z. m S n (m, n are positive numbers, capital letter “Z” represents Ge, Zn or Ga), Li2S-GeS2, Li2S-SiS2-Li3PO4, Li2S-SiS2-Li p MO q (p, q are positive numbers, capital letter “M” is one of P, Si, Ge, B, Al, Ga In), Li 7-x PS 6-x Cl x (0≤x≤2), Li 7-x PS 6-x Br x (0≤x≤2), and Li 7-x PS 6-x I x It may include at least one selected from (0≤x≤2).

[0043] Sulfide-based solid electrolytes include, for example, Li 7-x PS 6-x Cl x (0≤x≤2), Li 7-x PS 6-x Br x (0≤x≤2), and Li 7-x PS 6-x I x(0≤x≤2) may be an argyrodite-type compound including at least one selected from. In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound including at least one selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I. The density of the argyrodite-type solid electrolyte may be 1.5 g / cc to 2.0 g / cc. Since the argyrodite-type solid electrolyte has a density of 1.5 g / cc or more, the internal resistance of the all-solid-state battery is reduced, and the defect of the solid electrolyte membrane being penetrated and short-circuited due to the formation of lithium dendrites can be prevented. The elastic modulus of the solid electrolyte may be, for example, 15 GPa to 35 GPa.

[0044] The solid electrolyte included in the positive active material layer (23) may have a median particle size (D50) smaller than the solid electrolyte included in the solid electrolyte layer (40). For example, the median particle size (D50) of the solid electrolyte included in the positive active material layer (23) may be 90% or less, 80% or less, 70% or less, 60% or less, 50% or less, 40% or less, 30% or less, or 20% or less of the median particle size (D50) of the solid electrolyte included in the solid electrolyte layer (40). Meanwhile, the median particle size (D50) may be a median diameter measured using a laser particle size distribution meter.

[0045] The positive electrode active material layer (23) may include a conductive material. The conductive material may have conductivity without causing a chemical change in the all-solid-state battery (10), thereby increasing the conductivity of the positive electrode active material and the solid electrolyte. The conductive material may include a carbon-based material. The conductive material may include, for example, one or more selected from graphite, carbon black, acetylene black, carbon nanofibers, and carbon nanotubes.

[0046] The positive electrode active material layer (23) may further include a binder. The binder may include a material for binding the positive electrode active material, solid electrolyte, and conductive material included in the positive electrode active material layer (23) and improving the bonding strength of the positive electrode current collector (21). For example, the binder may include polyvinylidene fluoride, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, vinylidene fluoride / hexafluoropropylene copolymer, polyacrylonitrile, or polymethyl methacrylate.

[0047] When the total amount of the positive electrode active material, solid electrolyte, conductive material, and binder is 100 parts by weight, the positive electrode active material layer (23) may include 85 parts by weight to 92 parts by weight of the positive electrode active material. The positive electrode active material layer (23) may include 0.5 parts by weight to 1.5 parts by weight of the binder.

[0048] Within the positive electrode active material layer (23), the conductive material may be present in an amount of 1 to 50 parts by weight relative to 100 parts by weight of the solid electrolyte. If the conductive material is present in an amount less than 1 part by weight relative to 100 parts by weight of the solid electrolyte, the electrical conductivity of the positive electrode active material layer (23) may be reduced. If the conductive material is present in an amount greater than 50 parts by weight relative to 100 parts by weight of the solid electrolyte, the conductive material ratio may be excessively high, and thus a covering layer covering the surface of the solid electrolyte may not be properly formed.

[0049] According to embodiments, the positive electrode active material layer (23) may further include at least one additive selected from the group consisting of a filler, a coating agent, a dispersant, and an ion conductive auxiliary agent in addition to the above-described positive electrode active material, solid electrolyte, conductive agent, and binder.

[0050] The solid electrolyte layer (40) is disposed between the positive electrode layer (20) and the negative electrode layer (30) and may include a sulfide-based solid electrolyte having excellent lithium ion conductivity characteristics. The solid electrolyte included in the solid electrolyte layer (40) may be the same as or different from any one of the materials that may be included in the solid electrolyte included in the positive electrode active material layer (23) described above.

[0051] The solid electrolyte layer (40) of one embodiment may include a sulfide-based solid electrolyte. The sulfide-based solid electrolyte may be manufactured by treating starting materials such as Li2S and P2S5 by a melting rapid cooling method or a mechanical milling method. In addition, a heat treatment may be performed after the treatment. The solid electrolyte may be amorphous, crystalline, or a mixture thereof. In addition, the solid electrolyte may include, for example, at least sulfur (S), phosphorus (P), and lithium (Li) as constituent elements among the above-described sulfide-based solid electrolyte materials. For example, the solid electrolyte may be a material including Li2S-P2S5. When using a sulfide-based solid electrolyte material including Li2S-P2S5 to form the solid electrolyte, the mixing molar ratio of Li2S and P2S5 is, for example, in the range of Li2S:P2S5=50:50 to 90:10.

[0052] Sulfide-based solid electrolytes include, for example, Li 7-x PS 6-x Cl x (0≤x≤2), Li 7-x PS 6-x Br x (0≤x≤2), and Li 7-x PS 6-x I x(0≤x≤2) may be an argyrodite-type compound including at least one selected from. In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound including at least one selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I. The density of the argyrodite-type solid electrolyte may be 1.5 g / cc to 2.0 g / cc. Since the argyrodite-type solid electrolyte has a density of 1.5 g / cc or more, the internal resistance of the all-solid-state battery is reduced, and the defect of the solid electrolyte membrane being penetrated and short-circuited due to the formation of lithium dendrites can be prevented. The elastic modulus of the solid electrolyte is, for example, 15 GPa to 35 GPa.

[0053] The solid electrolyte layer (40) may further include a binder. The binder in the solid electrolyte layer (40) may be, for example, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, etc., but is not limited thereto. The binder of the solid electrolyte layer (40) may be the same as or different from the binder included in the positive electrode active material layer (23) or the binder included in the negative electrode coating layer (33).

[0054] The negative electrode layer (30) may include a negative electrode current collector (31) and a negative electrode coating layer (33) on the negative electrode current collector (31). The negative electrode current collector (31) may provide a reference surface on which the negative electrode coating layer (33) is disposed. The negative electrode current collector (31) may include, for example, a material that does not react with lithium, i.e., does not form an alloy or a compound with lithium. For example, the negative electrode current collector (31) may include at least one metal selected from the group consisting of copper (Cu), stainless steel, titanium (Ti), iron (Fe), cobalt (Co), and nickel (Ni). The thickness of the negative electrode current collector (31) may be 1 μm to 20 μm, more specifically 5 μm to 15 μm, and more specifically 7 μm to 10 μm.

[0055] The negative electrode current collector (31) may be composed of one of the above-described metals, or may include an alloy or coating material of two or more metals. The negative electrode current collector (31) may have, for example, a plate shape or a foil shape. Meanwhile, in one embodiment, the negative electrode current collector (31) may be omitted.

[0056] The negative electrode coating layer (33) can allow lithium metal to grow between it and the negative electrode current collector (31) when the all-solid-state battery (10) is charged. The negative electrode coating layer (33) can act as a protective layer for the lithium metal and simultaneously suppress the precipitation and growth of lithium dendrites.

[0057] The cathode coating layer (33) may include a metal and carbon. For example, the cathode coating layer (33) may include at least one metal selected from the group consisting of gold (Au), platinum (Pt), palladium (Pd), silicon (Si), silver (Ag), aluminum (Al), bismuth (Bi), tin (Sn), and zinc (Zn). The cathode coating layer (33) may include at least one carbon selected from the group consisting of carbon black, acetylene black, furnace black, ketjen black, and graphene. In one embodiment, the cathode coating layer (33) may include a mixture of carbon black and silver (Ag).

[0058] The cathode coating layer (33) may further include additives other than metal and carbon. The cathode coating layer (33) may further include, for example, at least one additive selected from the group consisting of a binder, a filler, a coating agent, a dispersant, and an ion conductive auxiliary agent.

[0059] The negative electrode coating layer (33) may be thinner than the positive electrode active material layer (23). The thickness of the negative electrode coating layer (33) may be, for example, 50% or less, 40% or less, 30% or less, 20% or less, 10% or less, or 5% or less of the thickness of the positive electrode active material layer (23). The thickness of the negative electrode coating layer (33) may be, for example, 1 um to 20 um, 2 um to 10 um, or 3 um to 7 um. If the thickness of the negative electrode coating layer (33) is too thin, lithium dendrites formed between the negative electrode coating layer (33) and the negative electrode current collector (31) may collapse the negative electrode coating layer (33), thereby deteriorating the cycle characteristics of the all-solid-state battery (10). If the thickness of the cathode coating layer (33) increases excessively, the energy density of the all-solid-state battery (10) may decrease and the internal resistance of the all-solid-state battery (10) due to the cathode coating layer (33) may increase, thereby deteriorating the cycle characteristics of the all-solid-state battery (10).

[0060] Meanwhile, although not shown, a carbon layer may be further included to improve adhesion between the cathode coating layer (33) and the solid electrolyte layer (40).

[0061] Hereinafter, with reference to FIGS. 2 to 8, an all-solid-state battery manufacturing device (100) according to embodiments of the present invention will be described. The all-solid-state battery manufacturing device (100) can manufacture the above-described all-solid-state battery (10).

[0062]

[0063] Referring to FIG. 2, the all-solid-state battery manufacturing device (100) according to an embodiment of the present invention may include a first electrode supply unit (310), a feeding unit (320), a main conveyor (210), a second electrode supply unit (400), a pressurizing conveyor (220), a first guide unit (330), a hot pressurizing unit (500), a second guide unit (340), a cutting unit (350), and a discharge unit (360).

[0064] The first electrode supply unit (310) may be arranged at the entrance side of the main conveyor (210). The first electrode supply unit (310) may supply an electrode web (EWB) to the main conveyor (210). The first electrode supply unit (310) may be in the form of an electrode reel, and may unwind the electrode web (EWB) wound on the electrode reel and supply it to the main conveyor (210).

[0065] The electrode web (EWB) may be a notched electrode. Depending on the required design, an electrode that has not undergone the notching process may be introduced. In this case, a notching process facility may be placed between the first electrode supply unit (310) and the feeding unit (320).

[0066] The feeding unit (320) may be arranged between the first electrode supply unit (310) and the second electrode supply unit (400). The feeding unit (320) may guide the electrode web (EWB) toward the main conveyor (210). In other words, the feeding unit (320) may guide the transport direction of the electrode web (EWB) supplied from the first electrode supply unit (310), so that the electrode web (EWB) may be transported toward the main conveyor (210). The feeding unit (320) may include a plurality of rollers. In an embodiment of the present invention, the feeding unit (320) may include a first roller (321) and a second roller (322). The electrode web (EWB) may be guided in the transport direction by the first and second rollers (321, 322) and may be transported toward the main conveyor (210).

[0067] The feeding unit (320) may be equipped with an EPC, a vision system, a dancer, a load cell, etc. according to the required design. The EPC (edge ​​position control) can control the edge position of the electrode web (EWB) to allow the electrode web (EWB) to travel in a designed direction. The vision system can monitor the travel direction of the electrode web (EWB). The dancer can measure the tension of the electrode web (EWB), etc. The load cell can measure necessary information such as tension through the pressure applied by the electrode web (EWB) to the roller.

[0068] The main conveyor (210) may include a main drum (211) and a main transport belt (213). A plurality of main drums (211) may be provided, and the plurality of main drums (211) may be arranged spaced apart from each other along the first direction. Although two main drums (211) are shown in FIG. 2, this is not limited to this, and a different number may be arranged.

[0069] The main transport belt (213) can be connected to a plurality of main drums (211). The main transport belt (213) can form an endless track. Therefore, when the main drum (211) rotates, the main transport belt (213) can move like an endless track along the first direction.

[0070]

[0071] The second electrode supply unit (400) may be placed on the upper portion of the main conveyor (210). The second electrode supply unit (400) may supply the electrode sheet (EST) in the third direction toward the electrode web (EWB).

[0072] In other words, the second electrode supply unit (400) can laminate (or settle) the electrode sheet (EST) on the electrode web (EWB).

[0073] Referring to the following FIGS. 4 and 5a to 5d, a configuration in which the second electrode supply unit (400) laminates an electrode sheet (EST) on an electrode web (EWB) will be described.

[0074]

[0075] Referring to FIG. 4, the second electrode supply unit (400) may include a magazine unit (MAG), a sheet transport unit (STU), a sheet alignment unit (ALU), and a sheet supply unit (TRU).

[0076] In the all-solid-state battery manufacturing facility, the magazine unit (MAG), sheet transport unit (STU), sheet alignment unit (ALU), and sheet supply unit (TRU) may be arranged adjacent to the main conveyor (210).

[0077] A plurality of electrode sheets (EST) can be loaded into a magazine unit (MAG). The magazine unit (MAG) can be configured to sequentially supply a plurality of electrode sheets (EST).

[0078] One embodiment of an electrode sheet (EST) loaded into a magazine unit (MAG) may include an anode layer (20) or a cathode layer (30).

[0079] In another embodiment, the electrode sheet (EST) may include an anode layer (20) or a cathode layer (30) and a solid electrolyte layer (40) formed thereon. For example, the electrode sheet (EST) may include an anode layer (20) and a solid electrolyte layer (40). In this case, the electrode web (EWB) may be the cathode layer (30).

[0080] In another embodiment, referring to FIG. 1, the solid electrolyte layer (40) may include a positive electrode electrolyte layer (41) and a negative electrode electrolyte layer (42). The electrode sheet (EST) may include a positive electrode layer (20) and a positive electrode electrolyte layer (41), or may include a negative electrode layer (30) and a negative electrode electrolyte layer (42). When the electrode web (EWB) includes a negative electrode layer (30) and a negative electrode electrolyte layer (42), the electrode sheet (EST) may include a positive electrode layer (20) and a positive electrode electrolyte layer (41). The positive electrode electrolyte layer (41) of the electrode sheet (EST) is placed on the negative electrode electrolyte layer (42) of the electrode web (EWB) to form the structure of the all-solid-state battery (10) disclosed in FIG. 1.

[0081] The sheet transport unit (STU) may include a sheet picking unit (CPK) and a transfer unit (TFU). The sheet picking unit (CPK) may be configured to pick up electrode sheets (EST) supplied from a magazine unit (MAG). For example, the sheet picking unit (CPK) may include a suction means capable of suctioning the electrode sheets (EST).

[0082] The transfer unit (TFU) may be configured to transfer the picked electrode sheet (EST) to the sheet alignment unit (ALU). For example, the transfer unit (TFU) may take the form of a robotic arm and transfer the electrode sheet (EST) from the magazine unit (MAG) to the sheet alignment unit (ALU).

[0083] The sheet alignment unit (ALU) may include first to fourth alignment stages (ALS1 to ALS4) and a first rotation unit (LOR1). The first rotation unit (LOR1) may have a roller shape or a drum shape that rotates counterclockwise. The first to fourth alignment stages (ALS1 to ALS4) may be arranged at regular intervals along an outer surface of the first rotation unit (LOR1). The first rotation unit (LOR1) may be configured to move the first to fourth alignment stages (ALS1 to ALS4) counterclockwise.

[0084] Each of the first to fourth alignment stages (ALS1-ALS4) may be configured to load an electrode sheet (EST). For example, the electrode sheet (EST) loaded into the first alignment stage (ALS1) may be moved counterclockwise by the first rotation unit (LOR1).

[0085] A first alignment measurement unit (ALV1) may be provided adjacent to the sheet alignment unit (ALU). The first alignment measurement unit (ALV1) may be configured to measure the alignment between the alignment stages (ALS1-ALS4) and the electrode sheet (EST). The first alignment measurement unit (ALV1) may inspect the alignment between the electrode sheet and the alignment stage through vision.

[0086] A sheet supply unit (TRU) may be positioned below the third alignment stage (ALS3). The sheet supply unit (TRU) may include first and second stages (STG1, STG2) and a second rotation unit (LOR2). The second rotation unit (LOR2) may have a roller shape or a drum shape that rotates counterclockwise or clockwise. The first and second stages (STG1, STG2) may be arranged at regular intervals along the outer surface of the second rotation unit (LOR2). The second rotation unit (LOR2) may be configured to rotate the first and second stages (STG1, STG2) so that they are repeatedly flipped up and down.

[0087] Each of the first and second stages (STG1, STG2) may be configured to load an electrode sheet (EST). For example, an electrode sheet (EST) loaded onto the first stage (STG1) from a sheet alignment unit (ALU) may be rotated by a second rotation unit (LOR2) and moved to a position on the second stage (STG2). At this time, the first stage (STG1) and the electrode sheet (EST) may be reversed so that the electrode sheet (EST) faces the electrode web (EWB).

[0088] The sheet supply unit (TRU) can be configured to move in a third direction (D3) in a stamping manner. As the sheet supply unit (TRU) moves downward, the electrode sheet (EST) facing the electrode web (EWB) can be stamped (or transferred) onto the electrode web (EWB).

[0089] A feeding roller (FER) may be provided on one side of each of the first and second stages (STG1, STG2). The feeding roller (FER) may be configured to allow the electrode sheet (EST) provided on the electrode web (EWB) to be smoothly detached from the stages (STG1, STG2).

[0090] The electrode web (EWB) can travel along the first direction (D1). The electrode web (EWB) can be supplied as the electrode reel of the first electrode supply unit (310) is unwound. The electrode web (EWB) can be provided under the sheet supply unit (TRU) while moving along the first direction (D1).

[0091] A second alignment measuring unit (ALV2) may be provided on the electrode web (EWB). The second alignment measuring unit (ALV2) may inspect the alignment of the electrode web (EWB) through vision.

[0092]

[0093] One embodiment of the electrode web (EWB) supplied from the first electrode supply unit (310) may include an anode layer (20) or a cathode layer (30).

[0094] In another embodiment, the electrode web (EWB) may include an anode layer (20) or a cathode layer (30) and a solid electrolyte layer (40) formed thereon. For example, the electrode web (EWB) may include an anode layer (30) and a solid electrolyte layer (40). In this case, the electrode sheet (EST) may be the anode layer (20).

[0095] In another embodiment, referring to FIG. 1, the solid electrolyte layer (40) may include a positive electrode electrolyte layer (41) and a negative electrode electrolyte layer (42). The electrode web (EWB) may include a portion of the positive electrode layer (20) and the positive electrode electrolyte layer (41), or may include a portion of the negative electrode layer (30) and the negative electrode electrolyte layer (42).

[0096] When the electrode sheet (EST) includes a portion of the positive electrode layer (20) and the positive electrode electrolyte layer (41), the electrode web (EWB) may include a portion of the negative electrode layer (30) and the negative electrode electrolyte layer (42). The positive electrode electrolyte layer (41) of the electrode sheet (EST) is placed on the negative electrode electrolyte layer (42) of the electrode web (EWB), thereby forming the structure of the all-solid-state battery (10) disclosed in FIG. 1.

[0097] In the examples described below, the electrode sheet (EST) is exemplified as including an anode layer (20) and the electrode web (EWB) is exemplified as including a cathode layer (30).

[0098] At this time, the solid electrolyte layer (40) may be provided to the anode layer (20) or the cathode layer (30).

[0099] Alternatively, the solid electrolyte layer (40) includes an anode electrolyte layer (41) and a cathode electrolyte layer (42), and the anode electrolyte layer (41) can be provided to the anode layer (20), and the cathode electrolyte layer (42) can be provided to the cathode layer (30).

[0100]

[0101] FIGS. 5A to 5D are drawings for explaining a state in which a second electrode supply unit (400) according to embodiments of the present invention laminates an electrode sheet (EST) on an electrode web (EWB). In this embodiment, a method for manufacturing the all-solid-state battery of FIG. 1 is explained using the second electrode supply unit (400) of FIG. 2 described above.

[0102] Referring to FIG. 5A, an electrode web (EWB) can travel along a first direction (D1). The electrode web (EWB) can include a negative electrode layer (30). Specifically, the electrode web (EWB) can include a negative electrode current collector (31) and a negative electrode coating layer (33) described in FIG. 1. The electrode web (EWB) can further include first electrode tabs (TPP1). The first electrode tabs (TPP1) can be provided at regular intervals along the first direction (D1).

[0103] An electrode sheet (EST) can be provided on an electrode web (EWB) by a sheet supply unit (TEU) of a second electrode supply unit (400) of FIG. 2. The electrode web (EWB) and the electrode sheet (EST) laminated thereon can form a single laminated structure (STS). The laminated structure (STS) can be manufactured into an all-solid-state battery (10) as described in FIG. 1 through a subsequent process.

[0104] Referring again to FIG. 5A, an electrode sheet (EST) may be provided on one side (TS) of a stage (STG). The electrode sheet (EST) may further include a second electrode tab (TPP2). The electrode sheet (EST) may be provided onto the stage (STG) from a sheet alignment unit (ALU). A feeding roller (FER) may be provided on one side of the stage (STG). The feeding roller (FER) may be adjacent to the electrode sheet (EST) in a direction opposite to the first direction (D1).

[0105] Referring to Fig. 5b, the stage (STG) can be rotated and inverted. This allows one side (TS) of the stage (STG) to face the electrode web (EWB). For example, the stage (STG) can be rotated 180 degrees by the second rotation part (LOR2) of Fig. 3. By rotating the stage (STG), the electrode sheet (EST) can be inverted. The inverted electrode sheet (EST) is adjacent to the electrode web (EWB) and can face the electrode web (EWB).

[0106] Referring to FIG. 5c, the stage (STG) can be moved downward so that the electrode sheet (EST) can contact the electrode web (EWB). The electrode sheet (EST) can be laminated (or settled) on the electrode web (EWB).

[0107] Referring to FIG. 5d, the feeding roller (FER) can release the electrode sheet (EST) from the stage (STG) by rotating counterclockwise. Since the electrode web (EWB) moves in the first direction (D1), the feeding roller (FER) can rotate accordingly. As a result, the electrode sheet (EST) can be stably attached on the electrode web (EWB) and move together with the electrode web (EWB) in the first direction (D1).

[0108] The stage (STG) can be rotated and inverted again. This allows one side (TS) of the stage (STG) to be exposed upward again. In other words, the stage (STG) can be returned to the position shown in FIG. 5a. The processes of FIGS. 5a to 5d can then be repeated.

[0109] According to embodiments of the present invention, an electrode sheet (EST) can be stably attached to a moving electrode web (EWB) by stamping an inverted stage (STG) onto the electrode web (EWB). That is, rather than laminating the electrode sheet (EST) by having the stage (STG) track the moving electrode web (EWB), the electrode sheet (EST) can be laminated on the electrode web (EWB) by stamping after the stage (STG) has been inverted. This simplifies the lamination operation and improves the alignment between the electrode web (EWB) and the electrode sheet (EST).

[0110] According to embodiments of the present invention, an electrode sheet (EST) can be stably attached to a moving electrode web (EWB) through a feeding roller (FER) provided on one side of a stage (STG). While the electrode sheet (EST) is transferred from the stage (STG) to the electrode web (EWB), misalignment may occur between the electrode sheet (EST) and the electrode web (EWB) due to the movement of the electrode web (EWB). However, according to the present invention, even when the electrode web (EWB) is moving through the feeding roller (FER), the electrode sheet (EST) can be naturally transferred from the stage (STG) to the electrode web (EWB). As a result, the alignment between the electrode web (EWB) and the electrode sheet (EST) can be improved.

[0111]

[0112] Although not illustrated in the drawing, sealing members may be provided at each end of the laminated structure (STS) after the electrode sheet (EST) is laminated on the electrode web (EWB). The sealing members may cap the first and second electrode tabs (TPP1, TPP2) and simultaneously secure the electrode web (EWB) and the electrode sheet (EST). The sealing members may be configured to maintain alignment between the electrode sheet (EST) and the electrode web (EWB) in a subsequent process. The sealing members may be removed in a subsequent process.

[0113] According to embodiments of the present invention, as a subsequent process, a pressurizing process may be performed on the laminated structure (STS) web-running in the first direction (D1). Through the pressurizing process, the solid electrolyte layer (40) may become dense. Through the pressurizing process, the interfacial resistance between the solid electrolyte layer (40) and the electrode layers (20, 30) may be reduced.

[0114] The second electrode supply unit (400) according to embodiments of the present invention can stably stack an electrode sheet (EST) on an electrode web (EWB) through the above-described configuration.

[0115]

[0116] Referring to FIGS. 2 and 6, the first guide part (330) may be placed between the second electrode supply part (400) and the pressurized conveyor (220). At this time, the first guide part (330) may be placed on the upper part of the main conveyor (210).

[0117] The first guide unit (330) can supply the electrode web (EWB) and the electrode sheet (EST) to the pressurized conveyor (220). In other words, the first guide unit (330) can supply the laminated structure (STS) to the pressurized conveyor (220).

[0118] In this embodiment, the first guide part (330) may include a first drum (332), a first belt (333), and a guide block (335).

[0119] A plurality of first drums (332) may be provided, and the plurality of first drums (332) may be spaced apart from each other along the first direction at the top of the main conveyor (210).

[0120] The first belt (333) can be connected to a plurality of first drums (332) to form an endless track. Therefore, when the first drum (332) rotates, the first belt (333) can rotate in the form of an endless track.

[0121] When the laminated structure (STS) is transferred to the first guide section (330), the laminated structure (STS) can be positioned between the main transport belt (213) and the first belt (333).

[0122] When the main transport belt (213) and the first belt (333) rotate, the laminated structure (STS) can be transported in the first direction toward the pressurized conveyor (220).

[0123] The guide block (335) can be placed between the first belt (333) and the pressurized conveyor (220). When the laminated structure (STS) is transported from the first belt (333) to the pressurized conveyor (220), the guide block can prevent the transport position of the laminated structure (STS) from being distorted.

[0124]

[0125] The pressurized conveyor (220) can be placed above the main conveyor (210). The pressurized conveyor (220) can be interlocked with the main conveyor (210) to transport the electrode web (EWB) and the electrode sheet (EST) in the first direction.

[0126] The pressurized conveyor (220) may include a pressurized drum (221) and a pressurized belt (223). A plurality of pressurized drums (221) may be provided, and the plurality of pressurized drums (221) may be arranged spaced apart from each other along the first direction. Although two pressurized drums (221) are shown in FIG. 2, this is not limited to this, and a different number of pressurized drums may be arranged.

[0127] The pressurizing belt (223) can be connected to a plurality of pressurizing drums (221). The pressurizing belt (223) can form an endless track. Accordingly, when the pressurizing drum (221) rotates, the pressurizing belt (223) can move like an endless track along the first direction.

[0128] Referring to Fig. 2, the pressure belt (223) can be placed on top of the main transport belt (213). The lower part of the laminated structure (STS) can be in contact with the main transport belt (213), and the upper part of the laminated structure (STS) can be in contact with the pressure belt (223).

[0129] The main transport belt (213) and the pressure belt (223) can rotate together to transport the laminated structure (STS) along the first direction.

[0130]

[0131] The hot press section (500) can be arranged and connected to the main conveyor (210) and the pressurizing conveyor (220).

[0132] The hot pressurizing unit (500) can pressurize the electrode sheet (EST) and electrode web (EWB) interposed between the main conveyor (210) and the pressurizing conveyor (220).

[0133] The hot press unit (500) may include a pressurizing unit (510) and a heating unit (530).

[0134] The pressurizing unit (510) can be connected to and arranged in the main conveyor (210) and the pressurizing conveyor (220). The pressurizing unit (510) can pressurize the electrode sheet (EST) and electrode web (EWB) transported in the first direction.

[0135] The pressurizing unit (510) may include an actuator (511), a first pressurizing roller (512), and a second pressurizing roller (514).

[0136] The actuator (511) can move the position of the first pressure roller (512) along the third direction. In an embodiment of the present invention, the actuator (511) may be a hydraulic cylinder, but is not necessarily limited thereto.

[0137] The first pressure roller (512) can be moved toward the pressure belt (223) by the actuator (511) so that the pressure belt (223) presses the electrode sheet (EST) and the electrode web (EWB).

[0138] The first pressure roller (512) may be arranged on the inside of the pressure conveyor (220). The first pressure roller (512) may pressurize the pressure belt (223) toward the main conveyor (210). Accordingly, the pressure belt (223) may apply a linear pressure to the electrode sheet (EST) and the electrode web (EWB).

[0139] The first pressure roller (512) may have a cylindrical shape. Therefore, the first pressure roller (512) can apply a pre-pressure to the object to be pressed. The first pressure roller (512) can apply a pre-pressure (nip pressure) to the electrode sheet (EST) and the electrode web (EWB) through the pressure belt (223) by applying pressure instead of the pressure belt (223). In other words, the pre-pressure can be applied to the electrode sheet (EST) and the electrode web (EWB) running on the main transport belt (213) by the first pressure roller (512) and the pressure belt (223).

[0140]

[0141] Referring to Fig. 2, the second pressure roller (514) may be arranged on the inside of the main conveyor (210). The second pressure roller (514) may be arranged at a position facing the first pressure roller (512) in the third direction. In other words, the first pressure roller (512) and the second pressure roller (514) may be arranged at positions facing each other with the pressure belt (223) interposed therebetween.

[0142] While the first pressure roller (512) presses the upper part of the electrode web (EWB), the second pressure roller (514) can support the lower part of the electrode web (EWB).

[0143] In embodiments of the present invention, a plurality of first pressure rollers (512) may be provided. The plurality of first pressure rollers (512) may be arranged spaced apart from each other along the first direction.

[0144] A plurality of second pressure rollers (514) may be provided. The plurality of second pressure rollers (514) may be arranged spaced apart from each other along the first direction.

[0145] Accordingly, the laminated structure (STS) running on the main transport belt (213) can be pressurized multiple times by the pressurizing belt (223). In other words, the pressurizing belt (223) can apply multiple circuit pressures to the laminated structure (STS).

[0146]

[0147] Referring to FIG. 3, in embodiments of the present invention, the second pressure roller (514) may be connected to the actuator (511). When the second pressure roller (514) is connected to the actuator (511), the second pressure roller (514) may move along the third direction and pressurize the main transport belt (213). The main transport belt (213) may pressurize the lower portion of the electrode sheet (EST) and the electrode web (EWB).

[0148] In the above structure, the first pressure roller (512) can pressurize the pressure belt (223) in the direction of the electrode sheet (EST) and the electrode web (EWB). The second pressure roller (514) can pressurize the main transport belt (213) in the direction of the electrode sheet (EST) and the electrode web (EWB). Accordingly, the pressure belt (223) and the main transport belt (213) can simultaneously apply a linear pressure to the electrode sheet (EST) and the electrode web (EWB).

[0149] In another embodiment of the present invention, since the pressurizing belt (223) and the main transport belt (213) simultaneously pressurize the upper and lower portions of the electrode sheet (EST) and the electrode web (EWB), the solid electrolyte layer (40) of the all-solid-state battery (10) formed by the electrode sheet (EST) and the electrode web (EWB) can become more dense.

[0150]

[0151] Referring to FIGS. 2 and 3, the heating unit (530) can be connected to and arranged on the main conveyor (210) and the pressurized conveyor (220). The heating unit (530) can heat the electrode sheet (EST) and electrode web (EWB) running on the main conveyor (210).

[0152] Heating the electrode sheet (EST) and electrode web (EWB) while pressing can facilitate smoother pressing. This reduces the number of pressurization cycles and power consumption, thereby improving pressurization efficiency.

[0153] The heating unit (530) may include a first heater (531) and a second heater (533).

[0154] The first heater (531) may be placed inside the pressurized conveyor (220). Specifically, it may be placed inside the pressurized belt (223). The first heater (531) may heat the upper portion of the electrode sheet (EST) and the electrode web (EWB).

[0155] The second heater (533) may be placed inside the main conveyor (210). Specifically, it may be placed inside the main transport belt (213). The second heater (533) may heat the lower portion of the electrode sheet (EST) and the electrode web (EWB).

[0156] In an embodiment of the present invention, a plurality of first heaters (531) may be provided. The first heaters (531) may be arranged between a plurality of first pressure rollers (512) along the first direction. A plurality of second heaters (533) may be provided. The second heaters (533) may be arranged between a plurality of second pressure rollers (514) along the first direction.

[0157] Additionally, the first heater (531) and the second heater (533) may be positioned opposite to each other in the third direction. Therefore, the first heater (531) and the second heater (533) may simultaneously heat the upper and lower portions of the laminated structure (STS).

[0158] Through the above hot pressing process, the solid electrolyte layer (40) of the all-solid-state battery (10) formed by the electrode sheet (EST) and the electrode web (EWB) can be made dense. Through the above hot pressing process, the interfacial resistance between the solid electrolyte layer (40) and the electrode layers (20, 30) can be reduced.

[0159] Meanwhile, the number of arrangements, section length, etc. of the first and second heaters (531, 533) can be adjusted to provide a desired amount of heating according to the required design. In addition, the number of arrangements, section length, etc. of the first and second pressure rollers (512, 514) can be adjusted to provide a desired amount of pressure according to the required design.

[0160]

[0161] The second guide part (340) may be placed on the exit side of the main conveyor (210). At this time, the second guide part (340) may be placed on the upper part of the main conveyor (210).

[0162] The second guide section (340) can supply the electrode sheet (EST) and electrode web (EWB) that have passed through the hot pressing section (500) to the cutting section (350).

[0163] In this embodiment, the second guide part (340) may include a second drum (342) and a second belt (343).

[0164] A plurality of second drums (342) may be provided, and the plurality of second drums (342) may be spaced apart from each other along the first direction at the top of the main conveyor (210).

[0165] The second belt (343) can be connected to a plurality of second drums (342) to form an endless track. Therefore, when the second drum (342) rotates, the second belt (343) can rotate in the form of an endless track.

[0166] When the laminated structure (STS) is transferred to the second guide section (340), the laminated structure (STS) can be positioned between the main transport belt (213) and the second belt (343).

[0167] When the main transport belt (213) and the second belt (343) rotate, the laminated structure (STS) can be transported toward the cutting section (350) along the first direction.

[0168]

[0169] Referring to Fig. 7, the cutting unit (350) can be positioned on the outlet side of the second guide unit (340). The cutting unit (350) can cut the electrode web (EWB) for each electrode sheet (EST) unit. The cut electrode sheet (EST) and electrode web (EWB) can be defined as a unit cell. Referring to Fig. 8, the electrode sheet (EST) and electrode web (EWB) can be cut to form a unit cell.

[0170] A pair of support rollers (351) can be placed at the rear end of the cutting section (350). The support rollers (351) can rotate and transport the unit cells toward the discharge section (360).

[0171] The cutting section (350) may be equipped with a vision system, various position sensors, and position adjustment devices for precise position cutting, depending on the required design. The vision system can monitor the position of the stacked structure (STS). The various position sensors and position adjustment devices can measure the position of the stacked structure (STS) and adjust the cutting position.

[0172] The discharge unit (360) may be positioned on the outlet side of the cutting unit (350). The discharge unit (360) may include a transfer unit (361) and a tray (363). The transfer unit (361) may transfer the unit cells to the tray (363), and the unit cells may be loaded onto the tray (363). In another embodiment, the transfer unit (361) may be changed to a conveyor belt type.

[0173]

[0174] Meanwhile, FIGS. 9 and 10 disclose an all-solid-state battery manufacturing device (100) according to another embodiment of the present invention.

[0175] Referring to FIGS. 9 and 10, an all-solid-state battery manufacturing device (100) according to another embodiment of the present invention may include a first electrode supply unit (310), a feeding unit (320), a main conveyor (210), a second electrode supply unit (400), a pressurizing conveyor (220), a first guide unit (330), a hot pressurizing unit (500), a second guide unit (340), a cutting unit (350), and a discharge unit (360). In addition, the device may include a first adsorption unit (334), a second adsorption unit (347), an adsorption unit (540), an upper guide (345), and a lower guide (346).

[0176] The first electrode supply unit (310), feeding unit (320), main conveyor (210), second electrode supply unit (400), pressurized conveyor (220), cutting unit (350), and discharge unit (360) are the same as those described above, so their redundant description is omitted below.

[0177] The first guide portion (330) may further include a first hole (333a) and a first adsorption portion (334).

[0178] The first hole (333a) may be formed by penetrating the first belt (333). A plurality of first holes (333a) may be arranged on the first belt (333). The plurality of first holes (333a) may form a regular pattern on the first belt (333) or may be arranged irregularly.

[0179] The first suction unit (334) may be connected to a plurality of first holes (333a). In particular, the first suction unit (334) may be connected to a plurality of first holes (333a) that are in contact with the laminated structure (STS). When the first suction unit (334) sucks air through the plurality of first holes (333a), the laminated structure (STS) may be brought into close contact with the surface of the first belt (333).

[0180] Accordingly, the first belt (333) can fix the position of the laminated structure (STS), so that the laminated structure (STS) can be accurately transported in the direction of the pressurized conveyor (220).

[0181]

[0182] The hot pressurized part (500) may further include an adsorption hole (230) and an adsorption unit (540).

[0183] The suction hole (230) may be formed by penetrating the pressurized belt (223) and / or the main transport belt (213). Referring to Fig. 10, the suction hole (230) may also be formed in the main transport belt (213) with the same configuration as the suction hole (230) formed in the pressurized belt (223).

[0184] A plurality of suction holes (230) may be arranged on the pressure belt (223) and / or the main transport belt (213). The plurality of suction holes (230) may form a regular pattern on the pressure belt (223) and / or the main transport belt (213) or may be arranged irregularly.

[0185] The adsorption unit (540) may be connected to a plurality of adsorption holes (230). In particular, the adsorption unit (540) may be connected to a plurality of adsorption holes (230) that come into contact with the laminated structure (STS). When the adsorption unit (540) sucks air through the plurality of adsorption holes (230), the laminated structure (STS) may be brought into close contact with the surface of the pressurized belt (223) and / or the main transport belt (213).

[0186] Accordingly, the pressure belt (223) and / or the main transport belt (213) can fix the position of the laminated structure (STS), so that the laminated structure (STS) can be accurately transported in the direction of the second guide part (340).

[0187] In addition, when the first pressure roller (512) presses the pressure belt (223), since the laminated structure (STS) is in close contact with the pressure belt (223), the nip pressure of the pressure belt (223) can be properly transmitted to the laminated structure (STS). Accordingly, the density of the solid electrolyte layer (40) can be improved. In addition, the interface resistance between the solid electrolyte layer (40) and the electrode layers (20, 30) can be reduced.

[0188] Referring to Fig. 10, the adsorption unit (540) may be placed inside the pressurizing belt (223). At this time, the adsorption unit (540) may be placed at a location inside the pressurizing belt (223) where it does not interfere with the first pressurizing roller (512) and the first heater (531). Therefore, the adsorption unit (540) may be placed in a local area of ​​the pressurizing belt (223) where it does not interfere with the first pressurizing roller (512) and the first heater (531). Of course, the present invention is not limited thereto, and may be implemented to be installed over the entire area of ​​the pressurizing belt (223).

[0189] Also, referring to FIG. 9, the adsorption unit (540) may be placed inside the main transport belt (213). At this time, the adsorption unit (540) may be placed at a location inside the main transport belt (213) where it does not interfere with the second pressure roller (514) and the second heater (533). Therefore, the adsorption unit (540) may be placed in a local area of ​​the main transport belt (213) where it does not interfere with the second pressure roller (514) and the second heater (533). Of course, it is not necessarily limited thereto, and may be implemented to be installed over the entire area of ​​the pressure belt (223).

[0190]

[0191] The second guide portion (340) may further include a second hole (343a), a second adsorption portion (347), an upper guide (345), and a lower guide (346).

[0192] The second hole (343a) may be formed by penetrating the second belt (343). A plurality of second holes (343a) may be arranged on the second belt (343). The plurality of second holes (343a) may form a regular pattern on the second belt (343) or may be arranged irregularly.

[0193] The second suction unit (347) may be connected to a plurality of second holes (343a). In particular, the second suction unit (347) may be connected to a plurality of second holes (343a) that are in contact with the laminated structure (STS). When the second suction unit (347) sucks air through the plurality of second holes (343a), the laminated structure (STS) may be brought into close contact with the surface of the second belt (343).

[0194] Accordingly, the second belt (343) can fix the position of the laminated structure (STS), so that the laminated structure (STS) can be accurately transported in the direction of the cutting section (350).

[0195] In another embodiment of the present invention, the second guide portion (340) may include an upper guide (345) and a lower guide (346).

[0196] Referring to FIG. 2, in one embodiment of the present invention, the second guide part (340) may be placed on the upper portion of the main conveyor (210). Referring to FIG. 9, in another embodiment of the present invention, unlike the one embodiment, the second guide part (340) may be placed spaced apart from the exit side of the main conveyor (210) and may be composed of an upper guide (345) and a lower guide (346).

[0197] The lower guide (346) may be arranged at the same height as the main transport belt (213) along the third direction. The upper guide (345) may be arranged above the lower guide (346). Both the upper guide (345) and the lower guide (346) may be in the form of conveyors including a second belt (343) and a second drum (342).

[0198] Additionally, the upper guide (345) may be omitted. When the laminated structure (STS) is introduced into the cutting section (350), it can be transported stably using only the lower guide (346).

[0199]

[0200] Hereinafter, a method for manufacturing an all-solid-state battery using the all-solid-state battery manufacturing device (100) having the above-described configuration will be described.

[0201] A method for manufacturing an all-solid-state battery according to an embodiment of the present invention may include driving an electrode web (EWB), laminating an electrode sheet (EST) on the electrode web (EWB), pressing the electrode web (EWB) and the electrode sheet (EST), cutting the electrode web (EWB) to form a unit cell, and discharging the unit cell.

[0202] The above electrode web (EWB) may be driven by supplying the electrode web (EWB) from the first electrode supply unit (310) to the main conveyor (210). At this time, the feeding unit (320) may guide the electrode web (EWB) so that it is transported toward the main conveyor (210).

[0203] The laminating of the electrode sheet (EST) on the electrode web (EWB) may be performed by the second electrode supply unit (400) laminating the electrode sheet (EST) on the electrode web (EWB). At this time, the electrode web (EWB) is moving along the main conveyor (210), and the second electrode supply unit (400) may laminate the electrode sheet (EST) on the moving electrode web (EWB).

[0204] Pressurizing the electrode web (EWB) and electrode sheet (EST) above can cause the electrode web (EWB) and electrode sheet (EST) to travel between the main transport belt (213) and the pressure belt (223) which are adjacent to each other vertically. When the main drum (211) rotates, the main transport belt (213) can be rotated in an endless track manner, and when the pressure drum (221) rotates, the pressure belt (223) can be rotated in an endless track manner.

[0205] And the second pressure roller (514) and the first pressure roller (512) can apply pressure to the electrode web (EWB) and the electrode sheet (EST) by applying pressure to the main transport belt (213) and the pressure belt (223), respectively. The actuator (511) can be connected to the second pressure roller (514) and the first pressure roller (512), and the main transport belt (213) can be applied by the second pressure roller (514), and the pressure belt (223) can be applied by the first pressure roller (512). Accordingly, the main transport belt (213) and the pressure belt (223) can apply pressure to the electrode web (EWB) and the electrode sheet (EST), respectively.

[0206] In addition, pressurizing the electrode web (EWB) and the electrode sheet (EST) may include heating the upper portion of the electrode web (EWB) and the upper portion of the electrode sheet (EST) with a first heater (531) on a pressurizing belt (223) and heating the lower portion of the electrode web (EWB) and the lower portion of the electrode sheet (EST) with a second heater (533) under the main transport belt (213).

[0207] By heating the electrode sheet (EST) and electrode web (EWB), the pressurization using the main transport belt (213) and the pressurization belt (223) can proceed more smoothly.

[0208] Cutting the electrode web (EWB) to form a unit cell can be done by cutting the pressed electrode sheet (EST) and the electrode web (EWB) into electrode sheet (EST) units using a cutting section (350).

[0209] The above unit cell can be discharged by transporting the unit cell to a transfer device (361) and loading it onto a tray (363).

[0210] The present invention transmits a pressure force to the double belt while transporting the electrode web (EWB) and the electrode sheet (EST) using the double belt as in the above-described configuration and method, thereby enabling the double belt to press the electrode sheet (EST) and the electrode web (EWB) with a uniform linear pressure.

[0211] This can improve the productivity of the all-solid-state battery manufacturing process and reduce manufacturing costs by eliminating the use of various auxiliary materials used in the existing simple roll-to-roll process.

[0212] While embodiments of the present invention have been described with reference to the attached drawings, the present invention may be implemented in other specific forms without altering the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and are not limiting.

Claims

1. Main conveyor; A first electrode supply unit arranged at the entrance side of the main conveyor, the first electrode supply unit supplies an electrode web to the main conveyor; A second electrode supply unit arranged on the upper part of the main conveyor, the second electrode supply unit stacking an electrode sheet on the electrode web; A pressurized conveyor placed on top of the main conveyor, the pressurized conveyor being interlocked with the main conveyor to transport the electrode web and the electrode sheet; and A hot pressurizing unit connected to and arranged in the main conveyor and the pressurizing conveyor is included; An all-solid-state battery manufacturing device in which the hot pressurizing unit presses the electrode sheet and the electrode web interposed between the main conveyor and the pressurizing conveyor.

2. In paragraph 1, The above pressurized conveyor, A plurality of pressurizing drums, wherein the plurality of pressurizing drums are spaced apart from each other along a first direction; and including a pressure belt connected to the plurality of pressure drums; An all-solid-state battery manufacturing device, wherein the above-mentioned pressurizing belt is connected to the plurality of pressurizing drums and configured to rotate in an infinite track shape.

3. In paragraph 2, The above hot pressing part, It includes a pressurizing unit connected to and arranged in the main conveyor and the pressurizing conveyor; An all-solid-state battery manufacturing device, wherein the pressurizing unit is configured to pressurize the electrode sheet and the electrode web running on the main conveyor.

4. In paragraph 3, The above pressurizing unit, actuator; and A first pressure roller connected to the actuator; An all-solid-state battery manufacturing device, wherein the first pressure roller is configured to move in the direction of the pressure belt by the actuator so that the pressure belt presses the electrode sheet and the electrode web.

5. In paragraph 4, The above pressurizing unit, Further comprising a second pressure roller arranged on the inside of the main conveyor; The second pressure roller is positioned opposite to the first pressure roller in the third direction, An all-solid-state battery manufacturing device, wherein the second pressure roller is configured to support the lower portion of the electrode sheet while the first pressure roller presses the upper portion of the electrode web.

6. In paragraph 5, The above second pressure roller is connected to the actuator, An all-solid-state battery manufacturing device, wherein the second pressure roller is configured to move in the direction of the main transport belt by the actuator so that the main transport belt presses the electrode sheet and the electrode web.

7. In paragraph 6, An all-solid-state battery manufacturing device, wherein the first pressure roller and the second pressure roller are positioned opposite to each other along a third direction with the pressure belt and the main conveying belt interposed therebetween.

8. In paragraph 7, The first pressure roller presses the pressure belt in the direction of the electrode sheet and the electrode web, The second pressure roller presses the main transport belt toward the electrode sheet and the electrode web, An all-solid-state battery manufacturing device, wherein the above-mentioned pressure belt and the above-mentioned main transport belt are configured to apply a linear pressure to the above-mentioned electrode sheet and the above-mentioned electrode web.

9. In paragraph 5, The above hot pressing part, It further includes a heating unit connected to and arranged in the main conveyor and the pressurized conveyor; An all-solid-state battery manufacturing device, wherein the heating unit is configured to heat the electrode sheet and the electrode web running on the main conveyor.

10. In paragraph 9, The above heating unit, A first heater disposed inside the pressurized conveyor, the first heater heats the upper portion of the electrode sheet and the electrode web; and A second heater disposed on the inside of the main conveyor; An all-solid-state battery manufacturing device, wherein the second heater is configured to heat the lower portion of the electrode sheet and the electrode web.

11. In paragraph 10, The first heater is provided in plurality, and the plurality of first heaters are arranged between the plurality of first pressure rollers along the first direction, An all-solid-state battery manufacturing device, wherein the second heater is provided in plurality, and the plurality of second heaters are arranged between the plurality of second pressure rollers along the first direction.

12. In paragraph 11, An all-solid-state battery manufacturing device, wherein the first heater and the second heater are positioned opposite to each other in a third direction.

13. In paragraph 4, The above hot pressing part, An adsorption hole formed in the above pressurized belt or the main conveyor belt; and An adsorption unit connected to the above adsorption hole; The above-mentioned adsorption unit is an all-solid-state battery manufacturing device that adsorbs the electrode sheet and the electrode web to the pressurizing belt or the main conveying belt.

14. In paragraph 1, Further comprising a first guide part disposed between the second electrode supply part and the pressurized conveyor; The above first guide part is placed on the upper part of the main conveyor, The above first guide part supplies the electrode web and the electrode sheet to the pressurized conveyor, The above first guide part, A plurality of first drums, wherein the plurality of first drums are arranged at a predetermined interval along a first direction; A first belt connected to the plurality of first drums, the first belt being connected to the plurality of first drums and rotating in an endless track shape; and A guide block disposed between the first belt and the pressurized conveyor; The above guide block is an all-solid-state battery manufacturing device that guides the position of the electrode sheet and the electrode web supplied to the pressurized conveyor.

15. In paragraph 14, The above first guide part, A first hole formed by penetrating the first belt; and including a first adsorption part connected to the first hole; An all-solid-state battery manufacturing device, wherein the first adsorption unit adsorbs the electrode sheet and the electrode web to the first belt.

16. In paragraph 1, Further comprising a second guide part arranged on the exit side of the main conveyor; The second guide section supplies the electrode sheet and the electrode web to the cutting section, The above second guide part, A plurality of second drums, the plurality of second drums being spaced apart from each other at a predetermined interval along the first direction; and a second belt connected to the plurality of second drums; An all-solid-state battery manufacturing device, wherein the second belt is connected to the plurality of second drums and rotates in an infinite track shape.

17. In paragraph 16, The above second guide part, a second hole formed in the second belt; and A second adsorption unit connected to the second hole; An all-solid-state battery manufacturing device, wherein the second adsorption unit adsorbs the electrode sheet and the electrode web to the second belt.

18. In paragraph 16, A feeding unit arranged between the first electrode supply unit and the second electrode supply unit, the feeding unit guiding the electrode web toward the main conveyor, A cutting part arranged on the exit side of the second guide part, the cutting part cutting the electrode sheet and the electrode web to form a unit cell; and Including a discharge unit arranged on the outlet side of the above cutting unit; An all-solid-state battery manufacturing device, wherein the discharge unit is configured to discharge the unit cell.

19. Driving the electrode web; Laminating an electrode sheet on the above electrode web; Pressurizing the electrode web and the electrode sheet; Cutting the electrode web to form a unit cell; and Discharging the above unit cell; Including, but not limited to, Pressurizing the above electrode web and the above electrode sheet, Running the electrode web and the electrode sheet between the main transport belt and the pressure belt, which are adjacent to each other vertically; and Applying a linear pressure to the electrode web and the electrode sheet by applying pressure to the main transport belt and the pressure belt using the second pressure roller and the first pressure roller, respectively; A method for manufacturing an all-solid-state battery, comprising:

20. In paragraph 19, Pressurizing the above electrode web and the above electrode sheet, Heating the upper part of the electrode web and the upper part of the electrode sheet with the first heater on the pressurized belt; and A method for manufacturing an all-solid-state battery, comprising heating the lower portion of the electrode web and the lower portion of the electrode sheet with a second heater under the main conveying belt.

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