Apparatus for manufacturing all-solid-state batteries and method for manufacturing all-solid-state batteries using same

Abstract

The apparatus for manufacturing an all-solid-state batteries according to the present invention comprises: a gasket feed unit comprising a first rotating device; and an upper film removal unit comprising a second rotating device. The first rotating device unwinds gasket structures from a roll into a flat state, each gasket structure comprising a carrier film, a gasket thereon, and a protective film on the gasket. The second rotating device winds the protective film from a flat state into a roll.

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.

[0002] The recent rapid proliferation of battery-powered electronic devices, such as mobile phones, laptops, and electric vehicles, has led to a rapid increase in demand for high-energy density and high-capacity secondary batteries. Accordingly, active research and development is underway to improve the performance of lithium secondary batteries. Lithium secondary batteries are batteries comprising a cathode and anode containing active materials capable of lithium ion intercalation and deintercalation, as well as an electrolyte. They generate electrical energy through oxidation and reduction reactions that occur when lithium ions intercalate and deintercalate at the cathode and anode.

[0003] The problem to be solved by the present invention is to provide a manufacturing device capable of efficiently manufacturing an all-solid-state battery.

[0004] Another problem to be solved by the present invention is to provide a method for efficiently manufacturing an all-solid-state battery using the above-mentioned all-solid-state battery manufacturing device.

[0005] According to the concept of the present invention, an all-solid-state battery manufacturing device comprises a gasket supply unit including a first rotating device, and an upper film removal unit including a second rotating device, wherein the first rotating device is configured to unwind a gasket structure including a gasket and a protective film on the gasket from a roll shape into a plate shape, and the second rotating device is configured to wind the protective film from a plate shape into a roll shape.

[0006] According to another concept of the present invention, an all-solid-state battery manufacturing device comprises a gasket supply unit configured to supply a gasket structure including a gasket having at least one opening, a protective film on the gasket, and an adhesive layer between the gasket and the protective film, an upper film removal unit configured to remove the protective film, a positive electrode supply unit configured to place a positive electrode laminate within the opening, and a negative electrode supply unit configured to place a negative electrode laminate on the gasket and the positive electrode laminate, wherein the gasket supply unit, the upper film removal unit, the positive electrode supply unit, and the negative electrode supply unit are sequentially arranged.

[0007] A method for manufacturing an all-solid-state battery according to another concept of the present invention comprises: supplying a gasket structure including a gasket having at least one opening, an adhesive layer on the gasket, and a protective film on the adhesive layer; removing the protective film; arranging a positive electrode laminate within the opening, and arranging a negative electrode laminate on the adhesive layer, wherein supplying the gasket structure includes unrolling the gasket structure from a roll shape into a plate shape, and removing the protective film includes winding the protective film from a plate shape into a roll shape.

[0008] The all-solid-state battery manufacturing device according to the present invention may include a gasket supply unit configured to supply a gasket together with a carrier film onto the carrier film. The carrier film may be used as a moving substrate on which a cathode laminate may be placed. As a result, the number of processes required during the manufacturing process is reduced, enabling efficient layout design and increasing the productivity per unit area of ​​the all-solid-state battery manufacturing device.

[0009] The all-solid-state battery manufacturing device according to the present invention comprises a gasket supply unit that supplies a gasket structure from a roll form into a plate form, an upper film removal unit that removes a protective film from a plate form into a roll form, and the units can be configured to operate simultaneously. As a result, the layout of the equipment of the all-solid-state manufacturing device subsequent to the units can be efficiently designed.

[0010] The method for manufacturing an all-solid-state battery according to the present invention can efficiently manufacture an all-solid-state battery by using the above-described all-solid-state battery manufacturing device.

[0011] Figure 1 is a plan view of an all-solid-state battery including a gasket structure.

[0012] Figure 2 is a cross-sectional view of an all-solid-state battery taken along line A-A' of Figure 1.

[0013] Figure 3 is a perspective view schematically showing a shape in which a gasket structure is rolled into a roll shape.

[0014] Figure 4 is a plan view of a gasket structure.

[0015] Figure 5 is a cross-sectional view taken along line B-B' of Figure 4.

[0016] Figure 6 is a plan view of a gasket structure.

[0017] Figure 7 is a schematic diagram of an all-solid-state battery manufacturing device according to embodiments of the present invention.

[0018] Figure 8 is a flowchart illustrating a method for manufacturing an all-solid-state battery according to embodiments of the present invention.

[0019] FIG. 9, FIG. 10, FIG. 11, FIG. 12, and FIG. 13 are perspective views illustrating a method for manufacturing an all-solid-state battery according to embodiments of the present invention.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] In this specification, "adhesion" may refer to a state in which different materials are held together by a bonding force between their interfaces. Through adhesion, two materials can adhere to each other and achieve a holding force that prevents them from separating. Adhesion, in a broad sense, may include tackiness.

[0025] In this specification, 'pressure-sensitive adhesion' may refer to a phenomenon (tendency) in which two different objects (excluding gases) attract each other after they come into close proximity or contact. In other words, adhesion may refer to a phenomenon in which some force (or work) is required to separate two different objects (excluding gases) after they come into close proximity or contact. Adhesion may be continuously releasable.

[0026] In this specification, 'viscoelasticity' may refer to a phenomenon in which, when a force is applied to an object, both a non-restoring flow and a restoring elastic deformation occur simultaneously. A material with viscoelasticity can simultaneously exhibit the properties of both a solid and a liquid.

[0027]

[0028] [All-solid-state battery]

[0029] Fig. 1 is a plan view of an all-solid-state battery including a gasket structure. Fig. 2 is a cross-sectional view of the all-solid-state battery taken along line A-A' of Fig. 1.

[0030] Referring to FIGS. 1 and 2, the all-solid-state battery (10) may include a positive electrode layer (100), a negative electrode layer (200), a solid electrolyte layer (300), and a gasket structure (400). The negative electrode layer (200) may face the positive electrode layer (100). The solid electrolyte layer (300) may be disposed between the positive electrode layer (100) and the negative electrode layer (200). The gasket structure (400) may surround the positive electrode layer (100), and the negative electrode layer (200) may be disposed on the gasket structure (400).

[0031] The positive electrode layer (100) of one embodiment may include a positive electrode current collector (110) and a positive electrode active material layer (120) disposed on the positive electrode current collector (110). The positive electrode active material layer (120) may include a positive electrode active material, a solid electrolyte, a conductive material, and a binder.

[0032] The positive electrode current collector (110) can provide a reference surface on which the positive electrode active material layer (120) is arranged. The positive electrode current collector (110) can include a plate or foil including, for example, 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.

[0033] Meanwhile, unlike that illustrated in FIG. 1, in one embodiment of the present invention, the positive electrode current collector (110) 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 (110) and the positive electrode active material layer (120) to increase the bonding strength between the positive electrode current collector (110) and the positive electrode active material layer (120).

[0034] The cathode active material may include a material that can reversibly absorb and desorb lithium ions. The cathode active material may include a plurality of particles. The cathode active material may include, but is not necessarily 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.

[0035] 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 bB c D α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α≤2), Li a Nor 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 Nor 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 Nor 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 b O2(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-fA 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.

[0036] 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” may include, for example, a cubic rock salt type structure. <111> It is a structure in which oxygen atomic layers and metal atomic layers are arranged alternately and regularly in the direction, and each atomic layer thereby 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 zO2(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.

[0037] 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 is 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 is selected within a range that does not adversely affect the physical properties of the positive electrode active material (PAM). The method for forming the coating layer includes, for example, spray coating, dipping, etc.

[0038] 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 (PAM) in a charged state. As a result, the cycle characteristics of the all-solid-state battery (10) in a charged state are improved. Meanwhile, the “cycle characteristics” are characteristics indicating the degree to which the all-solid-state battery (10) is deteriorated by charge / discharge of the all-solid-state battery (10). An all-solid-state battery (10) with high cycle characteristics may 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 may have a large degree of deterioration of the all-solid-state battery (10) due to charge / discharge.

[0039] The positive electrode active material may have a particle shape such as a sphere or an ellipsoid, for example. The particle size and content of the positive electrode active material are not particularly limited.

[0040] The solid electrolyte may have a particle shape. The solid electrolyte may be dispersed between the positive electrode active materials. 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).

[0041] 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 PS6-x I x It may be an argyrodite-type compound including at least one selected from (0≤x≤2). In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound including at least one selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I.

[0042] Alternatively, the sulfide-based solid electrolyte is Li 7-a M a PS 6-c X c It may be an argyrodite-type compound containing (0≤a≤2, (0≤c≤2)), where X may be F, Br, Cl, or a combination thereof. M can be candium (Sc), yttrium (Y), titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), zinc (Zn), cadmium (Cd), mercury (Hg), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), arsenic (As), antimony (Sb), bismuth (Bi), or a combination thereof.

[0043] 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 positive electrode active material layer (120) 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.

[0045] The positive electrode active material layer (120) may further include a binder. The binder may bind the positive electrode active material, the solid electrolyte, and the conductive material within the positive electrode active material layer (120) to each other. The binder may include a material for improving the bonding strength between the positive electrode active material layer (120) and the positive electrode current collector (110). The binder may include, for example, polyvinylidene fluoride, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, vinylidene fluoride / hexafluoropropylene copolymer, polyacrylonitrile, and polymethyl methacrylate.

[0046] Based on 100 parts by weight of the total of the positive electrode active material, the solid electrolyte, the conductive agent, and the binder, the positive electrode active material layer (120) may include 85 parts by weight or more and 92 parts by weight or less of the positive electrode active material. Based on 100 parts by weight of the total of the positive electrode active material (PAM), the solid electrolyte, the conductive agent, and the binder, the positive electrode active material layer (120) may include 0.5 parts by weight or more and 1.5 parts by weight or less of the binder.

[0047] Based on 100 parts by weight of the solid electrolyte, the positive electrode active material layer (120) may include 1 part by weight or more and 50 parts by weight or less of a conductive material. If the conductive material is included in the positive electrode active material layer (120) in an amount of less than 1 part by weight based on 100 parts by weight of the solid electrolyte, the proportion of the conductive material may decrease, thereby lowering the electrical conductivity of the positive electrode active material layer (120). If the conductive material is included in the positive electrode active material layer (120) in an amount of more than 50 parts by weight based on 100 parts by weight of the solid electrolyte, the proportion of the conductive material may be excessively high, so that a covering layer covering the surface of the solid electrolyte may not be properly formed.

[0048] The positive electrode active material layer (120) may further include additives such as fillers, coating agents, dispersants, and ion conductive aids in addition to the above-described positive electrode active material, solid electrolyte, conductive agent, and binder.

[0049] The negative electrode layer (200) may include a negative electrode current collector (210) and a negative electrode coating layer (220) on the negative electrode current collector (210). The negative electrode current collector (210) may provide a reference surface on which the negative electrode coating layer (220) is disposed. The negative electrode current collector (210) 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 (210) 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 (210) may be 1 μm to 20 μm, more specifically 5 μm to 15 μm, and more specifically 7 μm to 10 μm.

[0050] The negative electrode current collector (210) 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 (210) may have, for example, a plate shape or a foil shape. Meanwhile, in one embodiment, the negative electrode current collector (210) may be omitted.

[0051] The negative electrode coating layer (220) can allow lithium metal to grow between it and the negative electrode current collector (210) when the all-solid-state battery (10) is charged. The negative electrode coating layer (220) can act as a protective layer for the lithium metal and simultaneously suppress the precipitation and growth of lithium dendrites.

[0052] The cathode coating layer (220) may include a metal and carbon. For example, the cathode coating layer (220) 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 (220) 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 (220) may include a mixture of carbon black and silver (Ag).

[0053] The cathode coating layer (220) may further include additives other than metal and carbon. The cathode coating layer (220) 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 additive.

[0054] The negative electrode coating layer (220) may have a smaller thickness than the positive electrode active material layer (120). The thickness of the negative electrode coating layer (220) 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 (120). The thickness of the negative electrode coating layer (220) 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 (220) is too thin, lithium dendrites formed between the negative electrode coating layer (220) and the negative electrode current collector (210) may cause the negative electrode coating layer (220) to collapse, thereby deteriorating the cycle characteristics of the all-solid-state battery (10). If the thickness of the cathode coating layer (220) 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 (220) may increase, thereby deteriorating the cycle characteristics of the cell.

[0055] Meanwhile, although not shown, a carbon layer may be further included to improve adhesion between the cathode coating layer (220) and the solid electrolyte layer (300).

[0056] A solid electrolyte layer (300) may be provided between the positive electrode layer (100) and the negative electrode layer (200). The solid electrolyte layer (300) may include a sulfide-based solid electrolyte having excellent lithium ion conductivity characteristics. The solid electrolyte in the solid electrolyte layer (300) may be the same as or different from any one of the materials included in the solid electrolyte in the positive electrode active material layer (120) described above.

[0057] The solid electrolyte layer (300) may include an anode electrolyte layer (310) and a cathode electrolyte layer (320). The anode electrolyte layer (310) may be adjacent to the anode layer (100), and the cathode electrolyte layer (320) may be adjacent to the cathode layer (200).

[0058] The positive electrode electrolyte layer (310) may include a first solid electrolyte, and the negative electrode electrolyte layer (320) may include a second solid electrolyte. Each of the first and second solid electrolytes may have a particle shape such as a sphere or an ellipsoid. Each of the first and second solid electrolytes may include a sulfide-based solid electrolyte. The first and second solid electrolytes may be the same or different. Each of the first and second solid electrolytes 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 containing Li2S-P2S5 to form a solid electrolyte, the mixing molar ratio of Li2S and P2S5 is, for example, in the range of Li2S:P2S5=50:50 to 90:10.

[0059] 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 It may be an argyrodite-type compound including at least one selected from (0≤x≤2). In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound including at least one selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I.

[0060] Alternatively, the sulfide-based solid electrolyte is Li 7-a M a PS 6-c X cIt may be an argyrodite-type compound containing (0≤a≤2, (0≤c≤2)), where X may be F, Br, Cl, or a combination thereof. M can be candium (Sc), yttrium (Y), titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), zinc (Zn), cadmium (Cd), mercury (Hg), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), arsenic (As), antimony (Sb), bismuth (Bi), or a combination thereof.

[0061] 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 first solid electrolyte (SE1) is, for example, 15 GPa to 35 GPa.

[0062] The first and negative electrode electrolyte layers (310, 320) may further include a binder. The binder included in the solid electrolyte layer (300) may be, for example, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, or the like, but is not limited thereto. The binder of the first and negative electrode electrolyte layers (310, 320) may be the same as or different from the binder included in the positive electrode active material layer (120) or the binder included in the negative electrode coating layer (220).

[0063] Referring back to FIGS. 1 and 2, the area of ​​the anode layer (100) and the area of ​​the cathode layer (200) may be different from each other. Specifically, the area of ​​the cathode layer (200) may be larger than the area of ​​the anode layer (100). The anode layer (100) may be completely overlapped within the cathode layer (200).

[0064] In one embodiment of the present invention, the positive electrolyte layer (310) may have substantially the same area as the positive electrolyte layer (100). The negative electrolyte layer (320) may have substantially the same area as the negative electrolyte layer (200). 'Substantially the same area' may be defined as an area in which the difference between two different areas is within 10%.

[0065] Specifically, the positive electrolyte layer (310) may have a first width (WI1) in a first direction (D1). The negative electrolyte layer (320) may have a second width (WI2) in the first direction (D1). The first width (WI1) may be smaller than the second width (WI2). The positive electrolyte layer (310) may have a third width (WI3) in the second direction (D2). The negative electrolyte layer (320) may have a fourth width (WI4) in the second direction (D2). The third width (WI3) may be smaller than the fourth width (WI4).

[0066] An all-solid-state battery (10) can be manufactured by forming a positive electrode laminate of a positive electrode layer (100) and a positive electrode electrolyte layer (310), forming a negative electrode laminate of a negative electrode layer (200) and a negative electrode electrolyte layer (320), and then laminating the positive electrode laminate and the negative electrode laminate.

[0067] The all-solid-state battery (10) may be a mono-cell all-solid-state battery, a bi-cell all-solid-state battery, or a stack-cell all-solid-state battery.

[0068] A mono-cell all-solid-state battery may include a cathode layer, a cathode layer, and a solid electrolyte layer disposed between the cathode layer and the anode layer. The solid electrolyte layer may include the first solid electrolyte layer and the second solid electrolyte layer described above.

[0069] A bi-cell all-solid-state battery may have a structure in which a negative electrode current collector, a negative electrode coating layer, a solid electrolyte layer, a positive electrode active material layer, a positive electrode current collector, a positive electrode active material layer, a solid electrolyte layer, a negative electrode coating layer, and a negative electrode current collector are laminated in that order. The solid electrolyte layer may include the first solid electrolyte layer and the second solid electrolyte layer described above. For example, the bi-cell all-solid-state battery may include two monocells (a first monocell and a second monocell). Each of the first and second monocells may include a positive electrode layer, a negative electrode layer, and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer. The solid electrolyte layer of each of the first and second monocells may include the first solid electrolyte layer and the second solid electrolyte layer described above. The positive electrode layer of the first monocell and the positive electrode layer of the second monocell may face each other.

[0070] A stack-cell solid-state battery may include a plurality of bicells. The stack-cell solid-state battery may further include elastic pads. The stack-cell solid-state battery may have a structure in which bicells and elastic pads are alternately stacked. For example, the stack-cell solid-state battery may have a structure in which elastic pads, bicells, elastic pads, bicells, and elastic pads are stacked in that order.

[0071] The gasket structure (400) can fill the step difference in the side surface of the all-solid-state battery (10) caused by the difference in the area of ​​the negative electrode laminate and the positive electrode laminate. The gasket structure (400) can surround the side surfaces of the positive electrode laminate of the all-solid-state battery (10) along the first and second directions (D1, D2). For example, the thickness of the gasket structure (400) can be substantially the same as the thickness of the positive electrode laminate. Accordingly, even when the negative electrode laminate and the positive electrode laminate having different areas are laminated and pressed, damage to the step difference in the side surface of the all-solid-state battery can be prevented. The term “substantially the same thickness” can be defined as a thickness that can prevent damage to the step difference in the side surface of the all-solid-state battery even when the negative electrode laminate and the positive electrode laminate having different areas are laminated and pressed. The all-solid-state battery (10) including the gasket structure (400) can be manufactured according to the method for manufacturing an all-solid-state battery according to FIGS. 9 to 13, which will be described later.

[0072]

[0073] [Gasket structure]

[0074] Fig. 3 is a perspective view of a gasket structure according to an embodiment of the present invention. Fig. 4 is a plan view of a gasket structure according to embodiments of the present invention. To illustrate the invention more clearly, other components are omitted in Fig. 4 and the gasket is illustrated. Fig. 5 is a cross-sectional view taken along line B-B' of Fig. 4.

[0075] Referring to FIG. 3, the gasket structure (400) may be rolled into a roll shape. Referring to FIG. 4, the gasket structure (400) may be unrolled from the roll shape of FIG. 3 into a plate shape by a pulling force. Referring to FIG. 4 and FIG. 5 together, the gasket structure (400) may include a carrier film (410), a coating layer (420), a gasket (430), an adhesive layer (440), and a protective film (450).

[0076] The carrier film (410) can transport the gasket (430). The carrier film (410) can protect the gasket (430). For example, the carrier film (410) may have adhesiveness. For example, the carrier film (410) may have adhesiveness sufficient to fix the cathode laminate (CST) when it is later placed in the first opening (OP1) of the gasket (430). In addition, the carrier film (410) may have adhesiveness sufficient to fix the gasket (430) by contacting the coating layer (420) coated on the lower surface of the gasket (430). In addition, when the carrier film (410) is later removed, the carrier film (410) may have adhesiveness sufficient to detach the gasket (430) and the cathode laminate (CST). The carrier film (410) may include, for example, polyethylene terephthalate (PET). The components of the carrier film (410) are not limited as long as they can perform the roles described above.

[0077] A gasket (430) may be disposed on a carrier film (410). A coating layer (420) may be disposed between the carrier film (410) and the gasket (430). The coating layer (420) may be, for example, a silicone release coating layer. The coating layer (420) may be formed, for example, by coating a coating material on the lower surface of the gasket (430). The coating layer (420) may have substantially the same shape as the lower surface of the gasket (430).

[0078] The thickness of the gasket (430) may be adjusted so that the sum of the thicknesses of the gasket (430), the adhesive layer (440), and the coating layer (420) is substantially equal to the thickness of the positive electrode laminate (CST). For example, the sum of the thicknesses of the gasket (430), the coating layer (420), and the adhesive layer (440) may be equal to the thickness of the positive electrode laminate. Accordingly, when the positive electrode laminate and the negative electrode laminate are laminated and pressurized, the same pressure may be applied to the gasket structure (400) and the positive electrode laminate. As another example, if there is a need to adjust the pressure applied to the positive electrode laminate, the thickness of the gasket (430) may be changed accordingly. For example, the thickness of the gasket (430) may be 5 μm to 20 μm. For example, the gasket (430) may be a non-woven sheet.

[0079] The gasket (430) may include at least one first opening (OP1). For example, the first opening (OP1) may include a plurality of first openings (OP1) spaced apart from each other in a first direction (D1). The plurality of first openings (OP1) may be spaced apart from each other in the first direction (D1).

[0080] The gasket (430) may have a first line (LN1). The first line (LN1) may be configured to separate the gasket (430) into two parts along the first direction (D1). For example, the first line (LN1) may be at least one of a cutting line or a pre-cut line. For example, the first line (LN1) may be positioned between adjacent ones of the plurality of first openings (OP1).

[0081] The gasket (430) may include a first region (P1) and a second region (P2). The first region (P1) may extend in a first direction (D1). The first region (P1) may include the first opening (OP1) described above. The second region (P2) may be positioned side by side on one side of the first region (P1) in the first direction (D1). The second region (P2) may be a region excluding the first region (P1). The second region (P2) may not include the first opening (OP1). That is, a cell may not be formed in the second region (P2). The second region (P2) may be a flange of the gasket (430). The second region (P2) may be a dummy space in the manufacturing process of an all-solid-state battery to be described later. Dummy space can prevent cell loss.

[0082] A protective film (450) may be placed on the gasket (430). An adhesive layer (440) may be placed between the protective film (450) and the gasket (430).

[0083] The adhesive layer (440) may be completely bonded to the gasket (430). For example, the adhesive layer (440) may cause irreversible physical destruction when separated from the gasket (430). The adhesive layer (440) may have adhesive strength at 15°C to 200°C. For example, the adhesive layer (440) may have adhesive strength at room temperature. For example, the adhesive layer (440) may have adhesive strength at 15°C to 35°C. The adhesive layer (440) may adhere the gasket (430) and the protective film (450) by applying pressure at room temperature. In this case, 'adhesion' may include 'pressure-sensitive adhesion'. The adhesive layer (440) having pressure-sensitive adhesion may have viscoelasticity.

[0084] When the protective film (450) comes into contact with the adhesive layer (440) having viscoelasticity, a certain amount of force may be required to separate the protective film (450) from the adhesive layer (440). The adhesive layer (440) having viscoelasticity can reversibly attach and detach the protective film (450). By applying a certain amount of force to the adhesive layer (440) having viscoelasticity, the adhesive layer (440) can be bonded to the negative electrode laminate (AST). For example, the adhesive layer (440) may include at least one of acrylate and silicone.

[0085] As another example, the adhesive layer (440) may have adhesive strength upon heating. For example, the adhesive layer (440) may have adhesive strength at temperatures ranging from 40°C to 200°C, or from 80°C to 180°C. That is, the adhesive layer (440) does not have adhesive strength at room temperature, but may only have adhesive strength upon heating. By applying heat to the adhesive layer (440), the protective film (450) can be reversibly attached and detached. By contacting the adhesive layer (440) with the negative electrode laminate (AST) and applying heat and pressure, the adhesive layer (440) can be adhered to the negative electrode laminate (AST). Thereafter, when the heat is cooled, the adhesive layer (440) can be completely bonded to the negative electrode laminate and the positive electrode laminate. As an example, the adhesive layer (440) may include paper that has absorbed a surfactant such as polyethylene glycol.

[0086] For example, the adhesive layer (440) may include a second opening (OP2) that coincides with the first opening (OP1). The plurality of second openings (OP2) may be spaced apart from each other in the first direction (D1). The adhesive layer (440) may have a second line (LN2). The second line (LN2) may be configured to separate the adhesive layer (440) into two parts along the first direction (D1). For example, the second line (LN2) may be at least one of a cut line or a precut line. For example, the second line (LN2) may be positioned between adjacent ones of the plurality of second openings (OP2). In a plan view, the first opening (OP1) and the second opening (OP2) may overlap each other. For example, the planar shapes of the first opening (OP1) and the second opening (OP2) may be substantially the same. For example, from a planar perspective, the first line (LN1) and the second line (LN2) may overlap each other. For example, when an external force is applied to the gasket structure (400) along the first direction (D1), the first line (LN1) and the second line (LN2) may separate the gasket (430) and the adhesive layer (440) into two parts.

[0087] The protective film (450) may be placed on a plane defined by a first direction (D1) and a second direction (D2). The second direction (D2) may be perpendicular to the first direction (D1).

[0088] The protective film (450) may be removed later. For example, the protective film (450) may be separated from the adhesive layer (440) and the gasket (430). Accordingly, the protective film (450) may include a material that is separable from the adhesive layer (440) and the gasket (430). For example, the protective film (450) may include at least one selected from the group consisting of polyethylene terephthalate, polypropylene, polymethylpentene, and copolymers thereof. As an example, the protective film (450) may include polyethylene terephthalate and a silicone release coating. The protective film (450) may have a smooth surface. As an example, the surface of the protective film (450) may be smoother than the surface of the adhesive layer (440).

[0089] Both the carrier film (410) and the protective film (450) may not include openings. The carrier film (410) may be positioned below the gasket (430), and the protective film (450) may be positioned above the gasket (430). The carrier film (410) may be advantageous for protecting and transporting the gasket (430). In addition, the protective film (450) may be advantageous for being rolled into a roll during the removal process, as it has a plate shape that does not include openings.

[0090] Fig. 6 is a plan view of a gasket structure. To illustrate the invention more clearly, Fig. 6 omits other components and depicts the gasket. Any details that overlap with those described in Fig. 3 will be omitted for brevity.

[0091] Referring to FIG. 6, the gasket (430) may further include a third opening (OP3) connected to the first opening (OP1). The gasket (430) may have a shape similar to a “U” in a planar view. The planar shape of the coating layer (420) and the planar shape of the adhesive layer (440) may also have shapes substantially identical to the planar shape of the gasket (430). When the gasket (430) includes the third opening (OP3), the manufacturing process of the all-solid-state battery may further include a taping process.

[0092]

[0093] [All-solid-state battery manufacturing device]

[0094] Figure 7 is a schematic diagram illustrating an all-solid-state battery manufacturing device according to embodiments of the present invention.

[0095] Referring to FIG. 7, the all-solid-state battery manufacturing device may include a gasket supply unit (GSU), an upper film removal unit (UEU), a cathode supply unit (CSU), a first passivation film removal unit (PEU1), a cathode supply unit (ASU), a pressurization unit (PRU), a second passivation film removal unit (PEU2), a cell inspection unit (CIU), a lower film removal unit (LEU), and a cell separation unit (SPU).

[0096] A gasket supply unit (GSU) may be configured to supply a gasket structure (400) as described in FIGS. 3 to 6. The gasket supply unit (GSU) may include a first rotation device (RD1) that unwinds the gasket structure (400) wound in a roll shape into a plate shape. The first rotation device (RD1) may rotate in a first rotation direction. The first rotation direction may be clockwise or counterclockwise. A carrier film (410) may be line driven. A coating layer (420), a gasket (430), an adhesive layer (440), and a protective film (450) disposed on the carrier film (410) may move together.

[0097] The upper film removal unit (UEU) may be configured to remove the protective film (450) of the gasket structure (400). The upper film removal unit (UEU) may include a second rotation device (RD2) that rolls the plate-shaped protective film (450) into a roll. The second rotation device (RD2) may rotate in a second rotation direction. The second rotation direction may be opposite to the first rotation direction. For example, when the first rotation direction is clockwise, the second rotation direction may be counterclockwise, and when the first rotation direction is counterclockwise, the second rotation direction may be clockwise. The gasket supply unit (GSU) and the upper film removal unit (UEU) may operate simultaneously. That is, the supply of the gasket structure (400) and the removal of the protective film (450) may be performed simultaneously, rather than in a chronological order. By removing the protective film (450), the upper surface of the adhesive layer (440) may be exposed. Additionally, the upper surface of the carrier film (410) may be exposed from the first opening (OP1) of the gasket (430) and the second opening (OP2) of the adhesive layer (440). The second rotating device (RD2) may be arranged vertically spaced apart from the first rotating device (RDS1) and the gasket structure (400) with each other (see FIG. 9).

[0098] The cathode supply unit (CSU) may be configured to place a cathode stack (CST) on the upper surface of the carrier film (410) through the first opening (OP1) of the gasket (430) and the second opening (OP2) of the adhesive layer (440). A plurality of cathode stacks (CST) may be placed on the carrier film (410). The cathode stacks (CST) may be placed spaced apart from each other. The cathode stacks (CST) may be placed within the first opening (OP1) of the gasket (430) and the second opening (OP2) of the adhesive layer (440). The adhesiveness of the carrier film (410) may fix the cathode stack (CST) when the cathode stack (CST) is placed. The cathode stack (CST) may further include a first protective film placed on the cathode electrolyte layer (310). The first protective film may be a metal film, for example, an aluminum thin film. The first protective film may serve to protect the positive electrolyte layer (310).

[0099] The first protective film removal unit (PEU1) may be configured to remove the first protective film disposed on the positive electrode electrolyte layer (310). The first protective film removal unit (MEU) may include a scraper, a polisher, or a laser to peel off the first protective film. According to some embodiments, the positive electrode supply unit (CSU) and the first protective film removal unit (PEU1) may be configured as a single module.

[0100] An anode supply unit (ASU) may be configured to supply an anode stack (AST). Specifically, the ASU may be configured to stack an anode stack (AST) on a cathode stack (CST). In one embodiment, the anode supply unit (ASU) may be configured to stack a plurality of anode stacks (AST) on different cathode stacks (CST). For example, one anode stack (AST) may be stacked on each of spaced apart cathode stacks (CST). By stacking the anode stack (AST) on the cathode stack (CST) and the gasket structure (400), a cell stack including the anode stack (AST), the cathode stack (CST), and the gasket structure (400) may be formed. The anode supply unit (ASU) may be configured to supply the anode stack (AST) while attaching a second protective film on the cathode current collector (210). The second protective layer may be in the form of a film, for example, a polyethylene terephthalate layer.

[0101] The pressurizing unit (PRU) may be configured to pressurize an object. For example, the pressurizing unit (PRU) may include a pressurizing roller. In one embodiment, the pressurizing unit (PRU) may pressurize cell stacks positioned between the carrier film (410) and the second protective film with a linear pressure to form a plurality of monocells. The pressurizing unit (PRU) may be configured to perform a heating process simultaneously when pressing the object. In other words, the pressurizing unit (PRU) may perform both a pressurizing and a heating process. For example, the pressurizing unit (PRU) may utilize a hydraulic method or a servo motor method.

[0102] The second protective film removal unit (PEU2) may be configured to recover the second protective film on the plurality of monocells (MNC). For example, the second protective film removal unit (PEU2) may have the form of a robot arm capable of gripping and transporting the second protective film in a film form. Alternatively, the second protective film removal unit (PEU2) may have the form of an adsorber capable of adsorbing and transporting the second protective film in a film form. Through this, the upper film on the plurality of monocells may be removed. According to some embodiments, the attachment of the second protective film to the cathode supply unit (ASU) may be omitted, and in this case, the second protective film removal unit (PEU2) may be omitted.

[0103] The Cell Inspection Unit (CIU) can inspect monocells for defects. For example, the presence of defects in monocells can be confirmed through vision. The discharge unit can be configured to discharge defective monocells from the inspection unit. This allows only good monocells to be selected. In some embodiments, the Cell Inspection Unit (ICU) can be omitted.

[0104] A lower film recovery unit (LDU) may be configured to recover the carrier film (410). A plurality of monocells may run continuously.

[0105] The separation unit (SPU) may be configured to separate a plurality of monocells connected by a gasket structure (400). For example, the separation unit (SPU) may separate the gasket structure (400) by increasing the gap between the monocells. Through this, the plurality of monocells connected by the gasket structure (400) may be separated. In one embodiment, the separation unit (SPU) may include a plurality of adsorbers capable of adsorbing a plurality of monocells. Each of the adsorbers may be configured to adsorb a monocell. The adsorbers may separate the monocells by moving left and right while adsorbing the monocells. In another embodiment, the separation unit (SPU) may include a plurality of gripping portions capable of gripping the plurality of monocells. The gripping portions may separate the monocells by moving left and right while gripping the monocells.

[0106] According to one concept of the present invention, the all-solid-state battery manufacturing device can be configured such that the gasket supply unit, the upper film removal unit, the positive electrode supply unit, and the negative electrode supply unit are arranged sequentially.

[0107] According to another concept of the present invention, the gasket supply unit can use a carrier film as a running substrate and supply gaskets together on the carrier film. In the present specification, the running substrate refers to a substrate on which a lamination process necessary for forming a cell stack is performed while continuously moving along a manufacturing path. That is, as described above, a cathode stack can be placed on the carrier substrate. The all-solid-state battery manufacturing device according to the comparative example can use a lower film or lower belt other than the carrier film as a running substrate. In this case, a unit for feeding a separate gasket and a unit for removing the carrier film used when feeding a gasket may be additionally required. The present invention can reduce the number of required units and processes compared to the all-solid-state manufacturing device according to the comparative example. As a result, the layout of the equipment of the all-solid-state manufacturing device can be designed efficiently.

[0108] According to another concept of the present invention, the gasket supply unit supplies the gasket structure from a roll form to a plate form, the upper film removal unit removes the protective film from a plate form to a roll form, and the units are configured to operate simultaneously, so that the layout of the equipment of the all-solid-state manufacturing device after the units can be efficiently designed.

[0109]

[0110] [Method for manufacturing an all-solid-state battery]

[0111] Figure 8 is a flowchart of a method for manufacturing an all-solid-state battery according to embodiments of the present invention. The method for manufacturing an all-solid-state battery according to embodiments of the present invention can utilize the gasket structure (400) described above. Furthermore, the method for manufacturing an all-solid-state battery according to embodiments of the present invention can utilize the all-solid-state battery manufacturing apparatus described above.

[0112] Figures 9 to 13 are perspective views illustrating a method for manufacturing an all-solid-state battery according to the present invention. The all-solid-state battery manufacturing method according to the present invention can utilize the all-solid-state battery manufacturing device described above with reference to Figure 7.

[0113] Referring to FIG. 8, a method for manufacturing an all-solid-state battery may include supplying a gasket structure (S100), removing a protective film (S200), placing a positive electrode laminate on a carrier film (S300), placing a negative electrode laminate on an adhesive layer, pressing the cell laminates (S500), and separating mono cells (S600).

[0114] Referring to FIGS. 8 and 9, a gasket structure (400) can be supplied (S100). Specifically, the gasket structure (400) can be supplied in a roll form by a gasket supply unit (GSU). The roll-shaped gasket structure (400) can be supplied by being unwound in a plate form by a first rotating device (RD1) that rotates in a first rotational direction (DR1). A carrier film (410) can serve as a driving substrate. A protective film (450) of the gasket structure (400) can be removed by an upper film removal unit (PEU) at the same time as the gasket structure (400) is supplied. Specifically, the plate-shaped protective film (450) can be removed by being wound in a roll form by a second rotating device (RD2) that rotates in a second rotational direction (DR2). As the protective film (450) is removed, the upper surface of the adhesive layer (440), the first opening (OP1) of the gasket (430) not covered by the adhesive layer (440), and the upper surface of the carrier film (410) not covered by the gasket (430) may be exposed.

[0115] Referring to FIGS. 8 and 10, a cathode stack (CST) may be disposed on a carrier film (410) (S300). Specifically, the cathode stacks (CST) may be disposed on an upper surface of the carrier film (410) exposed by a first opening (OP1). The cathode stacks (CST) may be supplied by a cathode supply unit (CSU). The carrier film (410) is adhesive, so that the cathode stacks (CST) may be fixed. When the cathode stack (CST) includes a first protective film, the method for manufacturing an all-solid-state battery may further include removing the first protective film (e.g., an aluminum film) on the cathode electrolyte layer (310). In one embodiment, the metal thin film may be removed by using a scraper, a polisher, or laser irradiation to expose the cathode electrolyte layer (310).

[0116] Referring to FIGS. 8 and 11, the method may include placing a negative electrode stack (AST) on an adhesive layer (440) (S400). The placing of the negative electrode stack (AST) may be performed by an negative electrode supply unit (ASU). The negative electrode stack (AST) may be placed on the positive electrode stack (CST). By placing the negative electrode stack (AST) on the positive electrode stack (CST) and the gasket structure (400), a cell stack (STS) including them may be formed. The method for manufacturing an all-solid-state battery may further include forming a second protective film on the negative electrode current collector (210). The second protective film may be, for example, a film including polyethylene terephthalate.

[0117] Referring to FIGS. 8 and 12, the cell stacks (STS) can be pressurized (S500). The cell stacks (STS) can be connected by a gasket structure (400). When the first line (LN1) of the gasket (430) is a cut line, the cell stacks (STS) can share one gasket structure (400) having four internal holes (INH). The cell stacks (STS) can be pressurized using a pressurizing unit (PRU). The cell stacks (STS) can be pressurized with a pressure. For example, the cell stacks (STS) located between the carrier film (410) and the second protective film can be pressurized by passing through a pressurizing roller together with the carrier film (410) and the second protective film. As a result of the pressing, the cell stack can be activated and the contact area between the positive electrolyte layer (310) and the negative electrolyte layer (320) can increase. The method for manufacturing an all-solid-state battery can further include removing the second protective film after passing through the cell pressing roller. Removing the second protective film can be achieved by separating the two parts of the second protective film from the negative electrode stack (AST) by applying force in different directions after gripping them.

[0118] The method for manufacturing an all-solid-state battery may further include inspecting the monocells (MNCs) for defects. In one embodiment, the inspection for defects may be performed using the described cell inspection unit (CIU). For example, the presence of defects in the monocells (MNCs) may be confirmed through vision.

[0119] Next, the carrier film (410) can be removed. Removing the carrier film (410) can be performed by a lower film removal unit (LEU). By removing the carrier film (410), only mono cells (MNC) including a gasket structure (400) including a coating layer (420), a gasket (430), and an adhesive layer (440) can remain.

[0120] Referring to FIGS. 9 and 13, mono cells (MNC) can be separated (S600). Separating the mono cells (MNC) can be performed by a cell separation unit (SPU). Separating the mono cells (MNC) can be performed by applying an external force to the mono cells (MNC) to separate the gaskets (430). The mono cells (MNC) of the gaskets (430) can be separated along the first line (LN1).

[0121] 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, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. A gasket supply unit including a first rotating device; and Includes an upper film removal unit including a second rotating device, The first rotating device is configured to unroll a gasket structure including a carrier film, a gasket on the carrier film, and a protective film on the gasket from a roll shape into a plate shape, An all-solid-state battery manufacturing device wherein the second rotating device is configured to wind the protective film from a plate shape into a roll shape.

2. In paragraph 1, An all-solid-state battery manufacturing device, wherein the first rotating device and the second rotating device are configured to rotate in opposite directions.

3. In paragraph 1, An all-solid-state battery manufacturing device, wherein the first rotating device and the second rotating device are configured to rotate simultaneously.

4. In paragraph 1, An all-solid-state battery manufacturing device in which the first rotating device and the second rotating device are spaced apart vertically with the gasket structure interposed therebetween.

5. In paragraph 1, The above gasket supply unit is an all-solid-state battery manufacturing device configured to use the carrier film as a driving substrate.

6. In paragraph 1, The above gasket structure further includes an adhesive layer disposed between the protective film and the gasket, wherein the gasket includes at least one opening, An all-solid-state manufacturing device wherein the second rotating device is configured to expose the adhesive layer and the opening.

7. In paragraph 6, Including an additional positive supply unit, An all-solid-state manufacturing device wherein the anode supply unit is configured to place the anode laminate on the carrier film.

8. In paragraph 6, Including a cathode supply unit, An all-solid-state battery manufacturing device wherein the above-mentioned negative electrode supply unit is configured to place a negative electrode laminate on the above-mentioned adhesive layer.

9. In paragraph 6, Further comprising a lower film removal unit, An all-solid-state battery manufacturing device wherein the lower film removal unit is configured to remove the carrier film.

10. A gasket supply unit configured to supply a gasket structure, the gasket structure including a carrier film, a gasket on the carrier film, a protective film on the gasket, and an adhesive layer between the gasket and the protective film; An upper film removal unit configured to remove the above protective film; An anode supply unit configured to place a cathode laminate on the carrier film; and A cathode supply unit configured to place a cathode laminate on the gasket, An all-solid-state battery manufacturing device in which the gasket supply unit, the upper film removal unit, the positive electrode supply unit, and the negative electrode supply unit are sequentially arranged.

11. In paragraph 10, The gasket comprises at least one opening, An all-solid-state battery manufacturing device in which the positive electrode supply unit is configured to place the positive electrode laminate within the opening.

12. In paragraph 10, The above gasket supply unit includes a first rotating device configured to release the gasket from a roll form into a plate form, An all-solid-state battery manufacturing device, wherein the upper film removal unit includes a second rotating device configured to roll the protective film into a roll shape.

13. In paragraph 10, An all-solid-state battery manufacturing device wherein the cathode supply unit is configured to bond the cathode laminate to the adhesive layer.

14. Supplying a gasket structure comprising a carrier film, a gasket including at least one opening on the carrier film, an adhesive layer on the gasket, and a protective film on the adhesive layer; Removing the above protective film; Placing a bipolar laminate within the above opening; and Including placing a cathode laminate on the above adhesive layer, Supplying the above gasket structure includes unrolling the gasket structure from a roll form into a plate form, A method for manufacturing an all-solid-state battery, wherein removing the protective film comprises winding the protective film from a plate shape into a roll shape.

15. In paragraph 14, A method for manufacturing an all-solid-state battery, wherein the cathode laminate is placed after the anode laminate is placed.

16. In paragraph 14, Unwinding the gasket structure from a roll form to a plate form includes pulling the gasket structure in a first rotational direction, Winding the protective film from a plate shape into a roll shape includes pulling the protective film in a second rotational direction, A method for manufacturing an all-solid-state battery, wherein the first rotation direction and the second rotation direction are opposite to each other.

17. In paragraph 14, A method for manufacturing an all-solid-state battery, wherein supplying the above gasket structure and removing the above protective film are performed simultaneously.

18. In paragraph 14, A method for manufacturing an all-solid-state battery, wherein the placing of the positive electrode laminate comprises placing the positive electrode laminate in contact with the upper surface of the carrier film.

19. In paragraph 18, A method for manufacturing an all-solid-state battery, wherein removing the protective film comprises exposing the upper surface of the adhesive layer and the upper surface of the carrier film.

20. In paragraph 14, A method for manufacturing an all-solid-state battery, wherein supplying the gasket structure and removing the protective film are performed before arranging the positive electrode laminate and arranging the negative electrode laminate.

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