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

Abstract

The present invention relates to an apparatus for manufacturing an all-solid-state battery and, more specifically, comprises: a monocell transfer unit which transfers a stacked sheet in a first direction, wherein the stacked sheet includes an electrode sheet, an adhesive sheet, and an adhesive layer that is between the electrode sheet and the adhesive sheet, the electrode sheet comprising a plurality of monocells; a peeling unit for separating the adhesive sheet from the electrode sheet; and a recovery unit for recovering the adhesive sheet that has been peeled off by the peeling unit, wherein the peeling unit comprises: a gripper for gripping the adhesive sheet on the electrode sheet; and a rotating unit which rotates the gripper so as to wind the adhesive sheet and peel the adhesive sheet from the electrode sheet.

Description

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

[0001] The present invention relates to an apparatus for manufacturing an all-solid-state battery and a method for manufacturing an all-solid-state battery using the same.

[0002]

[0003] Recently, driven by industrial demands, the development of batteries with high energy density and safety is actively underway. For example, lithium-ion batteries are being commercialized not only in the fields of information and communication devices but also in the automotive sector. In the automotive sector, safety is considered particularly important because it is directly related to human life.

[0004] Recently, all-solid-state batteries in which liquid electrolytes are replaced with solid electrolytes have been proposed. By not using flammable organic dispersion media, all-solid-state batteries can significantly reduce the likelihood of fire or explosion in the event of a short circuit. Therefore, these all-solid-state batteries can offer significantly higher safety compared to lithium-ion batteries that use liquid electrolytes.

[0005]

[0006] The problem that the present invention aims to solve is to provide a manufacturing apparatus that facilitates the adhesive sheet removal process when manufacturing an all-solid-state battery by a winding method.

[0007] Another problem that the present invention aims to solve is to provide a device capable of winding and peeling an adhesive film.

[0008] Another problem that the present invention aims to solve is to provide a method for efficiently manufacturing an all-solid-state battery through a series of continuous processes using the all-solid-state battery manufacturing apparatus.

[0009]

[0010] A solid-state battery manufacturing apparatus according to the concept of the present invention comprises: a monocell transfer unit configured to transfer a laminated sheet in a first direction, wherein the laminated sheet comprises an electrode sheet including a plurality of monocells, an adhesive sheet, and an adhesive layer between the electrode sheet and the adhesive sheet; a peeling unit configured to separate the adhesive sheet from the electrode sheet; and a recovery unit configured to recover the adhesive sheet peeled from the peeling unit, wherein the peeling unit may include: a gripper configured to grasp the adhesive sheet on the electrode sheet; and a rotating part configured to rotate the gripper to wind the adhesive sheet and peel the adhesive sheet from the electrode sheet.

[0011] A method for manufacturing an all-solid-state battery according to another concept of the present invention comprises: transporting a laminated sheet comprising an adhesive sheet and an electrode sheet attached to the adhesive sheet, wherein the electrode sheet comprises a plurality of monocells; separating the adhesive sheet from the electrode sheet; and loading the separated adhesive sheet, wherein separating the adhesive sheet from the electrode sheet may include: fixing the electrode sheet with an adsorption plate; and gripping and winding the adhesive sheet with a gripper, thereby peeling the adhesive sheet from the electrode sheet.

[0012]

[0013] The all-solid-state battery manufacturing apparatus according to the present invention can continuously remove an adhesive sheet by winding and peeling the adhesive sheet, thereby enabling the efficient manufacturing of an all-solid-state battery.

[0014] In addition, the all-solid-state battery manufacturing apparatus according to the present invention can more easily peel off the adhesive sheet from the electrode when peeling off the adhesive sheet by providing an adsorption plate including a vacuum hole.

[0015] The method for manufacturing an all-solid-state battery according to the present invention can efficiently manufacture an all-solid-state battery through a series of continuous processes by using the all-solid-state battery manufacturing apparatus described above.

[0016]

[0017] FIG. 1 is a cross-sectional view of an all-solid-state battery according to one embodiment of the present invention.

[0018] FIG. 2 is a plan view of an all-solid-state battery according to one embodiment of the present invention.

[0019] FIG. 3 is a schematic diagram of an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention.

[0020] FIG. 4 is a conceptual diagram for explaining a laminated sheet among an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention.

[0021] FIG. 5 is a bottom view of a laminated sheet according to one embodiment of the present invention.

[0022] FIG. 6 is a perspective view of an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention.

[0023] FIGS. 7a to 7c are perspective and plan views showing an adsorption plate according to one embodiment of the present invention.

[0024] FIGS. 8 to 14 are conceptual diagrams illustrating the peeling and loading of adhesive sheets of an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention.

[0025] Figure 15 is an enlarged view of the M region of Figure 14.

[0026] FIG. 16 is a conceptual diagram of an all-solid-state battery manufacturing apparatus according to another embodiment of the present invention.

[0027]

[0028] In order to fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can be made. The description of these embodiments is provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention.

[0029] In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, the thicknesses of the components are exaggerated for the effective description of the technical content. Throughout the specification, parts indicated by the same reference numeral represent the same components.

[0030] The embodiments described herein will be described with reference to cross-sectional and / or plan views, which are exemplary illustrations of the invention. In the drawings, the thicknesses of films and regions are exaggerated for effective description of the technical content. Accordingly, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific forms of regions of the device and are not intended to limit the scope of the invention. Although terms such as first, second, third, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments.

[0031] The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components to the mentioned components.

[0032]

[0033] FIG. 1 is a cross-sectional view of an all-solid-state battery according to one embodiment of the present invention. FIG. 2 is a plan view of an all-solid-state battery according to one embodiment of the present invention.

[0034] Referring to FIG. 1, an all-solid-state battery (10) according to one embodiment may include a positive electrode layer (100), a negative electrode layer (200) facing the positive electrode layer (100), and a solid electrolyte layer (300) disposed between the positive electrode layer (100) and the negative electrode layer (200). However, not limited thereto, 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 (100) and the solid electrolyte layer (300) or between the negative electrode layer (200) and the solid electrolyte layer (300).

[0035] In one embodiment, the anode layer (100) may include an anode current collector (110) and an anode active material layer (120) disposed on the anode current collector (110). Although not illustrated, the anode active material layer (120) may include an anode active material, a solid electrolyte, a conductive material, and a binder.

[0036] The positive current collector (110) can provide a reference surface on which the positive active material layer (120) is placed. The positive current collector (110) may include, for example, a plate or foil comprising 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.

[0037] Meanwhile, unlike as illustrated in FIG. 1, the positive current collector (110) may be omitted in one embodiment of the present invention. Although not illustrated, a carbon layer with a thickness of 0.1 μm to 4 μm may be further disposed between the positive current collector (110) and the positive active material layer (120) to increase the bonding strength between the positive current collector (110) and the positive active material layer (120).

[0038] The positive electrode active material may include a material capable of reversibly absorbing and desorbing lithium ions. The positive electrode active material may include a plurality of particles. The positive electrode active material may include, for example, 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, but is not necessarily limited to these. Each positive electrode active material may be a single material or a mixture of two or more materials.

[0039] Lithium transition metal oxides are, 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 cD α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Nor 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 Nor 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 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 G e O2(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 Mn2G b O4(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-fIt is a compound represented by any one of Fe2(PO4)3 (0≤f≤2) or LiFePO4. In such compounds, the uppercase “A” is Ni, Co, Mn, or a combination thereof; the uppercase “B” is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, or a combination thereof; the uppercase “D” is O, F, S, P, or a combination thereof; the uppercase “E” is Co, Mn, or a combination thereof; the uppercase “F” is F, S, P, or a combination thereof; the uppercase “G” is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof; the uppercase “Q” is Ti, Mo, Mn, or a combination thereof; the uppercase “I” is Cr, V, Fe, Sc, Y, or a combination thereof; and the uppercase “J” is V, Cr, Mn, Co, Ni, Cu, or a combination thereof.

[0040] The positive electrode 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 and metal atomic layers are alternately and regularly arranged in a specific direction, thereby forming a two-dimensional plane for each atomic layer. The "cubic rock salt type structure" represents a sodium chloride (NaCl) type structure, which is a type of crystal structure; specifically, it exhibits a structure in which face-centered cubic lattices (fcc) formed by cations and anions, respectively, are offset from each other by half the ridge of the unit lattice. Lithium transition metal oxides having such a layered rock salt type structure are, 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.

[0041] The aforementioned compound contained 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 aforementioned compound and the compound to which the coating layer is added. Meanwhile, the coating layer added to the surface of the positive electrode active material may include, for example, oxides, hydroxides, oxyhydroxides, oxycarbonates, or hydroxycarbonates of the following coating elements. The compounds forming this coating layer are 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. The method for forming the coating layer is, for example, spray coating or immersion.

[0042] When the positive electrode active material contains 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) is increased, and the metal leaching of the positive electrode active material in the charged state can be reduced. As a result, the cycle characteristics of the all-solid-state battery (10) in the charged state are improved. Meanwhile, "cycle characteristics" is a characteristic that indicates the degree of deterioration of the all-solid-state battery (10) due to charging and discharging of the all-solid-state battery (10). An all-solid-state battery (10) with high cycle characteristics has a small degree of deterioration due to charging and discharging, while an all-solid-state battery (10) with low cycle characteristics may have a large degree of deterioration due to charging and discharging.

[0043] The positive active material may have a particle shape such as a sphere or an ellipsoid. The particle size and content of the positive active material are not particularly limited. In one embodiment, the positive active material is in the form of a polycrystalline structure and may include secondary particles formed by the aggregation of at least two primary particles. In other words, a single first particle may include a plurality of primary particles (NNP) aggregated together. The first particle may have a spherical or elliptical shape.

[0044] A solid electrolyte may be dispersed between the cathode active materials. The solid electrolyte dispersed between the cathode active materials may have a particulate form. The solid electrolyte dispersed between the cathode active materials may include a sulfide-based solid electrolyte with excellent lithium ion conductivity characteristics. Sulfide-based solid electrolytes are, for example, Li2S-P2S5, Li2S-P2S5-LiX (where 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, and Li2S-P2S5-Z m S n (m, n are positive numbers, uppercase “Z” is one of Ge, Zn, or Ga), Li2S-GeS2, Li2S-SiS2-Li3PO4, Li2S-SiS2-Li p MO q (p, q are positive numbers, uppercase “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 xIt may include at least one selected from (0≤x≤2).

[0045] Sulfide-based solid electrolytes are, 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 comprising one or more selected from (0≤x≤2). In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound comprising one or more 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. By having a density of 1.5 g / cc or higher for the argyrodite-type solid electrolyte, the internal resistance of the all-solid-state battery is reduced, and defects such as penetration and short circuit of the solid electrolyte film due to lithium dendrite formation can be prevented. The elastic modulus of the solid electrolyte may be, for example, 15 GPa to 35 GPa.

[0046] The solid electrolyte in the positive active material layer (120) may have a smaller average particle size (D50) of intermediate particle size compared to the solid electrolyte in the solid electrolyte layer (300) described later. For example, the average particle size (D50) of the solid electrolyte included in the positive active material layer (120) 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 average particle size (D50) of the solid electrolyte included in the solid electrolyte layer (300). Meanwhile, the average particle size (D50) may be a median diameter measured using a laser particle size distribution meter.

[0047] The positive active material layer (120) may include a conductive material. The conductive material may have conductivity without causing chemical changes in the all-solid-state battery (10), thereby increasing the conductivity of the positive 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.

[0048] The positive active material layer (120) may further include a binder. The binder may bind the positive active material, solid electrolyte, and conductive material within the positive active material layer (120) together. The binder may include a material to improve the bonding strength between the positive active material layer (120) and the positive 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.

[0049] Based on 100 parts by weight of the total positive active material, solid electrolyte, conductive material, and binder, the positive active material layer (120) may contain 85 parts by weight or more and 92 parts by weight or less of the positive active material. Based on 100 parts by weight of the total positive active material, solid electrolyte, conductive material, and binder, the positive active material layer (120) may contain 0.5 parts by weight or more and 1.5 parts by weight or less of the binder.

[0050] Based on 100 parts by weight of solid electrolyte within the positive active material layer (120), the positive active material layer (120) may contain 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 active material layer (120) in an amount less than 1 part by weight based on 100 parts by weight of solid electrolyte within the positive active material layer (120), the proportion of the conductive material decreases, and the electrical conductivity of the positive active material layer (120) may decrease. If the conductive material is included in the positive active material layer (120) in an amount exceeding 50 parts by weight based on 100 parts by weight of solid electrolyte within the positive active material layer (120), the proportion of the conductive material is excessively high, and a coating layer covering the surface of the solid electrolyte may not be properly formed.

[0051] The positive active material layer (120) may further include additives such as fillers, coating agents, dispersants, and ion conductivity aids in addition to the positive active material, solid electrolyte, conductive material, and binder described above.

[0052] 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 placed. The negative electrode current collector (210) may include, for example, a material that does not react with lithium, that is, does not form any alloys or compounds 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.

[0053] The negative current collector (210) may be composed of one of the metals described above, or may include an alloy of two or more metals or a coating material. The negative current collector (210) may, for example, have a plate-like or foil-like shape. Meanwhile, in one embodiment, the negative current collector (210) may be omitted.

[0054] The negative electrode coating layer (220) can allow lithium metal to grow between the all-solid-state battery (10) and the negative electrode current collector (210) during charging. The negative electrode coating layer (220) can serve as a protective layer for the lithium metal and simultaneously suppress the precipitation and growth of lithium dendrites.

[0055] The cathode coating layer (220) may include 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).

[0056] The cathode coating layer (220) may further include other additives in addition to metal and carbon. The cathode coating layer (220) may further include at least one additive selected from the group consisting of, for example, binders, fillers, coating agents, dispersants, and ion-conducting aids.

[0057] The negative electrode coating layer (220) may have a smaller thickness compared to 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 μm to 20 μm, 2 μm to 10 μm, or 3 μm to 7 μm. If the thickness of the negative electrode coating layer (220) is excessively 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 degrading the cycle characteristics of the all-solid-state battery (10). If the thickness of the negative electrode coating layer (220) increases excessively, the energy density of the all-solid-state battery (10) decreases, and the internal resistance of the all-solid-state battery (10) due to the negative electrode coating layer (220) increases, which may degrade the cycle characteristics of the all-solid-state battery (10).

[0058] Meanwhile, although not illustrated, a carbon layer may be further included to improve adhesion between the cathode coating layer (220) and the solid electrolyte layer (300).

[0059] A solid electrolyte layer (300) may be provided between the anode layer (100) and the cathode layer (200). The solid electrolyte layer (300) may include a sulfide-based solid electrolyte with 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 aforementioned anode active material layer (120).

[0060] The solid electrolyte layer (300) may include a first solid electrolyte layer (310) and a second solid electrolyte layer (320). The first solid electrolyte layer (310) may be adjacent to the anode layer (100), and the second solid electrolyte layer (320) may be adjacent to the cathode layer (200).

[0061] The second solid electrolyte layer (320) can be in direct contact with the negative electrode coating layer (220). By doing so, the second solid electrolyte layer (320) can suppress lithium dendrites formed between the negative electrode coating layer (220) and the negative electrode current collector (210). The second solid electrolyte layer (320) can effectively suppress negative side reactions. By doing so, the cell performance of the all-solid-state battery (10) according to the present invention can be improved.

[0062] The solid electrolyte in the solid electrolyte layer (300) may have particle shapes such as spheres or ellipsoids.

[0063] The solid electrolyte in the solid electrolyte layer (300) may include a sulfide-based solid electrolyte. The solid electrolyte in the solid electrolyte layer (300) may be amorphous, crystalline, or a mixture thereof. Additionally, the solid electrolyte may include sulfur (S), phosphorus (P), and lithium (Li) as at least constituent elements among the sulfide-based solid electrolyte materials described above, for example. For example, the solid electrolyte may be a material containing Li2S-P2S5. When using a sulfide-based solid electrolyte material containing Li2S-P2S5 to form the solid electrolyte, the molar ratio of Li2S and P2S5 is, for example, in the range of Li2S : P2S5 = 50 : 50 to 90 : 10.

[0064] In one embodiment, the solid electrolyte in the solid electrolyte layer (300) is Li 7-a M a PS 6-c X c It may be an argyrodite-type compound containing . Here, X may be Cl, Br, or a combination thereof. M may be Na, K, Fe, Mg, Ca, Ag, Cu, Zr, Zn, or a combination thereof. a and c may each be a real number between 0 and 2.

[0065] The density of the azyrodite-type solid electrolyte may be 1.5 g / cc to 2.0 g / cc. By having a density of 1.5 g / cc or higher for the azyrodite-type solid electrolyte, the internal resistance of the all-solid-state battery is reduced, and defects such as penetration and short circuit of the solid electrolyte film due to lithium dendrite formation can be prevented. The elastic modulus of the solid electrolyte in the solid electrolyte layer (300) is, for example, 15 GPa to 35 GPa.

[0066] The solid electrolyte layer (300) may further include a binder. The binder included in the solid electrolyte layer (300) is, for example, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, etc., but is not limited to these. The binder of the solid electrolyte layer (300) 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).

[0067] Referring again to FIG. 1, the first solid electrolyte layer (310) may have a first thickness (t1), and the second solid electrolyte layer (320) may have a second thickness (t2). The solid electrolyte layer (300) may have a third thickness (T). The first thickness (t1) and the second thickness (t2) may have different thicknesses. The second thickness (t2) may be greater than the first thickness (t1).

[0068] The thinner the thickness of the solid electrolyte layer (300), the higher the energy density, but on the other hand, it is difficult to suppress the formation of lithium dendrites in the negative electrode, so there is a possibility of a short circuit.

[0069] In solid electrolytes, voids can form at the interface between the electrode and the electrolyte, which act as interfacial resistance and can lead to battery performance degradation.

[0070] Interfacial resistance can be reduced by applying pressure to the electrode and the solid electrolyte layer together. In one embodiment, since the sulfide-based solid electrolyte has high ionic conductivity and is mechanically soft, an all-solid-state battery with improved interfacial resistance can be fabricated through pressure application.

[0071] In one embodiment of the present invention, the anode layer (120) and the cathode layer (220) may include a pressurization process in the manufacturing process. In one embodiment of the present invention, the pressurization process may be performed by applying different pressures to each of the anode layer (120) and the cathode layer (220). In one embodiment of the present invention, the anode layer (120) may be manufactured by applying a relatively higher pressure compared to the cathode layer (220). For example, applying nanoscale particles to the anode and cathode active materials can increase the contact area with the solid electrolyte and improve interfacial resistance. In one embodiment, the anode active material may be in a polycrystalline form for reasons such as improved adhesion to the electrode plate, capacity characteristics, and lifespan characteristics, and may include secondary particles formed by the aggregation of at least two primary particles. In this case, the interface resistance between the anode layer (120) and the first solid electrolyte layer (310) is observed to be greater than the interface resistance between the cathode layer (220) and the second solid electrolyte layer (320), so the anode laminate can be manufactured by applying a relatively higher pressure compared to the cathode laminate. However, this is not limited thereto, and the anode layer (120) and the cathode layer (220) can be manufactured through a pressurization process in which different pressures are applied to each for various reasons.

[0072] One embodiment of the present invention can solve process problems that may occur when the interfacial resistance between the anode layer (120) and the first solid electrolyte layer (310) is different from the interfacial resistance between the cathode layer (220) and the second solid electrolyte layer (320) by dividing the solid electrolyte (300) into a first solid electrolyte layer (310) and a second solid electrolyte layer (320). For example, an all-solid-state battery manufactured according to the all-solid-state battery manufacturing method described below can provide an all-solid-state battery manufactured by applying different pressures to the anode stack and the cathode stack, respectively.

[0073] One embodiment of the present invention divides the solid electrolyte layer (300) into a first solid electrolyte layer (310) and a second solid electrolyte layer (320) and adjusts the thickness of each differently, thereby increasing energy density while suppressing the formation of lithium dendrites in the negative electrode. This allows for the provision of an all-solid-state battery (10) with improved stability against short-circuit risk and shock and high energy density.

[0074] The ratio (t2 / t1) of the second thickness t2 to the first thickness t1 may be 1 to 20. Specifically, the ratio (t2 / t1) of the second thickness t2 to the first thickness t1 may be 2 to 15, 4 to 11, or 4.5 to 5.5. When the ratio (t2 / t1) of the second thickness t2 to the first thickness t1 is within the aforementioned numerical range, the formation of lithium dendrites in the negative electrode is suppressed while increasing energy density, thereby improving stability against short-circuit risk and shock, and providing an all-solid-state battery (10) with high energy density.

[0075] The first thickness (t1) may be 30 μm or less. Specifically, the first thickness (t1) may be 25 μm or less, 20 μm or less, 14 μm or less, or 10 μm or less. The first thickness (t1) may be 0.1 μm or more. Specifically, the first thickness (t1) may be 1 μm or more, 2 μm or more, 4 μm or more, or 5 μm or more. If the first thickness (t1) exceeds the numerical range mentioned above, the energy density of the all-solid-state battery (10) may decrease. If the first thickness (t1) does not fall within the numerical range mentioned above, the first thickness (t1) may not be sufficient to form an interface with respect to the diameter of the active material powder within the positive electrode.

[0076] The second thickness (t2) may be 30 μm or more. Specifically, it may be 35 μm or more, 40 μm or more, 45 μm or more, 50 μm or more, 55 μm or more, and 60 μm or more. The second thickness (t2) may be 120 μm or less. Specifically, the second thickness (t2) may be 90 μm or less and 60 μm or less. If the second thickness (t2) does not fall within the aforementioned numerical range, it may be difficult to suppress the formation of lithium dendrites within the negative electrode, and there may be a risk of a short circuit. If the second thickness (t2) exceeds the aforementioned numerical range, the energy density of the all-solid-state battery (10) may decrease.

[0077] The third thickness (T) may be 120 μm or less. Specifically, the third thickness (T) may be 90 μm or less and 60 μm or less. The third thickness (T) may be 10 μm or more. Specifically, the third thickness (T) may be 30 μm or more and 50 μm or more. If the third thickness (T) exceeds the above numerical range, the energy density of the all-solid-state battery (10) may decrease.

[0078] Referring to FIGS. 1 and 2, the area of ​​the anode layer (100) and the area of ​​the cathode layer (200) may differ 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 superimposed within the cathode layer (200).

[0079] In one embodiment of the present invention, the first solid electrolyte layer (310) may have substantially the same area as the anode layer (100). The second solid electrolyte layer (320) may have substantially the same area as the cathode layer (200).

[0080] Referring to FIGS. 1 and 2, the first solid electrolyte layer (310) may have a first width (W1) in the first direction (D1). The second solid electrolyte layer (320) may have a second width (W2) in the first direction (D1). The first width (W1) may be smaller than the second width (W2).

[0081] The difference between the second width (W2) and the first width (W1) may be 10 mm or less. Specifically, the difference between the second width (W2) and the first width (W1) may be 8 mm or less, 5 mm or less, or 3 mm or less. The difference between the second width (W2) and the first width (W1) may be 0.1 mm or more, 0.5 mm or more, or 1 mm or more. If the above numerical range is exceeded, the size of the anode layer (100) becomes relatively smaller, so the discharge capacity is lowered and the energy density of the all-solid-state battery (10) may decrease. If the above numerical range is not met, it is difficult to suppress the formation of lithium dendrites in the negative electrode, and there may be a risk of a short circuit.

[0082] The ratio (W2 / W1) of the second width (W2) to the first width (W1) may be 1 to 1.6. Specifically, the ratio (W2 / W1) of the second width (W2) to the first width (W1) may be 1 to 1.5, 1 to 1.4, 1 to 1.3, 1 to 1.2, or 1 to 1.1.

[0083] If the ratio (W2 / W1) of the second width (W2) to the first width (W1) exceeds the numerical range, the energy density of the all-solid-state battery (10) is reduced.

[0084] Referring to FIGS. 1 and 2, the first solid electrolyte layer (310) may have a third width (W3) in the second direction (D2). The second solid electrolyte layer (320) may have a fourth width (W4) in the second direction (D2). The third width (W3) may be smaller than the fourth width (W4).

[0085] The difference between the third width (W3) and the fourth width (W4) may be 10 mm or less. Specifically, the difference between the third width (W3) and the fourth width (W4) may be 8 mm or less, 5 mm or less, or 3 mm or less. The difference between the fourth width (W4) and the third width (W3) may be 0.1 mm or more, 0.5 mm or more, or 1 mm or more. If the above numerical range is exceeded, the size of the anode layer (100) becomes relatively smaller, so the discharge capacity is lowered and the energy density of the all-solid-state battery (10) may decrease. If the above numerical range is not met, it is difficult to suppress the formation of lithium dendrites in the negative electrode, and there may be a risk of a short circuit.

[0086] The ratio (W4 / W3) of the fourth width (W4) to the third width (W3) may be 1 to 1.6. Specifically, the ratio (W4 / W3) of the fourth width (W4) to the third width (W3) may be 1 to 1.5, 1 to 1.4, 1 to 1.3, 1 to 1.2, or 1 to 1.1.

[0087] If the ratio (W4 / W3) of the fourth width (W4) to the third width (W3) exceeds the numerical range, the energy density of the all-solid-state battery (10) is reduced.

[0088]

[0089] FIG. 3 is a schematic diagram of an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention. Referring to FIG. 3, the all-solid-state battery manufacturing apparatus according to one embodiment of the present invention may include a monocell transfer unit (TRU), a stripping unit (POU), and a recovery unit (RCU). The monocell (MNC) may be substantially the same or similar to the all-solid-state battery (10) described in FIG. 1 and FIG. 2.

[0090] A monocell transfer unit (TRU) may be configured to transfer a laminated sheet (STS) in a first direction (D1). Referring to FIGS. 3 and 4, the laminated sheet (STS) may include an electrode sheet (ELS), an adhesive layer (ADL), and an adhesive sheet (ADS). A detailed description of the laminated sheet (STS) will be provided later in FIG. 4. Referring again to FIG. 3, the monocell transfer unit (TRU) may be configured to transfer a plurality of monocells (MNCs) included in the laminated sheet (STS) in a first direction (D1).

[0091] A peeling unit (POU) may be configured to separate an adhesive sheet (ADS) included in a laminated sheet (STS) from an electrode sheet (ELS). The peeling unit (POU) may include a gripper (GRP) configured to grip the adhesive sheet (ADS) on the electrode sheet (ELS), and a rotating part (RTP) configured to rotate the gripper (GRP) to wind the adhesive sheet (ADS) and peel the adhesive sheet (ADS) from the electrode sheet (ELS). Additionally, the peeling unit (POU) may include an adsorption plate (ADP) for loading the laminated sheet (STS). Additionally, the peeling unit (POU) may include a moving part (MVP) that moves the adsorption plate (ADP) in a first direction (D1) while the gripper (GRP) peels the adhesive sheet (ADS).

[0092] The gripper (GRP) can grip the adhesive sheet (ADS). The gripper (GRP) may be any means capable of gripping the adhesive sheet (ADS). Additionally, the gripper (GRP) may be a single one or may refer to a plurality of grippers (GRP). When there is a single gripper (GRP), as shown in FIG. 9, the length of the gripper (GRP) in the second direction (D2) may be equal to or greater than the length of the adhesive sheet (ADS) in the second direction (D2). This may be to allow the single gripper (GRP) to completely grip the adhesive sheet (ADS) attached to the electrode sheet (ELS). When the gripper (GRP) is composed of multiple grippers, as shown in FIG. 16, each of the two sides of the adhesive sheet (ADS) may grip. The two sides of the adhesive sheet (ADS) may refer to the two sides in a direction parallel to the second direction (D2). When the gripper (GRP) comprises multiple grippers (GRP), the length of one of the multiple grippers (GRP) may be smaller than the width of the adhesive sheet (ADS). However, this is not necessarily limited thereto, and the length of one of the multiple grippers (GRP) may be equal to or greater than the width of the adhesive sheet (ADS).

[0093] The rotating part (RTP) may be configured to rotate the gripper (GRP). Additionally, the rotating part (RTP) may be configured to rotate the gripper (GRP) to wind the adhesive sheet (ADS). The rotating part (RTP) may be configured to rotate the gripper (GRP) in a direction opposite to the first direction (D1). As will be described later in FIG. 11, the rotating part (RTP) may be coupled with the gripper (GRP). Additionally, the rotating part (RTP) may move in a direction opposite to the first direction (D1) while rotating the gripper (GRP). Additionally, the rotating part (RTP) may perform only the rotation of the gripper (GRP). That is, when the rotating part (RTP) rotates the gripper (GRP) and the adsorption plate (ADP) moves in the first direction (D1) by the moving part (MVP) at the same time, the rotating part (RTP) may only perform the rotation of the gripper (GRP) and may not move in the opposite direction to the first direction (D1). The rotating part (RTP) may rotate the gripper (GRP) in the opposite direction to the first direction (D1). Additionally, the rotating part (RTP) may rotate the gripper (GRP) counterclockwise with respect to the second direction (D2). The rotating part (RTP) may be any means capable of rotating the gripper (GRP).

[0094]

[0095] The adsorption plate (ADP) can perform the role of loading the laminated sheet (STS). In addition, the adsorption plate (ADP) can perform the role of fixing the electrode sheet (ELS) attached to the adhesive sheet (ADS) when the adhesive sheet (ADS) is peeled off by the gripper (GRP). Details regarding the adsorption sheet will be described in detail later in FIGS. 7a to 7c.

[0096] The moving unit (MVP) can move the adsorption plate (ADP) in a first direction (D1). By moving the adsorption plate (ADP) in the first direction (D1) by the moving unit (MVP), the gripper (GRP) can remove the adhesive sheet (ADS) more quickly. The moving unit (MVP) can be any means capable of moving the adsorption plate (ADP).

[0097]

[0098] The recovery unit (RCU) can be configured to recover the adhesive sheet (ADS) peeled from the peeling unit (POU).

[0099] The recovery unit (RCU) may include a loading section (LDP) configured to load peeled adhesive sheets (ADS). The loading section (LDP) may include a separation groove (SPH) configured to separate the peeled adhesive sheets (ADS) from the gripper (GRP). The loading section (LDP) may perform the function of loading adhesive sheets (ADS) peeled by the peeling unit (POU). The loading section (LDP) may be any means capable of loading the wound and peeled adhesive sheets (ADS). Multiple adhesive sheets (ADS) may be loaded simultaneously in the loading section (LDP).

[0100] The separation groove (SPH) can perform the function of separating the adhesive sheet (ADS) from the gripper (GRP). The separation groove (SPH) will be described in detail in FIGS. 14 and FIGS. 15.

[0101]

[0102] FIG. 4 is a conceptual diagram illustrating a laminated sheet (STS) in an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention. The laminated sheet (STS) may include a plurality of monocells (MNCs). The laminated sheet (STS) may include an electrode sheet (ELS), an adhesive sheet (ADS), and an adhesive layer (ADL) between the electrode sheet (ELS) and the adhesive sheet (ADS).

[0103] The electrode sheet (ELS) may include a plurality of monocells (MNCs) and a gasket sheet (GKS). The plurality of monocells (MNCs) may include two to four monocells (MNCs), but are not necessarily limited thereto. The monocells (MNCs) may be identical or similar to the all-solid-state battery (10) described above in FIGS. 1 and 2. The gasket sheet (GKS) may be in the form of surrounding the edges of the plurality of monocells (MNCs). The electrode sheet (ELS) may include a gasket sheet (GKS) that includes a plurality of openings. That is, the plurality of monocells (MNCs) may each be provided within the plurality of openings. The gasket sheet (GKS) may be intended to compensate for the difference in area between the positive electrode layer and the negative electrode layer, as described above in FIGS. 1 and 2.

[0104] The gasket sheet (GKS) may comprise one or more selected from lithium-ion insulators and lithium-ion conductors. The gasket sheet (GKS) may be an electronic insulator; that is, the gasket sheet (GKS) may not be an electronic conductor. The gasket sheet (GKS) may be an ion insulator; that is, the gasket sheet (GKS) may not be an ion conductor. The gasket sheet (GKS) may comprise, for example, organic materials, inorganic materials, or organic-inorganic composite materials. Organic materials may be, for example, polymers. Inorganic materials may be ceramics, for example, metal oxides. Organic-inorganic composite materials may be a composite of a polymer and a metal oxide.

[0105] The adhesive layer (ADL) can serve to attach the laminated sheet (STS) to the adhesive sheet (ADS). The adhesive layer (ADL) can be located between the adhesive sheet (ADS) and the laminated sheet (STS). The adhesive layer (ADL) may include at least one selected from the group consisting of acrylic adhesives, silicone adhesives, and rubber adhesives.

[0106] The adhesive layer (ADL) may be located on the upper surface of the laminated sheet (STS). Additionally, the adhesive layer (ADL) may be located in the third direction (D3) of the laminated sheet (STS). The adhesive layer (ADL) may be completely bonded to the laminated sheet (STS).

[0107] For example, the adhesive layer (ADL) may have adhesive properties. For instance, the adhesive layer (ADL) may have adhesive properties sufficient to allow the adhesive sheet (ADS) to be subsequently detached or peeled off. The adhesive layer (ADL) may serve to attach the laminated sheet (STS) to the adhesive sheet (ADS). The adhesive layer (ADL) may be located between the adhesive sheet (ADS) and the laminated sheet (STS). The adhesive layer (ADL) may include at least one selected from the group consisting of acrylic adhesives, silicone adhesives, and rubber adhesives.

[0108] The adhesive sheet (ADS) can perform the function of adhering the laminated sheet (STS) to transport multiple monocells (MNCs). Additionally, the adhesive sheet (ADS) can perform the function of protecting the surfaces of multiple monocells (MNCs) from a pressurizing device during the process of pressurizing the multiple monocells (MNCs). The adhesive sheet (ADS) may include polyethylene terephthalate, etc. However, the components of the adhesive sheet (ADS) are not limited as long as they can perform the aforementioned functions.

[0109] The adhesive sheet (ADS) can be located on the adhesive layer (ADL). That is, the adhesive sheet (ADS) can be located in the third direction (D3) of the adhesive layer (ADL). Additionally, the adhesive sheet (ADS) can be located in the third direction (D3) of the laminated sheet (STS).

[0110]

[0111] FIG. 5 is a bottom view of a laminated sheet (STS) according to an embodiment of the present invention. To explain the differences compared with FIG. 4, the area of ​​the adhesive sheet (ADS) included in the laminated sheet (STS) may be the largest. Additionally, the area of ​​the adhesive layer (ADL) may be larger than the area of ​​the electrode sheet (ELS). Furthermore, the area of ​​the adhesive layer (ADL) may be larger than the area of ​​multiple monocells (MNCs) or gasket sheets (GKS). This is because the adhesive layer (ADL) attaches the adhesive sheet (ADS) and the electrode sheet (ELS), and if the area of ​​the adhesive layer (ADL) is smaller than the area of ​​the electrode sheet (ELS), a part of the electrode sheet (ELS) may not be attached to the adhesive sheet (ADS).

[0112]

[0113] FIG. 6 is a perspective view of an all-solid-state battery manufacturing apparatus according to one embodiment of the present invention.

[0114] FIG. 6 is a diagram showing an electrode sheet (ELS) attached to an adhesive sheet (ADS). Referring to FIG. 6, the electrode sheet (ELS) can be attached to the adhesive sheet (ADS) and transported in a first direction (D1). Additionally, a plurality of monocells (MNCs) can be attached to the adhesive sheet (ADS) and transported in a first direction (D1). Although not shown in FIG. 6, a separate pressurizing process may be performed on the laminated sheet (STS) before it is transported to a peeling unit (POU). The pressurizing process may be a process for pressurizing the plurality of monocells (MNCs) located on the electrode sheet (ELS). Additionally, the pressurizing process may be a process for line pressing the plurality of monocells (MNCs). The pressurizing process may be a process for pressurizing all of the plurality of monocells (MNCs), the adhesive layer (ADL) located on the plurality of monocells (MNCs), and the adhesive sheet (ADS).

[0115] Referring again to FIG. 6, the electrode sheet (ELS) can be attached to the lower surface of the adhesive sheet (ADS) and transported in the first direction (D1). The lower surface of the adhesive sheet (ADS) may refer to a surface located opposite to the third direction (D3). Additionally, a plurality of monocells (MNCs) can be attached to the lower surface of the adhesive sheet (ADS) and transported in the first direction (D1). The width of the electrode sheet (ELS) may be the same as the width (MWI) of the monocell. The width (MWI) of the monocell may be the same as the fourth width (W4) shown in FIG. 2.

[0116]

[0117] FIGS. 7a to 7c are perspective and plan views showing an adsorption plate (ADP) according to one embodiment of the present invention. FIG. 7a is a perspective view of an adsorption plate (ADP) according to one embodiment of the present invention. FIG. 7b is a perspective view of an adsorption plate (ADP) according to another embodiment of the present invention. FIG. 7c is a front view of an adsorption plate (ADP) according to one embodiment of the present invention.

[0118] The adsorption plate (ADP) may be configured to secure the electrode sheet (ELS) while the gripper (GRP) peels off the adhesive sheet (ADS). Referring to FIG. 7a, the adsorption plate (ADP) may include a plurality of vacuum holes (VCH). Additionally, the adsorption plate (ADP) may include a gripper entry portion (GIP) that provides a space for the gripper (GRP) to grip the adhesive sheet (ADS).

[0119] Multiple vacuum holes (VCH) can serve to fix the electrode sheet (ELS). Multiple vacuum holes (VCH) may be connected to a means for sucking air. In FIG. 7a, a means for sucking air may be separately present on the lower surface of the multiple vacuum holes (VCH). That is, the electrode sheet (ELS) may be located in the third direction (D3) of the adsorption plate (ADP), and the air sucking means may be located in the direction opposite to the third direction (D3) of the adsorption plate (ADP).

[0120] Referring to FIGS. 7a and 7c, the width (VCW) of the region where the plurality of vacuum holes are located may be the same as the width (MWI) of the electrode sheet (ELS). Additionally, the width (VCW) of the region where the plurality of vacuum holes are located may be smaller than the width (MWI) of the electrode sheet (ELS).

[0121] Multiple vacuum holes (VCH) may be provided within a region (AR1, FIG. 7c) of the adsorption plate (ADP). The region (AR1, FIG. 7c) of the adsorption plate (ADP) may be an area where the adsorption plate (ADP) and the electrode sheet (ELS) overlap. That is, the multiple vacuum holes (VCH) may be located only in the area where the adsorption plate (ADP) and the electrode sheet (ELS) are in contact. This is because if the multiple vacuum holes (VCH) are also located in an area that is not in contact with the electrode sheet (ELS), the peeling of the adhesive sheet (ADS) may not be easy due to unnecessary adsorption between the adsorption plate (ADP) and the adhesive sheet (ADS).

[0122] The vacuum hole (VCH) may be in a circular shape as shown in FIGS. 7a to 7c, but is not necessarily limited thereto and can be in any shape that can suck in air.

[0123] The gripper entry portion (GIP) may be an area where the gripper (GRP) grips the adhesive sheet (ADS). The gripper entry portion (GIP) may provide a space that allows the gripper (GRP) to grip the adhesive sheet (ADS). The gripper entry portion (GIP) may be a means provided to facilitate the gripper (GRP) gripping the adhesive sheet (ADS) located on the adsorption plate (ADP). Referring to FIG. 7a, the gripper entry portion (GIP) may be located in the first direction (D1) of the adsorption plate (ADP). This may be an area where the gripper (GRP) begins to peel off the adhesive sheet (ADS). The gripper entry portion (GIP) is an area where the gripper (GRP) grips the adhesive sheet (ADS) and is not necessarily limited to the area shown in FIG. 7a and FIG. 7b, but may be located in any area of ​​the adsorption plate (ADP).

[0124] The gripper entry portion (GIP) may be formed wider than the width of the gripper (GRP). This may be to facilitate the gripping of the adhesive sheet (ADS) when the gripper (GRP) grips it at the gripper entry portion (GIP). The gripper (GRP) entry portion may be in a shape where a portion of the adsorption plate (ADP) is recessed, as shown in FIG. 7a. Additionally, the gripper entry portion (GIP) may be in a shape where a portion of the adsorption plate (ADP) is removed, as shown in FIG. 7b. Furthermore, the shape of the gripper entry portion (GIP) is not limited to the shapes shown in FIG. 7a and FIG. 7b, and any shape is possible as long as it allows the gripper (GRP) to grip the adhesive sheet (ADS) by minimizing contact with the adsorption plate (ADP).

[0125] Referring again to FIG. 7b, the width of the gripper entry (GIW) may be smaller than the width of the adsorption plate (ADW). This may be to minimize contact between the gripper (GRP) and the adsorption plate (ADP) in the area where the width of the gripper entry (GIW) is smaller than the width of the adsorption plate (ADW).

[0126]

[0127] FIGS. 8 to 14 are conceptual diagrams illustrating the peeling and stacking of an adhesive sheet (ADS) in an all-solid-state battery manufacturing apparatus according to an embodiment of the present invention. FIGS. 8 to 14 are drawings sequentially illustrating an all-solid-state battery manufacturing method according to an embodiment of the present invention.

[0128] Referring to FIGS. 8 to 14, a method for manufacturing an all-solid-state battery according to one embodiment of the present invention may include transporting a laminated sheet comprising an adhesive sheet and an electrode sheet attached to the adhesive sheet (S100), separating the adhesive sheet from the electrode sheet (S200), and loading the separated adhesive sheet (S300). Additionally, separating the adhesive sheet from the electrode sheet (S200) may include fixing the electrode sheet with an adsorption plate (S210), and gripping the adhesive sheet with a gripper and winding it, thereby peeling the adhesive sheet from the electrode sheet (S220). Additionally, loading the adhesive sheet (S300) may include placing the adhesive sheet wound by the gripper into a separation groove (S310) and detaching it from the adhesive sheet (ADS) with a gripper (S320).

[0129] Hereinafter, I will explain sequentially with reference to the drawings in FIGS. 8 to 14.

[0130] FIG. 8 is a diagram showing the stacked order of an adsorption plate (ADP) and a laminated sheet (STS). Referring to FIG. 8, a laminated sheet (STS) located on an adsorption plate (ADP) can be moved in a first direction (D1). Additionally, the laminated sheet (STS) can be moved in the first direction (D1) by a monocell transfer unit (TRU). Additionally, the laminated sheet (STS) can be moved in the first direction (D1) by an adsorption plate (ADP) and a moving unit (MVP). The laminated sheet (STS) in FIG. 8 may be depicted with the adhesive layer (ADL) omitted. Referring to FIG. 8, a laminated sheet (STS) including an adhesive sheet (ADS) and an electrode sheet (ELS) attached to the adhesive sheet (ADS) can be transferred by an adsorption plate (ADP) or a monocell transfer unit (TRU) (S100).

[0131] FIGS. 9 to 12 are drawings illustrating a peeling unit according to an embodiment of the present invention peeling an adhesive sheet (S200). To explain in order, as shown in FIG. 9, a gripper (GRP) can grip the adhesive sheet (ADS) at the gripper entry part (GIP). Although only one gripper (GRP) is shown in FIG. 9, as shown in FIG. 16 which will be described later, a plurality of grippers (GRP1, GRP2, FIG. 16) may simultaneously grip the adhesive sheet (ADS).

[0132] Referring to FIG. 10, the gripper (GRP) that enters from the gripper entry section (GIP) can begin peeling after gripping the adhesive sheet (ADS). To begin peeling the adhesive sheet (ADS), the gripper (GRP) can move the adhesive sheet (ADS) away from the third direction (D3) by a certain distance. This may be to secure a minimum space for the gripper (GRP) to wind the adhesive sheet (ADS). At this time, the electrode sheet (ELS) may be fixed by the adsorption plate (ADP) (S210). The fixing of the electrode sheet (ELS) by the adsorption plate (ADP) may be as described above in FIG. 7a and FIG. 7c.

[0133] Referring to FIG. 11, the gripper can wind the adhesive sheet in a direction opposite to the first direction after gripping the adhesive sheet (S220). Additionally, the gripper (GRP) can wind the adhesive sheet (ADS) in a direction opposite to the first direction (D1) by the rotating part (RTP) after gripping the adhesive sheet (ADS). As shown in FIG. 11, the part wound by the gripper (GRP) and the rotating part (RTP) may be the adhesive sheet (ADS) or the adhesive sheet (ADS) and the adhesive layer (ADL). Therefore, the electrode sheet (ELS) may not be wound by the gripper (GRP) and the rotating part (RTP). Referring again to FIG. 11, while the adhesive sheet (ADS) is peeled by the gripper (GRP) and the rotating part (RTP), the adsorption plate (ADP) may be moved in the first direction (D1) by the moving part (MVP). That is, the winding direction of the adhesive sheet (ADS) may be opposite to the movement direction of the adsorption plate (ADP). The winding direction of the adhesive sheet (ADS) may be opposite to the first direction (D1).

[0134] Referring to FIG. 12, FIG. 12 shows an adhesive sheet (ADS) and a gripper (GRP) that have been rolled up after winding and peeling are completed. As shown in FIG. 12, when the adhesive sheet (ADS) is peeled from the electrode sheet (ELS) by a peeling unit (POU), it may be in a rolled-up, cylindrical shape. As shown in FIG. 12, after the adhesive sheet (ADS) is peeled by the peeling unit (POU), the gripper (GRP) holds the rolled adhesive sheet (ADS), and the adhesive sheet (ADS) may be removed from the electrode sheet (ELS).

[0135] FIG. 13 is a drawing showing the loading of an adhesive sheet (ADS) peeled from a peeling unit (POU) (S300). Referring to FIG. 13, the peeled adhesive sheet (ADS) can be loaded into a loading section (LDP) by a gripper (GRP) (S310).

[0136] FIGS. 14 and 15 illustrate a gripper (GRP) loading a peeled adhesive sheet (ADS) onto a loading section (LDP). FIG. 15 is an enlarged view of the M area of ​​FIG. 14. Referring to FIGS. 14 and 15, the adhesive sheet (ADS) rolled up on the gripper (GRP) can be mounted in a separation groove (SPH) and detached from the gripper (GRP) (S320). In order for the gripper (GRP) and the adhesive sheet (ADS) to be separated in the separation groove (SPH), the diameter (RD) of the rolled adhesive sheet may be larger than the width of the separation groove (SPH), as shown in FIG. 15. Therefore, an adhesive sheet (ADS) larger than the width of the separation groove (SPH) can be mounted in the separation groove (SPH) and easily detached from the gripper (GRP). Additionally, the separation groove (SPH) may be larger than the width of the gripper (GRP).

[0137] FIG. 16 is a conceptual diagram of an all-solid-state battery manufacturing apparatus according to another embodiment of the present invention. The plurality of grippers (GRP1, GRP2) in FIG. 16 may be the same as or identical to those described above in FIG. 3, FIG. 7b and FIG. 9.

[0138]

[0139] Although embodiments of the present invention have been described above with reference to the attached drawings, the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. A monocell transfer unit configured to transfer a laminated sheet in a first direction, wherein the laminated sheet comprises an electrode sheet including a plurality of monocells, an adhesive sheet, and an adhesive layer between the electrode sheet and the adhesive sheet; A peeling unit configured to separate the adhesive sheet from the electrode sheet; and It includes a recovery unit configured to recover the adhesive sheet peeled from the peeling unit, wherein The above peeling unit is: A gripper configured to grip the adhesive sheet on the electrode sheet; and A solid-state battery manufacturing apparatus comprising a rotating part configured to rotate the gripper to wind the adhesive sheet and to peel the adhesive sheet from the electrode sheet.

2. In Paragraph 1, The above peeling unit further includes an adsorption plate for loading the laminated sheet, and The above-described adsorption plate is configured to fix the electrode sheet while the gripper peels off the adhesive sheet, in an all-solid-state battery manufacturing device.

3. In Paragraph 2, The above adsorption plate is: A plurality of vacuum holes that adsorb the electrode sheet; and A solid-state battery manufacturing apparatus comprising a gripper entry portion that provides a space for the gripper to grip the adhesive sheet.

4. In Paragraph 3, The plurality of vacuum holes are provided within one region of the adsorption plate, and A solid-state battery manufacturing apparatus in which one region of the adsorption plate overlaps with the electrode sheet.

5. In Paragraph 4, A solid-state battery manufacturing device in which the width of the second direction of the gripper entry part is smaller than the width of the second direction of the adsorption plate.

6. In Paragraph 2, The above peeling unit further comprises a moving part that moves the adsorption plate in the first direction while the gripper peels the adhesive sheet, an all-solid-state battery manufacturing apparatus.

7. In Paragraph 1, The above recovery unit includes a loading section configured to load the peeled adhesive sheet, and A solid-state battery manufacturing apparatus comprising a loading portion including a separation groove configured to separate the peeled adhesive sheet from the gripper.

8. In Paragraph 7, A solid-state battery manufacturing device in which the width of the separation groove is smaller than the diameter of the adhesive sheet wound by the gripper.

9. In Paragraph 1, A solid-state battery manufacturing apparatus in which the gripper of the above peeling unit comprises a plurality of grippers.

10. In Paragraph 1, The above electrode sheet further includes a gasket sheet having a plurality of openings, and A solid-state battery manufacturing apparatus in which the plurality of monocells are each provided within the plurality of openings.

11. In Paragraph 1, A solid-state battery manufacturing apparatus comprising at least one selected from the group consisting of an adhesive layer, an acrylic adhesive, a silicone adhesive, and a rubber adhesive.

12. In Paragraph 1, The above adhesive layer overlaps the above electrode sheet, and A solid-state battery manufacturing apparatus in which the area of ​​the adhesive layer is equal to or greater than the area of ​​the electrode sheet.

13. Transporting a laminated sheet comprising an adhesive sheet and an electrode sheet attached to the adhesive sheet, wherein the electrode sheet comprises a plurality of monocells; Separating the adhesive sheet from the electrode sheet; and Loading the separated adhesive sheets, Separating the above adhesive sheet from the above electrode sheet is: Fixing the electrode sheet with an adsorption plate; and A method for manufacturing an all-solid-state battery, comprising gripping and winding the adhesive sheet with a gripper, and thereby peeling the adhesive sheet from the electrode sheet.

14. In Paragraph 13, The above-mentioned adsorption plate includes a plurality of vacuum holes, and A method for manufacturing an all-solid-state battery, wherein fixing the monocell with the adsorption plate includes adsorbing the electrode sheet with the plurality of vacuum holes.

15. In Paragraph 13, A method for manufacturing an all-solid-state battery, wherein gripping the adhesive sheet with the gripper comprises allowing the gripper to grip the adhesive sheet through the gripper entry portion of the adsorption plate.

16. In Paragraph 13, The above gripper includes a pair of grippers, A method for manufacturing an all-solid-state battery, wherein gripping the adhesive sheet with the gripper comprises gripping each of the two sides of the adhesive sheet with the pair of grippers.

17. In Paragraph 13, A method for manufacturing an all-solid-state battery, wherein separating the adhesive sheet from the electrode sheet further comprises moving the adsorption plate while the gripper peels off the adhesive sheet.

18. In Paragraph 17, A method for manufacturing an all-solid-state battery, wherein the winding direction of the adhesive sheet is opposite to the movement direction of the adsorption plate.

19. In Paragraph 13, Loading the adhesive sheet above involves: placing the adhesive sheet wound by the gripper into the separation groove; and A method for manufacturing an all-solid-state battery, further comprising detaching the above-mentioned gripper from the above-mentioned adhesive sheet.

20. In Paragraph 19, The above gripper includes a pair of grippers, Mounting the adhesive sheet wound by the gripper above into the separation groove is, A method for manufacturing an all-solid-state battery, comprising mounting the adhesive sheet in a separation groove by at least one of the above pair of grippers.

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