Stacking apparatus and method for manufacturing all-solid-state battery using same

Abstract

The present invention relates to a stacking device and a method for manufacturing an all-solid-state battery using the same. More specifically, the stacking device comprises a magazine unit, a sheet transfer unit, a sheet alignment unit, and a sheet supply unit. The magazine unit is configured to supply electrode sheets, the sheet transfer unit is configured to pick up the electrode sheets and transport to the sheet alignment unit, the sheet alignment units is configured to determine whether the electrode sheets are aligned, and the sheet supply unit is configured to stack the electrode sheets on an electrode web, the sheet supply unit comprising a stage on which the electrode sheets are loaded and a feeding roller provided on one side of the stage, and the feeding roller being configured so that the electrode sheets are detached from the stage and attached onto the electrode web.

Description

Laminating device and method for manufacturing an all-solid-state battery using the same

[0001] The present invention relates to a laminating device and a method for manufacturing an all-solid-state battery using the same, and more particularly, to a laminating device and a laminating method capable of continuously attaching electrode sheets onto an electrode web.

[0002]

[0003] Recent industrial demands have led to the active development of batteries with high energy density and safety. For example, lithium-ion batteries are being used not only in information and communication devices, but also in the automotive sector. Safety is particularly important in the automotive sector, as it is directly related to life.

[0004] Meanwhile, lithium-ion batteries currently on the market contain electrolytes containing flammable organic dispersions, which pose a risk of overheating and fire in the event of a short circuit. Considering these issues, all-solid-state batteries, which replace the electrolyte with a solid electrolyte, are being proposed. By eliminating flammable organic dispersions, all-solid-state batteries significantly reduce the risk of fire or explosion in the event of a short circuit. Therefore, these all-solid-state batteries can significantly improve safety compared to lithium-ion batteries that use electrolytes.

[0005]

[0006] The problem to be solved by the present invention is to provide a device for laminating electrode sheets that can be applied to a web process.

[0007] Another problem to be solved by the present invention is to provide a method for manufacturing an all-solid-state battery using the above-described stacking device.

[0008]

[0009] According to one embodiment of the present invention, a stacking device may include a magazine unit, a sheet transport unit, a sheet alignment unit, and a sheet supply unit. The magazine unit is configured to supply electrode sheets, the sheet transport unit is configured to pick the electrode sheets and transport them to the sheet alignment unit, the sheet alignment unit is configured to determine whether the electrode sheets are aligned, the sheet supply unit is configured to stack the electrode sheets on an electrode web, and the sheet supply unit includes a stage on which the electrode sheets are loaded and a feeding roller provided on one side of the stage, and the feeding roller may be configured to detach the electrode sheets from the stage and attach them onto the electrode web.

[0010] According to another embodiment of the present invention, a method for manufacturing an all-solid-state battery may include: causing an electrode web to travel in a first direction; supplying an electrode sheet onto a stage; inverting the stage so that the electrode sheet faces the electrode web; and attaching the electrode sheet onto the electrode web. The electrode sheet may be detached from the stage and attached onto the electrode web through a feeding roller provided on one side of the stage.

[0011]

[0012] The laminating device according to the present invention can effectively supply and attach electrode sheets onto an electrode web. This improves the alignment between the electrode sheets and the electrode web. The method for manufacturing an all-solid-state battery according to the present invention can laminate and roll-press electrodes through a web process. Consequently, the productivity of all-solid-state batteries can be improved.

[0013]

[0014] FIG. 1 is a cross-sectional view illustrating an all-solid-state battery according to embodiments of the present invention.

[0015] FIG. 2 is a perspective view illustrating a stacking device of an all-solid-state battery according to embodiments of the present invention.

[0016] FIGS. 3 to 7 are perspective views illustrating a method for manufacturing an all-solid-state battery according to embodiments of the present invention.

[0017]

[0018] 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.

[0019] 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. Also, in the drawings, the thickness of the components is exaggerated for the purpose of effectively explaining the technical contents. Parts designated by the same reference numbers throughout the specification represent the same components.

[0020] The embodiments described herein will be described with reference to cross-sectional views, plan views, and / or perspective views, which are ideal illustrations of the present invention. Although terms such as "first," "second," and "third" are used to describe various components in various embodiments of this specification, these components should not be limited by these terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments.

[0021] 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.

[0022]

[0023] FIG. 1 is a cross-sectional view illustrating an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 1, the all-solid-state battery (10) may include a positive electrode layer (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, the present invention is not limited thereto, and the all-solid-state battery (10) may further include an additional functional layer, such as an adhesion enhancing layer, disposed between the positive electrode layer (100) and the solid electrolyte layer (300) or between the negative electrode layer (200) and the solid electrolyte layer (300).

[0024] The positive electrode layer (100) 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.

[0025] 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 have a plate or foil shape. For example, the positive electrode current collector (110) can include indium (In), copper (Cu), magnesium (Mg), stainless steel, titanium (Ti), iron (Fe), cobalt (Co), nickel (Ni), zinc (Zn), aluminum (Al), germanium (Ge), lithium (Li), or an alloy thereof.

[0026] 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).

[0027] The cathode active material may be a material that can reversibly absorb and desorb lithium ions. For example, the cathode active material may include, but is not limited to, lithium transition metal oxides such as lithium cobalt oxide (LCO), lithium nickel oxide, lithium nickel cobalt oxide, lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium manganate, and lithium iron phosphate, nickel sulfide, copper sulfide, lithium sulfide, iron oxide, or vanadium oxide. The cathode active materials may be used alone or as a mixture of two or more thereof.

[0028] 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), Lia 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 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-fIt may be a compound represented by any one of Fe2(PO4)3(0≤f≤2), LiFePO4. In these compounds, the capital letter “A” is Ni, Co, Mn, or a combination thereof, the capital letter “B” is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, or a combination thereof, the capital letter “D” is O, F, S, P, or a combination thereof, the capital letter “E” is Co, Mn, or a combination thereof, the capital letter “F” is F, S, P, or a combination thereof, the capital letter “G” is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof, the capital letter “Q” is Ti, Mo, Mn, or a combination thereof, the capital letter “I” is Cr, V, Fe, Sc, Y, or a combination thereof, and the capital letter “J” is V, Cr, Mn, Co, Ni, Cu, or a combination thereof.

[0029] The cathode active material may include, for example, a lithium salt of a transition metal oxide having a layered rock salt type structure among the lithium transition metal oxides described above. The "layered rock salt type structure" is, for example, a cubic rock salt type structure. <111> It is a structure in which oxygen atomic layers and metal atomic layers are alternately and regularly arranged in a direction, and thereby each atomic layer forms a two-dimensional plane. The "cubic rock salt structure" refers to the sodium chloride type (NaCl type) structure, which is a type of crystal structure, and specifically refers to a structure in which the face-centered cubic lattice (fcc) formed by each cation and anion is arranged with a displacement of half of the ridge of the unit lattice. Lithium transition metal oxides having this layered rock salt structure include, for example, LiNi x Co y Al z O2(NCA) or LiNi x Co y Mnz O2(NCM) (0 <x<1,0<y<1, 0<z<1, x+y+z=1) 등의 삼원계 리튬전이금속산화물일 수 있다. 양극 활물질이 층상암염형 구조를 갖는 삼원계 리튬전이금속산화물을 포함하는 경우, 전고체 전지(10)의 에너지 밀도가 커지고 열안정성이 향상될 수 있다.

[0030] The above-described compound included in the positive electrode active material may be covered by a coating layer (not shown). The positive electrode active material may also be a mixture of the above-described compound and a compound to which a coating layer is added. Meanwhile, the coating layer added to the surface of the positive electrode active material may include, for example, an oxide, a hydroxide, an oxyhydroxide, an oxycarbonate, or a hydroxycarbonate of the coating elements below. The compound forming the coating layer may be amorphous or crystalline. The coating elements included in the coating layer may include Mg, Al, Co, K, Na, Ca, Si, Ti, V, Sn, Ge, Ga, B, As, Zr, or mixtures thereof. The coating layer may include, for example, Li2O-ZrO2 (LZO). The method for forming the coating layer may be selected within a range that does not adversely affect the physical properties of the positive electrode active material. The method for forming the coating layer may include, for example, a spray coating method or an immersion method.

[0031] 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, and metal dissolution of the positive electrode active material in a charged state can be reduced. As a result, the cycle characteristics of the all-solid-state battery (10) in a charged state can be improved. Meanwhile, the “cycle characteristics” are characteristics indicating the degree to which the all-solid-state battery (10) is deteriorated due to charge / discharge of the all-solid-state battery (10). An all-solid-state battery (10) with high cycle characteristics can have a small degree of deterioration of the all-solid-state battery (10) due to charge / discharge, and an all-solid-state battery (10) with low cycle characteristics can have a large degree of deterioration of the all-solid-state battery (10) due to charge / discharge.

[0032] The shape of the positive electrode active material may include particle shapes such as a sphere or an ellipsoid, for example. The particle size and content of the positive electrode active material are not particularly limited.

[0033] 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).

[0034] Sulfide-based solid electrolytes include, for example, Li 7-x PS 6-x Cl x (0≤x≤2), Li 7-x PS 6-x Br x (0≤x≤2), and Li 7-x PS 6-x I x (0≤x≤2) may be an argyrodite-type compound including at least one selected from. In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound including at least one selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I. The density of the argyrodite-type solid electrolyte may be 1.5 g / cc to 2.0 g / cc. Since the argyrodite-type solid electrolyte has a density of 1.5 g / cc or more, the internal resistance of the all-solid-state battery is reduced, and the defect of the solid electrolyte membrane being penetrated and short-circuited due to the formation of lithium dendrites can be prevented. The elastic modulus of the solid electrolyte may be, for example, 15 GPa to 35 GPa.

[0035] The solid electrolyte included in the positive electrode active material layer (120) may have a smaller median particle size (D50) than the solid electrolyte included in the solid electrolyte layer (300). For example, the median particle size (D50) of the solid electrolyte included in the positive electrode 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 median particle size (D50) of the solid electrolyte included in the solid electrolyte layer (300). Meanwhile, the median particle size (D50) may be a median diameter measured using a laser particle size distribution meter.

[0036] 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.

[0037] The positive electrode active material layer (120) may further include a binder. The binder may include a material for binding the positive electrode active material, solid electrolyte, and conductive material included in the positive electrode active material layer (120) and improving bonding strength with the positive electrode current collector (110). For example, the binder may include polyvinylidene fluoride, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, vinylidene fluoride / hexafluoropropylene copolymer, polyacrylonitrile, or polymethyl methacrylate.

[0038] When the total amount of the positive electrode active material, the solid electrolyte, the conductive material, and the binder is 100 parts by weight, the positive electrode active material layer (120) may include 85 parts by weight to 92 parts by weight of the positive electrode active material. The positive electrode active material layer (120) may include 0.5 parts by weight to 1.5 parts by weight of the binder.

[0039] Within the positive electrode active material layer (120), the conductive material may be present in an amount of 1 to 50 parts by weight relative to 100 parts by weight of the solid electrolyte. If the conductive material is present in an amount less than 1 part by weight relative to 100 parts by weight of the solid electrolyte, the electrical conductivity of the positive electrode active material layer (120) may be reduced. If the conductive material is present in an amount greater than 50 parts by weight relative to 100 parts by weight of the solid electrolyte, the conductive material ratio may be excessively high, and thus a covering layer covering the surface of the solid electrolyte may not be properly formed.

[0040] According to embodiments, the positive electrode active material layer (120) may further include at least one additive selected from the group consisting of a filler, a coating agent, a dispersant, and an ion conductive auxiliary agent in addition to the above-described positive electrode active material, solid electrolyte, conductive agent, and binder.

[0041] The solid electrolyte layer (300) is disposed between the positive electrode layer (100) and the negative electrode layer (200) and may include a sulfide-based solid electrolyte having excellent lithium ion conductivity characteristics. The solid electrolyte included in the solid electrolyte layer (300) may be the same as or different from any one of the materials that may be included in the solid electrolyte included in the positive electrode active material layer (120) described above.

[0042] The solid electrolyte layer (300) of one embodiment may include a sulfide-based solid electrolyte. The sulfide-based solid electrolyte may be manufactured by treating starting materials such as Li2S and P2S5 by a melting rapid cooling method or a mechanical milling method. In addition, a heat treatment may be performed after the treatment. The solid electrolyte may be amorphous, crystalline, or a mixture thereof. In addition, the solid electrolyte may include, for example, at least sulfur (S), phosphorus (P), and lithium (Li) as constituent elements among the above-described sulfide-based solid electrolyte materials. For example, the solid electrolyte may be a material including Li2S-P2S5. When using a sulfide-based solid electrolyte material including Li2S-P2S5 to form the solid electrolyte, the mixing molar ratio of Li2S and P2S5 is, for example, in the range of Li2S:P2S5=50:50 to 90:10.

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

[0044] The solid electrolyte layer (300) may further include a binder. The binder in the solid electrolyte layer (300) may be, for example, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, etc., but is not limited thereto. The binder of the solid electrolyte layer (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).

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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).

[0049] 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.

[0050] 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 all-solid-state battery (10).

[0051] 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).

[0052]

[0053] FIG. 2 is a perspective view illustrating a stacking device of an all-solid-state battery according to embodiments of the present invention.

[0054] Referring to FIG. 2, the stacking device may include a magazine unit (MAG), a sheet transport unit (STU), a sheet alignment unit (ALU), and a sheet supply unit (TRU). A plurality of electrode sheets (EST) may be loaded into the magazine unit (MAG). The magazine unit (MAG) may be configured to sequentially supply the plurality of electrode sheets (EST).

[0055] Each of the electrode sheets (EST) loaded into the magazine unit (MAG) may be the positive electrode layer (100) or the negative electrode layer (200) described above with reference to FIG. 1. In one embodiment of the present invention, the electrode sheet (EST) may include the positive electrode layer (100) or the negative electrode layer (200) and a solid electrolyte layer (300 in FIG. 1) formed thereon. In another embodiment of the present invention, the solid electrolyte layer may be omitted from the electrode sheet (EST).

[0056] The sheet transport unit (STU) may include a sheet picking unit (CPK) and a transfer unit (TFU). The sheet picking unit (CPK) may be configured to pick up electrode sheets (EST) supplied from a magazine unit (MAG). For example, the sheet picking unit (CPK) may include a suction means capable of suctioning the electrode sheets (EST).

[0057] The transfer unit (TFU) may be configured to transfer the picked electrode sheet (EST) to the sheet alignment unit (ALU). For example, the transfer unit (TFU) may take the form of a robotic arm and transfer the electrode sheet (EST) from the magazine unit (MAG) to the sheet alignment unit (ALU).

[0058] The sheet alignment unit (ALU) may include first to fourth alignment stages (ALS1 to ALS4) and a first rotation unit (LOR1). The first rotation unit (LOR1) may have a roller shape or a drum shape that rotates counterclockwise. The first to fourth alignment stages (ALS1 to ALS4) may be arranged at regular intervals along an outer surface of the first rotation unit (LOR1). The first rotation unit (LOR1) may be configured to move the first to fourth alignment stages (ALS1 to ALS4) counterclockwise.

[0059] Each of the first to fourth alignment stages (ALS1-ALS4) may be configured to load an electrode sheet (EST). For example, the electrode sheet (EST) loaded into the first alignment stage (ALS1) may be moved counterclockwise by the first rotation unit (LOR1).

[0060] A first alignment measurement unit (ALV1) may be provided adjacent to the sheet alignment unit (ALU). The first alignment measurement unit (ALV1) may be configured to measure the alignment between the alignment stages (ALS1-ALS4) and the electrode sheet (EST). The first alignment measurement unit (ALV1) may inspect the alignment between the electrode sheet and the alignment stage through vision.

[0061] A sheet supply unit (TRU) may be positioned below the third alignment stage (ALS3). The sheet supply unit (TRU) may include first and second stages (STG1, STG2) and a second rotation unit (LOR2). The second rotation unit (LOR2) may have a roller shape or a drum shape that rotates counterclockwise or clockwise. The first and second stages (STG1, STG2) may be arranged at regular intervals along the outer surface of the second rotation unit (LOR2). The second rotation unit (LOR2) may be configured to rotate the first and second stages (STG1, STG2) so that they are repeatedly flipped up and down.

[0062] Each of the first and second stages (STG1, STG2) may be configured to load an electrode sheet (EST). For example, an electrode sheet (EST) loaded onto the first stage (STG1) from a sheet alignment unit (ALU) may be rotated by a second rotation unit (LOR2) and moved to a position on the second stage (STG2). At this time, the first stage (STG1) and the electrode sheet (EST) may be reversed so that the electrode sheet (EST) faces the electrode web (EWB).

[0063] The sheet supply unit (TRU) can be configured to move in a third direction (D3) in a stamping manner. As the sheet supply unit (TRU) moves downward, the electrode sheet (EST) facing the electrode web (EWB) can be stamped (or transferred) onto the electrode web (EWB).

[0064] A feeding roller (FER) may be provided on one side of each of the first and second stages (STG1, STG2). The feeding roller (FER) may be configured to allow the electrode sheet (EST) provided on the electrode web (EWB) to be smoothly detached from the stage (STG1, STG2).

[0065] The electrode web (EWB) can travel along a first direction (D1). The electrode web (EWB) can be supplied as the electrode reel is unwound. The electrode web (EWB) can be provided under the sheet supply unit (TRU) while moving along the first direction (D1).

[0066] The electrode web (EWB) may include the cathode layer (200) or the anode layer (100) described above with reference to FIG. 1. In one embodiment of the present invention, when the electrode sheet (EST) includes the anode layer (100), the electrode web (EWB) may include a plurality of cathode layers (200) arranged along the first direction (D1). For example, the plurality of cathode layers (200) may be connected to each other to form one cathode layer (200). In another embodiment of the present invention, when the electrode sheet (EST) includes the cathode layer (200), the electrode web (EWB) may include a plurality of anode layers (100) arranged along the first direction (D1). For example, the plurality of anode layers (100) may be connected to each other to form one anode layer (100).

[0067] The electrode sheet (EST) may be the anode and the electrode web (EWB) may be the cathode, or the electrode sheet (EST) may be the cathode and the electrode web (EWB) may be the anode. Although not particularly limited, in the examples described below, the electrode sheet (EST) is exemplified as the anode and the electrode web (EWB) is the cathode.

[0068] A second alignment measuring unit (ALV2) may be provided on the electrode web (EWB). The second alignment measuring unit (ALV2) may inspect the alignment of the electrode web (EWB) through vision.

[0069]

[0070] FIGS. 3 to 7 are perspective views illustrating a method for manufacturing an all-solid-state battery according to embodiments of the present invention. In this embodiment, a method for manufacturing the all-solid-state battery of FIG. 1 using the laminating device of FIG. 2 described above is described.

[0071] Referring to FIG. 3, an electrode web (EWB) can run along a first direction (D1). The electrode web (EWB) can include a negative electrode layer (200). Specifically, the electrode web (EWB) can include a negative electrode current collector (210) and a negative electrode coating layer (220) described in FIG. 1. The electrode web (EWB) can further include first electrode tabs (TPP1). The first electrode tabs (TPP1) can be provided at regular intervals along the first direction (D1).

[0072] An electrode sheet (EST) can be provided on an electrode web (EWB) by a sheet supply unit of the stacking device of FIG. 2. The electrode web (EWB) and the electrode sheet (EST) stacked thereon can form a single stacked structure (STS). The stacked structure (STS) can be manufactured into an all-solid-state battery (10) as described in FIG. 1 through a subsequent process.

[0073] Referring again to FIG. 3, an electrode sheet (EST) may be provided on one side (TS) of a stage (STG). The electrode sheet (EST) may include a positive electrode layer (100). Specifically, the electrode sheet (EST) may include a positive electrode current collector (110) and a positive electrode active material layer (120) described in FIG. 1. The electrode sheet (EST) may further include a second electrode tab (TPP2). The electrode sheet (EST) may be provided onto the stage (STG) from a sheet alignment unit (ALU of FIG. 2). A feeding roller (FER) may be provided on one side of the stage (STG). The feeding roller (FER) may be adjacent to the electrode sheet (EST) in a direction opposite to the first direction (D1).

[0074] Referring to Fig. 4, the stage (STG) can be rotated and inverted. This allows one side (TS) of the stage (STG) to face the electrode web (EWB). For example, the stage (STG) can be rotated 180 degrees by the second rotation part (LOR2) of Fig. 2. By rotating the stage (STG), the electrode sheet (EST) can be inverted. The inverted electrode sheet (EST) can be adjacent to the electrode web (EWB) and face the electrode web (EWB).

[0075] Referring to FIG. 5, the stage (STG) can be moved downward so that the electrode sheet (EST) can contact the electrode web (EWB). The electrode sheet (EST) can be laminated (or settled) on the electrode web (EWB).

[0076] Referring to Fig. 6, the feeding roller (FER) can release the electrode sheet (EST) from the stage (STG) by rotating counterclockwise. Since the electrode web (EWB) moves in the first direction (D1), the feeding roller (FER) can rotate accordingly. As a result, the electrode sheet (EST) can be stably attached on the electrode web (EWB) and move together with the electrode web (EWB) in the first direction (D1).

[0077] Referring to Fig. 7, the stage (STG) can be rotated and inverted. This allows one side (TS) of the stage (STG) to be exposed upward again. The stage (STG) can then be returned to the position shown in Fig. 3. Thereafter, the processes of Figs. 3 to 6 can be repeated.

[0078] In one embodiment of the present invention, after the electrode sheet (EST) is laminated on the electrode web (EWB), first and second sealing members (SEU1, SEU2) may be provided at both ends of the laminated structure (STS), respectively. The first sealing member (SEU1) may cap the first electrode tab (TPP1) and simultaneously secure the electrode web (EWB) and the electrode sheet (EST). The second sealing member (SEU2) may cap the second electrode tab (TPP2) and simultaneously secure the electrode web (EWB) and the electrode sheet (EST). The first and second sealing members (SEU1, SEU2) may be configured to maintain alignment between the electrode sheet (EST) and the electrode web (EWB) in a subsequent process. The first and second sealing members (SEU1, SEU2) may be removed in a subsequent process.

[0079] According to embodiments of the present invention, as a subsequent process, a pressing process may be performed on the laminated structure (STS) that runs along the web in the first direction (D1). Through the pressing process, the solid electrolyte layer (300) may become dense. Through the pressing process, the interfacial resistance between the solid electrolyte layer (300) and the electrode layers (100, 200) may be reduced. In one embodiment, the pressing process may include roll pressing. The manufacturing process of the all-solid-state battery according to the present invention may be performed as a web process that runs along the first direction. Thus, the laminated structures (STS) may be continuously pressed through roll pressing.

[0080] A notching process may be performed after the pressing process. Through the notching process, the web may be divided into multiple laminated structures (STS). The all-solid-state battery (10) of FIG. 1 may be manufactured using the cut laminated structures (STS).

[0081] According to embodiments of the present invention, an electrode sheet (EST) can be stably attached onto a moving electrode web (EWB) by stamping an inverted stage (STG) onto the electrode web (EWB). That is, rather than laminating the electrode sheet (EST) by having the stage (STG) track the moving electrode web (EWB), the electrode sheet (EST) can be laminated onto the electrode web (EWB) by stamping after the stage (STG) has been inverted. This simplifies the laminating operation and improves the alignment between the electrode web (EWB) and the electrode sheet (EST).

[0082] According to embodiments of the present invention, an electrode sheet (EST) can be stably attached onto a moving electrode web (EWB) through a feeding roller (FER) provided on one side of a stage (STG). While the electrode sheet (EST) is transferred from the stage (STG) to the electrode web (EWB), misalignment may occur between the electrode sheet (EST) and the electrode web (EWB) due to the movement of the electrode web (EWB). However, according to the present invention, even when the electrode web (EWB) is moving through the feeding roller (FER), the electrode sheet (EST) can be naturally transferred from the stage (STG) to the electrode web (EWB). As a result, the alignment between the electrode web (EWB) and the electrode sheet (EST) can be improved.

[0083]

[0084] While embodiments of the present invention have been described with reference to the attached drawings, the present invention may be implemented in other specific forms without altering the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and are not limiting.

Claims

1. Including a magazine unit, a sheet transport unit, a sheet alignment unit and a sheet supply unit, The above magazine unit is configured to supply electrode sheets, The above sheet transport unit is configured to pick up the electrode sheet and transport it to the sheet alignment unit, The above sheet alignment unit is configured to determine whether the electrode sheet is aligned, The above sheet supply unit is configured to laminate the electrode sheet on the electrode web, The above sheet supply unit includes a stage on which the electrode sheet is loaded and a feeding roller provided on one side of the stage, The above feeding roller is a laminating device configured to detach the electrode sheet from the stage and attach it onto the electrode web.

2. In paragraph 1, The above sheet supply unit further includes a rotation section, The above stage is provided on the outer surface of the above rotation part, The above rotation unit is a stacking device configured to rotate the stage so that the stage is reversed.

3. In paragraph 1, The above sheet alignment unit: an alignment stage into which the electrode sheet is loaded; and A laminating device including an alignment measuring unit for checking alignment between the alignment stage and the electrode sheet.

4. In paragraph 1, The above sheet alignment unit further includes a rotation part, The above alignment stage is provided on the outer surface of the above rotation part, The above rotation unit is a stacking device configured to rotate the alignment stage so that the alignment stage is reversed.

5. In paragraph 1, The above sheet transfer unit: A sheet picking unit for picking the above electrode sheet; and A laminating device including a transfer device for transferring the electrode sheet from the magazine unit to the sheet alignment unit.

6. In paragraph 1, The above electrode sheet includes a first electrode layer, The above electrode web includes a second electrode layer, The above first electrode layer is either an anode layer or a cathode layer, A laminated device wherein the second electrode layer is another one of the anode layer and the cathode layer.

7. In paragraph 6, A laminated device wherein the electrode sheet further comprises a solid electrolyte layer provided on the first electrode layer.

8. In paragraph 6, A laminated device wherein the electrode web further comprises a solid electrolyte layer provided on the second electrode layer.

9. In paragraph 1, The above electrode web runs in the first direction, The electrode web is a laminated device including a plurality of electrode tabs arranged along the first direction.

10. Driving the electrode web along the first direction; Supplying electrode sheets onto the stage; Inverting the stage so that the electrode sheet faces the electrode web; and Including attaching the electrode sheet onto the electrode web, A method for manufacturing an all-solid-state battery, wherein the electrode sheet is detached from the stage and attached onto the electrode web through a feeding roller provided on one side of the stage.

11. In paragraph 10, The above electrode sheet is provided on one side of the stage, A method for manufacturing an all-solid-state battery, wherein the stage is inverted so that the one side faces the electrode web.

12. In paragraph 10, A method for manufacturing an all-solid-state battery, wherein attaching the electrode sheet comprises stamping the inverted stage onto the electrode web.

13. In paragraph 10, A method for manufacturing an all-solid-state battery, further comprising inverting the stage again after attaching the electrode sheet onto the electrode web.

14. In paragraph 10, A method for manufacturing an all-solid-state battery, further comprising providing a sealing member that fixes the electrode sheet attached to the electrode web.

15. In paragraph 10, The above electrode sheet includes a first electrode layer, The above electrode web includes a second electrode layer, The above first electrode layer is either an anode layer or a cathode layer, A method for manufacturing an all-solid-state battery, wherein the second electrode layer is another one of the positive electrode layer and the negative electrode layer.

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