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

Abstract

The present invention relates to a stacking apparatus and an all-solid-state battery manufacturing method using same. More specifically, the stacking apparatus of the present invention comprises a web supply unit, a magazine unit, a sheet supply unit, and a sheet fixing unit. The sheet fixing unit includes a circulation belt and a clamp provided at one side of the circulation belt, the circulation belt is configured to circulate the clamp along a first direction, and the clamp is configured to fix an electrode sheet onto a pouch web.

Description

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

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

[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] All-solid-state batteries are being proposed, replacing the electrolyte with a solid electrolyte. By eliminating the use of flammable organic dispersion media, all-solid-state batteries can significantly reduce the risk of fire or explosion in the event of a short circuit.

[0005]

[0006] The problem to be solved by the present invention is to provide a stacking device for an all-solid-state secondary battery.

[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-mentioned stacking device.

[0008]

[0009] According to one embodiment of the present invention, a stacking device is provided, including a web supply unit, a magazine unit, a sheet supply unit, and a sheet fixing unit, wherein the web supply unit is configured to allow a pouch web to travel in a first direction, the pouch web includes a space for accommodating an electrode sheet, the magazine unit is configured to accommodate a plurality of electrode sheets, the sheet supply unit is configured to pick up the electrode sheet from the magazine unit and place it in the space of the pouch web, the sheet fixing unit includes a circulation belt and a clamp provided on one side of the circulation belt, the clamp is configured to fix the electrode sheet placed in the space onto the pouch web, and the circulation belt is configured to allow the clamp to circulate in the first direction.

[0010] In another embodiment of the present invention, a method for manufacturing an all-solid-state battery using a stacking device including a web supply unit, a magazine unit, a sheet supply unit, and a sheet fixing unit is provided, the method comprising: running a pouch web along a first direction; the pouch web including a space for accommodating an electrode sheet; seating a first electrode sheet within the space of the running pouch web; fixing the seated first electrode sheet with a first clamp; running the first clamp fixing the first electrode sheet along the first direction; and detaching the first clamp from the first electrode sheet.

[0011]

[0012] Using the laminating device of the present invention, sheet-formed electrodes can be laminated, and then a monocell can be manufactured through line pressure.

[0013] A monocell can be manufactured through a line process using the all-solid-state battery manufacturing method of the present invention.

[0014]

[0015] FIG. 1 is a cross-sectional view illustrating an all-solid-state battery according to embodiments of the present invention.

[0016] Figure 2 is a front view illustrating a method for manufacturing an all-solid-state battery according to an embodiment of the present invention.

[0017] FIG. 3 is a perspective view illustrating a stacking device of an all-solid-state battery according to embodiments of the present invention.

[0018] FIGS. 4A and 4B are perspective views illustrating a pouch web according to embodiments of the present invention.

[0019] FIGS. 5 to 16 are perspective views illustrating a method for manufacturing an all-solid-state battery according to embodiments of the present invention.

[0020]

[0021] 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.

[0022] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. Furthermore, in the drawings, the thicknesses of the components are exaggerated for the sake of clarity. Parts designated by the same reference numerals throughout the specification represent the same components.

[0023] The embodiments described herein will be described with reference to cross-sectional, plan, and / or perspective views, which are ideal illustrations of the present invention. While terms such as "first," "second," etc., 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.

[0024] 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.

[0025] FIG. 1 is a cross-sectional view illustrating an all-solid-state battery according to embodiments of the present invention. Referring to FIG. 1, a monocell (10) of an all-solid-state battery according to one embodiment of the present invention is illustrated. The monocell (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 monocell (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).

[0026] 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.

[0027] 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.

[0028] 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).

[0029] 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.

[0030] 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 Bb O 2-c D c (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05), LiE 2-b B b O 4-c D c (0≤b≤0.5, 0≤c≤0.05), Li a Ni 1-b-c Co b B c D α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni 1-b-c Co b B c O 2-α F α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni 1-b-c Mr b B c D α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α≤2), Li a Ni 1-b-c Mr b B c O 2-α F α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni b HAVE BEEN c G d O2(0.90≤a≤1, 0≤b≤0.9, 0≤c≤0.5, 0.001≤d≤0.1), Li a Ni b Co c Mr 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 bO2(0.90≤a≤1, 0.001≤b≤0.1), Li a Mn2GbO4(0.90≤a≤1, 0.001≤b≤0.1), QO2, QS2, LiQS2, V2O5, LiV2O5, LiIO2, LiNiVO4, Li 3-f J2(PO4)3(0≤f≤2), Li 3-f It may be a compound represented by any one of Fe2(PO4)3(0≤f≤2), LiFePO4. In these compounds, the capital letter “A” is Ni, Co, Mn, or a combination thereof, the capital letter “B” is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, or a combination thereof, the capital letter “D” is O, F, S, P, or a combination thereof, the capital letter “E” is Co, Mn, or a combination thereof, the capital letter “F” is F, S, P, or a combination thereof, the capital letter “G” is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof, the capital letter “Q” is Ti, Mo, Mn, or a combination thereof, the capital letter “I” is Cr, V, Fe, Sc, Y, or a combination thereof, and the capital letter “J” is V, Cr, Mn, Co, Ni, Cu, or a combination thereof.

[0031] 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 arranged alternately and regularly in the direction, and each atomic layer thereby forms a two-dimensional plane. The "cubic rock salt structure" refers to the sodium chloride type (NaCl type) structure, which is a type of crystal structure, and specifically refers to a structure in which the face-centered cubic lattice (fcc) formed by each cation and anion is arranged with a displacement of half of the ridge of the unit lattice. Lithium transition metal oxides having this layered rock salt structure include, for example, LiNi x Co y Al z O2(NCA) or LiNi x Co y Mn z O2(NCM) (0 <x<1,0<y<1, 0<z<1, x+y+z=1) 등의 삼원계 리튬전이금속산화물일 수 있다. 양극 활물질이 층상암염형 구조를 갖는 삼원계 리튬전이금속산화물을 포함하는 경우, 전고체 전지(10)의 에너지 밀도가 커지고 열안정성이 향상될 수 있다.

[0032] 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.

[0033] When the positive electrode active material includes nickel (Ni) as a ternary lithium transition metal oxide such as NCA or NCM, for example, the capacity density of the all-solid-state battery (10) can be increased, thereby reducing metal dissolution of the positive electrode active material in a charged state. As a result, the cycle characteristics of the all-solid-state battery (10) in a charged state can be improved. Meanwhile, the “cycle characteristics” are characteristics indicating the degree to which the all-solid-state battery (10) is deteriorated due to charge / discharge of the all-solid-state battery (10). An all-solid-state battery (10) with high cycle characteristics can have a small degree of deterioration of the all-solid-state battery (10) due to charge / discharge, and an all-solid-state battery (10) with low cycle characteristics can have a large degree of deterioration of the all-solid-state battery (10) due to charge / discharge.

[0034] 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.

[0035] 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).

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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).

[0051] 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.

[0052] 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).

[0053] 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).

[0054] According to embodiments of the present invention, the width (or width) of the anode layer (100) may be the same as the width (or width) of the cathode layer (200). For example, the anode layer (100) may have a first width (W1) in a first direction (D1), and the cathode layer (200) may have a second width (W2) in the first direction (D1). The first width (W1) may be the same as the second width (W2).

[0055] According to embodiments of the present invention, the width (or widths) of the anode layer (100) may be smaller than the width (or widths) of the cathode layer (200). For example, the first width (W1) may be smaller than the second width (W2).

[0056] According to embodiments of the present invention, the width (or widths) of the anode layer (100) may be greater than the width (or widths) of the cathode layer (200). For example, the first width (W1) may be greater than the second width (W2).

[0057] The solid electrolyte layer (300) may include a positive electrode electrolyte layer (300a) and a negative electrode electrolyte layer (300b). The positive electrode electrolyte layer (300a) and the negative electrode electrolyte layer (300b) may be laminated to form a single solid electrolyte layer (300). The positive electrode electrolyte layer (300a) may be in contact with the positive electrode active material layer (120), and the negative electrode electrolyte layer (300b) may be in contact with the negative electrode coating layer (220).

[0058] In one embodiment of the present invention, the positive electrolyte layer (300a) and the negative electrolyte layer (300b) may include solid electrolytes having the same composition. In another embodiment of the present invention, the positive electrolyte layer (300a) and the negative electrolyte layer (300b) may include solid electrolytes having different compositions.

[0059] FIG. 2 is a front view illustrating an all-solid-state battery manufacturing facility according to one embodiment of the present invention.

[0060] Referring to FIG. 2, the all-solid-state battery manufacturing equipment of the present invention may include a first laminating device (1000a) for laminating a first electrode sheet, a second laminating device (1000b) for laminating a second electrode sheet, a lamination unit (2000), a press unit (3000), and a cell discharge unit (4000).

[0061] The first stacking device (1000a) and the second stacking device (1000b) may include the configuration of the stacking device (1000) described below. For example, the first stacking device (1000a) may be configured such that the first electrode sheet is placed on the pouch web (500). The second stacking device (1000b) may be configured such that the second electrode sheet (400b) is placed on the first electrode sheet (400a) placed on the pouch web (500).

[0062] In one embodiment of the present invention, the lamination unit (2000) may be configured to attach the first electrode sheet (400a) and the second electrode sheet (400b). For example, the lamination unit (2000) may include a pair of lamination rollers (2100). In one embodiment of the present invention, the lamination unit (2000) may roll a laminate (400c) in which the first electrode sheet (400a) and the second electrode sheet (400b) are sequentially laminated, thereby attaching the first electrode sheet (400a) and the second electrode sheet (400b).

[0063] In one embodiment of the present invention, the press unit (3000) may be configured to press the laminate (400c). In addition, the press unit (3000) may be configured to heat the first electrode sheet and the second electrode sheet. For example, the press unit (3000) may include a heater (3100) and a press roller (3200). In one embodiment of the present invention, the press unit (3000) may be configured to heat and then press the laminate (400c).

[0064] In one embodiment of the present invention, the cell discharge unit (4000) may be configured to discharge manufactured cells onto a pouch web (500). The pouch web (500) from which cells have been discharged may be wound onto a pouch reel.

[0065]

[0066] FIG. 3 is a perspective view for more specifically explaining a stacking device among all-solid-state battery manufacturing facilities according to embodiments of the present invention.

[0067] Referring to FIG. 3, the stacking device (1000) may include a web supply unit (600), a magazine unit (700), a sheet supply unit (800), and a sheet fixing unit (900).

[0068] A first web supply unit (600a) and a second web supply unit (600b) may be provided at each end of the stacking device (1000). Each of the first and second web supply units (600a, 600b) may be configured to cause the pouch web (500) to travel in the first direction (D1). For example, each of the first and second web supply units (600a, 600b) may include a feeding belt (610) capable of causing the pouch web (500) to travel.

[0069] Referring to FIG. 4a, the pouch web (500) may include a space (510) capable of accommodating an electrode sheet. An electrode sheet (400) may be placed in the space (510). The electrode sheet (400) may include 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 (400) may include the positive electrode layer (100) or the negative electrode layer (200) and a solid electrolyte layer (300 of FIG. 1) formed thereon. For example, the electrode sheet (400) may include the positive electrode layer (100) and a positive electrode electrolyte layer (300a of FIG. 1) formed thereon, or the negative electrode layer (200) and a negative electrode electrolyte layer (300b of FIG. 1) formed thereon. In another embodiment of the present invention, the solid electrolyte layer may be omitted from the electrode sheet (400).

[0070] In one embodiment of the present invention, the pouch web (500) includes a plurality of spaces (510) arranged at regular intervals in the first direction (D1), so that a plurality of electrode sheets (400) can be placed at regular intervals in the first direction (D1).

[0071] In one embodiment of the present invention, the thickness of the space (510) may be greater than the thickness of the monocell (10) described with reference to FIG. 1, thereby allowing the monocell (10) to be moved stably.

[0072] Referring to FIG. 4b, the pouch web (500) may be manufactured by bonding a guide gasket (530) having a plurality of holes formed on a bottom sheet (520). Each of the plurality of holes may correspond to a space (510). The hole formed in the guide gasket (530) may be of a size sufficient to allow the electrode sheet (400) to pass through.

[0073] Although not shown, the pouch web (500) may be manufactured by performing a deep drawing process on a bottom sheet made of a flexible material.

[0074] The pouch web (500) can travel along the first direction (D1). The pouch web (500) can be supplied as the pouch reel unwinds. The pouch web (500) can be provided under the sheet supply unit (800) while moving along the first direction (D1).

[0075] A plurality of electrode sheets (400) can be loaded into the magazine unit (700). The magazine unit (700) can be configured to sequentially supply the loaded electrode sheets (400). In one embodiment of the present invention, the electrode sheets (400) can be supplied from a plurality of magazine units (700), and thus, a plurality of electrode sheets (400) can be supplied at one time. The number of electrode sheets (400) supplied at one time can vary depending on the running speed of the pouch web (500). For example, if the running speed of the pouch web (500) increases, the number of supplied electrode sheets (400) can increase.

[0076] The sheet supply unit (800) may include a sheet picking unit (810) and a transfer unit (820). The sheet picking unit (810) may be configured to pick up electrode sheets (400) supplied from the magazine unit (700). For example, the sheet picking unit (810) may include a suction means capable of sucking up the electrode sheets (400). In one embodiment of the present invention, the sheet supply unit (800) may include a plurality of sheet picking units (810) so as to be able to pick up a plurality of electrode sheets (400).

[0077] The transfer device (820) may be configured to transfer the picked electrode sheet (400) to the pouch web (500). For example, the transfer device (820) may include a support (821) and a transfer unit (822). In one embodiment of the present invention, the transfer unit (822) moves the transfer sheet picking unit (810) from the magazine unit (700) to the space (510) of the pouch web (500), so that the pouch web (500) may be provided under the sheet picking unit (810).

[0078] The sheet fixing unit (900) may include a circulation belt (910) and a clamp (920) provided on one side of the circulation belt (910).

[0079] The circulation belt (910) may be configured such that the clamp (920) circulates along the first direction (D1). For example, as the circulation belt (910) circulates, the clamp (920) provided on one side of the circulation belt (910) may run along the electrode sheet (400) mounted on the pouch web (500) in the first direction (D1).

[0080] In one embodiment of the present invention, the circulating belt (910) may be configured so that the clamp (920) runs at the same speed as the pouch web (500).

[0081] In one embodiment of the present invention, the circulation belt (910) can continuously circulate without stopping, and accordingly, the clamp (920) can also continuously circulate without stopping.

[0082] Although not shown in the drawing, the sheet fixing unit (900) may further include a horizontal driving unit and a vertical driving unit for moving the clamp (920). The horizontal driving unit may be configured to move the clamp (920) in a second direction (D2) intersecting the first direction (D1). The vertical driving unit may be configured to move the clamp (920) in a vertical direction. In one embodiment of the present invention, the vertical driving unit may be configured to move only one side of the clamp (920) in the vertical direction. Through this, the clamp (920) may be moved in the second direction (D2) and then one side may be lowered to be positioned on the electrode sheet (400).

[0083] The clamp (920) may be configured to secure the electrode sheet (400) onto the pouch web (500). For example, the clamp (920) may secure the electrode sheet (400) by gripping the electrode sheet (400).

[0084] In one embodiment of the present invention, the clamp (920) can travel in the first direction (D1) at the same speed as the pouch web (500). For example, the first speed of the pouch web (500) traveling in the first direction may be the same as the second speed of the clamp (920) traveling in the first direction.

[0085] In one embodiment of the present invention, the clamp (920) can move in the first direction (D1) while holding the electrode sheet (400).

[0086] In one embodiment of the present invention, the sheet fixing unit (900) may include a plurality of clamps (920), and the plurality of clamps (920) may be arranged on the circulating belt at predetermined intervals along the first direction (D1). The plurality of clamps (920) may fix each of the electrode sheets (400) placed on the pouch web (500).

[0087] Although not shown, the clamp (920) may further include a sensor. The sensor may detect the placement of the electrode sheet (400) on the pouch web (500). When the sensor detects the placement of the electrode sheet (400), the clamp may move to the placed electrode sheet (400) and secure the sheet (400).

[0088] The clamp (920) may be configured to release the fixed electrode sheet (400) before it enters the second web supply unit (600b) or the lamination unit (2000). For example, the clamp (920) may release the fixed electrode sheet (400) by detaching it from the electrode sheet (400) before it enters the second web supply unit (600b).

[0089]

[0090] FIGS. 5 to 16 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 is described using the laminating device described above with reference to FIG. 3. The first laminating device (1000a) and the second laminating device (1000b) are embodiments of the laminating device described above with reference to FIG. 3.

[0091] The first electrode sheet (400a) and the second electrode sheet (400b) are the same as the electrode sheet (400) described above, and are described as the first electrode sheet (400a) and the second electrode sheet (400b) in the order in which they are placed on the pouch web (500).

[0092] Referring to FIGS. 5 to 10, a first electrode sheet (400a) can be placed on a pouch web (500) that runs using a first stacking device (1000a).

[0093] Referring to FIG. 5, a pouch web (500) can travel along a first direction (D1). The pouch web can be supplied as the pouch reel is unwound, and the pouch web (500) can travel in the first direction (D1) by the first and second web supply units (600a, 600b) of FIG. 3. Specifically, the first and second web supply units (600a, 600b) can be feeding belts.

[0094] Referring to FIGS. 5 to 7, a first electrode sheet (400a) can be placed in a space (510, see FIG. 4A) of a pouch web (500) by a sheet supply unit (800). For example, a sheet picking unit (810) can adsorb the first electrode sheet (400a) in a magazine unit (700). A transfer machine can place the first electrode sheet (400a) on the pouch web (500) by transporting the sheet picking unit (810) to the space (510) of the pouch web (500). After the first electrode sheet (400a) is placed on the pouch web (500), a transfer machine (820) can transport the sheet picking unit (810) back to the magazine unit (700). Through this, the sheet picking unit (810) can be positioned on the first electrode sheet (400a) to be next placed in the magazine unit (700).

[0095] Referring to FIGS. 8 and 9, a first electrode sheet (400a) mounted on a pouch web (500) can be fixed by a sheet fixing unit (800). Specifically, a first clamp (920a) provided on one side of a circulation belt (910) can fix the first electrode sheet (400a) mounted on the pouch web (500) by gripping the first electrode sheet (400a). For example, after the first clamp (920) moves in the second direction (D2) and the vertical direction, the first electrode sheet (400a) can be gripped and fixed.

[0096] Referring to FIGS. 9 and 10, as the circulation belt (910) runs in a circular motion, the first clamp (920) provided on one side of the circulation belt (910) can move in the first direction (D1).

[0097] In one embodiment of the present invention, the first clamp (920) can travel in the first direction (D1) at the same speed as the pouch web (500). For example, the first speed of the pouch web (500) traveling in the first direction may be the same as the second speed of the first clamp (920) traveling in the first direction.

[0098] In one embodiment of the present invention, the first clamp (920) can move in the first direction (D1) while holding the first electrode sheet (400a).

[0099] Referring to Fig. 10, before the first electrode sheet (400a) enters the second web supply unit (600b), the clamp can be released and recovered by the circulation belt (910). For example, before the first electrode sheet (400a) enters the second web supply unit (600b), the first clamp (920) can be detached from the first electrode sheet (400a) and recovered by the circulation belt (910). The released first electrode sheet (400a) can continue to travel in the first direction (D1).

[0100] Referring to FIGS. 11 to 16, a second electrode sheet (400b) can be placed on a pouch web (500) that runs using a second stacking device (1000b).

[0101] The second stacking device (1000b) may include a web supply unit (600'), a magazine unit (700'), a sheet supply unit (800'), and a sheet fixing unit (900'). The web supply unit (600') may include a first supply unit (600a'). The sheet supply unit (800') may include a sheet picking unit (810') and a transfer unit (820'). The transfer unit (820') may include a support (821') and a conveying unit (822'). The sheet fixing unit (900') may include a circulation belt (910') and a second clamp (920') provided on one side of the circulation belt (910').

[0102] The placement of the second electrode sheet (400b) within the pouch web (500) can be performed in the same process as the placement of the first electrode sheet (400a) within the pouch web (500).

[0103] For example, it may include: mounting a second electrode sheet (400b) on a pouch web (500) on which a first electrode sheet (400a) is mounted; fixing the mounted second electrode sheet (400b) with a second clamp (920'); moving the second clamp (920') that is fixing the second electrode sheet along the second direction; and detaching the second clamp (920') from the second electrode sheet (400b). Through this, a laminate (400c) in which the second electrode sheet (400b) is laminated on the first electrode sheet (400a) can be formed.

[0104] In one embodiment of the present invention, the second clamp (920') can travel in the first direction (D1) at the same speed as the pouch web (500). For example, the first speed of the pouch web (500) traveling in the first direction may be the same as the second speed of the second clamp (920') traveling in the first direction.

[0105] In one embodiment of the present invention, the second clamp (920') can move in the first direction (D1) while holding the second electrode sheet (400b).

[0106] In one embodiment of the present invention, before the second electrode sheet (400b) enters the lamination unit (2000), the second clamp (920') can be released and recovered by the circulation belt (910') (see FIG. 16).

[0107] The second electrode sheet (400b) may include an electrode layer (anode layer or cathode layer) different from the electrode layer (anode layer or cathode layer) included in the first electrode sheet (400a) and an electrolyte layer formed thereon. For example, the first electrode sheet (400a) may include an anode layer (100) and an anode electrolyte layer (300a), and the second electrode sheet (400b) may include a cathode layer (200) and an anode electrolyte layer (300b).

[0108] A laminate (400c) can be formed by placing a second electrode sheet (400b) on a first electrode sheet (400a).

[0109] According to embodiments of the present invention, as a subsequent process, a lamination process and a pressing process may be performed on a laminate (400c) that runs along a web in a first direction (D1). After the pressing process, the laminate (400c) may be discharged in a monocell form.

[0110] Referring to FIG. 2, a pouch web (500) on which a laminate (400c) is mounted can be subjected to a lamination process by a lamination unit (2000) while traveling along the first direction (D1).

[0111] In one embodiment of the present invention, the lamination process may include a rolling process. Through the lamination process, the first electrode sheet and the second electrode sheet (400b) can be stably attached. For example, the positive electrolyte layer (300a) of the first electrode sheet and the negative electrolyte layer (300b) of the second electrode sheet (400b) can be stably attached.

[0112] Referring to FIG. 2, a pouch web (500) on which a laminate (400c) is mounted can be subjected to a pressing process by a press unit (3000) while traveling along the first direction (D1).

[0113] In one embodiment of the present invention, the pressing process may include a heating process. In one embodiment of the present invention, the pressing process may include a roll pressing process. The solid electrolyte layer (300) may become dense through the pressing process. The pressing process may activate the interface. For example, the pressing process may activate the interface between the positive electrolyte layer (300a) and the negative electrolyte layer (300b).

[0114] The monocell manufactured through the pressing process can be discharged by the discharge unit (4000) while traveling in the first direction (D1). The remaining pouch web can be wound around a pouch reel and recovered.

[0115] According to embodiments of the present invention, a sheet-shaped electrode can be transported through a line.

[0116] According to embodiments of the present invention, high pressure can be applied to a line-running laminate (400c) through roll pressing.

[0117] 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 web supply unit, a magazine unit, a sheet supply unit and a sheet fixing unit, The above web supply unit is configured such that the pouch web runs in a first direction, and the pouch web includes a space for accommodating an electrode sheet, The above magazine unit is configured to accommodate a plurality of electrode sheets, The above sheet supply unit is configured to pick the electrode sheet from the magazine unit and place it into the space of the pouch web, The above sheet fixing unit includes a circulation belt and a clamp provided on one side of the circulation belt, The above clamp is configured to secure the electrode sheet settled in the above space onto the pouch web, A stacking device in which the above-mentioned circular belt is configured to cause the above-mentioned clamp to circulate in the first direction.

2. In paragraph 1, The above sheet transfer supply unit: A picking section for picking the above electrode sheet; and A stacking device including a transfer device for transferring the picking portion from the magazine unit to the pouch web.

3. In the first paragraph, the clamp includes a plurality of clamps arranged at a predetermined interval along the first direction, The above plurality of clamps are a stacking device connected to the above circular belt.

4. In the first paragraph, the sheet fixing unit: a horizontal driving unit configured to move the clamp in a second direction intersecting the first direction; and A stacking device comprising a vertical driving unit configured to move the clamp in a vertical direction.

5. A laminating device in which the pouch web has the same first speed at which it travels in the first direction and the clamp has the same second speed at which it travels in the first direction in the first paragraph.

6. In the first paragraph, the clamp is a stacking device that moves in the first direction while holding the electrode sheet that is positioned in the space.

7. In paragraph 1, The above electrode sheet includes an electrode layer, A laminated device, wherein the electrode layer is one of an anode layer and a cathode layer.

8. In paragraph 7, A laminated device wherein the electrode sheet further includes a solid electrolyte layer provided on the electrode layer.

9. Running the pouch web along the first direction, the pouch web including a space for accommodating an electrode sheet; Placing a first electrode sheet within the space of the above-described pouch web while driving; Fixing the settled first electrode sheet with a first clamp; Moving the first clamp that holds the first electrode sheet along the first direction; A method for manufacturing an all-solid-state battery, comprising detaching the first clamp from the first electrode sheet.

10. In the 9th paragraph, the first clamp is arranged in plurality at a predetermined interval along the first direction on one side of the first circulation belt, A method for manufacturing an all-solid-state battery, wherein a plurality of first clamps are each brought into contact with the first electrode sheet to fix the plurality of first electrode sheets.

11. A method for manufacturing an all-solid-state battery in accordance with claim 9, wherein the first speed at which the pouch web travels in the first direction and the second speed at which the first clamp travels in the first direction are the same.

12. In the 9th paragraph, after the first clamp is removed, the pouch web is continuously moved along the first direction; Placing a second electrode sheet on the pouch web on which the first electrode sheet is placed; Fixing the settled second electrode sheet with a second clamp; and A method for manufacturing an all-solid-state battery, further comprising detaching the second clamp from the second electrode sheet.

13. A method for manufacturing an all-solid-state battery in claim 12, wherein the first speed at which the pouch web travels in the first direction and the second speed at which the second clamp travels in the first direction are the same.

14. A method for manufacturing an all-solid-state battery, further comprising laminating a pouch web on which the second electrode sheet is fixed in the 12th paragraph.

15. A method for manufacturing an all-solid-state battery, further comprising pressing a pouch web on which the second electrode sheet is fixed in the 12th paragraph.

16. A method for manufacturing an all-solid-state battery in claim 15, wherein the pressing is roll pressing.

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