Apparatus for manufacturing all-solid-state battery, and method for manufacturing all-solid-state battery

Abstract

The present invention relates to an apparatus for manufacturing an all-solid-state battery and, more specifically, to an apparatus for manufacturing an all-solid-state battery, comprising: a lower frame having a lower chamber recess formed on an upper end portion thereof, the lower chamber recess being recessed toward the inside of the lower frame; a support protruding upward from the lower chamber recess, the support having a pressing unit seated thereon; an upper frame disposed on the lower frame; a chamber block disposed between the lower frame and the upper frame, the chamber block having a lower end portion where an upper chamber recess is formed to be recessed toward the inside of the chamber block; a heating unit, which is disposed at the lower chamber recess and the upper chamber recess and thermally fuses a heating area (HA) of the pressing unit; and an anti-wrinkle part disposed at the upper chamber recess, wherein the anti-wrinkle part can press the upper portion of the pressing unit so as to prevent wrinkles from being formed on the pressing unit.

Description

Manufacturing apparatus for all-solid-state batteries and manufacturing method for all-solid-state batteries

[0001] The present invention relates to an apparatus for manufacturing an all-solid-state battery and a method for manufacturing an all-solid-state battery, and more specifically, to an apparatus for manufacturing an all-solid-state battery and a method for manufacturing an all-solid-state battery that can improve the isostatic pressurization and density of an all-solid-state battery unit cell by preventing the occurrence of wrinkles when vacuum sealing an all-solid-state battery unit cell with a protective pouch to perform a Warm Isostatic Press (WIP) process.

[0002]

[0003] In response to recent industrial demands, the development of batteries with high energy density and safety is actively underway. Recently, all-solid-state batteries, which replace liquid electrolytes with solid electrolytes, have been proposed. An all-solid-state battery is a battery formed by stacking a positive electrode, a solid electrolyte, and a negative electrode, and then densifying them under pressure; it utilizes a solid electrolyte instead of the liquid electrolyte found in conventional rechargeable batteries. By not using flammable organic dispersion media, all-solid-state batteries can significantly reduce the likelihood of fire or explosion in the event of a short circuit. Consequently, these all-solid-state batteries possess high safety.

[0004] An isotropic pressurization process can be applied to increase the density of all-solid-state batteries.

[0005] One of the isostatic pressurization processes applied in the manufacture of all-solid-state batteries is the Warm Isostatic Press (WIP) process. The Warm Isostatic Press (WIP) process can be referred to as the warm hydrostatic press process, or in other terms, the wet isostatic pressurization process. In the wet isostatic pressurization process, a fluid can be used to pressurize the all-solid-state battery unit cell with uniform pressure from all sides.

[0006] In order to apply the wet isotropic pressurization process, it is necessary to seal and package the solid-state battery unit cells so that the solid-state battery unit cells do not come into contact with the fluid.

[0007] In this case, if the packaging condition is poor, for example, if wrinkles occur in the packaging material, the results of isotropic pressurization may be poor, which can have a negative effect on the density of the all-solid-state battery unit cell.

[0008]

[0009] The problem to be solved by the present invention is to provide an apparatus for manufacturing an all-solid-state battery and a method for manufacturing an all-solid-state battery that can improve the isostatic pressurization and density of an all-solid-state battery unit cell by preventing the occurrence of wrinkles when vacuum sealing the all-solid-state battery unit cell with a protective pouch to perform a Warm Isostatic Press (WIP) process.

[0010]

[0011] According to the concept of the present invention, a manufacturing apparatus for an all-solid-state battery comprises: a lower frame having a lower chamber groove formed at its upper end, wherein the lower chamber groove is formed by being recessed inwardly toward the lower frame; a support protruding upwardly toward the lower chamber groove, wherein a pressure unit is seated on the support; an upper frame disposed on the upper end of the lower frame; a chamber block disposed between the lower frame and the upper frame, wherein an upper chamber groove is formed by being recessed inwardly toward the lower end of the chamber block; a heating unit disposed in the lower chamber groove and the upper chamber groove and configured to heat-fuse a heating area (HA) of the pressure unit; and a wrinkle prevention member disposed in the upper chamber groove; wherein the wrinkle prevention member may be configured to press the upper end of the pressure unit to prevent wrinkles from forming on the pressure unit.

[0012] A method for manufacturing an all-solid-state battery according to another concept of the present invention may include: placing a pressurizing unit on a base; forming a vacuum-forming space and pressing the pressurizing unit; removing gas from the vacuum-forming space and vacuuming the interior of the pressurizing unit; and sealing the pressurizing unit.

[0013]

[0014] The apparatus for manufacturing an all-solid-state battery and the method for manufacturing an all-solid-state battery according to the present invention can prevent wrinkles from forming on the surface of a protective pouch when vacuum sealing an all-solid-state battery unit cell with a protective pouch to perform a Warm Isostatic Press (WIP) process. In other words, the surface of the protective pouch can be made flat so that it adheres closely to the surface of the all-solid-state battery unit cell.

[0015] In addition, the isotropic pressure of the all-solid-state battery unit cell can be increased, which can improve the density of the all-solid-state battery unit cell.

[0016] In addition, it can increase the productivity of secondary batteries and improve product reliability.

[0017]

[0018] FIG. 1a is a cross-sectional view of an all-solid-state battery cell according to embodiments of the present invention.

[0019] FIG. 1b is a diagram showing the arrangement structure between a die plate, a cavity structure, and an all-solid-state battery cell according to embodiments of the present invention.

[0020] FIG. 1c is a drawing showing a state in which an all-solid-state battery cell is placed on a jig formed by combining the die plate and cavity structure disclosed in FIG. 1b.

[0021] FIG. 1d is a drawing showing the state of wrapping the jig disclosed in FIG. 1c with a protective pouch.

[0022] FIG. 1e is a drawing showing the state in which the jig and all-solid-state battery cell disclosed in FIG. 1d are wrapped in a protective pouch to form an opening and a pressurizing unit.

[0023] FIG. 2 is a drawing showing the numerical relationship of the pressurizing unit according to embodiments of the present invention and the state in which wrinkles occur on the protective pouch.

[0024] FIG. 3 is a drawing showing a manufacturing apparatus for an all-solid-state battery according to embodiments of the present invention.

[0025] FIG. 4 is a drawing showing the structure with the upper frame removed in a manufacturing apparatus for an all-solid-state battery according to embodiments of the present invention.

[0026] FIG. 5a is a diagram showing the structure of a chamber block and a wrinkle-prevention part according to embodiments of the present invention.

[0027] FIG. 5b is a diagram showing the arrangement structure of a pressing pad and an elastic sheet according to embodiments of the present invention.

[0028] FIG. 6 is a drawing showing a lower chamber unit according to embodiments of the present invention.

[0029] FIG. 7 is a cross-sectional view of the AA' portion disclosed in FIG. 4.

[0030] FIG. 8 is a drawing showing the state in which the anti-wrinkle part according to embodiments of the present invention presses the protective pouch.

[0031] FIGS. 9a to 9d are drawings showing the operating state of introducing a pressurizing unit into a manufacturing apparatus for an all-solid-state battery according to embodiments of the present invention.

[0032] FIG. 10 is a diagram showing a method for manufacturing an all-solid-state battery according to embodiments of the present invention.

[0033]

[0034] In order to fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can be made. The description of these embodiments is provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention.

[0035] In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, the thicknesses of the components are exaggerated for the effective description of the technical content. Throughout the specification, parts indicated by the same reference numeral represent the same components.

[0036] The embodiments described herein will be described with reference to cross-sectional and / or plan views, which are exemplary illustrations of the invention. In the drawings, the thicknesses of films and regions are exaggerated for effective description of the technical content. Accordingly, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific forms of regions of the device and are not intended to limit the scope of the invention. Although terms such as first, second, third, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments.

[0037] The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components to the mentioned components.

[0038]

[0039] FIG. 1a discloses a unit cell shape of an all-solid-state battery cell (10) according to embodiments of the present invention.

[0040] Referring to FIG. 1a, the all-solid-state battery cell (10) may include a positive electrode layer (20), a negative electrode layer (30) facing the positive electrode layer (20), and a solid electrolyte layer (40) disposed between the positive electrode layer (20) and the negative electrode layer (30). However, the all-solid-state battery cell (10) may further include an additional functional layer, such as an adhesion-enhancing layer, disposed between the positive electrode layer (20) and the solid electrolyte layer (40) or between the negative electrode layer (30) and the solid electrolyte layer (40).

[0041] The positive layer (20) may include a positive current collector (21) and a positive active material layer (23) disposed on the positive current collector (21). The positive active material layer (23) may include a positive active material, a solid electrolyte, a conductive material, and a binder.

[0042] The positive current collector (21) can provide a reference surface on which the positive active material layer (23) is placed. The positive current collector (21) may have a plate or foil form. For example, the positive current collector (21) may 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.

[0043] Unlike as illustrated in FIG. 1a, in one embodiment of the present invention, the positive current collector (21) may be omitted. Although not illustrated, a carbon layer with a thickness of 0.1 μm to 4 μm may be further disposed between the positive current collector (21) and the positive active material layer (23) to increase the bonding strength between the positive current collector (21) and the positive active material layer (23).

[0044] The positive electrode active material may be a material capable of reversibly absorbing and desorbing lithium ions. For example, the positive electrode active material may include lithium transition metal oxides such as lithium cobalt oxide (LCO), lithium nickel oxide, lithium nickel cobalt oxide, lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium manganate, and lithium iron phosphate, nickel sulfide, copper sulfide, lithium sulfide, iron oxide, or vanadium oxide, but is not limited thereto. The positive electrode active material may be a single material or a mixture of two or more materials.

[0045] Lithium transition metal oxides are, for example, Li a A 1-b B b D2(0.90≤a≤1, 0≤b≤0.5), Li a E 1-b B b O 2-c D c (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05), LiE 2-b B b O 4-c D c (0≤b≤0.5, 0≤c≤0.05), Li a Ni 1-b-c Co b B c D α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni 1-b-c Co b B c O 2-α F α (0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α<2), Li a Ni 1-b-c Mn b B c D α(0.90≤a≤1, 0≤b≤0.5, 0≤c≤0.05, 0<α≤2), Li a 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) or LiFePO4. In such a compound, the uppercase “A” is Ni, Co, Mn, or a combination thereof; the uppercase “B” is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, or a combination thereof; the uppercase “D” is O, F, S, P, or a combination thereof; the uppercase “E” is Co, Mn, or a combination thereof; the uppercase “F” is F, S, P, or a combination thereof; the uppercase “G” is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof; the uppercase “Q” is Ti, Mo, Mn, or a combination thereof; the uppercase “I” is Cr, V, Fe, Sc, Y, or a combination thereof; and the uppercase “J” is V, Cr, Mn, Co, Ni, Cu, or a combination thereof.

[0046] The positive electrode active material may include, for example, a lithium salt of a transition metal oxide having a layered rock salt type structure among the lithium transition metal oxides described above. The "layered rock salt type structure" is, for example, a cubic rock salt type structure. <111> It is a structure in which oxygen and metal atomic layers are alternately and regularly arranged in a specific direction, thereby forming a two-dimensional plane for each atomic layer. The "cubic rock salt type structure" represents a sodium chloride (NaCl) type structure, which is a type of crystal structure; specifically, it exhibits a structure in which face-centered cubic lattices (fcc) formed by cations and anions, respectively, are offset from each other by half the ridge of the unit lattice. Lithium transition metal oxides having such a layered rock salt type structure are, for example, LiNi x Co y Al z O2(NCA) or LiNi x Co y 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 셀(10)의 에너지 밀도가 커지고 열안정성이 향상될 수 있다.

[0047] The aforementioned compound contained in the positive electrode active material may be covered by a coating layer (not shown). The positive electrode active material may also be a mixture of the aforementioned compound and the compound to which the coating layer is added. Meanwhile, the coating layer added to the surface of the positive electrode active material may include, for example, oxides, hydroxides, oxyhydroxides, oxycarbonates, or hydroxycarbonates of the following coating elements. The compounds forming this coating layer 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, spray coating or immersion methods.

[0048] When the positive active material is a ternary lithium transition metal oxide such as NCA or NCM and contains nickel (Ni), the capacity density of the all-solid-state battery cell (10) can be increased, and the metal leaching of the positive active material in the charged state can be reduced. As a result, the cycle characteristics of the all-solid-state battery cell (10) in the charged state can be improved. Meanwhile, “cycle characteristics” is a characteristic that indicates the degree of deterioration of the all-solid-state battery cell (10) due to charging and discharging of the all-solid-state battery cell (10). An all-solid-state battery cell (10) with high cycle characteristics has a small degree of deterioration due to charging and discharging, while an all-solid-state battery cell (10) with low cycle characteristics may have a large degree of deterioration due to charging and discharging.

[0049] The shape of the positive electrode active material may include particle shapes such as spheres or ellipsoids. The particle size and content of the positive electrode active material are not particularly limited.

[0050] The solid electrolyte may include a sulfide-based solid electrolyte with excellent lithium ion conductivity characteristics. Sulfide-based solid electrolytes include, for example, Li2S-P2S5, Li2S-P2S5-LiX (where X is a halogen element), Li2S-P2S5-Li2O, Li2S-P2S5-Li2O-LiI, Li2S-SiS2, Li2S-SiS2-LiI, Li2S-SiS2-LiBr, Li2S-SiS2-LiCl, Li2S-SiS2-B2S3-LiI, Li2S-SiS2-P2S5-LiI, Li2S-B2S3, and Li2S-P2S5-Z m S n (m, n are positive numbers, uppercase “Z” is one of Ge, Zn, or Ga), Li2S-GeS2, Li2S-SiS2-Li3PO4, Li2S-SiS2-Li p MO q (p, q are positive numbers, uppercase “M” is one of P, Si, Ge, B, Al, Ga, In), Li 7-x PS 6-x Clx (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).

[0051] Sulfide-based solid electrolytes are, for example, Li 7-x PS 6-x Cl x (0≤x≤2), Li 7-x PS 6-x Br x (0≤x≤2), and Li 7-x PS 6-x I x It may be an argyrodite-type compound comprising one or more selected from (0≤x≤2). In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound comprising one or more selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I. The density of the argyrodite-type solid electrolyte may be 1.5 g / cc to 2.0 g / cc. By having a density of 1.5 g / cc or higher for the argyrodite-type solid electrolyte, the internal resistance of the all-solid-state battery is reduced, and defects such as penetration and short circuit of the solid electrolyte film due to lithium dendrite formation can be prevented. The elastic modulus of the solid electrolyte may be, for example, 15 GPa to 35 GPa.

[0052] The solid electrolyte included in the positive electrode active material layer (23) may have a smaller average particle size (D50) of intermediate particle size compared to the solid electrolyte included in the solid electrolyte layer (40). For example, the average particle size (D50) of the solid electrolyte included in the positive electrode active material layer (23) may be 90% or less, 80% or less, 70% or less, 60% or less, 50% or less, 40% or less, 30% or less, or 20% or less of the average particle size (D50) of the solid electrolyte included in the solid electrolyte layer (40). Meanwhile, the average particle size (D50) may be a median diameter measured using a laser particle size distribution meter.

[0053] The positive active material layer (23) may include a conductive material. The conductive material may have conductivity without causing chemical changes in the all-solid-state battery cell (10), thereby increasing the conductivity of the positive active material and the solid electrolyte. The conductive material may include a carbon-based material. The conductive material may include, for example, one or more selected from graphite, carbon black, acetylene black, carbon nanofibers, and carbon nanotubes.

[0054] The positive active material layer (23) may further include a binder. The binder may include a material for bonding the positive active material, solid electrolyte, and conductive material contained in the positive active material layer (23), and for improving the bonding strength with the positive current collector (21). For example, the binder may include polyvinylidene fluoride, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, vinylidene fluoride / hexafluoropropylene copolymer, polyacrylonitrile, or polymethyl methacrylate.

[0055] When the total of the positive active material, solid electrolyte, conductive material, and binder is 100 parts by weight, the positive active material layer (23) may include 85 to 92 parts by weight of the positive active material. The positive active material layer (23) may include 0.5 to 1.5 parts by weight of the binder.

[0056] In the positive active material layer (23), the conductive material may have 1 to 50 parts by weight per 100 parts by weight of solid electrolyte. If the conductive material is less than 1 part by weight per 100 parts by weight of solid electrolyte, the electrical conductivity of the positive active material layer (23) may be reduced. If the conductive material is more than 50 parts by weight per 100 parts by weight of solid electrolyte, the ratio of the conductive material is excessively high, so a coating layer covering the surface of the solid electrolyte may not be properly formed.

[0057] According to the embodiments, the positive active material layer (23) may further include at least one additive selected from the group consisting of a filler, a coating agent, a dispersant, and an ion-conducting aid, in addition to the positive active material, solid electrolyte, conductive material, and binder described above.

[0058] The solid electrolyte layer (40) is disposed between the positive electrode layer (20) and the negative electrode layer (30) and may include a sulfide-based solid electrolyte with excellent lithium ion conductivity characteristics. The solid electrolyte included in the solid electrolyte layer (40) may be the same as or different from any one of the materials that may be included in the solid electrolyte included in the aforementioned positive electrode active material layer (23).

[0059] The solid electrolyte layer (40) of one embodiment may include a sulfide-based solid electrolyte. The sulfide-based solid electrolyte may be manufactured by processing starting materials, such as Li2S or P2S5, by a melt quenching method or a mechanical milling method. Additionally, heat treatment may be performed after such processing. The solid electrolyte may be amorphous, crystalline, or a mixture thereof. Furthermore, the solid electrolyte may include sulfur (S), phosphorus (P), and lithium (Li) as at least constituent elements among the sulfide-based solid electrolyte materials described above, for example. For example, the solid electrolyte may be a material containing Li2S-P2S5. When using a sulfide-based solid electrolyte material containing Li2S-P2S5 to form the solid electrolyte, the molar ratio of Li2S and P2S5 is, for example, in the range of Li2S : P2S5 = 50 : 50 to 90 : 10.

[0060] Sulfide-based solid electrolytes are, for example, Li 7-x PS 6-x Cl x (0≤x≤2), Li 7-x PS 6-x Br x (0≤x≤2), and Li 7-x PS 6-x I xIt may be an argyrodite-type compound comprising one or more selected from (0≤x≤2). In particular, the sulfide-based solid electrolyte may be an argyrodite-type compound comprising one or more selected from Li6PS5Cl, Li6PS5Br, and Li6PS5I. The density of the argyrodite-type solid electrolyte may be 1.5 g / cc to 2.0 g / cc. By having a density of 1.5 g / cc or higher for the argyrodite-type solid electrolyte, the internal resistance of the all-solid-state battery is reduced, and defects such as penetration and short circuits of the solid electrolyte film due to lithium dendrite formation can be prevented. The elastic modulus of the solid electrolyte is, for example, 15 GPa to 35 GPa.

[0061] The solid electrolyte layer (40) may further include a binder. The binder in the solid electrolyte layer (40) is not limited to, for example, styrene butadiene rubber (SBR), polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, etc. The binder of the solid electrolyte layer (40) may be the same as or different from the binder included in the positive electrode active material layer (23) or the binder included in the negative electrode coating layer (33).

[0062] The negative electrode layer (30) may include a negative electrode current collector (31) and a negative electrode coating layer (33) on the negative electrode current collector (31). The negative electrode current collector (31) may provide a reference surface on which the negative electrode coating layer (33) is placed. The negative electrode current collector (31) may include, for example, a material that does not react with lithium, that is, does not form any alloys or compounds with lithium. For example, the negative electrode current collector (31) may include at least one metal selected from the group consisting of copper (Cu), stainless steel, titanium (Ti), iron (Fe), cobalt (Co), and nickel (Ni). The thickness of the negative electrode current collector (31) may be 1 μm to 20 μm, more specifically 5 μm to 15 μm, and more specifically 7 μm to 10 μm.

[0063] The negative current collector (31) may be composed of one of the metals described above, or may include an alloy of two or more metals or a coating material. The negative current collector (31) may, for example, have a plate-like or foil-like shape. Meanwhile, in one embodiment, the negative current collector (31) may be omitted.

[0064] The negative electrode coating layer (33) can allow lithium metal to grow between the all-solid-state battery cell (10) and the negative electrode current collector (31) during charging. The negative electrode coating layer (33) can serve as a protective layer for the lithium metal and simultaneously suppress the precipitation and growth of lithium dendrites.

[0065] The cathode coating layer (33) may include metal and carbon. For example, the cathode coating layer (33) may include at least one metal selected from the group consisting of gold (Au), platinum (Pt), palladium (Pd), silicon (Si), silver (Ag), aluminum (Al), bismuth (Bi), tin (Sn), and zinc (Zn). The cathode coating layer (33) may include at least one carbon selected from the group consisting of carbon black, acetylene black, furnace black, ketjen black, and graphene. In one embodiment, the cathode coating layer (33) may include a mixture of carbon black and silver (Ag).

[0066] The cathode coating layer (33) may further include other additives in addition to metal and carbon. The cathode coating layer (33) may further include at least one additive selected from the group consisting of, for example, binders, fillers, coating agents, dispersants, and ion-conducting aids.

[0067] The negative electrode coating layer (33) may have a smaller thickness compared to the positive electrode active material layer (23). The thickness of the negative electrode coating layer (33) may be, for example, 50% or less, 40% or less, 30% or less, 20% or less, 10% or less, or 5% or less of the thickness of the positive electrode active material layer (23). The thickness of the negative electrode coating layer (33) may be, for example, 1 µm to 20 µm, 2 µm to 10 µm, or 3 µm to 7 µm. If the thickness of the negative electrode coating layer (33) is excessively thin, lithium dendrites formed between the negative electrode coating layer (33) and the negative electrode current collector (31) may cause the negative electrode coating layer (33) to collapse, thereby degrading the cycle characteristics of the all-solid-state battery cell (10). If the thickness of the negative electrode coating layer (33) increases excessively, the energy density of the all-solid-state battery cell (10) decreases, and the internal resistance of the all-solid-state battery cell (10) due to the negative electrode coating layer (33) increases, which may degrade the cycle characteristics of the all-solid-state battery cell (10).

[0068] Meanwhile, although not shown, a carbon layer may be further included to improve adhesion between the cathode coating layer (33) and the solid electrolyte layer (40).

[0069]

[0070] FIGS. 1b to 2 disclose a pressurizing unit (PU) applied to a wet isotropic pressurization process.

[0071] A pressurizing unit (PU) according to an embodiment of the present invention may include a die plate (DP), a cavity structure (CA), and a protective pouch (PC).

[0072] Here, the die plate (DP) and the cavity structure (CA) can be combined to form a jig (JG).

[0073] The die plate (DP) may be in the shape of a flat plate. In an embodiment of the present invention, the die plate (DP) may be in the shape of a rectangular plate, but is not necessarily limited thereto.

[0074] The die plate (DP) can serve as a substrate for supporting the all-solid-state battery cell (10). The die plate (DP) can be configured to stably support the all-solid-state battery cell (10) even under high pressure. The die plate (DP) may include a metal having sufficient rigidity to prevent bending and warping of the all-solid-state battery cell (10) when a pressurization process is performed on the all-solid-state battery cell (10). For example, the die plate (DP) may include a hard metal such as SUS (Steel Use Stainless).

[0075] The die plate (DP) may include a landing portion (LD). The landing portion (LD) may have a shape that protrudes in the vertical direction (D3) on the die plate (DP). In other words, the landing portion (LD) may protrude further outward than the die plate (DP).

[0076] A landing portion (LD) can accommodate an all-solid-state battery cell (10). From a planar perspective, the landing portion (LD) may have a shape that overlaps vertically with the all-solid-state battery cell (10). A release film may be coated on the landing portion (LD) so that the all-solid-state battery cell (10) can be easily separated.

[0077] Multiple landing sections (LD) can be arranged along the longitudinal direction (D1) on the die plate (DP).

[0078] Additionally, the landing portion (LD) may be positioned on the upper and lower parts of the die plate (DP), respectively. Alternatively, the landing portion (LD) may be positioned only on the upper part of the die plate (DP).

[0079] The number of landing portions (LD) and whether they are arranged vertically can be determined according to the design specifications. A release film may be coated on the landing portions (LD) so that the all-solid-state battery cell (10) can be easily separated.

[0080]

[0081] A cavity structure (CA) may be disposed on the upper and lower portions of the die plate (DP). The cavity structure (CA) may include a cavity (CA1) penetrating its center. The location of the cavity (CA1) and the location of the landing portion (LD) may overlap with respect to the vertical direction (D3).

[0082] The cavity structure (CA) may have a rectangular plate shape. A cavity (CA1) may be formed in the central part of the cavity structure (CA), and the cavity (CA1) may have a shape that is perforated in the vertical direction (D3).

[0083] The cavity structure (CA) can be seated on the die plate (DP). And the landing portion (LD) can be exposed through the cavity (CA1). The cavity (CA1) can provide a space for accommodating an all-solid-state battery cell (10) on the landing portion (LD).

[0084] The cavity structure (CA) may be composed of an elastic material. The elastic material may include at least one selected from the group consisting of urethane rubber, nitrile rubber, butyl rubber, fluororubber, chloroprene rubber, ethylene rubber, and silicone rubber. However, this is merely an example and it may be composed of other materials.

[0085] Referring to FIG. 1c, when the die plate (DP), cavity structure (CA), and all-solid-state battery cell (10) are combined, the upper surface of the all-solid-state battery cell (10) and the upper surface of the cavity structure (CA) can be located on the same plane.

[0086]

[0087] Referring to Figs. 1d and 1e, the protective pouch (PC) may be a thin film.

[0088] The protective pouch (PC) can cover the upper and lower parts of the jig (JG), and the remaining sides, excluding the opening (PCO), can be joined. The inner surface of the protective pouch (PC) can be coated with a release film so that it can be easily separated from the jig (JG) and the all-solid-state battery cell (10).

[0089] During vacuum treatment, gas present inside the protective pouch (PC) can be discharged through the opening (PCO).

[0090] The protective pouch (130) may be made of materials such as PET-nylon-AL-PP, PET-nylon, etc. However, it is not necessarily limited to these, and the material of the protective pouch (130) may be composed of various materials depending on the purpose and function.

[0091] The protective pouch (PC) may have a larger size than the die plate (DP) and the cavity structure (CA). The protective pouch (PC) may enclose the die plate (DP) and the cavity structure (CA).

[0092] Referring to Fig. 2, a pressurizing unit (PU) can be formed by wrapping a jig (JG) with a protective pouch (PC).

[0093] At this time, the opening (PCO) of the protective pouch (PC) may be in an open state, and a heating area (HA) including the opening (PCO) may be formed on one side of the protective pouch (PC). The heating area (HA) may be an area that seals the protective pouch (PC) by being joined by a heat fusion method.

[0094] The manufacturing apparatus for an all-solid-state battery according to an embodiment of the present invention described below may be a device for removing the wrinkled region (M) disclosed in FIG. 2 and sealing a protective pouch (PC).

[0095]

[0096] Referring to FIG. 7, a manufacturing apparatus (100) for an all-solid-state battery according to an embodiment of the present invention may include an upper frame (210), an upper column (211), a post (213), a lower frame (230), a base (235), a chamber block (215), a lifting unit (220), a sealing unit (240), a heating unit (260), a vacuum composition unit (280), and a wrinkle prevention unit (300).

[0097] Referring to FIGS. 3 and 4, the upper frame (210) may be placed on the upper part of the lower frame (230). In an embodiment of the present invention, the upper frame (210) may have a square block shape, but is not necessarily limited thereto.

[0098] At each corner of the upper frame (210), an upper column (211) may be arranged in the vertical direction (D3). The lower part of the upper column (211) may be connected to the upper part of the lower frame (230) and may support the upper frame (210).

[0099] The post (213) can be placed between the upper frame (210) and the lower frame (230). A post hole (215a) can be formed on the lower frame (230). The lower part of the post (213) can be inserted into and placed in the post hole (215a).

[0100] Referring to FIGS. 6 and 7, the lower frame (230) may be positioned at the bottom of the upper frame (210). In an embodiment of the present invention, the lower frame (230) may be a square block shape corresponding to the shape of the upper frame (210), but is not necessarily limited thereto.

[0101] A lower chamber groove (233) may be formed in the upper portion of the lower frame (230). The lower chamber groove (233) may be formed by being recessed inwardly toward the lower frame (230). In an embodiment of the present invention, the lower chamber groove (233) may be a square-shaped groove, but is not necessarily limited thereto.

[0102] A plurality of post grooves (231) may be formed in the periphery of the lower chamber groove (233) at the upper part of the lower frame (230). The lower part of a plurality of posts (213) may be inserted into and fixed in each of the plurality of post grooves (231).

[0103]

[0104] A base (235) may be positioned to protrude upward in the lower chamber groove (233). A pressurizing unit (PU) may be seated on the base (235). Referring to FIG. 2, in an embodiment of the present invention, the pressurizing unit (PU) may have a rectangular shape. Accordingly, in an embodiment of the present invention, the base (235) may be a rectangular block extended in a first direction (D1). The size of the first direction (D1) and the second direction (D2) of the base (235) may be formed larger than the size of the first direction (D1) and the second direction (D2) of the jig (JG) so as to sufficiently support the jig (JG) of the pressurizing unit (PU).

[0105] The base (235) may further include a base groove (235a).

[0106] The support groove (235a) may be formed by being recessed inwardly at the upper part of the support (235). The support groove (235a) may also be positioned in the second direction (D2).

[0107] The support groove (235a) may include a plurality of support grooves (235a).

[0108] Multiple support grooves (235a) can be arranged at predetermined intervals along the first direction (D1) of the support (235).

[0109] Referring to FIGS. 2 and FIGS. 6, as described above, a plurality of all-solid-state battery cells (10) can be arranged at a predetermined interval (G5) along a first direction (D1) on a jig (JG) of a pressurizing unit (PU).

[0110] When the pressurizing unit (PU) is placed on the base (235), a plurality of all-solid-state battery cells can be placed between a plurality of base grooves (235a).

[0111] The width (V2) of the support groove (235a) can be formed to be smaller than the gap (G5) between adjacent solid-state cells among the plurality of solid-state cells (10).

[0112] Additionally, the gap (V1) formed by adjacent support grooves (235a) among the plurality of support grooves (235a) can be formed so that the width (G4) of the all-solid-state battery cell placed on the jig (JG) is larger.

[0113] Multiple solid-state battery cells (10) can be placed on the flat surface of the base (235). The base (235) can have the effect of pressing the protective pouch (PC). In particular, it can press the part corresponding to the solid-state battery cells (10). Accordingly, wrinkles may not occur on the part corresponding to the solid-state battery cells (10) on the protective pouch (PC).

[0114] Also, referring to FIG. 7, the base (235) can protrude upward on the lower chamber groove (233). Specifically, a first height difference (H1) can be formed between the upper part of the base (235) and the upper part of the lower frame (230). A second height difference (H2) can be formed between the lower part of the base groove (235a) and the upper part of the lower frame (230).

[0115] When the chamber block (215) is seated on the lower frame (230), the upper part of the base (235) can be inserted further into the inner side of the upper chamber groove (216) by a first height difference (H1).

[0116] A gripper arm (RUG) of a transfer unit (RU) can be inserted into the support groove (235a) in a second direction (D2). As the lower part of the support groove (235a) forms a second height difference (H2) with the upper part of the lower frame (230), the gripper arm (RUG) can be inserted into the support groove (235a) along the second direction (D2) without interfering with the lower frame (230).

[0117] Here, based on the vertical direction (D3), the lower portion of the support groove (235a) may be formed at a position higher than the lower sealing (243). Alternatively, at least the lower portion of the support groove (235a) may be formed at the same height as the lower sealing (243).

[0118] In other words, the second height difference (H2) may have the same height value as the lower sealing (243) or a higher height value.

[0119] The gripper arm (RUG) can enter the support groove (235a) at a position higher than the lower sealing (243). The lower sealing (243) may not interfere with the movement of the gripper arm (RUG).

[0120]

[0121] Referring to FIG. 9d, the gripper arm (RUG) described below may include an upper gripper arm (RUG1) and a lower gripper arm (RUG2). When the gripper arm (RUG) moves in the second direction (D2), the lower gripper arm (RUG2) can be inserted into the support groove (235a).

[0122]

[0123] Referring to FIG. 3, a transfer unit (RU) according to an embodiment of the present invention may include a gripper arm (RUG) and a gripper body part (RUB).

[0124] Although the gripper body (RUB) is not shown in the drawing, it may be connected to a separate moving device. The control unit (CT) can control the moving device, and the moving device can move the gripper body (RUB) in a second direction (D2) and a third direction (D3). The moving device may be implemented with various drive structures.

[0125] The gripper arm (RUG) may be in the shape of a long bar extended in the second direction (D2). The gripper arm (RUG) can grip and secure the pressure unit (PU). Referring to FIG. 9d, in an embodiment of the present invention, the gripper arm (RUG) may include an upper gripper arm (RUG1) and a lower gripper arm (RUG2) along the vertical direction (D3). The upper gripper arm (RUG1) may be connected to the upper part of the gripper body (RUB). The lower gripper arm (RUG2) may be spaced apart from the upper gripper arm (RUG1) and connected to the lower part of the gripper body (RUB). The pressure unit (PU) may be inserted between the upper gripper arm (RUG1) and the lower gripper arm (RUG2).

[0126] In one configuration, the upper gripper arm (RUG1) and the lower gripper arm (RUG2) can be fixed in an upper and lower position to the gripper body (RUB). In this structure, the upper gripper arm (RUG1) and the lower gripper arm (RUG2) can be located at the upper and lower parts of the pressurizing unit (PU). The lower gripper arm (RUG2) can support the lower part of the pressurizing unit (PU).

[0127] Although not illustrated in the drawing, a lifting device may be placed on the gripper body (RUB) in a different form, and the lifting device may be connected to the upper gripper arm (RUG1) and the lower gripper arm (RUG2). The lifting device can move the upper gripper arm (RUG1) and the lower gripper arm (RUG2) in the up-and-down direction (D3) on the gripper body (RUB). In this structure, the upper gripper arm (RUG1) and the lower gripper arm (RUG2) can grip and fix the upper and lower parts of the pressurizing unit (PU).

[0128] The gripper arm (RUG) can grip between multiple solid-state battery cells on the jig (JG) of the pressurizing unit (PU). This is to prevent damage to the solid-state battery cells when the gripper arm (RUG) grips the jig (JG).

[0129] The moving device can raise the gripper body (RUB) upward and move it toward the chamber block (215) and the lower frame (230). At this time, the gripper arm (RUG) can be inserted into the support groove (235a), and the pressurizing unit (PU) can be seated on the support (235).

[0130] Subsequently, the moving device moves the gripper body (RUB) in the opposite direction to the chamber block (215) and the lower frame (230), so that the gripper arm (RUG) can be removed from the support groove (235a). Only the pressurizing unit (PU) can be seated on the support (235).

[0131]

[0132] Referring to FIGS. 5a, 7 and 8, the chamber block (215) can be placed between the lower frame (230) and the upper frame (210). The chamber block (215) can be connected to a post (213).

[0133] In the chamber block (215), a post hole (215a) that penetrates the chamber block (215) in the vertical direction may be formed. A post (213) may be inserted into the post hole (215a). Accordingly, the chamber block (215) may move in the vertical direction (D3) along the post (213).

[0134] An upper chamber groove (216) may be formed at the lower end of the chamber block (215). The upper chamber groove (216) may be formed by being recessed inwardly toward the chamber block (215). The upper chamber groove (216) may have a shape and size corresponding to the lower chamber groove (233). Accordingly, in an embodiment of the present invention, the upper chamber groove (216) may be a square-shaped groove, but is not necessarily limited thereto.

[0135] When the chamber block (215) is lowered and the chamber block (215) and the lower frame (230) are joined together, the upper chamber groove (216) and the lower chamber groove (233) come into contact with each other and can form a vacuum space (VAC; see FIG. 8).

[0136]

[0137] Referring to FIG. 7, the lifting unit (220) can be placed on the upper frame (210) and connected to the chamber block (215). When the control unit (CT) operates the lifting unit (220), the lifting unit (220) can move the chamber block (215) toward the lower frame (230).

[0138] The lifting unit (220) may include a hydraulic cylinder (221), a rod (222), and a hinge part (223).

[0139] A hydraulic cylinder (221) may be placed on an upper frame (210). The hydraulic cylinder (221) may include a rod (222).

[0140] The rod (222) can be positioned to penetrate the upper frame (210). When the hydraulic cylinder (221) is operated, the rod (222) can move up and down along the vertical direction (D3).

[0141] The hinge portion (223) can connect the lower portion of the rod (222) and the upper portion of the chamber block (215). The hinge portion (223) may include a rod bracket (223a), a block bracket (223b), and a hinge pin (223c).

[0142] The rod bracket (223a) can be placed at the lower end of the rod (222), and a through hole into which a hinge pin (223c) is inserted can be formed.

[0143] The block bracket (223b) can be placed on the upper part of the chamber block (215), and a through hole into which a hinge pin (223c) is inserted can be formed.

[0144] The hinge pin (223c) is inserted into the through hole of the rod bracket (223a) and the through hole of the block bracket (223b), and can connect the rod bracket (223a) and the block bracket (223b). Accordingly, when the rod (222) is raised, the chamber block (215) can be raised along the vertical direction (D3).

[0145] The hinge pin (223c) can absorb shocks or vibrations applied to the rod (222) and the chamber block (215).

[0146] Specifically, when the chamber block (215) descends and comes into contact with the upper part of the lower frame (230), the impact force generated at the time of contact can be mainly transmitted to the chamber block (215). Since the lower frame (230) is fixed to the process equipment, the impact force transmitted in the direction of the lower frame (230) may be relatively weak, and most of the impact force can be transmitted to the chamber block (215).

[0147] If the lower part of the rod (222) and the upper part of the chamber block (215) are directly connected, the impact force transmitted to the chamber block (215) can be transmitted directly to the rod (222). In this case, the impact force is transmitted to the hydraulic cylinder (221) through the rod (222), which may cause damage to the hydraulic cylinder (221) or reduce its lifespan.

[0148] As in the embodiment of the present invention, in a structure in which a hinge portion (223) is disposed between a rod (222) and a chamber block (215), a significant impact force can be absorbed at the connection portion of the hinge portion (223), thereby weakening the impact or vibration transmitted from the chamber block (215) to the rod (222). This can be advantageous for preventing damage to the hydraulic cylinder (221) and extending its lifespan.

[0149] Additionally, the hinge portion (223) can facilitate disassembly and assembly between the rod (222) and the chamber block (215). The operator can easily disassemble and assemble the rod (222) and the chamber block (215) through a simple operation of separating or joining the hinge pin (223c). This can facilitate maintenance of the rod (222) and the chamber block (215).

[0150]

[0151] Referring to FIGS. 5a, 6 and 7, the heating unit (260) can be placed in the lower chamber groove (233) and the upper chamber groove (216) and can heat-seal the heating area (HA) of the pressurizing unit (PU). The heating area (HA) may include an opening (PCO) of the protective pouch (PC). When the heating unit (260) heats and bonds the heating area (HA), the opening (PCO) can be sealed.

[0152] The heating unit (260) may include an upper protruding beam (261), an upper heating bar (262), a lower protruding beam (263), and a lower heating bar (264).

[0153] The upper protruding beam (261) may be positioned to protrude downward from the upper chamber groove (216). In an embodiment of the present invention, the upper protruding beam (261) may be in the shape of a rectangular parallelepiped beam extended in the second direction (D2).

[0154] The upper heating bar (262) may be extended and arranged along the second direction (D2) at the lower end of the upper protruding beam (261). In an embodiment of the present invention, the upper heating bar (262) may include a heating wire and may be heated through current control.

[0155] The lower protruding beam (263) may be positioned to protrude upward from the lower chamber groove (233). In an embodiment of the present invention, the lower protruding beam (263) may be in the shape of a rectangular parallelepiped beam extended in the second direction (D2).

[0156] The lower heating bar (264) may be extended and disposed along the second direction (D2) on the upper part of the lower protruding beam (263). In an embodiment of the present invention, the lower heating bar (264) may include a heating wire and may be heated through current control.

[0157] When the chamber block (215) is placed on the lower frame (230), the upper heating bar (262) and the lower heating bar (264) can each come into contact with the heating area (HA) of the protective pouch (PC). The upper heating bar (262) and the lower heating bar (264) can heat and bond the heating area (HA). Accordingly, the heating area (HA) can be heat-fused, and the opening (PCO) can be sealed.

[0158]

[0159] Referring to FIGS. 5a, 6 and 8, the sealing unit (240) can be positioned between the lower part of the chamber block (215) and the upper part of the lower frame (230). When the chamber block (215) is seated on the lower frame (230), the sealing unit (240) can seal the upper chamber groove (216) and the lower chamber groove (233).

[0160] The sealing unit (240) may include an upper sealing groove (241) and a lower seal (243).

[0161] The upper sealing groove (241) may be positioned along the perimeter of the upper chamber groove (216) at the lower end of the chamber block (215). The upper sealing groove (241) may be formed by being recessed inwardly toward the chamber block (215).

[0162] The lower seal (243) can be positioned along the perimeter of the lower chamber groove (233) at the upper end of the lower frame (230). When the chamber block (215) is seated on the lower frame (230), the lower seal (243) can be inserted into the upper sealing groove (241). As described above, the lower chamber groove (233) and the upper chamber groove (216) are combined to form a vacuum-forming space (VAC), and the vacuum-forming space (VAC) can be sealed from the outside by inserting the lower seal (243) into the upper sealing groove (241).

[0163]

[0164] Referring to FIGS. 4, 6 and 8, the vacuum composition unit (280) can discharge gas from the vacuum composition space (VAC; see FIG. 8) to the outside. The vacuum composition unit (280) may include a vacuum hole (281) and a vacuum pump unit (283).

[0165] A vacuum hole (281) may be formed on the side of the lower chamber groove (233). Referring to FIG. 4, the vacuum hole (281) may be connected to a vacuum pump unit (283) by a vacuum pipe (282). The vacuum pump unit (283) may suck in gas from the vacuum composition space (VAC) and discharge it to the outside. Here, the gas may include air.

[0166] When the control unit (CT) drives the vacuum pump unit (283), air is discharged to the outside through the vacuum hole (281), and the vacuum creation space (VAC) can be created in a vacuum state.

[0167] Accordingly, the gas present inside the protective pouch (PC) can be discharged into the vacuum-forming space (VAC) through the opening (PCO) and can be discharged to the outside through the vacuum hole (281).

[0168]

[0169] Referring to FIG. 5a, the wrinkle prevention part (300) can be placed in the upper chamber groove (216). The wrinkle prevention part (300) can press the upper part of the pressurizing unit (PU) to prevent wrinkles from forming on the pressurizing unit (PU).

[0170] The anti-wrinkle part (300) may include a pressing pad (310) and a cushion part (320).

[0171] When the chamber block is seated on the lower frame (230), the pressing pad (310) can press the upper part of the pressing unit (PU). The pressing pad (310) may be in the shape of a flat plate and may be in a shape corresponding to the shape of the pressing unit (PU). In an embodiment of the present invention, the pressing unit (PU) may be in the shape of a rectangular plate extended in the longitudinal direction (D1). Accordingly, the pressing pad (310) may be in the shape of a rectangular plate extended in the longitudinal direction (D1) corresponding to the shape of the pressing unit (PU).

[0172] A rectangular pressing pad (310) can be formed with a first length (T1) along a first direction (D1). And the pressing pad (310) can be formed with a second length (T2) along a second direction (D2).

[0173] Referring to FIG. 2, the jig (JG) of the pressurizing unit (PU) can be formed with a first spacing (G1) along a first direction (D1). The jig (JG) can also be formed with a second spacing (G2) along a second direction (D2).

[0174] Here, the first length (T1) of the pressing pad (310) can be formed to be larger than the first gap (G1) of the jig (JG). And the second length (T2) of the pressing pad (310) can be formed to be larger than the second gap (G2) of the jig (JG).

[0175] That is, the pressing pad (310) can be formed larger than the jig (JG). The pressing pad (310) can press the entire jig (JG). Referring to FIG. 2, the wrinkle area (M) where wrinkles can be formed on the protective pouch (PC) may be a position corresponding to the jig (JG).

[0176] The first length (T1) of the pressing pad (310) may be formed smaller than the first gap (G1) of the jig (JG) as needed. Additionally, the second length (T2) of the pressing pad (310) may be formed smaller than the second gap (G2) of the jig (JG) as needed.

[0177] However, even in this case, the first length (T1) and the second length (T2) of the pressing pad (310) can be formed to a size that can press all of the all-solid-state battery cells (10) placed on the jig (JG).

[0178]

[0179] As described above, a plurality of all-solid-state battery cells (10) may be arranged on the jig (JG). If wrinkles occur at the locations where the plurality of all-solid-state battery cells (10) are arranged, the all-solid-state battery cells (10) may not be uniformly pressurized during the isotropic pressurization process.

[0180] Therefore, wrinkles must not be formed on the jig (JG). The pressing pad (310) can be formed with a size larger than the jig (JG), and the pressing pad (310) can press the entire jig (JG) to prevent wrinkles from being formed on the jig (JG).

[0181]

[0182] Additionally, the first length (T1) of the pressing pad (310) may be formed to be smaller than the third gap (G3) of the protective pouch (PC). The protective pouch (PC) may form the third gap (G3) along the first direction (D1). In other words, the third gap (G3) may be the total length based on the first direction (D1) of the protective pouch (PC).

[0183] The pressing pad (310) can press the upper part of the pressurizing unit (PU), excluding the heating area (HA). In other words, the first length (T1) of the pressing pad (310) is formed to be larger than the second gap (G2) and smaller than the third gap (G3), but can be formed to be a length that does not include the heating area (HA).

[0184] As described above, when the chamber block (215) is placed on the lower frame (230), the heating area (HA) is in contact with the heating unit (260), so the pressing pad (310) must be spaced apart from the heating area (HA).

[0185] Referring to FIG. 7, the upper heating bar (262) can form a first spacing (L1) along the first direction (D1) from the side of the pressing pad (310). And the lower heating bar (264) can form a second spacing (L2) along the first direction (D1) from the side of the base (235).

[0186] As described above, since the upper heating bar (262) and the lower heating bar (264) can be positioned on the same line along the vertical direction (D3), when the side of the pressing pad (310) and the side of the base (235) are positioned on the same line along the vertical direction (D3), the first spacing (L1) and the second spacing (L2) can have the same spacing value.

[0187]

[0188] Meanwhile, referring to FIG. 5b, the anti-wrinkle part (300) may further include a cushioning sheet (313).

[0189] The cushioning sheet (313) may be placed below the pressing pad (310). The cushioning sheet (313) may be made of an elastic material such as rubber. At this time, the pressing pad (310) may be made of a relatively hard material such as metal or plastic.

[0190] When the pressing pad (310) presses the protective pouch (PC) of the pressurizing unit (PU), the cushioning sheet (313) can come into contact with and press the surface of the protective pouch (PC). Since the cushioning sheet (313) can be made of an elastic material, the cushioning sheet (313) can gently press the surface of the protective pouch (PC) to prevent damage to the surface of the protective pouch (PC).

[0191]

[0192] Referring to FIG. 5a, the cushion portion (320) can be placed between the upper chamber groove (216) and the pressing pad (310).

[0193] When the pressing pad (310) presses the pressure unit (PU), the cushion portion (320) is stretched and can relieve the excessive pressing of the pressing pad (310) against the pressure unit (PU).

[0194] The cushion portion (320) may include an upper spring groove (322), a lower spring groove (323), and a spring (321).

[0195] The upper spring groove (322) can be formed by being recessed inwardly into the upper chamber groove (216).

[0196] The lower spring groove (323) can be formed by being recessed inwardly into the upper part of the pressing pad (310).

[0197] Both ends of the spring (321) can be inserted into and connected to the upper spring groove (322) and the lower spring groove (323).

[0198] When the pressing pad (310) presses the pressure unit (PU), the spring (321) is retracted, preventing the pressing pad (310) from pressing the pressure unit (PU) excessively.

[0199] The above-described wrinkle prevention part (300) can prevent wrinkles from forming by pressing the surface of the protective pouch (PC) with appropriate force through the structure described above. This can help gas escape quickly from inside the protective pouch (PC) during vacuum processing.

[0200]

[0201] The configuration of the manufacturing apparatus (100) of the all-solid-state battery of the present invention is as described above, and below, a method for manufacturing an all-solid-state battery will be described.

[0202] Referring to FIG. 10, the method may include placing a pressurizing unit (PU) on a base (235) (S1), forming a vacuum space (VAC) and pressing the pressurizing unit (PU) (S2), removing gas from the vacuum space (VAC) and vacuuming the inside of the pressurizing unit (PU) (S3), and sealing the pressurizing unit (PU) (S4).

[0203] Placing the pressurizing unit (PU) on the above-mentioned base (235) (S1) allows the pressurizing unit (PU) to move in a first direction (D1) along the conveyor device (CV), as shown in FIG. 9a. The control unit (CT) can temporarily stop the operation of the conveyor device (CV). The control unit (CT) can operate the moving device to move the gripper body (RUB) in a second direction (D2). Accordingly, the gripper arm (RUG) can grasp the pressurizing unit (PU).

[0204] The gripper arm (RUG) may include an upper gripper arm connected to the upper part of the gripper body (RUB) and a lower gripper arm (RUG2) connected to the lower part of the gripper body (RUB).

[0205] Referring to FIG. 9d, a conveyor groove (CVG) into which the lower gripper arm (RUG2) is inserted may be formed on the conveyor device (CV). The lower gripper arm (RUG2) is inserted into the conveyor groove (CVG) and can support the lower part of the pressurizing unit (PU). At this time, the upper gripper arm (RUG1) may be positioned on the upper part of the pressurizing unit (PU).

[0206] The gripper arm (RUG) can grip between multiple all-solid-state battery cells on the jig (JG) of the pressurizing unit (PU).

[0207] Referring to FIG. 9b, the moving device can raise the gripper arm (RUG). The moving device can raise the gripper arm (RUG) to a height corresponding to the support groove (235a).

[0208] Referring to FIG. 9c, the moving device can move the gripper arm (RUG) toward the base (235). At this time, the gripper arm (RUG) can be inserted into the base groove (235a), and the pressurizing unit (PU) can be located on the upper part of the base (235).

[0209] Although not illustrated in the drawing, the moving device can move the gripper arm (RUG) slightly downward so that the pressure unit (PU) is seated on the upper part of the base (235).

[0210] Referring to FIG. 9d, the moving device can move the gripper body (RUB) in the opposite direction of the base (235). The gripper arm (RUG) is disengaged from the base groove (235a), and the pressurizing unit (PU) may remain on the base (235).

[0211] As disclosed in FIG. 7, a pressure unit (PU) can be seated on the base (235).

[0212]

[0213] Forming the vacuum space (VAC) and pressing the pressurizing unit (PU) (S2) can be achieved by the control unit (CT) operating the hydraulic cylinder (221) to lower the chamber block (215), as shown in FIG. 9d. The chamber block (215) is seated on the lower frame (230), and the upper chamber groove (216) and the lower chamber groove (233) are joined together to form the vacuum space (VAC).

[0214] At this time, the lower sealing (243) is inserted into the upper sealing groove (241) and can seal the vacuum formation space (VAC).

[0215] Referring to FIG. 8, when the chamber block (215) is seated on the lower frame (230), the pressing pad (310) can press the protective pouch (PC) of the pressurizing unit (PU). The cushion part (320) is elastic and can prevent the pressing pad (310) from pressing the pressurizing unit (PU) with excessive force.

[0216]

[0217] Removing the gas from the vacuum-forming space (VAC) and vacuuming the interior of the pressurizing unit (PU) (S3) can be achieved by the control unit (CT) operating the vacuum pump unit (283). The vacuum pump unit (283) can discharge the gas from the vacuum-forming space (VAC) to the outside through the vacuum hole (281). At this time, the gas may contain air.

[0218] As gas is discharged from the vacuum-forming space (VAC), gas present inside the protective pouch (PC) can also be discharged. The gas can be discharged into the vacuum-forming space through the opening (PCO) of the protective pouch (PC).

[0219] As described above, since the pressing pad (310) presses the protective pouch (PC), it is possible to prevent wrinkles from forming on the protective pouch (PC) during the process of gas discharge.

[0220]

[0221] Sealing the above-mentioned pressurized unit (PU) (S4) can be achieved by the upper heating bar (262) and the lower heating bar (264) heating the heating area (HA) of the protective pouch (PC) to heat-seal it, as shown in FIG. 8. As the heating area (HA) heat-seals, the opening (PCO) can be joined. Accordingly, the interior of the protective pouch (PC) can be vacuum-sealed.

[0222] The method for manufacturing an all-solid-state battery according to an embodiment of the present invention can prevent wrinkles from forming on the surface of the protective pouch (PC) during the process of vacuuming the interior of the protective pouch (PC) through the above-described manufacturing method. In other words, the surface of the protective pouch (PC) can be made flat so that it adheres closely to the surface of the all-solid-state battery unit cell. This can increase the isotropic pressure of the all-solid-state battery unit cell and is expected to have the effect of improving the density of the all-solid-state battery unit cell.

[0223] Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto and can be implemented with various modifications within the scope of the claims, the detailed description of the invention, and the attached drawings, and it is obvious that such modifications also fall within the scope of the present invention.

Claims

1. A lower frame having a lower chamber groove formed in the upper portion, wherein the lower chamber groove is formed by being recessed inwardly toward the lower frame; A support protruding upwardly from the lower chamber groove, and a pressure unit is seated on the support; An upper frame positioned on the upper part of the lower frame; A chamber block disposed between the lower frame and the upper frame, wherein an upper chamber groove is formed at the lower end of the chamber block by being recessed inwardly toward the chamber block; A heating unit disposed in the lower chamber groove and the upper chamber groove and configured to heat-fuse the heating area (HA) of the pressurizing unit; and A wrinkle prevention member disposed in the upper chamber groove; comprising The above wrinkle prevention unit is configured to press the upper part of the above pressure unit to prevent wrinkles from forming on the above pressure unit. Manufacturing apparatus for all-solid-state batteries.

2. In Paragraph 1, The above wrinkle-prevention part is, A pressing pad that presses the upper part of the above-mentioned pressure unit; including, Manufacturing apparatus for all-solid-state batteries.

3. In Paragraph 2, The above-mentioned pressing pad is in the shape of a flat plate, and The above-mentioned pressing pad has a shape corresponding to the shape of the above-mentioned pressure unit, Manufacturing apparatus for all-solid-state batteries.

4. In Paragraph 3, The first length (T1) of the above-mentioned pressing pad is formed to be larger than the first gap (G1) of the jig included in the pressing unit, and The second length (T2) of the above-mentioned pressing pad is formed to be larger than the second gap (G2) of the above-mentioned jig, Manufacturing apparatus for all-solid-state batteries.

5. In Paragraph 4, The first length (T1) of the above-mentioned pressing pad is formed to be smaller than the third gap (G3) of the protective pouch included in the above-mentioned pressing unit, and The above-mentioned pressing pad is configured to press the upper part of the above-mentioned pressurizing unit, excluding the above-mentioned heating area (HA). Manufacturing apparatus for all-solid-state batteries.

6. In Paragraph 3, The above wrinkle-prevention part is, A cushioning sheet disposed below the above-mentioned pressing pad; Includes more, The above cushioning sheet is composed of an elastic material, Manufacturing apparatus for all-solid-state batteries.

7. In Paragraph 2, The above wrinkle-prevention part is, It further includes a cushion portion disposed between the upper chamber groove and the pressing pad, and When the above-mentioned pressing pad presses the above-mentioned pressure unit, the cushion portion is configured to expand and contract to mitigate the excessive pressing of the above-mentioned pressing pad against the above-mentioned pressure unit. Manufacturing apparatus for all-solid-state batteries.

8. In Paragraph 7, The above cushion part is, An upper spring groove formed by being recessed inwardly into the upper chamber groove; A lower spring groove formed by being recessed inwardly at the upper portion of the above-mentioned pressing pad; and A spring disposed in the upper spring groove and the lower spring groove; including, Manufacturing apparatus for all-solid-state batteries.

9. In Paragraph 5, A support groove formed by being recessed along the second direction (D2) at the upper part of the above support; Includes more, The above support groove includes a plurality of support grooves, and The plurality of support grooves are arranged at predetermined intervals along the first direction (D1) of the support. Manufacturing apparatus for all-solid-state batteries.

10. In Paragraph 9, In the above-mentioned pressurizing unit, a plurality of all-solid-state battery cells are arranged at a predetermined interval (G5), and When the above-mentioned pressure unit is placed on the above-mentioned base, A manufacturing apparatus for an all-solid-state battery, wherein the plurality of all-solid-state battery cells are seated between the plurality of support grooves.

11. In Paragraph 10, The gap (V1) formed by adjacent support grooves among the plurality of support grooves is formed to be larger than the width (G4) of the all-solid-state battery cell, and The width (V2) of the above support groove is formed to be smaller than the gap (G5) between adjacent all-solid-state battery cells among the plurality of all-solid-state battery cells, Manufacturing apparatus for all-solid-state batteries.

12. In Paragraph 10, The above support protrudes upward on the lower chamber groove, and A first height difference (H1) is formed between the upper part of the base and the upper part of the lower frame, and A second height difference (H2) is formed between the lower part of the base groove and the upper part of the lower frame. Manufacturing apparatus for all-solid-state batteries.

13. In Paragraph 5, The heating unit is, An upper protruding beam positioned to protrude downward from the upper chamber groove; An upper heating bar positioned at the lower end of the upper protruding beam; A lower protruding beam positioned to protrude upward from the lower chamber groove, wherein the lower protruding beam is positioned at a position corresponding to the upper protruding beam along the vertical direction (D3); and A lower heating bar positioned at the upper end of the lower protruding beam; including The upper heating bar and the lower heating bar are configured to heat and bond a protective pouch included in the pressurizing unit. Manufacturing apparatus for all-solid-state batteries.

14. In Paragraph 13, The upper heating bar is positioned spaced apart from the side of the pressing pad along the first direction (D1), and the upper heating bar is positioned extended in the second direction (D2). The lower heating bar is positioned spaced apart from the side of the base along the first direction (D1), and the lower heating bar is positioned extended in the second direction (D2). The above protective pouch includes an opening, The above opening is formed on the heating area (HA), and The upper heating bar and the lower heating bar are configured to heat the heating area (HA) to join the opening. Manufacturing apparatus for all-solid-state batteries.

15. In Paragraph 1, It further includes a lifting unit disposed on the upper frame and connected to the chamber block; wherein the lifting unit moves the chamber block toward the lower frame. The above lifting unit is, A hydraulic cylinder disposed on the upper frame, wherein the hydraulic cylinder includes a rod; and A hinge portion configured to connect the lower portion of the rod and the upper portion of the chamber block; comprising The above hinge part is, A rod bracket positioned at the lower end of the above rod; A block bracket disposed at the upper part of the chamber block; and A hinge pin connecting the above-mentioned rod bracket and the above-mentioned block bracket; comprising Manufacturing apparatus for all-solid-state batteries.

16. In Paragraph 1, It further includes a sealing unit configured to seal the upper chamber groove and the lower chamber groove; The above sealing unit is, An upper sealing groove disposed along the perimeter of the upper chamber groove at the lower end of the chamber block; and It includes a lower sealing disposed along the perimeter of the lower chamber groove at the upper part of the lower frame, and When the chamber block is seated on the lower frame, The above lower sealing is inserted into the above upper sealing groove, Manufacturing apparatus for all-solid-state batteries.

17. In Paragraph 1, The upper chamber groove and the lower chamber groove are combined to form a vacuum composition space, and It further includes a vacuum composition unit that discharges gas from the above vacuum composition space to the outside, and The above vacuum composition part is, A vacuum hole formed on the side of the lower chamber groove; and A vacuum pump unit connected by the above vacuum hole and vacuum piping; comprising Manufacturing apparatus for all-solid-state batteries.

18. Placing a pressure unit on a base; Forming a vacuum composition space and pressing the pressurizing unit; Removing gas from the above vacuum composition space and vacuuming the interior of the above pressurized unit; and Sealing the above-mentioned pressurization unit; including, Method for manufacturing an all-solid-state battery.

19. In Paragraph 18, The protective pouch of the above-mentioned pressurizing unit includes an opening, and Pressing the above-mentioned pressurizing unit is, A method comprising pressing the upper part of the pressurizing unit to allow gas present inside the pressurizing unit to be discharged through the opening. Method for manufacturing an all-solid-state battery.

20. In Paragraph 19, The above protective pouch includes a heating area, and the heating area includes the opening, Sealing the above-mentioned pressurization unit is, Sealing the pressurizing unit by heat-fusing the heating area, Method for manufacturing an all-solid-state battery.

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