All-solid-state battery and method for manufacturing all-solid-state battery

Abstract

The present invention relates to an all-solid-state battery and, more specifically, to an all-solid-state battery comprising: a can assembly in which an all-solid-state battery cell is accommodated; a cap assembly coupled to the can assembly; and a vacuum unit disposed in the cap assembly, wherein the cap assembly and the can assembly form a receiving space in which the all-solid-state battery cell is accommodated, the receiving space being sealed, and the vacuum unit includes a vacuum hole disposed in the cap assembly, wherein the vacuum hole may be in communication with the receiving space.

Description

All-solid-state battery and method for manufacturing an all-solid-state battery

[0001] The present invention relates to an all-solid-state battery and a method for manufacturing an all-solid-state battery, and more specifically, to an all-solid-state battery and a method for manufacturing an all-solid-state battery that provides a structure for a prismatic all-solid-state battery and facilitates the internal vacuum composition, maintenance, and repair of a case housing an all-solid-state battery cell.

[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] All-solid-state batteries can be manufactured in various forms depending on the customer's delivery requirements and design specifications. Among these, prismatic all-solid-state batteries are a form in which the battery is housed inside a rigid case.

[0005] Here, the solid electrolyte of an all-solid-state battery contains sulfide-based components that can generate hydrogen sulfide when reacting with moisture in the air. This can lead to the degradation of the battery. Therefore, it is important to maintain a vacuum inside the case to minimize this moisture reactivity.

[0006]

[0007] The problem that the present invention aims to solve is to provide an all-solid-state battery that facilitates the internal vacuum composition, maintenance, and repair of a case housing an all-solid-state battery cell.

[0008] Another problem that the present invention aims to solve is to provide a method for manufacturing an all-solid-state battery that facilitates the internal vacuum composition, maintenance, and repair of a case housing an all-solid-state battery cell.

[0009]

[0010] According to the concept of the present invention, an all-solid-state battery comprises: a can assembly in which an all-solid-state battery cell is accommodated; a cap assembly coupled to the can assembly; and a vacuum portion disposed in the cap assembly; wherein the cap assembly and the can assembly form a receiving space in which an all-solid-state battery cell is accommodated, and the receiving space is sealed, and the vacuum portion comprises a vacuum hole disposed in the cap assembly; and the vacuum hole may be in communication with the receiving space.

[0011] A method for manufacturing an all-solid-state battery according to another concept of the present invention may include: arranging an all-solid-state battery cell inside a can assembly; connecting an electrode tab portion of the all-solid-state battery cell to a tab plate; joining a cap assembly to the can assembly to form a case; forming a receiving space inside the case to accommodate the all-solid-state battery cell; creating a vacuum state in the receiving space; and sealing the receiving space.

[0012]

[0013] The all-solid-state battery and the method for manufacturing the all-solid-state battery according to the present invention can facilitate the internal vacuum composition of the prismatic all-solid-state battery.

[0014] In addition, the internal vacuum state of the prismatic all-solid-state battery can be adjusted by opening and closing as needed or during maintenance.

[0015] This allows for the minimization or prevention of the reaction between the solid electrolyte of an all-solid-state battery and moisture in the air. This prevents the degradation of the all-solid-state battery and reduces various fire risks, thereby increasing product reliability.

[0016]

[0017] FIG. 1 is a cross-sectional view of an all-solid-state battery cell (unit cell) according to embodiments of the present invention.

[0018] FIG. 2 is a cross-sectional view of an all-solid-state battery cell (bicell) according to embodiments of the present invention.

[0019] FIG. 3 is a drawing for explaining an all-solid-state battery cell (cell stack) according to embodiments of the present invention.

[0020] FIG. 4 is an assembly diagram illustrating an all-solid-state battery according to embodiments of the present invention.

[0021] FIG. 5a is a perspective view illustrating an all-solid-state battery according to embodiments of the present invention.

[0022] FIG. 5b is a front view illustrating an all-solid-state battery according to embodiments of the present invention.

[0023] FIG. 6a is a schematic cross-sectional view of the AA' portion disclosed in FIG. 5b.

[0024] FIG. 6b is an enlarged view of the dotted line portion disclosed in FIG. 6a.

[0025] FIG. 7a is a schematic cross-sectional view of the BB' portion disclosed in FIG. 5b.

[0026] FIG. 7b is an enlarged view of the dotted line portion disclosed in FIG. 7a.

[0027] FIG. 8 is a diagram illustrating the state of creating a vacuum by placing an all-solid-state battery according to embodiments of the present invention into a vacuum chamber.

[0028] FIG. 9 is a cross-sectional view illustrating a state in which a vacuum hole is welded and sealed according to embodiments of the present invention.

[0029] FIG. 10 is a cross-sectional view illustrating a state in which a welding pin is inserted into a vacuum hole and welded to seal it according to embodiments of the present invention.

[0030] FIGS. 11a and FIGS. 11b are front views illustrating a state of sealing a vacuum hole according to embodiments of the present invention as an embodiment of a control unit.

[0031] FIGS. 12a to 12c are drawings for explaining a door assembly according to embodiments of the present invention.

[0032] FIGS. 12d and FIGS. 12e are front views illustrating the state of opening and closing a vacuum hole with a door assembly according to embodiments of the present invention.

[0033] FIG. 12f is a drawing for explaining a form in which a door assembly according to embodiments of the present invention includes a grid structure.

[0034] FIG. 12g is a drawing for explaining the structure of a grid structure in the dotted line portion disclosed in FIG. 12f.

[0035] FIG. 13 is a process flowchart for explaining a method for manufacturing an all-solid-state battery according to embodiments of the present invention.

[0036]

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041]

[0042] FIG. 1 discloses a unit cell shape of an all-solid-state battery cell (10) according to embodiments of the present invention.

[0043] Referring to FIG. 1, 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, not limited thereto, 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).

[0044] 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.

[0045] 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.

[0046] Unlike as illustrated in FIG. 1, 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).

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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).

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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.

[0064] 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 active material layer (23) or the binder included in the coating layer (33).

[0065] The negative electrode layer (30) may include a negative electrode current collector (31) and a coating layer (33) on the negative electrode current collector (31). The negative electrode current collector (31) may provide a reference surface on which the 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.

[0066] 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.

[0067] The coating layer (33) can allow lithium metal to grow between the all-solid-state battery cell (10) and the negative current collector (31) during charging. The coating layer (33) can serve as a protective layer for the lithium metal and simultaneously suppress the precipitation and growth of lithium dendrites.

[0068] The coating layer (33) may include metal and carbon. For example, the 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 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 coating layer (33) may include a mixture of carbon black and silver (Ag).

[0069] The coating layer (33) may further include other additives in addition to metal and carbon. The 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.

[0070] The coating layer (33) may have a smaller thickness compared to the positive active material layer (23). The thickness of the 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 active material layer (23). The thickness of the 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 coating layer (33) is excessively thin, lithium dendrites formed between the coating layer (33) and the negative current collector (31) may cause the coating layer (33) to collapse, thereby degrading the cycle characteristics of the all-solid-state battery cell (10). If the thickness of the 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 coating layer (33) increases, which may degrade the cycle characteristics of the all-solid-state battery cell (10).

[0071] Meanwhile, although not shown, a carbon layer may be further included to improve adhesion between the coating layer (33) and the solid electrolyte layer (40).

[0072]

[0073] FIG. 2 discloses a bi-cell form of an all-solid-state battery cell (10) according to embodiments of the present invention.

[0074] The bicell may be in a form in which an anode layer (20), a solid electrolyte layer (40), a cathode layer (30), a solid electrolyte layer (40), and an anode layer (20) are sequentially stacked, as disclosed in FIG. 2. Alternatively, although not illustrated in the drawing, it may be in a form in which a cathode layer (30), a solid electrolyte layer (40), an anode layer (20), a solid electrolyte layer (40), and a cathode layer (30) are sequentially stacked.

[0075] In other words, a bi-cell can be defined as an all-solid-state battery cell (10) in which the electrodes at both ends are the same. And the bi-cell only needs to have the electrodes at both ends the same, and there may be no limit to the number of stacked electrode layers and solid electrolyte layers.

[0076] Half-cells can be laminated and stacked on the bicell. Here, a half-cell can be defined as a cell comprising one electrode layer and one solid electrolyte layer.

[0077] A plurality of half cells are stacked on a bicell to form a cell stack disclosed in FIG. 3.

[0078]

[0079] FIG. 3 discloses a cell stack form of an all-solid-state battery cell (10) according to embodiments of the present invention.

[0080] Referring to FIG. 3, the cell stack of the all-solid-state battery cell (10) can be configured by stacking a plurality of half cells on a bicell.

[0081] Electrode tab portions (TBA) may be disposed on both sides of the all-solid-state battery cell (10).

[0082] The electrode tab portion (TBA) may include a first electrode tab portion (TBA1) and a second electrode tab portion (TBA2).

[0083] When the first electrode tab portion (TBA1) is connected to the positive electrode layers (20), the second electrode tab portion (TBA2) can be connected to the negative electrode layers (30). In this case, the first electrode tab portion (TBA1) can be a positive electrode tab assembly, and the second electrode tab portion (TBA2) can be a negative electrode tab assembly. In other words, the first electrode tab portion (TBA1) can be in the form of a plurality of positive electrode tabs (TB1, TB2) connected to the positive electrode layers (20).

[0084] Conversely, when the first electrode tab portion (TBA1) is connected to the negative electrode layer (30), the second electrode tab portion (TBA2) can be connected to the positive electrode layer (20). In this case, the first electrode tab portion (TBA1) can be a negative electrode tab assembly, and the second electrode tab portion (TBA2) can be a positive electrode tab assembly. In other words, the first electrode tab portion (TBA1) can be in the form of a plurality of negative electrode tabs (TB1, TB2) connected to the negative electrode layers (30).

[0085] Meanwhile, in the embodiments of the present invention, a plurality of first electrode tab portions (TBA1) and second electrode tab portions (TBA2) may be arranged along the first direction (D1). In other words, a plurality of electrode tab portions (TBA1, TBA2) may be arranged along the width direction (D1) of the all-solid-state battery cell (10). FIG. 3 discloses a state in which a pair of first electrode tab portions (TBA11, TBA12) are arranged along the width direction (D1) of the all-solid-state battery cell (10).

[0086] Figure 3 illustrates two first electrode tab sections (TBA11, TBA12), but is not limited thereto, and the number may be changed according to design specifications, design purpose, etc.

[0087] A structure in which a plurality of electrode tab portions (TBA1, TBA2) are arranged along the first direction (D1) can improve electrical conductivity between the plurality of electrode tab portions (TBA1, TBA2) and the tab plate (130) because when the electrode tab portion (TBA) is welded to the tab plate (130), the welded portion becomes multiple.

[0088]

[0089] The first direction (D1), second direction (D2), and third direction (D3) described below may be defined as follows. The first direction (D1) may indicate the width direction or left-right direction of the prismatic all-solid-state battery (100), the second direction (D2) may indicate the length direction or front-back direction of the prismatic all-solid-state battery (100), and the third direction (D3) may indicate the up-down direction of the prismatic all-solid-state battery (100). In addition, various other types of directions may be defined as needed.

[0090]

[0091] FIGS. 4 to 6b disclose an all-solid-state battery (100) according to embodiments of the present invention.

[0092] The all-solid-state battery (100) disclosed in FIG. 4 may be in the form in which the all-solid-state battery cell (10) disclosed in FIG. 3 is embedded in a case (101). In other words, it may be in the form in which a prismatic all-solid-state battery (100) is manufactured by embedding an all-solid-state battery cell (10) in the form of a cell stack in a case (101).

[0093] Referring to FIGS. 4 to 6b, an all-solid-state battery (100) according to embodiments of the present invention may include a can assembly (110), a tab plate (130), a cap assembly (120), an elastic sheet (140), and a tab organizing area (200).

[0094] Referring to FIG. 4, the can assembly (110) may include a plurality of can bodies (111a, 111b). The plurality of can bodies (111a, 111b) are combined with each other and can accommodate an all-solid-state battery cell (10) inside.

[0095] Multiple can bodies (111a, 111b) can apply pressure to the upper and lower parts of the all-solid-state battery cell (10). In other words, the upper can body (111a) positioned at the top and the lower can body (111b) positioned at the bottom are combined with each other with respect to the third direction (D3) to apply surface pressure to the all-solid-state battery cell (10).

[0096] The all-solid-state battery cell (10) can assemble the can assembly (110) while applying a certain pressure to reduce the interfacial resistance of the solid electrolyte layer (40). At this time, an elastic sheet (140), which will be described later, can be placed between the can assembly (110) and the all-solid-state battery cell (10) to maintain a certain pressure.

[0097] The upper can body (111a) and the lower can body (111b) can be joined together by welding the joint (111c). The position of the joint (111c) is not limited to the position disclosed in FIG. 4 and can be changed according to the shape of the upper can body (111a) and the shape of the lower can body (111b).

[0098] When manufacturing a can assembly (110), an all-solid-state battery cell (10) can be placed on a lower can body (111b). The all-solid-state battery cell (10) can be pressed with an upper can body (111a), and the upper can body (111a) and the lower can body (111b) can be aligned with the joint (111c). Then, the joint (111c) can be welded.

[0099] In summary, while the all-solid-state battery cell (10) is being pressed by the upper can body (111a), the joint (111c) between the upper can body (111a) and the lower can body (111b) can be welded. By doing so, the can assembly (110) can maintain the state of pressing the all-solid-state battery cell (10).

[0100] Additionally, the can assembly (110) may include a plurality of ribs (112). The plurality of ribs (112) may be arranged on the front and rear portions of the can assembly (110).

[0101] The front and rear portions of the can assembly (110) can each be defined as the portions to which the cap assembly (120) is joined. Referring to FIG. 4, the front and rear portions of the can assembly (110) may be the open portions of the can assembly (110) with respect to the second direction (D2). Additionally, the front and rear portions of the can assembly (110) may be the portions where the electrode tab portion (TBA) of the all-solid-state battery cell (10) is exposed and the tab plate (130) is placed.

[0102] Multiple ribs (112) can guide the part where the cap assembly (120) is joined.

[0103] Multiple ribs (112) may include a center rib (112a) and a side rib (112b).

[0104] The center rib (112a) may be shaped to protrude in a second direction (D2) along the edge of the can body (111) from the front and rear portions of the can assembly (110). The side ribs (112b) may be arranged on both sides of the center rib (112a) along the first direction (D1) from the front and rear portions of the can assembly (110). The side ribs (112b) may be arranged spaced apart from the center rib (112a) at a predetermined distance. In an embodiment of the present invention, the side ribs (112b) may be shaped like a U along the edge of the can body (111). However, they are not limited thereto and may be changed according to the shape of the can body (111).

[0105] A tab organizing area (200) can be formed between multiple ribs (112). In other words, multiple ribs (112) can be arranged on the front and rear portions of a can assembly (110), and a tab organizing area (200) can be formed between the multiple ribs (112). Alternatively, a tab organizing area (200) can be formed by partially cutting a rib (112) that is integrally formed on the front and rear portions of a can assembly (110).

[0106]

[0107] Referring to FIGS. 6a and 6b, an elastic sheet (140) may be placed between a solid-state battery cell (10) and a can assembly (110). In an embodiment of the present invention, the elastic sheet (140) may be placed to wrap around the solid-state battery cell (10). The front and rear portions of the solid-state battery cell (10) have electrode tab portions (TBA). The elastic sheet (140) may wrap around the remaining portion of the solid-state battery cell (10), excluding the front and rear portions of the solid-state battery cell (10).

[0108] In other words, the elastic sheet (140) can be placed along the perimeter of the all-solid-state battery cell (10) that the can assembly (110) wraps around. The elastic sheet (140) can be stretched and can provide a space area in which the volume of the all-solid-state battery cell (10) can change during charging and discharging of the all-solid-state battery cell (10).

[0109] In an embodiment of the present invention, the elastic sheet (140) may include an insulating material. Since the can assembly (110) and the all-solid-state battery cell (10) are not in direct contact due to the elastic sheet (140), the can assembly (110) and the all-solid-state battery cell (10) may not conduct electricity. The material of the elastic sheet (140) may include one or more of urethane rubber, nitrile rubber, butyl rubber, fluororubber, chloroprene rubber, ethylene rubber, and silicone rubber, but is not limited thereto.

[0110] Although not illustrated in the drawing, the inner surface of the can body (111) may be coated with a heat-resistant insulating material separately from the elastic sheet (140). In this case, electrical conductivity between the all-solid-state battery cell (10) and the inner surface of the can body (111) can be more effectively blocked.

[0111]

[0112] Referring to FIGS. 4 and FIG. 6b, the tab plate (130) can be connected to the electrode tab portion (TBA) of the all-solid-state battery cell (10). In an embodiment of the present invention, the tab plate (130) and the electrode tab portion (TBA) can be welded. Laser welding may be applied as the welding process, but is not limited thereto. In addition, other connection methods capable of electrically energizing the tab plate (130) and the electrode tab portion (TBA) are also possible.

[0113] The tab plate (130) may include a side plate (131), a welded portion (132), a center plate (133), and an electrode terminal (134).

[0114] When the tab plate (130) is connected to or welded to the positive tab, the material of the tab plate (130) may include aluminum. In this case, the thickness of the tab plate (130) may be 0.1 to 0.2 mm.

[0115] When the tab plate (130) is connected to or welded to the cathode tab, the material of the tab plate (130) may include copper. In this case, the thickness of the tab plate (130) may be 0.2 to 0.4 mm.

[0116] The electrode terminal (134) can be energized to the terminal portion (122) of the cap assembly (120). In an embodiment of the present invention, the electrode terminal (134) can be energized to contact the terminal portion (122). The electrode terminal (134) may be cylindrical in shape, but is not limited thereto.

[0117] The center plate (133) may be plate-shaped, and electrode terminals (134) may be placed thereon.

[0118] The side plate (131) may be plate-shaped and may be connected to the center plate (133) by a link plate (133a). The side plate (131) may be connected to both sides of the center plate (133) along the first direction (D1).

[0119] Multiple electrode tab portions (TBA) can be welded to and connected to the side plate (131).

[0120] The weld (132) can be formed in the third direction (D3) on the side plate (131).

[0121] As described above, a plurality of electrode tabs (TB) may be stacked along a third direction (D3). Accordingly, in order to allow all of the plurality of electrode tabs (TB) to be energized to the side plate (131), a weld (132) may be formed on the side plate (131) in the third direction (D3).

[0122] Multiple welds (132) may be formed along the first direction (D1). Accordingly, multiple conductive portions may be formed between the side plate (131) and the electrode tab portion (TBA). This can increase the conductivity between the tab plate (130) and the electrode tab portion (TBA). For example, if only one weld (132) is formed, there is a possibility that some electrode tabs (TB) among the multiple electrode tabs (TB) may not be welded to the side plate (131) due to process errors. In this case, a problem may arise where the corresponding unit cell cannot be used.

[0123] Accordingly, a plurality of welds (132) can be formed between the side plate (131) and the electrode tab portion (TBA) so that all of the plurality of electrode tabs (TB) can be energized to the tab plate (130). This prevents the problem of a specific unit cell not being energized to the tab plate (130).

[0124] In embodiments of the present invention, LPW welding may be applied to the weld portion (132). LPW (Laser Powder Welding) welding may be a technique for welding by melting powder using a laser.

[0125] In an embodiment of the present invention, the center plate (133) and the side plate (131) may be in the shape of a square plate, but are not limited thereto.

[0126]

[0127] Referring to FIGS. 4, FIGS. 6a and FIGS. 6b, a cap assembly (120) can be coupled to a can assembly (110). The cap assembly (120) and the can assembly (110) can be coupled to form a case (101). The case (101) can form a receiving space (102) inside. An all-solid-state battery cell (10) can be accommodated in the receiving space (102).

[0128] The cap assembly (120) may include a cap body (121), a terminal part (122), and an insulating part (125).

[0129] The cap body (121) can be attached to the front and rear parts of the can assembly (110), respectively.

[0130] Referring to FIG. 6a, the cap body (121) is guided by a plurality of ribs (112) and can be coupled to a can assembly (110). And the tab plate (130) can be accommodated inside the cap body (121).

[0131] The terminal portion (122) can be positioned in the center of the cap body (121). A tab plate (130) can be in contact with the terminal portion (122) to allow for mutual electrical conduction.

[0132] For example, when the first electrode tab portion (TBA1) is connected to the positive electrode layer (20), the terminal portion (122) of the first cap body (120a) can be the positive electrode. And since the second electrode tab portion (TBA2) is connected to the negative electrode layer (30), the terminal portion (122) of the second cap body (120a) can be the negative electrode.

[0133] Conversely, when the first electrode tab (TBA1) is connected to the negative electrode layer (30), the terminal portion (122) of the first cap body (120a) can become the negative electrode. And since the second electrode tab (TBA2) is connected to the positive electrode layer (20), the terminal portion (122) of the second cap body (120a) can become the positive electrode.

[0134] One embodiment of the terminal portion (122) may be a form without the terminal hole (123) disclosed in FIG. 6a. In this case, the electrode terminal (134) may be in contact with the terminal portion (122) to conduct electricity to each other.

[0135] Another embodiment of the terminal portion (122) may be in the form of a terminal hole (123) that penetrates the terminal portion (122), as disclosed in FIG. 6a. The terminal hole (123) shown in FIG. 6a may be open. In this case, the electrode terminal (134) is inserted into the terminal hole (123) and can be electrically connected to it. And an external electrical wire can be directly connected to the electrode terminal (134).

[0136]

[0137] Referring to FIGS. 4 and FIGS. 6b, the insulating part (125) can be placed on the cap body (121).

[0138] The insulating part (125) may include a first insulating member (126) and a second insulating member (127).

[0139] In an embodiment of the present invention, the material of the first insulating member (126) may include a heat-resistant plastic. For example, it may include PPS material, but is not limited thereto. The material of the second insulating member (127) may include a plastic material. For example, it may include PET material, but is not limited thereto.

[0140] The first insulating member (126) can be placed between the cap body (121) and the terminal part (122) and can block current flow between the cap body (121) and the terminal part (122).

[0141] The first insulating member (126) may include an insulating plate (126a), a terminal insertion hole (126c), and an insulating line (126b).

[0142] The insulating plate (126a) may be plate-shaped and may be placed inside the cap body (121).

[0143] The terminal insertion hole (126c) can be formed by penetrating the insulating plate (126a). The electrode terminal (134) can be inserted into the terminal insertion hole (126c) and come into contact with the terminal portion (122).

[0144] On the insulating plate (126a), recessed concave portions (126d) may be formed on both sides of the terminal insertion hole (126c). The concave portions (126d) can reduce the weight of the insulating plate (126a). This allows the total weight of the all-solid-state battery (100) to be reduced. The concave portions (126d) may be formed when molding the insulating plate (126a).

[0145] The insulation line (126b) can be connected to the insulation plate (126a) and can protrude in a second direction (D2) along the edge of the insulation plate (126a). The insulation line (126b) can be positioned to penetrate the cap body (121). The insulation line (126b) can be positioned between the cap body (121) and the terminal part (122). Thus, the cap body (121) and the terminal part (122) can be insulated. Therefore, even if the electrode terminal (134) comes into contact with the terminal part (122), current may not flow to the cap body (121).

[0146] The second insulating member (127) may be disposed between the cap body (121) and the tab plate (130). The second insulating member (127) may block current flow between the cap body (121) and the tab plate (130). The second insulating member (127) may include an insulating block (127a) and an insulating rib (127b).

[0147] The insulating block (127a) may be plate-shaped and may be placed on both sides of the insulating plate (126a) along the first direction (D1) inside the cap body (121).

[0148] The insulating rib (127b) may be in the shape of a strap and may be arranged along the inner circumference of the cap body (121).

[0149] The insulating block (127a) and the insulating rib (127b) can block the tap plate (130) and the cap body (121) from being energized.

[0150] Referring to FIG. 6b, the side plate (131) can be in contact with the insulating block (127a). The insulating block (127a) supports the side plate (131) and can suppress the movement of the tab plate (130).

[0151] The insulating rib (127b) can be extended in the second direction (D2) to the portion where the side plate (131) is located. Even if the side plate (131) moves in the third direction (D3), the side plate (131) may first come into contact with the insulating rib (127b). Accordingly, the side plate (131) is prevented from coming into direct contact with the can assembly (110), thereby preventing the tab plate (130) and the can assembly (110) from being energized.

[0152] Although not illustrated in the drawing, the inner surface of the cap body (121) may be coated with a heat-resistant insulating material separately from the insulating part (125). In this case, the tab plate (130) can be more reliably blocked from conducting electricity to the cap body (121).

[0153]

[0154] Referring to FIGS. 4, 7a, and 7b, a tab finishing area (200) can be formed on a can assembly (110). Specifically, the tab finishing area (200) can be formed between a plurality of ribs (112).

[0155] Here, the electrode tab portion (TBA) may include a connecting portion connected to the tab plate (130) and a remaining portion not connected to the tab plate (130).

[0156] The connection portion of the electrode tab portion (TBA) can be defined as the portion welded to the side plate (131) of the tab plate (130). The remaining portion of the electrode tab portion (TBA) can be defined as the portion not welded to the side plate (131) of the tab plate.

[0157] The remaining portion of the electrode tab portion (TBA) can be placed in the tab cleaning area (200). And the connecting portion of the electrode tab portion (TBA) can be spaced apart from the can assembly (110).

[0158] Here, in an embodiment where a plurality of ribs (112) separated from each other are provided on the front and rear portions of the can assembly (110), the tab organizing area (200) may be formed between the plurality of ribs (112). As described above, the plurality of ribs (112) may include a center rib (112a) and a side rib (112b). Accordingly, the tab organizing area (200) may be formed between the center rib (112a) and the side rib (112b).

[0159] Alternatively, in an embodiment where a rib (112) is provided integrally formed on the front and rear portions of the can assembly (110), the rib (112) can be partially cut to form a tab cleaning area (200). In other words, the rib (112) of the can assembly (110) can be partially cut to form a tab cleaning area (200) so that the remaining portion of the electrode tab portion (TBA) can be cleaned. Accordingly, the rib (112) can be separated into a plurality of ribs (112).

[0160]

[0161] The tab organizing area (200) can be formed at a position corresponding to the electrode tab portion (TBA) based on the third direction (D3). Accordingly, when the electrode tab portion (TBA) is folded in the third direction (D3), the remaining portion of the electrode tab portion (TBA) can be placed in the tab organizing area (200).

[0162] Referring to FIGS. 7a and 7b, the tab organizing area (200) may include an upper tab organizing area (210) and a lower tab organizing area (220). A plurality of electrode tab portions (TBA1, TBA2) may be taped (TP) to the upper tab organizing area (210) or the lower tab organizing area (220).

[0163] A portion of the elastic sheet (140) may be exposed in the tab cleaning area (200). Accordingly, the remaining portion of the electrode tab (TBA) may be taped to the exposed portion of the elastic sheet (140).

[0164] Referring to FIG. 4, a portion of the all-solid-state battery cell (10) may be exposed and positioned between the plurality of ribs (112). Accordingly, a portion of the elastic sheet (140) surrounding the all-solid-state battery cell (10) may also be exposed and positioned up to the portion where the plurality of ribs (112) are positioned.

[0165] Since a tapping area (200) is formed by being recessed between the multiple ribs (112), a portion of the elastic sheet (140) can be exposed through the tapping area (200).

[0166] Therefore, the remaining portion of the electrode tab (TBA) can be taped to the elastic sheet (140) of the tab cleaning area (200).

[0167] A plurality of tab organizing areas (200) may be formed on the can assembly (110). In an embodiment of the present invention, a plurality of tab organizing areas (200) may be formed corresponding to each of the plurality of electrode tab portions (TBA).

[0168]

[0169] Referring to FIGS. 4, FIGS. 5a, FIGS. 5b, FIGS. 7a and FIGS. 7b, the all-solid-state battery (100) according to embodiments of the present invention may further include a vacuum section (300).

[0170] The vacuum section (300) can be placed in the cap assembly (120). Gas or moisture within the receiving space (102) can be discharged through the vacuum section (300) to create a vacuum state in the receiving space (102).

[0171] The vacuum section (300) may include a vacuum hole (310). The vacuum hole (310) may be positioned to penetrate the cap assembly (120), and the vacuum hole (310) may be in communication with the receiving space (102).

[0172] In an embodiment of the present invention, the vacuum hole (310) may have a circular cross-sectional shape. However, it is not necessarily limited thereto and may have a polygonal cross-sectional shape such as a square or hexagon.

[0173] Referring to FIG. 8, a solid-state battery (100) can be placed in a vacuum chamber (CB) to create a vacuum inside the case (101).

[0174] A vacuum device (VA) can be connected to the chamber space (CB1) of a vacuum chamber (CB). In this case, the vacuum device (VA) can draw in gas from the chamber space (CB1). Accordingly, gas or moisture in the receiving space (102) of the all-solid-state battery (100) can be discharged into the chamber space (CB1) through the vacuum hole (310). It can also be discharged to the outside through the vacuum device (VA). The vacuum device (VA) may be a vacuum pump, etc.

[0175] Although not illustrated in the drawing, in another form, the vacuum device (VA) can be directly connected to the vacuum hole (310) through piping. And gas or moisture in the receiving space (102) of the all-solid-state battery (100) can be directly sucked in and discharged through the vacuum hole (310).

[0176]

[0177] After exhausting gas or moisture in the receiving space (102) using a vacuum device (VA), the vacuum hole (310) can be sealed to maintain the receiving space (102) in a vacuum state.

[0178] Referring to FIG. 9, in an embodiment of the present invention, the vacuum hole (310) can be sealed by direct welding. The welding may be performed using a laser welding method, but is not limited thereto.

[0179] In one embodiment, the periphery of the vacuum hole (310) can be directly melted or the periphery of the vacuum hole (310) can be melted together with a solvent using a solvent to seal the vacuum hole (310) and the receiving space (102). The welded area (WD) can be formed by melting the vacuum hole (310) and the periphery of the vacuum hole (310).

[0180] Referring to FIG. 10, the vacuum unit (300) according to an embodiment of the present invention may further include a control unit (330). The control unit (330) can open and close the vacuum hole (310). In other words, when the control unit (330) is coupled to the vacuum hole (310), the vacuum hole (310) and the receiving space (102) can be sealed. When the control unit (330) is separated from the vacuum hole (310), the vacuum hole (310) and the receiving space (102) can be opened.

[0181] The control unit (330) can be coupled to or separated from the vacuum hole (310). The control unit (330) may include a pin stem (332) and a pin head (331).

[0182] The pin stem (332) may have a shape and size corresponding to the shape and size of the vacuum hole (310), and the pin stem (332) may be inserted into the vacuum hole (310).

[0183] The pin head (331) can be connected to the end of the pin stem (332). The pin head (331) can be formed to be larger than the pin stem (332). The pin head (331) may be cylindrical in shape. Alternatively, the pin head (331) may be in the shape of a polygonal column, such as a square or hexagon, to make it easy to grip and rotate.

[0184] In an embodiment of the present invention, the vacuum hole (310) may have a circular cross-sectional shape. Accordingly, the pin stem (332) may be a cylindrical shape having the same shape and size as the vacuum hole (310). If the vacuum hole (310) has a polygonal cross-sectional shape such as a square or hexagon, the pin stem (332) may also be a column shape having the same polygonal cross-section.

[0185] After placing the all-solid-state battery (100) into the vacuum chamber (CB) disclosed in FIG. 8 and creating a vacuum in the receiving space (102), a control unit (330) can be connected to the vacuum hole (310) using a separate device.

[0186] The control unit (330) is coupled to the vacuum hole (310), and the receiving space (102) can be sealed.

[0187] Afterward, the all-solid-state battery (100) can be removed from the vacuum chamber (CB) and sent to a welding facility to weld the pin head (331) of the control unit (330) to the cap body (121). A welded area (WD) can be formed along the circumference of the pin head (331). Accordingly, the control unit (330) can be fixed to the cap body (121), and the vacuum hole (310) and the receiving space (102) can be sealed.

[0188] Here, the outside may be in an atmospheric pressure state, and the receiving space (102) may be in a vacuum state. Therefore, since pressure is applied to the control unit (330) in the direction of the vacuum hole (310) due to the pressure difference, the control unit (330) may not be separated from the vacuum hole (310).

[0189] If it is necessary to regulate the vacuum state of the receiving space (102), the all-solid-state battery (100) can be placed in the vacuum chamber (CB). Then, the welded part (WD) can be removed and the control unit (330) can be separated from the vacuum hole (310). The vacuum state of the receiving space (102) can be regulated by sucking out the gas from the vacuum chamber (CB) with a vacuum device.

[0190] Again, if you want to seal the vacuum hole (310) and the receiving space (102), a new control unit (330) can be inserted into the vacuum hole (310) and welded. Of course, the existing control unit (330) can be repaired and reused.

[0191]

[0192] Referring to FIG. 11a and FIG. 11b, the adjustment unit (330) according to an embodiment of the present invention may include a pin head (331), a pin stem (332), a pin sealing (333), a sealing groove (313), a female screw portion (312), and a male screw portion (334).

[0193] The control unit (330) can be connected to or disconnected from the vacuum hole (310).

[0194] The pin stem (332) may have a shape and size corresponding to the shape and size of the vacuum hole (310), and the pin stem (332) may be inserted into the vacuum hole (310).

[0195] The pin head (331) can be connected to the end of the pin stem (332). The pin head (331) can be formed to be larger than the pin stem (332). The pin head (331) may be cylindrical in shape. Alternatively, the pin head (331) may be in the shape of a polygonal column, such as a square or hexagon, to make it easy to grip and rotate.

[0196] In an embodiment of the present invention, the vacuum hole (310) may have a circular cross-sectional shape. Accordingly, the pin stem (332) may be a cylindrical shape having the same shape and size as the vacuum hole (310). If the vacuum hole (310) has a polygonal cross-sectional shape such as a square or hexagon, the pin stem (332) may also be a column shape having the same polygonal cross-section.

[0197] A pin seal (333) may be placed at the lower end of the pin head (331). The pin seal may be placed around the circumference of the pin stem (332) on the lower end of the pin head (331). In an embodiment of the present invention, the pin seal (333) may be in the shape of an O-ring, but is not necessarily limited thereto.

[0198] The sealing groove (313) may be placed on the cap assembly (120) at the periphery of the vacuum hole (310). In one embodiment, the sealing groove (313) may be formed by being recessed along the periphery of the vacuum hole (310).

[0199] When the control unit (330) is coupled to the vacuum hole (310), the pin seal (333) can be inserted into and seated in the sealing groove (313). Accordingly, the seal is formed between the sealing groove (313) and the pin seal, so that external gas or moisture cannot enter the vacuum hole (310) and the receiving space (102).

[0200] The male screw portion (334) can be formed around the outer circumference of the pin stem (332). The female screw portion (312) can be formed around the inner circumference of the vacuum hole (310). Thus, the pin stem (332) can be threaded into the vacuum hole (310). In other words, the adjustment unit (330) can be attached to and detached from the vacuum hole (310).

[0201] After placing the all-solid-state battery (100) into the vacuum chamber (CB) disclosed in FIG. 8 and creating a vacuum in the receiving space (102), the control unit (330) can be connected to the vacuum hole (310) using a separate device. At this time, the separate device can hold the control unit (330) and rotate it to screw it into the vacuum hole (310).

[0202] The control unit (330) is coupled to the vacuum hole (310), and the receiving space (102) can be sealed. Since the pin sealing (333) is inserted into the sealing groove (313), external gas cannot pass through the vacuum hole (310).

[0203] As disclosed in FIG. 11b, since the vacuum hole (310) can be completely sealed by the control unit (330), there may be no need to separately weld the control unit (330) to the cap body (121).

[0204] Additionally, as described above, the outside may be in an atmospheric pressure state, and the receiving space (102) may be in a vacuum state. Therefore, since pressure is applied to the control unit (330) in the direction of the vacuum hole (310) due to the pressure difference, the control unit (330) may not be separated from the vacuum hole (310).

[0205] In summary, the control unit (330) and the vacuum hole (310) are connected by screw threads, and due to the pressure difference between the outside and the inside of the receiving space (102), the control unit (330) may not be easily separated from the vacuum hole (310). This can improve the sealing performance of the receiving space (102).

[0206] If a separate welding process is performed, the all-solid-state battery (100) can be sent to a welding facility to weld the pin head (331) of the control unit (330) to the cap body (121).

[0207]

[0208] If it is necessary to adjust the vacuum state of the receiving space (102), the all-solid-state battery (100) can be placed in the vacuum chamber (CB). Then, the control unit (330) can be grasped and rotated with a separate device to be separated from the vacuum hole (310). The vacuum state of the receiving space (102) can be adjusted by sucking out the gas from the vacuum chamber (CB) with a vacuum device.

[0209] Again, if you want to seal the vacuum hole (310) and the receiving space (102), you can hold the control unit (330) with a separate device and rotate it to connect it to the vacuum hole (310). By doing so, the vacuum hole (310) and the receiving space (102) can be sealed again.

[0210] The control unit (330) according to an embodiment of the present invention can easily open and close the vacuum hole (310) and the receiving space (102) through the detachable structure described above. It also allows for easy control of the vacuum state of the receiving space (102).

[0211]

[0212] FIGS. 12a to 12g disclose a door assembly (360) of a vacuum section (300) according to an embodiment of the present invention.

[0213] Referring to FIGS. 12a to 12g, a door assembly (360) according to an embodiment of the present invention may be disposed on a cap assembly (120) at the periphery of a vacuum hole (310). The door assembly (360) may open and close the vacuum hole (310) by a pressure difference.

[0214] The door assembly (360) may include a door body (361), a support flange (362), a support beam (363), an opening hole (364), a door cover (365), and a door pad (366).

[0215] The door body (361) may be positioned on the cap assembly (120) around the vacuum hole (310). The door body (361) may be formed to be larger than the vacuum hole (310). A fastening groove (367) may be formed on the door body (361). A fastening member (368) is coupled to the fastening groove (367) to secure the door body (361) to the cap body (121). The fastening member (368) may be a bolt, but other fastening means may also be included. In an embodiment of the present invention, the door body (361) may be cylindrical in shape, but is not necessarily limited thereto.

[0216] The opening hole (364) can be formed by penetrating the central part of the door body (361). Referring to FIG. 12d, the location where the opening hole (364) is formed on the door body (361) may correspond to the location of the vacuum hole (310) with respect to the second direction (D2).

[0217] The door pad (366) can be placed in the opening hole (364). The door pad (366) can be opened and closed by a pressure difference. The door pad (366) may be made of a soft material such as rubber or silicone.

[0218] Therefore, when a pressure difference occurs, the door pad (366) can open in the direction of lower pressure to open the vacuum hole (310).

[0219] Specifically, referring to FIGS. 12a and FIGS. 12d, the door pad (366) may include a plurality of door pads (366). The plurality of door pads (366) may be arranged in contact with each other in the opening hole (364). When the plurality of door pads (366) are arranged in contact with each other, the opening hole (364) may be sealed.

[0220] Referring to FIG. 12c and FIG. 12e, when a pressure difference occurs, the multiple door pads (366) can spread apart from each other to open the opening hole (364).

[0221] Referring to FIGS. 12f and 12g, a grid structure (369) may be placed inside the door pad (366). The grid structure (369) can reinforce the rigidity of the door pad (366). The grid structure (369) may be made of a metal material such as steel or stainless steel. The grid structure (369) may form a grid by having multiple metal wires arranged across each other. Thus, the grid structure (369) can reinforce the rigidity of the door pad (366) without compromising the flexibility of the door pad (366).

[0222] Alternatively, the door pad (366) may be opened when the all-solid-state battery (100) is placed inside the vacuum chamber (CB) and the receiving space (102) is created in a vacuum state. When the vacuum device sucks gas from the vacuum chamber (CB), the door pad (366) opens in the opposite direction of the vacuum hole (310) due to the pressure difference, and the gas or moisture in the receiving space (102) can be discharged through the vacuum hole (310).

[0223] The support flange (362) can be positioned to protrude from the inner circumference of the opening hole (364) toward the center of the opening hole (364).

[0224] A support beam (363) may be positioned across a support flange (362). Multiple support beams (363) may be positioned. Referring to FIG. 12b, in an embodiment of the present invention, multiple support beams (363) may be positioned to intersect each other.

[0225] Referring to FIG. 12d, the support flange (362) and the support beam (363) can support one side of the door pad (366). Accordingly, the door pad (366) may not open toward the vacuum hole (310). In other words, the support flange (362) and the support beam (363) can prevent the door pad (366) from opening toward the receiving space (102).

[0226] According to the above structure, even if the external air pressure is higher than the air pressure in the receiving space (102), the door pad (366) is not opened, so external gas cannot flow into the receiving space (102). This prevents external gas from flowing into the receiving space (102) even when the all-solid-state battery (100) is placed and used under atmospheric pressure, thereby allowing the receiving space (102) to maintain a vacuum state.

[0227] The door cover (365) can be attached to the door body (361). The door cover (365) is attached to the door body (361) and can seal the opening hole (364) and the door pad (366) from the outside. The door cover (365) can be detached from the door body (361) and can open the opening hole (364) and the door pad (366) to the outside.

[0228] A cover screw portion (365a) may be formed on the inner surface of the door cover (365). A body screw portion (361a) may be formed on the outer surface of the door body (361). The door cover (365) and the door body (361) may be joined by mutual screw threads or separated from each other.

[0229] If there is no need to adjust the vacuum state of the receiving space (102), a door cover (365) can be attached to the door body (361) to block the opening hole (364) and the door pad (366) from being exposed to the outside. In this case, the door pad (366) cannot be opened.

[0230] Specifically, since one side of the door pad (366) is supported by a support flange (362) and a support beam (363), the door pad (366) cannot spread toward the vacuum hole (310) and the receiving space (102). Also, since the other side of the door pad (366) is supported by contacting the door cover (365), the door pad (366) cannot spread toward the door cover (365) and outward. Therefore, the vacuum hole (310) can be sealed.

[0231]

[0232] The configuration of the door assembly (360) according to the embodiment of the present invention is as described above, and the operation method of the door assembly (360) will be explained below.

[0233] The door cover (365) can be separated from the door body (361) using a separate device. The separate device can grasp the door cover (365) and rotate it to separate it from the door body (361). The separate device may be connected to the vacuum chamber (CB) or may be separated from the vacuum chamber (CB).

[0234] The transfer device can place the all-solid-state battery (100) into the vacuum chamber (CB) disclosed in FIG. 8. And it can operate the vacuum device (VA). The vacuum device (VA) can discharge the gas in the chamber space (CB1) to the outside. Accordingly, the air pressure in the chamber space (CB1) can be lowered.

[0235] Since the door cover (365) is separated from the door body (361), the door pad (366) can be opened outward.

[0236] Before a pressure difference occurs, as disclosed in FIG. 12a, a plurality of door pads (366) may be in contact with each other to seal the vacuum hole (310).

[0237] As the air pressure in the chamber space (CB1) decreases, an air pressure difference may occur between the chamber space (CB1) and the receiving space (102). Accordingly, referring to FIGS. 12c and 12e, a plurality of door pads (366) may spread apart from each other to open the opening hole (364). Gas or moisture within the receiving space (102) may be discharged into the chamber space (CB1) through the vacuum hole (310).

[0238] Although not illustrated in the drawings, in other embodiments, the vacuum device (VA) may be directly connected to the door assembly (360) through piping. This allows gas or moisture in the receiving space (102) of the all-solid-state battery (100) to be directly sucked in and discharged through the vacuum hole (310).

[0239] As the vacuum device (VA) directly sucks in the gas, the gas in the receiving space (102) can be discharged towards the vacuum device through the vacuum hole (310) by opening the door pad (366) due to the pressure difference.

[0240] After creating a vacuum in the receiving space (102), the door cover (365) can be grasped using a separate device and screwed onto the door body (361). As a result, the door pad (366) cannot move, and the vacuum hole (310) can be sealed.

[0241]

[0242] If it is necessary to adjust the vacuum state of the receiving space (102), the all-solid-state battery (100) can be placed in the vacuum chamber (CB). Then, the door cover (365) can be separated from the door body (361) using a separate device. Gas in the vacuum chamber (CB) can be sucked in by a vacuum device so that the door pad (366) opens due to the pressure difference. Gas or moisture in the receiving space (102) can be discharged into the chamber space (CB1) through the vacuum hole (310) and discharged to the outside through the vacuum device (VA). In this way, the vacuum state in the receiving space (102) can be adjusted.

[0243] After the vacuum formation process is finished, the door cover (365) can be attached to the door body (361) to seal the vacuum hole (310) again.

[0244] The door assembly (360) according to an embodiment of the present invention can easily open and close the vacuum hole (310) and the receiving space (102) through an opening and closing structure based on a pressure difference. It also allows for easy control of the vacuum state of the receiving space (102).

[0245]

[0246] The configuration of the all-solid-state battery according to the embodiments of the present invention is as described above, and below, a method for manufacturing the all-solid-state battery (100) according to the embodiments of the present invention will be described.

[0247] The all-solid-state battery (100) described above can be manufactured through the manufacturing method of the all-solid-state battery (100). Therefore, the structure of the all-solid-state battery (100) may be included in the manufacturing method of the all-solid-state battery (100) even if it is not described below in the manufacturing method of the all-solid-state battery (100).

[0248] Referring to FIG. 13, a method for manufacturing an all-solid-state battery (100) according to embodiments of the present invention may include placing an all-solid-state battery cell (10) inside a can assembly (110) (S1), connecting an electrode tab portion (TBA) of the all-solid-state battery cell (10) to a tab plate (130) (S2), combining a cap assembly (120) with the can assembly (110) to form a case (101) including a receiving space (102) (S3), creating a vacuum state in the receiving space (102) (S4), and sealing the receiving space (102) (S5).

[0249] Placing a solid-state battery cell (10) inside the can assembly (110) (S1) can be done by wrapping the solid-state battery cell (10) with an elastic sheet (140) and accommodating the solid-state battery cell (10) while pressing it with the can assembly (110).

[0250] First, the perimeter surface of the all-solid-state battery cell (10) can be wrapped with an elastic sheet (140). An electrode tab portion (TBA) can be placed on the front and rear portions of the all-solid-state battery cell (10). The elastic sheet (140) can wrap the remaining portion of the all-solid-state battery cell (10), excluding the front and rear portions of the all-solid-state battery cell (10).

[0251] As described above, the can assembly (110) may include a plurality of can bodies (111a, 111b). The plurality of can bodies (111a, 111b) are combined with each other and can accommodate an all-solid-state battery cell (10) inside. The plurality of can bodies (111a, 111b) can apply pressure to the upper and lower parts of the all-solid-state battery cell (10). In other words, with respect to the third direction (D3), the upper can body (111a) and the lower can body (111b) are combined with each other and apply surface pressure to the all-solid-state battery cell (10), and can accommodate the all-solid-state battery cell (10).

[0252] Additionally, the upper can body (111a) and the lower can body (111b) can form a can assembly (110) by welding the joint (111c). The welding method may be laser welding, but is not limited thereto.

[0253]

[0254] Connecting the electrode tab portion (TBA) of the above-mentioned all-solid-state battery cell (10) to the tab plate (130) (S2) may involve aligning a plurality of electrode tab portions (TBA) and welding a plurality of electrode tab portions (TBA) to the tab plate (130).

[0255] Referring to FIGS. 3 and 4, in an embodiment of the present invention, a pair of electrode tab portions (TBA11, TBA12) may be arranged along a first direction (D1). One of the pair of electrode tab portions (TBA11, TBA12) may be aligned by bending upward. The other of the pair of electrode tab portions (TBA11, TBA12) may be aligned by bending downward.

[0256] Multiple electrode tabs (TB) can be arranged in multiple layers along the third direction (D3). Therefore, in order to weld all the multiple electrode tabs (TB) to the tab plate (130), in step (S2), a weld (132) can be formed on the tab plate (130) in an up-and-down direction along the third direction (D3).

[0257] In addition, in the above step (S2), a plurality of welds (132) may be formed along the first direction (D1). The welding method may be laser welding, but is not limited thereto.

[0258] Referring to FIG. 4, it can be seen that a weld (132) is formed lengthwise along the third direction (D3) and multiple welds (132) are formed along the first direction (D1). In step (S2), through the structure of the weld (132), all of the multiple electrode tabs (TB) can be stably energized to the side plate (131) of the tab plate (130).

[0259]

[0260] Meanwhile, although not disclosed in FIG. 13, the method for manufacturing an all-solid-state battery may add the following steps.

[0261] The method for manufacturing an all-solid-state battery according to an embodiment of the present invention may further include taping (TP) the remaining portion that is not welded to the tab plate (130) on the electrode tab portion (TBA) to the tab finishing area (200).

[0262] In other words, before attaching the cap assembly (120) to the can assembly (110), the remaining portion of the electrode tab (TBA) can be cleaned by taping (TP) it to the tab cleaning area (200).

[0263] The remaining portion that is not welded to the tab plate (130) on the electrode tab portion (TBA) can be taped and placed in the tab finishing area (200) by taping (TP) the remaining portion that is not welded to the side plate (131) of the tab plate (130) among the electrode tabs (TB) constituting the electrode tab portion (TBA) to the elastic sheet (140).

[0264] Referring to FIG. 4, a plurality of electrode tabs (TB) can be aligned to bend upward or downward in order to weld them to the side plate (131). This can be done in step (S2). Accordingly, the plurality of electrode tabs (TB) can be arranged by bending upward or downward.

[0265] Multiple electrode tabs (TB) can be welded to the side plate (131) using a laser welding device. This can be performed in step (S2).

[0266] At this time, the ends of some of the electrode tabs among the plurality of electrode tabs (TB) may be further extended upward or downward without being welded to the side plate (131).

[0267] The ends of some electrode tabs (TB) can be gathered together and taped (TP). This prevents the ends of some electrode tabs (TB) from being short-circuited to the can assembly (110).

[0268] Referring to FIG. 4, the ends of some electrode tabs (TB1, TB2) that have been taped (TP) can be fixed to an elastic sheet (140).

[0269]

[0270] Forming a case (101) by joining the cap assembly (120) to the can assembly (110) (S3) can be achieved by guiding the cap assembly (120) by the rib (112) formed on the can assembly (110) and joining the cap assembly (120) to the can assembly (110). The cap assembly (120) and the can assembly (110) can be joined to form a case (101). The interior of the case (101) may have a receiving space (102) in which an all-solid-state battery cell (10) is received. The receiving space (102) may be sealed. The receiving space (102) may be formed in a vacuum state.

[0271] Referring to FIGS. 4 and FIGS. 7b, the tab plate (130) may be located inside the cap assembly (120). At this time, to prevent the tab plate (130) and the cap assembly (120) from short-circuiting, the insulating block (127a) of the second insulating member (127) may come into contact with the side plate (131) and prevent the side plate (131) from moving in the second direction (D2). Additionally, the insulating rib (127b) of the second insulating member (127) may prevent contact with the cap body (121) even if the side plate (131) moves in the third direction (D3).

[0272] The electrode terminal (134) can be inserted into the terminal insertion hole (126c) of the first insulating member (126), and the electrode terminal (134) can be in contact with the terminal portion (122) and energized. Alternatively, a terminal hole (123) may be formed in the terminal portion (122), and the electrode terminal (134) may be exposed to the outside and connected to an external electrical wire.

[0273]

[0274] Creating a vacuum state in the above-mentioned receiving space (102) (S4) allows the all-solid-state battery (100) to be placed in a vacuum chamber (CB) and the gas or moisture in the receiving space (102) to be discharged.

[0275] Referring to FIG. 8, an all-solid-state battery (100) can be placed in the chamber space (CB1) of a vacuum chamber (CB). Although not shown in the drawing, a structure can be provided inside the chamber space (CB1) to allow the all-solid-state battery (100) to be seated.

[0276] The vacuum device can draw in gas within the chamber space (CB1) to create a vacuum state within the chamber space (CB1).

[0277] Accordingly, a pressure difference occurs between the chamber space (CB1) and the receiving space (102), and gas or moisture in the receiving space (102) can be discharged into the chamber space (CB1) through the vacuum hole (310).

[0278] At this time, as disclosed in FIGS. 12a to 12g, when a door assembly (360) is placed in the vacuum hole (310), the door pad (366) opens and gas or moisture in the receiving space (102) can be discharged into the chamber space (CB1).

[0279]

[0280] Sealing the above-mentioned receiving space (102) (S5) can be achieved by closing the vacuum hole (310) to seal the receiving space (102).

[0281] A method of sealing the receiving space (102) can be done by directly welding the vacuum hole (310) as disclosed in FIG. 9. In this way, the receiving space (102) can be sealed and the vacuum state of the receiving space (102) can be maintained.

[0282] Alternatively, as disclosed in FIG. 10, the vacuum hole (310) can be sealed by joining the control unit (330) to the vacuum hole (310) and then welding the control unit (330) to the cap body (121). In this way, the receiving space (102) can be sealed.

[0283] Alternatively, as disclosed in FIG. 11a and FIG. 11b, the vacuum hole (310) can be sealed by threading the control unit (330) into the vacuum hole (310). The pin seal (333) is inserted into the sealing groove (313) and can prevent gas from flowing through the vacuum hole (310). As described above, the control unit (330) may not be separated from the vacuum hole (310) due to the pressure difference between the external atmospheric pressure and the vacuum state of the receiving space (102). Thus, the receiving space (102) can be sealed.

[0284] Alternatively, as disclosed in FIGS. 12a to 12g, a door assembly (360) may be placed in the vacuum hole (310). In this case, the vacuum hole (310) and the receiving space (102) can be sealed by a simple method of attaching a door cover (365) to the door body (361).

[0285] A solid-state battery (100) can be manufactured through the above step (S5).

[0286] Other manufacturing processes may be added as needed after the above step (S5). Additionally, other manufacturing processes may be added as needed between the above steps (S1 to S5).

[0287]

[0288] Through the structure and manufacturing method described above, the all-solid-state battery and the method for manufacturing the all-solid-state battery according to the present invention can facilitate the internal vacuum composition of the prismatic all-solid-state battery. Furthermore, the internal vacuum state of the prismatic all-solid-state battery can be adjusted by opening and closing as needed or during maintenance. This minimizes or prevents the reaction of the solid electrolyte of the all-solid-state battery with moisture in the air. This prevents the degradation of the all-solid-state battery and reduces various fire risks, thereby increasing product reliability.

[0289] Although embodiments of the present invention have been described above with reference to the attached drawings, the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. A can assembly that accommodates an all-solid-state battery cell inside; A cap assembly coupled to the above can assembly; and A vacuum portion disposed in the above-mentioned cap assembly; comprising The above cap assembly and the above can assembly form a receiving space in which an all-solid-state battery cell is received, and the receiving space is sealed. The above vacuum section includes a vacuum hole disposed in the cap assembly; The above vacuum hole is in communication with the above receiving space, an all-solid-state battery.

2. In Paragraph 1, A solid-state battery in which gas or moisture within the receiving space is discharged through the vacuum section to create a vacuum state in the receiving space.

3. In Paragraph 1, A solid-state battery in which the above vacuum hole is welded to maintain a vacuum state within the above receiving space.

4. In Paragraph 1, The above vacuum section is, A control unit for opening and closing the above vacuum hole; A solid-state battery that further includes 5. In Paragraph 4, The above-mentioned control unit is, A pin stem inserted into the above vacuum hole; and A pin head connected to the end of the pin stem; comprising A solid-state battery in which the shape and size of the above-mentioned pin stem correspond to the shape and size of the above-mentioned vacuum hole.

6. In Paragraph 5, A solid-state battery in which the pinhead is welded to the periphery of the vacuum hole to maintain a vacuum state within the receiving space.

7. In Paragraph 5, The above-mentioned control unit is, A pin sealing disposed at the lower part of the pin head; and It further includes a sealing groove disposed around the vacuum hole on the above-mentioned cap assembly, and The above pin sealing is inserted into the sealing groove of an all-solid-state battery.

8. In Paragraph 5, The above-mentioned control unit is, A male screw portion formed on the outer surface of the above pin stem; and It further includes a female screw portion formed on the inner surface of the vacuum hole; and The above pin stem is a solid-state battery that is threaded into the above vacuum hole.

9. In Paragraph 1, The above vacuum section is, A door assembly disposed at the periphery of the vacuum hole on the cap assembly; comprising The above door assembly is an all-solid-state battery that opens and closes the vacuum hole by a pressure difference.

10. In Paragraph 9, The above door assembly is, A door body disposed around the vacuum hole on the above-mentioned cap assembly; An opening hole formed in the central part of the above door body; and Includes a door pad disposed in the above-mentioned opening; The above door pad is configured to open and close by a pressure difference, in a solid-state battery.

11. In Paragraph 10, The above door assembly is, A support flange disposed around the inner perimeter of the above-mentioned opening; and It further includes a support beam positioned across the above support flange, and The support flange and the support beam support one side of the door pad, and A solid-state battery configured such that the above door pad is prevented from opening toward the above receiving space.

12. In Paragraph 11, The above door pad is made of a flexible material, and The above door pad is a solid-state battery that bends and deforms in the opposite direction of the above receiving space.

13. In Paragraph 10, The above door assembly is, It further includes a door cover coupled to the above door body, The above door cover is configured to seal the above opening hole and the above door pad from the outside, for an all-solid-state battery.

14. In Paragraph 13, The above door assembly is, A body screw portion formed on the outer surface of the above door body; and Includes a cover screw portion formed on the inner surface of the above door cover; and The above door cover is a solid-state battery that is detachably attached to the above door body.

15. In Paragraph 10, The above door assembly is, It further includes a grid structure disposed inside the door pad; and The above grid structure reinforces the rigidity of the door pad, and The above lattice structure is a solid-state battery composed of a metal material.

16. In Paragraph 1, It further includes a tab plate connected to the electrode tab portion of the all-solid-state battery cell; The above tab plate is, Electrode terminals; A plate-shaped center plate on which the above electrode terminals are arranged; and Includes a side plate connected to the center plate; The above side plates are arranged on both sides of the center plate along the first direction (D1), and The above electrode tab portion is welded to the side plate, an all-solid-state battery.

17. In Paragraph 16, The above cap assembly is, A cap body coupled to the above can assembly; and A terminal portion disposed in the central part of the above-mentioned cap body, said terminal portion is energized to said electrode terminal; and Including an insulating part disposed on the above-mentioned cap body; The above insulating part is, A first insulating member disposed between the above-mentioned cap body and the above-mentioned terminal portion; and A second insulating member disposed between the cap body and the tab plate; comprising The first insulating member is configured to block current flow between the cap body and the terminal part, and The above-described second insulating member is configured to block current flow between the cap body and the tab plate, in a solid-state battery.

18. In Paragraph 17, The first insulating member above is, An insulating plate disposed inside the above-mentioned cap body; A terminal insertion hole formed in the insulating plate; and Including an insulating line disposed between the above-mentioned cap body and the above-mentioned terminal part; The electrode terminal is inserted into the terminal insertion hole above. The above insulation line is connected to the insulation plate, and the insulation line is configured to insulate the cap body and the terminal part. The above second insulating member is, Insulating blocks disposed on both sides of the insulating plate along the first direction (D1) inside the cap body; and Insulating ribs arranged along the inner circumference of the above-mentioned cap body; including A solid-state battery in which the insulating block and the insulating rib are configured to block current flow between the tab plate and the cap body.

19. Placing an all-solid-state battery cell inside a can assembly; Connecting the electrode tab portion of the above-mentioned all-solid-state battery cell to the tab plate; A cap assembly is coupled to the can assembly to form a case, a receiving space for accommodating the all-solid-state battery cell is formed inside the case, and a vacuum portion is formed in the cap assembly; Discharging gas or moisture within the above-mentioned receiving space through the vacuum section to create a vacuum state in the above-mentioned receiving space; and Sealing the receiving space by closing the vacuum section; A method for manufacturing an all-solid-state battery comprising 20. In Paragraph 19, The above can assembly includes a plurality of can bodies, and The plurality of can bodies above pressurize the upper and lower parts of the all-solid-state battery cell and are joined together, Method for manufacturing an all-solid-state battery.

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