WO2023043180A1 - 전극 조립체, 이의 제조 장치, 및 이의 제조 방법 - Google Patents
전극 조립체, 이의 제조 장치, 및 이의 제조 방법 Download PDFInfo
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- WO2023043180A1 WO2023043180A1 PCT/KR2022/013708 KR2022013708W WO2023043180A1 WO 2023043180 A1 WO2023043180 A1 WO 2023043180A1 KR 2022013708 W KR2022013708 W KR 2022013708W WO 2023043180 A1 WO2023043180 A1 WO 2023043180A1
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- Prior art keywords
- electrode
- separator
- separator sheet
- adhesive
- region
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title description 31
- 239000000853 adhesive Substances 0.000 claims abstract description 141
- 230000001070 adhesive effect Effects 0.000 claims abstract description 141
- 239000012790 adhesive layer Substances 0.000 claims description 58
- 239000003792 electrolyte Substances 0.000 claims description 10
- 239000008151 electrolyte solution Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 description 24
- 239000011230 binding agent Substances 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
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- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
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- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an electrode assembly, a manufacturing apparatus thereof, and a manufacturing method thereof, and more particularly, to a battery cell in which electrodes and separator sheets are stacked in a Z-folding type, wherein the electrode can be prevented from departing from its position It relates to an electrode assembly, a manufacturing apparatus thereof, and a manufacturing method thereof.
- types of secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, lithium ion batteries, and lithium ion polymer batteries. These secondary batteries are used not only for small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs, portable game devices, power tools, and E-bikes, but also for large products that require high power, such as electric vehicles and hybrid vehicles, and surplus power generation. It is applied and used to a power storage device for storing power or renewable energy and a power storage device for backup.
- an electrode assembly having a predetermined shape is formed by applying an electrode active material slurry to a positive electrode current collector and a negative electrode current collector to prepare a positive electrode and a negative electrode, and then stacking them on both sides of a separator. Then, the electrode assembly is accommodated in the battery case, and the electrolyte is injected and then sealed.
- Electrode assemblies are classified into various types. For example, a simple stack type in which anodes, separators, and cathodes are continuously stacked by crossing anodes, separators, and cathodes without manufacturing unit cells is first manufactured using anodes, separators, and cathodes, and then these unit cells are manufactured.
- Lamination & Stack Type L&S, Lamination & Stack Type
- stack and folding in which a plurality of unit cells are spaced apart and attached to one side of a long separator sheet, and the separator sheet is repeatedly folded in the same direction from one end.
- a plurality of electrodes or unit cells are alternately attached to one side and the other side of a long separator sheet, respectively, and the separator sheet is folded from one end in a specific direction and then folded in the opposite direction.
- An object to be solved by the present invention is an electrode assembly in which electrodes and separator sheets are stacked in a Z-folding type, and an electrode assembly capable of preventing the electrode from leaving its original position, a manufacturing device thereof, and a manufacturing method thereof. is to do
- An electrode assembly manufacturing apparatus includes a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed; a second electrode supply unit provided with a second electrode sheet on which a plurality of second electrodes are formed; a separator supply unit that is folded when the first electrode or the second electrode is seated, and provides a separator sheet covering the electrode and stacked with the electrode; a table on which the first electrode and the second electrode are seated on an upper surface so as to have the separator sheet folded between the first electrode and the second electrode to form the electrode assembly; a separator guide for guiding a folding direction of the separator sheet; and a pair of upper applicators for applying adhesive to at least a portion of the separator sheet positioned between the table and the separator guide, wherein the table rotates between the first electrode supply unit and the second electrode supply unit. reciprocating motion, and the separator guide and the pair of upper nozzles linearly reciprocate left and right with respect to the table.
- the first electrode may be seated on a first region of the separator sheet, and the second electrode may be seated on a second region of the separator sheet.
- the pair of upper applicators include a first upper nozzle and a second upper nozzle, the first upper nozzle applies the adhesive to at least a part of the second region of the separator sheet, and the second upper nozzle The adhesive may be applied to at least a part of the first region of the separator sheet.
- an end of the first upper nozzle or an end of the second upper nozzle may rotate in a direction adjacent to the separator sheet.
- the first upper nozzle and the second upper nozzle may be disposed on both sides with the separator guide interposed therebetween.
- the first upper nozzle moves in a straight line on the second area of the separator sheet, and the second electrode moves on the second area of the separator sheet.
- the second upper nozzle may linearly move on the first area of the separator sheet.
- the separator guide moves linearly in a direction toward the second electrode reel, and in the first region of the separator sheet At the same time that the second upper nozzle applies the adhesive to at least a portion, the separator guide may linearly move in a direction toward the first electrode reel.
- the separator guide moves linearly in a direction in which the second region of the separator sheet to which the adhesive is applied covers the first electrode, and the adhesive application of the second upper nozzle When is completed, the separator guide linearly moves in a direction in which the first region of the separator sheet to which the adhesive is applied covers the second electrode.
- first header adsorbing the first electrode and seating the first electrode in the first region
- second header adsorbing the second electrode and seating it in the second area, wherein the first header and the second header rotate and reciprocate in a direction positioned on the table.
- the lower applicator When the first electrode is adsorbed to the first header, the lower applicator applies the adhesive to the lower portion of the first electrode, and when the second electrode is adsorbed to the second header, the lower applicator applies the second electrode to the second header.
- the adhesive is applied to the lower part of the electrode.
- first transfer device for transferring the first electrode toward the table
- second transfer device for transferring the second electrode toward the table
- the first transfer device includes a first groove open toward the first electrode, and the lower nozzle applies the adhesive to the lower portion of the first electrode through the first groove
- the second transfer device includes a second groove open toward the second electrode, and the lower applicator applies the adhesive to the lower portion of the second electrode through the second groove.
- An electrode assembly manufacturing method includes forming a plurality of first electrodes by cutting a first electrode sheet provided from a first electrode supply unit; seating the separator sheet provided from the separator supply unit on the table along the separator guide; applying an adhesive to a lower portion of the first electrode by a lower applicator; seating the first electrode on a first region of the separator sheet; applying, by a first upper nozzle, an adhesive to at least a part of a second region of the separator sheet; and folding the separator sheet in a folding direction guided by a separator guide so that a second region of the separator sheet coated with the adhesive covers the first electrode.
- the table rotates and reciprocates between the first electrode supply unit and the second electrode supply unit, and the separator guide and the pair of upper applicators linearly reciprocate left and right with respect to the table.
- the end of the first upper nozzle or the end of the second upper nozzle moves in a direction adjacent to the separator sheet. make a rotational movement
- An electrode assembly in which electrodes and separator sheets are alternately stacked according to another embodiment of the present invention wherein the electrode includes a first electrode and a second electrode, and the separator sheet has a zigzag shape formed by folding at least twice.
- the separator sheet is folded in a state in which the first electrode is seated on the first region of the separator sheet so that the second region of the separator sheet covers the first electrode, and on the second region
- the second electrode is folded in a seated state so that the first region of the separator sheet covers the second electrode, and an adhesive layer is formed between the electrode and the separator sheet.
- the adhesive layer may include a first adhesive layer and a second adhesive layer, the first adhesive layer may be positioned between the lower part of the electrode and the separator sheet, and the second adhesive layer may be positioned between the upper part of the electrode and the separator sheet. .
- a battery cell according to another embodiment of the present invention is a battery cell including the electrode assembly described above, and includes a battery case accommodating the electrode assembly together with an electrolyte solution, and the adhesive layer is dissolved in the electrolyte solution.
- the present invention is an electrode assembly in which electrodes and separator sheets are laminated in a Z-folding type, and an adhesive is pre-coated on top and bottom of the electrode, an apparatus for manufacturing the same, and a method for manufacturing the same, wherein the electrode is Deviation from position can be prevented.
- FIG. 1 is a flowchart of a method for manufacturing an electrode assembly according to an embodiment of the present invention.
- FIG. 2 is a schematic view showing a state in which a first electrode is seated on a first region of a separator sheet in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention.
- FIG. 3 is a schematic view showing a state in which an adhesive is applied to a lower portion of a first electrode in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
- FIG. 4 is a schematic view showing the state of applying an adhesive to the lower part of the first electrode in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.
- FIG. 5 and 6 show that in the apparatus for manufacturing an electrode assembly according to an embodiment of the present invention, the table rotates, the separator guide and the first upper nozzle linearly move, and the first upper nozzle rotates to reach the second area. It is a schematic diagram showing the state of applying the adhesive.
- FIG. 7 is a schematic view showing a state in which a second region to which an adhesive is applied covers a first electrode while a separator guide linearly moves in an opposite direction in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram showing a state in which a second electrode is seated on a second region of a separator sheet in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
- FIG. 9 is a cross-sectional view of an electrode assembly according to an embodiment of the present invention.
- FIG. 10 is an exploded perspective view of a battery cell according to an embodiment of the present invention.
- planar image it means when the target part is viewed from above, and when it is referred to as “cross-sectional image”, it means when a cross section of the target part cut vertically is viewed from the side.
- 1 is a flowchart of a method for manufacturing an electrode assembly according to an embodiment of the present invention.
- 2 is a schematic view showing a state in which a first electrode is seated on a first region of a separator sheet in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention.
- An electrode assembly manufacturing apparatus includes a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed, and a second electrode sheet on which a plurality of second electrodes are formed.
- Separator provided with a separator sheet that is folded when the two-electrode supply unit, the first electrode or the second electrode is seated, and covers the first electrode or the second electrode and is laminated with the first electrode or the second electrode
- the group reciprocates linearly from side to side with respect to the table.
- the method of manufacturing an electrode assembly includes forming electrodes 11 by cutting electrode sheets 1111 and 1121 (S101); A step of seating the separator sheet 122 on the table 16 (S102); Applying an adhesive to the lower portions of the electrodes 1112 and 1122 (S103); seating the electrodes 1112 and 1122 on the separator sheet 122 (S104); Applying an adhesive to the separator sheet 122 (S104); and folding the separator sheet 122 to which the adhesive is applied and covering the electrodes 1112 and 1122 (S105).
- the electrode 11 and the separator sheet 122 are stacked in a Z-folding type, the upper and lower portions of the electrode 11 in contact with the separator sheet 122 are Since the adhesive is applied to each of them, it is possible to prevent the electrode 11 from being detached from its original position.
- An electrode assembly manufacturing apparatus 1 includes electrode reels 111 and 112 from which an electrode sheet on which a plurality of electrodes 11 are formed is unwound; a separator reel 121 that is folded when the electrode 11 is seated, and from which a separator sheet 122 covering the electrode 11 and stacked with the electrode 11 is unwound; a table 16 on which the electrode 11 and the separator sheet 122 are seated; and a separator guide 125 for guiding the folding direction of the separator sheet 122; It includes a pair of upper nozzles 17 for applying adhesive positioned between the table 16 and the membrane guide 125 .
- the electrode reels 111 and 112 are examples of the electrode supply unit described above, and the separator reel 121 may be an example of the separator supply unit described above. Also, the pair of upper nozzles 17 may be an example of the upper applicator described above.
- the electrode reels 111 and 112 include a first electrode reel 111 from which a first electrode sheet 1111 on which a plurality of first electrodes 1112 are formed is unwound; and a second electrode reel 112 on which the second electrode sheet 1121 on which the plurality of second electrodes 1122 are formed is unwound.
- the electrode reels 111 and 112 are reels on which the electrode sheets 1111 and 1121 are wound, and the electrode sheets 1111 and 1121 are unwound from the electrode reels 111 and 112 . Then, the electrode 11 is formed by cutting the electrode sheets 1111 and 1121 . More specifically, according to this embodiment, the first electrode reel 111 is a reel on which the first electrode sheet 1111 is wound, and the first electrode sheet 1111 is unwound from the second electrode reel 112 . In addition, the second electrode reel 112 is a reel on which the second electrode sheet 1121 is wound, and the second electrode sheet 1121 is unwound from the second electrode reel 112 .
- the electrode sheets 1111 and 1121 may be manufactured by coating a slurry of an electrode active material, a conductive material, and a binder on an electrode current collector, and then drying and pressing the slurry.
- the manufacturing method of the electrode sheets 1111 and 1121 is not limited thereto, and any method of manufacturing the electrode sheets 1111 and 1121 generally in the related art may be included in the present embodiment.
- the first electrode sheet 1111 and the second electrode sheet 1121 may include electrode active materials having different polarities. That is, the first electrode 1112 and the second electrode 1122 may be electrodes 11 having different polarities. For example, if the first electrode 1112 is an anode, the second electrode 1122 may be a cathode. As another example, if the first electrode 1112 is a cathode, the second electrode 1122 may be an anode.
- the separator reel 121 is a reel in which the separator sheet 122 is wound, and the separator sheet 122 is unwound from the separator reel 121 . Thereafter, the separator sheet 122 is laminated with the electrode 11 formed by cutting the electrode sheets 1111 and 1121 .
- the electrode 11 and the separator sheet 122 are stacked in a Z-folding type. More specifically, in this embodiment, when the first electrode 1112 is seated on the separator sheet 122, one side is folded to cover the first electrode 1112, and when the second electrode 1122 is seated, the other side is folded. to cover the second electrode 1122.
- the separator sheet 122 may have a zigzag shape.
- the table 16 may be stacked with the electrode 11 and the separator sheet 122 seated on the upper surface. More preferably, the upper surface of the table 16 is formed substantially flat, so that the electrode 11 and the separator sheet 122 can be stably stacked.
- the table 16 may be disposed between the first electrode reel 111 and the second electrode reel 112 . More specifically, the table 16 may perform a rotational reciprocating motion between the first electrode reel 111 and the second electrode reel 112 . For example, the table 16 may rotate and reciprocate between the first electrode reel 111 and the second electrode reel 112 in an angular range of 0 degrees to 180 degrees with respect to the bottom surface. However, the rotation angle of the table 16 is not limited thereto, and may be rotated at various angles.
- the table 16 rotates and reciprocates between the first electrode reel 111 and the second electrode reel 112, so that the electrode 11 can be more quickly stacked on the table 16, while the separator Since the guide 125 can assist folding of the separator sheet 122, process speed and efficiency can be further improved.
- the electrode assembly manufacturing apparatus 1 includes a first conveying device 141 for conveying the first electrode 1112 toward the table 16; and a second transfer device 142 for transferring the second electrode 1122 toward the table 16 .
- the first transport device 141 may transport the first electrode 1112 formed by cutting the first electrode sheet 1111 unwound from the first electrode reel 111 toward the table 16 .
- the second transport device 142 may transport the second electrode 1122 formed by cutting the second electrode sheet 1121 unwound from the second electrode reel 112 toward the table 16 .
- the first electrode 1112 and the second electrode 1122 can be transferred to both sides of the table 16 through the first transfer device 141 and the second transfer device 142, respectively. It may be easy to alternately stack the first electrode 1112 and the second electrode 1122 on the separator sheet 122 .
- the table 16 rotates and reciprocates between the first electrode reel 111 and the second electrode reel 112
- the table 16 moves between the first transfer device 141 and the second electrode reel 141. It may be rotated adjacent to each transport device 142 . Accordingly, in this embodiment, the electrodes 11 transferred from the first transfer device 141 and the second transfer device 142 can be quickly stacked on the table 16 .
- the electrode assembly manufacturing apparatus 1 may include headers 151a and 152a for adsorbing the electrode 11 and seating the electrode 11 on the separator sheet 122 . More specifically, the headers 151a and 152a adsorb the first header 151a and the second electrode 1122, which adsorb the first electrode 1112 to be seated on the separator sheet 122, and form a barrier to the separator sheet 122. A second header 152a for seating may be further included.
- first header 151a and the second header 152 may each rotate and reciprocate in a direction positioned on the table 16 . More specifically, the first header 151a and the second header 152a may rotate and reciprocate in a direction facing the upper surface of the table 16 .
- first header 151a may adsorb the first electrode 1112 transferred from the first transfer device 141 toward the table 16, and the second header 152 may adsorb the second transfer device.
- the second electrode 1122 transferred toward the table 16 may be adsorbed.
- the table 16 is rotated adjacent to the first conveying device 141 and the second conveying device 142, respectively, and the first header 151a and the second header 152a are the table It can rotate and reciprocate toward (16).
- the first header 151a and the second header 152a can move the electrode 11 upward of the table 16 that rotates and reciprocates, and the electrode is attached to the separator sheet 122. (11) can be stably settled.
- the headers 151a and 152a measure whether the first electrode 1112 or the second electrode 1122 is distorted for each first electrode 1112 or the second electrode 1122, and then correct the position as necessary. , It can be accurately seated in a desired position on the separator sheet 122 located on the table 16. Accordingly, in the present embodiment, the degree of alignment between the electrodes 11 and the separator sheet 122 stacked and aligned on the table 16 can be further improved.
- the electrode 11 may be seated on the separator sheet 122 in a state in which an adhesive is applied to at least a part of the lower portion of the electrode 11. there is. More specifically, in this embodiment, the adhesive is applied to at least a part of the lower portion of the electrode 11 when positioned on the transfer devices 141 and 142, or the electrode 11 when adsorbed to the headers 151a and 152a. An adhesive may be applied to at least a part of the lower part of the.
- FIG. 3 is a schematic view showing a state in which an adhesive is applied to a lower portion of a first electrode in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
- FIG. 4 is a schematic view showing the state of applying an adhesive to the lower part of the first electrode in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.
- the electrode assembly manufacturing apparatus 1 may include a lower nozzle 173 for applying adhesive to at least a part of the lower portion of the first electrode 1112 . More specifically, the lower nozzle 173 may apply adhesive to at least a part of the lower surface of the first electrode 1112 . Accordingly, the first adhesive layer 1710 may be formed on the lower surface of the first electrode 1112 .
- the lower nozzle 173 may be an example of a lower applicator.
- the lower nozzle 173 may apply an adhesive to at least a part of the lower portion of the first electrode.
- the first transfer device 141a includes a first groove 141a' open toward the first electrode 1112, and the lower nozzle 173 passes through the first groove 141a'.
- An adhesive may be applied to at least a part of the lower portion of the first electrode 1112 .
- at least one first groove 141a' may be formed, and a plurality of first grooves 141a' may be spaced apart from each other.
- the first groove 141a′ may extend along the width direction of the first electrode 1112, but is not limited thereto and may extend in various directions.
- the first electrode 1112 is described as an example, and the second electrode 1122 may be equally described as the second header 152a or the second transfer device 142 .
- the electrode assembly manufacturing apparatus 1 can apply an adhesive to at least a part of the lower part of the electrode 11 during the transfer process of the electrode 11, thereby improving the convenience and speed of the process.
- an adhesive to at least a part of the lower part of the electrode 11 during the transfer process of the electrode 11, thereby improving the convenience and speed of the process.
- the adhesive is uniformly applied to the lower portion of the electrode 11 .
- the amount of adhesive applied may be excessive.
- the adhesive may flow to the outside of the separator sheet 122 and contaminate other parts, and the function of generating power when the secondary battery is manufactured may not be smooth.
- the adhesive may be preferable to apply the adhesive to the lower portion of the electrode 11 in a spot application method in a dot form or a line application method in a line form. That is, the first adhesive layer 1710 may be formed in a spot pattern or a line pattern.
- the electrode 11 is still not fixed to the separator sheet 122 while the cell moves, and may be detached from its original position. Therefore, it may be desirable that the spacing of the area where the adhesive is applied is not excessively wide.
- the adhesive may be applied to the surface of the electrode 11 in a minimum amount capable of securing adhesion between the electrode 11 and the separator sheet 122 .
- the separator sheet 122 absorbs some of the adhesive, so that the adhesive strength between the electrode 11 and the separator sheet 122 is secured. There is a problem of applying a large amount of adhesive.
- the adhesive may be dissolved in an electrolyte solution. More specifically, when the first adhesive layer 1710 formed below the electrode 11 is impregnated with an electrolyte solution, the adhesive included in the first adhesive layer 1710 may be dissolved in the electrolyte solution.
- dissolving the adhesive may mean melting the adhesive into the electrolyte. That is, the area of the first adhesive layer 1710 formed under the electrode 11 is reduced, or the first adhesive layer 1710 is completely removed, so that the first adhesive layer 1710 does not remain under the electrode 11. that can mean
- the adhesive may be an acrylate-based adhesive. Accordingly, in this embodiment, as the acrylate-based adhesive is applied to the lower portion of the electrode 11 as the adhesive, the adhesive may be dissolved into the electrolyte solution included in the final battery cell.
- the first adhesive layer 1710 fixes the electrode 11 to the separator sheet 122 during the manufacturing process, thereby preventing the electrode 11 from being moved out of position.
- the first adhesive layer 1710 is dissolved in the electrolyte solution included in the final battery cell, the movement of lithium ions between the electrode and the separator may not be hindered, and battery cell performance may be further improved.
- FIG. 5 and 6 show that in the apparatus for manufacturing an electrode assembly according to an embodiment of the present invention, the table rotates, the separator guide and the first upper nozzle linearly move, and the first upper nozzle rotates to reach the second area. It is a schematic diagram showing the state of applying the adhesive.
- a pair of upper nozzles 17 apply adhesive to at least a portion of the separator sheet 122 positioned between the table 16 and the separator guide 125. More specifically, the pair of upper nozzles 17 include a first upper nozzle 171 for applying adhesive to at least a part of the second region 1222 of the separator sheet 122 and the first region of the separator sheet 122 A second upper nozzle 172 for applying adhesive to at least a portion of 1221 .
- the first region 1221 of the separator sheet 122 refers to a region of the separator sheet 122 to which the first electrode 1112 is attached. In some cases, the first region 1221 refers to a region of the separator sheet 122 to which the first electrode 1112 is attached while covering the second electrode 1122 . Also, the second region 1222 refers to a region of the separator sheet 122 to which the second electrode 1122 is attached while covering the first electrode 1112 . In other words, the first electrode 1112 is seated on the first region 1221 of the separator sheet 122, and the second electrode 1122 is seated on the second region 1222 of the separator sheet 122. can
- the first upper nozzle 171 may apply the adhesive to the surface covering the first electrode 1112 in the second region 1222 of the separator sheet 122 . That is, the first upper nozzle 171 may apply the adhesive to the surface opposite to the surface to which the second electrode 1122 is attached in the second area 1222 of the separator sheet 122 .
- the second upper nozzle 172 may apply the adhesive to a surface covering the second electrode 1122 in the first region 1221 of the separator sheet 122 . That is, the second upper nozzle 172 may apply the adhesive to the surface opposite to the surface to which the first electrode 1112 is attached in the first region 1221 of the separator sheet 122 .
- first upper nozzle 171 and the second upper nozzle 172 may be disposed on both sides with the separator sheet 122 interposed therebetween. That is, the first upper nozzle 171 applies an adhesive to at least a part of the second region 1222 before the second region 1222 of the separator sheet 122 covers the upper portion of the first electrode 1112.
- a second adhesive layer 1750 may be formed.
- the second upper nozzle 172 covers the first area 1221 before the first area 1221 of the separator sheet 122 covers the upper part of the second electrode 1122 .
- An adhesive may be applied to at least a portion of the second adhesive layer 1750 .
- the pair of upper nozzles 17 may linearly reciprocate left and right with respect to the table 16 . That is, while the pair of upper nozzles 17 linearly move in a direction from one side of the table 16 to the other side or in the opposite direction, the first area 1221 or the second area 1222 of the separator sheet 122 An adhesive may be applied to at least a portion of the
- the first upper nozzle 171 It may linearly move on the second area 1222 of the separator sheet 122 .
- the first upper nozzle 171 may apply the adhesive to at least a part of the second area 1222 while linearly moving in a direction away from the table 16 .
- the second upper nozzle 172 is installed on the separator sheet 122. It can move linearly on the first region 1221 .
- the second upper nozzle 172 may apply the adhesive to at least a part of the first region 1221 while linearly moving in a direction away from the table 16 .
- the description of the adhesive applied from the pair of upper nozzles 17 may be the same as the adhesive applied from the lower nozzle 173 described above.
- the pair of upper nozzles 17 may reciprocate left and right simultaneously or individually with respect to the table 16 . More preferably, the pair of upper nozzles 17 can reciprocate left and right simultaneously with respect to the table 16 .
- the first upper nozzle 171 applies the adhesive from one side to the other side of the first area 1221 located on the right side of the table 16
- the second upper nozzle 172 may apply the adhesive from one side of the second area 1222 located on the left side of the table 16 to the other side.
- the process time of the adhesive application process of the pair of upper nozzles 17 can be reduced.
- process efficiency can be further improved.
- the gap between the pair of upper nozzles 17 and the separator sheet 122 may be changed. Accordingly, the application interval and/or the application amount of the adhesive applied to the separator sheet 122 from the pair of upper nozzles 17 may become non-uniform.
- the end of the first upper nozzle 171 when the pair of upper nozzles 17 respectively apply the adhesive on the separator sheet 122, the end of the first upper nozzle 171 Alternatively, the end of the second upper nozzle 172 may rotate in a direction adjacent to the separator sheet 122 .
- the pair of upper nozzles 17 may rotate in a direction in which an end of the first upper nozzle 171 or an end of the second upper nozzle 172 faces the upper surface of the separator sheet 122 .
- the angle between the end of the first upper nozzle 171 or the end of the second upper nozzle 172 and the upper surface of the separator sheet 122 may be adjusted.
- the pair of upper nozzles 17 are rotated so that the angle between the end of the first upper nozzle 171 or the end of the second upper nozzle 172 and the upper surface of the separator sheet 122 is constant.
- the rotation angle of the pair of upper nozzles 17 is not limited thereto, and any angle at which the adhesive application interval becomes uniform may be included in the present embodiment.
- the end of the first upper nozzle 171 or the end of the second upper nozzle 172 is in contact with the separator sheet 122. Positions may move in the direction of adjacency.
- the pair of upper nozzles 17 are moved so that the height difference between the end of the first upper nozzle 171 or the end of the second upper nozzle 172 and the upper surface of the separator sheet 122 is constant. can be regulated.
- the position of the pair of upper nozzles 17 is not limited thereto, and any position where the adhesive application interval becomes uniform may be included in this embodiment.
- the application interval and / or the application amount of the adhesive applied from the pair of upper nozzles 17 can be made more uniform, , the quality can also be further improved.
- FIG. 7 is a schematic view showing a state in which a second region to which an adhesive is applied covers a first electrode while a separator guide linearly moves in an opposite direction in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention.
- the separator sheet 122 may be guided in a folding direction by a separator guide 125 . More specifically, the membrane guide 125 may rectilinearly reciprocate left and right with respect to the table 16 .
- the separator guide 125 may have a shape in which a pair of rolls are arranged horizontally, and a separator sheet 122 may be inserted between the pair of rolls.
- the shape of the separator guide 125 is not limited thereto, and any shape capable of controlling the folding direction of the separator sheet 122 may be included in the present embodiment.
- the membrane guides 125 may be located at upper and lower portions of the pair of upper nozzles 17 , respectively.
- the position and number of the separator guides 125 are not limited thereto, and any position and number capable of controlling the folding direction of the separator sheet 122 may be included in this embodiment.
- the membrane guide 125 simultaneously reciprocates left and right with respect to the table 16 together with the pair of upper nozzles 17, or the membrane guide 125 and the pair of upper nozzles 17 move left and right, respectively. can reciprocate.
- the first upper nozzle 171 applies the adhesive to at least a part of the second region 1222 of the separator sheet 122, and the separator guide 125 applies the adhesive to the second electrode reel 112 Alternatively, it moves linearly in a direction toward the second transfer device 142 .
- the second upper nozzle 172 applies the adhesive to at least a part of the first region 1221 of the separator sheet 122, the separator guide 125 It can linearly move in a direction toward the electrode reel 111 or the first transfer device 141 .
- the separator guide 125 forms an area in the separator sheet 122 where the adhesive can be applied from the first upper nozzle 171 or the second upper nozzle 172, so that the separator guide 125 is a pair of It can assist the adhesive application process of the upper nozzle 17 of the.
- the separator sheet 122 moves along the separator guide 125. Folded along the moving direction of , the separator sheet 122 may cover the electrode 11 .
- the separator guide 125 is directed toward the first transfer device 141.
- the second region 1222 of the separator sheet 122 may cover the upper portion of the first electrode 1112 .
- the separator guide 125 when the adhesive application of the first upper nozzle 171 is completed, the separator guide 125, as shown in FIG. It moves linearly in a direction covering the first electrode 1112 .
- the separator guide 122 covers the second electrode 1122 with the first region 1221 of the separator sheet 122 to which the adhesive is applied. move in a straight line in the direction
- the separator guide 125 assists the adhesive application process of the pair of upper nozzles 17, and can perform the folding process of the separator sheet 122, thereby reducing the process time, Process efficiency can be further improved.
- FIG. 8 is a schematic diagram showing a state in which a second electrode is seated on a second region of a separator sheet in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
- the table 16 is a second electrode reel 112 or a second transfer device It can rotate and reciprocate toward (142).
- the second electrode 1122 may be adsorbed to the second header 152a to perform a rotational reciprocating motion.
- the second header 152a may be rotated so as to be positioned above the table 16 .
- the second electrode 1122 may be seated on the second region 1222 of the separator sheet 122 .
- descriptions of the second electrode 1122 and the second header 152a may be the same as those of the first upper nozzle 171 described above.
- the second upper nozzle 172 may linearly reciprocate with respect to the table 16 .
- the adhesive is applied to at least a part of the first area 1221.
- the description of the second upper nozzle 172 may be the same as that of the first upper nozzle 171 described above.
- a unit cell manufacturing method according to an embodiment of the present invention may be performed as follows.
- the first cutter 131 cuts the first electrode sheet 1111, and A first electrode 1112 is formed (S101).
- the separator sheet 122 is unwound from the separator reel 121, it is placed on the upper surface of the table 16 (S102). At this time, the table 16 may rotate toward the first electrode reel 111 or the first transfer device 141 in a state where the separator sheet 122 is seated.
- the lower nozzle 173 applies an adhesive to the lower portion of the first electrode 1112 (S103).
- the lower nozzle applies the adhesive to the lower portion of the first electrode 1112 in a state in which the first header 151a adsorbs the first electrode 1112 .
- the lower nozzle 173 applies the adhesive to the lower portion of the first electrode 1112.
- the first header 151a may rotate and move onto the table 16 while the first electrode 1112 is attached thereto. And, when the first header 151a is positioned above the table 16, as shown in FIG. 2 , the first header 151a is attached to the first area 1221 of the separator sheet 122 as a first adhesive layer. The first electrode 1112 on which 1710 is formed is seated (S104).
- the first upper nozzle 171 moves the separator sheet 122
- An adhesive may be applied to the second region 1222 of (S105).
- the second adhesive layer 1750 may be formed on the second region 1222 of the separator sheet 122 .
- the membrane guide 125 and the first upper nozzle 171 may linearly move together.
- the second cutter 132 cuts the second electrode sheet 1121 . Then, a plurality of second electrodes 1122 are formed.
- the second transfer device 142 transfers the second electrode 1122
- the second header 152a adsorbs the second electrode 1122.
- a first adhesive layer 1710 formed by applying an adhesive from the lower nozzle 173 may be positioned below the second electrode 1122 .
- the table 16 rotates toward the second electrode reel 112 or the second transfer device 142 in a state where the second region 1222 of the separator sheet 122 is seated. can At this time, when the second region 1222 of the separator sheet 122 covers the first electrode 1112, the second header 152a adsorbing the second electrode 1122 is the second region 1222. The second electrode 1122 is seated on the upper portion of the second region 1222 by moving toward an upper portion of the second region 1222 .
- the second upper nozzle 172 applies the adhesive to the first region 1221 of the separator sheet 122 .
- the second adhesive layer 1750 may be formed on the first region 1221 of the separator sheet 122 .
- the membrane guide 125 and the second upper nozzle 172 may linearly move together.
- the separator guide 125 moves in a direction toward the second transport device 142, The other side of the sheet 122 is folded so that the first region 1221 of the separator sheet 122 covers the second electrode 1122 .
- the electrode assembly manufacturing method according to an embodiment of the present invention may be performed by repeating the above processes.
- the electrode assembly manufacturing method according to the embodiments of the present invention when the electrode 11 and the separator sheet 122 are stacked in a Z-folding type, the adhesive is applied to the upper and lower portions of the electrode 11, respectively. As a result, it is possible to prevent the electrode 11 from departing from its proper position.
- FIG. 9 is an exploded perspective view of a battery cell according to an embodiment of the present invention.
- the electrode 11 includes a first electrode 1112 and a second electrode. 1122, and the separator sheet 122 has a zigzag shape formed by folding at least twice.
- the separator sheet 122 is folded in a state where the first electrode 1112 is seated on the first region 1221 of the separator sheet 122, so that the second region 1222 of the separator 122 is the first region 1221 of the separator sheet 122.
- the electrode 11 is covered.
- the second electrode 1122 is seated on the second region 1222 of the separator sheet 122 and is folded so that the first region 1221 of the separator sheet 122 covers the second electrode 1122.
- the electrodes 11 may be stacked one by one on the first region 1221 or the second region 1222 of the separator sheet 122 .
- the electrode 11 may be stacked at an accurate position on the separator sheet 122 in a state where the position is corrected as necessary after measuring whether or not the electrode 11 is distorted. Accordingly, in the electrode assembly 10 according to the present embodiment, the degree of alignment between the electrode 11 and the separator sheet 122 may be further improved.
- an adhesive layer 1700 is formed between the electrode 11 and the separator sheet 122 . More specifically, the adhesive layer 1700 includes a first adhesive layer 1710 and a second adhesive layer 1750 .
- the first adhesive layer 1710 may be positioned between the lower portion of the electrode 11 and the separator sheet 122
- the second adhesive layer 1750 may be positioned between the upper portion of the electrode 11 and the separator sheet 122.
- each of the first adhesive layer 1710 and the second adhesive layer 1750 may be formed by applying an adhesive in the form of a plurality of dots.
- the shapes of the first adhesive layer 1710 and the second adhesive layer 1750 are not limited thereto, and may be formed in various shapes.
- the adhesive layer 1700 is formed between the electrode 11 and the separator sheet 122, so that even in the case of a low-cost separator having an excessively low adhesive strength, the electrode 11 and the Since the separation membranes can be stably fixed to each other, it is possible to prevent the electrode 11 from being separated from its original position.
- the electrode assembly 10 of this embodiment covers the top and bottom of the electrode 11 in a form in which one separator sheet 122 is folded, so that the alignment of the electrode 11 and the efficiency of the process are further improved. It can be.
- the rate of defects in the process caused by high heat and pressure can be reduced.
- the laminator can be removed, the volume of the manufacturing device can be reduced and the manufacturing process can be simplified.
- a separator according to an embodiment described herein may be a Ceramic Coated Separator (CCS).
- the separator has a raw film and a coating layer formed on at least one surface of the raw film, and the coating layer may include alumina powder and a binder to aggregate them.
- SRS Safety Reinforced Separator
- a large amount of binder is coated on the surface of the coating layer, but in CCS, the binder may not be coated on the surface of the coating layer, or the binder content distributed on the surface may be very low compared to SRS.
- the content of the binder coated on the surface of the coating layer of the separator may be about 3 wt% or less.
- the content of the binder coated on the surface of the coating layer of the separator may be about 2wt% or less or about 1wt% or less.
- the separator is a CCS
- the separator since the internal electrodes included in the electrode assembly are transported in an unfixed state, alignment may be disturbed during transport.
- the separator may be fixed with heat and pressure, but the alignment of the internal electrodes may be disturbed even in the process of forming a stack of electrodes and separators and transferring them to a heat and pressure fixing device.
- an expensive separator having a high binder content must be used in order to attach the electrode and the separator with heat and pressure.
- it is possible to increase the fixing force while preventing the alignment of the internal electrodes from being disturbed during transportation.
- FIG. 10 is an exploded perspective view of a battery cell according to an embodiment of the present invention.
- a battery cell according to another embodiment of the present invention is a battery cell including the electrode assembly 10 described above, which accommodates the electrode assembly 10 together with an electrolyte.
- a battery case 50 is included, and an adhesive layer 1700 is dissolved in the electrolyte.
- a fixing member such as a fixing tape 30 may be attached to the outside of the electrode assembly 10 . Accordingly, the stack alignment of the electrode 11 and the separator sheet 122 may be maintained.
- the electrode assembly 10 to which the fixing tape 30 is attached may be referred to as a final electrode assembly 20.
- the battery case 50 includes an accommodating part 60 in which the electrode assembly 10 or the final electrode assembly 20 is mounted and a sealing part 70 sealing the outer periphery of the accommodating part 60 .
- the battery case 50 may be a laminate sheet including a resin layer and a metal layer. More specifically, the battery case 50 is made of a laminate sheet, and may be composed of an outer resin layer constituting the outermost shell, a barrier metal layer preventing penetration of materials, and an inner resin layer for sealing.
- the storage part 60 of the battery case 50 may accommodate the electrolyte solution together with the electrode assembly 10 .
- the adhesive layer 1700 included in the electrode assembly 10 may be dissolved into the electrolyte.
- the adhesive layer 1700 included in the electrode assembly 10 in an activation process such as a formation process, may be dissolved into the electrolyte under high temperature and/or pressurized conditions.
- the adhesive layer 1700 formed between the electrode 11 of the electrode assembly 10 and the separator sheet 122 is dissolved into the electrolyte, the surface of the electrode 11 Little or all of the adhesive 14 may remain.
- the separator sheet 122 is generally a porous sheet, a portion of the adhesive 14 may permeate the separator sheet 122 .
- the adhesive layer 1700 that penetrates the separator sheet 122 most or all of it may be dissolved in the electrolyte, and in this process, traces of the application of the adhesive layer 1700 may remain on the separator sheet 122. there is.
- the application traces of the adhesive layer 1700 may mean that some of the outer surface of the separator sheet 122 is deformed by the adhesive layer 1700, although the adhesive component included in the adhesive layer 1700 does not remain.
- the application traces of the adhesive layer 1700 may mean traces that can be used to check whether the adhesive has been applied in various ways, such as traces that can be visually confirmed whether or not the adhesive has been applied. Accordingly, the application trace of the adhesive layer 1700 formed on the separator sheet 122 may be formed at the same location as the location where the adhesive is applied.
- the adhesive layer 1700 is completely dissolved on the surface of the electrode 11 or the separator 122, and the unreacted area due to the adhesive layer 1700 disappears, preventing performance degradation and excellent battery performance. this can be implemented.
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Abstract
Description
Claims (20)
- 복수의 제1 전극이 형성되는 제1 전극 시트가 제공되는 제1 전극 공급 유닛;복수의 제2 전극이 형성되는 제2 전극 시트가 제공되는 제2 전극 공급 유닛;상기 제1 전극 또는 상기 제2 전극이 안착하면 폴딩되어, 상기 제1 전극 또는 상기 제2 전극을 커버하며 상기 제1 전극 또는 상기 제2 전극과 적층되는 분리막 시트가 제공되는 분리막 공급 유닛;전극 조립체를 형성하기 위해, 상기 제1 전극과 상기 제2 전극 사이에 폴딩되는 상기 분리막 시트를 갖도록 상기 제1 전극 및 상기 제2 전극을 상면에 안착하는 테이블;상기 분리막 시트의 폴딩 방향을 가이드하는 분리막 가이드; 및상기 테이블과 상기 분리막 가이드 사이에 위치하는 상기 분리막 시트의 적어도 일부에 접착제를 도포하는 한 쌍의 상부 도포기를 포함하고,상기 테이블은 상기 제1 전극 공급 유닛과 상기 제2 전극 공급 유닛 사이에서 회전 왕복 운동하고,상기 분리막 가이드 및 상기 한 쌍의 상부 도포기는 상기 테이블을 기준으로 좌우로 직선 왕복 운동하는 전극 조립체 제조 장치.
- 제1항에서,상기 제1 전극은 상기 분리막 시트의 제1 영역 상에 안착하고,상기 제2 전극은 상기 분리막 시트의 제2 영역 상에 안착하는 전극 조립체 제조 장치.
- 제2항에서,상기 한 쌍의 상부 도포기는 제1 상부 노즐 및 제2 상부 노즐을 포함하고,상기 제1 상부 노즐은 상기 분리막 시트의 제2 영역 중 적어도 일부에 상기 접착제를 도포하고,상기 제2 상부 노즐은 상기 분리막 시트의 제1 영역 중 적어도 일부에 상기 접착제를 도포하는 전극 조립체 제조 장치.
- 제3항에서,상기 한 쌍의 상부 도포기가 각각 상기 분리막 시트 상에 접착제를 도포할 때, 상기 제1 상부 노즐의 단부 또는 상기 제2 상부 노즐의 단부는 상기 분리막 시트와 인접해지는 방향으로 회전 운동하는 전극 조립체 제조 장치.
- 제3항에서,상기 제1 상부 노즐 및 상기 제2 상부 노즐은 상기 분리막 가이드를 사이에 두고 양 측에 배치되는 전극 조립체 제조 장치.
- 제3항에서,상기 제1 전극이 상기 분리막 시트의 제1 영역 상에 안착하는 것과 동시에, 상기 제1 상부 노즐은 상기 분리막 시트의 제2 영역 상에서 직선 이동하고,상기 제2 전극이 상기 분리막 시트의 제2 영역 상에 안착하는 것과 동시에, 상기 제2 상부 노즐은 상기 분리막 시트의 제1 영역 상에서 직선 이동하는 전극 조립체 제조 장치.
- 제6항에서,상기 분리막 시트의 제2 영역 중 적어도 일부에 상기 제1 상부 노즐이 상기 접착제를 도포함과 동시에, 상기 분리막 가이드는 상기 제2 전극 공급 유닛을 향하는 방향으로 직선 이동하고,상기 분리막 시트의 제1 영역 중 적어도 일부에 상기 제2 상부 노즐이 상기 접착제를 도포함과 동시에, 상기 분리막 가이드는 상기 제1 전극 공급 유닛을 향하는 방향으로 직선 이동하는 전극 조립체 제조 장치.
- 제7항에서,상기 제1 상부 노즐의 접착제 도포가 완료되면, 상기 분리막 가이드는 상기 접착제가 도포된 상기 분리막 시트의 제2 영역이 상기 제1 전극을 커버하는 방향으로 직선 이동하고,상기 제2 상부 노즐의 접착제 도포가 완료되면, 상기 분리막 가이드는 상기 접착제가 도포된 상기 분리막 시트의 제1 영역이 상기 제2 전극을 커버하는 방향으로 직선 이동하는 전극 조립체 제조 장치.
- 제1항에서,상기 제1 전극의 하부 및 상기 제2 전극의 하부에 각각 상기 접착제를 도포하는 하부 도포기를 포함하는 전극 조립체 제조 장치.
- 제9항에서,상기 제1 전극을 흡착하여 상기 제1 영역에 안착시키는 제1 헤더; 및상기 제2 전극을 흡착하여 상기 제2 영역에 안착시키는 제2 헤더를 더 포함하고,상기 제1 헤더 및 상기 제2 헤더는 상기 테이블 상에 위치하는 방향으로 회전 왕복 운동하는 전극 조립체 제조 장치.
- 제10항에서,상기 제1 헤더에 상기 제1 전극이 흡착되면, 상기 하부 도포기는 상기 제1 전극의 하부에 상기 접착제를 도포하고,상기 제2 헤더에 상기 제2 전극이 흡착되면, 상기 하부 도포기는 상기 제2 전극의 하부에 상기 접착제를 도포하는 전극 조립체 제조 장치.
- 제9항에서,상기 제1 전극을 상기 테이블을 향해 이송하는 제1 이송 장치; 및상기 제2 전극을 상기 테이블을 향해 이송하는 제2 이송 장치를 더 포함하는 전극 조립체 제조 장치.
- 제12항에서,상기 제1 이송 장치는 상기 제1 전극을 향해 개방되어 있는 제1 홈을 포함하여, 상기 하부 도포기가 상기 제1 홈을 통해 상기 제1 전극의 하부에 상기 접착제를 도포하고,상기 제2 이송 장치는 상기 제2 전극을 향해 개방되어 있는 제2 홈을 포함하여, 상기 하부 도포기가 상기 제2 홈을 통해 상기 제2 전극의 하부에 상기 접착제를 도포하는 전극 조립체 제조 장치.
- 제1 전극 공급 유닛으로부터 제공된 제1 전극 시트를 절단하여 복수의 제1 전극을 형성하는 단계;분리막 공급 유닛으로부터 제공된 분리막 시트가 분리막 가이드를 따라 테이블에 안착하는 단계;상기 제1 전극의 하부에 하부 도포기가 접착제를 도포하는 단계;상기 제1 전극을 상기 분리막 시트의 제1 영역에 안착하는 단계;상기 분리막 시트의 제2 영역 중 적어도 일부에 제1 상부 노즐이 접착제를 도포하는 단계; 및분리막 가이드에 의해 가이드되는 폴딩 방향으로 상기 분리막 시트가 폴딩되어, 상기 접착제가 도포된 상기 분리막 시트의 제2 영역이 상기 제1 전극을 커버하는 단계를 포함하는 전극 조립체 제조 방법.
- 제14항에서,상기 제1 전극의 상부를 커버하는 단계 이후에,제2 전극 공급 유닛으로부터 제공된 제2 전극 시트를 절단하여 복수의 제2 전극을 형성하는 단계;상기 제2 전극의 하부에 하부 도포기가 접착제를 도포하는 단계;상기 제2 전극을 상기 분리막 시트의 제2 영역에 안착하는 단계;상기 분리막 시트의 제1 영역 중 적어도 일부에 제2 상부 노즐이 접착제를 도포하는 단계; 및상기 분리막 가이드에 의해 가이드되는 폴딩 방향으로 상기 분리막 시트가 폴딩되어, 상기 접착제가 도포된 상기 분리막 시트의 제1 영역이 상기 제2 전극을 커버하는 단계를 더 포함하는 전극 조립체 제조 방법.
- 제15항에서,상기 테이블은 상기 제1 전극 공급 유닛과 상기 제2 전극 공급 유닛 사이에서 회전 왕복 운동하고,상기 분리막 가이드 및 상기 한 쌍의 상부 도포기는 상기 테이블을 기준으로 좌우로 직선 왕복 운동하는 전극 조립체 제조 방법.
- 제16항에서,상기 제1 상부 노즐이 접착제를 도포하는 단계 및 상기 제2 상부 노즐이 접착제를 도포하는 단계에 있어서,상기 제1 상부 노즐의 단부 또는 상기 제2 상부 노즐의 단부는 상기 분리막 시트와 인접해지는 방향으로 회전 운동하는 전극 조립체 제조 방법.
- 전극 및 분리막 시트가 교대로 적층되어 있는 전극 조립체로서,상기 전극은 제1 전극 및 제2 전극을 포함하고,상기 분리막 시트는 적어도 2회 폴딩됨으로써 형성된 지그 재그 형태를 가지고,상기 분리막 시트는 상기 분리막 시트의 제1 영역 상에 상기 제1 전극이 안착된 상태에서 폴딩되어 상기 분리막 시트의 제2 영역이 상기 제1 전극을 커버하고 있고, 상기 제2 영역 상에 상기 제2 전극이 안착된 상태에서 폴딩되어 상기 분리막 시트의 제1 영역이 상기 제2 전극을 커버하고 있고,상기 전극과 상기 분리막 시트 사이에 접착층이 형성되어 있으며,상기 접착층은, 전지셀에서 사용을 위해 전해액에 용해되는 전극 조립체.
- 제18항에서,상기 접착층은 제1 접착층 및 제2 접착층을 포함하고,상기 제1 접착층은 상기 전극의 하부와 상기 분리막 시트 사이에 위치하고,상기 제2 접착층은 상기 전극의 상부와 상기 분리막 시트 사이에 위치하는 전극 조립체.
- 제18항의 전극 조립체를 포함하는 전지 셀로서,전해액과 함께 상기 전극 조립체를 수용하는 전지 케이스를 포함하고,상기 접착층은 상기 전해액에 용해되는 전지 셀.
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KR20120060325A (ko) * | 2010-12-02 | 2012-06-12 | 주식회사 나래나노텍 | 전극 공급 장치 및 방법, 및 이를 구비한 전극 적층 장치 및 방법 |
JP2017050215A (ja) * | 2015-09-03 | 2017-03-09 | 日産自動車株式会社 | リチウムイオン二次電池の製造方法 |
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