WO2022086141A1 - 전극 조립체의 제조방법 및 상기 전극 조립체를 포함하는 전기화학소자 - Google Patents
전극 조립체의 제조방법 및 상기 전극 조립체를 포함하는 전기화학소자 Download PDFInfo
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- WO2022086141A1 WO2022086141A1 PCT/KR2021/014629 KR2021014629W WO2022086141A1 WO 2022086141 A1 WO2022086141 A1 WO 2022086141A1 KR 2021014629 W KR2021014629 W KR 2021014629W WO 2022086141 A1 WO2022086141 A1 WO 2022086141A1
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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- 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
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- 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
- H01M10/0404—Machines for assembling batteries
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- 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
- H01M10/0431—Cells with wound or folded electrodes
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- 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
- H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- 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
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
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- 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
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- 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 a method of manufacturing an electrode assembly and an electrochemical device including the electrode assembly. More particularly, it relates to a method of manufacturing an electrode assembly having improved impregnation characteristics and air permeability characteristics for an electrolyte, and an electrochemical device including the electrode assembly and having improved battery performance.
- Electrochemical device is the field that is receiving the most attention in this aspect, and in particular, in accordance with the recent trend of miniaturization and weight reduction of electronic devices, the development of secondary batteries as small, lightweight and high-capacity rechargeable batteries is the focus of interest.
- secondary batteries are classified according to the structure of the electrode assembly having the positive electrode/separator/negative electrode structure.
- the secondary battery is a jelly having a long sheet-type positive electrode and negative electrode wound up with a separator interposed therebetween.
- It is divided into a roll (winding type) electrode assembly and a stack type (stacked type) electrode assembly in which a plurality of positive and negative electrodes cut in units of a predetermined size are sequentially stacked with a separator interposed therebetween.
- the jelly-roll electrode assembly is made into a cylindrical or elliptical structure in cross-section by winding the long sheet-shaped positive and negative electrodes in a dense state, the stress caused by the expansion and contraction of the electrode during charging and discharging accumulates inside the electrode assembly. When the stress accumulation exceeds a certain limit, deformation of the electrode assembly occurs. Due to the deformation of the electrode assembly, the gap between the electrodes becomes non-uniform, causing a problem in that the performance of the battery is rapidly deteriorated and the safety of the battery is threatened due to an internal short circuit. In addition, since the long sheet-shaped positive electrode and the negative electrode need to be wound, it is difficult to quickly wind the positive electrode and the negative electrode while maintaining a constant distance between the positive electrode and the negative electrode, so there is a problem in that productivity is reduced.
- the existing lamination technology achieves adhesion by rolling the entire interface between the electrode and the separator at high temperature. A physical shock was applied to
- an object of the present invention is to provide a method for manufacturing an electrode assembly that improves problems caused by interfacial adhesion between an electrode and a separator, and an electrochemical device including the electrode assembly.
- the present invention provides a method for manufacturing an electrode assembly of the following embodiments and an electrochemical device including the electrode assembly.
- an electrode assembly comprising a; winding so that the second separator is interposed between the preliminary electrode assemblies.
- An electrode comprising a; passing through a second separator on which the preliminary electrode assemblies are disposed between a pair of rollers having a patterned surface and pressing the second separator, and then winding the second separator to be interposed between the preliminary electrode assemblies.
- An electrode comprising a; passing through a second separator on which the preliminary electrode assemblies are disposed between a pair of rollers having a patterned surface and pressing the second separator, and then winding the second separator to be interposed between the preliminary electrode assemblies.
- a pair of rollers with a patterned surface may be formed by engraving a pattern on the surface of the roller, or may be formed by attaching a pattern plate to the surface of the roller.
- the pattern may include a hexagon, a square, a triangle, a circle, a pentagon, a straight line, an oblique shape, a polygon, or two or more of these.
- An area of the pattern directly facing the electrode may be 1 to 99% of the total surface area of the roller on which the surface is patterned.
- an electrode assembly manufactured by the manufacturing method of any one of the first to third embodiments.
- an electrochemical device in which the electrode assembly of the seventh embodiment is accommodated in a case.
- the electrochemical device may be a lithium secondary battery.
- the contact area directly facing the electrode during rolling can be reduced, thereby reducing the lamination load. , adhesion can be applied with minimal stimulation.
- FIG. 1 shows a roller with a patterned surface according to an embodiment of the present invention.
- FIG. 5 illustrates a process of preparing a preliminary electrode assembly in which a plurality of first separators and electrodes are laminated according to an embodiment of the present invention.
- 6A shows a conventional rolling roller.
- 6B shows a process of preparing a preliminary electrode assembly using a conventional rolling roller.
- FIG. 7 shows a preliminary electrode assembly manufactured using a pair of rollers with a patterned surface according to an embodiment of the present invention.
- FIG 8 shows a preliminary electrode assembly manufactured using a conventional unpatterned roller.
- 9 and 10 illustrate a process of pressing the second separator through which the preliminary electrode assemblies are disposed between a pair of rollers having a patterned surface.
- FIG. 11 is a schematic cross-sectional view of an embodiment of a conventional electrode assembly.
- FIG. 12 is a schematic cross-sectional view of another embodiment of a conventional electrode assembly
- FIG. 13 is a schematic cross-sectional view of another embodiment of a conventional electrode assembly.
- FIG. 14 is a schematic cross-sectional view of a structure for a stack-folding type electrode assembly having a conventional unit cell.
- 15 is a schematic cross-sectional view of a structure for a stack-folding type electrode assembly having a conventional bi-cell.
- the present invention relates to an improved method for manufacturing an electrode assembly in order to solve problems in the conventional method for manufacturing a stack-folding type electrode assembly, and specifically, an improved method for manufacturing a stack-folding type electrode assembly and an electrode manufactured therefrom It relates to an electrochemical device including an assembly.
- the conventional stack-folding type electrode assembly manufacturing method is as follows.
- 11 to 13 are cross-sectional views schematically illustrating a structure of a stack-folding type electrode assembly.
- like numbers refer to like members.
- the electrode assemblies 10, 20, 30 are first separators 3a, 3b, 3c and cathodes 1a, 1b, located on both sides of the first separators 3a, 3b, 3c; 1c) and a plurality of unit cells 7a, 7b, 7c1, and 7c2 each having anodes 5a, 5b, and 5c.
- the positive electrodes 5a, 5b, and 5c have a structure in which positive electrode active material layers are formed on both surfaces of the positive electrode current collector, and the negative electrodes 1a, 1b and 1c have a structure in which negative electrode active material layers are formed on both surfaces of the negative electrode current collector.
- the unit cell has a structure of full cells 7a, 7b in which one positive electrode 5a, 5b and negative electrode 1a, 1b are positioned on both sides of the first separator 3a, 3b, or , a bi-cell 7c1 in which the first separator 3c is positioned on both sides of the anode 5c or the cathode 1c, respectively, and the cathode 1c or the anode 5c is positioned on each first separator 3c, respectively; 7c2) (anode/separator/cathode/separator/anode structure or cathode/separator/positive electrode/separator/cathode structure), etc., may be formed into unit cells having various structures.
- anode/separator/cathode/separator/anode structure (7c1) or the cathode/separator/positive electrode/separator/cathode structure (7c2) is collectively referred to as a bi-cell, and the anode/separator/cathode structure ( 7a, 7b, and 7c) can be collectively expressed as a mono-cell.
- each of the unit cells (7a, 7b, 7c1, 7c2) exists in a stacked form.
- each of the unit cells (7a, 7b) adjacent to each other to correspond to each other , 7c1 and 7c2), a single continuous second separator 9a, 9b, 9c disposed to surround each of the unit cells 7a, 7b, 7c1, 7c2 is shown in FIGS. 11 to 13 . It is interposed in various forms as shown to perform a separation membrane function between each of the unit cells 7a, 7b, 7c1, and 7c2.
- the stack-folding type electrode assembly manufacturing structure shown in FIG. 14 is a structure using a unit cell including a first separator and positive and negative electrodes located on both sides of the first separator, and unit cells on one surface of the second separator 1090 ( 1100, 1200, 1300, 1400, 1500) are arranged at predetermined intervals.
- a first separator is respectively located on both sides of a positive electrode or a negative electrode instead of a unit cell, and a negative electrode or a positive electrode is located on each of the first separators, respectively.
- a bi-cell structure of anode/separator/cathode/separator/anode or cathode/separator/anode/separator/cathode structure
- bi-cell structure of anode/separator/cathode/separator/anode or cathode/separator/anode/separator/cathode structure
- Bi-cells 2100 , 2200 , 2300 , 2400 , and 2500 are disposed on one surface of the second separator 2090 at predetermined intervals.
- Bi-cell (2100, 2200, 2300, 2400, 2500) has the structure of the positive electrode 2010 / first separator 2030 / negative electrode 2050 / first separator 2030 / positive electrode 2010 or the negative electrode 2050 It may have a structure of / first separator 2030 / anode 2010 / first separator 2030 / cathode 2050 .
- an electrode assembly may be manufactured from the structure using a stack-folding method. Specifically, the structure is folded in a direction in which the second separator surrounds the unit cell or the bi-cell, and the unit cell or the bi-cell is folded to have a structure aligned to correspond to each other in a stacked form.
- a folding direction is indicated by an arrow, and a folding point is indicated by a dotted line.
- the unit cell or the bi-cell As shown in the figure, if folding starts from the right end, about one electrode 1010, 2010 located on the upper end of the unit cell 1100 or the bi-cell 2100 can contact the separators 1090 and 2090. There is an area in which the unit cell or the bi-cell is not arranged as much as the width of the unit cell 1100 or the bi-cell 2100 .
- the spacing between the cells 2200, 2300, 2400, and 2500 corresponds to the height of each unit cell or the cells stacked before the bi-cell and should be gradually widened, but FIGS. 14 and 15, it should be understood by those skilled in the art that they are shown at uniform intervals for convenience of expression.
- the improved method of manufacturing an electrode assembly of the present invention can solve this problem by using a pair of rollers having a pattern formed on the surface in the rolling process of manufacturing the electrode assembly.
- the method of manufacturing an electrode assembly of the present invention includes the steps of passing a heat-treated first separator and an electrode between a pair of rollers having a patterned surface and pressing the pressure to prepare a preliminary electrode assembly in which a plurality of first separators and electrodes are laminated. ; and passing the second separator on which the preliminary electrode assemblies are disposed between a pair of rollers having a patterned surface and pressing the second separator, and then winding the second separator so that the second separator is interposed between the preliminary electrode assemblies. Includes one or more of these.
- a method of pressing using a pair of rollers having a patterned surface only when a preliminary electrode assembly is manufactured is provided.
- an electrode assembly comprising a; winding so that the second separator is interposed between the preliminary electrode assemblies.
- a method of using a pair of rollers having a patterned surface only to press the second separator on which a plurality of preliminary electrode assemblies are disposed is provided.
- An electrode comprising a; passing through a second separator on which the preliminary electrode assemblies are disposed between a pair of rollers having a patterned surface and pressing the second separator, and then winding the second separator to be interposed between the preliminary electrode assemblies.
- a method of using a pair of rollers having a patterned surface both when manufacturing a preliminary electrode assembly and when pressing a second separator on which a plurality of preliminary electrode assemblies are disposed is provided.
- An electrode comprising a; passing through a second separator on which the preliminary electrode assemblies are disposed between a pair of rollers having a patterned surface and pressing the second separator, and then winding the second separator to be interposed between the preliminary electrode assemblies.
- FIG. 1 shows a roller with a patterned surface according to an embodiment of the present invention.
- the surface patterned roller 100 may be formed by directly engraving the pattern 120 on the surface of the roller body 110, or formed by attaching a separate pattern plate to the surface of the roller it might be In this way, the method of engraving the pattern on the surface of the roller may be in an engraving form in which a shape portion of a desired pattern is dug concavely, or may be in an embossing type in which a shape portion of a desired pattern is engraved in a concave manner.
- a rectangular pattern is formed by engraving with an intaglio
- a rectangular pattern is formed by engraving with an embossing.
- FIG. 4 shows a honeycomb structure pattern in which only the corner portion is left as a pattern surface in the hexagon, and the remaining portion is removed by intaglio.
- the roller having a patterned surface according to an embodiment of the present invention can be prepared.
- the surface-patterned roller of the present invention is replaced with a conventional roller with an unpatterned surface, that is, a roller having a flat surface without any irregularities on the surface, and the contact area with the electrode and/or the separator when the electrode assembly is manufactured.
- This can reduce the rolling (lamination) load of the electrode assembly, thereby reducing the physical stimulation of the separator and the electrode.
- the contact area and contact surface distribution in which the roller directly faces the electrode or the like can be freely adjusted.
- the roller with the patterned surface comes into contact with the opposite electrode, etc. in the lamination process, the parts that are not in integrated contact with the electrode due to pattern formation (the surface part removed from the intaglio or embossed surface, the surface of the original roller to which the pattern plate is not attached, etc.) Since it is possible to reduce the lamination load, it is possible to reduce the physical irritation to the electrode and the separator.
- the shape of the pattern formed on the roller may be applied alone or by mixing two or more hexagons, squares, triangles, circles, straight lines, oblique lines, polygons, and the like.
- a roller whose surface is patterned in a honeycomb structure when applied, it is the most structurally stable structure and for the reason that the adhesion effect can be maximized with a minimum adhesion area, it is not directly rolled from the obtained electrode assembly.
- the air permeability characteristics and the electrolyte impregnation characteristics of the non-removable separator can be further improved.
- the ratio of the area of the pattern directly facing the electrode to the total surface area of the roller on which the surface is patterned may be 1 to 99%.
- the pressurized area can be reduced, so that physical stimulation to the electrode and the separator can be minimized.
- FIG. 5 shows a plurality of electrodes and a first separator interposed between the plurality of electrodes after heat treatment, and then the heat-treated first separator and the electrode are passed between a pair of rollers with a patterned surface and pressurized, A process of preparing a preliminary electrode assembly in which the first separator and the electrode are laminated is shown.
- a separator 240 between a positive electrode having positive electrode active material layers 220 and 230 formed on both sides of the positive electrode current collector 210 and a negative electrode having negative electrode active material layers 320 and 330 formed on both sides of the negative electrode current collector 310 ) is heat-treated by passing the heat source 400 through the intervening state, and then the heat-treated separator and the electrode are passed between the pair of rollers 100 on which the pattern 120 is formed on the surface of the roller body 110.
- a preliminary electrode assembly 200 is obtained.
- the heat treatment may be performed in a time range of 0.01 to 10 seconds at a temperature range of 25 to 100° C. using a heater device.
- the pressing conditions are fluid depending on the adhesion and air permeability conditions. can be changed.
- FIG. 6A shows a conventional rolling roller, that is, a roller 500 having a flat surface 520 without any irregularities on the surface of the roller body 510 and unpatterned on the surface.
- Figure 6b is after heat treatment of a plurality of electrodes and a first separator interposed between the plurality of electrodes using such a conventional rolling roller, between the heat-treated first separator and a pair of rollers with a patterned surface of the electrode It shows a process of preparing a preliminary electrode assembly in which a plurality of first separators and electrodes are laminated by passing through and pressing.
- FIG. 7 shows a preliminary electrode assembly 10P manufactured using a pair of rollers having a patterned surface according to an embodiment of the present invention.
- the preliminary electrode assembly 10P of FIG. 7 includes a pair of first electrodes 600 having first electrode layers 620 and 630 formed on both surfaces of the first electrode current collector 610, and a second electrode current collector 710 of FIG.
- the contact area 820 in direct contact with the pattern part of the roller during the rolling process and the non-contact area that faces the unpatterned part and does not directly contact the pattern part ( 830) can be distinguished.
- the rolling strength (lamination strength) is applied to the non-contact region 830 that is not in direct contact with the pattern portion as compared to the contact region 820 , thereby making it less dense.
- the electrolyte can easily flow into the separator through the non-contact region 830 of the less densely formed separator, and as a result, the electrolyte impregnation property (wettability) of the electrode assembly ) properties can be significantly improved.
- the first electrode layers 620 and 630 and the second electrode layers 720 and 730 are also located at positions corresponding to the contact area 820 and the non-contact area 830 of the separator, and the area in direct contact with the pattern part of the roller during the rolling process. And contact areas 620a and 630a of the first electrode layers 620 and 630 and contact areas 720a and 730a of the second electrode layers 720 and 730 corresponding to the lower regions thereof may be formed.
- FIG. 8 a preliminary electrode assembly 20 manufactured using a conventional unpatterned roller is shown in FIG. 8 .
- all of the porous coating layer of the separation membrane is formed only as a contact area 820 in direct contact with the pattern portion of the roller during the rolling process, and a non-contact area not in direct contact cannot be provided.
- the plurality of preliminary electrode assemblies are disposed on one surface of a second separator while being spaced apart from each other, and the second separator in which the preliminary electrode assemblies are disposed between a pair of rollers with a patterned surface.
- the pressure may be passed through, and then wound up such that the second separator is interposed between the preliminary electrode assemblies.
- the plurality of preliminary electrode assemblies disposed on one surface of the second separator 1000 pass between a pair of rollers with a patterned surface to pass through the preliminary electrode assembly 10P.
- the plurality of preliminary electrode assemblies disposed on one surface of the second separator 1000 pass between a pair of rollers with a patterned surface to pass through the preliminary electrode assembly 10P.
- the plurality of preliminary electrode assemblies disposed on one surface of the second separator 1000 pass between a pair of rollers with a patterned surface to pass through the preliminary electrode assembly 10P.
- the plurality of preliminary electrode assemblies disposed on one surface of the second separator 1000 pass between a pair of rollers with a patterned surface to pass through the preliminary electrode assembly 10P.
- the preliminary electrode assembly 20P manufactured by passing between a pair of rollers whose surfaces are not patterned.
- the pressing conditions determine the adhesive force And air permeability can be changed flexibly according to conditions.
- the electrochemical device can be manufactured by being accommodated in a case and sealed in a conventional manner.
- the electrochemical device may be preferably a lithium secondary battery.
- roller 110 100, 500: roller 110, 510: roller body 120: pattern 520: surface
- first electrode current collector 620 first electrode current collector 620
- porous polymer substrate 800 organic / inorganic porous coating layer
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Abstract
Description
Claims (9)
- 복수의 전극과 상기 복수의 전극 사이에 개재된 제1 분리막을 열처리하는 단계;상기 열처리된 제1 분리막과 전극을 표면이 패턴화된 한 쌍의 롤러 사이에 통과시켜 가압하여, 복수의 제1 분리막과 전극이 라미네이션된 예비 전극조립체를 준비하는 단계;상기 예비 전극조립체 복수개를 서로 이격시키면서 제2 분리막의 일면 상에 배치하는 단계; 및상기 예비 전극조립체들 사이에 상기 제2 분리막이 개재되도록 권취하는 단계;를 포함하는 전극조립체의 제조방법.
- 복수의 전극과 상기 복수의 전극 사이에 개재된 제1 분리막을 열처리하는 단계;상기 열처리된 제1 분리막과 전극을 표면이 미패턴화된 한 쌍의 롤러 사이에 통과시켜 가압하여, 복수의 제1 분리막과 전극이 라미네이션된 예비 전극조립체를 준비하는 단계;상기 예비 전극조립체 복수개를 서로 이격시키면서 제2 분리막의 일면 상에 배치하는 단계; 및표면이 패턴화된 한 쌍의 롤러 사이에 상기 예비 전극조립체들이 배치된 제2 분리막을 통과시켜 가압하고, 이후 상기 예비 전극조립체들 사이에 상기 제2 분리막이 개재되도록 권취하는 단계;를 포함하는 전극조립체의 제조방법.
- 복수의 전극과 상기 복수의 전극 사이에 개재된 제1 분리막을 열처리하는 단계;상기 열처리된 제1 분리막과 전극을 표면이 패턴화된 한 쌍의 롤러 사이에 통과시켜 가압하여, 복수의 제1 분리막과 전극이 라미네이션된 예비 전극조립체를 준비하는 단계;상기 예비 전극조립체 복수개를 서로 이격시키면서 제2 분리막의 일면 상에 배치하는 단계; 및표면이 패턴화된 한 쌍의 롤러 사이에 상기 예비 전극조립체들이 배치된 제2 분리막을 통과시켜 가압하고, 이후 상기 예비 전극조립체들 사이에 상기 제2 분리막이 개재되도록 권취하는 단계;를 포함하는 전극조립체의 제조방법.
- 제1항 내지 제3항 중 어느 한 항에서,상기 표면이 패턴화된 한 쌍의 롤러가 상기 롤러 표면에 패턴을 각인하여 형성되거나, 상기 롤러 표면에 패턴판을 부착하여 형성되는 것을 특징으로 하는 전극조립체의 제조방법.
- 제1항 내지 제3항 중 어느 한 항에서,상기 패턴이 육각형, 사각형, 삼각형, 원형, 오각형, 직선형, 사선형, 다각형, 또는 이들 중 2 이상을 포함하는 것을 특징으로 하는 전극조립체의 제조방법.
- 제1항 내지 제3항 중 어느 한 항에서,상기 표면이 패턴화된 롤러의 전체 표면적 대비 상기 전극과 직접 대면하는 패턴의 면적이 1 내지 99%인 것을 특징으로 하는 전극조립체의 제조방법.
- 제1항 내지 제3항 중 어느 한 항의 제조방법으로 제조된 전극조립체.
- 제7항의 전극 조립체가 케이스에 수납된 전기화학 소자.
- 제8항에 있어서,상기 전기화학 소자가 리튬 이차전지인 것을 특징으로 하는 전기화학 소자.
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| EP21883210.3A EP4148857A4 (en) | 2020-10-19 | 2021-10-19 | METHOD FOR PRODUCING AN ELECTRODE ARRANGEMENT AND ELECTROCHEMICAL DEVICE COMPRISING THE ELECTRODE ARRANGEMENT |
| JP2022563115A JP7376032B2 (ja) | 2020-10-19 | 2021-10-19 | 電極組立体の製造方法及びその電極組立体を含む電気化学素子 |
| CN202180029253.XA CN115428221B (zh) | 2020-10-19 | 2021-10-19 | 制造电极组件的方法和包括电极组件的电化学装置 |
| US17/924,056 US20230187706A1 (en) | 2020-10-19 | 2021-10-19 | Method for Manufacturing Electrode Assembly and Electrochemical Device Including Electrode Assembly |
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| JP2023523192A (ja) | 2023-06-02 |
| CN115428221A (zh) | 2022-12-02 |
| EP4148857A1 (en) | 2023-03-15 |
| KR20220051828A (ko) | 2022-04-26 |
| CN115428221B (zh) | 2025-08-15 |
| KR102821199B1 (ko) | 2025-06-16 |
| US20230187706A1 (en) | 2023-06-15 |
| JP7376032B2 (ja) | 2023-11-08 |
| EP4148857A4 (en) | 2024-10-23 |
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