WO2023027456A1 - 단위셀의 제조 방법 및 제조 장치 - Google Patents
단위셀의 제조 방법 및 제조 장치 Download PDFInfo
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- WO2023027456A1 WO2023027456A1 PCT/KR2022/012528 KR2022012528W WO2023027456A1 WO 2023027456 A1 WO2023027456 A1 WO 2023027456A1 KR 2022012528 W KR2022012528 W KR 2022012528W WO 2023027456 A1 WO2023027456 A1 WO 2023027456A1
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- Prior art keywords
- unit
- cell
- holes
- free cell
- manufacturing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D9/00—Cutting apparatus combined with punching or perforating apparatus or with dissimilar cutting apparatus
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/045—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member for thin material, e.g. for sheets, strips or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
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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
-
- 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
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
- B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
- B26D1/085—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type for thin material, e.g. for sheets, strips or the like
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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
-
- 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 and apparatus for manufacturing a unit cell, and more particularly, to a method and apparatus for manufacturing a unit cell in which cutting accuracy is improved by forming a cutting guide line before cutting a separator sheet.
- the secondary battery is classified into a cylindrical battery and a prismatic battery in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and a pouch-type battery in which the electrode assembly is embedded in a pouch-type case made of an aluminum laminate sheet. .
- the electrode assembly built into the battery case is a power generating device capable of charging and discharging with a laminated structure of anode/separator/cathode, and is a jelly-roll type coiled with a separator interposed between a long sheet-type cathode and anode coated with an active material, and a predetermined It is classified as a stack type in which a plurality of anodes and cathodes of the same size are sequentially stacked with a separator interposed therebetween.
- a full cell or anode (cathode) / separator / cathode (anode) / separator / cathode / separator / cathode structure of a certain unit size A stack/folding type electrode assembly having a structure in which bicells having an anode (cathode) structure are folded using a long continuous separator film has been developed.
- the present invention has been devised in consideration of the above-mentioned problems, and an object of the present invention is to provide a unit cell manufacturing method and manufacturing apparatus that reduce cutting defects by increasing cutting accuracy in manufacturing unit cells.
- the present inventors discovered that the above-mentioned subject could be solved by the following unit cell manufacturing method and unit cell manufacturing apparatus.
- It relates to a method for manufacturing a unit cell comprising a.
- the free cell relates to a method for manufacturing a unit cell, characterized in that it further comprises a second separator sheet and a second electrode.
- the step B) relates to a method for manufacturing a unit cell, characterized in that the step of forming the cutting guide line in a region on the separator sheet corresponding to a region between adjacent electrodes among electrodes disposed apart from each other.
- step B)
- It relates to a method for manufacturing a unit cell, characterized in that the step of forming the plurality of through holes along the width direction of the free cell.
- step B)
- It relates to a method of manufacturing a unit cell, characterized in that the step of forming the through-holes so that the formation density of the plurality of through-holes appears relatively higher in the center area in the width direction of the free cell than in other areas.
- step B)
- Manufacturing a unit cell characterized in that the step of forming the through-holes so that the formation density of the plurality of through-holes appears relatively higher in the center region and both end regions in the width direction of the free cell than in other regions. It's about how.
- step B)
- the unit characterized in that the step of forming the through hole such that the sum of the lengths of each of the through holes extending along the width direction of the free cell ranges from 0.01 to 30% of the total length of the free cell in the width direction. It relates to a method of manufacturing a cell.
- step B)
- Manufacturing a unit cell characterized in that the step of forming the through hole so that the length of the through hole extending along the direction perpendicular to the width direction of the free cell is in the range of 1 to 5% with respect to the distance between the adjacent electrodes. It's about how.
- a hole forming unit forming a cutting guide line including a plurality of through holes spaced apart from each other on a separator sheet and a free cell including an electrode disposed on the separator sheet;
- a cutting unit cutting the free cell along the cutting guide line to form a plurality of unit cells
- It relates to a unit cell manufacturing apparatus comprising a.
- the hole forming unit relates to a unit cell manufacturing apparatus comprising a laser irradiation unit.
- the cutting guide line including the through-holes is formed so that the formation density of the plurality of through-holes is relatively higher in the center area in the width direction of the free cell than in other areas.
- the cutting guide line including the through holes is formed so that the formation density of the plurality of through holes appears relatively higher than other areas in the central region and both end regions in the width direction of the free cell It relates to a unit cell manufacturing device.
- a cutting guide line including the through-holes is formed such that the sum of the lengths of each of the plurality of through-holes extending along the width direction of the free cell ranges from 0.01 to 30% of the total length of the free cell in the width direction. It relates to a unit cell manufacturing apparatus characterized in that.
- the cutting guide line including the through hole is formed so that the length of the through hole extending along the direction perpendicular to the width direction of the free cell is in the range of 1 to 5% of the distance between the adjacent electrodes It relates to a unit cell manufacturing device.
- the manufacturing method and manufacturing apparatus of a unit cell according to the present invention by forming a cutting guide line before cutting, it is possible to reduce cutting defects by increasing the cutting accuracy during manufacturing of the unit cell, and to improve the manufacturing yield of the unit cell. there is.
- FIG. 1 is a diagram schematically showing a structure in which a plurality of through holes are formed on a free cell in one embodiment of the present invention.
- FIG. 2 is a view schematically showing a structure in which a plurality of through holes are formed on a free cell in another embodiment of the present invention.
- FIG 3 is a schematic cross-sectional view of an apparatus for manufacturing a unit cell according to an embodiment of the present invention.
- Example 4 is a unit cell cut according to Example 1 of the present invention.
- C) forming a plurality of unit cells by cutting the free cell along the cutting guide line may include.
- the first separator sheet is a component that is positioned between the positive electrode and the negative electrode to prevent a short circuit and enable the movement of ions, and is located on a porous polymer substrate and at least one surface of the porous polymer substrate, and includes inorganic particles and a binder polymer. It includes a porous coating layer formed of a mixture of.
- the porous polymer substrate, inorganic particles, and binder polymer are not particularly limited as long as they meet the purpose of the present invention.
- the porous polymer substrate has a melting point of less than 200°C and may include a polyolefin resin such as polyethylene, polypropylene, polybutylene, and polypentene.
- the inorganic particles are ZrO 2 , BaTiO 3 , Hafnia (HfO 2 ), SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, ZnO, ZrO 2 , Y 2 O 3 , Al 2 O 3 , TiO 2 , AlOOH, Al(OH) 3 , SiC or mixtures thereof.
- the binder polymer is polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer (polyvinylidene fluoride-co-hexafluoropropylene, PVDF-HFP), poly(vinylidene fluoride-chlorotri fluoroethylene) copolymer, polyvinylidene fluoride-cotrichloroethylene, polymethylmethacrylate, polyvinylpyrrolidone, polyvinyl alcohol, ethylene Polyethylene-co-vinyl acetate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, pullulan, carboxyl methyl cellulose (carboxyl methyl cellulose) and styrene-butadiene rubber may include one or a mixture of two or more selected from the group consisting of.
- inorganic particles are attached to each other by a binder polymer (that is, the binder polymer connects and fixes between inorganic particles) so that the inorganic particles can remain bound to each other, and the porous coating layer is porous by the binder polymer. It maintains the binding state with the polymer substrate.
- the inorganic particles of the porous coating layer may substantially exist in contact with each other, and an interstitial volume generated when the inorganic particles contact each other may form pores of the porous coating layer.
- the first electrode may be either a positive electrode or a negative electrode, and specifically, slurry containing an electrode active material may be applied on an electrode current collector, dried and compressed, and then cut into a predetermined size. .
- the first electrode is disposed on the first separator sheet, and specifically, a plurality of first electrodes cut to a predetermined size are spaced apart from each other at predetermined intervals on the first separator sheet to form a free cell.
- a free cell means a laminate in which at least one type of electrode is stacked on at least one separator sheet.
- the free cell may be laminated after at least one type of electrode is stacked on at least one separator sheet.
- the free cell including the first electrode stacked on the first separator sheet may further include a second separator sheet and/or a second electrode.
- the free cells include [first separator sheet/first electrode], [first separator sheet/first electrode/second separator sheet], and [first separator sheet/first electrode/second separator sheet/second separator sheet].
- electrode] may be a laminate of the same layer structure.
- the first electrode may be spaced apart from each other at a predetermined interval on the first separator sheet
- the second electrode is an electrode having a polarity opposite to that of the first electrode and is placed on the second separator sheet. They may be spaced apart from each other at predetermined intervals.
- the separator sheet and the electrode when at least one type of electrode is laminated on at least one separator sheet and then lamination is performed, the separator sheet and the electrode may be bonded.
- the separator sheet and the electrode may be bonded to each other by applying pressure. That is, the free cell may be a laminate in which at least one separator sheet and at least one type of electrode are bonded.
- Step B) is a step of increasing cutting accuracy in step C) by forming a cutting guide line on the free cell before step C) of cutting the free cell, which will be described later.
- the cutting guide line means a straight virtual line connecting a plurality of through holes.
- the plurality of through holes may be formed in a region on the separator sheet corresponding to a region between adjacent electrodes among electrodes spaced apart from each other in a free cell. Also, the plurality of through holes may be formed along the width direction of the free cell. When a plurality of through-holes are formed parallel to the width direction as described above, it may be helpful to increase the accuracy of cutting in step C), which will be described later.
- the through hole is a hole formed by penetrating at least one separator sheet provided in the free cell, and the shape is not limited, but is a substantially circular through hole having a substantially constant diameter, or a short axis and a long axis having different lengths. It may have a shape such as a substantially elliptical through hole.
- the width of the separator is widened due to cell design, the separator has strong strength, or the characteristics of the manufacturing device itself, such as the shape of the cutter, etc. Due to this, cutting defects may occur, such as that some regions of the free cell are not cut or show a non-uniform cutting cross section.
- the formation density of the plurality of through holes may be adjusted so that areas where cutting defects often occur are relatively higher than other areas.
- the through-holes are formed such that the formation density of the plurality of through-holes is relatively higher in the central region in the width direction of the free cell than in other regions, or the formation density of the plurality of through-holes is higher than that of the free cell.
- the through hole may be formed to appear relatively higher than other areas in the center area and both end areas in the width direction.
- the through-holes are arranged such that the sum of the lengths of each of the plurality of through-holes extending along the width direction of the free cell ranges from about 0.01 to 30% of the total length of the free cell in the width direction.
- the sum of the lengths of each of the plurality of through holes extending along the width direction of the free cell means the sum of the lengths of each of the through holes in the width direction of the free cell.
- it means the sum of d1+d2+d3+d4 or d1'+d2'+d3'+d4'.
- step C When through-holes are formed within the above range, it can help improve cutting accuracy in step C), which will be described later, and the tension applied by roll to roll equipment in the manufacturing process penetrates the separator sheet. It is possible to prevent deformation such as wrinkles or micro-stretching from appearing concentrated in an area where no holes are formed.
- the through hole may be formed such that a length of the through hole extending along a direction perpendicular to the width direction of the free cell is in a range of about 1 to 5% of the distance between the adjacent electrodes.
- the length of the through hole extending along the direction perpendicular to the width direction of the free cell means the length of the through hole extending along the direction from one electrode to the adjacent electrode, for example, As can be seen in Figure 2, it means r1, r2, r3, r1', r2', or r3'.
- the appearance of the cut surface after cutting is uniform without thermally affecting the electrode during the process of forming the through hole, so that clean cutting can be performed.
- C) a plurality of unit cells are formed by cutting the free cell along the cutting guide line.
- a cell for example, [first separator sheet/first electrode], [first separator sheet/first electrode/second separator sheet], [first separator sheet/first electrode/second separator sheet/second separator sheet] Electrode] can be manufactured as a stacked unit cell.
- a hole forming unit forming a cutting guide line including a plurality of through holes spaced apart from each other on a separator sheet and a free cell including an electrode disposed on the separator sheet;
- a cutting unit cutting the free cell along the cutting guide line to form a plurality of unit cells can include
- Figure 3 is an exemplary diagram for explaining the manufacturing apparatus of the unit cell of the present invention.
- the unit cell manufacturing apparatus includes a hole forming unit 10 and a cutting unit 20 .
- the unit cell manufacturing apparatus may further include a lamination unit (not shown) and/or a transfer unit (not shown) and/or a control unit (not shown) in addition to the above-described components.
- the hole forming unit 10 includes a separator sheet 1 and a plurality of through holes 11 spaced apart from each other on a free cell including an electrode 2 disposed on the separator sheet 1. form guidelines.
- the hole forming unit 10 may include at least one laser irradiation unit 12 .
- the laser irradiation unit 12 forms the through hole 11 by irradiating a laser beam in a direction substantially perpendicular to the free cell.
- the hole forming unit 10 forms a plurality of through holes 11 in an area on the separator sheet that corresponds to an area between adjacent electrodes among the electrodes 2 spaced apart from each other.
- the cutting guide line means a straight virtual line connecting a plurality of through holes.
- the hole forming unit 10 may include a plurality of laser irradiation units 12 provided at predetermined positions so as to simultaneously form a plurality of through holes 11 included in one cutting guide line.
- the hole forming unit 10 is provided with at least one actuator (not shown) capable of moving the position of at least one laser irradiation unit 12 by controlling its movement by a user or by a control unit 50 can do.
- one cutting guide line may be formed by multiple times of laser irradiation.
- the hole forming unit 10 is provided in at least one laser irradiation unit 12 whose movement is controlled by a plurality of laser irradiation units 12 disposed at predetermined positions or by a control unit 50 to be described later. Accordingly, it is possible to adjust the position where the through hole 11 is formed on the free cell and the formation density of the through hole 11 . As a result, it is possible to prevent cutting defects such as not being cut in some areas of the free cell or showing a non-uniform cutting cross section, making cutting in all areas on the free cell easier and improving cutting accuracy.
- the formation density of the plurality of through holes 11 may be adjusted so that areas where cutting defects often occur are relatively higher than other areas.
- the through-holes 11 are formed such that the formation density of the plurality of through-holes 11 is relatively higher in the central region in the width direction of the free cell than in other regions, or the plurality of through-holes 11 are formed.
- the through holes 11 may be formed such that the formation density of the holes 11 is relatively higher in the central region and both end regions of the free cell in the width direction than in other regions.
- the sum of the lengths of each of the plurality of through holes 11 extending along the width direction of the free cell is in the range of about 0.01 to 30% of the total length of the free cell in the width direction.
- a through hole 11 may be formed.
- the through hole 11 is formed within the above range, it can help to improve the cutting accuracy in step C), which will be described later, and the tension applied by the roll to roll equipment in the manufacturing process It is possible to prevent deformation such as wrinkles or micro-stretching from being concentrated in a region where the through holes 11 are not formed on the sheet.
- the through hole 11 is formed such that the length of the through hole 11 extending along the direction perpendicular to the width direction of the free cell ranges from about 1 to 5% of the distance between the adjacent electrodes. can When the through hole 11 is formed in the above range, the appearance of the cut surface after cutting is uniform without thermally affecting the electrode during the process of forming the through hole 11, so that clean cutting can be performed.
- the cutting unit 20 may cut a free cell along a cutting guide line including a plurality of through holes 11 .
- the cutting unit 20 may include a blade cutter.
- the blade cutter includes an upper coat 21 and / or a lower coat 22, and at least one of the upper coat or lower coat may mean a type that cuts the fabric sheet while moving vertically from the direction in which the fabric sheet is transported. there is.
- the terms "upper coat” and “lower coat” are not necessarily limited to being located at the top or bottom in the direction of gravity, and may mean that cutters are present in one direction and the opposite direction, respectively.
- an approximate inverted V shape ( ⁇ ) top coat can be used.
- the length to insert the blade is short, so movement can be minimized and cutting time can be shortened.
- the central region in the width direction of the free cell is more prone to cutting defects than other regions. Therefore, in one embodiment of the present invention, by forming a plurality of through holes 11 in areas where cutting defects often occur and adjusting the formation density of the through holes 11, cutting is facilitated in all areas on the free cell. and increase the cutting accuracy.
- the lamination unit may include a pair of pressure rollers.
- the lamination unit may pressurize and bond a laminate in which at least one separator sheet 1 and at least one type of electrode 2 are stacked.
- the pair of pressure rollers may additionally apply heat in addition to pressure.
- the pair of pressure rollers may have a self-heating structure, for example, or may be heated by a separate heating device.
- the free cell before forming a cutting guide line including a plurality of through holes 11 spaced apart from each other on the free cell, the free cell passes through the lamination unit 30, thereby forming the separator sheet 1 and the separator.
- the electrodes 2 disposed on the sheet 1 may be bonded.
- the transfer unit (not shown) may be provided to transfer the free cell including the separator sheet 1 and the electrode 2 disposed on the separator sheet 1 in one direction in the unit cell manufacturing apparatus.
- the transfer unit may include, for example, a conveyor.
- the transfer unit may include a belt conveyor.
- the control unit is located inside and/or outside the manufacturing apparatus of the unit cell of the present invention, but is connected to each unit of the present invention to control the operation of each unit, as well as the mutual relationship between the operations of each unit. Also can be adjusted.
- control unit may arrange the electrodes 2 on the separator sheet at regular intervals by controlling the operation of an electrode placement unit (not shown) through a control signal.
- control unit may form a plurality of through holes 11 in each region between spaced apart electrodes by controlling the operation of the hole forming unit 10 through a control signal, and the through holes 11 on the free cell may be formed. ) is formed and the formation density of the through holes 11 can be adjusted.
- negative electrodes cut into 94 mm * 510 mm in size on each separator sheet are spaced apart from each other so that they can be stacked in order of separator sheet / negative electrode / separator sheet.
- Prepare a free cell disposed at a distance of 3 mm did At this time, the cut negative electrode was placed between the separator sheets.
- a cutting guide line including a through hole was formed in the prepared free cell.
- the through-holes were formed in a line along the width direction of the free cell in a circular shape having a diameter of 50 ⁇ m using a laser irradiation device.
- the sum of the lengths of each of the through holes extending along the width direction of the free cell was 0.48% of the total length of the free cell in the width direction.
- a plurality of unit cells were manufactured by cutting the free cell using a blade having an inverted V shape.
- a unit cell was manufactured in the same manner as in Example 1, except that no cutting guide line was formed.
- Example 1 It was confirmed whether or not cutting defects occurred in the unit cells manufactured by Example 1 and Comparative Example 1.
- the unit cell manufactured in Example 1 is shown in FIG. 4 and the unit cell manufactured in Comparative Example 1 is shown in FIG. 5 .
- Example 1 compared to Comparative Example 1, it can be confirmed that the cutting cross section of each unit cell is uniform and neatly cut.
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Abstract
Description
Claims (14)
- A) 제1 분리막 시트 및 상기 제1 분리막 시트 상에 상호 이격 배치되는 복수의 제1 전극을 포함하는 프리셀을 제조하는 단계;B) 상기 프리셀 상에 이격 배치되는 복수의 관통홀을 포함하는 컷팅 가이드 라인을 형성하는 단계; 및C) 상기 컷팅 가이드 라인을 따라 상기 프리셀을 컷팅 하여 복수의 단위셀을 형성하는 단계;를 포함하는 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 프리셀은, 제2 분리막 시트 및 제2 전극을 더 포함하는 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 B) 단계는, 이격하여 배치된 전극 중 서로 인접한 전극 사이의 영역과 대응되는 분리막 시트 상의 영역에 상기 컷팅 가이드 라인을 형성하는 단계인 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 B) 단계는,상기 프리셀의 폭 방향을 따라 상기 복수의 관통홀을 형성하는 단계인 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 B) 단계는,상기 복수의 관통홀의 형성 밀도가 상기 프리셀의 폭 방향 중심 영역에서 그 외 영역에 비해 상대적으로 더 높게 나타나도록 상기 관통홀을 형성하는 단계인 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 B) 단계는,상기 복수의 관통홀의 형성 밀도가, 상기 프리셀의 폭 방향 중심 영역 및 양 측 단부 영역에서, 그 외 영역에 비해 상대적으로 더 높게 나타나도록 상기 관통홀을 형성하는 단계인 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 B) 단계는,상기 프리셀의 폭 방향을 따라 연장된 상기 관통홀 각각의 길이의 합이, 상기 프리셀의 폭 방향의 총 길이에 대하여, 0.01 내지 30% 범위가 되도록 상기 관통홀을 형성하는 단계인 것을 특징으로 하는 단위셀의 제조 방법.
- 제1항에 있어서,상기 B) 단계는,상기 프리셀의 폭 방향과 수직한 방향을 따라 연장된 상기 관통홀의 길이가, 상기 인접한 전극 사이의 간격에 대하여 1 내지 5% 범위가 되도록 상기 관통홀을 형성하는 단계인 것을 특징으로 하는 단위셀의 제조 방법.
- 분리막 시트 및 상기 분리막 시트 상에 배치되는 전극을 포함하는 프리셀 상에 상호 이격 배치되는 복수의 관통홀을 포함하는 컷팅 가이드 라인을 형성하는 홀 형성 유닛; 및상기 컷팅 가이드 라인을 따라 상기 프리셀을 컷팅 하여 복수의 단위셀을 형성하는 컷팅 유닛;을 포함하는 것을 특징으로 하는 단위셀 제조 장치.
- 제9항에 있어서,상기 홀 형성 유닛은 레이저 조사부를 포함하는 것을 특징으로 하는 단위셀 제조 장치.
- 제9항에 있어서,상기 홀 형성 유닛은,상기 복수의 관통홀의 형성 밀도가 상기 프리셀의 폭 방향 중심 영역에서 그 외 영역에 비해 상대적으로 더 높게 나타나도록 상기 관통홀을 포함하는 컷팅 가이드 라인을 형성하는 것을 특징으로 하는 단위셀의 제조 장치.
- 제9항에 있어서,상기 홀 형성 유닛은,상기 복수의 관통홀의 형성 밀도가, 상기 프리셀의 폭 방향 중심 영역 및 양 측 단부 영역에서, 그 외 영역에 비해 상대적으로 더 높게 나타나도록 상기 관통홀을 포함하는 컷팅 가이드 라인을 형성하는 것을 특징으로 하는 단위셀의 제조 장치.
- 제9항에 있어서,상기 홀 형성 유닛은,상기 프리셀의 폭 방향을 따라 연장된 상기 복수의 관통홀 각각의 길이의 합이, 상기 프리셀의 폭 방향의 총 길이에 대하여, 0.01 내지 30% 범위가 되도록 상기 관통홀을 포함하는 컷팅 가이드 라인을 형성하는 것을 특징으로 하는 단위셀의 제조 장치.
- 제9항에 있어서,상기 홀 형성 유닛은,상기 프리셀의 폭 방향과 수직한 방향을 따라 연장된 상기 관통홀의 길이가, 상기 인접한 전극 사이의 간격에 대하여 1 내지 5% 범위가 되도록 상기 관통홀을 포함하는 커팅 가이드 라인을 형성하는 것을 특징으로 하는 단위셀의 제조 장치.
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| EP22861666.0A EP4243136A4 (en) | 2021-08-23 | 2022-08-22 | METHOD AND APPARATUS FOR MANUFACTURING UNIT CELL |
| JP2023526643A JP7592162B2 (ja) | 2021-08-23 | 2022-08-22 | 単位セルの製造方法及び製造装置 |
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| CN121605520A (zh) * | 2023-08-03 | 2026-03-03 | 株式会社Lg新能源 | 用于制造电极组件的方法 |
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| JP2023548502A (ja) | 2023-11-17 |
| US20230405858A1 (en) | 2023-12-21 |
| JP7592162B2 (ja) | 2024-11-29 |
| CN116783029A (zh) | 2023-09-19 |
| EP4243136A1 (en) | 2023-09-13 |
| KR102863478B1 (ko) | 2025-09-22 |
| EP4243136A4 (en) | 2024-07-17 |
| KR20230029136A (ko) | 2023-03-03 |
| US12337494B2 (en) | 2025-06-24 |
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