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WO2023043176A1 - Ensemble électrode, son appareil de fabrication et son procédé de fabrication - Google Patents

Ensemble électrode, son appareil de fabrication et son procédé de fabrication Download PDF

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Publication number
WO2023043176A1
WO2023043176A1 PCT/KR2022/013704 KR2022013704W WO2023043176A1 WO 2023043176 A1 WO2023043176 A1 WO 2023043176A1 KR 2022013704 W KR2022013704 W KR 2022013704W WO 2023043176 A1 WO2023043176 A1 WO 2023043176A1
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WO
WIPO (PCT)
Prior art keywords
electrode
separator
separator sheet
sheet
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2022/013704
Other languages
English (en)
Korean (ko)
Inventor
이병규
김진곤
정수택
정주영
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Energy Solution Ltd
Original Assignee
LG Energy Solution Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020220114322A external-priority patent/KR102666731B1/ko
Application filed by LG Energy Solution Ltd filed Critical LG Energy Solution Ltd
Priority to CN202280036403.4A priority Critical patent/CN117355969A/zh
Priority to JP2023563163A priority patent/JP7782577B2/ja
Publication of WO2023043176A1 publication Critical patent/WO2023043176A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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 an electrode assembly in which an electrode and a separator sheet 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 electrode assembly including a Z-folding type electrode assembly with improved battery cell performance while preventing the electrode from being moved out of position, a manufacturing apparatus therefor, and a manufacturing method therefor.
  • An object to be solved by the present invention is an electrode assembly in which an electrode and a separator sheet are stacked in a Z-folding type, and an electrode assembly capable of preventing the electrode from departing from its original position, a manufacturing device thereof, and a manufacturing method thereof. is to do
  • An electrode assembly manufacturing apparatus includes an electrode supply unit provided with an electrode sheet on which a plurality of electrodes are formed; a separator supply unit that is folded when the electrode is seated and provided with a separator sheet covering the electrode and stacked with the electrode; a table for seating the electrodes on an upper surface to have the separator sheet folded between the electrodes to form the electrode assembly; a separator guide for guiding a folding direction of the separator sheet; a pair of applicators for applying an adhesive to at least a portion of the separator sheet and/or the electrode seated on the table; and a pair of pressure rollers for pressing the separator sheet guided by the separator guide.
  • the pair of pressure rollers may be positioned between the table and the separator guide.
  • the electrode supply unit may include a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed; and a second electrode supply unit provided with a second electrode sheet on which a plurality of second electrodes are formed.
  • the electrode assembly manufacturing apparatus may include a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table.
  • the pair of applicators may include a first nozzle and a second nozzle, and each of the pair of applicators may apply an adhesive to the separator sheet or the electrode positioned on the table.
  • the first nozzle and the second nozzle may be disposed on both sides with the separator guide interposed therebetween.
  • the pair of pressure rollers include a first pressure roller and a second pressure roller, the first pressure roller is positioned between the first nozzle and the separator guide, and the second pressure roller is positioned between the second nozzle and the separator guide. It may be located between the separator guides.
  • 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.
  • first header adsorbing the first electrode and seating the first electrode in the first region; and a second header adsorbing the second electrode so as to be seated in the second region.
  • the separator guide, the pair of applicators, and the pair of pressure rollers are fixed, and the table may linearly reciprocate toward the first transfer device and the second transfer device.
  • the table is fixed, and the separator guide, the pair of applicators, and the pair of pressure rollers may linearly reciprocate toward the first transfer device and the second transfer device.
  • the electrode assembly manufacturing apparatus may further include a moving box accommodating the separator guide and the pair of applicators therein.
  • 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; A separator sheet provided from a separator supply unit is guided along a separator guide, the separator sheet guided by the separator guide is placed on a table in a state in which a first pressure roller presses the separator sheet, and the separator sheet is placed on a first area of the separator sheet. Applying the adhesive to the first nozzle; seating the first electrode on a first region of the separator sheet; applying an adhesive to the top of the first electrode by a first nozzle; and folding the separator sheet in a folding direction guided by the separator guide so that a second region of the separator sheet covers the first electrode.
  • the separator guide, the first nozzle, the second nozzle, the first pressure roller, and the second pressure roller are fixed, and the table can linearly reciprocate toward the first transfer device and the second transfer device. there is.
  • the table is fixed, and the separator guide, the first nozzle, the second nozzle, the first pressure roller, and the second pressure roller may linearly reciprocate toward the first transfer device and the second transfer device. there is.
  • 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, and the adhesive layer is used in a battery cell. dissolved in the electrolyte for
  • 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. .
  • Each of the first adhesive layer and the second adhesive layer may be formed by applying an adhesive in the form of a plurality of dots.
  • 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 perspective view schematically showing a part of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • FIG 3 is a schematic view showing an adhesive applied to a first region of a separator sheet while a table linearly moves in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing a state in which a first electrode is seated on a first region of a separator sheet in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 5 is a schematic view showing an adhesive applied to the top of the first electrode while the table linearly moves in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing how an adhesive is applied to a second region of a separator sheet while a table linearly moves in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention.
  • FIG. 7 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. 8 is a schematic view showing an adhesive applied to a first region of a separator sheet while a first nozzle linearly moves in an apparatus for manufacturing an electrode assembly according to another embodiment of the present invention.
  • FIG. 9 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 another embodiment of the present invention.
  • FIG 10 is a schematic view showing an adhesive applied to the first electrode while the first nozzle linearly moves in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.
  • FIG. 11 is a state in which an adhesive is applied to a second region of a separator sheet while a second nozzle linearly moves in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention, and a second electrode is seated in the second region of the separator sheet.
  • FIG. 12 is a cross-sectional view of an electrode assembly according to an embodiment of the present invention.
  • FIG. 13 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 perspective view schematically showing a part of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • 3 is a schematic view showing a state in which a first electrode is seated on a first region of a separator sheet in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • 4 is a schematic view showing a state in which a first electrode is seated on a first region of a separator sheet in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • An electrode assembly manufacturing apparatus provides an electrode supply unit provided with an electrode sheet on which a plurality of electrodes are formed, a separator sheet that is folded when the electrode is seated and covers the electrode and is laminated with the electrode a separator supply unit, a table for seating the electrodes on an upper surface to have the separator sheet folded between the electrodes to form the electrode assembly, a separator guide for guiding the folding direction of the separator sheet, and the separator sheet seated on the table. and a pair of nozzles for applying an adhesive to at least a portion of the separator sheet and/or the electrode, and a pair of pressure rollers for pressing the separator sheet guided by the separator guide.
  • a method of manufacturing an electrode assembly includes forming an electrode 11 by cutting electrode sheets 1111 and 1121 (S101); A step of seating the separator sheet 122 on the table 16 and applying an adhesive to the separator sheet 122 (S102); seating the electrode 11 on the separator sheet 122 (S103); Applying an adhesive to the electrode 11 and the separator sheet 122 (S104); and folding the separator sheet 122 and covering the electrode 11 (S105).
  • the adhesive is applied to the upper and lower portions of the electrode 11, (11) can be prevented from departing 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; a pair of nozzles 17 for applying an adhesive to at least a portion of the separator sheet 122 or the electrode 11 seated on the table 16; and a pair of pressure rollers 130 that press the separator sheet 122 guided by the separator 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 nozzles 17 may be an example of the 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 111 . 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 can move between the first electrode reel 111 and the second electrode reel 112 . For example, in FIG. 3 , forward and backward movement may be performed along the horizontal direction, and linear reciprocating motion may be performed toward the first electrode reel 111 and the second electrode reel 112 .
  • the table 16 linearly 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 electrode assembly manufacturing apparatus 1 may include headers 151 and 152 for adsorbing the electrode 11 and seating the electrode 11 on the separator sheet 122 . More specifically, the headers 151 and 152 adsorb the first header 151 and the second electrode 1122, which adsorb the first electrode 1112 and seat it on the separator sheet 122, and A second header 152 for seating may be further included.
  • the first header 151 and the second header 152 may respectively move toward the table 16 . For example, in FIG. 3 , forward and backward movement may be performed along a horizontal direction, and linear reciprocal movement may be performed.
  • first header 151 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 first header 151 and the second header 152 may linearly move toward the table 16 .
  • the first header 151 and the second header 152 can move the electrode 11 upward on the table 16, and stably attach the electrode 11 to the separator sheet 122. can be settled with
  • the headers 151 and 152 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.
  • a pair of nozzles 17 apply an adhesive to at least a portion of a surface corresponding to an upper portion of the electrode 11 and/or an upper portion of the separator sheet 122 . More specifically, the pair of nozzles 17 apply the adhesive to at least a portion of the top of the first nozzle 171 and the second electrode 1122 for applying the adhesive to at least a portion of the upper portion of the first electrode 1112 It includes a second nozzle 172 that does.
  • the first nozzle 171 may form the first adhesive layer 1710 by applying an adhesive to the first region 1221 of the separator sheet 122 seated on the table 16 as shown in FIG. 3 . More specifically, as the table 16 linearly moves toward the first transfer device 141 as shown in FIG. 3 , the adhesive applied from the first nozzle 171 is applied to the first area 1221 of the separator sheet 122. A first adhesive layer 1710 may be formed thereon. Thereafter, the first electrode 1112 may be seated on the first region 1221 of the separator sheet 122 on which the first adhesive layer 1710 is formed.
  • 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 adhesive is uniformly applied to the first region 1221 of the separator sheet 122 .
  • 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 first region 1221 of the separator sheet 122 by a spot application method in which the adhesive is applied in a dot form or a line application method in which it is applied 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 included in the adhesive layer 1710 positioned between the first region 1221 of the separator sheet 122 and the first electrode 1112 may be dissolved in the electrolyte. More specifically, when the first adhesive layer 1710 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, this means that the area of the first adhesive layer 1710 is reduced or the first adhesive layer 1710 is completely removed so that the first adhesive layer 1710 does not remain in the first area 1221 of the separator sheet 122. can do.
  • the adhesive may be an acrylate-based adhesive. That is, as the present embodiment applies the acrylate-based adhesive as the adhesive to the first region 1221 of the separator sheet 122, the adhesive can be dissolved into the electrolyte solution included in the final battery cell.
  • the first adhesive layer 1710 fixes the first electrode 1112 to the first region 1221 of the separator sheet 122 during the manufacturing process, thereby preventing it from being displaced from its original 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.
  • the electrode assembly manufacturing apparatus 1 may include a pair of pressure rollers 130 that press the separator sheet 122 guided by the separator guide 125.
  • the pair of pressure rollers 130 may be designed to bias the separator sheet 122 between the separator guide 125 and the table 16 . More specifically, the pair of pressure rollers 130 may be positioned between the table 16 and the membrane guide 125 . Here, the pair of pressure rollers 130 may be fixed. For example, the pressure roller 130 may not move.
  • the pair of pressure rollers 130 may have a shape in which a pair of rolls are arranged horizontally.
  • each pressure roller 130 may be spaced apart from each other along a horizontal direction.
  • the pressure roller 130 may press one surface of the separator sheet 122 .
  • the shape of the pressure roller 130 is not limited thereto, and any shape capable of pressing one surface of the separator sheet 122 may be included in the present embodiment.
  • At least one of the pair of pressure rollers 130 presses one surface of the separator sheet 122 as shown in FIGS. 3 and 4 to maintain the tension, direction, and/or position of the separator sheet 122 at a constant level. You can control it. Therefore, as shown in FIGS. 3 and 4 , while the table 16 moves relative to the separator guide 125, the pair of pressure rollers 130 move the direction of the separator sheet 122 relative to the nozzles 171 and 172 . and/or distances may be maintained.
  • the pair of pressure rollers 130 may be positioned between the first nozzle 171 and the second nozzle 172 .
  • the pair of pressure rollers 130 may include a first pressure roller 1301 and a second pressure roller 1302 .
  • the first pressure roller 1301 is located between the first nozzle 171 and the membrane guide 125
  • the second pressure roller 1302 is located between the second nozzle 172 and the membrane guide 125.
  • the first nozzle 171 and the second nozzle 172 may apply the adhesive on the separator sheet 122 pressed by at least one of the pair of pressure rollers 130 .
  • the first pressure roller 1301 is applied to the first area 1221 of the separator sheet 122 by applying the adhesive from the first nozzle 171 to one side of the separator sheet 122. can pressurize. Accordingly, the first pressure roller 1301 can maintain a constant height difference between the first region 1221 of the separator sheet 122 and the first nozzle 171, and the first adhesive layer 1710 is applied.
  • the amount or thickness of application can be relatively uniform. This can also be explained in the case of the second pressure roller 1302 as well.
  • the first nozzle 171 is provided between the first area 1221 of the separator sheet 122 and the first nozzle 171. Height or angle can be adjusted. For example, based on the first area 1221 of the separator sheet 122, the first nozzle 171 has a constant height difference between the first area 1221 of the separator sheet 122 and the first nozzle 171. or rotated so that the angle between the first region 1221 of the separator sheet 122 and the first nozzle 171 is constant.
  • the height difference or angle between the first nozzle 171 and the first region 1221 of the separator sheet 122 is the same. Therefore, the application reliability of the adhesive applied from the first nozzle 171 to the first region 1221 of the separator sheet 122 can be further improved. 6 and 7, in a state where the separator sheet 122 is pressed by the second pressure roller 1302, the second nozzle 172 is applied to the second area 1222 of the separator sheet 122. The case of applying the adhesive can be similarly explained.
  • FIG. 5 is a schematic view showing an adhesive applied to the top of the first electrode while the table linearly moves in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing how an adhesive is applied to a second region of a separator sheet while a table linearly moves in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention.
  • the first nozzle 171 and the second nozzle 172 may be disposed on both sides with the separator sheet 122 interposed therebetween.
  • the first nozzle 171 as shown in FIG. 5 , before the second region 1222 of the separator sheet 122 covers the upper part of the first electrode 1112, at least the upper part of the first electrode 1112 is covered.
  • An adhesive may be applied to a portion to form the second adhesive layer 1750 . 6 after the second area 1222 of the separator sheet 122 covers the upper part of the first electrode 1112, the second nozzle 172 covers the second area of the separator sheet 122 ( 1222) may be coated with an adhesive to form the first adhesive layer 1710.
  • the second nozzle 172 is applied to the upper portion of the second electrode 1122 before the first region 1221 of the separator sheet 122 covers the upper portion of the second electrode 1122.
  • An adhesive may be applied to at least a portion of the second adhesive layer 1750 .
  • the first nozzle 171 covers at least the first area 1221 of the separator sheet 122 after the first area 1221 of the separator sheet 122 covers the upper part of the second electrode 1122.
  • An adhesive may be applied to a portion to form the first adhesive layer 1710 .
  • the table 16 may linearly reciprocate left and right based on the pair of nozzles 17 . That is, the table 16 moves linearly in a direction toward the first transfer device 141 or the second transfer device 142 based on the pair of nozzles 17, while the electrode 11 or the separator sheet 122 An adhesive may be applied to at least a part of the top of the.
  • first adhesive layer 1710 is formed by applying an adhesive between the lower part of the electrode 11 and the separator sheet 122
  • second adhesive layer 1750 is formed by applying an adhesive between the upper part of the electrode 11 and the separator sheet 122. It can be distinguished as being formed by applying.
  • the first nozzle 171 is installed on the first electrode 1112.
  • the second nozzle 172 applies the adhesive to at least a portion of the second region 1222 of the separator sheet 122 to form the first adhesive layer 1750 .
  • An adhesive layer 1710 may be formed. This is the opposite case, and before the first region 1221 of the separator sheet 122 covers the upper part of the second electrode 1122, the second nozzle 172 is at least part of the upper part of the second electrode 1122.
  • the first nozzle 171 applies the adhesive to at least a part of the first region 1221 of the separator sheet 122 to form the first adhesive layer 1710. can form.
  • the pair of nozzles 17 can simultaneously apply the adhesive to the upper portion of the separator sheet 122 or the electrode 11, respectively, so that the process time of the adhesive application process is reduced and the process efficiency is reduced. can be improved more than this.
  • the pair of pressure rollers 130 may have a second adhesive layer 1750 formed on the first electrode 1112 spaced apart from each other. Accordingly, when the table 16 moves in a straight line, the adhesive applied to the second adhesive layer 1750 formed on the first electrode 1112 may be prevented from directly contacting the pair of pressure rollers 130 .
  • the second pressure roller 1302 presses one surface of the separation membrane sheet 122 and moves the second area 1222 of the separation membrane sheet 122 in a direction opposite to the moving direction of the table 16 .
  • the first adhesive layer 1710 and/or the second adhesive layer 1750 between the first electrode 1112 and the first electrode 1112 may be pressed. Accordingly, the first adhesive layer 1710 and/or the second adhesive layer 1750 formed between the first electrode 1112 and the second region 1222 of the separator sheet 122 may be more uniformly applied. This can be explained in the same way when the first pressure roller 1301 presses the first region 1221 of the separator sheet 122 covering the second electrode 1122 on which the first adhesive layer 1710 is formed. .
  • FIG. 7 is a schematic diagram showing a state in which a separator guide linearly moves and a second electrode is seated on a second region of a separator sheet 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 .
  • the pair of pressure rollers 130 may help guide the folding direction of the separator sheet 122 by the separator guide 125 .
  • the separator guide 125 may have a shape in which a pair of rolls are arranged horizontally, and the second pressure roller in a state in which the separator sheet 122 is inserted between the pair of pressure rollers 130 1302 may press the separator sheet 122 .
  • 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 guide 125 may be located at upper and lower portions of the pair of 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 may be fixed together with a pair of nozzles 17 and a pair of pressure rollers 130 .
  • the table 16 linearly reciprocates toward the first transfer device 141 and the second transfer device 142 based on the separator guide 125, and the separator sheet 122 guided by the separator guide 125 ) is folded along the moving direction of the separator guide 125, so that the separator sheet 122 may cover the electrode 11.
  • the table 16 moves the second transfer device 142 , the second region 1222 of the separator sheet 122 may cover the upper portion of the first electrode 1112 .
  • the adhesive application process of the pair of nozzles 17 and the folding process of the separator sheet 122 by the separator guide 125 can be simultaneously performed. Time is reduced, and process efficiency can be further improved.
  • the electrode assembly 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, the separator sheet 122 is placed on the upper surface of the table 16 in a state of being pressed by the first pressure roller 1301, and the first nozzle ( 171) applies an adhesive to the separator sheet 122 (S102).
  • the table 16 linearly moves toward the first transfer device 141, and along with the movement of the table 16, the first nozzle 171 is on the first area 1221 of the separator sheet 122.
  • a first adhesive layer 1710 is formed.
  • the first header 151 may linearly move onto the table 16 while the first electrode 1112 is attached thereto. And, when the first header 151 is located above the table 16, as shown in FIG. 3, the first header 151 is a part of the separator sheet 122 on which the first adhesive layer 1710 is formed. The first electrode 1112 is seated on the first region 1221 (S103).
  • the table 16 is moved to the second transfer device 142.
  • the first nozzle 171 applies an adhesive to the top of the first electrode 1112 to form a second adhesive layer 1750 .
  • the second nozzle 172 also moves toward the separator sheet 122.
  • An adhesive is applied to the second region 1222 of the sheet 122 to form a first adhesive layer 1710 (S104).
  • the second cutter 132 cuts the second electrode sheet 1121 . Then, a plurality of second electrodes 1122 are formed. 7 , when the second transfer device 142 transfers the second electrode 1122 , the second header 152 adsorbs the second electrode 1122 . And, when the second region 1222 of the separator sheet 122 covers the first electrode 1112, the second header 152 adsorbing the second electrode 1122 is the portion of the second region 1222. By moving upward, the second electrode 1122 is seated on the second region 1222 where the first adhesive layer 1710 is formed.
  • the second nozzle 172 applies the adhesive to the top of the second electrode 1122 .
  • the second nozzle 172 may form a second adhesive layer 1750 on 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.
  • an electrode assembly manufacturing apparatus 2 according to another embodiment of the present invention will be described.
  • the electrode assembly manufacturing apparatus 2 of this embodiment can be described in most of the same as the electrode assembly manufacturing apparatus 1 described above with reference to FIGS. 2 to 7, and only parts different from the electrode assembly manufacturing apparatus 1 will be described below. want to do
  • FIG. 8 is a schematic view showing an adhesive applied to a first region of a separator sheet while a first nozzle linearly moves in an apparatus for manufacturing an electrode assembly according to another embodiment of the present invention.
  • the table 16a may be fixed. Accordingly, the electrode 11 and the separator sheet 122 can be stacked on the table 16 while the table 16a is fixed, so that the alignment of the electrode 11 and the separator sheet 122 is further improved. It can be.
  • the separator guide 125, the first nozzle 171a, and the second nozzle 172a may move forward and backward along the horizontal direction of FIG. 7 between the first and second electrode reels 111 and 112. .
  • the separator guide 125, the first nozzle 171a, and the second nozzle 171b may rectilinearly reciprocate left and right with respect to the table 16a.
  • the adhesive is attached to the first area 1221 of the separator sheet 122. may be applied to form the first adhesive layer 1710 .
  • the pair of pressure rollers 130 may move together with the separator guide 125, the first nozzle 171a, and the second nozzle 172a while pressing one surface of the separator sheet 122.
  • the first pressure roller 1301 may move together with the second pressure roller 1302, the first nozzle 171a, and the second nozzle 172a while pressing one surface of the separator sheet 122.
  • the pair of pressure rollers 130 can maintain the tension of the separator sheet 122 .
  • a height difference between the first nozzle 171a and the second nozzle 172a and the separator sheet 122 may be maintained.
  • the electrode assembly manufacturing apparatus 2 of this embodiment may further include a moving box 18 accommodating the separator guide 125, the first nozzle 171a, and the second nozzle 172a. That is, in the electrode assembly manufacturing apparatus 2 of the present embodiment, as the moving box 18 moves, the separator guide 125, the first nozzle 171a, and the second nozzle 172a can move simultaneously.
  • the interval between the first nozzle 171a and the membrane guide 125 and the interval between the second nozzle 172a and the membrane guide 125 can be maintained constant, and the first nozzle 171a and the membrane guide 125 can maintain a constant distance.
  • the application reliability of the adhesive applied from the two nozzles 172a may be improved.
  • the angles of the first nozzle 171a and/or the second nozzle 172a are rotated or the first nozzle 171a and the second nozzle 172a are moved within the moving box 18, so that the first nozzle ( 171a) and/or the height difference or angle between the second nozzle 172a and the separator 122 may be adjusted. Even in this case, the distance between the first nozzle 171a and the separator guide 125 and the distance between the second nozzle 172a and the separator guide 125 in the moving box 18 can be maintained the same, The application reliability of the adhesive applied from the first nozzle 171a and the second nozzle 172a may be further improved.
  • the electrode assembly manufacturing method according to another embodiment of the present invention is 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, the separator sheet 122 is placed on the upper surface of the table 16a in a state of being pressed by the first pressure roller 1301, and the first nozzle ( 171a) applies an adhesive to the separator sheet 122 (S102). At this time, the first nozzle 171a forms the first adhesive layer 1710 on the first region 1221 of the separator sheet 122 while linearly moving toward the second transfer device 142 .
  • FIG. 9 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 another embodiment of the present invention.
  • the first header 151 may linearly move onto the table 16 while the first electrode 1112 is attached thereto. And, when the first header 151 is located above the table 16a, as shown in FIG. 9 , the first header 151 is a part of the separator sheet 122 on which the first adhesive layer 1710 is formed. The first electrode 1112 is seated on the first region 1221 (S103).
  • 10 is a schematic view showing an adhesive applied to the first electrode while the first nozzle linearly moves in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.
  • 11 is a state in which an adhesive is applied to a second region of a separator sheet while a second nozzle linearly moves in an apparatus for manufacturing an electrode assembly according to an embodiment of the present invention, and a second electrode is seated in the second region of the separator sheet. It is a schematic diagram showing
  • the first nozzle 171a is a first transfer device ( 141 , the first nozzle 171a applies an adhesive to the top of the first electrode 1112 to form a second adhesive layer 1750 .
  • the separation of the separator sheet 122 An adhesive is applied to the second region 1222 to form a first adhesive layer 1710 (S104).
  • the separator One side of the sheet 122 is folded so that the second region 1222 of the separator sheet 122 covers the first electrode 1112 on which the second adhesive layer 1750 is formed (S105).
  • the second cutter 132 cuts the second electrode sheet 1121 . Then, a plurality of second electrodes 1122 are formed. 11 , when the second transfer device 142 transfers the second electrode 1122 , the second header 152 adsorbs the second electrode 1122 . And, when the second region 1222 of the separator sheet 122 covers the first electrode 1112, the second header 152 adsorbing the second electrode 1122 is the portion of the second region 1222. By moving upward, the second electrode 1122 is seated on the second region 1222 where the first adhesive layer 1710 is formed.
  • the second nozzle 172 applies the adhesive to the top of the second electrode 1122 .
  • the second nozzle 172a may form a second adhesive layer 1750 on the second electrode 1122 .
  • the separator guide 125 and the pair of pressure rollers 130 move toward the second transport device 142 based on the table 16a, the other side of the separator sheet 122 is folded and the separator sheet 122 is folded.
  • the first region 1221 of 122 covers the second electrode 1122 on which the second adhesive layer 1750 is formed.
  • 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. 12 is a cross-sectional view of an electrode assembly according to an embodiment of the present invention.
  • the electrode 11 includes a first electrode 1112 and Including the second electrode 1122, 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. 13 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, and the electrode assembly 10 together with the electrolyte It includes a battery case 50 accommodating, and the 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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  • Secondary Cells (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)

Abstract

Un appareil de fabrication d'un ensemble électrode selon un mode de réalisation de la présente invention comprend : une unité d'alimentation d'électrode dotée d'une feuille d'électrode sur laquelle une pluralité d'électrodes sont formées ; une unité d'alimentation de séparateur dotée d'une feuille de séparateur qui se plie lorsque les électrodes sont placées sur celle-ci, et qui recouvre les électrodes et est empilée avec les électrodes ; une table sur la surface supérieure de laquelle les électrodes sont placées de manière à ce que la feuille de séparateur soit pliée entre les électrodes afin de former l'ensemble électrode ; un guide de séparateur pour guider la direction de pliage de la feuille de séparateur ; une paire d'applicateurs pour appliquer un adhésif sur au moins une partie de la feuille de séparateur et/ou des électrodes placées sur la table ; et une paire de rouleaux de pression pour presser la feuille de séparateur guidée par le guide de séparateur.
PCT/KR2022/013704 2021-09-16 2022-09-14 Ensemble électrode, son appareil de fabrication et son procédé de fabrication Ceased WO2023043176A1 (fr)

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WO2023043177A1 (fr) * 2021-09-16 2023-03-23 주식회사 엘지에너지솔루션 Ensemble électrode, son appareil de fabrication et son procédé de fabrication
EP4152454A1 (fr) 2021-09-16 2023-03-22 LG Energy Solution, Ltd. Ensemble d'électrodes destiné à être utilisé dans une batterie, appareil de fabrication de celui-ci et son procédé de fabrication

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