WO2023068815A1 - 전극시트의 노칭시스템 - Google Patents
전극시트의 노칭시스템 Download PDFInfo
- Publication number
- WO2023068815A1 WO2023068815A1 PCT/KR2022/015970 KR2022015970W WO2023068815A1 WO 2023068815 A1 WO2023068815 A1 WO 2023068815A1 KR 2022015970 W KR2022015970 W KR 2022015970W WO 2023068815 A1 WO2023068815 A1 WO 2023068815A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode sheet
- protective film
- notching
- electrode
- sheet
- Prior art date
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 95
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims description 10
- 239000011267 electrode slurry Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 11
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000006256 anode slurry Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006257 cathode slurry Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- 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
- B26F1/12—Perforating by punching, e.g. with relatively-reciprocating punch and bed to notch margins of work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
-
- 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
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
-
- 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
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- 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
Definitions
- the present invention is a notching system for an electrode sheet in which slurry is applied to the surface of a current collector made of thin metal. It relates to a notching system for electrode sheets that can
- Lithium secondary batteries which are chargeable and dischargeable, light, and have high energy density and power density, are widely used as energy sources for various devices.
- HEVs hybrid electric vehicles
- PHEVs plug-in hybrid electric vehicles
- BEV battery electric vehicles
- EV electric vehicles
- Such a secondary battery generally includes an electrode assembly having a structure in which electrodes (cathode, anode) and separators are alternately stacked, an electrolyte (electrolyte) for moving ions to the electrodes, and a case accommodating the electrode assembly and the electrolyte.
- the manufacturing process of the secondary battery is largely an electrode plate process of manufacturing a positive electrode and a negative electrode, an assembly process of manufacturing a positive electrode and a negative electrode into an electrode assembly and then inserting the electrode assembly together with electrolyte into a case, and activating ion movement of the electrode assembly. It can be divided into forming processes, and each of the electrode plate process, assembling process, and forming process is divided into individual detailed processes.
- the electrode plate process includes a mixing process of adding and mixing an active material, a conductive material, and a binder to prepare a slurry, a coating process of applying the mixed slurry on a current collector, a press process of pressurizing the slurry on the surface of the current collector, and A notching process (notching process) of cutting the slurry-adhered electrode sheet to size (or at the same time as cutting) and performing shearing to form an electrode tab (notching process), and the like.
- the holding portion to which the slurry is applied (coated) and the uncoated portion to which the slurry is not applied are formed on the current collector. That is, the electrode sheet has a structure in which the slurry is coated in a narrower width than the current collector, but the slurry is not applied to the middle portion along the longitudinal direction, and the holding portion is provided on both sides and the uncoated portion is formed therebetween (see FIG. 3).
- the notching process is performed by punching the notching device 7 so that the remaining portion is cut except for the electrode tab (T: see FIG. 3).
- the notching device 7 includes a lower mold disposed under the electrode sheet 1 and an upper mold disposed above the electrode sheet 1, and the upper mold descends to hit the uncoated portion of the electrode sheet 1 to process the electrode tab T at the uncoated portion. do.
- the conventional notching system of the electrode sheet includes an electrode unwinder 5 in which the electrode sheet 1 is unwound and continuously supplied, and the electrode sheet (1) is disposed in the conveying path and includes a notching device (6) for notching the electrode tab at the uncoated portion and a rewinder (8) for winding the 'notched electrode sheet' (1a). And, rollers 6 for changing the transport path of the electrode substrate 1 may be included.
- the current collector is made of copper and has a structure in which a negative electrode slurry is applied, and when the electrode sheet 1 is a positive electrode, the current collector is made of aluminum and a positive electrode slurry is applied.
- the main purpose of the present invention is to provide a notching system for an electrode sheet that can prevent the problem of tearing, cutting or damage of the electrode sheet and solve the problem of scratches due to graphite smearing on the surface of the electrode sheet there is
- the present invention for achieving the above object is a notching system for an electrode sheet in which a slurry is applied to the surface of a current collector, comprising: an electrode unwinder from which the electrode sheet is unwound; a film unwinder for unwinding the protective film laminated on the electrode sheet; a notching device for notching an uncoated portion of the electrode sheet, which is a portion to which slurry is not applied, when the protective film is provided on the electrode sheet in a laminated state; and a rewinder in which the notched electrode sheet is wound.
- a tension roller disposed on a path along which the electrode sheet and the protective film are transported in a stacked state, and applying pressure to the electrode sheet and the protective film by sliding in a predetermined direction to maintain tension within a predetermined range.
- a portion of the protective film protrudes from each side of the electrode sheet and has a width larger than that of the electrode sheet.
- the electrode sheet is a cathode sheet coated with a cathode slurry on the surface of a cathode current collector, and the protective film is laminated to be positioned on the bottom surface of the cathode sheet when the cathode sheet enters the notching device.
- the electrode sheet is a negative electrode sheet coated with a negative electrode slurry on the surface of the negative electrode current collector, and when the negative electrode sheet enters the notching device, the film unwinds so that the protective film is stacked on the upper and lower surfaces of the negative electrode sheet, respectively. Further, a first film unwinder in which the protective film laminated on the lower surface of the electrode sheet is unwound; and a second film unwinder in which the protective film stacked on the upper surface of the electrode sheet is unwound.
- the protective film When the protective film is laminated with the electrode sheet, the protective film has a width larger than that of the electrode sheet so that a portion protrudes from each side of the electrode sheet, and the protective film laminated on the lower surface of the electrode sheet and the upper surface of the electrode sheet are laminated.
- the protective film is aligned so that both ends are aligned along the width direction with the electrode sheet interposed therebetween.
- the uncoated portion is formed to be located at the center along the longitudinal direction of the electrode sheet, and the electrode sheet and the protective film are divided into a first processing body and a second processing body by performing notching processing so as to cut the uncoated portion in a notching device.
- the rewinder may include a first rewinder around which the first processing body is wound; and a second rewinder around which the second processing body is wound.
- One of the first rewinder and the second rewinder is positioned at a lower height than the notching device, and the other is positioned at a higher height than the notching device.
- the notching device may include a lower mold disposed under the electrode sheet; and an upper mold disposed on the electrode sheet, and when the electrode sheet is positioned between the lower and upper molds, the upper mold or lower mold strikes the uncoated portion of the electrode sheet to be formed into a predetermined shape.
- It is configured to further include; a film recovery device that separates and recovers the protective film from the notched electrode sheet.
- the protective sheet can suppress cutting by dispersing the tension applied to the electrode sheet, and since the surface of the electrode sheet is covered by the protective film, separation of graphite powder can be fundamentally prevented.
- the tension applied to the electrode sheet being transferred can be easily adjusted by further including a tension roller.
- the protective film When the protective film is laminated with the electrode sheet, the protective film is configured to have a larger width than the electrode sheet so that a portion protrudes from each side of the electrode sheet, so that when the electrode sheet and the protective film are attached, the electrode sheet is in place. Even if it is out of the protective film, it is possible to lower the possibility of being out of the protective film.
- the electrode sheet is divided into a first processing body and a second processing body through a notching process, and is recovered from each of the first rewinder and the second rewinder, and can be collected for each processed product.
- a film recovery device for separating and recovering the protective film from the notched electrode sheet may be further included, so that the protective film may be provided in a removed state.
- FIG. 1 is a simplified view of a conventional notching system
- FIG. 2 is a simplified view of a notching system according to a first embodiment of the present invention
- FIG. 3 is a view showing a state in which notching processing is performed in a notching device and an enlarged state of a notched part.
- FIG. 4 is a simplified view of a notching system according to a second embodiment of the present invention.
- the present invention relates to a notching system for an electrode sheet capable of preventing or minimizing cutting and scratching of an electrode sheet.
- the notching process is performed while the protective film 2 is laminated on one surface of the electrode sheet 1, thereby providing a notching system capable of preventing the electrode sheet 1 from being cut during the process as a first embodiment. .
- the notching system provided in this embodiment includes an electrode unwinder 10, a film unwinder 20, and a notching device. (40) and a rewinder (50).
- the electrode unwinder 10 continuously unwinds the electrode sheet 1 by rotating in a direction in which the slurry-coated electrode sheet 1 is wound on the surface of the current collector and unwinding.
- the electrode sheet 1 provided in this embodiment can be used as a negative electrode sheet, but it is provided for the purpose of relatively simplifying the process and reducing production costs while preventing cutting or damage of the electrode sheet 1, so that the positive electrode Sheets are preferably used. That is, the electrode sheet 1 provided in this embodiment is provided by coating a positive electrode slurry on the surface of a positive electrode current collector made of aluminum.
- the film unwinder 20 has a protective film 2 wound thereon.
- the protective film 2 is wound to have a longer length than the electrode sheet 1 so that it can be continuously unwound while the unwinding of the electrode sheet 1 continues.
- the protective film 2 and the electrode sheet 1 are unwound, meet during the transfer path, and are laminated (matched) and stacked. are transferred
- the protective film is laminated before passing the roller that passes first in the conveying path among the plurality of rollers 61, and while each roller 61 is moved in a laminated state. Adhesion between (2) and the electrode sheet (1) is achieved.
- the protective film 2 when the protective film 2 is laminated with the electrode sheet 1, the It has a slightly larger width than the electrode sheet 1 so that a portion protrudes from each side of the electrode sheet 1.
- the slurry-coated (coated) holding portion 1" and the slurry-uncoated portion 1 ') is formed on the surface of the current collector. As shown, it has a structure in which a non-coated portion 1' is formed in the middle along the longitudinal direction with the holding portions 1" on both sides to which the slurry is applied interposed.
- the protective film 2 further protrudes by a predetermined length from each end of the holding portion 1" on both sides of the current collector in the width direction (vertical direction in FIG. 3).
- the protective film 2 is transported through a plurality of rollers 61 in a laminated state with the electrode sheet 1 as shown in FIG. 3, and at least one of the plurality of rollers 61 is It consists of a tension roller 60 capable of rotation and sliding.
- the tension roller 60 is disposed in a path along which the electrode sheet 1 and the protective film 2 are transported in a stacked state, and moves in a predetermined direction (e.g., in a vertical direction with respect to FIG. 2 or Left and right direction, etc.) is configured to maintain the tension within a predetermined range by applying pressure to the electrode sheet 1 and the protective film 2 by sliding to and fro.
- a predetermined direction e.g., in a vertical direction with respect to FIG. 2 or Left and right direction, etc.
- the electrode sheet 1 and the protective film 2 While being transported through a plurality of rollers 61, the electrode sheet 1 and the protective film 2 enter the notching device 40 in a state in which the transport directions are different, but remain horizontal. At this time, the protective film 2 enters a state located on the bottom surface of the electrode sheet 1. That is, based on FIG. 2 , the protective film 2 is placed below and the electrode sheet 1 is placed on top of the notching device 40 .
- the uncoated portion 1' which is a portion of the electrode sheet 1 where the slurry is not applied, is notched. do.
- the notching device 40 includes a lower mold 42 disposed below the electrode sheet 1 and an upper mold 41 disposed above the electrode sheet 1. And, when the electrode sheet 1 is positioned between the lower mold 42 and the upper mold 41, as shown in FIG. 3, the upper mold 41 and the lower mold 42 (or only one of the upper mold and the lower mold) are vertically By sliding in the direction and striking (punching), the notching process is performed so that the electrode tab T is formed in a predetermined shape in the uncoated portion 1' of the electrode sheet 1.
- the uncoated portion 1' is removed except for the electrode tab T. Therefore, as shown in FIG. 3, the electrode tabs T are formed on both sides of the uncoated portion 1', and the electrode sheet 1 and the protective film 2 are moved in the longitudinal direction in the notching device 40. It is divided into a first processing body (1a') and a second processing body (1a").
- the rewinder 50 separately winds the first and second processing bodies 1a' and 1a" of the notched electrode sheet 1.
- the rewinder 50 includes a first rewinder 50a around which the first processing body 1a' is wound and a second rewinder 50b around which the second processing body 1a" is wound.
- One of the first rewinder 50a and the second rewinder 50b is positioned at a lower height than the notching device 40, and the other is positioned at a higher height than the notching device 40, and is independently controlled.
- the first processing body 1a' and the second processing body 1a" are wound. At this time, the first processing body 1a' and the second processing body 1a" are respectively connected to the first rewinder 50a and the second processing body 50a.
- the tension roller 60 and the rollers that change the driving path may be selectively disposed even during the path moving to the 2 rewinder 50b.
- the first processing body 1a' and the second processing body 1a" are wound in a state where the protective film 2 is laminated on the electrode sheet 1.
- the first processing body 1a' A film recovery device (not shown) may be added to separate and recover the protective film 2 from the electrode sheet 1 before the second processing body 1a" is put into the next process.
- the film recovery device winds only the protective film 2 when the first processing body 1a' and the second processing body 1a" are separated from the first and second rewinders 50a and 50b.
- the film recovery device may be provided in the form of separating the first rewinder 50a in a state in which the ends of the protective film 2 are fixed in the first processing body 1a' and the second processing body 1a". And it may be provided to have a structure that separates only the protective film 2 by rotating and winding simultaneously with the second rewinder 50b or to have another known separator structure.
- the film recovery device is disposed before reaching the first rewinder 50a and the second rewinder 50b to protect the protective film 2 from the notched first processing body 1a' and the second processing body 1a". ) may be removed and only the electrode sheet 1 may be wound around the first rewinder 50a and the second rewinder 50b.
- the notching process is performed in a state where the protective films 2 and 3 are laminated on both sides of the electrode sheet 1, thereby providing a notching system capable of preventing scratches caused by the graphite powder as a second embodiment. .
- the notching system provided in this embodiment also includes an electrode unwinder 10, a film unwinder 20, It is composed of a notching device 40 and a rewinder 50.
- the electrode sheet 1 provided in this embodiment can also be used as a cathode electrode sheet, but if the purpose is only to prevent cutting and breaking, it is sufficient to provide the protective film 2 on only one side, so that the first embodiment
- the notching system according to the present invention is more preferable in terms of production cost. Therefore, since the purpose of this embodiment is to prevent scratches caused by scattering or smearing of graphite powder on the electrode sheet 1, it is preferable to use a negative electrode sheet. That is, the electrode sheet 1 provided in this embodiment is provided by coating a negative electrode slurry on the surface of a negative electrode current collector made of copper.
- the film unwinder 20 includes a first film unwinder 20a from which the protective film 2 laminated on the lower surface of the electrode sheet 1 is unwound and a protective film laminated on the upper surface of the electrode sheet 1. (3) is configured to include a second film unwinder (20b) to be unwound (at this time, the reference of the upper and lower surfaces is based on the vertical direction when entering the notching device).
- the protective films 2 and 3 wound around the first film unwinder 20a and the second film unwinder 20b may be basically provided to have the same material and the same thickness, but with a notching device.
- the protective films 2 and 3 on the side to be hit may be formed thinner or different in material so as not to affect workability or to minimize the effect.
- the protective films 2 and 3 provided in each of the first film unwinder 20a and the second film unwinder 20b have a longer length than the electrode sheet 1 and are wound to form the electrode sheet 1 While unwinding continues, each can be unwound without interruption.
- the protective films 2 and 3 and the electrode sheet 1 are unwound and transported. They meet during the path to be stacked, and are transported in a stacked state.
- stacking is performed before passing the first roller in the conveying path among the plurality of rollers 61, and while each roller 61 moves in a stacked state, the electrode sheet ( The protective films 2 and 3 are adhered to each other on both sides of 1).
- the protective films 2 and 3 when the protective films 2 and 3 are stacked with the electrode sheet 1, a width greater than that of the electrode sheet 1 so that a portion protrudes from each side of the electrode sheet 1. have At this time, the protective films 2 and 3 laminated on one side and the other side of the electrode sheet 1 are provided to have the same width.
- the protective film 2 laminated on the bottom surface of the electrode sheet 1 and the protective film 3 laminated on the upper surface of the electrode sheet 1 have both ends along the width direction with the electrode sheet 1 interposed therebetween. The ends are aligned so that they fit.
- the protective films 2 and 3 protrudes along the width direction from the electrode sheet 1 so as to block the movement of the electrode sheet 1 during the notching process, so that the protective films 2 and 3 are separated from each other.
- Adhesive may be additionally applied to the facing part to be bonded in alignment with another protective film. Accordingly, since the electrode sheet 1 can be notched in a state in which movement is blocked between the protective films 2 and 3, the defect rate can be reduced and more precise notching can be performed.
- the uncoated portion 1' is formed to be located at the center along the longitudinal direction of the electrode sheet 1, and the electrode sheet 1 and the protective films 2 and 3 are formed in the notching device 40. Notching processing is performed so that the uncoated portion 1' is cut, so that it is divided into a first processing body 1a' and a second processing body 1a".
- the rewinder 50 also has a first processing body ( It is composed of a first rewinder 50a on which 1a') is wound and a second rewinder 50b on which the second processing body 1a" is wound, and the first processing body 1a' and the second processing body 1a" are wound. ”) is configured to wind each.
- the notching device 40 provided in this embodiment also has a structure including a lower mold 42 disposed below the electrode sheet 1 and an upper mold 41 disposed above the electrode sheet 1. and hit the uncoated portion 1' to form the electrode tab T.
- a film recovery device (not shown) may be further included to separate and recover the protective films 2 and 3 from the notched electrode sheet 1 .
- the film recovery device has a structure coupled to the upper mold 41 or the lower mold 42 and may be configured to peel off the protective films 2 and 3 while passing through the notching device 40 .
- the protective sheet can suppress cutting by dispersing the tension applied to the electrode sheet, and since the surface of the electrode sheet is covered by the protective film, separation of graphite powder can be fundamentally prevented.
- the tension applied to the electrode sheet being transferred can be easily adjusted by further including a tension roller.
- the protective film When the protective film is laminated with the electrode sheet, the protective film is configured to have a larger width than the electrode sheet so that a portion protrudes from each side of the electrode sheet, so that when the electrode sheet and the protective film are attached, the electrode sheet is in place. Even if it is out of the protective film, it is possible to lower the possibility of being out of the protective film.
- the electrode sheet 1 is notched and divided into a first processing body 1a' and a second processing body 1a", and is recovered from the first rewinder and the second rewinder, respectively, and can be collected for each processed product. do.
- a film recovery device for separating and recovering the protective film from the notched electrode sheet may be further included, so that the protective film may be provided in a removed state.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims (10)
- 집전체의 표면에 슬러리가 도포된 전극시트의 노칭시스템으로써,전극시트가 권출되는 전극언와인더;상기 전극시트에 적층되는 보호필름이 권출되는 필름언와인더;상기 전극시트에 보호필름이 적층된 상태로 제공되면, 상기 전극시트에서 슬러리가 미도포된 부분인 무지부를 노칭가공하는 노칭장치; 및노칭가공된 전극시트가 권취되는 리와인더;를 포함하는 전극시트의 노칭시스템.
- 제 1 항에 있어서,상기 전극시트와 보호필름이 적층된 상태로 이송되는 경로 중에 배치되되, 미리 정해진 방향으로 활주함으로써 상기 전극시트와 보호필름에 압력을 가해 미리정해진 범위 내로 장력을 유지시키는 텐션롤러를 더 포함하는 전극시트의 노칭시스템.
- 제 1 항에 있어서,상기 보호필름은 전극시트와 적층됐을 때, 상기 전극시트의 양측 각각으로 일부분이 돌출되도록 상기 전극시트 보다 더 큰 폭을 갖는 전극시트의 노칭시스템.
- 제 1 항에 있어서,상기 전극시트는 양극집전체의 표면에 양극슬러리가 도포된 양극시트이고,상기 보호필름은 양극시트가 노칭장치로 진입할 때, 상기 양극시트의 저면에 위치하도록 적층된 전극시트의 노칭시스템.
- 제 1 항에 있어서,상기 전극시트는 음극집전체의 표면에 음극슬러리가 도포된 음극시트이고,상기 음극시트가 노칭장치로 진입할 때, 상기 보호필름이 음극시트의 상면과 저면 각각에 위치하게 적층되도록 상기 필름언와인더는, 상기 전극시트의 저면에 적층되는 보호필름이 권출되는 제1필름언와인더; 및 상기 전극시트의 상면에 적층되는 보호필름이 권출되는 제2필름언와인더;를 포함하는 전극시트의 노칭시스템.
- 제 5 항에 있어서,상기 보호필름은 전극시트와 적층됐을 때, 상기 전극시트의 양측 각각으로 일부분이 돌출되도록 상기 전극시트 보다 더 큰 폭을 갖고,상기 전극시트의 저면에 적층된 보호필름과 상기 전극시트의 상면에 적층된 보호필름은 전극시트를 사이에 두고 폭 방향을 따라 양끝단이 맞춰지도록 정렬된 전극시트의 노칭시스템.
- 제 1 항에 있어서,상기 무지부는 전극시트의 길이방향을 따라 중앙에 위치하도록 형성되고,상기 전극시트와 보호필름은 노칭장치에서 상기 무지부가 절단되도록 노칭가공이 이뤄져 제1가공체와 제2가공체로 나눠지게 되며,상기 리와인더는,상기 제1가공체가 권취되는 제1리와인더; 및 상기 제2가공체가 권취되는 제2리와인더;를 포함하는 전극시트의 노칭시스템.
- 제 7 항에 있어서,상기 제1리와인더와 제2리와인더 중 어느 하나는 노칭장치 보다 더 낮은 높이에 위치하고, 다른 하나는 노칭장치 보다 더 높은 높이에 위치하도록 배치된 전극시트의 노칭시스템.
- 제 1 항에 있어서,상기 노칭장치는,상기 전극시트 아래에 배치되는 하형; 및 전극시트 위에 배치되는 상형;을 포함하고,전극시트가 상기 하형과 상형 사이에 위치됐을 때, 상형 또는 하형이 상기 전극시트의 무지부를 타격하여 미리 정해진 모양으로 성형되도록 가공하는 전극시트의 노칭시스템.
- 제 1 항 내지 제 9 항 중 어느 한 항에 있어서,노칭가공된 전극시트에서 보호필름을 분리해 회수하는 필름회수장치;를 더 포함하는 전극시트의 노칭시스템.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22884037.7A EP4391204A1 (en) | 2021-10-19 | 2022-10-19 | Notching system for electrode sheet |
JP2024520068A JP2024536327A (ja) | 2021-10-19 | 2022-10-19 | 電極シートのノッチングシステム |
CN202280058026.4A CN117882243A (zh) | 2021-10-19 | 2022-10-19 | 用于电极片的切口系统 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020210139571A KR20230055782A (ko) | 2021-10-19 | 2021-10-19 | 전극시트의 노칭시스템 |
KR10-2021-0139571 | 2021-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023068815A1 true WO2023068815A1 (ko) | 2023-04-27 |
Family
ID=86059461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2022/015970 WO2023068815A1 (ko) | 2021-10-19 | 2022-10-19 | 전극시트의 노칭시스템 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4391204A1 (ko) |
JP (1) | JP2024536327A (ko) |
KR (1) | KR20230055782A (ko) |
CN (1) | CN117882243A (ko) |
WO (1) | WO2023068815A1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20130073300A (ko) * | 2011-12-23 | 2013-07-03 | 주식회사 디에이테크놀로지 | 이차전지의 전극 노칭장치 |
KR20150062839A (ko) * | 2013-11-29 | 2015-06-08 | 주식회사 엘지화학 | 레이저 노칭장치 |
JP2019125499A (ja) * | 2018-01-17 | 2019-07-25 | 株式会社エンビジョンAescエナジーデバイス | リチウムイオン電池用電極の製造方法およびリチウムイオン電池の製造方法 |
KR20210104264A (ko) * | 2020-02-17 | 2021-08-25 | 주식회사 엘지에너지솔루션 | 전극 제조방법 및 이에 사용되는 전극 제조장치 |
WO2021182656A1 (ko) * | 2020-03-10 | 2021-09-16 | 엘지전자 주식회사 | 이차전지의 전극판 제조장치 및 제조방법 |
-
2021
- 2021-10-19 KR KR1020210139571A patent/KR20230055782A/ko active Search and Examination
-
2022
- 2022-10-19 WO PCT/KR2022/015970 patent/WO2023068815A1/ko active Application Filing
- 2022-10-19 CN CN202280058026.4A patent/CN117882243A/zh active Pending
- 2022-10-19 EP EP22884037.7A patent/EP4391204A1/en active Pending
- 2022-10-19 JP JP2024520068A patent/JP2024536327A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20130073300A (ko) * | 2011-12-23 | 2013-07-03 | 주식회사 디에이테크놀로지 | 이차전지의 전극 노칭장치 |
KR20150062839A (ko) * | 2013-11-29 | 2015-06-08 | 주식회사 엘지화학 | 레이저 노칭장치 |
JP2019125499A (ja) * | 2018-01-17 | 2019-07-25 | 株式会社エンビジョンAescエナジーデバイス | リチウムイオン電池用電極の製造方法およびリチウムイオン電池の製造方法 |
KR20210104264A (ko) * | 2020-02-17 | 2021-08-25 | 주식회사 엘지에너지솔루션 | 전극 제조방법 및 이에 사용되는 전극 제조장치 |
WO2021182656A1 (ko) * | 2020-03-10 | 2021-09-16 | 엘지전자 주식회사 | 이차전지의 전극판 제조장치 및 제조방법 |
Also Published As
Publication number | Publication date |
---|---|
JP2024536327A (ja) | 2024-10-04 |
KR20230055782A (ko) | 2023-04-26 |
CN117882243A (zh) | 2024-04-12 |
EP4391204A1 (en) | 2024-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014042424A1 (ko) | 2차 전지 내부 셀 스택 방법 및 이를 이용하여 제조되는 셀 스택 | |
WO2014123363A1 (ko) | 스텝 유닛셀을 포함하는 단차를 갖는 전극 조립체 | |
WO2018097606A1 (ko) | 전극조립체 제조 장치 및 그 전극조립체 제조 장치에 의한 전극조립체 제조 방법 | |
WO2018236033A1 (ko) | 이차전지용 플라즈마 발생장치 및 그를 포함하는 라미네이션 시스템 | |
WO2015030333A1 (ko) | 폴리머 2차전지 셀용 전극조립체 | |
WO2013151233A1 (ko) | 배터리셀 | |
WO2020197266A1 (ko) | 이차전지용 전극 제조장치와, 이를 통해 제조된 이차전지용 전극 및 이차전지 | |
WO2020141903A1 (ko) | 단위 셀 제조 장치 및 방법 | |
WO2021080101A1 (ko) | 각형 이차전지 셀 제조 장비에서 분리막의 접힘성을 향상시키기 위한 장치 및 방법 | |
WO2021235911A1 (ko) | 전극, 이차 전지, 전극 제조 장치 및 방법 | |
WO2018207999A1 (ko) | 이차전지, 그의 제조장치 및 방법 | |
WO2023068815A1 (ko) | 전극시트의 노칭시스템 | |
WO2010062037A2 (ko) | 이차전지 제조방법 및 이차전지 | |
WO2019208912A1 (ko) | 전극 조립체 및 그 전극 조립체 제조방법 | |
WO2018012789A1 (ko) | 이차전지 | |
WO2021080239A1 (ko) | 전극 조립체 제조방법 및 이를 통해 제조된 전극 조립체 | |
WO2021112551A1 (ko) | 전극 조립체 제조장치와, 이를 통해 제조된 전극 조립체 및 이차전지 | |
WO2022108335A1 (ko) | 이차전지 및 그 제조방법 | |
WO2022014933A1 (ko) | 테이프 제거 장치 | |
WO2020218891A1 (ko) | 이차전지용 전극 노칭장치와, 이를 통해 제조된 이차전지용 전극 및 이차전지 | |
WO2024085542A1 (ko) | 공정성이 개선된 전극 조립체 제조 방법 및 이를 사용하여 제조된 전극 조립체 | |
WO2020004759A1 (ko) | 전극 조립체 제조방법 | |
WO2024053977A1 (ko) | 전극 조립체 제조 장치 및 이를 사용한 제조 방법 | |
WO2023234756A1 (ko) | 전극 조립체 이송 트레이 | |
WO2023106755A1 (ko) | 전극의 레이저 노칭에 사용되는 전극 제조 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22884037 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280058026.4 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022884037 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2022884037 Country of ref document: EP Effective date: 20240319 |
|
ENP | Entry into the national phase |
Ref document number: 2024520068 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |