WO2023052613A1 - Vorrichtung und verfahren zur herstellung einer elektrode - Google Patents
Vorrichtung und verfahren zur herstellung einer elektrode Download PDFInfo
- Publication number
- WO2023052613A1 WO2023052613A1 PCT/EP2022/077334 EP2022077334W WO2023052613A1 WO 2023052613 A1 WO2023052613 A1 WO 2023052613A1 EP 2022077334 W EP2022077334 W EP 2022077334W WO 2023052613 A1 WO2023052613 A1 WO 2023052613A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- depression
- belt
- strip
- electrode foil
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000011888 foil Substances 0.000 claims abstract description 72
- 238000005520 cutting process Methods 0.000 claims abstract description 37
- 238000003698 laser cutting Methods 0.000 claims abstract description 26
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 7
- 238000007373 indentation Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 22
- 238000002679 ablation Methods 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims 1
- 241000252254 Catostomidae Species 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
- B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/38—Delivering or advancing articles from machines; Advancing articles to or into piles by movable piling or advancing arms, frames, plates, or like members with which the articles are maintained in face contact
- B65H29/40—Members rotated about an axis perpendicular to direction of article movement, e.g. star-wheels formed by S-shaped members
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/72—Fuel cell manufacture
-
- 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 invention relates to a device for producing an electrode for a lithium-ion battery cell, the device comprising a conveyor belt and a laser cutting device. Furthermore, the invention relates to a method for producing an electrode, in particular using the device.
- An electrically driven motor vehicle typically has a traction battery (high-voltage battery, HV battery) which supplies an electric motor for driving the motor vehicle with energy.
- An electrically powered motor vehicle is, in particular, an electric vehicle that only stores the energy required for the drive in the traction battery (BEV, battery electric vehicle), an electric vehicle with a range extender (REEV, range extended electric vehicle), a hybrid vehicle (HEV, hybrid electric vehicle), a plug-in hybrid vehicle (PHEV, plug-in hybrid electric vehicle) and/or a fuel cell vehicle (FCEV, fuel cell electric vehicle), which temporarily stores the electrical energy generated by a fuel cell in the traction battery.
- BEV battery electric vehicle
- REEV range extended electric vehicle
- HEV hybrid vehicle
- PHEV plug-in hybrid vehicle
- FCEV fuel cell electric vehicle
- Such a traction battery which is designed as a lithium-ion battery, has at least one battery cell, which in turn comprises at least one anode and at least one cathode.
- a foil-like and strip-like electrode foil is typically provided with a coating of active material, in particular on both sides. The coating is then compacted by at least one pair of rollers of a calender. The coated electrode foil is then cut to size and/or cut off to form the individual anodes or the individual cathodes.
- a device with a conveyor belt is known from JP 2013 136437 A, by means of which electrodes are isolated from an electrode foil which is coated intermittently in the (electrode foil) longitudinal direction. To do this, the electrode foil is cut to length and cut to form the contact areas (contact lug, absorber lug) in the uncoated area.
- the band of the conveyor belt formed from steel plates has through holes. These serve to prevent the cutting tool from acting on the tape during the cutting process of the electrode foil.
- the strip-shaped electrode foil is continuously coated, with an uncoated area being provided for the contact sections (conductor lugs) in the transverse (electrode foil) direction. If the contact sections are first cut out (“notching”), however, there is a risk, particularly at comparatively high transport speeds and/or with comparatively thin electrode foils, that the cut-out contact sections will buckle or bend when the electrode foil is deflected and/or when the electrode foil is wound onto a supply roll. Due to this, the contact portions are embossed so that their flexural rigidity is increased.
- the invention is based on the object of specifying a particularly suitable method and a device for producing an electrode for a lithium-ion battery.
- the electrode should be produced in as time-saving a manner as possible and/or damage to the belt of the conveyor belt should be avoided.
- the device is intended and set up for producing an electrode for a lithium-ion battery cell.
- an electrode comprises a film-like substrate, which is also referred to below as an electrode film.
- This is designed, for example, as a metal foil, in particular an aluminum foil or a copper foil, or as a coated plastic or carbon foil.
- the electrode foil is expediently provided with a first section, preferably on both sides, with a coating that includes active material.
- Such an electrode also includes a contact section, by means of which the electrode can be electrically connected to other electrodes, a cell conductor or the like.
- the device comprises a conveyor belt with a belt, which is also referred to as a belt or as a conveyor belt.
- the conveyor belt is particularly preferably designed as a vacuum conveyor belt, with the belt expediently having through-going channels or holes, so that on a support side of the belt on which the material to be conveyed - here the coated electrode foil and/or the electrode(s) - rests, a vacuum can be generated and the good can be fixed accordingly to the belt.
- the band has on its support side (outside, upper side) a first indentation extending in the transverse direction of the band.
- the indentation is not formed continuously through the strip, ie in the manner of a groove or joint.
- a depth of the indentation is between one quarter and three quarters of the strip thickness.
- the depth of the indentation is between 2 mm and 10 mm.
- the transverse direction of the belt is to be understood as that direction which is oriented perpendicularly to a running direction (conveying direction, longitudinal direction) of the belt and perpendicularly to the normal of a plane spanned by the belt.
- the band expediently has a plurality of first indentations which are spaced equidistantly from one another in the longitudinal direction of the band. The distance between the first depressions defines the width of the electrode to be produced.
- the device also includes a laser cutting device (laser beam cutting device).
- laser cutting device laser beam cutting device
- This is used to cut an electrode foil lying on the belt, ie one conveyed with the conveyor belt, in the region of the first depression, in particular along the first depression.
- the electrode foil is cut along the depression.
- a laser beam generated by the laser cutting device is guided along the recess during cutting.
- the laser beam is aimed at the support side, so the laser cutter is aimed at the indentation of the support side.
- the laser cutting device is, for example, a laser scanner or includes several laser scanners.
- the laser cutter is a polygon laser scanner.
- the laser cutting device is therefore adjusted and/or oriented in such a way that the cutting of the electrode film takes place over the depression. Because of the indentation, the point at which the laser beam acts on the electrode foil is at a distance from the strip. In summary, the effect of the laser beam on the strip is advantageously avoided due to the first indentation and, as a result, the risk of damage to the strip and/or the risk of the electrodes being welded to the strip is reduced.
- the band has a second indentation which is L-shaped or stepped.
- This second indentation is provided for cutting out the contact section of the electrode from the electrode foil using the laser cutter.
- the second deepening is used for "notching".
- a first section of the second indentation extends, starting from the first indentation, in the longitudinal direction of the strip, that is to say transversely to the first indentation.
- a second section of the second indentation extends parallel to the first indentation towards the lateral edge of the band, that is to say in the transverse direction of the band from a middle of the band to the outside of the band.
- the second indentation is expediently arranged decentrally in the band, that is to say offset in the transverse direction of the band in relation to a central plane of the band.
- the second depression has an L-shape, it is formed from the first section as a vertical leg of the L and the second section as a horizontal leg of the L. If the second depression has a stepped shape, it is formed from the first and the second in a manner analogous to the L-shape, with a further third section of the second depression extending from a free end of the second section to an end of a further, adjacent first depression extends.
- the band expediently comprises a plurality of second indentations, the first section of which each extends starting from one of the first indentations.
- the first indentation and the second indentation are designed to be contiguous, in other words the first indentation, the second indentation, and possibly further first and second indentations form a common, uninterrupted indentation in the band.
- the material being conveyed in this case the electrode film, is cut to size in such a way that the contact sections of the electrodes protrude in the transverse direction of the belt.
- a continuously coated electrode foil is expediently used for this purpose, which has an uncoated area for the contact section at the end with respect to the transverse direction of the strip.
- the laser cutting device is expediently additionally provided and set up to cut the conveyed material in the area of the second depression, in particular along the second depression.
- the transversal cut ie the cutting to length of the electrode foil and the cutting out of the contact sections, is therefore particularly advantageously carried out together on the strip using the laser cutting device.
- the electrode foil is wound up and then fed to another device for cutting to length, the relative position of the contact sections and the transverse cut, and thus the end of the electrode in Longitudinal direction of the strip, already defined by the joint cutting process using the laser cutter. An undesired deviation from a predetermined relative position is thus advantageously avoided.
- the electrode film does not have to be wound up onto a supply roll after notching, so that advantageously embossing of the contact sections or the uncoated area of the electrode film is not necessary.
- the band has a layered structure with a carrier layer and with a support layer for the electrode foil.
- the band is formed based on the layered structure.
- the carrier layer is preferably formed from a metal, a metal alloy or glass fiber or comprises at least one of these materials, so that the tape has a comparatively high dimensional stability. Additionally or alternatively, for the carrier layer such materials are used whose absorption coefficient for the laser radiation used is comparatively low or completely transparent.
- the overlay layer forms the overlay side of the band, in other words the overlay layer is arranged on the outside of the band and faces the laser cutting device.
- the layered structure comprises a further lower layer, with the carrier layer being arranged between the support layer and the lower layer.
- the bottom layer is optional.
- a material is preferably used for the lower layer which is comparatively abrasion-resistant, flexible, thermally stable and/or easy to clean.
- a thermoplastic material or the like is suitable for this purpose, for example.
- a lower layer designed in this way offers tribological advantages in particular with regard to higher adhesive strength, so that there is no or at least a comparatively greatly reduced slip on the drive roller.
- wear on the belt, in particular on the carrier layer is reduced or can be reduced, smoother running is achieved, and/or a noise level is reduced or can be reduced.
- the first depression and/or the second depression is suitably formed by means of a groove-like recess in the overlay layer.
- the recess is continuous through the overlay layer in the direction normal to the tape.
- the first and/or second depression is therefore not formed using the carrier layer, so that the latter is particularly dimensionally stable.
- a marking for determining the position of the first indentation and/or the second indentation for the cutting process by the laser cutting device is arranged on the strip.
- a marking is preferably arranged on the strip for each of the first depressions, with the markings having the same position relative to the respectively associated first depression. The markings are thus spaced equidistantly in the longitudinal direction of the strip.
- the marking or markings are expediently arranged at the edge, ie on the outside in the transverse direction of the strip, in particular on the support layer, so that they are not covered by the electrode film even when it is being conveyed.
- the marking is, for example, a pattern on the tape, in particular a QR code, or a structure of the tape, in particular a pattern of holes in the tape.
- Slippage of the electrode foil ie relative displacement of the conveyed electrode foil to the conveyor belt, which occurs in particular due to the feeding of the electrode foil onto the conveyor belt, can advantageously be determined and possibly corrected using the marking or markings. In this way, non-uniformity in the width of the electrodes to be produced, ie their expansion in the longitudinal direction of the strip, is avoided.
- the device includes a receiving unit for receiving the electrodes from the strip, the receiving unit being driven in rotation.
- the electrodes can be picked up comparatively quickly using a rotary-driven pick-up unit, so that the production rate is advantageously increased.
- the receiving unit is designed as a stacking wheel to which the electrodes are expediently fed using the conveyor belt.
- the receiving unit comprises one, preferably more than one, gripper or sucker, by means of which the electrodes conveyed by means of the belt can be removed from the belt.
- the grippers or the suckers can be moved on a circular path about a common (first) axis of rotation.
- each of the grippers/suckers can preferably be rotated about a further (second) axis of rotation, which is parallel to the first axis of rotation. Based on the rotation of the respective gripper/sucker, its speed can be adjusted to that of the conveyor belt.
- the strip is deflected between 90° and 180°, in particular by 135°, to form a removal area for removing the electrodes by means of the receiving unit.
- the (conveying direction) direction of movement of the belt in the cutting area is between 90° and 180°, in particular using a deflection roller of the conveyor belt, inclined against the direction of movement of the belt in the removal area.
- channels for removing ablation products of the laser cutting process extend from the first depression and/or from the second depression to an underside of the band.
- the depression thus has a dual function. On the one hand, the effect of the laser on the tape is avoided, on the other hand, they are used to transport away the ablation products of the laser cutting process.
- a further aspect of the invention relates to a method for producing an electrode, which is designed as a roll-to-sheet process.
- individual electrodes are produced from a band-shaped coated electrode foil that is unwound from a supply roll.
- a device is preferably used for this purpose, which is designed in one of the variants presented above with a first and a second recess.
- the electrode foil is continuously coated, with this having an uncoated area for the contact sections at the end in the transverse direction of the electrode foil.
- the electrode foil is fed to the conveyor belt, which is designed in particular as a vacuum conveyor belt, so that the electrode foil rests on the belt of the conveyor belt and is conveyed by it.
- the electrode band does not protrude beyond the band in the transverse direction of the band.
- both a contour cut for forming the contact portion of the electrode and a transverse cut for separating the electrode from the electrode foil are performed by means of a laser beam.
- the corresponding cutting area of the electrode foil is arranged completely over the strip.
- a relative position of the contact sections to the coated area is firmly defined by the cutting to length and by the notching in a common cutting process, and a relative displacement of these to one another is avoided.
- embossing of the uncoated area of the electrode foil or the contact sections (conductor lugs) is no longer necessary.
- the electrode is removed from the strip by means of a rotary-driven receiving unit, in particular a receiving unit according to one of the variants presented in connection with the device.
- a rotary-driven receiving unit in particular a receiving unit according to one of the variants presented in connection with the device.
- the electrodes can be picked up from the strip and, if necessary, stacked or stored in a magazine relatively quickly.
- a further advantage of the invention ie of the device and the method, is that the electrode belt and the conveyor belt can be moved continuously and expediently at a constant conveying speed. A process rate is thus increased compared to a stop-and-go method.
- FIG. 1 shows a schematic of a device for producing an electrode, the device having a conveyor belt for conveying an electrode foil, a laser cutting device for cutting the electrode foil to form the electrode, and a rotary-driven receiving unit for removing the electrode from the conveyor belt,
- FIG. 2 shows a schematic plan view of the belt of the conveyor belt according to a first variant, the belt having indentations extending in the transverse direction of the belt,
- FIG. 3 shows a schematic plan view of the belt of the conveyor belt according to a second variant, the belt additionally having a second indentation extending in a stepped manner
- Fig. 4a, b shows a schematic cross section through the strip according to the section plane IVa-IVa or along the section plane IVb-IVb of Fig. 3
- FIG. 6 schematically shows a coated electrode foil and an electrode cut out of it.
- a device 2 for producing an electrode 4 for a lithium-ion battery cell is shown schematically in a side view.
- the device 2 is set up to produce at least one electrode, expediently a large number of electrodes, from a strip-shaped electrode film 6 (cf. also FIG. 6) in a roll-to-sheet process.
- the device 2 comprises a conveyor belt 8 designed as a vacuum conveyor belt, the belt 10 of which is guided and/or driven by means of deflection rollers 12 . Furthermore, the device 2 includes a laser cutting device 14 for cutting the electrode foil 6 conveyed on the belt 10 and lying on it. The band is shown in dot-dash lines in FIG. 1 for better identification of the electrode foil 6 .
- a first variant and a second variant of the belt 10 is shown schematically in a plan view.
- the band 10 has continuous vacuum channels 18, so that a vacuum can be generated on the contact side 22 of the band 10 using a pump 20 or using a compressor or the like, so that the electrode foil 6 or the electrode(s) 4 can be fixed on the tape 10.
- the band 10 has a number of first indentations 24 extending in the transverse direction Q of the band on its support side 22 .
- the first depressions 24 are arranged equidistantly in the strip 10, a width b of the electrodes 4 to be produced being defined on the basis of the distance between the first depressions 24 and one another.
- this has a number of second depressions 26 in addition to the first depression 24 .
- Each of the second depressions 26 is formed in a stepped manner.
- the second depressions 26 each extend from one of the first depressions 24 to the first depression 24 adjacent to this.
- a first section 26a of the respective second depression 26 extends, starting from the respective first depression 24, in the longitudinal direction L of the belt 10.
- a second Section 26b of the second depression 26 extends, starting from that end of the first section 26a which faces away from the first depression 24, in the transverse direction Q of a center plane of the belt 10.
- first and second sections 26a, 26b form an L-shaped depression, with the first section 26a forming the vertical leg of the L and the second section 26b forming the horizontal leg of the L.
- the first section 26a extends continuously from the first recess 24 to the second section 26b.
- a third section 26c of the second depression 26 extends in the longitudinal direction L of the belt, forming a stepped shape of the second depression 26 from the end of the second section 26b facing away from the first section 26a to the adjacent first depression 24.
- the third section 26c is optional. This is not the case, in particular, if the height hß of an uncoated section 28 of the electrode foil 6 corresponds to a predetermined height hK of the contact section 30, i.e. the extension of the contact section 30 in the electrode foil transverse direction QE (cf. also FIG. 6).
- the first indentations 24 and the second indentations 26 form a pattern that is periodically repeated in the longitudinal direction L of the strip, along which pattern the electrode foil 6 conveyed by means of the strip 10 is cut using the laser cutting device 14 .
- the electrode foil 6 is cut in the area, in particular along, the first and second indentations to form the electrode(s) using the laser cutting device 14 .
- the first depressions 24 extending in the transverse direction Q of the strip are provided for a transverse cut, ie for cutting the electrode foil 6 to length.
- the second depressions 26 are provided for cutting out the contact section 30 of the respective electrode 4 . Due to the indentations 24, 26, the electrode foil 6 is spaced apart from the strip 10 in the area in which it is cut using the laser cutting device 14, so that the laser beam emitted by the laser cutting device 14 does not affect the strip 10.
- the tape 10 has a layered structure with a carrier layer 32, which is made of a metal, an alloy, glass fibers, or a material whose absorption coefficient for the laser radiation used is very low or very high .is completely transparent.
- a support layer 34 is arranged on one side of the carrier layer.
- the carrier layer forms the support side 22 of the belt, on which the electrode foil 6 rests during conveying.
- the first recess 24 and the second recess 26 are formed like grooves.
- the first indentation 24 and the second indentation 26 therefore extend, starting from the contact side 22 , towards a (belt) underside 38 .
- Each of the first indentations 24 and each of the second indentations 26 are thus formed by means of a groove-like recess 40 in the overlay layer 34 formed. In other words, each of the first and second depressions 24, 26 extends only within the overlay layer 34.
- channels 42 each extend from the depressions 24, 26 through the band BD, ie through the carrier layer and through the lower layer. These channels 42 serve to carry away ablation products of the laser cutting process.
- a marking 44 is arranged in an edge region of the strip 10 for each first depression 24 for cutting the electrode foil 6 .
- This is designed here as a QR code, for example, and is used to determine the position of the first depression 24 for the cutting process, since the depressions 24 , 26 are covered by the electrode film 6 .
- the laser cutting device 14 accordingly comprises a detection unit (not shown), for example a camera, and an evaluation unit, which is used to set the position of the first depressions 24, 26 and, as a result, the alignment or orientation of the laser beam generated by the laser beam device 14 for the cutting .
- the strip 10 is deflected by a deflection roller 12 at an angle between 90° and 180°, here by 135° by way of example.
- a receiving area 48 is formed, in which a rotationally driven receiving unit 50 can receive the electrodes 4 from the band 10 .
- the pick-up unit 50 deposits the picked-up electrodes 4 in a stack in a magazine 58 .
- the receiving unit 50 comprises a number of grippers or suckers 60, by means of which the electrodes 4 conveyed by means of the belt 10 are removed from the belt 10.
- the grippers or the suckers 60 can be moved on a circular path about a common first axis of rotation Ri (axis of rotation).
- each of the grippers/suckers is rotatable about a second axis of rotation R2, which is parallel to the first axis of rotation Ri and runs on the circular path. Based on the rotation of the respective gripper/sucker about its second axis of rotation R2, its speed can be adapted to that of the belt 10.
- the first axis of rotation Ri of the receiving unit 50 is always parallel to the transverse direction Q of the band 10.
- FIG. 1 shows the rotation about the second axis of rotation R2 in only one direction of rotation—counterclockwise in the view of FIG.
- the respective gripper/sucker can preferably be rotated in both directions of rotation about the second axis of rotation R2.
- FIG. 5 shows a flowchart that summarizes a roll-to-sheet manufacturing method for an electrode 4 using the device shown above.
- the band-shaped electrode foil 6 (cf. FIG. 6) is unwound from a supply roll 52 using an unwinding device 54 and fed to the conveyor belt 8 .
- the strip-shaped electrode foil 6 is conveyed on the belt 10 of the conveyor belt 8 in the conveying direction F into the cutting area 46, where the electrode foil 6 is cut using the laser cutting device 14 both with a contour cut to form the contact section 30 of the respective electrode 4 and with a transverse cut to separate the respective electrode 4 is provided by the electrode foil 6 (step II.).
- the belt 10 is preferably moved at a constant speed.
- the corresponding cutting area for the transverse cut and for the contour cut for forming the contact section 30 is arranged completely over the band.
- the remnants of the electrode foil 6 remaining during the cutting are removed from the conveyor belt 8 by a cleaning concept that is not shown in detail.
- the electrode 4 that has been cut out is then conveyed from the cutting area 46 to the receiving area 48, where the electrode 4 is removed from the belt 10 by means of the rotary-driven receiving unit 50 and then deposited and stacked in the magazine 58 by means of the receiving unit 50 (step III.).
- FIG. 6 shows a schematic top view of the coated electrode foil 6 and an electrode 4 cut out of this electrode foil 6 using the device 2 and/or according to the method.
- the strip-shaped electrode film 6 has a first region 62 in which it is coated, preferably on both sides. In this case, the electrode film 6 is coated continuously, ie without interruption, in the first region 62 with respect to a longitudinal direction LE of the electrode strip.
- the electrode film 6 At the end in an electrode film transverse direction QE (electrode strip transverse direction QE) oriented perpendicularly to the electrode strip longitudinal direction LE, the electrode film 6 on the uncoated area 28, which is intended to form the contact sections 30.
- the electrode 4 is formed with the contact section 30 and a coated section 56, that is to say manufactured.
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
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- Optics & Photonics (AREA)
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3233223A CA3233223A1 (en) | 2021-10-01 | 2022-09-30 | Device and method for producing an electrode |
EP22798112.3A EP4406032A1 (de) | 2021-10-01 | 2022-09-30 | Vorrichtung und verfahren zur herstellung einer elektrode |
JP2024519693A JP2024537809A (ja) | 2021-10-01 | 2022-09-30 | 電極を製造する装置および方法 |
CN202280065757.1A CN118043981A (zh) | 2021-10-01 | 2022-09-30 | 用于制造电极的装置和方法 |
KR1020247012971A KR20240055901A (ko) | 2021-10-01 | 2022-09-30 | 전극을 제조하기 위한 장치 및 방법 |
US18/623,487 US20240238898A1 (en) | 2021-10-01 | 2024-04-01 | Device and method for producing an electrode |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021211096.7A DE102021211096A1 (de) | 2021-10-01 | 2021-10-01 | Vorrichtung und Verfahren zur Herstellung einer Elektrode |
DE102021211096.7 | 2021-10-01 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US18/623,487 Continuation US20240238898A1 (en) | 2021-10-01 | 2024-04-01 | Device and method for producing an electrode |
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WO2023052613A1 true WO2023052613A1 (de) | 2023-04-06 |
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PCT/EP2022/077334 WO2023052613A1 (de) | 2021-10-01 | 2022-09-30 | Vorrichtung und verfahren zur herstellung einer elektrode |
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Country | Link |
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US (1) | US20240238898A1 (de) |
EP (1) | EP4406032A1 (de) |
JP (1) | JP2024537809A (de) |
KR (1) | KR20240055901A (de) |
CN (1) | CN118043981A (de) |
CA (1) | CA3233223A1 (de) |
DE (1) | DE102021211096A1 (de) |
WO (1) | WO2023052613A1 (de) |
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CN118951415A (zh) * | 2024-10-21 | 2024-11-15 | 威护(上海)材料科技有限公司 | 一种3d打印机光学膜激光切割成型设备 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013136437A (ja) | 2011-12-28 | 2013-07-11 | Nissan Motor Co Ltd | 位置決め搬送装置 |
JP2018041625A (ja) * | 2016-09-07 | 2018-03-15 | 株式会社豊田自動織機 | 電極製造装置 |
Family Cites Families (3)
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KR102510296B1 (ko) | 2018-12-07 | 2023-03-15 | 주식회사 엘지에너지솔루션 | 리튬 전극 제조 장치 및 제조 방법 |
WO2020117022A1 (ko) | 2018-12-07 | 2020-06-11 | 주식회사 엘지화학 | 리튬 전극 제조 장치 및 제조 방법 |
EP3948981A1 (de) | 2019-03-27 | 2022-02-09 | Grob-Werke GmbH & Co. KG | Vorrichtung und verfahren zum bereitstellen von elektrodensträngen und zum herstellen von elektrodenanordnungen |
-
2021
- 2021-10-01 DE DE102021211096.7A patent/DE102021211096A1/de active Pending
-
2022
- 2022-09-30 EP EP22798112.3A patent/EP4406032A1/de active Pending
- 2022-09-30 KR KR1020247012971A patent/KR20240055901A/ko unknown
- 2022-09-30 CA CA3233223A patent/CA3233223A1/en active Pending
- 2022-09-30 JP JP2024519693A patent/JP2024537809A/ja active Pending
- 2022-09-30 CN CN202280065757.1A patent/CN118043981A/zh active Pending
- 2022-09-30 WO PCT/EP2022/077334 patent/WO2023052613A1/de active Application Filing
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2024
- 2024-04-01 US US18/623,487 patent/US20240238898A1/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013136437A (ja) | 2011-12-28 | 2013-07-11 | Nissan Motor Co Ltd | 位置決め搬送装置 |
JP2018041625A (ja) * | 2016-09-07 | 2018-03-15 | 株式会社豊田自動織機 | 電極製造装置 |
Also Published As
Publication number | Publication date |
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CA3233223A1 (en) | 2023-04-06 |
JP2024537809A (ja) | 2024-10-16 |
KR20240055901A (ko) | 2024-04-29 |
DE102021211096A1 (de) | 2023-04-06 |
CN118043981A (zh) | 2024-05-14 |
EP4406032A1 (de) | 2024-07-31 |
US20240238898A1 (en) | 2024-07-18 |
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