WO2013079570A1 - Électrodes pour batteries lithium-ion et leur fabrication - Google Patents

Électrodes pour batteries lithium-ion et leur fabrication Download PDF

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Publication number
WO2013079570A1
WO2013079570A1 PCT/EP2012/073909 EP2012073909W WO2013079570A1 WO 2013079570 A1 WO2013079570 A1 WO 2013079570A1 EP 2012073909 W EP2012073909 W EP 2012073909W WO 2013079570 A1 WO2013079570 A1 WO 2013079570A1
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WO
WIPO (PCT)
Prior art keywords
collector
region
strip
current collector
uncoated
Prior art date
Application number
PCT/EP2012/073909
Other languages
German (de)
English (en)
Inventor
Henry Bensler
Klaus DRÖDER
Lars GREWE
Markus Pompetzki
Werner Schreiber
Original Assignee
Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg
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
Application filed by Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg filed Critical Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg
Publication of WO2013079570A1 publication Critical patent/WO2013079570A1/fr

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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
    • 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
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • 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
    • H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • 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 relates to a method for the production of electrodes for lithium-ion batteries and to current collectors for such electrodes and to electrodes which can be produced according to the method.
  • the term "battery” originally meant several galvanic cells connected in series, but today also individual galvanic cells are often referred to as “battery.”
  • an energy-supplying chemical reaction takes place, which consists of two electrically coupled but spatially separated
  • electrons are released in an oxidation process, resulting in an electron current via an external load to the positive electrode, from which a corresponding amount of electrons is taken in.
  • a reduction process takes place.
  • Lithium-ion batteries often contain a stack of cells consisting of several single cells. However, especially batteries with very high capacities usually have winding cells (coils). These can be produced at a very high speed and, associated with this, at comparatively low costs. Winding cell technology is suitable for the construction of prismatic cells as well as round cells.
  • the cells of a lithium-ion battery are usually a composite of electrode and separator foils with the sequence positive electrode / separator / negative electrode.
  • Such individual cells are produced as so-called bicellas with the possible sequences negative electrode / separator / positive electrode / separator / negative electrode or positive electrode / separator / negative electrode / separator / positive electrode.
  • the electrodes usually comprise metallic current collectors, which are usually in the form of flat structures.
  • these are usually nets or films of aluminum, for example of expanded aluminum metal or of a perforated aluminum foil.
  • networks or films of copper are usually used as collectors.
  • the cells described for lithium-ion batteries are produced in a multi-stage process.
  • Such methods are known, for example, from DE 10 2010 032 770 A1 or from US 2010/0081052 A1.
  • the mentioned electrode films are produced in a first step and then subsequently combined with one or more separator films to form the mentioned electrode-separator composites. In most cases, electrodes and separators are connected to one another in a lamination step.
  • a flat strip of a paste-shaped electrode material (in short: electrode paste) is usually applied to a suitable collector.
  • this is usually achieved by providing the collectors as quasi-endless bands (in short collector plates) which pass through a coating device in which they are coated with the electrode paste by means of a doctor blade or by means of a nozzle.
  • a coating device in which they are coated with the electrode paste by means of a doctor blade or by means of a nozzle.
  • usually only one center strip of the collector belt is coated, in contrast to the strip areas of the collector belts remain free of Electrode material. These uncoated areas can be used to connect current conductors to the collectors.
  • the strips of the electrode material can be separated from one another by a cut through these uncoated regions, for example by means of a laser.
  • the coated collector strips are then usually subjected to calendering.
  • Calendering refers to the pressurization of the collector tape coated with the electrode material, whereby two rolls are used which form a gap which is smaller than the starting thickness of the coated collector tape. Through this gap, the coated collector belt is guided and compacted. It is also possible to set specifically defined porosities of the coating.
  • the calender rollers often exert such a strong pressure on the coated collector belt during calendering that the collector belt is deformed, in particular lengthened in the longitudinal direction.
  • the problem with this is that this deformation occurs only in the areas coated with electrode material areas of the collector belt, since only on these areas, the pressure of the calender rolls is transmitted.
  • the areas of the collector belt that are not covered by electrode material can pass undeformed through the calender rollers, since their thickness is less than the width of the gap between the rollers. This is problematic insofar as the ribbon-shaped electrode issuing from the calender can buckle and distort to reduce stresses that occur due to the partial deformation. This can be Working the electrode to electrode winding cause great problems.
  • the present invention has for its object to find a solution to this problem.
  • the inventive method is used in particular for the production of electrodes for lithium-ion batteries, ie of batteries, in which during charging and discharging processes lithium ions migrate from one electrode to another.
  • a strip-shaped current collector in short: collector strip
  • a coating device in which a strip of an electrode material is applied to at least one side of the collector strip.
  • strips of electrode material are applied to both sides of the collector belt.
  • the inventive method also includes the initially mentioned variant, according to which two or more strips of electrode material are applied in parallel side by side on the collector belt.
  • the application of the strip or strips is usually carried out by means of a doctor device or a nozzle.
  • the electrode material must be be provided speaking form, for example as Rakel or printable paste.
  • the current collector used is usually a band of an electrically conductive material, in particular of a metal.
  • Pastes comprising electrochemically active particles, an electrode binder and a solvent or suspending agent are generally used as the electrode material.
  • the current collector is a current collector made of aluminum and the electrode material is a material for the positive electrode of lithium-ion batteries.
  • the current collector is a current collector made of copper and the electrode material is material for the negative electrode of a lithium-ion battery.
  • An example of a material for the negative electrode of a lithium-ion battery would be a paste comprising graphite particles as electrochemical active material, sodium carboxymethylcellulose as electrode binder and possibly carbon black as a conductivity additive.
  • a corresponding paste for the positive electrode could comprise, for example, lithium cobalt oxide as electrochemical active material and also polyvinylidene fluoride as electrode binder and carbon black as conductivity additive.
  • the electrode material is preferably also applied to the collector band in such a way that at least one region of the collector band is arranged next to and / or between the strip or strips. the uncoated remains.
  • a central region of the electrode strip is coated with an electrode strip, while uncoated edge regions remain next to the electrode strip, which can subsequently serve for electrically contacting the electrode.
  • areas of the collector belt usually remain uncoated between the strips, as a rule in addition to the uncoated edge areas.
  • the method according to the invention comprises a laminating step, in which the electrode material applied to the current collector is compressed in a calendering device (calender).
  • calendering devices and their use for compaction of electrodes are familiar to the person skilled in the art and likewise need not be described in detail in the context of the present application. It is only important that a calendering device is used, in which the coated collector belt is guided through a gap between two calender rolls, which has a gap width which is smaller than the thickness of the electrode material coated collector belt, but larger than the thickness of the (uncoated) collector belt.
  • the method according to the invention is characterized by a processing step in which at least one of the uncoated regions of the collector belt, ie
  • At least one of the edge regions and one or more uncoated intermediate regions between two electrode strips arranged parallel to one another on the collector strip is placed either directly in a longitudinally extended state or in a state in which the at least one uncoated area is more resilient to elongation in the longitudinal direction.
  • More yielding to elongation in the longitudinal direction is intended to mean that the at least one uncoated region can be more easily deformed after forming by a tensile force in the longitudinal direction of the collector belt than before.
  • a longitudinally extended state is to be understood as meaning that the at least one uncoated region is stretched in the longitudinal direction.
  • the processing step is preferably a forming step, that is to say that preferably the forming of the uncoated edge region takes place.
  • the processing step may also include a material-removing step and / or a separation process, or the processing step is such a step.
  • a method for producing electrodes with such a processing step is not known from the prior art.
  • the processing step is intended to prevent or at least reduce the stresses occurring during the calendering as a result of the deformation of the region of the collector belt covered with electrode material, so that the aforementioned bulges of the electrode emerging from the calender do not occur.
  • the uncoated regions are to be deformed such that either the deformation of the collector region coated with electrode material leads to a stress compensation or build up in the uncoated regions no tensions due to the longitudinal expansion of the coated collector regions during calendering, as the uncoated regions go along the longitudinal strain can.
  • the processing step can take place both before the loading step and parallel to it. It would be conceivable even to follow the processing step to the calendering step.
  • the collector belt is preferably subjected to the processing step before it enters the calendering device.
  • both edge regions of the collector belt are stretched longitudinally in the processing step or transferred to the state more yielding in the longitudinal direction than an elongation the stresses caused by the extension of the central area of the collector belt also have an effect on both sides.
  • the uncoated regions lying between the strips are preferably also lengthwise stretched or transferred into the state that is more flexible in the longitudinal direction than an elongation.
  • the at least one uncoated region is particularly preferably stretched out of the group comprising rolls and embossing in the longitudinal direction or offset in the longitudinally stretched state.
  • This can be done, for example, by a rolling process (rolling out of the at least one uncoated area) in which the uncoated areas or areas are subjected to pressure, such as the areas covered with the electrode strips during calendering.
  • the edge region is processed by an embossing tool such as a gear to a deformation perpendicular to the direction of the Bandes bring about.
  • Edge regions resulting from such a process have in preferred embodiments a wave, triangular, rectangular or sawtooth-like profile (in longitudinal section). Such reshaped areas can easily relax in the longitudinal direction when the electrode material coated central area is stretched or stretched in that direction.
  • the at least one uncoated region may also be preferred to structurally weaken the at least one uncoated region by perforation or by introducing weakening or weakening lines, so that it becomes more yielding in the longitudinal direction compared to elongation.
  • a structural weakening for example by means of punching or drilling tools (introducing a perforation) or embossing tools (introduction of folds or creases) are brought about.
  • perforations or points of weakness or lines of weakness can also be introduced "non-mechanically" into the collector belt, namely by means of a material-removing process, for example by means of a laser C02 laser can be cut easily.
  • Collector belts which have at least one first and, in parallel thereto, at least one second strip-shaped region can be obtained by the described processing variants, wherein the belts have a larger one in the at least one first region Have stretchability in the longitudinal direction than in the at least one second region or the at least one first region opposite the at least one second region is stretched in the longitudinal direction.
  • the at least one first region is a region processed in the processing step in the context of a method according to the invention and the at least one second region is an area which is provided for coating with one or more electrode strips.
  • collector strips preferably have as the first region one or more strip-shaped regions which have weakening points or lines of weakness or are perforated.
  • collector tapes have, as the first region, one or more strip-shaped regions which have a wave-shaped, triangular, rectangular or sawtooth-like longitudinal profile.
  • Such collector strips are also the subject of the present invention.
  • Electrodes made in accordance with the method of the present invention typically stand out clearly from conventional electrodes over the described characteristically processed portions of their collector tapes.
  • electrodes which comprise one of the band-shaped current collectors described are also the subject of the present invention.
  • they comprise one of the band-shaped current collectors described and at least one strip of an electrode material which is applied to the current collector and at least partially covers the at least one second region.
  • the electrodes according to the invention are in a wound form, in particular spirally wound, So as electrode winding. They are particularly preferably part of a wound electrode-separator composite of areal electrodes and separators with the sequence positive electrode / separator / negative electrode.
  • the electrodes and separators can be connected to one another in a lamination step and then wound up, but in modern winding machines these steps can also be carried out simultaneously. Further features of the invention will become apparent from the following description of the drawings, in which the invention is illustrated with reference to schematic sketches. It should be emphasized at this point that all facultative aspects of the method according to the invention described in the present application can be implemented individually or in combination with one or more further features in one embodiment of the invention. The preferred embodiment described below is merely illustrative and for a better understanding of the invention and is in no way limiting.
  • FIG. 1 illustrates the problem underlying the present invention based on a schematic illustration of two calender rolls and a collector strip coated with electrode material passing through the gap between the calender rolls.
  • the calender rolls 101 and 102 shown in longitudinal section form the gap 103, which is traversed by the collector strip 105 coated on both sides with electrode material 104a and 104b.
  • the terminal edge portions 106a and 106b of the collector belt are uncoated and do not contact the calender rollers 101 and 102 because of their small thickness. Accordingly, the calender rolls 101 and 102 exert pressure only on the region of the collector belt 105 coated with electrode material and can cause them to be deformed. men.
  • the collector belt 105 Since the collector belt 105 is drawn through the gap 103 between the rollers 101 and 102 and thus a tensile force acts on the collector belt 105, a deformation results, in particular in the longitudinal direction and leads to a corresponding longitudinal expansion of the coated region of the collector belt 105.
  • Fig. 2 is a plan view of a collector belt processed according to the present invention (schematic representation).
  • This has a second strip-shaped region 201, which is coated with electrode material, and the uncoated first strip-shaped regions (edge regions) 202 and 203.
  • the uncoated edge region 202 has a plurality of perforation lines 204, which are either perpendicular or at an angle between 30 and 60 ° are aligned with the longitudinal direction of the collector belt. If a collector belt treated in this way passes through a calendering device, in which longitudinal stretching of the coated region 201 occurs, the stresses occurring between the coated region and the uncoated region 202 are counteracted by the fact that the latter is caused by the perforation lines 204 in the longitudinal direction (arrow direction). can relax.
  • FIG. 3 is a plan view of a processed according to the present invention collector band (schematic representation), are applied to the three parallel strips 301 a, 301 b and 301 c made of electrode material.
  • the collector band has the uncoated edge regions 302a and 302b and, between the strips 301a, 301b and 301c, the uncoated intermediate regions 303a and 303b.
  • the uncoated regions 302a and 302b as well as 303a and 303b have a plurality of perforation lines 304a-d, which are aligned perpendicular to the longitudinal direction of the collector belt.
  • the uncoated regions With a tensile load in the longitudinal direction, the uncoated regions generally expand more easily than the regions of the collector band which are covered with the electrode strips 301 a, 301 b and 301 c.
  • a separation of the three electrode strips may be made by cuts along lines 305 and 306.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne un procédé de fabrication d'électrodes pour batteries lithium-ion, comprenant une étape de revêtement dans laquelle un collecteur de courant en forme de bande traverse un dispositif de revêtement dans lequel un ou plusieurs rubans d'un matériau d'électrode est appliqué sur au moins un côté de la bande de collecteur (dans le sens de défilement), le matériau d'électrode étant appliqué sur la bande de collecteur de telle manière qu'à côté et/ou entre le ou les rubans, une région de la bande de collecteur reste non revêtue, une étape de calandrage dans laquelle le matériau d'électrode appliqué sur la bande de collecteur est comprimé dans un dispositif de calandrage, et une étape de traitement dans laquelle au moins une des régions non revêtues est mise directement dans un état étendu en longueur ou dans un état dans lequel la région du bord est plus élastique par rapport à un allongement dans la direction longitudinale. L'invention concerne également des collecteurs de courant en forme de bande apparaissant dans ce procédé ainsi qu'une électrode pouvant être fabriquée selon le procédé.
PCT/EP2012/073909 2011-11-30 2012-11-29 Électrodes pour batteries lithium-ion et leur fabrication WO2013079570A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102011087455.0 2011-11-30
DE102011087455 2011-11-30
DE102011088824.1 2011-12-16
DE102011088824A DE102011088824A1 (de) 2011-11-30 2011-12-16 Elektroden für Lithium-Ionen-Batterien und ihre Herstellung

Publications (1)

Publication Number Publication Date
WO2013079570A1 true WO2013079570A1 (fr) 2013-06-06

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PCT/EP2012/073909 WO2013079570A1 (fr) 2011-11-30 2012-11-29 Électrodes pour batteries lithium-ion et leur fabrication

Country Status (2)

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DE (1) DE102011088824A1 (fr)
WO (1) WO2013079570A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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CN114981998A (zh) * 2020-02-27 2022-08-30 宝马股份公司 用于制造电极的方法
CN115004399A (zh) * 2020-02-27 2022-09-02 宝马股份公司 用于制造电极的方法
DE102022208172A1 (de) 2022-08-05 2024-02-08 Volkswagen Aktiengesellschaft Verfahren zur Fertigung einer Elektrode

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DE102013207353A1 (de) * 2013-04-23 2014-10-23 Thyssenkrupp System Engineering Gmbh Verfahren zur Herstellung einer Elektrode und Elektrode für eine Energiespeicherzelle
DE102016203240A1 (de) 2016-02-29 2017-08-31 Robert Bosch Gmbh Verfahren zur Herstellung einer Elektrode, Elektrode und Batteriezelle
EP3503259A1 (fr) * 2017-12-20 2019-06-26 Manz AG Procédé d'usinage d'un matériau d'électrode
DE102019100476A1 (de) * 2019-01-10 2020-07-16 Bayerische Motoren Werke Aktiengesellschaft Kollektorfolie sowie Verfahren zum Herstellen einer Kollektorfolie
EP3879597A1 (fr) * 2020-03-11 2021-09-15 Volkswagen Ag Procédé d'usinage d'une bande d'électrode et dispositif d'usinage associé
EP4016664A1 (fr) 2020-12-17 2022-06-22 VARTA Microbattery GmbH Dispositif et procédé de compression d'une matière d'électrode appliqué à une bande collectrice
DE102021105657A1 (de) 2021-03-09 2022-09-15 Battrion Ag Verfahren zur herstellung eines beschichteten, verspannungsfreien trägers
DE102021206617B3 (de) 2021-06-25 2022-09-08 Volkswagen Aktiengesellschaft Vorrichtung zur Herstellung einer Elektrodenanordnung für eine Lithium-Ionen-Batteriezelle

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Publication number Priority date Publication date Assignee Title
JPH11176447A (ja) * 1997-12-10 1999-07-02 Denso Corp 電池およびその製造方法
JPH11354103A (ja) * 1998-06-10 1999-12-24 Dainippon Printing Co Ltd 非水電解液二次電池用電極板、その製造方法、及びその中間製品
JP2000251942A (ja) * 1999-03-01 2000-09-14 Matsushita Battery Industrial Co Ltd 非水電解液二次電池の製造方法
JP2001357840A (ja) * 2000-04-14 2001-12-26 Toshiba Battery Co Ltd 電池用電極シートの加工方法および加工装置
JP2002237292A (ja) * 2001-02-09 2002-08-23 Japan Storage Battery Co Ltd 非水電解質二次電池
US20100081052A1 (en) 2008-09-29 2010-04-01 Hideaki Morishima Non-aqueous electrolyte secondary battery, electrode used for secondary battery, and method of manufacturing electrode
DE102010032770A1 (de) 2010-07-29 2012-02-02 Li-Tec Battery Gmbh Verfahren und Vorrichtung zur Herstellung eines mehrschichtigen Elektrodenaufbaus, galvanische Zelle
EP2421075A2 (fr) * 2010-08-18 2012-02-22 GS Yuasa International Ltd. Feuille d'électrode de batterie et son procédé de fabrication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114981998A (zh) * 2020-02-27 2022-08-30 宝马股份公司 用于制造电极的方法
CN115004399A (zh) * 2020-02-27 2022-09-02 宝马股份公司 用于制造电极的方法
DE102022208172A1 (de) 2022-08-05 2024-02-08 Volkswagen Aktiengesellschaft Verfahren zur Fertigung einer Elektrode

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