WO2022017995A1 - Procédé de fabrication d'un composant soudé par pression - Google Patents

Procédé de fabrication d'un composant soudé par pression Download PDF

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Publication number
WO2022017995A1
WO2022017995A1 PCT/EP2021/070066 EP2021070066W WO2022017995A1 WO 2022017995 A1 WO2022017995 A1 WO 2022017995A1 EP 2021070066 W EP2021070066 W EP 2021070066W WO 2022017995 A1 WO2022017995 A1 WO 2022017995A1
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WO
WIPO (PCT)
Prior art keywords
semi
protective layer
contacted
welded
welding tool
Prior art date
Application number
PCT/EP2021/070066
Other languages
German (de)
English (en)
Inventor
Christian Buske
Original Assignee
Plasmatreat Gmbh
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 Plasmatreat Gmbh filed Critical Plasmatreat Gmbh
Publication of WO2022017995A1 publication Critical patent/WO2022017995A1/fr

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Classifications

    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/24—Preliminary treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof
    • 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 method for producing a pressure-welded component, in particular a component for producing a lithium-ion battery, in which at least two semi-finished products are welded to one another by means of a pressure-welding process, with at least one of the semi-finished products being mechanically contacted with a welding tool for the pressure-welding process.
  • components for producing a lithium-ion battery for example a component with a contact plate and at least one electrode foil
  • the present invention is based on the object of providing a method for producing a pressure-welded component which at least partially eliminates the aforementioned disadvantages, in particular contamination of the pressure-welded component produced, for example the surface of the electrode foil welded to a contact plate , prevented as much as possible.
  • a method for producing a pressure-welded component in particular a component for producing a lithium-ion battery, in which at least two semi-finished products are welded to one another by means of a pressure-welding process, with at least one of the semi-finished products being mechanically contacted with a welding tool for the pressure-welding process
  • the at least one semi-finished product contacted by the welding tool is provided with a protective layer in the area to be contacted by means of a plasma coating process, in particular using an atmospheric plasma jet.
  • At least two semi-finished products are welded together using a pressure welding process.
  • the pressure welding process can be, for example, resistance welding, cold pressure welding, friction welding or ultrasonic welding.
  • the at least two semi-finished products to be welded together contact each other and typically contacted at least one of the semi-finished products with a welding tool that introduces a current, pressure or vibration into the at least one semi-finished product.
  • a welding tool that introduces a current, pressure or vibration into the at least one semi-finished product.
  • at least one of the semi-finished products is contacted with a so-called sonotrode, via which ultrasonic vibrations are coupled into the semi-finished products.
  • the at least one semi-finished product contacted by the welding tool is provided with a protective layer in the area to be contacted before contact is made.
  • the protective layer can be an organic, in particular silicon-organic layer, for example.
  • the area to be contacted by the welding tool is preferably completely covered by the protective layer.
  • the protective layer is preferably an oxidation-inhibiting layer.
  • the semi-finished product is provided with the protective layer using a plasma coating process.
  • the plasma coating process is preferably an atmospheric plasma coating process.
  • the semi-finished product is preferably provided with the protective layer using an atmospheric plasma jet.
  • a plasma jet is understood to mean a directed gas jet which is at least partially ionized.
  • An atmospheric plasma jet is understood to mean a plasma jet which is operated essentially under atmospheric pressure, ie in which the plasma jet is directed into an environment which has essentially atmospheric pressure.
  • the plasma jet can be generated by means of a plasma nozzle, the plasma nozzle having a nozzle opening from which the plasma jet into a Environment with essentially atmospheric pressure exits.
  • a plasma nozzle By using such a plasma nozzle, the direction of the plasma jet can be adjusted by aligning the plasma nozzle, so that the protective layer can be applied in a targeted manner in the areas to be mechanically contacted with a welding tool for the pressure welding process.
  • such a plasma nozzle can be easily integrated into a process chain for inline operation.
  • the protective layer can also be applied by using a precursor.
  • a precursor is a starting material that can be excited or fragmented in the plasma, for example, and forms the protective layer on the surface of the semi-finished product.
  • the precursor can be introduced at various points in the atmospheric plasma jet, for example with the working gas for operating a plasma nozzle used, in the area in which the plasma is generated or in an area downstream of the plasma generation.
  • the plasma jet is directed in particular at the areas of the semi-finished product to be coated, where the protective layer is then formed.
  • the precursor can be applied to the areas of the semi-finished product to be coated independently of the plasma jet, and the areas provided with the precursor can be exposed to a plasma jet. In this case, the precursor reacts with the plasma in the reaction zone of the plasma beam on the surface of the areas to be coated.
  • the precursor can be introduced into the plasma jet in gaseous, liquid or solid form or applied to the surface to be coated. Furthermore, the precursor can be used in a mixture, for example dissolved or dispersed in a fluid.
  • a low-pressure plasma coating process for example plasma-enhanced chemical vapor deposition, can also be considered.
  • the semi-finished product to be provided with the protective layer is preferably arranged in a low-pressure chamber, which is preferably evacuated to a pressure of 1 mbar or less and in which a low-pressure plasma, preferably excited by high frequency (e.g. 13.56 MHz), is generated .
  • the precursor is introduced into the low-pressure chamber, so that the protective layer is deposited on the surface of the component to be coated by means of the low-pressure plasma in the low-pressure chamber. Areas of the surface of the semi-finished product that are not to be coated or other surfaces of the semi-finished product are preferably masked.
  • an electrical contact element and at least one electrode foil are welded to one another, the electrode foil being mechanically contacted with the welding tool and provided with the protective layer in the area to be contacted before contact with the welding tool.
  • the electrode foil is typically coated with an electrode material, for example with a graphite or silicon-containing electrode material for the negative electrode or with a lithium oxide or Lithium phosphate-containing electrode material for the positive electrode. Particles present on the electrode foil can damage or even perforate the layer of electrode material, which can result in reduced or malfunctioning, for example a short circuit, of the accumulator. Since contamination of the electrode foils by the pressure welding process can be prevented with the present method, this method can be used particularly advantageously for the pressure welding of electrode foils and contact elements for the production of accumulators.
  • an electrical contact element and a stack of electrode foils arranged one on top of the other are welded to one another, with one electrode foil of the stack being mechanically contacted with the welding tool and the electrode foil contacted with the welding tool being provided with the protective layer before contact is made in the area to be contacted .
  • Electrode foils are welded to the contact element without contamination of the electrode foils occurring.
  • a component with a plurality of electrode foils welded to a contact element can be used in particular in the production of accumulators, in particular lithium-ion accumulators.
  • the at least one electrode foil is a metal foil, in particular an aluminum or copper foil, which can in particular be coated with an electrode material.
  • An aluminum foil is used in particular to provide an electrode foil for the positive electrode of a rechargeable battery, ie for the cathode in the discharge process.
  • a copper foil is used in particular for providing an electrode foil for the negative electrode of a secondary battery, that is, for the anode in the discharging process. Because in particular
  • Metal foils such as copper or aluminum foils to particle formation during the Tend pressure welding process, the application of a protective layer is advantageous, especially with such films.
  • the pressure welding process is a friction welding process, in particular an ultrasonic welding process.
  • the semi-finished products to be welded can be welded in particular without adding an additional material.
  • the friction welding process is characterized by high accuracy and good quality of the welded connection, so that a high-quality pressure-welded component for the production of an accumulator can be produced by the method according to the invention.
  • the frictional heat is generated by means of high-frequency mechanical sound waves, for example with a frequency in the range of 20 kHz, which are coupled into the semi-finished products to be welded via the welding tool, in particular the sonotrode.
  • the sound waves cause a high-frequency vibration, i.e. movement, of the semi-finished products against each other, typically with a very small amplitude, so that the two semi-finished products are welded together.
  • all areas to be contacted are preferably provided with a protective layer.
  • the protective layer is a protective layer in sections, which extends over a partial area of the surface of the at least one semi-finished product, in particular over the area to be contacted by the welding tool.
  • the protective layer can be applied in a targeted manner in the areas of the semi-finished product to be coated that are to be contacted by the welding tool, while other areas of the surface of the semi-finished product to be coated, in particular areas in which the protective layer would interfere with further use of the component to be manufactured, remain free .
  • one of the semi-finished products is an electrode foil, for example, then in particular the area of the electrode foil to be coated with electrode material in the further production process remains free of the protective layer.
  • areas of the surface of the semi-finished product that are to be electrically contacted in the further production process preferably remain free of the protective layer.
  • a plasma nozzle which generates a directed plasma jet, is preferably used to apply the protective layer in sections.
  • the plasma jet is preferably guided over the partial area of the surface of the semi-finished product to be coated, for example by moving the plasma nozzle. Additionally or alternatively, the partial area to be coated can also be defined by appropriate masking of the semi-finished product, with masked areas remaining uncoated.
  • the protective layer can be applied accordingly to several partial areas of the surface of the semi-finished product, which are in particular separate from one another.
  • the method uses a plasma nozzle with a nozzle arrangement which divides the plasma jet generated with the plasma nozzle into a plurality of partial jets emerging from a plurality of openings in the nozzle arrangement.
  • the plurality of nozzle openings can be arranged along a channel of the nozzle arrangement.
  • a suitable nozzle arrangement is known, for example, from DE 10 2016 125 699 A1.
  • a plasma nozzle with such a nozzle arrangement allows a larger area of the semi-finished product to be provided with a protective layer at the same time, so that the protective layer can be applied efficiently.
  • the application of a protective layer in certain areas can be configured efficiently by means of a nozzle arrangement that is specially adapted to the one or more partial areas of the surface of the semi-finished product that are to be coated.
  • the protective layer is an organic, in particular a silicon-organic, protective layer.
  • organic, in particular a silicon-organic, protective layer In tests, such protective layers have proven to be well suited to holding particles loosened from the material of the semi-finished product by a welding tool on the surface of the semi-finished product so that they do not fly around.
  • an organic, in particular a silicon-organic, precursor is introduced into the atmospheric plasma jet.
  • the organic, in particular silicon-organic, protective layers described above can be produced in this way.
  • the atmospheric plasma jet is generated by means of an arc-like discharge in a working gas, the arc-like discharge being produced by applying a high-frequency high voltage between electrodes.
  • Nitrogen or air is preferably used as the working gas.
  • a high-frequency high voltage is typically a voltage of 1-100 kV, in particular 1-50 kV, preferably 10-50 kV, at a frequency of 1-300 kHz, in particular 1-100 kHz, preferably 10-100 kHz, more preferably 10 - 50kHz understood.
  • a plasma jet can be generated that can be focused well and is also well suited for plasma coating, in particular for applying a protective layer in sections in the areas that are contacted for the welding process.
  • FIG. 1 shows an example of a plasma nozzle that can be used for the method for producing a pressure-welded component
  • FIG. 2a-d several steps of an embodiment of the method for
  • FIG 3 shows a further exemplary embodiment of the method for producing a pressure-welded component in a schematic representation.
  • FIG. 1 first shows a schematic sectional view of a plasma nozzle 2 which can be used in a method for producing a pressure-welded component.
  • the plasma nozzle 2 has a metal nozzle tube 4 which tapers conically to form a nozzle opening 6 .
  • the nozzle tube 4 has a swirl device 8 with an inlet 10 for a working gas, for example nitrogen.
  • An intermediate wall 12 of the swirl device 8 has a ring of bores 14 which are inclined in the circumferential direction and through which the working gas is wired.
  • the downstream, conically tapered part of the nozzle tube is therefore flowed through by the working gas in the form of a vortex 16, the core of which runs on the longitudinal axis of the nozzle tube.
  • an electrode 18 is arranged centrally, which tapers coaxially in the direction of the Section protrudes into the nozzle tube.
  • the electrode 18 is electrically connected to the intermediate wall 12 and the remaining parts of the twisting device 8 .
  • the swirl device 8 is electrically insulated from the nozzle tube 4 by a ceramic tube 20 .
  • a high-frequency high voltage which is generated by a transformer 22 , is applied to the electrode 18 via the twisting device 8 .
  • the inlet 10 is connected via a hose, not shown, to a variable flow source of pressurized working gas.
  • the nozzle tube 4 is grounded.
  • a high-frequency discharge in the form of an arc 24 is generated between the electrode 18 and the nozzle tube 4 by the applied voltage.
  • arc arc discharge
  • arc-like discharge arc-like discharge
  • DC voltage discharges with essentially constant voltage values. In the present case, however, it is a high-frequency discharge in the form of an arc, ie a high-frequency, arc-like discharge.
  • this arc is channeled in the vortex core on the axis of the nozzle tube 4 so that it only branches in the area of the nozzle opening 6 to the wall of the nozzle tube 4 .
  • the working gas which rotates at a high flow rate in the area of the vortex core and thus in the immediate vicinity of the arc 24, comes into intimate contact with the arc and is thereby partially converted into the plasma state, so that an atmospheric plasma jet 26 emerges through the nozzle opening 6 from the Plasma nozzle 2 exits.
  • the plasma jet 26 and a suitable precursor 28 are applied to the surface.
  • the precursor 28 can be introduced directly into the plasma jet 26 .
  • a precursor feed line 29 be arranged, which introduces the precursor 28 into the plasma jet 26 .
  • Such a precursor feed line can also be integrated directly into the plasma nozzle 2 .
  • a tube with a precursor feed line can be connected to the nozzle opening 6, so that the plasma jet 26 is guided through the tube and the precursor in the tube is introduced into the plasma jet.
  • a precursor feed line is also conceivable, which introduces the precursor into the interior of the nozzle tube 4 .
  • the precursor can also be introduced into the nozzle tube 4 through the inlet 10 together with the working gas. However, it is preferred to introduce the precursor 28 into the plasma jet outside of the nozzle tube 4 in order not to impair the precursor 28 by the arc 24 or the high temperatures inside the nozzle tube 4 .
  • the interaction of the plasma jet 26 with the precursor 28 leads to an activation and possibly fragmentation of the precursor 28.
  • the activated precursor 28 then forms a uniform layer when it hits the surface to be coated.
  • FIG. 2a shows a first step of the method, in which a first semi-finished product 30, for example an electrode film for a rechargeable battery, is provided with a protective layer 32.
  • a first semi-finished product 30, for example an electrode film for a rechargeable battery is provided with a protective layer 32.
  • FIG. For this purpose, an atmospheric plasma jet 38 is generated with a plasma nozzle 40, which can be designed, for example, like the plasma nozzle 2 shown in FIG.
  • the precursor 34 introduced into the plasma jet 38 is partially fragmented and excited by the plasma jet 38 and thus leads to a layer formation on the surface 36 of the first semi-finished product 30.
  • the precursor 34 can be introduced into the plasma jet 38 as shown in FIG this the plasma nozzle left 40.
  • the precursor 34 can also be introduced into the plasma nozzle 40, in particular into the nozzle head 44 of the plasma nozzle 40, or together with a working gas 42 supplying the plasma nozzle 40.
  • the precursor 34 can be applied to the surface 36 of the semi-finished product 30 independently of the plasma jet 38 before it is acted upon by the plasma jet 38 .
  • the precursor 34 can be, for example, an organic compound, in particular an organosilicon compound.
  • an oxidation-inhibiting protective layer can be produced with such a precursor.
  • the protective layer 32 can be applied in a targeted manner so that it extends over a specific partial area 35 of the surface 36 of the first semi-finished product 30, while the remaining part of the surface 36 remains free. In this way, the protective layer 32 can be applied in a targeted manner in the partial area 35 that is to be contacted with a welding tool in the further process.
  • Fig. 2b shows a second step of the method, in which the first semi-finished product 30 and a second semi-finished product 50 to be welded to the first semi-finished product 30, for example an electrical contact element for producing an accumulator, are arranged relative to one another in such a way, in particular overlapping one another that they can be pressure-welded by means of a welding tool 46, the welding tool 46 being placed on the first semi-finished product 30 in the partial area 35 provided with the protective layer 32.
  • the welding tool 46 can be a sonotrode, for example.
  • FIG. 2c shows a third step of the method, in which the first and the second semi-finished product 30, 50 lie one on top of the other in the area to be welded and the welding tool 46 is placed on the first semi-finished product 30 in the partial area 35.
  • FIG. The second semi-finished product 50 can be supported on a counter bearing 47 of the welding tool 46 .
  • the welding tool 46 is set into vibrations 48, for example generated by a generator (not shown), which are transmitted via the mechanical contact of the welding tool 46 to the first semi-finished product 30 in this be coupled.
  • the resulting movement of the semi-finished products 30, 50 against one another for example in the form of a high-frequency vibration 48 during ultrasonic welding, generates frictional heat on the contact surfaces of the two semi-finished products 30, 50 with one another, so that they are welded to one another, with a weld point 54 being formed at the connection point (see Fig. 2d).
  • the welding tool 46 can largely or even completely prevent particles from detaching from the surface 36 of the semi-finished product 30.
  • the formation of particles can already be suppressed, in some cases formed particles are retained by the protective layer 32 so that they do not become detached from the surface of the semi-finished product. In this way, contamination of the semi-finished product surfaces 36 and 52 with particles and thus problems in subsequent processing steps, for example coating an electrode film provided as a semi-finished product with electrode material during production of an accumulator, can be avoided.
  • FIG. 3 shows a further exemplary embodiment of the method for producing a pressure-welded component in a schematic sectional view.
  • a stack 66 of electrode foils 64 arranged one above the other is welded to an electrical contact element 68 by means of a welding tool 60 .
  • the uppermost electrode foil 64 to be contacted by the welding tool 60 during the welding process was previously provided with a protective layer 62 in the area 70 to be contacted, which - similar to that shown in Fig. 2a - is created by subjecting the electrode foil 64 to an atmospheric plasma jet 38 and an in the precursor 34 introduced by the plasma jet 38 was applied to a partial area of the uppermost electrode foil 64 of the stack 66 .
  • the stack 66 of electrode foils 64 arranged one on top of the other and the electrical contact element 68 are welded to one another by means of pressure welding, with the welding tool 60 being placed in the partial area provided with the protective layer 62 on the uppermost electrode foil 64 of the stack 66 is put on.
  • the vibrations coupled in via the welding tool cause the individual electrode foils 64 of the stack 66 and the contact element 68 to move in relation to one another, so that the individual electrode foils 64 are welded to one another and to the contact element 68 .
  • the semi-finished products are welded together one after the other, for example first the electrode foils 64 of the stack 66 together, with the uppermost electrode foil 64 being coated with the protective layer 62 beforehand, and then the resulting foil stack semi-finished product with the contact element.
  • the areas of the uppermost electrode foil 64 of the stack 66 that are in contact with the welding tool 60 with a protective layer 62 particles can be largely or even completely prevented from detaching from the electrode foil 64 by the welding tool 60 . In this way, contamination of the surface of the welded component and, when an accumulator is produced from this component, malfunctions resulting therefrom during operation of an accumulator produced therefrom can be largely or even completely avoided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un composant soudé par pression (56), en particulier d'un composant destiné à la fabrication d'un accumulateur lithium-ion, selon lequel au moins deux demi-produits (30, 50, 64, 68) sont soudés l'un à l'autre par un procédé de soudage par pression, au moins un des demi-produits (30, 64) pour le procédé de soudage par pression étant mis en contact mécanique avec un outil de soudage (46, 60) et le ou les demi-produits (30, 64) mis en contact avec l'outil de soudage (46, 60) étant pourvus, avant la mise en contact, d'une couche de protection (32, 62) dans la zone à mettre en contact au moyen d'un jet de plasma atmosphérique (26, 38).
PCT/EP2021/070066 2020-07-21 2021-07-19 Procédé de fabrication d'un composant soudé par pression WO2022017995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020119220.7 2020-07-21
DE102020119220.7A DE102020119220A1 (de) 2020-07-21 2020-07-21 Verfahren zur Herstellung einer pressgeschweißten Komponente

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WO2022017995A1 true WO2022017995A1 (fr) 2022-01-27

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Cited By (1)

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CN115091019A (zh) * 2022-08-22 2022-09-23 深圳天邦达科技有限公司 一种锂电池控制模组、该模组的热压焊接装置及方法

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