EP2798688A1 - Procédé et système de fabrication d'éléments d'accumulateurs d'énergie électrochimiques - Google Patents

Procédé et système de fabrication d'éléments d'accumulateurs d'énergie électrochimiques

Info

Publication number
EP2798688A1
EP2798688A1 EP12812176.1A EP12812176A EP2798688A1 EP 2798688 A1 EP2798688 A1 EP 2798688A1 EP 12812176 A EP12812176 A EP 12812176A EP 2798688 A1 EP2798688 A1 EP 2798688A1
Authority
EP
European Patent Office
Prior art keywords
object side
plasma
electrostatic charge
reducing
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12812176.1A
Other languages
German (de)
English (en)
Inventor
Steffen Legner
Tim Schaefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Li Tec Battery GmbH
Original Assignee
Li Tec Battery 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 Li Tec Battery GmbH filed Critical Li Tec Battery GmbH
Publication of EP2798688A1 publication Critical patent/EP2798688A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403—Manufacturing processes of separators, membranes or diaphragms
    • H01M50/406—Moulding; Embossing; Cutting
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a method and a system for producing electrochemical cells for electrochemical energy stores, in particular to a method and a system for producing electrodes and / or separators for constructing an electrochemical energy store or parts of such electrodes and / or separators.
  • electrochemical energy storage batteries primary storage
  • accumulators secondary storage
  • Primary storage is typically charged only once and disposed of after discharge, while secondary storage allows multiple (from a few 100 to over 10,000) cycles of charge and discharge.
  • rechargeable batteries are also referred to as batteries.
  • the electrodes are needed in a very large number, which is why there is a need for high-quality, effective and cost-effective manufacturing processes.
  • this object is achieved by a method for producing sheet-like or plate-shaped objects according to claim 1 or a system for producing sheet-like or plate-shaped objects according to claim 12.
  • Advantageous embodiments and further developments are the subject of the dependent claims.
  • this object is achieved in a method for the production of sheet-like or plate-shaped objects, in particular for the production of electrodes and / or separators for the construction of an electrochemical, preferably for use in a motor vehicle designed energy storage or parts of such electrodes and / or such Separators, wherein the sheet-like or plate-shaped objects have a first object side surface and a second object side surface opposite to the first object side surface, achieved by the manufacturing method comprising the steps of: reducing the electrostatic charge on the first object side surface of the sheet-like objects by Plasma, in particular an atmospheric plasma is brought to act on the first object side surface of the sheet or plate-shaped objects, and reducing the electrostatic charge on the second object Side surface of the sheet or plate-shaped objects by a plasma, in particular an atmospheric plasma is brought
  • An advantage of this embodiment is that an electrostatic charge of the electrodes and separators can be reduced or eliminated, which occur in particular during processing steps of web goods in drying rooms and which can lead to voltage breakdowns on the separator in the production of the electrochemical cells. With this The quality of the electrochemical cells can be improved. Another advantage of the method according to the invention is that it can be easily integrated into existing production facilities.
  • an "electrochemical energy store” is to be understood as meaning any type of energy store from which electrical energy can be withdrawn, wherein an electrochemical reaction takes place in the interior of the energy store
  • the term comprises energy stores of all kinds, in particular primary batteries and secondary batteries
  • the electrochemical energy storage device has at least one
  • the plurality of electrochemical cells may be connected in parallel to store a larger amount of charge, or may be connected in series to provide a desired operating voltage, or may be a combination of parallel and series connection.
  • an “electrochemical cell” is meant a device which serves to deliver electrical energy storing the energy in a chemical form
  • the cell is also designed to receive electrical energy, convert it to chemical energy, and
  • the shape (ie in particular the size and the geometry) of an electrochemical cell can be selected depending on the available space.
  • the electrochemical cell is substantially prismatic or cylindrical.
  • the present invention can be advantageously used in particular for electrochemical cells. referred to as pouch cells or coffeebag cells without the electrochemical cell of the present invention being restricted to this application.
  • Such an electrochemical cell usually has an electrode arrangement which is at least partially enclosed by an enclosure.
  • an electrode arrangement is to be understood as meaning an arrangement of at least two electrodes and an electrolyte arranged therebetween.
  • the electrolyte can be partially from a Separator be included, the separator then separates the electrodes.
  • the electrode arrangement has a plurality of layers of electrodes and separators, wherein the electrodes of the same polarity are in each case preferably electrically connected to one another, in particular connected in parallel.
  • the electrodes are for example plate-shaped or foil-like and are preferably arranged substantially parallel to one another (prismatic energy storage cells).
  • the electrode assembly may also be wound and have a substantially cylindrical shape (cylindrical energy storage cells). The term electrode assembly should also include such electrode coils.
  • the electrode arrangement may also comprise lithium or another alkali metal in ionic form.
  • a "sheet-like or plate-shaped object” is to be understood as meaning a substantially flat article, preferably a thin flat article
  • the first and second object side surfaces each form the surface of such a planar article, the first and second object side surfaces preferably being substantially parallel to one another,
  • the one side surface which connects the first and the second object side surfaces together determines the thickness dimension of the flat article, the side surface preferably extending substantially perpendicularly ht to the first and the second object side surface, without the invention being limited to this embodiment.
  • the first and second object side surfaces may in principle assume any desired shapes, preferably the first and second object side surfaces are each selected to be substantially rectangular; In this case, the object has a total of four side surfaces, wherein adjacent side surfaces are arranged substantially perpendicular to each other.
  • the thickness of the objects is basically arbitrary, it preferably ranges from film thickness to plate thickness.
  • the first object side surface of the object may also be referred to as an object top and the second object side surface of the object may also be referred to as an object bottom, or vice versa.
  • the step of reducing the electrostatic charge on the first object side surface of the sheet or plate-shaped objects is performed such that the electrostatic charge on the first object side surface is removed.
  • the step of reducing the electrostatic charge on the second object side surface of the sheet or plate-shaped objects is performed so as to eliminate the electrostatic charge on the second object side surface. In this way, the above-mentioned advantages can be further improved.
  • the plasma is applied to the first object side surface via at least a first plasma nozzle. Furthermore, in the step of reducing the electrostatic charge on the second object side surface, the plasma is preferably applied to the second object side surface via at least a second plasma nozzle.
  • An advantage of this embodiment is that the plasma can be applied particularly well to the object side surfaces.
  • the at least one first plasma nozzle is operated with air and under high voltage.
  • the at least one second plasma nozzle is operated with air and under high voltage.
  • An advantage of this embodiment is that it can be integrated particularly easily into production systems.
  • the at least one first plasma nozzle is operated with a process gas and under high voltage.
  • the at least one second plasma nozzle is operated with a process gas and under high voltage.
  • An advantage of this embodiment is that it allows a further treatment of the surfaces and in particular an activation of the surfaces.
  • the plasma flows out of the at least one first plasma nozzle at such a high outflow velocity that particles located on the first object side surface are removed.
  • the plasma flows out of the at least one second plasma nozzle at such a high discharge velocity that particles located on the second object side surface are removed.
  • the plasma when flowing out of the at least one first plasma nozzle, has such excited particles as to cause activation of the first object side surface.
  • the plasma when flowing out of the second plasma nozzle, has such excited particles that activation of the second object side surface is effected.
  • An additional advantage is that higher currents are possible.
  • a further advantage of this embodiment is that a planar lithium deposition can be reduced and that the thickness growth of the electrochemical cell decreases toward the end of its service life.
  • An additional advantage of this embodiment is that an improved connection of the active surfaces during the cyclization can be achieved.
  • Another advantage of this embodiment is that an increased life or an increased number of cycles can be achieved.
  • An additional advantage is that the laminatability of the separators can be increased, especially in the case of separators having three layers.
  • the at least one first plasma nozzle is guided on a robot.
  • the at least one second plasma nozzle is guided on a robot.
  • the step of reducing the electrostatic charge on the first object side surface and the step of reducing the electrostatic charge on the second object side surface are performed simultaneously on the electrodes and the separators after the electrodes and the separators are wound and / or or stacked electrode assembly have been arranged.
  • at least one component of the electrode may be selected from the group consisting of LiCoO 2 , LiNiO 2 , LiFePO 4 , Li 4 Ti 5 O 12 , Li [Ni x Coi -x - y Mny] 0 2, LiNi 1-x Co x 0 2, Li [Ni x Co 1-x-y Al y] 0 2, Sn0 2 or LaMn 2 0.
  • a separator which is not or only poorly electron-conducting, and which consists of an at least partially permeable carrier.
  • the support is preferably coated on at least one side with an inorganic material.
  • An organic material which is preferably configured as a nonwoven web is preferably used as the carrier, which is at least partially permeable to material.
  • the organic material which preferably contains a polymer and particularly preferably a polyethylene terephthalate (PET), is coated with an inorganic, preferably ion-conducting material, which is more preferably ion-conducting in a temperature range from -40.degree. C. to 200.degree.
  • the inorganic material preferably contains at least one compound from the group of oxides, phosphates, sulfates, titanates, silicates, aluminosilicates with at least one of the elements Zr, Al, Li, particularly preferably zirconium oxide.
  • the inorganic, ion-conducting material preferably has particles with a largest diameter below 100 nm. Such a separator is marketed, for example, under the trade name "Separion" by Evonik AG in Germany.
  • This method is particularly suitable for continuous production processes in continuous production lines.
  • the method is also suitable for producing a very large number of objects. It therefore offers particular advantages for the production of electrodes or separators for the construction of electrochemical energy storage devices.
  • this object is achieved in a system for producing sheet-like or plate-shaped objects, in particular for producing electrodes and / or separators for constructing an electrochemical, preferably for use in a motor vehicle.
  • staltet energy storage or parts of such electrodes and / or such separators, wherein the sheet or plate-shaped objects have a first object side surface and the first object side surface opposite second object side surface achieved in that the Her- positioning system has a plasma device, which arranged and configured such is that with application of the plasma on the first object side surface of the sheet or plate-shaped objects reduces their electrostatic charge, preferably removed and that with application of the plasma on the second object side surface of the sheet or plate-shaped objects reduces their electrostatic charge, preferably removed.
  • the plasma apparatus preferably has at least one first plasma nozzle, preferably guided on a robot, for the first object side surface and in particular at least one second plasma nozzle for the second object side surface, preferably guided on a robot.
  • the present invention also relates to an electric cell for an electrochemical energy storage device with electrodes, which has been produced according to a production method mentioned above and / or produced by means of a production system mentioned above.
  • Fig. 1 is a flowchart for a manufacturing method of a first embodiment according to the present invention
  • Fig. 2 is a flowchart for a manufacturing method of a second embodiment of the present invention.
  • Fig. 1 shows an embodiment of a manufacturing method according to a first embodiment of the present invention, wherein in a step S1 in a continuous process of a band sheet or plate-shaped objects are made.
  • this step S1 may include a step S1.1 in which separator elements are cut out of a separator belt and a step S1 .2 in which cathode elements are punched out of a cathode belt and a step S1.3 in which anode elements are punched out of an anode tape.
  • this step S2 may comprise a substep S2.1 in which the separator elements are cleaned, a substep S2.2 in which the cathode elements are cleaned, and a substep S2.3 in which the anode elements are cleaned.
  • a step S3 the surfaces of the sheet or plate-shaped objects are activated.
  • this step S3 may include a substep S3.1, in which the surfaces of the separator elements are activated, and a substep S3.2, in which the surfaces of the cathode elements are activated, and a substep S3.3 in which the surfaces of the anode elements are activated.
  • Step S3 the step S3 or its sub-steps before the step S2 or its sub-steps take place.
  • Step S5 the electrostatic charge on the object side surfaces of the sheet or plate-shaped objects is reduced by the action of a plasma.
  • Step S5 may comprise a substep S5 'in which the electrostatic charge on the first object side surface of the sheet or plate-shaped objects is reduced by the action of the plasma, and a substep S5 "in which the electrostatic charge is applied. Charge on the second object side surface of the sheet or plate-shaped objects is reduced by the action of the plasma. As shown in FIG.
  • step S5 may comprise a substep S5.1, in which the action of a plasma reduces the electrostatic charge on the surfaces of the separator elements, and a substep S5.2, in which a Plasma, the electrostatic charge on the surfaces of the cathode elements is reduced, and a substep S5.3, in which the action of a plasma, the electrostatic charge on the surfaces of the anode elements is reduced.
  • a step S6 the cathode elements, the anode elements and the separator elements are arranged to form an electrode arrangement, which is preferably stacked or wound.
  • the step S5 of reducing the electrostatic charge on the object side surfaces (or its substeps) by selectively selecting the parameters of the plasma perform a cleaning and activation of the surfaces of the cathode elements, the anode elements and the separator elements which speeds up and simplifies litigation.
  • step S4 the cathode elements, the anode elements and the separator elements are arranged to form an electrode arrangement, which is preferably stacked or wound.
  • a step S5 the electrostatic charge on the object side surfaces of the sheet-shaped or plate-shaped objects is reduced by the action of a plasma, with plasma nozzles guided on robots can be.
  • This step S5 may also include the substep S5 ', in which the electrostatic charge on the first object side surface of the sheet or plate-shaped objects is reduced by the action of the plasma, and the substep S5 ", at which the electrostatic charge on the second object side surface of the sheet As shown in Fig.
  • this step S5 may include the sub-step S5.1, in which the electrostatic charge on the surfaces of the separator elements is reduced by the action of a plasma, and the Sub-step S5.2, in which the electrostatic charge on the surfaces of the cathode elements is reduced by the action of a plasma, and the sub-step S5.3, in which the electrostatic charge on the surfaces of the anode elements is reduced by the action of a plasma.
  • the reduction of the electrostatic charge with a plasma prevents damage to the production, wherein a further advantage may be that by appropriate choice of the parameters of the plasma additionally cleaning and activation of the surfaces can be achieved, thereby improving the wetting with electrolyte and prolongation the lifetime can be achieved.
  • the filling times can be reduced with the electrolyte.

Landscapes

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

Abstract

L'invention concerne un procédé de fabrication d'objets en forme de feuilles ou de plaques, en particulier d'électrodes et/ou de séparateurs destinés à réaliser un accumulateur d'énergie électrochimique, de préférence destiné à être utilisé dans un véhicule, ou de parties de ces électrodes et/ou séparateurs. Les objets en forme de feuilles ou de plaques présentent une première surface latérale et une seconde surface latérale opposée à la première. Le procédé de fabrication comprend les étapes suivantes : réduction (S5') de la charge électrostatique sur la première surface latérale des objets en forme de feuilles ou de plaques en faisant agir un plasma, en particulier un plasma atmosphérique, sur la première surface latérale des objets en forme de feuilles ou de plaques; et réduction (S5") de la charge électrostatique sur la deuxième surface latérale des objets en forme de feuilles ou de plaques en faisant agir un plasma, en particulier un plasma atmosphérique, sur la deuxième surface latérale des objets en forme de feuilles ou de plaques.
EP12812176.1A 2011-12-30 2012-12-20 Procédé et système de fabrication d'éléments d'accumulateurs d'énergie électrochimiques Withdrawn EP2798688A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161581659P 2011-12-30 2011-12-30
DE102011122658A DE102011122658A1 (de) 2011-12-30 2011-12-30 Verfahren und System zur Herstellung elektrochemischer Zellen für elektrochemische Energiespeicher
PCT/EP2012/005313 WO2013097939A1 (fr) 2011-12-30 2012-12-20 Procédé et système de fabrication d'éléments d'accumulateurs d'énergie électrochimiques

Publications (1)

Publication Number Publication Date
EP2798688A1 true EP2798688A1 (fr) 2014-11-05

Family

ID=48607919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12812176.1A Withdrawn EP2798688A1 (fr) 2011-12-30 2012-12-20 Procédé et système de fabrication d'éléments d'accumulateurs d'énergie électrochimiques

Country Status (4)

Country Link
US (1) US20130171370A1 (fr)
EP (1) EP2798688A1 (fr)
DE (1) DE102011122658A1 (fr)
WO (1) WO2013097939A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7014164B2 (ja) * 2016-07-26 2022-02-15 日本電気株式会社 電極アセンブリおよびその製造方法
CN108963161B (zh) * 2018-07-10 2021-05-14 福建师范大学 含有二价磷酸盐和磷碳价键的涂覆膜制备方法
CN111668432B (zh) * 2020-06-11 2023-05-19 深圳市鼎泰祥新能源科技有限公司 一种锂离子电池涂层隔膜及其加工工艺
CN113921894B (zh) * 2021-09-29 2024-01-05 中国科学院西安光学精密机械研究所 一种基于等离子体态电解质的储能器件

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1299916B1 (fr) * 2000-06-29 2004-07-07 Wolfgang Kollmann Procede de production de materiau metallise et pile et pile a combustible contenant ce materiau
KR101171835B1 (ko) * 2009-07-03 2012-08-14 한국생산기술연구원 친수성 고분자로 표면개질된 폴리올레핀 미세다공성막, 그의 표면개질방법 및 표면개질된 폴리올레핀 미세다공성막을 구비한 리튬이온폴리머전지
EP2465161A2 (fr) * 2009-08-14 2012-06-20 The Regents Of The University Of Michigan Synthèse de projection à chaud directe de composants de batterie lithium-ion

Also Published As

Publication number Publication date
US20130171370A1 (en) 2013-07-04
DE102011122658A1 (de) 2013-07-04
WO2013097939A1 (fr) 2013-07-04

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