WO2019052813A1 - Procédé de fabrication d'une pile d'électrodes pour un élément de batterie et élément de batterie - Google Patents

Procédé de fabrication d'une pile d'électrodes pour un élément de batterie et élément de batterie Download PDF

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Publication number
WO2019052813A1
WO2019052813A1 PCT/EP2018/073290 EP2018073290W WO2019052813A1 WO 2019052813 A1 WO2019052813 A1 WO 2019052813A1 EP 2018073290 W EP2018073290 W EP 2018073290W WO 2019052813 A1 WO2019052813 A1 WO 2019052813A1
Authority
WO
WIPO (PCT)
Prior art keywords
segments
separator element
separator
electrode
battery cell
Prior art date
Application number
PCT/EP2018/073290
Other languages
German (de)
English (en)
Inventor
Thomas Peter
Mirko Maier
Bernhard Gossen
Martin Reusch
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2019052813A1 publication Critical patent/WO2019052813A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling 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 invention relates to a method for producing an electrode stack for a battery cell from plate-shaped electrode segments and stacking of the segments.
  • the invention also relates to a battery cell, the one
  • Electrical energy can be stored by means of batteries. Batteries convert chemical reaction energy into electrical energy. Here are batteries.
  • Primary batteries and secondary batteries distinguished. Primary batteries are only functional once, while secondary batteries, also referred to as accumulators, are rechargeable. In particular, so-called lithium-ion battery cells are used in an accumulator. These are characterized among other things by high energy densities, thermal stability and extremely low self-discharge. Lithium-ion battery cells have a positive electrode, also known as
  • Cathode is called, and a negative electrode, which is also referred to as anode on.
  • the cathode and the anode each include one
  • the electrodes of the battery cell are formed like a film and with the interposition of a
  • Electrode stack stacked The electrodes can also become one
  • the two electrodes of the electrode unit are electrically connected to poles of the battery cell, which are also referred to as terminals.
  • the electrodes and separator are surrounded by a generally liquid electrolyte.
  • the battery cell further comprises a cell housing, which is made of aluminum, for example.
  • the cell housing is usually prismatic, in particular cuboid, designed and pressure-resistant. But other forms of housing, such as circular cylindrical, or flexible pouch cells are known.
  • An essential goal in the development of new battery cells is to increase the electrochemical useful volume in the cell. The most suitable design of an electrode unit for maximizing the useful volume of the
  • Electrode stack exposed as this can be made both ideal prismatic and in any other geometry.
  • Electrode stack having an anode and a cathode.
  • the anode and the cathode in this case comprise a plurality of plate-shaped segments which are stacked one above the other with the interposition of plate-shaped separators to the electrode stack.
  • the separators Connect from separators and electrodes known.
  • the separators have a layer of polypropylene and a ceramic layer.
  • Transport unit transports two separators and one in between
  • Separatorfolienbahn filed and a second Separatorfolienbahn is deposited on the electrode sheet.
  • the Separatorfolienbahnen and the electrode sheet are sucked by means of a vacuum belt and transported on. Disclosure of the invention
  • Battery cell proposed. The method comprises at least the steps listed below.
  • a band-shaped separator element is provided.
  • Separator element is present flat and band-shaped. In this context, this means that an expansion of the separator element in a longitudinal direction is much greater, in particular at least ten times greater, than an extension of the separator element in a transverse direction, which is oriented at right angles to the longitudinal direction.
  • Electrodes are flat and plate-shaped. In this context, this means that an extension of the
  • Electrode segments in the longitudinal direction approximately the same size, in particular at least half as large and at most twice as large, is like a
  • the electrode segments can be, for example, anode segments which comprise an anodic current conductor to which an anodic active material is applied. Similarly, it may be at the
  • the band-shaped separator element is moved by a transport device in a transport direction, while the electrode segments are deposited in a storage area of a conveyor unit on the separator.
  • the longitudinal direction runs parallel to the transport direction.
  • the electrode segments are pressed in a subsequent to the storage area transport area of at least one guide band of the transport device on the separator.
  • the transport area extends from the storage area in the transport direction.
  • the guide band is, for example, formed circumferentially and deflected several times.
  • Transport area runs the guide belt in the transport direction.
  • Transport device generates a vacuum, by means of which the
  • Electrode segments are sucked through in the transport region through the separator. Thus, the electrode segments are additionally held on the separator.
  • a vacuum is generated in the transport device, by means of which the
  • Transport device is sucked through.
  • the separator is held on the conveyor belt.
  • a vacuum is generated in the transport device, by means of which the
  • Transport device is sucked through.
  • the conveyor belt of the transport device is additionally pressed by a pressure roller against the conveyor unit.
  • the storage area in which the electrode segments are pressed onto the separator element is located between the pressure roller and the conveyor unit.
  • Electrode segments pressed in a central portion of the separator.
  • the central section lies in the transverse direction at least approximately centrally on the electrode segments and the separator.
  • the electrode segments are pressed in two edge portions on the separator.
  • the edge sections lie in the transverse direction on both sides outside on the electrode segments and the separator.
  • another band-shaped separator is on the
  • the electrode segments are so between the two
  • Electrode segments plate-shaped stack segments generated. If that
  • Composite element having anode segments now cathode segments are applied. If the composite element has cathode segments, anode segments are now applied.
  • Each stack segment thus comprises an anode segment, a cathode segment and two separator segments.
  • the stack segments then become the
  • Electrode stack stacked It is also proposed a battery cell, the at least one
  • Electrode stack which is produced by the process according to the invention.
  • a battery cell according to the invention advantageously finds use in one
  • Electric vehicle in a hybrid vehicle (HEV), in a plug-in hybrid vehicle (PHEV) or in a consumer electronics product.
  • Consumer electronics products are in particular mobile phones, tablet PCs or notebooks.
  • the inventive method allows a reduction in the required process time in stacking the electrodes and the separator to the
  • Electrode stack Advantageously, the electrode segments can be deposited with high precision on the Separatorelement and transported on.
  • a displacement of the electrode segments relative to the separator element on the transport device is advantageously reduced or avoided.
  • one guide band or several guide bands can be used.
  • FIG. 1 shows a schematic illustration of a battery cell
  • FIG. 2 shows a schematic representation of a plant for the production of electrode stacks for battery cells
  • Figure 3 is a schematic representation of a transport device and a
  • FIG. 4 shows a schematic perspective view of the conveying unit and the transporting device from FIG. 2 according to a first embodiment
  • FIG. 5 shows a schematic perspective view of the conveying unit and the transporting device from FIG. 2 according to a second embodiment
  • Figure 6 is a plan view of a band-shaped composite element
  • FIG. 7 shows a schematic representation of an electrode stack formed from a plurality of stack segments.
  • FIG. 1 shows a schematic representation of a battery cell 2
  • Battery cell 2 comprises a housing 3, which is prismatic, in the present cuboid, is formed.
  • the housing 3 is in this case carried out electrically non-conductive.
  • the housing 3 may also be made of aluminum, for example, or formed in the form of a flexible pouch film.
  • the battery cell 2 comprises a negative terminal 11 and a positive terminal 12. Via the terminals 11, 12, one of the battery cell 2 may be available Asked voltage to be tapped. Furthermore, the battery cell 2 can also be charged via the terminals 11, 12.
  • an electrode unit is arranged, which is embodied here as an electrode stack 10.
  • Electrode stack 10 has two electrodes, namely an anode 21 and a cathode 22, on.
  • the anode 21 and the cathode 22 are each designed like a film and separated by a separator 18 from each other.
  • the separator 18 is ionically conductive, that is permeable to lithium ions.
  • the anode 21 comprises an anodic active material 41 and an anodic current conductor 31.
  • the anodic current conductor 31 is made electrically conductive and made of a metal, for example of copper.
  • the anodic current collector 31 is electrically connected to the negative terminal 11 of the battery cell 2.
  • the cathode 22 comprises a cathodic active material 42 and a
  • the cathodic current collector 32 is made electrically conductive and made of a metal, for example
  • the cathodic current collector 32 is electrically positive
  • Terminal 12 of the battery cell 2 connected.
  • FIG. 2 shows a schematic representation of a system 60 for producing electrode stacks 10 for battery cells 2.
  • a belt-shaped separator element 16 is fed to a transport device 110 from a first separator roller 71.
  • the transport device 110 may be a circulating belt or even a linear mover system or the like. On the
  • the supply of the band-shaped anode element 45 is effected via a plurality of deflection rollers not shown here to a circulating in a conveying direction 68 conveyor unit 100.
  • the conveyor unit 100 is provided with a cleaning unit 90, which comprises a suction device for particle removal includes.
  • the conveyor unit 100 is associated with a laser 96 or other, in particular knife-like cutter.
  • the laser 96 or the cutting device makes a cut through the band-shaped anode element 45, as a result of which plate-shaped anode segments 55 are produced, as is also shown in particular in FIG.
  • the anode segments 55 are connected to the
  • Feeding unit 100 fixed by means of a vacuum before the anode segments 55 are deposited on the separator 16 on the transport device 110. This results in a band-shaped composite element 50, wherein the anode segments 55 are arranged regularly spaced from each other.
  • Anode segments 55 are largely enclosed between the two separator elements 16.
  • the linear mover system 76 comprises, for example, individual slides which can be subjected to negative pressure
  • linear mover system 76 is assigned to individual discrete stacking devices 78 arranged on its underside.
  • a laser cut 80 of the arrangement of composite element 50 and further separator element 16 transferred to the linear mover system 76 is preferably carried out by means of a laser 96.
  • a cut can also be made with another cutting tool.
  • Three-layered stacks are formed which comprise two separator segments 53 and an intermediate anode segment 55. These three-layered stacks are fixed laterally by means of gripping devices and / or vacuum on individual mutually separate vacuum-actuatable carriages of the linear mover system 76. From Figure 2 it is apparent that the linear mover system 76 is associated with a driven wheel 92.
  • cathode roll 62 This is acted upon by a ribbon-shaped cathode element 46 by a cathode roll 62, which is preferably cut on the wheel 92 by a laser 96 into cathode segments 56. You can also make a cut with another cutting tool.
  • the separated from the band-shaped cathode member 46 cathode segments 56 are fixed within a vacuum region 86 on the driven wheel 92 and the transported from the individual carriages of the linear mover system 76 dreilagig formed stack of two
  • the stack segments 58 are plate-shaped and comprise two separator segments 53, an anode segment 55 and a cathode segment 56.
  • Vacuum region 86 also has a blow-off 88.
  • the laser section of the cathode element 46 is preferably carried out by means of the laser 96.
  • the laser 96 which is preferably a CO 2 laser or a short-pulse laser, a knife-like cutting device can be used to the plate-shaped
  • the driven wheel 92 is provided with a cleaning unit 90.
  • Figure 3 shows a schematic representation of a transport device 110 and a conveyor unit 100 of the system 60 of Figure 2.
  • Anode element 45 is applied to the conveyor unit 100 by the anode roller 61.
  • the conveyor unit 100 runs in the conveying direction 68.
  • the band-shaped anode element 45 cut into plate-shaped anode segments 55.
  • the anode segments 55 are cut, in particular, in the transverse direction y, which runs at right angles to the conveying direction 68 and, in the present case, is oriented perpendicular to the plane of the drawing.
  • contour cuts are performed to produce tabs 35 of the anode 21 on the anode segments 55.
  • the band-shaped separator element 16 is applied to the transport device 110 by the first separator roller 71.
  • that will be described below are applied to the transport device 110 by the first separator roller 71.
  • Transport belt 112 of the transport device 110 applied.
  • the separator 16 is transported in the transport direction 64.
  • Transport device 110 is thereby generated a vacuum, by means of which the separator 16 is sucked in the feed region 107 through the conveyor belt 112 therethrough.
  • the separator 16 is placed on the
  • Conveyor belt 112 held.
  • the delivery unit 100 can for this purpose have a blow-off region 88. This creates that
  • Anode segments 55 are also separated from each other in the composite element 50 by a corresponding gaps 51.
  • Transport device 110 is by a pressure roller 116 against the
  • the storage area 106 is located between the pressure roller 116 and the conveyor unit 100. In the vicinity of the pressure roller 116 may also be a vacuum, in particular an increased vacuum abut.
  • a transport region 108 which adjoins the deposition region 106, the anode segments 55 are pressed onto the separator element 16 by at least one guide band 114.
  • the transport region 108 extends from the storage region 106 in the transport direction 64.
  • the at least one guide band 114 is embodied circumferentially and repeatedly diverted.
  • the guide belt 114 extends in the transport direction 64.
  • a vacuum is generated by means of which the anode segments 55 in the transport region 108 are sucked through the separator element 16.
  • the anode segments 55 are additionally held on the Separatorelement 16 and can be easily detached from the guide tape 114.
  • FIG. 4 shows a schematic perspective view of the conveyor unit 100 and the transport device 110 from FIG. 2 according to a first embodiment
  • the conveyor unit 100 is in the form of a cylindrical roller and rotates in the conveying direction 68.
  • the anode element 45 is not shown here.
  • the separator element 16 is transported by the transport device 110 in the transport direction 64.
  • the conveyor belt 112 is also not shown here.
  • the transport device 110 has two guide belts 114, which are arranged offset from one another in the transverse direction y. A part of the conveyor unit 100 is surrounded by the guide belts 114 in the transverse direction y. The anode segments 55 are in two edge portions 124 of the
  • Edge portions 124 lie in the transverse direction y on both sides outside on the separator 16.
  • the contact lugs 35 of the anode segments 55 protrude laterally beyond the separator 16 in the transverse direction y.
  • FIG. 5 shows a schematic perspective view of the conveyor unit 100 and the transport device 110 from FIG. 2 according to a second embodiment
  • the delivery unit 100 is in the form of a stepped cylindrical roller, which in the present case has a central cylinder section 132 and two outer cylinder sections 136 located laterally therefrom.
  • the outer cylinder sections 136 have the same diameter, which is greater than the diameter of the central cylinder section 132.
  • the outer cylinder portions 136 and the central cylinder portion 132 of the conveyor unit 100 are rotatably connected to each other.
  • the conveyor unit 100 rotates in the conveying direction 68.
  • the anode element 45 is not shown here.
  • the separator element 16 is moved by the transport device 110 into the
  • the conveyor belt 112 is also not shown here.
  • the transport device 110 has a guide band 114 which is arranged approximately centrally on the separator element 16 in the transverse direction y. A part of the guide belt 114 is surrounded in the transverse direction y by the outer cylinder sections 136 of the conveyor unit 100.
  • Guide tape 114 is in the transverse direction y below the central
  • Cylinder portion 132 arranged.
  • the anode segments 55 are pressed onto the separator element 16 in a central section 122.
  • the central portion 122 lies in the transverse direction y at least approximately centrally on the
  • the contact lugs 35 of the anode segments 55 protrude laterally beyond the separator 16 in the transverse direction y.
  • FIG. 6 shows a plan view of a band-shaped composite element 50.
  • the plate-shaped anode segments 55 lie in a longitudinal direction x, which runs at right angles to the transverse direction y, spaced apart on the band-shaped separator element 16.
  • the anode segments 55 are in the longitudinal direction x through the gaps 51 separated.
  • the anode segments 55 lie approximately completely on the
  • the anode segments 55 have contact lugs 35 of the anode 21, which extend in the transverse direction y.
  • the contact lugs 35 of the anode 21 protrude laterally beyond the separator 16 in the transverse direction y.
  • Figure 7 shows a schematic representation of one of several
  • Each stack segment 58 has, as already mentioned, an anode segment 55, a cathode segment 56 and two separator segments 53.
  • one of the separator segments 53 is arranged between the anode segment 55 and the cathode segment 56, in this case, the anode segment 55 between the two
  • Separator segments 53 is arranged.
  • the anode segments 55 together form the anode 21 of the electrode stack 10.
  • the cathode segments 56 together form the cathode 22 of the
  • Electrode stack 10 The Separatorsegmente 53 together form the
  • Contact lugs 35 of the anode 21 are welded together and electrically connected to the negative terminal 11 of the battery cell 2.
  • the contact lugs 36 of the cathode 22, not shown here, are also welded together and electrically connected to the positive terminal 12 of the battery cell 2.

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  • Secondary Cells (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une pile d'électrodes pour un élément de batterie. Le procédé comprend des étapes suivantes consistant à : fournir un élément séparateur (16) en forme de bande ; fournir plusieurs segments d'électrode (55) en forme de panneaux ; générer un élément composite (50) en forme de bande en déposant les segments d'électrode (55) sur l'élément séparateur (16). L'élément séparateur (16) est déplacé par un dispositif de transport (110) dans une direction de transport (64), tandis que les segments d'électrode (55) sont déposés dans une zone de dépôt (106) par une unité de convoyage (100) sur l'élément séparateur (16). Les segments d'électrode (55) sont pressés, dans une zone de transport (108) située dans le prolongement de la zone de dépôt (106), par au moins une bande de guidage (114) du dispositif de transport (110), sur l'élément séparateur (16). L'invention concerne également un élément de batterie qui comprend au moins une pile d'électrodes qui est fabriquée selon le procédé de l'invention.
PCT/EP2018/073290 2017-09-13 2018-08-30 Procédé de fabrication d'une pile d'électrodes pour un élément de batterie et élément de batterie WO2019052813A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017216143.4 2017-09-13
DE102017216143.4A DE102017216143A1 (de) 2017-09-13 2017-09-13 Verfahren zur Herstellung eines Elektrodenstapels für eine Batteriezelle und Batteriezelle

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WO2019052813A1 true WO2019052813A1 (fr) 2019-03-21

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WO (1) WO2019052813A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112310423B (zh) * 2019-12-04 2022-03-15 宁德时代新能源科技股份有限公司 叠片电芯生产系统以及叠片电芯成型方法
DE102022128232A1 (de) 2022-10-25 2024-04-25 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zur Herstellung von Batterieelektroden

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EP0397640A2 (fr) * 1989-05-10 1990-11-14 ELBAK Batteriewerke Gesellschaft m.b.H. Dispositif pour l'enveloppement et l'empilage de plaques positives ou négatives d'accumulateurs
JP2012227126A (ja) 2011-04-07 2012-11-15 Nissan Motor Co Ltd 袋詰電極の製造装置、および袋詰電極の製造方法
EP2747186A1 (fr) * 2012-02-28 2014-06-25 Nagano Automation Co., Ltd. Dispositif et procédé de fabrication de corps d'électrode
EP2770569A2 (fr) * 2013-02-26 2014-08-27 Hitachi Power Solutions Co., Ltd. Procédé de fabrication de cellules empilées et appareil l'utilisant
US8844795B2 (en) 2010-11-25 2014-09-30 Kyoto Seisakusho Co., Ltd. Electrode plate wrapping device and method of wrapping electrode plate with separators
JP2015072833A (ja) 2013-10-03 2015-04-16 日産自動車株式会社 電気デバイスのセパレータ接合方法および電気デバイスのセパレータ接合装置
DE102014113588A1 (de) 2014-09-19 2016-03-24 Manz Ag Verfahren zur Herstellung einer Batteriezelle
DE102015202894A1 (de) 2015-02-18 2016-08-18 Robert Bosch Gmbh Batteriezelle

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FR850976A (fr) * 1938-03-29 1939-12-30
NL8803036A (nl) * 1988-12-09 1990-07-02 Paramelt Syntac Bv Werkwijze voor de vervaardiging van platen uit thermoplastisch materiaal alsmede inrichting voor het vervaardigen daarvoor.
JPH11133572A (ja) * 1997-08-26 1999-05-21 Fuji Photo Film Co Ltd 熱処理装置及びその装置を使用した熱現像装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0397640A2 (fr) * 1989-05-10 1990-11-14 ELBAK Batteriewerke Gesellschaft m.b.H. Dispositif pour l'enveloppement et l'empilage de plaques positives ou négatives d'accumulateurs
US8844795B2 (en) 2010-11-25 2014-09-30 Kyoto Seisakusho Co., Ltd. Electrode plate wrapping device and method of wrapping electrode plate with separators
JP2012227126A (ja) 2011-04-07 2012-11-15 Nissan Motor Co Ltd 袋詰電極の製造装置、および袋詰電極の製造方法
EP2696420A1 (fr) 2011-04-07 2014-02-12 Nissan Motor Company, Limited Dispositif et procédé de production d'une électrode intégrée
EP2747186A1 (fr) * 2012-02-28 2014-06-25 Nagano Automation Co., Ltd. Dispositif et procédé de fabrication de corps d'électrode
EP2770569A2 (fr) * 2013-02-26 2014-08-27 Hitachi Power Solutions Co., Ltd. Procédé de fabrication de cellules empilées et appareil l'utilisant
JP2015072833A (ja) 2013-10-03 2015-04-16 日産自動車株式会社 電気デバイスのセパレータ接合方法および電気デバイスのセパレータ接合装置
DE102014113588A1 (de) 2014-09-19 2016-03-24 Manz Ag Verfahren zur Herstellung einer Batteriezelle
DE102015202894A1 (de) 2015-02-18 2016-08-18 Robert Bosch Gmbh Batteriezelle

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