WO2019052882A1 - Procédé de correction de position d'empilements d'électrodes lors de leur pose - Google Patents

Procédé de correction de position d'empilements d'électrodes lors de leur pose Download PDF

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Publication number
WO2019052882A1
WO2019052882A1 PCT/EP2018/073926 EP2018073926W WO2019052882A1 WO 2019052882 A1 WO2019052882 A1 WO 2019052882A1 EP 2018073926 W EP2018073926 W EP 2018073926W WO 2019052882 A1 WO2019052882 A1 WO 2019052882A1
Authority
WO
WIPO (PCT)
Prior art keywords
stack
correction
stacking
deposited
segment
Prior art date
Application number
PCT/EP2018/073926
Other languages
German (de)
English (en)
Inventor
Thomas Peter
Mirko Maier
Bernhard Gossen
Michael Holm
Christian Diessner
Andreas Letsch
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 WO2019052882A1 publication Critical patent/WO2019052882A1/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
    • 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
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 invention relates to a method for position correction of
  • 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 functional only once while secondary batteries, also referred to as rechargeable batteries, 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 referred to as a cathode, and a negative electrode, called an anode.
  • the cathode and the anode each comprise a current conductor, on which an active material is applied.
  • the electrodes of the battery cell are formed like a foil and stacked, for example, to form an electrode stack with the interposition of a separator which separates the anode from the cathode.
  • the electrodes can also be wound into an electrode winding or in some other way form an electrode unit.
  • 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. As a rule, the cell housing is prismatic, in particular cuboid and pressure-resistant. But other forms of housing, such as circular cylindrical or flexible pouch cells are known
  • the electrode stack has proven to be the most suitable design of an electrode unit for maximizing the useful volume, since it can be produced both in an ideal prismatic manner and in any other geometry.
  • the production of electrode stacks is usually carried out on equipment comprising stacking devices on which the individual electrode stacks are stacked.
  • Such stacking devices are known for example from WO 2012/137918 AI.
  • the correction in the X direction is performed by the individual table of the linear conveyor system 76 in the X direction and / or
  • the correction in the Y direction is effected by moving the stacking device in the Y direction.
  • Reference storage position for subsequent stack segments to be deposited when depositing can be achieved by adhering to precise storage positions that on the one hand the stack layers are precisely on top of each other and thereby a maximum active area can be formed, which ultimately the
  • an angle correction about a C axis can be determined, which is implemented by rotation of, for example, a storage station of the stacking device. Accordingly, not only linear corrections in the X or Y direction are advantageously feasible, but the electrode stacks to be deposited, which form the stack, can be produced by angular rotation of the deposition station
  • Stacking device to achieve the reference storage position can be positioned so that the electrode stack to be deposited position correct correct.
  • the first vision system scans a first corner area at the end of one of the first vision systems
  • Vision system feels the first corner area of the still to be deposited
  • the correction in the X-direction is generated in particular by the individual table of the linear conveyor system
  • the correction of the position in the Y-direction of the individual electrode to be deposited can be carried out by a relative movement of the stack of the stacking device.
  • the second vision system scans a second corner area of the already formed stack at the end of surface diagonals of the stack.
  • the second vision system scans the second corner area from the top of the stack already formed of individual electrode stacks. From the scan by the second vision system can advantageously a rotation of a
  • Deposition station of the stacking device can be determined about the C-axis to position the stack already formed relative to the electrode stack to be deposited on the stacking device. If a stack segment to be deposited is detected in which the correction paths, be it in the X direction or in the Y direction, exceed predefined limits with respect to the reference storage position stored and detected in the first storage operation, this electrode stack to be deposited becomes the individual tables of the linear conveyor system transported in the X direction on the stacking device over to a trigger device and removed there.
  • a stack of stacked electrode stacks reaches its predetermined height, it is removed from the stacking device, whereby it is ensured that no new electrode stacks to be deposited are supplied during this removal or replacement process of the stacking device in question.
  • a battery cell which comprises at least one electrode stack, which is produced by the method according to the invention.
  • EV electric vehicle
  • HEV hybrid vehicle
  • PHEV plug-in hybrid vehicle
  • consumer electronics products are in the present
  • Reference storage position is ensured in subsequent storage operations that the largest possible active area of individual formed from stack segments electrode stack later in the operation of one of several
  • Electrode stack formed battery cell is present, which affects their performance of the life and their charge or discharge characteristics during their operation in an extremely advantageous manner.
  • the vision systems used which detect and store the reference storage position at the first depositing and determine the deviation of the position of the stacking segment to be deposited relative to the reference storage position, can advantageously correct the position of the respective stacked segment to be deposited with respect to the first deposit
  • Either the movement of the individual tables on the linear conveyor system in the X direction can be influenced or the unloading station of the stacking device already accommodating the stack of electrodes is moved in the Y direction or the already formed electrode stack received on the unloading station of the stacking device is moved around the C axis, which moves in the vertical direction with respect to the already formed electrode stack extends.
  • a 3-layer stack of separator segment, cathode segment and separator on the one hand and an anode segment on the other hand can each be manufactured separately. These can be done using robots and suction pads of the manufacturing plant each are taken and stored on a common stack each in an alternating sequence.
  • FIG. 1 shows a schematic illustration of a battery cell
  • Figure 2 shows the essential components of a plant for the production of
  • Figure 3 shows the representation of a linear conveyor system, with ongoing
  • FIG. 4 shows the vision systems which calculate a deviation of the position of an electrode stack to be deposited with respect to an already formed stack
  • FIG. 5 is a schematic representation of the electrode stack with the
  • 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 designed to be electrically conductive and manufactured, for example, from aluminum.
  • the housing 3 can also be designed 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, a voltage provided by the battery cell 2 can be tapped off. 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.
  • the electrode stack 10 has two electrodes, namely an anode 21 and a cathode 22.
  • the anode 21 and the cathode 22 are each designed like a foil and separated from each other by a first belt-shaped separator 18.
  • the first band-shaped 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 electrical designed conductive and made of a metal, for example
  • FIG. 1 shows a schematic representation of the components of a system 58 for
  • FIG. 2 shows a system 58 for producing electrode stacks.
  • a feed 60 for a first belt-shaped separator 18 is fed to a transport device 62.
  • the transport device 62 can be a circulating belt or else a linear conveyor system 76 or the like.
  • the first belt-shaped separator 18 is transported in the transport direction 64.
  • the transport device 62 is a coil supply of a first band-shaped material 66 for a first electrode, for example the cathode.
  • a peripheral surface 94 of the driven wheel 92 is associated with a laser 96 or a knife-like cutter. Below the laser 96 or cutter, a cut 68 of the first belt-shaped material 66 for the first electrode (cathode) is made, whereby a portion 70, i. on
  • Cathode segment 56 is generated.
  • the severed portion 70 becomes on the peripheral surface 94 of the driven wheel 92 within a
  • the driven wheel 92 is provided with a drive 90 which includes an encoder and a drive control such that the driven wheel 92 is alternately alternately accelerated and decelerated during its rotation, such that when the sections 70 are deposited on the first belt-shaped separator 18 on the top of the transport device 62 defined gaps are generated. Thereafter, the supply 72 of a second belt-shaped separator 19. This is transferred to the transport device 62, so that the first belt-shaped separator 18 and the regularly spaced separated sections 70 are covered by the second belt-shaped separator 19.
  • the linear conveyor system 76 comprises
  • individual discrete stacking devices 78 are assigned to the linear conveyor system 76 on its underside.
  • a cut 80 preferably a laser cut, of the arrangement of the first belt-shaped separator 18, section 70 of the first electrode, transferred to the linear conveyor system 76, takes place.
  • These 3-layer stacks 106 are fixed laterally by means of gripping devices or vacuum on individual separate vacuum-loadable tables or carriages of the linear conveyor system 76.
  • band-shaped material 82 for a second electrode the anode, which is cut at position 84, preferably by a laser 96.
  • the sections 70 separated from the second belt-shaped second electrode material 82, i. the anode segments 55, are within the
  • first belt-shaped separator 18, section 70 for the second electrode and second belt-shaped separator 19 are applied and form individual four-layer stack segments 52.
  • the driven wheel 92 which is arranged above the linear conveyor system 76, also a
  • Vacuum region 86 and a blow-off 88 has.
  • a cut 84 of the second second electrode tape material 82 i. the anode, preferably by means of the laser 96.
  • the laser 96 which is preferably a solid or pulsed (ns or ps) working solid-state laser
  • a knife-like cutting device can be used to the individual sections 70 at this point separate from the second band-shaped material 82 for the second electrode.
  • FIG. 3 shows the illustration of a linear conveyor system 76 with circumferential individual tables 102 conveying the stack segments 52 and a number of stacking devices 78 arranged below the linear conveyor system 76.
  • FIG. 3 shows that a number of stacking devices 78 are located below the linear conveyor system 76.
  • Stacking devices include storage stations which are movable in the Y direction 114. Along a rail 104 are on the linear conveyor system 76th
  • the stack segments 52 for the electrode stacks 10 are fixed on the tops of the individual tables 102 by clamps or by gripper systems and pass beneath the linear conveyor system 76 arranged first vision system 118. By means of the first vision system 118, the position of the stack segments 52 is determined.
  • the individual tables 102 with the electrode stacks 10 received thereover move along the rail 104 in the X direction 110.
  • the storage of the stack segments 52 takes place in the Z direction 112.
  • Staging stations of the stacking device 78 can each be moved in the Y direction 114.
  • the linear conveyor system 76 is assigned a take-off device 138.
  • the extraction device 138 comprises a hopper 140, via which to be removed from a single table 102
  • Stacking segments 142 can be deducted.
  • the discharge device 138 is acted upon by a suction air flow 144.
  • FIG. 4 shows a stack segment 52, which is accommodated on a single table 102 of the linear conveyor system 76, which is not shown in FIG. 4 and is located in an overhead position.
  • the stack segment 52 comprises a separator segment 53, a cathode segment 56, a further separator segment 53 and finally the end applied, cf. illustration according to FIG. 3
  • Anode segment 55 (counted from top to bottom).
  • the four-ply stack segments 52 to be deposited in an overhead position as shown in FIG. 4 are measured by the first vision system 118 from the underside within a first corner region 122.
  • an edge 146 in the X direction 110 and an edge 148 in the Y direction 114 converge. From the position of the edges 146, 148, a center point 150 of the stacking segment 52 to be deposited is determined.
  • the C-axis identified by reference numeral 116 extends from this center 150 of the stack segment 52 to be deposited in a vertical downward direction.
  • the top of a formed stack 134 is measured, on the position and position exactly stack segments 52 are stored in a stacking height 136 in the exact position.
  • Their filing was previously made with reference to the first filing
  • the second vision system 120 scans a second corner area 124 of the top of the already formed stack 134. Both the first corner region 122 scanned by the first vision system 118 and the second corner region 124 scanned by the second vision system 120 lie at the end of one of the two diagonals 126, 128 of the stacking segment 52 to be deposited Stack 134 off
  • the reference storage position 152 now represents the theoretical zero point with respect to the X direction 110, the Y direction 114, and the angular position with respect to the C axis 116. At this theoretical zero, i.
  • Reference filing position 152 is referenced each time a stackable segment 52 to be stacked in overhead position is deposited.
  • each newly deposited stack segment 52 is always positioned at this theoretical zero point and not on the previously stored stack segment 52. This avoids a tolerance addition and improves the accuracy of the stack formation.
  • a correction in the X-direction 132, compare representation according to Figure 3 is preferably carried out by a targeted control of the corresponding individual table 102 in the X direction 110, which receives the stacking segment 52 to be deposited.
  • a correction in the Y direction 130 takes place in accordance with the Y axis 114 registered on the stacking device 78 in FIG
  • the second vision system 120 determines an angle correction in which the already formed stack 134 of positionally stored stacking segments 52 with respect to
  • Reference tray position 152 is to be rotated if necessary.
  • To the Angle correction is the storage station of the respective
  • Stacking device 78 to rotate about the C-axis 116 which extends in the vertical direction of Figure 4.
  • Angular deviations of up to 2 ° to maximum deviations in the X direction 110 and Y direction 114 of approximately plus / minus 0.1 millimeters relative to the angular position about the C axis 116 reduced by approximately plus / minus 0.1 ° become.
  • the formed stack 134 has reached its stack height 136, i. If no further stack segments 52 can be deposited on the stack 134 that has been formed, it must be exchanged. For this purpose, a storage station of the stacking device 78 performs a long stroke, while at the same time a new storage station in the
  • Storage station of the stacking device 78 moves in, from which the stack formed 134 was removed. During the meantime passing time is ensured that the individual tables 102 to this concerned
  • Figure 5 shows a schematic representation of one of several
  • Stacking segments 52 formed electrode stack 10. Each stacking segment 52 has an anode segment 55, a cathode segment 56 and two
  • Separator segments 53 on.
  • one of the separator segments 53 is arranged between the anode segment 55 and the cathode segment 56, wherein in the present case the anode segment 55 is arranged between the two separator segments 53.
  • the anode segments 55 together form the anode 21 of the electrode stack
  • the cathode segments 56 together form the cathode 22 of the
  • Electrode stack 10 The Separatorsegmente 53 together form the first band-shaped separator 18 of the electrode stack 10. The not here

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

Abstract

L'invention concerne un procédé de correction de position d'empilements d'électrodes (10) à poser lors de la pose sur un dispositif d'empilement (78). Sont effectuées des étapes de procédé qui suivent : a) la position d'un segment (52) d'empilement à poser sur un empilement (134) formé est détectée par au moins un système de vision (118, 120) en tant que position de pose de référence (152) lors de la première pose ; b) la position de pose de référence (152) détectée selon l'étape a) et mémorisée forme un point zéro théorique par rapport à une position X, Y et une position angulaire ; c) au moins une correction dans la direction Y (130) et/ou une correction dans la direction X (132) sont définies à partir d'un écart entre la position de pose de référence (152) mémorisée selon l'étape de procédé a) et un point central (150) d'un segment (52) d'empilement à poser par la suite ; d) la correction dans la direction X (132) est effectuée par la table individuelle (102) du système de convoyage (76) linéaire dans la direction X (110) ; et/ou e) la correction dans la direction Y (130) est effectuée par le déplacement du dispositif d'empilement (78) dans la direction Y (114).
PCT/EP2018/073926 2017-09-13 2018-09-06 Procédé de correction de position d'empilements d'électrodes lors de leur pose WO2019052882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017216158.2A DE102017216158A1 (de) 2017-09-13 2017-09-13 Verfahren zur Positionskorrektur von Elektrodenstapeln bei deren Ablegen
DE102017216158.2 2017-09-13

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WO2019052882A1 true WO2019052882A1 (fr) 2019-03-21

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WO (1) WO2019052882A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021220771A1 (fr) * 2020-04-30 2021-11-04 株式会社村田製作所 Dispositif d'empilement
JPWO2021220770A1 (fr) * 2020-04-30 2021-11-04

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
DE102018219079A1 (de) * 2018-11-08 2020-05-14 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Stapels von Elektrodenelementen sowie Stapel von Elektrodenelementen
DE102021207346A1 (de) * 2021-07-12 2023-01-12 Körber Technologies Gmbh Vorrichtung zum Entnehmen oder Abzweigen von Produktsegmenten aus einem Produktstrom der Energiezellen produzierenden Industrie
DE102022105874A1 (de) 2022-03-14 2023-09-14 Körber Technologies Gmbh Stapelstation und Stapelverfahren für die Batteriezellen produzierende Industrie
DE102022124784A1 (de) 2022-09-27 2024-03-28 Mb Atech Gmbh Inspektion bei der Herstellung von Modulen oder Vorstufen von Modulen
DE102022124788B3 (de) 2022-09-27 2024-01-18 Mb Atech Gmbh Inspektion bei der Herstellung von Modulen oder Vorstufen von Modulen

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WO2012137918A1 (fr) 2011-04-07 2012-10-11 日産自動車株式会社 Dispositif et procédé de stratification
EP2696422A1 (fr) * 2011-04-07 2014-02-12 Nissan Motor Co., Ltd Dispositif et procédé de détection de position d'électrode
CN104215182A (zh) * 2014-09-09 2014-12-17 深圳市斯尔顿科技有限公司 一种锂电池卷绕层边界位移的检测方法
CN106159311A (zh) * 2016-09-14 2016-11-23 东莞新能源科技有限公司 电芯堆叠定位装置及定位方法

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WO2012137918A1 (fr) 2011-04-07 2012-10-11 日産自動車株式会社 Dispositif et procédé de stratification
EP2696422A1 (fr) * 2011-04-07 2014-02-12 Nissan Motor Co., Ltd Dispositif et procédé de détection de position d'électrode
CN104215182A (zh) * 2014-09-09 2014-12-17 深圳市斯尔顿科技有限公司 一种锂电池卷绕层边界位移的检测方法
CN106159311A (zh) * 2016-09-14 2016-11-23 东莞新能源科技有限公司 电芯堆叠定位装置及定位方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021220771A1 (fr) * 2020-04-30 2021-11-04 株式会社村田製作所 Dispositif d'empilement
JPWO2021220770A1 (fr) * 2020-04-30 2021-11-04
JPWO2021220771A1 (fr) * 2020-04-30 2021-11-04
WO2021220770A1 (fr) * 2020-04-30 2021-11-04 株式会社村田製作所 Dispositif de lamination
JP7323060B2 (ja) 2020-04-30 2023-08-08 株式会社村田製作所 積層装置
US11820118B2 (en) 2020-04-30 2023-11-21 Murata Manufacturing Co., Ltd. Lamination device
JP7472970B2 (ja) 2020-04-30 2024-04-23 株式会社村田製作所 積層装置

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