WO2024046830A1 - Empilement de piles pour un élément de batterie - Google Patents

Empilement de piles pour un élément de batterie Download PDF

Info

Publication number
WO2024046830A1
WO2024046830A1 PCT/EP2023/073099 EP2023073099W WO2024046830A1 WO 2024046830 A1 WO2024046830 A1 WO 2024046830A1 EP 2023073099 W EP2023073099 W EP 2023073099W WO 2024046830 A1 WO2024046830 A1 WO 2024046830A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
mono
electrode
stack
separator
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.)
Ceased
Application number
PCT/EP2023/073099
Other languages
German (de)
English (en)
Inventor
Tobias JANSEN
Christian Klemt
Alexander Tornow
Marco Jordan
Adrian BECKER
Dennis Böhm
Knut Tracht
Manfred Folger
Dennis Springborn
Patrick Gögel
Nils Hofmann
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to EP23761819.4A priority Critical patent/EP4581694A1/fr
Priority to CN202380074313.9A priority patent/CN120019516A/zh
Publication of WO2024046830A1 publication Critical patent/WO2024046830A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0459—Cells or batteries with folded separator between 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
    • 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
    • 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
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • 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 mono-cell stack for a battery cell according to the preamble of claim 1 and a method or a process arrangement for producing such a mono-cell stack according to claim 10.
  • An electrode/separator stack for a battery cell can, for example, be manufactured in a Z-fold, in which an endless separator web is folded in a Z-fold around electrode sheets arranged one above the other.
  • the electrode/separator stack can be manufactured as a generic mono-cell stack. This has a number of monocells stacked one above the other in the stacking direction. Each of the monocells is alternately assembled in the stacking direction from an electrode sheet, a separator sheet, a counter-electrode sheet and a further separator sheet, for example in a laminating station, to form a one-piece structural unit.
  • the series production of such a mono-cell stack can be carried out at a significantly higher process speed than with an electrode/separator stack manufactured in Z-folding.
  • An electrode arrangement is known from US 2019/0189976 A1.
  • a rechargeable battery is known from EP 3 246 979 A1.
  • An electrode arrangement and a method for producing such an electrode arrangement are known from WO 2020/121044 A1.
  • An electrode/separator stack for a battery cell is known from US 2010/0190081 A1.
  • Another electrode arrangement for a battery cell is known from EP 3242 346 A1.
  • the object of the invention is to provide a mono-cell stack for a battery cell that allows large-scale production, with greater process speed and/or reduced manufacturing effort compared to the prior art.
  • the task is solved by the features of claim 1 or claim 10.
  • Preferred developments of the invention are disclosed in the subclaims.
  • the invention is based on a mono-cell stack for a battery cell, which has a number of mono-cells stacked one above the other in the stacking direction. Each of these monocells is assembled alternately in the stacking direction from an electrode sheet, a separator sheet, a counter-electrode sheet and a further separator sheet.
  • the two separator sheets are components of a double sheet layer.
  • the double sheet layer is folded around the electrode sheet in a U-fold along a fold edge.
  • the counter electrode sheet is arranged on the outside of one of the separator sheets.
  • a process arrangement for producing such a mono-cell stack has the following process steps: First, the electrode sheet, the counter-electrode sheet and the double sheet layer are cut from an endless web in a cutting device. The electrode sheet is then placed on the double sheet layer in a first laying device. In the further process, the double sheet layer is folded around the electrode sheet along the folded edge using a folding device. The counterelectrode sheet is then arranged on the outside of one of the separator sheets using a second laying device. The still loose sheet structure is then fed to a laminating device in which the electrode and separator sheets are laminated to form a monocell. The completed monocell is transferred to a stacking device in which the monocells are stacked to form a monocell stack.
  • the mono-cell stack can end in the stacking direction at its two stack ends with a counter-electrode sheet each.
  • the counter electrode sheet can preferably be an anode sheet, while the electrode sheets can be implemented as cathode sheets.
  • the monocells can be stacked in the monocell stack with an identically repeating electrode-separator sheet sequence in the stacking direction, starting from a first stack end to a second stack end.
  • an end monocell with an external counterelectrode sheet preferably anode sheet
  • an end monocell with an external separator sheet can be arranged at the second end of the stack.
  • a single counterelectrode sheet that is, in particular an anode sheet
  • the individual counter-electrode sheet is manufactured in an upstream process step as a separate structural unit, i.e. independently of the monocells.
  • a single electrode sheet (preferably a single anode sheet) can be stacked on the outer counter electrode sheet of the first stack end, with a separator sheet in between.
  • the individual electrode sheet and the separator sheet can be joined together to form a layer composite before the stacking process. This can be stacked onto the external counter electrode sheet during the stacking process.
  • the mono-cell stack can be divided into at least two sub-stacks in the stacking direction.
  • the monocells can be stacked with an electrode-separator sheet sequence that repeats itself identically in the stacking direction.
  • the second partial stack can be turned over by 180° compared to the first partial stack. In this case, the monocells are stacked in the second sub-stack with a reversed electrode-separator sheet sequence that repeats itself identically in the stacking direction.
  • the two partial stacks lie opposite each other in the stacking direction, each with a separator sheet of the double sheet layer, with the interposition of a single counterelectrode sheet (in particular an anode).
  • the electrode sheets and/or the counter-electrode sheets can each be formed in a conventional manner from a current conductor film with electrode coating on both sides.
  • the electrode sheets and/or the counter-electrode sheets can each be extended with laterally projecting arrester lugs.
  • the folded edges of the double sheet layers in the mono-cell stack viewed in the stacking direction, can be arranged alternately on opposite mono-cell stack sides.
  • the fold edges of the double sheet layers in the mono-cell stack can be arranged on the same mono-cell stack side.
  • the conductor tabs of the electrode sheets and/or the counter-electrode sheets can, for example, be aligned parallel to the folded edges.
  • the arrester tabs of the electrode sheets can protrude on the side opposite the folded edge.
  • Figures 1 to 3 show a mono-cell stack according to a first exemplary embodiment
  • Figures 4 to 6 each show views which illustrate a process sequence for producing the mono-cell stack
  • Figures 7 to 11 further embodiment variants of the mono-cell stack.
  • the monocell 1 shows a mono-cell stack for a battery cell, which is constructed from a number of mono-cells 1 stacked one above the other in the stacking direction.
  • the monocell 1 is constructed (from top to bottom) of a cathode sheet K, a separator sheet S1, an anode sheet A and a further separator sheet S2, which are joined together in a lamination process.
  • the cathode sheet K and the anode sheet A are each formed in a manner known per se from a current conductor film 3, which is coated on both sides with an electrode coating 5.
  • the current arrester foil 3 is each extended with a cathode-side arrester lug 7 ( Figures 8 to 11) or an anode-side arrester lug 9 ( Figures 8 to 11).
  • the two separator sheets S1, S2 are components of a double sheet layer D.
  • the double sheet layer D is folded around the cathode sheet K in a U-fold along a fold edge 11.
  • the anode sheet A is arranged on the outside on the lower separator sheet S2 in FIG. 3.
  • the mono-cell stack ends in the stacking direction at its two stack ends with an anode sheet A each.
  • the mono-cell stack in Figures 1 and 2 is divided into two sub-stacks 13, 15 in the stacking direction.
  • the monocells M are stacked with an identically repeating electrode-separator sheet sequence in the stacking direction, that is to say from bottom to top with the first separator sheet S1, the cathode sheet K, the second separator sheet S2 and the anode sheet A.
  • the monocells M are also stacked in the lower second sub-stack 15 with an identically repeating electrode-separator sheet sequence in the stacking direction, that is to say from top to bottom with the first separator sheet S1, the cathode sheet K, the second separator sheet S2 and the anode sheet A.
  • the lower one The second sub-stack 15 is therefore turned over by 180° compared to the upper first sub-stack 13.
  • the anode sheet A of each monocell M is positioned at the bottom, followed by the second separator sheet S2, the cathode sheet K and the first separator sheet S.
  • the first separator sheet S1 opposite the respective double sheet layer D, namely with an intermediate layer a single anode sheet AE, which is not part of a monocell M, but rather is manufactured separately from it.
  • the cathode sheet K, the anode sheet A and the double sheet layer D are cut from endless web goods into individual sheets in a cutting device, as shown in Figure 4 .
  • the cathode sheet K is then placed on the double sheet layer D in a first laying device (FIG. 4).
  • the double sheet layer D is folded around the cathode sheet K in a U-fold along the fold edge 11 (FIG. 5).
  • the anode sheet A is positioned on the outside of the separator sheet S2. This is followed by lamination, which is not indicated, in which the individual sheets are put together in a laminating device in the still loose mono-cell sheet structure.
  • the monocells M are then stacked in a stacking device to form a monocell stack.
  • FIGS. 7 to 11 Further exemplary embodiments of the mono-cell stack are shown in FIGS. 7 to 11.
  • the mono-cell stack shown in FIG. 7 is constructed essentially identically to the mono-cell stack shown in FIG. 1. In contrast to FIGS. 1 or 2, in FIG. 7 all folding edges 11 are positioned on a common mono-cell stack side.
  • the mono-cell stack shown in FIG. 8 essentially corresponds to the mono-cell stack shown in FIG. 7.
  • the arrester lugs 7, 9 each protrude outwards at right angles to the folded edges 11. Accordingly, the cathode-side arrester lugs 7 are extended to the left monocell stack side, while the anode-side arrester lugs 9 are extended to the right monocell stack side.
  • FIG. 9 shows a further mono-cell stack which is not formed from two stacks 13, 15 with an intermediate central anode AE. Rather, in Figure 9, the monocells M are stacked with an identically repeating electrode-separator sheet sequence in the stacking direction S, from an upper first stack end to a lower second stack end. An end-side monocell M with an external anode sheet A is arranged at the upper first end of the stack. In contrast, at the bottom is the second end of the stack an end monocell M with an external separator sheet S1 is arranged. A single anode sheet AE is additionally stacked on the external separator sheet S1 of the lower second end of the stack.
  • the monocells M are constructed differently in contrast to the previous figures:
  • the double sheet layer D is no longer folded around the cathode sheet K, but rather around the anode sheet A.
  • the cathode sheet K is arranged on the outside of the separator sheet S2.
  • the monocells M are also stacked in the monocell stack with an identically repeating electrode-separator sheet sequence in the stacking direction, again from an upper first stack end to a lower second stack end.
  • An end-side monocell M with an external first separator sheet S1 is arranged at the upper first end of the stack.
  • An end-side monocell M with an external cathode sheet K is arranged at the lower second end of the stack.
  • a layer composite 17 is stacked on the outer cathode sheet K of the lower first stack end, which is formed from a single anode sheet AE, around which a separator double sheet layer is folded.
  • the individual anode sheet AE is therefore arranged on the lower cathode sheet K with a separator sheet S in between.
  • FIG. 11 A mono-cell stack according to a further exemplary embodiment is shown in FIG.
  • the mono-cell stack shown in FIG. 11 is constructed essentially identically to the mono-cell stack shown in FIG. 10.
  • the anode-side and cathode-side arrester lugs 7, 9 protrude at right angles to the folded edges 11.
  • the anode-side arrester lugs 9 protrude from the left side of the monocell stack, while the cathode-side arrester lugs 7 protrude from the right side of the monocell stack.

Landscapes

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

Abstract

L'invention concerne un empilement de piles conçu pour un élément de batterie, comprenant un certain nombre de piles (M) superposées dans le sens de l'empilement, dont chaque pile (M) est composée, en alternance dans le sens de l'empilement, d'une feuille d'électrode (K), d'une feuille de séparateur (S1), d'une feuille d'électrode complémentaire (A) et d'une autre feuille de séparateur (S2). Selon l'invention, les deux feuilles de séparateur (S1, S2) sont des composants d'une couche de feuilles double (D) qui sont repliés selon un pliage en U le long d'un bord de pliage (11) autour de la feuille d'électrode (K). La feuille d'électrode complémentaire (A) est disposée du côté extérieur sur l'une des feuilles de séparateur (S1, S2).
PCT/EP2023/073099 2022-09-01 2023-08-23 Empilement de piles pour un élément de batterie Ceased WO2024046830A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23761819.4A EP4581694A1 (fr) 2022-09-01 2023-08-23 Empilement de piles pour un élément de batterie
CN202380074313.9A CN120019516A (zh) 2022-09-01 2023-08-23 用于电池电芯的单电芯堆垛

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022122168.7A DE102022122168A1 (de) 2022-09-01 2022-09-01 Monozellstapel für eine Batteriezelle
DE102022122168.7 2022-09-01

Publications (1)

Publication Number Publication Date
WO2024046830A1 true WO2024046830A1 (fr) 2024-03-07

Family

ID=87847760

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/073099 Ceased WO2024046830A1 (fr) 2022-09-01 2023-08-23 Empilement de piles pour un élément de batterie

Country Status (4)

Country Link
EP (1) EP4581694A1 (fr)
CN (1) CN120019516A (fr)
DE (1) DE102022122168A1 (fr)
WO (1) WO2024046830A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250233266A1 (en) * 2024-01-16 2025-07-17 GM Global Technology Operations LLC Battery assembly and method for forming battery assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100190081A1 (en) 2006-06-13 2010-07-29 Hey Woong Park Stacking-typed secondary battery providing two or more operation voltages
EP3242346A1 (fr) 2016-05-02 2017-11-08 Samsung SDI Co., Ltd Assemblage d'électrodes
EP3246979A1 (fr) 2016-05-19 2017-11-22 Samsung SDI Co., Ltd. Batterie rechargeable
US20190189976A1 (en) 2017-12-18 2019-06-20 Samsung Sdi Co., Ltd. Electrode assembly
WO2020121044A1 (fr) 2018-12-13 2020-06-18 Do Fluoride Jiaozuo New Energy Tech Co Ltd Unité d'assemblage d'électrodes, procédé de fabrication et cellule de batterie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5811034B2 (ja) * 2012-05-28 2015-11-11 株式会社豊田自動織機 非水系蓄電装置及びリチウムイオン二次電池
KR102254264B1 (ko) * 2018-02-01 2021-05-21 주식회사 엘지에너지솔루션 전극조립체 및 이의 제조 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100190081A1 (en) 2006-06-13 2010-07-29 Hey Woong Park Stacking-typed secondary battery providing two or more operation voltages
EP3242346A1 (fr) 2016-05-02 2017-11-08 Samsung SDI Co., Ltd Assemblage d'électrodes
EP3246979A1 (fr) 2016-05-19 2017-11-22 Samsung SDI Co., Ltd. Batterie rechargeable
US20190189976A1 (en) 2017-12-18 2019-06-20 Samsung Sdi Co., Ltd. Electrode assembly
WO2020121044A1 (fr) 2018-12-13 2020-06-18 Do Fluoride Jiaozuo New Energy Tech Co Ltd Unité d'assemblage d'électrodes, procédé de fabrication et cellule de batterie

Also Published As

Publication number Publication date
EP4581694A1 (fr) 2025-07-09
DE102022122168A1 (de) 2024-03-07
CN120019516A (zh) 2025-05-16

Similar Documents

Publication Publication Date Title
DE202022003257U1 (de) Elektrodenbaugruppe, Batterie und Batteriepack und ein selbige umfassendes Fahrzeug
DE69920080T2 (de) Verfahren und Vorrichtung zum Formen von Streckmetall und Verwendung dieses Streckmetalls in einer Batterie
EP3069404B1 (fr) Ensemble d'électrodes, procédé pour sa fabrication et pile électrochimique
EP3304632B1 (fr) Procédé et dispositif servant à plier en accordéon une bande de matériau
DE102017210744A1 (de) Elektrochemische Batteriezelle für ein Batteriemodul und Verfahren zur Herstellung einer Batteriezelle sowie Batteriemodul
DE102010055611A1 (de) Verfahren zum Herstellen eines Elektrodenstapels aus Kathode, Anode und Separator
DE1671932B2 (de) Brennstoffbatterie
DE112013007016T5 (de) Energiespeichervorrichtung, Verfahren zu deren Herstellung und Vorrichtung zu deren Herstellung
DE202022100440U1 (de) Sekundärbatterie-Laminiervorrichtung
EP4248510A1 (fr) Procédé de fabrication d'un ensemble membrane-électrode et ensemble membrane-électrode pour une pile à combustible
WO2012062423A1 (fr) Procédé et dispositif pour fabriquer un accumulateur d'énergie électrochimique
WO2024046830A1 (fr) Empilement de piles pour un élément de batterie
DE102010055608A1 (de) Verfahren zum Herstellen eines Elektrodenstapels aus Kathode, Anode und Separator
DE102010055617A1 (de) Verfahren zum Herstellen eines Elektrodenstapels aus Kathode, Anode und Separator
DE212022000200U1 (de) Elektrodenanordnung
EP4423834A1 (fr) Procédé et machine de fabrication d'empilement de cellules de l'industrie de production de cellules énergétiques
DE102012213111B4 (de) Verfahren und Anordnung zur effizienten Herstellung von Folienstapeln zur Bildung einer Lithium-Ionen-Batteriezelle
EP4430691A1 (fr) Procédé et dispositif de production de cellules énergétiques empilées
EP4423835A1 (fr) Pliage de séparateur
EP2652817A1 (fr) Procédé et système de fabrication d'objets en forme de feuille ou de plaque
EP1528972B1 (fr) Films et systemes composites de films a motifs de perforation, notamment concus pour produire des composants electrochimiques
DE102019202161A1 (de) Verfahren zur Herstellung von Batterieelektroden
DE102022109431B4 (de) Separatorfalten
EP4553930A2 (fr) Empilement d'électrodes/séparateur pour un élément de batterie ainsi que procédé de fabrication d'un tel empilement d'électrodes/séparateur
WO2023285276A1 (fr) Produit intermédiaire et procédé de production d'éléments composites dans l'industrie de la production de piles à combustible

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23761819

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023761819

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2023761819

Country of ref document: EP

Effective date: 20250401

WWE Wipo information: entry into national phase

Ref document number: 202380074313.9

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 202380074313.9

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2023761819

Country of ref document: EP