EP3172783A1 - Procédé de production d'un élément de batterie prismatique - Google Patents

Procédé de production d'un élément de batterie prismatique

Info

Publication number
EP3172783A1
EP3172783A1 EP15739637.5A EP15739637A EP3172783A1 EP 3172783 A1 EP3172783 A1 EP 3172783A1 EP 15739637 A EP15739637 A EP 15739637A EP 3172783 A1 EP3172783 A1 EP 3172783A1
Authority
EP
European Patent Office
Prior art keywords
winding
cathode layer
anode layer
layer
battery
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Withdrawn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
EP15739637.5A
Other languages
German (de)
English (en)
Inventor
Antonio BACHER
Seyed Mohammad Seyed Abbassi
Cihan KAPLAN
Michael Riefler
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.)
Robert Bosch GmbH
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 EP3172783A1 publication Critical patent/EP3172783A1/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Withdrawn legal-status Critical Current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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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 producing a prismatic
  • Battery cell wherein the battery cell has a cathode layer, an anode layer and at least two separator layers.
  • the invention also relates to a prismatic battery cell, which is produced by the method, as well as a vehicle in which such a prismatic battery cell is installed.
  • Lithium ion batteries which are used in the automotive sector, often have a prismatic shape for reasons of volumetric efficiency.
  • a cell housing Inside a cell housing are, for example, flat-pressed battery wraps (jelly rolls), which are rolled out of an anode, a cathode and separator layers. The cell housing is filled after inserting the battery wraps and before the pressure-tight sealing with a liquid electrolyte.
  • No. 8,641,015 B2 for example, provides such a prismatic battery cell with four battery wraps arranged therein.
  • the cathode and the anode are referred to, for example, as follows:
  • the two electrodes are not precisely superimposed, but slightly offset in the direction of the winding axis. This method is described for example in DE 10 2012 213 420 AI.
  • the positive voltage of the respective electrode can be picked off on one open narrow side of the battery winding, and on the other, opposite, open narrow side.
  • the contacting of the protruding Film strip is made with welded, strip-shaped sheet metal parts made of copper or aluminum, the so-called current collectors.
  • the contacting of the current collectors inside the cell housing and the passage of the current paths through the cell housing to the outside is very demanding. After inserting the battery wraps in the cell housing and after closing the cell housing this is filled with a small opening in the lid of the cell housing with electrolyte. As one of the last processes in the production of the battery cell, this opening with a
  • Jelly Rolls are known from US 5,552,239 and JP 2009-266737.
  • the prismatic battery cell comprises a cathode layer, an anode layer and two separator layers, comprises the following steps: a) winding a starting arrangement with the cathode layer, the
  • Anode layer and the two separator layers about a winding axis for producing a battery turn wherein the cathode layer and the anode layer each have longitudinal sides and transverse sides and are wound with the transverse sides parallel to the winding axis,
  • Anode layer are tailored during delivery to the starting arrangement on each of its longitudinal sides to form the pads.
  • An advantage of the invention is that no more uncoated long electrode edge is needed.
  • Cell housing is used, the cathode layer and the anode layer with
  • Pantographs are contacted and the cell housing is filled with a liquid electrolyte is in principle arbitrary.
  • exactly one battery winding is inserted into the cell housing, wherein the battery winding has exactly one cathode layer and exactly one anode layer.
  • Pantographs are used per electrode.
  • the cathode layer and the anode layer may be referred to in the context of the present disclosure as a cathode, anode or collectively also as electrodes.
  • Pads of the cathode layer and the anode layer on the same side are also arranged offset to one another. Due to the spatial separation of the pads, an electrical insulation of the cathode and the anode can be insured. Particularly preferred is a maximum offset of the opposite pole pads to each other, each pad is always located exactly between two opposite pole pads.
  • the cutting of the cathode layer and the anode layer during the supply to the starting arrangement is preferably carried out by means of a laser. An advantage here is the free choice of shape. Furthermore, the laser can be integrated directly into the winding machine. This results in a minimum
  • the punching tool can be integrated in the winding machine. Alternatively, the
  • Punching be provided as an external process.
  • Electrodes designed.
  • protruding lugs which are electrically contacted with the current collectors as connecting surfaces of the longitudinal sides of the cathode layer and the anode layer.
  • step b) the battery winding is inserted into the cell housing such that a filling opening and / or a bursting membrane lie in alignment with the winding axis.
  • the battery wraps need to be inserted into the cell housing such that a filling opening and / or a bursting membrane lie in alignment with the winding axis.
  • Battery cell is a main direction of the resulting dynamics parallel to the winding axis. Thus it is facilitated that at an overpressure the liquid or gases escape at the burst opening.
  • in the alignment of the winding axis is meant that the filling opening is either on the winding axis or at a small distance to this.
  • Wickelhist is provided. In step a) it is wound around the winding blade.
  • the winding blade is formed, for example, as a flat plate having a rectangular cross section with a first longer side and a second shorter side.
  • the winding blade is made for example of plastic, in particular of a weldable and / or beklebbaren electrolyte-resistant plastic.
  • step a) first the cathode layer and the anode layer and the two separator layers are attached to the winding blade.
  • the anode and the cathode are welded to the welding surfaces
  • the winding blade may be provided to remove the winding blade after winding, resulting in an increase in the energy density of the battery.
  • the winding blade can be referred to as a winding core in the invention.
  • the winding axis is parallel to a shorter side of the winding blade, so that the starting arrangement is wound around the shorter side of the winding blade.
  • the cathode layer and the anode layer are in this embodiment on surfaces on the
  • Wickelthrot attached, which extend over the shorter side of the winding sword.
  • a motor vehicle is also provided with a battery, wherein the battery has at least one such battery cell.
  • the battery is preferably connected to a drive system of the motor vehicle.
  • the motor vehicle may be designed as a pure electric vehicle and comprise an exclusively electric drive system.
  • the motor vehicle may be equipped as a hybrid vehicle including an electric drive system and an internal combustion engine.
  • the battery of the hybrid vehicle can be charged internally via a generator with excess energy of the internal combustion engine.
  • Externally rechargeable hybrid vehicles PHEV, plug-in hybrid electric vehicle
  • PHEV plug-in hybrid electric vehicle
  • FIG. 1 shows a prismatic battery cell according to the prior art in a perspective view
  • FIG. 2 shows a winding sword
  • Figure 5A, 5B a battery winding in a sectional view and side plan view according to an embodiment of the invention and Figures 6A, 6B conventional and inventive cover groups and battery wraps in a lateral plan view in comparison.
  • FIG. 1 shows a prismatic battery cell 10 'in a perspective view according to the prior art.
  • the prismatic battery cell 10 ' is shown for the sake of clarity without a cell housing and comprises four closely arranged battery wraps 12' and a cover group 46 ', wherein the cover group 46' two terminals 14 ', whereby the prismatic battery cell 10' is electrically contacted from the outside ,
  • the lid group 46 ' is also a filling opening 16' and a
  • the filling opening 16 'and the bursting membrane 18' are located substantially in the center of a closure plate 47 ', whereas the terminals 14' on the end plate 47 'are peripherally located.
  • the liquid electrolyte is filled vertically in FIG. 1 via the filling opening 16 'and then passes horizontally into the
  • FIG. 2 shows a winding sword 26.
  • the winding blade 26 is formed for example of a plastic plate 48.
  • the plastic plate 48 has a rectangular base with a longer side 50 and a shorter side 52.
  • a conventional winding direction 60 ' is proposed to the longer side 50th is a winding direction 60 to the shorter side 52.
  • the winding axis 40 is arranged parallel to the shorter side 52.
  • FIG. 3 shows a starting arrangement 22 with the winding blade 26, two
  • Wickelthrot 26 as described with reference to Figure 2 is configured.
  • FIG. 2 Shown is a sectional view along the winding axis of Figure 2. With an arrow, the winding direction 60 of the starting assembly 22 is shown.
  • the cathode layer 30 and the anode layer 32 are attached to the winding blade 26 via welding surfaces 54, 56.
  • the two Separatorlagen 28 are glued opposite each other to the winding blade 26 and isolate the
  • FIG. 4A shows a conventional electrode 30 ', 32' which has a
  • Pad 36 ', 38' which extends completely over a longitudinal side 70 'of the electrode 30', 32 ', wherein the longitudinal side 70' longer than a
  • Transverse side 72 ' is.
  • FIG. 4B shows an electrode 30, 32 according to the invention, wherein the latter has connecting surfaces 36, 38 formed as lugs 74, which extends over a transverse side 72 of the electrode 30, 32.
  • An active material coatable surface 64 'of the conventional electrode 30', 32 ' is the same size as an active material coatable surface 64 of the electrode 30, 32 of the present invention. Since the size of the pads 36, 38 is lower than that of the conventional electrode electrode according to the invention
  • the cathode layer 30 and the anode layer 32 are fed to a winding device of endless belts and thereby cut in the illustrated form.
  • the flags 74 are by means of a laser from the strip with
  • a distance a between the flag 74 is kept constant or slightly increased to the
  • the lugs 74 of the cathode layer 30 are arranged maximally offset from the lugs of the anode layer 32 and one above the other in order to obtain the battery winding 12 in FIG. 5B.
  • the laser can be cut externally with a laser during the operation before winding.
  • the laser can also be installed directly in the winding machine to inline the flags 74 cut out.
  • the winding does not necessarily have to be done around the winding blade 26.
  • the separator layers 28, cathode layer 30, and anode layer 32 are rolled up without a squeegee 26.
  • a winding blade 26 In the event that a winding blade 26 was used in the winding, it can be removed after the winding process or remain in the battery winding 12. Preferably, it is removed to the volume weight of the
  • prismatic battery cell 10 to reduce.
  • the winding blade 26 it is preferably made of metal with a clamping device.
  • the Separatorlagen 28 By holding the Separatorlagen 28 at the start of winding can then be wound. After completing the winding, the tensioner opens and reduces the span. Thus, a withdrawal is possible.
  • Figure 5A shows a sectional view of a battery roll 12, which after
  • Winding of the starting arrangement 22 shown in Figure 3 is formed.
  • Wickel 12 is the winding sword 26.
  • Wickelatt 26 are the wound layers 62.
  • the outermost of the wound layers 62 is a Separatorlage 28th
  • FIG. 5B shows a lateral plan view of the battery winding 12, which arises after winding the starting arrangement 22 shown in FIG.
  • the arrangement shown in Figure 5A is shown rotated by 90 °.
  • the lugs 74 of the connection surfaces 36, 38 project laterally out of the wound layers 62, so that a contact with a cover group 46 as in FIG. 6A can be shown, wherein the pads 36, 38 are welded to corresponding pantographs 42, 44.
  • the cathode layer 30 and the anode layer 32 are arranged at a distance a / 2.
  • FIG. 6A shows a prismatic battery cell 10 with a cover group 46 according to the invention and the battery winding 12 in an exploded view.
  • the cover group 46 has the end plate 47 with the filling opening 16 arranged thereon, the bursting membrane 18 and terminals 14, as well as the first current collector 42 of the cathode and the second current collector 44 of the anode.
  • the battery winding 12 can be inserted into the cell housing (not shown) in such a way that the inflow direction 20 of the liquid electrolyte is parallel to the filling opening 16 and to the bursting membrane 18.
  • the housing of the prismatic battery cell 10 also advantageously only a single battery winding 12 is arranged, which means an increase in the energy density.
  • Figures 6A and 6B also show the shortening of the contacting of the battery roll 12 with the terminals 14 of the cover group 46, which results with the embodiment according to the invention ( Figure 6A) compared to the prior art ( Figure 6B).
  • the current collectors 42, 44 are short and straight, since the terminals 14 are opposite the pads 36, 38.
  • the pads 36 ', 38' are not arranged opposite to the terminals 14 'but laterally of the battery roll 12', so that the current collectors 42 ', 44' are correspondingly longer and must also be shaped.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne un procédé de production d'un élément de batterie prismatique (10), l'élément de batterie prismatique (10) comprenant une couche cathodique, une couche anodique et deux couches de séparation. Le procédé comprend les étapes consistant à : enrouler un ensemble de démarrage comprenant la couche cathodique, la couche anodique et les deux couches de séparation autour d'un axe d'enroulement pour produire un enroulement de batterie (12), la couche cathodique et la couche anodique comprenant chacune des côtés longitudinaux et des côtés transversaux et étant enroulées par leurs côtés transversaux parallèlement à l'axe d'enroulement, insérer l'enroulement de batterie (12) dans un boîtier d'élément, mettre en contact les surfaces de raccordement (36, 38) de la couche cathodique et de la couche anodique avec des collecteurs de courant (42, 44), remplir le boîtier d'élément d'un électrolyte liquide et fermer le boîtier d'élément. Selon l'invention, la couche cathodique et la couche anodique sont découpées pendant leur amenée à l'ensemble de démarrage au niveau de respectivement un de leurs côtés longitudinaux pour la formation des surfaces de raccordement (36, 38). L'invention concerne par ailleurs un élément de batterie prismatique (10) et un véhicule comprenant une batterie, laquelle comporte au moins un élément de batterie prismatique (10) de ce type.
EP15739637.5A 2014-07-25 2015-07-23 Procédé de production d'un élément de batterie prismatique Withdrawn EP3172783A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014214716.6A DE102014214716A1 (de) 2014-07-25 2014-07-25 Verfahren zur Herstellung einer prismatischen Batteriezelle
PCT/EP2015/066942 WO2016012568A1 (fr) 2014-07-25 2015-07-23 Procédé de production d'un élément de batterie prismatique

Publications (1)

Publication Number Publication Date
EP3172783A1 true EP3172783A1 (fr) 2017-05-31

Family

ID=53716508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15739637.5A Withdrawn EP3172783A1 (fr) 2014-07-25 2015-07-23 Procédé de production d'un élément de batterie prismatique

Country Status (6)

Country Link
US (1) US20170237125A1 (fr)
EP (1) EP3172783A1 (fr)
JP (1) JP2017525112A (fr)
CN (1) CN106537649A (fr)
DE (1) DE102014214716A1 (fr)
WO (1) WO2016012568A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107706464A (zh) * 2017-08-21 2018-02-16 科爱慕株式会社 附带激光开槽的一体型卷绕机

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US5552239A (en) 1994-08-29 1996-09-03 Bell Communications Research, Inc. Rechargeable battery structure and method of making same
JP5127271B2 (ja) * 2007-03-12 2013-01-23 株式会社東芝 捲回型電極電池およびその製造方法
GB0710104D0 (en) 2007-05-25 2007-07-04 Fjoelblendir Ltd Carburettors
JP2009266737A (ja) 2008-04-28 2009-11-12 Panasonic Corp リチウムイオン二次電池およびその製造方法
JP5225002B2 (ja) * 2008-09-30 2013-07-03 株式会社東芝 二次電池
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Also Published As

Publication number Publication date
CN106537649A (zh) 2017-03-22
US20170237125A1 (en) 2017-08-17
JP2017525112A (ja) 2017-08-31
WO2016012568A1 (fr) 2016-01-28
DE102014214716A1 (de) 2016-01-28

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