EP2745338A1 - Dispositif accumulateur d'énergie et procédé de fabrication dudit dispositif accumulateur d'énergie - Google Patents

Dispositif accumulateur d'énergie et procédé de fabrication dudit dispositif accumulateur d'énergie

Info

Publication number
EP2745338A1
EP2745338A1 EP12751258.0A EP12751258A EP2745338A1 EP 2745338 A1 EP2745338 A1 EP 2745338A1 EP 12751258 A EP12751258 A EP 12751258A EP 2745338 A1 EP2745338 A1 EP 2745338A1
Authority
EP
European Patent Office
Prior art keywords
contact
energy storage
contact portion
storage device
section
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Withdrawn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
EP12751258.0A
Other languages
German (de)
English (en)
Inventor
Joerg Kaiser
Jens Meintschel
Claus-Rupert Hohenthanner
Harald REICHE
Alexander Hoernig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Li Tec Battery GmbH
Original Assignee
Li Tec Battery GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Li Tec Battery GmbH filed Critical Li Tec Battery GmbH
Publication of EP2745338A1 publication Critical patent/EP2745338A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • 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
    • 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
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side 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
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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

Definitions

  • the present invention relates to an energy storage device, in particular an electrochemical energy storage device, and a method for producing such an energy storage device.
  • Electrochemical energy storage devices usually have at least one electrochemical energy storage cell (often referred to as electrochemical or galvanic cell), at least one current arrester, a housing for receiving the energy storage cell and the Stromableiters and at least one contact element.
  • an electrochemical energy storage cell has an electrode stack with an arrangement of at least two electrodes and an electrolyte arranged between them, which is at least partially enclosed by an envelope.
  • the two electrodes or electrode groups of the electrode stack are each electrically conductively connected to a current conductor, which serves for transporting electrical energy into the energy storage cell or out of the energy storage cell.
  • the current conductors are in turn each connected to an electrically conductive contact element which serves the electrical connection of the energy storage device, for example within a battery arrangement with a plurality of energy storage devices. It is the object of the present invention to provide an improved energy storage device, in particular an improved energy storage device with a compact connection of the contact element to the current collector.
  • the energy storage device of the invention comprises an energy storage cell having an electrode stack and a cladding; at least one current arrester, which has a first contact section electrically connected to the electrode stack of the energy storage cell and a second contact section arranged at least partially outside the enclosure of the energy storage cell; and at least one contact element, which has a first contact portion electrically connected to the second contact portion of the current conductor and a second contact portion for electrically contacting the energy storage device, on.
  • the energy storage device according to the invention is characterized in that the first contact portion and the second contact portion of the current collector are substantially parallel to each other.
  • the second contact portion of the current collector which is electrically connected to the first contact portion of the contact element, substantially parallel to the first contact portion of the Stromableiters, which is electrically conductively connected to the electrode stack of the energy storage cell aligned.
  • an (electrochemical) energy storage device is understood as meaning a device which is capable of picking up, storing and releasing in particular electrical energy, in particular by utilizing electrochemical processes.
  • an energy storage cell is understood within the meaning of the invention, a self-contained functional unit of the energy storage device, which in itself is also able to absorb electrical energy, store and release again, in particular by utilizing electrochemical processes.
  • An energy storage device according to the invention may comprise an energy storage cell or a plurality of energy storage cells.
  • An energy storage cell can, for example, but not just a galvanic primary or secondary cell (in the context of this application, primary or secondary cells indiscriminately referred to as battery cells and an energy storage device constructed therefrom as a battery or battery assembly), a fuel cell, a high power capacitor or an energy storage cell of another kind be.
  • an energy storage cell is to be understood as meaning an electrochemical energy storage cell which stores energy in chemical form, delivers it in electrical form to a consumer and preferably can also receive it in electrical form from a charging device.
  • electrochemical energy stores are galvanic cells and fuel cells.
  • An electrochemical energy storage cell preferably has an active region or active part in which electrochemical conversion and Storage processes take place, and an enclosure for encapsulating the active part of the environment.
  • the active part preferably has an electrode stack which is formed from an electrode arrangement of electrodes, active layers, separator layers and an electrolyte accommodated by the separator layers.
  • the electrodes are preferably plate-shaped or foil-like and are preferably arranged substantially parallel to one another (prismatic energy storage cells).
  • the electrode assembly may also be wound and have a substantially cylindrical shape (cylindrical energy storage cells).
  • the term electrode stack should also include such electrode coils.
  • the active layers and separator layers may be at least partially provided as independent foil blanks or as coatings of the electrodes.
  • the electrolyte of the energy storage cell preferably contains lithium ions.
  • the sheath in this context is a device which is suitable for preventing the escape of chemicals from the electrode stack into the environment and for protecting the constituents of the electrode stack from damaging external influences.
  • the envelope may be formed from one or more moldings and / or film-like. Next, the envelope may be formed in one or more layers.
  • the sheath is preferably formed from a gas-tight and electrically insulating material or layer composite.
  • An electrochemical energy storage cell is preferably provided or connected with at least two Stromableitern, which serve as electrical poles of the energy storage cell.
  • These current conductors are each electrically connected to electrodes of the electrode stack of the energy storage cell or formed by them themselves.
  • a current conductor is understood as meaning both a separate component, which is electrically conductively connected to the electrodes of the energy storage cell, preferably with portions of the electrodes projecting out of the envelope, as well as through the electrodes themselves, preferably through the envelope understood protruding portions of the electrodes self-formed current conductor become.
  • the current conductor can be considered as a component of the energy storage cell or as a different component of this.
  • the at least two current conductors are preferably arranged on the same side of the energy storage cell; but they can also be arranged on different sides, preferably on mutually opposite sides of the energy storage cell.
  • the current conductors of the energy storage device each have a first contact section, which is electrically conductively connected to the electrode stack of the energy storage cell.
  • This first contact portion of the current conductor may extend completely within the enclosure, partially within and partially outside the enclosure, or completely outside the enclosure of the energy storage cell.
  • the current conductors furthermore each have a second contact section arranged outside the enclosure of the energy storage cell. This second contact portion is preferably plate-shaped.
  • the plate-shaped second contact section of the current conductor preferably has a substantially constant thickness or material thickness.
  • the second contact section serves for the electrically conductive connection with the contact element of the energy storage device. At least the second contact section of the current conductor is at least partially disposed outside the enclosure of the energy storage cell.
  • the energy storage cell and the current collector of the energy storage device are preferably accommodated in a housing.
  • a housing in this context is any constructive device which is suitable for receiving and mechanically stabilizing the energy storage cell and the current conductor (s) therein and / or preventing or complicating mass transport between the components of the electrochemical energy storage cell and its environment. Stabilization is particularly, but not exclusively, advantageous during the manufacturing process of a battery assembly having multiple energy storage devices.
  • the term housing is intended to include both devices which the energy storage cell and the current collector substantially completely enclose, as well as devices which support these components only partially (according to a frame) include.
  • the housing may preferably be formed in one piece or in several parts.
  • the housing is also suitable and intended to prevent or complicate an undesirable energy exchange of the energy storage device with its environment, especially if in this case energy, especially in non-electrical form, would be undesirably exchanged, for example thermal energy or mechanical energy.
  • a contact element is understood as any device which is suitable for producing an electrically conductive connection between the surroundings of the energy storage device and a current conductor of the energy storage device (inside the housing). About this electrically conductive connection, the energy storage device can receive electrical energy into their energy storage cell (charging) and electrical energy from their energy storage cell to a consumer deliver (discharge).
  • the number of contact elements of the energy storage device corresponds to the number of current conductors of the energy storage device.
  • the energy storage device comprises two current conductors each having a contact element connected thereto.
  • the contact elements of the energy storage device each have a first contact portion, which serves for the electrically conductive connection to a current conductor of the energy storage device.
  • This first contact portion is preferably plate-shaped.
  • the plate-shaped first contact section of the contact element preferably has a substantially constant thickness or material thickness.
  • the shape and size of the first contact section of the contact element are preferably adapted to those of the second contact section of the current conductor.
  • the contact elements of the energy storage device each have a second contact portion.
  • This second contact portion is preferably substantially cylindrical.
  • the second contact section serves as pole of the energy Storage device for electrically conductive connection with the environment of the energy storage device, for example, within a battery assembly.
  • the first contact portion and the second contact portion of the contact element are preferably integrally formed with each other.
  • first and the second contact portion of the contact element can also be manufactured as separate components and be electrically conductively connected to each other.
  • the first contact portion of the contact element is preferably at least partially disposed within the above-mentioned housing of the energy storage device.
  • the second contact section of the contact element is preferably arranged at least partially outside the above-mentioned housing of the energy storage device.
  • the first and the second contact portion of the current collector are according to the invention substantially parallel to each other.
  • This parallel alignment of the contact portions of the current collector relates to the finished manufactured and assembled state of the energy storage device, but not to all phases during the manufacturing process.
  • the essentially parallel course should be understood to mean an exactly parallel alignment of the contact sections of the current conductor and also in an angle range up to about ⁇ 10 °, more preferably up to about ⁇ 5 °, contact sections of the current conductor.
  • this parallel arrangement of the contact sections of the current conductor should also preferably refer to the planes defined by their main expansion directions.
  • the two contact portions of the current collector are preferably integrally formed with each other. Alternatively, they can also be manufactured as separate components and electrically conductively connected to each other.
  • the first and the second contact section of the current conductor are preferably connected to one another directly or via a connecting section.
  • the first contact section and the second contact section of the current collector are preferably arranged at a distance from one another.
  • the intermediate space between the two parallel contact sections is preferably empty or filled with air.
  • an electrically insulating material may be arranged in the intermediate space between the essentially parallel contact sections of the current conductor.
  • the contact sections of the current conductor are arranged substantially without spacing from one another or contacting one another in a planar manner.
  • the first contact section of the current conductor or the entire current conductor is formed by protruding from the enclosure of the energy storage cell sections of electrodes of the electrode stack.
  • the first contact section and the second contact section of the current conductor are electrically conductively connected to one another via a connection section, which is bent in a substantially U-shaped manner.
  • the first contact section and the second contact section of the current conductor are electrically conductively connected to one another via a connecting section, which is eccentrically, preferably peripherally, with respect to the first contact section of the current conductor and / or with respect to a stacking direction of the electrode stack of the energy storage cell is arranged.
  • the second contact portion of the current conductor is welded to the first contact portion of the contact element, preferably welded with ultrasound.
  • the second contact portion of the current collector is welded to the first contact portion of the contact element substantially flat.
  • the second contact portion of the current conductor is welded together with a sacrificial sheet on the side facing away from the first contact portion of the contact element of the second contact portion of the current conductor with the first contact portion of the contact element.
  • the second contact section of the contact element is arranged substantially centrally of the first contact section of the contact element.
  • the arrangement of the second contact section of the contact element that is central relative to the first contact section enables a simple design and production of the contact element.
  • the central arrangement preferably relates to the plane perpendicular to the connection direction between the first contact section of the contact element and the second contact section of the current conductor.
  • the second contact portion of the contact element is formed and arranged substantially perpendicular to the second contact portion of the Stromableiters.
  • the invention also provides a battery arrangement with a plurality of energy storage devices according to the invention, the contact elements of which are electrically connected to one another.
  • the electrical connection of the contact Elements can be done either in the form of a parallel connection or a series connection.
  • the energy storage device according to the invention or the battery arrangement with a plurality of such energy storage devices is preferably used in a motor vehicle with an electric drive or a hybrid drive.
  • the invention furthermore relates to a method for producing an energy storage device, in which a current conductor, which has a first contact section electrically connected to an electrode stack of an energy storage cell and a second contact section projecting at least partially out of an enclosure of the energy storage cell, having a first contact section of a contact element for electrically contacting the energy storage device is electrically conductively connected.
  • the second contact section of the current conductor is aligned substantially perpendicular to the first contact section of the current conductor before and during connection to the first contact section of the contact element and is bent after connection to the first contact section of the contact element such that the first contact section and the second contact section of Stromableiters substantially parallel to each other.
  • This method can be used in particular for producing the above-described energy storage device according to the invention.
  • Advantages, definitions and preferred embodiments for this production method correspond to those in connection with the energy storage device according to the invention.
  • a compact connection of the contact elements to the current conductors of the energy storage device can be achieved in a simple manner.
  • the second contact portion of the current collector with the first contact portion of the contact element in electrically conductive manner can be relatively easily performed, since the connection region is easily accessible due to the substantially vertical orientation between the two contact portions of the current conductor.
  • the second contact section of the current conductor is bent with the first contact section of the contact element in such a way that the two contact sections of the current conductor run essentially parallel to one another and thus the compact design explained above in connection with the energy storage device according to the invention can be achieved.
  • the bending over of the interconnected contact sections of the current conductor and of the contact element means any type of deformation which involves a plastic, i. when permanent deformation or elastic deformation of a component causes.
  • this bending preferably only the current conductor or a part of the current collector is deformed.
  • in addition to the current conductor or a part of the current collector and the contact element or a part of the contact element can be deformed.
  • the substantially parallel orientation of the two contact sections of the current conductor resulting from the bending should correspond in this context to that which has been explained in more detail above in connection with the energy storage device according to the invention together with various preferred embodiments.
  • the second contact portion of the current collector is welded to the first contact portion of the contact element, preferably welded with ultrasound.
  • the second contact portion of the current collector is welded to the first contact portion of the contact element substantially flat.
  • the second contact portion of the current collector is welded together with a sacrificial sheet on the first contact portion of the contact element side facing away from the second contact portion of the current collector with the first contact portion of the contact element.
  • the second contact portion of the current collector and the first contact portion of the contact element are preferably substantially horizontally or substantially vertically aligned during welding.
  • FIG. 1 is a schematic perspective view of an energy storage device according to a preferred embodiment of the present invention
  • Fig. 2 is a schematic, enlarged side view of a compound of a
  • FIGS. 3A-C are schematic perspective views illustrating the manufacture of the energy storage device of FIG. 1 according to a preferred embodiment of the present invention.
  • Figs. 1 and 2 show parts of an electrochemical energy storage device.
  • the energy storage device has an electrochemical energy storage cell 10, which contains a flat electrode stack with a sheath in a conventional manner. A portion of the electrodes of the electrode stack is led out of the enclosure of the energy storage cell 10 upwards.
  • the electrode sections of the anodic electrodes led out of the sheath are electrically conductively connected to a first current conductor 12 and the electrode sections of the cathodic electrodes of the electrode stack led out of the sheath are electrically conductively connected to a second current conductor 12.
  • the two current conductors 12 and their further connections are essentially identical.
  • the current conductors 12 are arranged substantially centrally in the stacking direction or thickness direction of the energy storage cell 10 or of the electrode stack (right / left direction in FIG. 2).
  • the current conductors 12 each have a first contact section 12a, which is electrically conductively connected to anodic or cathodic electrodes of the electrode stack of the energy storage cell 10, for example soldered or welded or alternatively formed integrally therewith.
  • the current conductors 12 each have a second contact section 12b, which is electrically conductively connected to a contact element 14.
  • the first and the second contact portion 12a, 12b of the current collector 12 are aligned substantially parallel to each other (within an angular range of about ⁇ 5 °), as can be seen in particular in FIG.
  • the two contact portions 12a, 12b objected to each other, wherein the gap is left empty or could alternatively be filled with an electrically insulating material, and connected to each other via a connecting portion 12c.
  • the two contact portions 12a, 12b of the current collector 12 are approximately U-shaped.
  • the second contact portion 12b of the current collector 12 may also be referred to as the arrester lug.
  • the connecting portion 12c of the current collector 12 is in the region of the edge of the energy storage cell 10, ie, at the edge, with respect to the first contact portion 12a of the current collector 12 and also with respect to the stacking direction of the electrode stack of the energy storage cell 10 (right / left direction in FIG. 2) arranged.
  • the connecting section 12c may also be offset from the edge region of the energy storage cell 10 toward the center of the energy storage cell.
  • the two current conductors 12 of the energy storage device, which are connected to the electrode stack of the energy storage cell 10 are arranged asymmetrically with respect to one another. That is to say that the connecting sections 12c of the two current conductors 12 are located on the edge regions of the energy storage cell 10 facing away from one another.
  • the current collector 12 is integrally formed with its portions 12a-c of an electrically conductive material (e.g., metal).
  • an electrically conductive material e.g., metal
  • the contact element 14 is arranged relatively close to the energy storage cell 10. This leads to a compact and space-saving design of the energy storage device.
  • the second contact portion 12b of the current collector 12 is substantially plate-shaped and serves the electrically conductive connection with the already mentioned contact element 14, which serves as a pole of the energy storage device and is described in more detail below.
  • the arrangement of the energy storage cell 10 and current conductors 12 is enclosed by an electrically insulating, one- or multi-part insulating film 16, for example made of PET laterally and on the bottom side (bottom in Fig. 1).
  • the construction unit surrounded by this insulating film 16 is further accommodated in a housing (not shown) stabilizing the unit.
  • This housing has, for example, a cell cup that is deep-drawn or cold-extruded is and is formed of a metallic material. At the upper side of the cell cup this is sealed with a cell cover, wherein the cell lid is welded or soldered to the cell cup, for example. Through an opening in the cell lid, the contact elements 14 are led out of the energy storage device.
  • contact elements 14 are formed from an electrically conductive material, for example a metal.
  • an annular sealing element made of an electrically insulating material is disposed in the passage opening of the cell lid between the contact elements 14 and the cell lid.
  • a further insulating element made of an electrically insulating material can be provided below the cell lid.
  • the contact elements 14 each have a first contact portion 14a and a second contact portion 14b.
  • the first contact portion 14a of the contact element 14 is formed substantially plate-shaped and serves the mechanical and electrically conductive connection with the second contact portion 12b of the Stromableiters 12.
  • the second contact portion 14b of the contact element 14 is substantially cylindrical and serves as a pole of the energy storage device, for example (serial or parallel) interconnection with other energy storage devices of a battery assembly.
  • the first and second contact portions 14a, 14b of the contact element 14 are directly connected to one another or integrally / integrally formed with each other.
  • the first contact portion 14a of the contact element 14 is substantially planar welded to the second contact portion 12b of the current collector 12, as explained in more detail below.
  • the current conductors 12 are initially formed such that their two contact sections 12a, 12b are substantially perpendicular to one another. Either the electrode films are led out of the energy storage cell 10 and combined or a suitably prefabricated current conductor is connected to the electrode stack of the energy storage cell 10.
  • the second contact sections 12b of the current conductors 12 are then brought together in each case with a contact element 14 and a sacrificial sheet 18 on opposite sides of the second contact sections 12b (see FIGS. 3A, 3B). Subsequently, the second contact portions 12b of the current collector 12 are each welded to a first contact portion 14a of a contact element 14 and a sacrificial sheet 18 surface.
  • an ultrasonic welding apparatus As indicated in FIG. 3C, such an ultrasonic welding device has in particular a generator (not shown), which converts the mains voltage into high frequency, a converter (not shown), which transmits the high frequency power, for example by means of piezoelectric or magnetoelectric power. has a sonic effect 22, the sonotrode 22 itself and an anvil 24, which receives the workpieces 12, 14, 18 to be welded between them and the sonotrode 22 preferably with pressure , on.
  • the welding of the plate-shaped workpiece (part) e 12b, 14a, 18 is effected by a friction of the molecules, which is caused by mechanical vibrations, which are transmitted from the sonotrode 22 to the workpiece parts 12b, 14a, 18, which are joined together under pressure. This friction of the molecules generates heat, which in turn softens or melts the material of the workpieces.
  • the ultrasonic welding operation is carried out with substantially horizontally oriented welding device 22, 24. That is, the second contact portion 12 b of the current collector 12, the first contact portion 14 a of the contact element 14 and the sacrificial sheet 18 are respectively during welding essentially vertically aligned.
  • the second contact sections 12b of the current conductors 12 are bent together with the first contact sections 14a and the sacrificial sheets 18 welded thereto (see arrow in FIG two contact portions 12a, 12b of the current collector 12 each have the desired, substantially parallel orientation to each other, as explained above with reference to FIG. 2.

Abstract

L'invention concerne un dispositif accumulateur d'énergie électrochimique comportant : un élément accumulateur d'énergie (10) doté d'un empilage d'électrodes et d'une enveloppe ; au moins un dérivateur de courant (12) qui comporte un premier segment de contact (12a), relié de manière électriquement conductrice à l'empilage d'électrodes de l'élément accumulateur d'énergie (10), et un deuxième segment de contact (12b) disposé au moins en partie à l'extérieur de l'enveloppe de l'élément accumulateur d'énergie (10). Il est prévu en outre au moins un élément de contact (14) qui comporte un premier segment de contact (14a) relié de manière électriquement conductrice, de préférence soudé à plat par ultrasons, au deuxième segment de contact (12b) du dérivateur de courant (12) et un deuxième segment de contact (14b) servant à réaliser la mise en contact électrique du dispositif accumulateur d'énergie. Dans un premier temps, le premier segment de contact (12a) et le deuxième segment de contact (12b) du dérivateur de courant (12) sont orientés sensiblement de manière perpendiculaire l'un par rapport à l'autre et, après avoir été soudé au premier segment de contact (14a) de l'élément de contact (14), le deuxième segment de contact (12b) du dérivateur de courant (12) est replié de façon à se trouver sensiblement parallèle au premier segment de contact (12a) du dérivateur de courant (12).
EP12751258.0A 2011-08-17 2012-08-09 Dispositif accumulateur d'énergie et procédé de fabrication dudit dispositif accumulateur d'énergie Withdrawn EP2745338A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011110814A DE102011110814A1 (de) 2011-08-17 2011-08-17 Energiespeichervorrichtung und Verfahren zur Herstellung einer Energiespeichervorrichtung
PCT/EP2012/003413 WO2013023769A1 (fr) 2011-08-17 2012-08-09 Dispositif accumulateur d'énergie et procédé de fabrication dudit dispositif accumulateur d'énergie

Publications (1)

Publication Number Publication Date
EP2745338A1 true EP2745338A1 (fr) 2014-06-25

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EP12751258.0A Withdrawn EP2745338A1 (fr) 2011-08-17 2012-08-09 Dispositif accumulateur d'énergie et procédé de fabrication dudit dispositif accumulateur d'énergie

Country Status (6)

Country Link
EP (1) EP2745338A1 (fr)
JP (1) JP2014524646A (fr)
KR (1) KR20140048987A (fr)
CN (1) CN103891006A (fr)
DE (1) DE102011110814A1 (fr)
WO (1) WO2013023769A1 (fr)

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EP3098874A1 (fr) 2015-05-29 2016-11-30 Lithium Energy and Power GmbH & Co. KG Boîtier pour cellules électrochimiques, cellule électrochimique, et procede de fabrication de un boîtier pour cellules électrochimiques
DE102019105782A1 (de) * 2019-03-07 2020-09-10 Johnson Controls Autobatterie Gmbh & Co. Kgaa Versetzte Polbuchsen und Energiespeichersystem mit den gleichen

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JP3951526B2 (ja) * 1999-11-26 2007-08-01 松下電器産業株式会社 円筒型蓄電池
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JP4710049B2 (ja) * 2006-03-30 2011-06-29 日本ケミコン株式会社 電子部品及びその製造方法

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KR20140048987A (ko) 2014-04-24
DE102011110814A1 (de) 2013-02-21
CN103891006A (zh) 2014-06-25
WO2013023769A1 (fr) 2013-02-21
JP2014524646A (ja) 2014-09-22

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