WO2014095167A2 - Battery cell with cell terminal designed as a socket and corresponding cell connector - Google Patents

Battery cell with cell terminal designed as a socket and corresponding cell connector Download PDF

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Publication number
WO2014095167A2
WO2014095167A2 PCT/EP2013/073693 EP2013073693W WO2014095167A2 WO 2014095167 A2 WO2014095167 A2 WO 2014095167A2 EP 2013073693 W EP2013073693 W EP 2013073693W WO 2014095167 A2 WO2014095167 A2 WO 2014095167A2
Authority
WO
WIPO (PCT)
Prior art keywords
cell
battery
terminal
contact
cell terminal
Prior art date
Application number
PCT/EP2013/073693
Other languages
German (de)
French (fr)
Other versions
WO2014095167A3 (en
Inventor
Wolfgang DUERNEGGER
Johannes BIEDERT
Original Assignee
Robert Bosch Gmbh
Samsung Sdi Co., Ltd.
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, Samsung Sdi Co., Ltd. filed Critical Robert Bosch Gmbh
Publication of WO2014095167A2 publication Critical patent/WO2014095167A2/en
Publication of WO2014095167A3 publication Critical patent/WO2014095167A3/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/288—Interconnections between 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/597—Protection against reversal of polarity
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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 invention relates to a battery cell having at least one negative electrode and at least one positive electrode, wherein the battery cell is surrounded by a cell housing and for electrically contacting the battery cell, a first cell terminal, which is electrically connected to the at least one negative electrode, and a second cell terminal which is electrically conductively connected to the at least one positive electrode.
  • the invention relates to a cell connector for electrically conductive contacting at least a first cell terminal of a first battery cell with at least one second cell terminal of a second battery cell, wherein the cell connector at least a first contact point for electrically conductive contacting a cell terminal and at least one second contact point for electrically conductive contacting a Cell terminals has.
  • the invention relates to a battery having at least two battery cells, which are electrically interconnected by means of cell connectors.
  • Batteries such as in particular designed as energy storage for the drive of hybrid, plug-in hybrid or electric vehicles batteries, usually include a plurality of battery cells, wherein the battery cells each have a have negative electrode and a positive electrode and are surrounded by a cell housing. For electrical contacting of the battery cells, these usually have a first cell terminal, which is electrically conductively connected to the negative electrode of the battery cell, and a second cell terminal, which is electrically conductively connected to the positive electrode of the battery cell.
  • cell connectors these battery cells are electrically interconnected via the cell terminals to form a battery module, wherein a plurality of battery modules are in turn connected via the cell terminals by means of cell connectors to form a battery or a battery pack.
  • the cell connectors and the cell terminals can be designed such that they can be screwed together, or that the cell connectors can be screwed onto the cell terminals. Screwing the cell connector with the cell terminals usually requires a high electrical contact resistance, which can increase even further over time, for example due to vibration and shock, which occur especially when using such battery cells in a vehicle. Moreover, the labor involved in screwing the cell connectors to the cell terminals is high. For electrically conductive connection of currently known battery cells with the lowest possible electrical transition and contact resistance, the cell connectors are therefore to be welded to the cell terminals. Welding the cell connectors with the cell terminals but limits the one hand, the available material combinations strong, on the other hand, it is not possible to solve by welding electrically interconnected interconnected battery cells non-destructively from each other again.
  • both a welding and screwing the battery cells with cell connectors has the disadvantage that this work on the Cell terminals of the respective battery cells are carried out, wherein at the cell terminals usually a voltage is applied, since the cell terminals are electrically conductively connected to an electrode of the battery cell.
  • the screwing or welding of the cell connectors with the cell terminals poses a risk potential.
  • a device for connecting arranged in a housing battery cells wherein the device comprises a female connector plate with a plurality of holes for receiving Stromableiterlaschen a battery cell and a connector plate.
  • Using the connector plate is an electrical interconnection of the battery cells.
  • a customized arrangement of any number of battery cells by the specification of the dimensions of the disclosed device is severely limited.
  • a battery cell with a first and a second cell terminal, wherein the cell terminal should be particularly suitable to be detachably connected to a cell connector with low transition and contact resistance, and thereby the potential for danger during manufacture to reduce such a connection.
  • a battery cell with at least one negative electrode and at least one positive electrode wherein the battery cell is surrounded by a cell housing and for electrically contacting the battery cell, a first cell terminal, which is electrically conductively connected to the at least one negative electrode, and a second cell terminal, which is electrically conductively connected to the at least one positive electrode, wherein the first cell terminal and / or the second cell terminal has a contact opening pointing into the cell housing.
  • the first cell terminal and / or the second Cell terminal is thus designed as a so-called female part of a plug connection, in particular in the manner of a socket.
  • the first cell terminal and / or the second cell terminal is advantageously fixedly installed in the cell housing or in the battery cell, such that an electrically conductive contacting of the first cell terminal and / or the second cell terminal by insertion of a correspondingly complementary to the respective cell terminal formed plug ,
  • the cell housing advantageously has at least one corresponding openings, so that a plug can be introduced into the contact opening of the respective cell terminal.
  • the battery cell is a lithium-ion cell.
  • the cell housing advantageously has a metallic portion or is made entirely of metal.
  • the battery cell has a cell structure with spiral winding of the electrodes.
  • the cell coils are advantageously electrically conductively connected in the interior of the cell housing with the corresponding cell terminals.
  • the cell coils are wound directly around the cell terminals.
  • the invention is based on the finding that the electrically conductive connection between battery cells can be simplified to a battery module or a battery by the connection is made by connectors. Contrary to the conventional arrangement of the cell terminals, which provides that a first cell terminal contacting the negative electrode of the battery cell and a second cell terminal contacting the positive electrode of the battery cell at least partially protrude from the cell housing surrounding the battery cell, a battery cell according to the invention is designed such that the first cell terminal Cell terminal and / or the second cell terminal, preferably the first cell terminal and the second cell terminal, are completely enclosed by the cell housing.
  • the first cell terminal and / or the second cell terminal is thus arranged within the battery cell, wherein the first cell terminal and / or the second cell terminal each having a contact opening, ie as so-called female part of a connector is formed.
  • the first cell terminal and / or the second cell terminal is advantageously arranged in the manner of a socket in or on the cell housing.
  • the arrangement of the first cell terminal and / or the second cell terminal within the cell housing quasi a kind of contact protection is provided with respect to the cell terminals, whereby the potential risk during transport of the battery cells and in particular when producing an electrically conductive connection between battery cells is advantageously reduced.
  • a type of short-circuit protection is realized by the arrangement of the cell terminals within the battery cell, since the risk of accidental contact of the first cell terminal with the second cell terminal, in particular with respect to protruding from the cell housing cell terminals, reduced.
  • an inventively provided electrically conductive contacting a battery cell by connecting cell terminals by means of corresponding contact plug the connection can be solved non-destructive again.
  • An advantageous embodiment of the invention provides that the first cell terminal and / or the second cell terminal is formed like a sleeve.
  • an electrically conductive contact by means of a connector advantageously further simplified.
  • the respective electrodes can be wound particularly simply directly around the respective cell terminal.
  • the first cell terminal and / or the second cell terminal extends from an outer wall of the cell housing into the cell housing, wherein the first cell terminal and / or the second cell terminal tapers.
  • the first cell terminal and / or the second cell terminal tapers conically or wedge-like.
  • the cell housing has a cell lid, wherein the first cell terminal and / or the second cell terminal is arranged on the cell lid.
  • the production of a battery cell according to the invention can be advantageously simplified.
  • the first cell terminal and / or the second cell terminal is cohesively arranged on the cell lid, preferably by soldering or welding.
  • a preferred embodiment of the battery cell according to the invention provides that the first cell terminal and the second cell terminal each have a pointing into the cell housing contact opening, the geometry of the contact opening of the first cell terminal deviates from the geometry of the contact opening of the second cell terminal.
  • the contact opening of one cell terminal for example of the first cell terminal, a round cross section and the contact opening of the other cell terminal, for example, the second cell terminal, an angular cross-section, preferably a rectangular cross-section on.
  • the first cell terminal and the second cell terminal are sleeve-like, wherein the cell terminal with the round contact opening is tube-like and the cell terminal is formed with the rectangular contact opening slit-like. Due to the different configuration of the contact openings or the cell terminals, the polarity of the corresponding cell terminals can be easily determined in accordance with a defined convention advantageously.
  • an angular cross-section may indicate the negative electrode of the battery cell and a round cross-section of the positive electrode.
  • a confusion protection of the polarities is provided, which is an accidental contact of a angular plug with a cell terminal with a round cross-section or accidentally contacting a round plug with a cell terminal with square cross section advantageously prevented and thus further reduces the risk of accidental short circuit.
  • a further advantageous embodiment of the invention provides that the battery cell has at least one means for securing a cell connector inserted in the first cell terminal and / or in the second cell terminal.
  • the backup takes place by means of a so-called snap-in technique.
  • the securing means may comprise a spring element which fixes an inserted cell connector.
  • a detent element is arranged as a mechanical detent for securing a cell connector inserted in a cell terminal as a means for securing to the cell housing, preferably in each case at a contact opening.
  • the means for securing advantageously causes a mechanical locking which, in particular also in the case of impacts and vibrations when using a battery cell according to the invention in vehicles, additionally prevents a mechanical separation of the contact surface of the cell terminal and the contact surface of the cell connector and thus contributes to the contact contact resistance remaining constant ,
  • a preferred embodiment of the battery cell according to the invention provides that the first cell terminal and the second cell terminal have a contact opening pointing into the cell housing.
  • a battery cell according to the invention comprises a cell terminal which has a pointing into the cell housing contact opening, and another cell terminal, which in a conventional manner protruding from the cell housing.
  • the present invention proposes an adapter element with a first region and a second region, wherein the first region is designed to be complementary to the contact opening of a battery cell according to the invention, preferably in the manner of a contact plug, and the second region according to Art a conventional cell terminal protruding from the cell housing is formed.
  • a cell connector for electrically conductive contacting at least a first cell terminal of a first battery cell is proposed with at least a second cell terminal of a second battery cell, the cell connector at least a first contact point for electrically conductive contacting a cell terminal and at least one second contact point for having electrically conductive contacting a cell terminal, wherein the at least one first contact point and / or the at least one second contact point is formed as a contact plug. Trained as a contact plug contacting the cell connector is thus the so-called male part of a connector.
  • the contacting points are preferably connected to one another via an electrically conductive connecting element, for example a metal strip.
  • the contacting of the cell connector according to the invention designed as a contact plug are advantageously arranged orthogonal to the connecting element.
  • the at least one first contacting point and / or the at least one second contacting point is designed to be complementary to the contact opening of a battery cell according to the invention.
  • the first contacting point and / or the second contacting point is in particular designed such that two battery cells according to the invention by means of a cell connector according to the invention in the manner of a connector electrically conductive can be connected to each other, preferably by the first contact point is inserted into the first cell terminal and the second contact point in the second cell terminal is plugged in.
  • a battery having at least two battery cells, which are electrically interconnected by means of cell connectors disclosed, wherein the battery cells according to the invention are battery cells and cell connectors according to the invention, and wherein the contact plug of the cell connectors are inserted into the contact opening of the respective cell terminals of the battery cells.
  • the battery cells according to the invention are battery cells and cell connectors according to the invention, and wherein the contact plug of the cell connectors are inserted into the contact opening of the respective cell terminals of the battery cells.
  • a battery can be easily changed in terms of sizing, by releasing connectors for a smaller dimensioning and further battery cells are connected by means of plug-in connections for greater sizing.
  • defective battery cells or defective battery modules of a battery can be easily exchanged since the battery cells or the battery modules are detachably connected in a non-destructive manner.
  • An advantageous embodiment of the battery according to the invention provides that the cell connectors are fixed in such a way that the contact plugs of the cell connectors are fixed in the contact openings of the cell terminal.
  • the fixing of the cell connectors preferably takes place in a material-locking, positive-locking and / or force-locking manner, particularly preferably singly or in combination by means of clip, screw, rivet and / or adhesive connection.
  • the cell connector has a fixing area for this purpose.
  • the cell housing of a battery cell can have a screw thread and the fixing region of the cell connector can have a throughbore so that the cell connector can be fixed by means of a screw to the cell housing of the battery cell.
  • the fixation further allows sealing of the cell terminal from external environmental influences, such as moisture or air. Moreover, separation of the contact surface of the cell connectors and the contact surface of the cell terminals is avoided so that the contact junction resistance from the cell terminal to the cell connector can advantageously be kept substantially constant. Further advantageous details, features and design details of the invention are explained in more detail in connection with the exemplary embodiments illustrated in the figures.
  • 1 shows a schematic representation of a plan view of an exemplary embodiment of a battery cell according to the invention
  • FIG. 2 is a schematic representation of part of a sectional view (section II-II) of the battery cell shown in Figure 1. in a schematic representation of a further embodiment of a battery cell according to the invention with a cell connector according to the invention; and FIG. 4 is a schematic representation of an exemplary embodiment of the connection of a plurality of battery cells according to the invention with cell connectors according to the invention to a battery cell according to the invention.
  • a battery cell 1 is shown in a plan view.
  • the battery cell 1 is surrounded by a cell housing 2 and may for example be a lithium ion cell.
  • the battery cell 1 has a negative electrode and a positive electrode (not explicitly shown in FIG. 1).
  • a first cell terminal 3 of the battery cell 1 is electrically conductively connected to the negative electrode.
  • a second cell terminal 4 is electrically conductively connected to the positive electrode.
  • the first cell terminal 3 and the second cell terminal 4 each have a contact opening 5, 6 protruding into the cell housing 2.
  • the contact opening 5 of the first cell terminal 3 has a rectangular cross section and the contact opening 6 of the second cell terminal 4 has a round cross section.
  • the geometry of the contact opening 5 of the first cell terminal 3 thus deviates from the geometry of the contact opening 6 of the second cell terminal 4.
  • the cell terminals 3 and 4 are each sleeve-like, ie in the manner of a socket, wherein the first cell terminal 3 is configured like a slit and the second cell terminal 4 tube-like, the Cell housing 2 of the battery cell 1 has a cell lid 8, on which the first cell terminal 3 and the second cell terminal 4 are arranged.
  • the cell terminals 3, 4 are tapered starting from the cell lid 8 in the direction of the interior of the battery cell (see FIG.
  • the cell cover 8 also has a safety vent 7.
  • the safety vent 7 is designed to allow the gas generated in the battery cell 1 to escape during thermal runaway (also referred to as "thermal runaway") of the battery cell 1.
  • thermal runaway also referred to as "thermal runaway
  • FIG. 2 shows a section II-II through the battery cell 1 shown in FIG
  • the cell terminal 3 is in this case materially connected to the cell cover 8 at the solder joints 11
  • Cell terminal 3 is mechanically locked in place by contact plug 5 (not shown in Fig. 2), as shown in Fig. 2.
  • contact plug 5 not shown in Fig. 2
  • the cell terminal 3 is sleeve-like and tapered the cell windings of the battery cell 1 connected (in Fig. 2 symbolically by the lines next to the metallic Wall 9 shown).
  • FIG. 3 shows a further exemplary embodiment of a battery cell 1 according to the invention, which is surrounded by a cell housing 2 and has a first cell terminal 3 and a second cell terminal 4.
  • the first cell terminal 3 has a contact opening 5 pointing into the cell housing 2.
  • FIG. 3 shows a cell connector 12 for the electrically conductive contacting of a first cell terminal 3 of a first battery cell 1 with at least one second cell terminal of a second battery cell (not shown in FIG. 3), the cell connector 12 having a first contacting point 13 for the electrically conductive cell Contacting a cell terminal 3 and a second contact point 14 for electrically conductive contacting a further cell terminal.
  • the first contacting point 13 is designed as a contact plug.
  • the contact plug 13 of the Cell connector 12 inserted into the cell terminal 3.
  • the contacting point 14 of the cell connector 12 is designed for contacting a cell terminal, which is designed like the second cell terminal 4 of the battery cell 1.
  • three battery cells 1 are shown, which are interconnected with cell connectors 12 to a battery 16.
  • the battery cells 1 each have a cell housing 2 with openings corresponding to the contact openings 5 and 6 of the cell terminals 3 and 4.
  • the contact openings 5 and 6 of the cell terminals 3 and 4 each have in the cell housing 2 and are formed like a sleeve.
  • the cell terminals 3, whose contact openings 5 each have a rectangular cross-section, are connected to the respective negative electrode of the respective battery cell 1.
  • the cell terminals 4, whose contact openings 6 each have a round cross-section, are connected to the respective positive electrode of the respective battery cell 1.
  • the battery cells 1 are connected to each other by cell connectors 12 to a battery 16.
  • a cell connector 12 has a first contacting position 13 formed as a contact plug and a second contacting point 14 designed as a contact plug.
  • the contact plug 13, 14 are connected via a connecting element 15, such as a metal strip, electrically conductively connected to each other, wherein the contact plug 13, 14 are arranged substantially orthogonal to the connecting element 15.
  • the contact plugs 13, 14 are each formed complementary to the respective contact opening 6, 5 or the respective cell terminals 4, 3.
  • the contact plug 13 of a cell connector 12 is formed in the manner of a round bolt and the contact plug 14 of a cell connector 12 in the manner of a contact strip. As indicated by the arrows 17 in FIG. 4, the contact plugs are plugged into the respectively matching cell terminals for the electrically conductive connection of the battery cells 1.
  • the inserted cell connectors can be fixed by gluing to the cell housing 2 such that the contact plugs 13, 14 of the cell connectors 12 are fixed in the contact openings 5, 6 of the cell terminals 3, 4.

Abstract

The present invention relates to a battery cell (1) with at least one negative electrode and at least one positive electrode, wherein the battery cell (1) is enclosed in a cell housing (2) and has, for electrical contacting of the battery cell (1), a first cell terminal (3) which is electrically connected to the at least one negative electrode, and a second cell terminal (4) which is electrically connected to the at least one positive electrode, wherein the first cell terminal (3) and/or the second cell terminal (4) has a contact opening (5, 6) pointing into the cell housing (2). The invention further relates to a cell connector (12) for making electrically conducting contact between at least a first cell terminal (3) of a first battery cell (1) and at least a second cell terminal (4) of a second battery cell (1), wherein the cell connector (12) has at least a first contact point (13) for making an electrically conducting contact with a cell terminal and at least a second contact point (14) for making an electrically conducting contact with a cell terminal and wherein the at least one first contact point (13) and/or the at least one second contact point (14) are designed as contact plugs. The invention further relates to a battery (16) with at least two battery cells (1) according to the invention, which are electrically connected together by means of cell connectors (12) according to the invention, wherein the contact plugs (13, 14) of the cell connectors (12) are plugged into the contact opening (5, 6) of the appropriate cell terminals (3, 4) of the battery cells (1).

Description

Beschreibung  description
Titel title
Batteriezelle mit buchsenartig ausgebildetem Zellterminal und korrespondierender Zellverbinder  Battery cell with receptacle-like cell terminal and corresponding cell connector
Die Erfindung betrifft eine Batteriezelle mit wenigstens einer negativen Elektrode und wenigstens einer positiven Elektrode, wobei die Batteriezelle von einem Zellgehäuse umgeben ist und zur elektrischen Kontaktierung der Batteriezelle ein erstes Zellterminal, welches mit der wenigstens einen negativen Elektrode elektrisch leitend verbunden ist, und ein zweites Zellterminal, welches mit der wenigstens einen positiven Elektrode elektrisch leitfähig verbunden ist, aufweist. The invention relates to a battery cell having at least one negative electrode and at least one positive electrode, wherein the battery cell is surrounded by a cell housing and for electrically contacting the battery cell, a first cell terminal, which is electrically connected to the at least one negative electrode, and a second cell terminal which is electrically conductively connected to the at least one positive electrode.
Darüber hinaus betrifft die Erfindung einen Zellverbinder zur elektrisch leitfähigen Kontaktierung wenigstens eines ersten Zellterminals einer ersten Batteriezelle mit wenigstens einem zweiten Zellterminal einer zweiten Batteriezelle, wobei der Zellverbinder wenigstens eine erste Kontaktierungsstelle zur elektrisch leitfähigen Kontaktierung eines Zellterminals und wenigstens eine zweite Kontaktierungsstelle zur elektrisch leitfähigen Kontaktierung eines Zellterminals aufweist. In addition, the invention relates to a cell connector for electrically conductive contacting at least a first cell terminal of a first battery cell with at least one second cell terminal of a second battery cell, wherein the cell connector at least a first contact point for electrically conductive contacting a cell terminal and at least one second contact point for electrically conductive contacting a Cell terminals has.
Ferner betrifft die Erfindung eine Batterie mit wenigstens zwei Batteriezellen, welche mittels Zellverbinder elektrisch miteinander verschaltet sind. Stand der Technik Furthermore, the invention relates to a battery having at least two battery cells, which are electrically interconnected by means of cell connectors. State of the art
Batterien, wie insbesondere als Energiespeicher für den Antrieb von Hybrid-, Plug-In-Hybrid- oder Elektrofahrzeugen ausgebildete Batterien, umfassen üblicherweise mehrere Batteriezellen, wobei die Batteriezellen jeweils eine negative Elektrode und eine positive Elektrode aufweisen und von einem Zellgehäuse umgeben sind. Zur elektrischen Kontaktierung der Batteriezellen weisen diese üblicherweise ein erstes Zellterminal auf, welches mit der negativen Elektrode der Batteriezelle elektrisch leitend verbunden ist, und ein zweites Zellterminal, welches mit der positiven Elektrode der Batteriezelle elektrisch leitend verbunden ist. Mittels sogenannter Zellverbinder werden diese Batteriezellen über die Zellterminals elektrisch miteinander zu einem Batteriemodul verschaltet, wobei mehrere Batteriemodule über die Zellterminals mittels Zellverbindern wiederum zu einer Batterie beziehungsweise einem Batteriepack verschaltet werden. Batteries, such as in particular designed as energy storage for the drive of hybrid, plug-in hybrid or electric vehicles batteries, usually include a plurality of battery cells, wherein the battery cells each have a have negative electrode and a positive electrode and are surrounded by a cell housing. For electrical contacting of the battery cells, these usually have a first cell terminal, which is electrically conductively connected to the negative electrode of the battery cell, and a second cell terminal, which is electrically conductively connected to the positive electrode of the battery cell. By means of so-called cell connectors, these battery cells are electrically interconnected via the cell terminals to form a battery module, wherein a plurality of battery modules are in turn connected via the cell terminals by means of cell connectors to form a battery or a battery pack.
Bei der Verschaltung der Batteriezellen beziehungsweise der Batteriemodule liegt ein Schwerpunkt auf der Verbindung der Zellverbinder mit den Zellterminals. Hierzu sind unterschiedliche Verbindungsarten bekannt. Insbesondere können die Zellverbinder und die Zellterminals derart ausgestaltet sein, dass diese miteinander verschraubt werden können, oder dass die Zellverbinder auf die Zellterminals aufgeschraubt werden können. Ein Verschrauben der Zellverbinder mit den Zellterminals bedingt in der Regel einen hohen elektrischen Übergangswiderstand, der sich im Laufe der Zeit noch weiter erhöhen kann, beispielsweise aufgrund von Vibrationen und Stößen, die insbesondere beim Einsatz solcher Batteriezellen in einem Fahrzeug auftreten. Darüber hinaus ist der mit dem Verschrauben der Zellverbinder mit den Zellterminals verbundene Arbeitsaufwand hoch. Zum elektrisch leitfähigen Verbinden von derzeit bekannten Batteriezellen bei möglichst geringem elektrischen Übergangs- und Kontaktwiderstand sind die Zellverbinder mit den Zellterminals daher zu verschweißen. Ein Verschweißen der Zellverbinder mit den Zellterminals schränkt aber einerseits die verfügbaren Werkstoffkombinationen stark ein, zum anderen ist es nicht möglich, durch Verschweißen elektrisch leitfähig miteinander verbundene Batteriezellen zerstörungsfrei wieder voneinander zu lösen. When connecting the battery cells or the battery modules, a focus is on the connection of the cell connectors with the cell terminals. For this purpose, different types of connection are known. In particular, the cell connectors and the cell terminals can be designed such that they can be screwed together, or that the cell connectors can be screwed onto the cell terminals. Screwing the cell connector with the cell terminals usually requires a high electrical contact resistance, which can increase even further over time, for example due to vibration and shock, which occur especially when using such battery cells in a vehicle. Moreover, the labor involved in screwing the cell connectors to the cell terminals is high. For electrically conductive connection of currently known battery cells with the lowest possible electrical transition and contact resistance, the cell connectors are therefore to be welded to the cell terminals. Welding the cell connectors with the cell terminals but limits the one hand, the available material combinations strong, on the other hand, it is not possible to solve by welding electrically interconnected interconnected battery cells non-destructively from each other again.
Darüber hinaus weist sowohl ein Verschweißen als auch ein Verschrauben der Batteriezellen mit Zellverbindern den Nachteil auf, dass hierzu Arbeiten an den Zellterminals der jeweiligen Batteriezellen durchzuführen sind, wobei an den Zellterminals üblicherweise eine Spannung anliegt, da die Zellterminals mit einer Elektrode der Batteriezelle elektrisch leitfähig verbunden sind. Insofern birgt das Verschrauben beziehungsweise das Verschweißen der Zellverbinder mit den Zellterminals ein Gefahrenpotential. In addition, both a welding and screwing the battery cells with cell connectors has the disadvantage that this work on the Cell terminals of the respective battery cells are carried out, wherein at the cell terminals usually a voltage is applied, since the cell terminals are electrically conductively connected to an electrode of the battery cell. In this respect, the screwing or welding of the cell connectors with the cell terminals poses a risk potential.
Aus der Druckschrift DE 103 18 587 B4 ist zudem eine Vorrichtung zur Verbindung von in einem Gehäuse angeordneten Batteriezellen bekannt, wobei die Vorrichtung eine Buchsensteckverbindungsplatte mit einer Vielzahl von Löchern zur Aufnahme von Stromableiterlaschen einer Batteriezelle und eine Steckverbindungsplatte umfasst. Unter Nutzung der Steckverbindungsplatte erfolgt eine elektrische Verschaltung der Batteriezellen. Hierbei besteht insbesondere der Nachteil, dass eine kundenindividuelle Anordnung von einer beliebigen Anzahl von Batteriezellen durch die Vorgabe der Dimensionen der offenbarten Vorrichtung stark eingeschränkt ist. From the document DE 103 18 587 B4 a device for connecting arranged in a housing battery cells is also known, wherein the device comprises a female connector plate with a plurality of holes for receiving Stromableiterlaschen a battery cell and a connector plate. Using the connector plate is an electrical interconnection of the battery cells. In this case, there is the particular disadvantage that a customized arrangement of any number of battery cells by the specification of the dimensions of the disclosed device is severely limited.
Vor diesem Hintergrund ist es eine Aufgabe der vorliegenden Erfindung, eine Batteriezelle mit einem ersten und einem zweiten Zellterminal bereitzustellen, wobei das Zellterminal insbesondere geeignet sein soll, mit einem Zellverbinder bei geringem Übergangs- und Kontaktwiderstand lösbar verbunden zu werden, und dabei das Gefahrenpotential beim Herstellen einer solchen Verbindung zu reduzieren. Against this background, it is an object of the present invention to provide a battery cell with a first and a second cell terminal, wherein the cell terminal should be particularly suitable to be detachably connected to a cell connector with low transition and contact resistance, and thereby the potential for danger during manufacture to reduce such a connection.
Offenbarung der Erfindung Disclosure of the invention
Zur Lösung der Aufgabe wird eine Batteriezelle mit wenigstens einer negativen Elektrode und wenigstens einer positiven Elektrode vorgeschlagen, wobei die Batteriezelle von einem Zellgehäuse umgeben ist und zur elektrischen Kontaktierung der Batteriezelle ein erstes Zellterminal, welches mit der wenigstens einen negativen Elektrode elektrisch leitend verbunden ist, und ein zweites Zellterminal, welches mit der wenigstens einen positiven Elektrode elektrisch leitfähig verbunden ist, aufweist, wobei das erste Zellterminal und/oder das zweite Zellterminal eine in das Zellgehäuse weisende Kontaktöffnung aufweist. Das erste Zellterminal und/oder das zweite Zellterminal ist also als sogenannter weiblicher Teil einer Steckverbindung ausgebildet, insbesondere nach Art einer Buchse. Das erste Zellterminal und/oder das zweite Zellterminal ist dabei vorteilhafterweise fest in das Zellgehäuse beziehungsweise in die Batteriezelle eingebaut, derart, dass eine elektrisch leitfähige Kontaktierung des ersten Zellterminals und/oder des zweiten Zellterminals durch Einstecken eines entsprechend komplementär zu dem jeweiligen Zellterminal ausgebildeten Stecker erfolgt. Das Zellgehäuse weist dabei vorteilhafterweise wenigstens eine entsprechende Öffnungen auf, sodass ein Stecker in die Kontaktöffnung des jeweiligen Zellterminals eingebracht werden kann. Gemäß einer bevorzugten Ausgestaltung der Erfindung ist die Batteriezelle eine Lithium-Ionen-Zelle. Insbesondere um Schädigungen durch Feuchtigkeit an der Batteriezelle zu verhindern, weist das Zellgehäuse vorteilhafterweise einen metallischen Anteil auf oder ist vollständig aus Metall. Gemäß einer vorteilhaften Ausgestaltung der Erfindung weist die Batteriezelle einen Zellenaufbau mit spiralförmiger Wicklung der Elektroden auf. Die Zellwickel sind dabei vorteilhafterweise im Inneren des Zellgehäuses mit den entsprechenden Zellterminals elektrisch leitfähig verbunden. Gemäß einer vorteilhaften Ausgestaltungsvariante sind die Zellwickel direkt um die Zellterminals gewickelt. To solve the problem, a battery cell with at least one negative electrode and at least one positive electrode is proposed, wherein the battery cell is surrounded by a cell housing and for electrically contacting the battery cell, a first cell terminal, which is electrically conductively connected to the at least one negative electrode, and a second cell terminal, which is electrically conductively connected to the at least one positive electrode, wherein the first cell terminal and / or the second cell terminal has a contact opening pointing into the cell housing. The first cell terminal and / or the second Cell terminal is thus designed as a so-called female part of a plug connection, in particular in the manner of a socket. The first cell terminal and / or the second cell terminal is advantageously fixedly installed in the cell housing or in the battery cell, such that an electrically conductive contacting of the first cell terminal and / or the second cell terminal by insertion of a correspondingly complementary to the respective cell terminal formed plug , The cell housing advantageously has at least one corresponding openings, so that a plug can be introduced into the contact opening of the respective cell terminal. According to a preferred embodiment of the invention, the battery cell is a lithium-ion cell. In particular, in order to prevent moisture damage to the battery cell, the cell housing advantageously has a metallic portion or is made entirely of metal. According to an advantageous embodiment of the invention, the battery cell has a cell structure with spiral winding of the electrodes. The cell coils are advantageously electrically conductively connected in the interior of the cell housing with the corresponding cell terminals. According to an advantageous embodiment variant, the cell coils are wound directly around the cell terminals.
Der Erfindung liegt die Erkenntnis zugrunde, dass die elektrisch leitfähige Verbindung von Batteriezellen zu einem Batteriemodul oder einer Batterie vereinfacht werden kann, indem die Verbindung durch Steckverbindungen hergestellt wird. Entgegen der herkömmlichen Anordnung der Zellterminals, welche vorsieht, dass ein erstes die negative Elektrode der Batteriezelle kontaktierendes Zellterminal und ein zweites die positive Elektrode der Batteriezelle kontaktierendes Zellterminal zumindest teilweise aus dem die Batteriezelle umgebenden Zellgehäuse herausragen, ist eine erfindungsgemäße Batteriezelle derart ausgebildet, dass das erste Zellterminal und/oder das zweite Zellterminal, vorzugsweise das erste Zellterminal und das zweite Zellterminal, vollständig von dem Zellgehäuse umschlossen werden. Das erste Zellterminal und/oder das zweite Zellterminal ist also innerhalb der Batteriezelle angeordnet, wobei das erste Zellterminal und/oder das zweite Zellterminal jeweils eine Kontaktöffnung aufweist, also als sogenannter weiblicher Teil einer Steckverbindung ausgebildet ist. Das erste Zellterminal und/oder das zweite Zellterminal ist dabei vorteilhafterweise nach Art einer Buchse in beziehungsweise an dem Zellgehäuse angeordnet. Durch die Anordnung des ersten Zellterminals und/oder des zweiten Zellterminals innerhalb des Zellgehäuses ist quasi eine Art Berührschutz bezüglich der Zellterminals bereitgestellt, wodurch das Gefahrenpotential beim Transport der Batteriezellen sowie insbesondere beim Herstellen einer elektrisch leitfähigen Verbindung zwischen Batteriezellen vorteilhafterweise reduziert ist. Insbesondere wird durch die Anordnung der Zellterminals innerhalb der Batteriezelle eine Art Kurzschlusssicherung realisiert, da die Gefahr einer versehentlichen Kontaktierung des ersten Zellterminals mit dem zweiten Zellterminal, insbesondere gegenüber aus dem Zellgehäuse herausragenden Zellterminals, reduziert ist. Darüber hinaus lässt bei einer erfindungsgemäß vorgesehenen elektrisch leitfähigen Kontaktierung einer Batteriezelle durch Verbinden von Zellterminals mittels entsprechender Kontaktstecker die Verbindung zerstörungsfrei wieder lösen. The invention is based on the finding that the electrically conductive connection between battery cells can be simplified to a battery module or a battery by the connection is made by connectors. Contrary to the conventional arrangement of the cell terminals, which provides that a first cell terminal contacting the negative electrode of the battery cell and a second cell terminal contacting the positive electrode of the battery cell at least partially protrude from the cell housing surrounding the battery cell, a battery cell according to the invention is designed such that the first cell terminal Cell terminal and / or the second cell terminal, preferably the first cell terminal and the second cell terminal, are completely enclosed by the cell housing. The first cell terminal and / or the second cell terminal is thus arranged within the battery cell, wherein the first cell terminal and / or the second cell terminal each having a contact opening, ie as so-called female part of a connector is formed. The first cell terminal and / or the second cell terminal is advantageously arranged in the manner of a socket in or on the cell housing. The arrangement of the first cell terminal and / or the second cell terminal within the cell housing quasi a kind of contact protection is provided with respect to the cell terminals, whereby the potential risk during transport of the battery cells and in particular when producing an electrically conductive connection between battery cells is advantageously reduced. In particular, a type of short-circuit protection is realized by the arrangement of the cell terminals within the battery cell, since the risk of accidental contact of the first cell terminal with the second cell terminal, in particular with respect to protruding from the cell housing cell terminals, reduced. In addition, in an inventively provided electrically conductive contacting a battery cell by connecting cell terminals by means of corresponding contact plug the connection can be solved non-destructive again.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, dass das erste Zellterminal und/oder das zweite Zellterminal hülsenartig ausgebildet ist. Durch eine derartige Ausgestaltung ist eine elektrisch leitfähige Kontaktierung mittels einer Steckverbindung vorteilhafterweise weiter vereinfacht. Darüber hinaus können vorteilhafterweise bei Batteriezellen mit Zellwickel, also bei Batteriezellen, bei denen die Elektroden und der Separator gewickelt sind, die jeweiligen Elektroden besonders einfach direkt um das jeweilige Zellterminal gewickelt werden. An advantageous embodiment of the invention provides that the first cell terminal and / or the second cell terminal is formed like a sleeve. By such a configuration, an electrically conductive contact by means of a connector advantageously further simplified. In addition, in the case of battery cells with cell windings, that is to say in the case of battery cells in which the electrodes and the separator are wound, the respective electrodes can be wound particularly simply directly around the respective cell terminal.
Gemäß einer bevorzugten Weiterbildung dieser Ausgestaltung der Batteriezelle erstreckt sich das erste Zellterminal und/oder das zweite Zellterminal von einer äußeren Wandung des Zellgehäuses in das Zellgehäuse, wobei sich das erste Zellterminal und/oder das zweite Zellterminal verjüngt. Vorzugsweise verjüngt sich das erste Zellterminal und/oder das zweite Zellterminal konisch oder keilartig. Durch die Verjüngung des Zellterminals beziehungsweise der Zellterminals wird vorteilhafterweise eine Selbsthemmung eines korrespondierend zu der von dem jeweiligen Zellterminal ausgebildeten Öffnung ausgebildeten Steckkontaktes erzeugt. Somit wird vorteilhafterweise bei einer hergestellten elektrisch leitfähigen Verbindung der Kontaktübergangswiderstand weiter reduziert. Darüber hinaus wird vorteilhafterweise ein mechanisches Trennen der Kontaktflächen von Zellterminal und eingebrachtem Stecker vermieden. According to a preferred development of this embodiment of the battery cell, the first cell terminal and / or the second cell terminal extends from an outer wall of the cell housing into the cell housing, wherein the first cell terminal and / or the second cell terminal tapers. Preferably, the first cell terminal and / or the second cell terminal tapers conically or wedge-like. The rejuvenation of the cell terminal or of the cell terminals advantageously results in self-inhibition of an opening corresponding to the opening formed by the respective cell terminal trained plug contact generated. Thus, the contact contact resistance is advantageously further reduced in a manufactured electrically conductive connection. In addition, a mechanical separation of the contact surfaces of cell terminal and inserted plug is advantageously avoided.
Bei einer vorteilhaften Ausgestaltungsvariante der erfindungsgemäßen Batteriezelle weist das Zellgehäuse einen Zelldeckel auf, wobei das erste Zellterminal und/oder das zweite Zellterminal an dem Zelldeckel angeordnet ist. Hierdurch lässt sich die Herstellung einer erfindungsgemäßen Batteriezelle vorteilhafterweise vereinfachen. Insbesondere ist vorgesehen, dass das erste Zellterminal und/oder das zweite Zellterminal stoffschlüssig an dem Zelldeckel angeordnet ist, vorzugsweise durch Löten oder Schweißen. Eine bevorzugte Ausgestaltung der erfindungsgemäßen Batteriezelle sieht vor, dass das erste Zellterminal und das zweite Zellterminal jeweils eine in das Zellgehäuse weisende Kontaktöffnung aufweisen, wobei die Geometrie der Kontaktöffnung des ersten Zellterminals von der Geometrie der Kontaktöffnung des zweiten Zellterminals abweicht. So weist gemäß einer vorteilhaften Ausgestaltungsvariante die Kontaktöffnung des einen Zellterminals, beispielsweise des ersten Zellterminals, einen runden Querschnitt auf und die Kontaktöffnung des anderen Zellterminals, beispielsweise des zweiten Zellterminals, eine eckigen Querschnitt, vorzugsweise einen rechteckigen Querschnitt, auf. Vorteilhafterweise sind das erste Zellterminal und das zweite Zellterminal dabei hülsenartig ausgebildet, wobei das Zellterminal mit der runden Kontaktöffnung röhrenartig ausgebildet ist und das Zellterminal mit der rechteckigen Kontaktöffnung schlitzartig ausgebildet ist. Durch die unterschiedliche Ausgestaltung der Kontaktöffnungen beziehungsweise der Zellterminals ist bei entsprechend festgelegter Konvention vorteilhafterweise die Polarität der entsprechenden Zellterminals einfach bestimmbar. So kann beispielsweise ein eckiger Querschnitt auf die negative Elektrode der Batteriezelle hinweisen und ein runder Querschnitt auf die positive Elektrode. Insbesondere ist durch eine derartige Ausgestaltung ein Verwechslungsschutz der Polaritäten bereitgestellt, welches ein versehentliches Kontaktieren eines eckigen Steckers mit einem Zellterminal mit rundem Querschnitt beziehungsweise ein versehentliches Kontaktieren eines runden Steckers mit einem Zellterminal mit eckigem Querschnitt vorteilhafterweise verhindert und somit die Gefahr eines versehentlichen Kurzschlusses weiter reduziert. In an advantageous embodiment variant of the battery cell according to the invention, the cell housing has a cell lid, wherein the first cell terminal and / or the second cell terminal is arranged on the cell lid. As a result, the production of a battery cell according to the invention can be advantageously simplified. In particular, it is provided that the first cell terminal and / or the second cell terminal is cohesively arranged on the cell lid, preferably by soldering or welding. A preferred embodiment of the battery cell according to the invention provides that the first cell terminal and the second cell terminal each have a pointing into the cell housing contact opening, the geometry of the contact opening of the first cell terminal deviates from the geometry of the contact opening of the second cell terminal. Thus, according to an advantageous embodiment variant, the contact opening of one cell terminal, for example of the first cell terminal, a round cross section and the contact opening of the other cell terminal, for example, the second cell terminal, an angular cross-section, preferably a rectangular cross-section on. Advantageously, the first cell terminal and the second cell terminal are sleeve-like, wherein the cell terminal with the round contact opening is tube-like and the cell terminal is formed with the rectangular contact opening slit-like. Due to the different configuration of the contact openings or the cell terminals, the polarity of the corresponding cell terminals can be easily determined in accordance with a defined convention advantageously. For example, an angular cross-section may indicate the negative electrode of the battery cell and a round cross-section of the positive electrode. In particular, by such a configuration a confusion protection of the polarities is provided, which is an accidental contact of a angular plug with a cell terminal with a round cross-section or accidentally contacting a round plug with a cell terminal with square cross section advantageously prevented and thus further reduces the risk of accidental short circuit.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, dass die Batteriezelle wenigstens ein Mittel zur Sicherung eines in das erste Zellterminal und/oder eines in das zweite Zellterminal eingesteckten Zellverbinders aufweist. Vorteilhafterweise erfolgt die Sicherung mittels einer sogenannten Snap-In- Technik. Insbesondere kann das Mittel zur Sicherung ein Federelement umfassen, welches einen eingesteckten Zellverbinder fixiert. Eine weitere vorteilhafte Ausgestaltungsvariante sieht vor, dass ein Rastelement als mechanische Arretierung zur Sicherung eines in ein Zellterminal eingesteckten Zellverbinders als Mittel zur Sicherung an dem Zellgehäuse, vorzugsweise jeweils an einer Kontaktöffnung, angeordnet ist. Das Mittel zur Sicherung bewirkt vorteilhafterweise eine mechanische Arretierung, die, insbesondere auch bei Stößen und Vibrationen beim Einsatz einer erfindungsgemäßen Batteriezelle in Fahrzeugen, ein mechanisches Trennen der Kontaktfläche des Zellterminals und der Kontaktfläche des Zellverbinders zusätzlich verhindert und somit dazu beiträgt, dass der Kontaktübergangswiderstand konstant bleibt. A further advantageous embodiment of the invention provides that the battery cell has at least one means for securing a cell connector inserted in the first cell terminal and / or in the second cell terminal. Advantageously, the backup takes place by means of a so-called snap-in technique. In particular, the securing means may comprise a spring element which fixes an inserted cell connector. A further advantageous embodiment variant provides that a detent element is arranged as a mechanical detent for securing a cell connector inserted in a cell terminal as a means for securing to the cell housing, preferably in each case at a contact opening. The means for securing advantageously causes a mechanical locking which, in particular also in the case of impacts and vibrations when using a battery cell according to the invention in vehicles, additionally prevents a mechanical separation of the contact surface of the cell terminal and the contact surface of the cell connector and thus contributes to the contact contact resistance remaining constant ,
Eine bevorzugte Ausgestaltung der erfindungsgemäßen Batteriezelle sieht vor, dass das erste Zellterminal und das zweite Zellterminal eine in das Zellgehäuse weisende Kontaktöffnung aufweisen. Darüber hinaus ist aber insbesondere zur elektrisch leitfähigen Kontaktierung eines Batteriemoduls mit erfindungsgemäßen Batteriezelle mit einem Batteriemodul mit herkömmlichen Batteriezellen vorgesehen, dass eine erfindungsgemäße Batteriezelle ein Zellterminal aufweist, welches eine in das Zellgehäuse weisende Kontaktöffnung aufweist, und ein weiteres Zellterminal aufweist, welches nach herkömmlicher Art aus dem Zellgehäuse herausragt. Darüber hinaus wird mit der vorliegenden Erfindung ein Adapterelement mit einem ersten Bereich und einem zweiten Bereich vorgeschlagen, wobei der erste Bereich komplementär zu der Kontaktöffnung einer erfindungsgemäßen Batteriezelle ausgebildet ist, vorzugsweise nach Art eines Kontaktsteckers, und der zweite Bereich nach Art eines herkömmlichen aus dem Zellgehäuse herausragenden Zellterminals ausgebildet ist. Durch Einstecken eines solchen Adapterelementes in ein eine Kontaktöffnung aufweisendes Zellterminal einer erfindungsgemäßen Batteriezelle wird vorteilhafterweise die Möglichkeit bereitgestellt, eine erfindungsgemäße Batteriezelle auch mit herkömmlichen Batteriezelle zu verbinden, beispielsweise, indem der eingesteckte Adapter mittels eines Zellverbinders verschweißt wird. A preferred embodiment of the battery cell according to the invention provides that the first cell terminal and the second cell terminal have a contact opening pointing into the cell housing. In addition, however, in particular for the electrically conductive contacting of a battery module with battery cell according to the invention is provided with a battery module with conventional battery cells that a battery cell according to the invention comprises a cell terminal which has a pointing into the cell housing contact opening, and another cell terminal, which in a conventional manner protruding from the cell housing. In addition, the present invention proposes an adapter element with a first region and a second region, wherein the first region is designed to be complementary to the contact opening of a battery cell according to the invention, preferably in the manner of a contact plug, and the second region according to Art a conventional cell terminal protruding from the cell housing is formed. By inserting such an adapter element into a cell terminal having a contact opening of a battery cell according to the invention, it is advantageously possible to connect a battery cell according to the invention to a conventional battery cell, for example by welding the inserted adapter by means of a cell connector.
Zur Lösung der eingangs genannten Aufgabe wird ferner ein Zellverbinder zur elektrisch leitfähigen Kontaktierung wenigstens eines ersten Zellterminals einer ersten Batteriezelle mit wenigstens einem zweiten Zellterminal einer zweiten Batteriezelle vorgeschlagen, wobei der Zellverbinder wenigstens eine erste Kontaktierungsstelle zur elektrisch leitfähigen Kontaktierung eines Zellterminals und wenigstens eine zweite Kontaktierungsstelle zur elektrisch leitfähigen Kontaktierung eines Zellterminals aufweist, wobei die wenigstens eine erste Kontaktierungsstelle und/oder die wenigstens eine zweite Kontaktierungsstelle als Kontaktstecker ausgebildet ist. Die als Kontaktstecker ausgebildete Kontaktierungsstelle des Zellverbinders ist also der sogenannte männliche Teil einer Steckverbindung. Vorzugsweise sind die Kontaktierungsstellen über ein elektrisch leitfähiges Verbindungselement, beispielsweise einen Metallstreifen, miteinander verbunden. Insbesondere die als Kontaktstecker ausgebildeten Kontaktierungsstellen des erfindungsgemäßen Zellverbinders sind dabei vorteilhafterweise orthogonal zu dem Verbindungselement angeordnet. Vorteilhafterweise ist die wenigstens eine erste Kontaktierungsstelle und/oder die wenigstens eine zweite Kontaktierungsstelle komplementär zu der Kontaktöffnung einer erfindungsgemäßen Batteriezelle ausgebildet. Die erste Kontaktierungsstelle und/oder die zweite Kontaktierungsstelle ist dabei insbesondere derart ausgebildet, dass zwei erfindungsgemäße Batteriezellen mittels eines erfindungsgemäßen Zellverbinders nach Art einer Steckverbindung elektrisch leitfähig miteinander verbunden werden können, vorzugsweise indem die erste Kontaktierungsstelle in das erste Zellterminal eingesteckt wird und die zweite Kontaktierungsstelle in das zweite Zellterminal eingesteckt wird. Darüber hinaus wird eine Batterie mit wenigstens zwei Batteriezellen, welche mittels Zellverbinder elektrisch miteinander verschaltet sind, offenbart, wobei die Batteriezellen erfindungsgemäße Batteriezellen und die Zellverbinder erfindungsgemäße Zellverbinder sind, und wobei die Kontaktstecker der Zellverbinder in die Kontaktöffnung der jeweiligen Zellterminals der Batteriezellen eingesteckt sind. Vorteilhafterweise lässt sich eine solche Batterie einfach hinsichtlich der Dimensionierung ändern, indem für eine kleinere Dimensionierung Steckverbindungen gelöst werden und für eine größere Dimensionierung weitere Batteriezellen mittels Steckverbindungen zugeschaltet werden. Vorteilhafterweise lassen sich zudem defekte Batteriezellen oder defekte Batteriemodule einer Batterie einfach austauschen, da die Batteriezellen beziehungsweise die Batteriemodule zerstörungsfrei lösbar verbunden sind. To solve the object mentioned above, a cell connector for electrically conductive contacting at least a first cell terminal of a first battery cell is proposed with at least a second cell terminal of a second battery cell, the cell connector at least a first contact point for electrically conductive contacting a cell terminal and at least one second contact point for having electrically conductive contacting a cell terminal, wherein the at least one first contact point and / or the at least one second contact point is formed as a contact plug. Trained as a contact plug contacting the cell connector is thus the so-called male part of a connector. The contacting points are preferably connected to one another via an electrically conductive connecting element, for example a metal strip. In particular, the contacting of the cell connector according to the invention designed as a contact plug are advantageously arranged orthogonal to the connecting element. Advantageously, the at least one first contacting point and / or the at least one second contacting point is designed to be complementary to the contact opening of a battery cell according to the invention. The first contacting point and / or the second contacting point is in particular designed such that two battery cells according to the invention by means of a cell connector according to the invention in the manner of a connector electrically conductive can be connected to each other, preferably by the first contact point is inserted into the first cell terminal and the second contact point in the second cell terminal is plugged in. In addition, a battery having at least two battery cells, which are electrically interconnected by means of cell connectors disclosed, wherein the battery cells according to the invention are battery cells and cell connectors according to the invention, and wherein the contact plug of the cell connectors are inserted into the contact opening of the respective cell terminals of the battery cells. Advantageously, such a battery can be easily changed in terms of sizing, by releasing connectors for a smaller dimensioning and further battery cells are connected by means of plug-in connections for greater sizing. Advantageously, moreover, defective battery cells or defective battery modules of a battery can be easily exchanged since the battery cells or the battery modules are detachably connected in a non-destructive manner.
Eine vorteilhafte Ausgestaltung der erfindungsgemäßen Batterie sieht vor, dass die Zellverbinder derart fixiert sind, dass die Kontaktstecker der Zellverbinder in den Kontaktöffnungen der Zellterminal fixiert sind. Vorzugsweise erfolgt das Fixieren der Zellverbinder stoffschlüssig, formschlüssig und/oder kraftschlüssig, besonderes bevorzugt einzeln oder in Kombination durch Clip-, Schraub-, Niet- und/oder Klebeverbindung. Vorteilhafterweise weist der Zellverbinder hierzu einen Fixierbereich auf. Insbesondere kann das Zellgehäuse einer Batteriezelle ein Schraubgewinde aufweisen und der Fixierbereich des Zellverbinders eine Durchbohrung aufweisen, sodass der Zellverbinder mittels einer Schraube an dem Zellgehäuse der Batteriezelle fixiert werden kann. Durch die Fixierung wird vorteilhafterweise ein Lösen der Steckverbindung vermieden. Vorteilhafterweise ermöglicht die Fixierung ferner ein Abdichten der Zellterminal vor äußeren Umwelteinflüssen, wie beispielsweise Feuchtigkeit oder Luft. Darüber hinaus wird eine Trennung der Kontaktfläche der Zellverbinder und der Kontaktfläche der Zellterminals vermieden, sodass der Kontaktübergangswiderstand von dem Zellterminal zu dem Zellverbinder vorteilhafterweise im Wesentlichen konstant gehalten werden kann. Weitere vorteilhafte Einzelheiten, Merkmale und Ausgestaltungsdetails der Erfindung werden im Zusammenhang mit den in den Figuren dargestellten Ausführungsbeispielen näher erläutert. Dabei zeigt: Fig.1 in einer schematischen Darstellung eine Draufsicht eines Ausführungsbeispiels für eine erfindungsgemäße Batteriezelle; An advantageous embodiment of the battery according to the invention provides that the cell connectors are fixed in such a way that the contact plugs of the cell connectors are fixed in the contact openings of the cell terminal. The fixing of the cell connectors preferably takes place in a material-locking, positive-locking and / or force-locking manner, particularly preferably singly or in combination by means of clip, screw, rivet and / or adhesive connection. Advantageously, the cell connector has a fixing area for this purpose. In particular, the cell housing of a battery cell can have a screw thread and the fixing region of the cell connector can have a throughbore so that the cell connector can be fixed by means of a screw to the cell housing of the battery cell. By fixing a release of the connector is advantageously avoided. Advantageously, the fixation further allows sealing of the cell terminal from external environmental influences, such as moisture or air. Moreover, separation of the contact surface of the cell connectors and the contact surface of the cell terminals is avoided so that the contact junction resistance from the cell terminal to the cell connector can advantageously be kept substantially constant. Further advantageous details, features and design details of the invention are explained in more detail in connection with the exemplary embodiments illustrated in the figures. 1 shows a schematic representation of a plan view of an exemplary embodiment of a battery cell according to the invention;
Fig. 2 in einer schematischen Darstellung einen Teil einer Schnittdarstellung (Schnitt II-II) der in Fig. 1 gezeigten Batteriezelle; in einer schematischen Darstellung ein weiteres Ausführungsbeispiel für eine erfindungsgemäße Batteriezelle mit einem erfindungsgemäßen Zellverbinder; und Fig. 4 in einer schematischen Darstellung ein Ausführungsbeispiel für die Verbindung mehrerer erfindungsgemäßer Batteriezellen mit erfindungsgemäßen Zellverbindern zu einer erfindungsgemäßen Batteriezelle. In Fig. 1 ist eine Batteriezelle 1 in einer Draufsicht dargestellt. Die Batteriezelle 1 ist von einem Zellgehäuse 2 umgeben und kann beispielsweise eine Lithium- lonen-Zelle sein. Die Batteriezelle 1 weist eine negative Elektrode und eine positive Elektrode auf (in Fig. 1 nicht explizit dargestellt). Ein erstes Zellterminal 3 der Batteriezelle 1 ist mit der negativen Elektrode elektrisch leitfähig verbunden. Ein zweites Zellterminal 4 ist mit der positiven Elektrode elektrisch leitfähig verbunden. Das erste Zellterminal 3 und das zweite Zellterminal 4 weisen jeweils eine in das Zellgehäuse 2 ragende Kontaktöffnung 5, 6 auf. Die Kontaktöffnung 5 des ersten Zellterminals 3 weist dabei einen rechteckigen Querschnitt auf und die Kontaktöffnung 6 des zweiten Zellterminals 4 weist einen runden Querschnitt auf. Die Geometrie der Kontaktöffnung 5 des ersten Zellterminals 3 weicht somit von der Geometrie der Kontaktöffnung 6 des zweiten Zellterminals 4 ab. Die Zellterminals 3 und 4 sind jeweils hülsenartig ausgebildet, d.h. nach Art einer Steckerbuchse, wobei das erste Zellterminal 3 schlitzartig ausgestaltet ist und das zweite Zellterminal 4 röhrenartig, das Zellgehäuse 2 der Batteriezelle 1 weist einen Zelldeckel 8 auf, an dem das erste Zellterminal 3 und das zweite Zellterminal 4 angeordnet sind. Die Zellterminals 3, 4 verjüngen sich dabei ausgehend von dem Zelldeckel 8 in Richtung des Inneren der Batteriezelle (vgl. Fig. 2). Der Zelldeckel 8 weist darüber hinaus eine Sicherheitsentlüftung 7 auf. Die Sicherheitsentlüftung 7 ist ausgebildet, bei einem thermischen Durchgehen (auch „thermal runaway" genannt) der Batteriezelle 1 das in der Batteriezelle 1 entstehende Gas entweichen zu lassen. Fig. 2 zeigt einen Schnitt II-II durch die in Fig. 1 dargestellte Batteriezelle 1. Gezeigt ist dabei ein Ausschnitt des Zelldeckels 8 sowie das an dem Zelldeckel 8 angeordnete Zellterminal 3. Das Zellterminal 3 ist dabei an den Lötstellen 1 1 mit dem Zelldeckel 8 stoffschlüssig verbunden. Der Zelldeckel 8 weist zudem ein Sicherungselement 10 auf, welches einen in das Zellterminal 3 durch die Kontaktöffnung 5 eingebrachten Kontaktstecker (in Fig. 2 nicht dargestellt) mechanisch arretiert. Wie aus Fig. 2 ersichtlich, ist das Zellterminal 3 hülsenartig und sich verjüngend ausgebildet. Das Zellterminal 3 beziehungsweise die metallische Wandung 9 des Zellterminals 3 ist vorliegend mit den Zellwickeln der Batteriezelle 1 verbunden (in Fig. 2 symbolisch durch die Linien neben der metallischen Wandung 9 dargestellt). Figure 2 is a schematic representation of part of a sectional view (section II-II) of the battery cell shown in Figure 1. in a schematic representation of a further embodiment of a battery cell according to the invention with a cell connector according to the invention; and FIG. 4 is a schematic representation of an exemplary embodiment of the connection of a plurality of battery cells according to the invention with cell connectors according to the invention to a battery cell according to the invention. In Fig. 1, a battery cell 1 is shown in a plan view. The battery cell 1 is surrounded by a cell housing 2 and may for example be a lithium ion cell. The battery cell 1 has a negative electrode and a positive electrode (not explicitly shown in FIG. 1). A first cell terminal 3 of the battery cell 1 is electrically conductively connected to the negative electrode. A second cell terminal 4 is electrically conductively connected to the positive electrode. The first cell terminal 3 and the second cell terminal 4 each have a contact opening 5, 6 protruding into the cell housing 2. The contact opening 5 of the first cell terminal 3 has a rectangular cross section and the contact opening 6 of the second cell terminal 4 has a round cross section. The geometry of the contact opening 5 of the first cell terminal 3 thus deviates from the geometry of the contact opening 6 of the second cell terminal 4. The cell terminals 3 and 4 are each sleeve-like, ie in the manner of a socket, wherein the first cell terminal 3 is configured like a slit and the second cell terminal 4 tube-like, the Cell housing 2 of the battery cell 1 has a cell lid 8, on which the first cell terminal 3 and the second cell terminal 4 are arranged. The cell terminals 3, 4 are tapered starting from the cell lid 8 in the direction of the interior of the battery cell (see FIG. The cell cover 8 also has a safety vent 7. The safety vent 7 is designed to allow the gas generated in the battery cell 1 to escape during thermal runaway (also referred to as "thermal runaway") of the battery cell 1. Fig. 2 shows a section II-II through the battery cell 1 shown in FIG The cell terminal 3 is in this case materially connected to the cell cover 8 at the solder joints 11 Cell terminal 3 is mechanically locked in place by contact plug 5 (not shown in Fig. 2), as shown in Fig. 2. As shown in Fig. 2, the cell terminal 3 is sleeve-like and tapered the cell windings of the battery cell 1 connected (in Fig. 2 symbolically by the lines next to the metallic Wall 9 shown).
Fig. 3 zeigt ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Batteriezelle 1 , welche von einem Zellgehäuse 2 umgeben ist und ein erstes Zellterminal 3 und ein zweites Zellterminal 4 aufweist. Das erste Zellterminal 3 weist eine in das Zellgehäuse 2 weisende Kontaktöffnung 5 auf. Ferner ist in Fig. 3 ein Zellverbinder 12 zur elektrisch leitfähigen Kontaktierung eines ersten Zellterminals 3 einer ersten Batteriezelle 1 mit wenigstens einem zweiten Zellterminal einer zweiten Batteriezelle (in Fig. 3 nicht dargestellt) dargestellt, wobei der Zellverbinder 12 eine erste Kontaktierungsstelle 13 zur elektrisch leitfähigen Kontaktierung eines Zellterminals 3 und eine zweite Kontaktierungsstelle 14 zur elektrisch leitfähigen Kontaktierung eines weiteren Zellterminals aufweist. Die erste Kontaktierungsstelle 13 ist dabei als Kontaktstecker ausgebildet. Zur elektrisch leitfähigen Kontaktierung des Zellverbinders 12 mit der Batteriezelle 1 wird der Kontaktstecker 13 des Zellverbinders 12 in das Zellterminal 3 eingesteckt. Die Kontaktierungsstelle 14 des Zellverbinders 12 ist zur Kontaktierung eines Zellterminals ausgebildet, welches wie das zweite Zellterminal 4 der Batteriezelle 1 ausgestaltet ist. In Fig. 4 sind drei Batteriezellen 1 dargestellt, welche mit Zellverbindern 12 zu einer Batterie 16 verschaltet werden. Die Batteriezellen 1 weisen jeweils ein Zellgehäuse 2 mit Öffnungen korrespondierend den Kontaktöffnungen 5 und 6 der Zellterminals 3 und 4 auf. Die Kontaktöffnungen 5 und 6 der Zellterminals 3 und 4 weisen jeweils in das Zellgehäuse 2 und sind hülsenartig ausgebildet. Die Zellterminals 3, deren Kontaktöffnungen 5 jeweils einen rechteckigen Querschnitt aufweisen, sind mit der jeweiligen negativen Elektrode der jeweiligen Batteriezelle 1 verbunden. Die Zellterminals 4, deren Kontaktöffnungen 6 jeweils einen runden Querschnitt aufweisen, sind mit der jeweiligen positiven Elektrode der jeweiligen Batteriezelle 1 verbunden. Die Batteriezellen 1 werden durch Zellverbinder 12 zu einer Batterie 16 miteinander verbunden. Dazu weist ein Zellverbinder 12 eine erste als Kontaktstecker ausgebildete Kontaktierungsstelle 13 und eine zweite als Kontaktstecker ausgebildete Kontaktierungsstelle 14 auf. Die Kontaktstecker 13, 14 sind dabei über ein Verbindungselement 15, beispielsweise einen Metallstreifen, elektrisch leitend miteinander verbunden, wobei die Kontaktstecker 13, 14 im Wesentlichen orthogonal zu dem Verbindungselement 15 angeordnet sind. Die Kontaktstecker 13, 14 sind jeweils komplementär zu der jeweiligen Kontaktöffnung 6, 5 beziehungsweise den jeweiligen Zellterminals 4, 3 ausgebildet. Das heißt, der Kontaktstecker 13 eines Zellverbinders 12 ist nach Art eines Rundbolzens ausgebildet und der Kontaktstecker 14 eines Zellverbinders 12 nach Art eines Kontaktstreifens. Wie in Fig. 4 durch die Pfeile 17 angedeutet, werden die Kontaktstecker in die jeweils passenden Zellterminals zum elektrisch leitfähigen Verbinden der Batteriezellen 1 eingesteckt. Die eingesteckten Zellverbinder können durch ein Verkleben mit dem Zellgehäuse 2 derart fixiert werden, dass die Kontaktstecker 13, 14 der Zellverbinder 12 in den Kontaktöffnungen 5, 6 der Zellterminals 3, 4 fixiert sind. Die in den Figuren dargestellten und im Zusammenhang mit diesen erläuterten Ausführungsbeispiele dienen der Erläuterung der Erfindung und sind für diese nicht beschränkend. FIG. 3 shows a further exemplary embodiment of a battery cell 1 according to the invention, which is surrounded by a cell housing 2 and has a first cell terminal 3 and a second cell terminal 4. The first cell terminal 3 has a contact opening 5 pointing into the cell housing 2. Furthermore, FIG. 3 shows a cell connector 12 for the electrically conductive contacting of a first cell terminal 3 of a first battery cell 1 with at least one second cell terminal of a second battery cell (not shown in FIG. 3), the cell connector 12 having a first contacting point 13 for the electrically conductive cell Contacting a cell terminal 3 and a second contact point 14 for electrically conductive contacting a further cell terminal. The first contacting point 13 is designed as a contact plug. For electrically conductive contacting of the cell connector 12 with the battery cell 1, the contact plug 13 of the Cell connector 12 inserted into the cell terminal 3. The contacting point 14 of the cell connector 12 is designed for contacting a cell terminal, which is designed like the second cell terminal 4 of the battery cell 1. In Fig. 4, three battery cells 1 are shown, which are interconnected with cell connectors 12 to a battery 16. The battery cells 1 each have a cell housing 2 with openings corresponding to the contact openings 5 and 6 of the cell terminals 3 and 4. The contact openings 5 and 6 of the cell terminals 3 and 4 each have in the cell housing 2 and are formed like a sleeve. The cell terminals 3, whose contact openings 5 each have a rectangular cross-section, are connected to the respective negative electrode of the respective battery cell 1. The cell terminals 4, whose contact openings 6 each have a round cross-section, are connected to the respective positive electrode of the respective battery cell 1. The battery cells 1 are connected to each other by cell connectors 12 to a battery 16. For this purpose, a cell connector 12 has a first contacting position 13 formed as a contact plug and a second contacting point 14 designed as a contact plug. The contact plug 13, 14 are connected via a connecting element 15, such as a metal strip, electrically conductively connected to each other, wherein the contact plug 13, 14 are arranged substantially orthogonal to the connecting element 15. The contact plugs 13, 14 are each formed complementary to the respective contact opening 6, 5 or the respective cell terminals 4, 3. That is, the contact plug 13 of a cell connector 12 is formed in the manner of a round bolt and the contact plug 14 of a cell connector 12 in the manner of a contact strip. As indicated by the arrows 17 in FIG. 4, the contact plugs are plugged into the respectively matching cell terminals for the electrically conductive connection of the battery cells 1. The inserted cell connectors can be fixed by gluing to the cell housing 2 such that the contact plugs 13, 14 of the cell connectors 12 are fixed in the contact openings 5, 6 of the cell terminals 3, 4. The exemplary embodiments illustrated in the figures and explained in connection therewith serve to explain the invention and are not restrictive of it.

Claims

Ansprüche claims
1 . Batteriezelle (1 ) mit wenigstens einer negativen Elektrode und wenigstens einer positiven Elektrode, wobei die Batteriezelle (1 ) von einem Zellgehäuse (2) umgeben ist und zur elektrischen Kontaktierung der Batteriezelle (1 ) ein erstes Zellterminal (3), welches mit der wenigstens einen negativen Elektrode elektrisch leitend verbunden ist, und ein zweites Zellterminal (4), welches mit der wenigstens einen positiven Elektrode elektrisch leitfähig verbunden ist, aufweist, dadurch gekennzeichnet, dass das erste Zellterminal (3) und/oder das zweite Zellterminal (4) eine in das Zellgehäuse (2) weisende Kontaktöffnung (5, 6) aufweist. 1 . Battery cell (1) having at least one negative electrode and at least one positive electrode, wherein the battery cell (1) of a cell housing (2) is surrounded and for electrically contacting the battery cell (1) a first cell terminal (3), which with the at least one a second cell terminal (4), which is electrically conductively connected to the at least one positive electrode, characterized in that the first cell terminal (3) and / or the second cell terminal (4) has a in the cell housing (2) facing contact opening (5, 6).
2. Batteriezelle (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass das erste Zellterminal (3) und/oder das zweite Zellterminal (4) hülsenartig ausgebildet ist. 2. Battery cell (1) according to claim 1, characterized in that the first cell terminal (3) and / or the second cell terminal (4) is sleeve-shaped.
3. Batteriezelle (1 ) nach Anspruch 2, dadurch gekennzeichnet, dass sich das erste Zellterminal (3) und/oder das zweite Zellterminal (4) von einer äußeren Wandung des Zellgehäuses (2) in das Zellgehäuse (2) erstreckt, wobei sich das erste Zellterminal (3) und/oder das zweite Zellterminal (4) verjüngt. 3. Battery cell (1) according to claim 2, characterized in that the first cell terminal (3) and / or the second cell terminal (4) extends from an outer wall of the cell housing (2) into the cell housing (2), wherein the first cell terminal (3) and / or the second cell terminal (4) tapers.
4. Batteriezelle (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Zellgehäuse (2) einen Zelldeckel (8) aufweist, wobei das erste Zellterminal (3) und/oder das zweite Zellterminal (4) an dem Zelldeckel (8) angeordnet ist. 4. battery cell (1) according to any one of the preceding claims, characterized in that the cell housing (2) has a cell cover (8), wherein the first cell terminal (3) and / or the second cell terminal (4) on the cell cover (8) is arranged.
5. Batteriezelle (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das erste Zellterminal (3) und das zweite Zellterminal (4) jeweils eine in das Zellgehäuse (2) weisende Kontaktöffnung (5, 6) aufweisen, wobei die Geometrie der Kontaktöffnung (5) des ersten Zellterminals (3) von der Geometrie der Kontaktöffnung (6) des zweiten Zellterminals (4) abweicht. 5. Battery cell (1) according to one of the preceding claims, characterized in that the first cell terminal (3) and the second cell terminal (4) each one in the cell housing (2) facing Contact opening (5, 6), wherein the geometry of the contact opening (5) of the first cell terminal (3) of the geometry of the contact opening (6) of the second cell terminal (4) deviates.
Batteriezelle (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Batteriezelle (1 ) wenigstens ein Mittel zur Sicherung eines in das erste Zellterminal (3) und/oder eines in das zweite Zellterminal (4) eingesteckten Zellverbinders (12) aufweist Battery cell (1) according to one of the preceding claims, characterized in that the battery cell (1) has at least one means for securing a in the first cell terminal (3) and / or in the second cell terminal (4) inserted cell connector (12)
Zellverbinder (12) zur elektrisch leitfähigen Kontaktierung wenigstens eines ersten Zellterminals (3) einer ersten Batteriezelle (1 ) mit wenigstens einem zweiten Zellterminal (4) einer zweiten Batteriezelle (1 ), wobei der Zellverbinder (12) wenigstens eine erste Kontaktierungsstelle (13) zur elektrisch leitfähigen Kontaktierung eines Zellterminals und wenigstens eine zweite Kontaktierungsstelle (14) zur elektrisch leitfähigen Kontaktierung eines Zellterminals aufweist, dadurch gekennzeichnet, dass die wenigstens eine erste Kontaktierungsstelle (13) und/oder die wenigstens eine zweite Kontaktierungsstelle (14) als Kontaktstecker ausgebildet ist. Cell connector (12) for electrically conductive contacting at least one first cell terminal (3) of a first battery cell (1) with at least one second cell terminal (4) of a second battery cell (1), wherein the cell connector (12) at least one first contacting point (13) electrically conductive contacting a cell terminal and at least one second contacting point (14) for electrically conductive contacting a cell terminal, characterized in that the at least one first contacting point (13) and / or the at least one second contacting point (14) is designed as a contact plug.
Zellverbinder (12) nach Anspruch 7, dadurch gekennzeichnet, dass die wenigstens eine erste Kontaktierungsstelle (13) und/oder die wenigstens eine zweite Kontaktierungsstelle (14) komplementär zu der Kontaktöffnung (5, 6) einer Batteriezelle (1 ) gemäß einem der Ansprüche 1 bis 6 ausgebildet ist. Cell connector (12) according to claim 7, characterized in that the at least one first contacting point (13) and / or the at least one second contacting point (14) complementary to the contact opening (5, 6) of a battery cell (1) according to one of claims 1 to 6 is formed.
Batterie (16) mit wenigstens zwei Batteriezellen (1 ), welche mittels Zellverbinder (12) elektrisch miteinander verschaltet sind, gekennzeichnet durch Batteriezellen (1 ) nach einem der Ansprüche 1 bis 6 und Zellverbinder (12) nach Anspruch 7 oder Anspruch 8, wobei die Kontaktstecker (13, 14) der Zellverbinder (12) in die Kontaktöffnung (5, 6) der jeweiligen Zellterminals (3, 4) der Batteriezellen (1 ) eingesteckt sind. Batterie (16) nach Anspruch 9, dadurch gekennzeichnet, dass die Zellverbinder (12) derart fixiert sind, dass die Kontaktstecker (13, 14) der Zellverbinder (12) in den Kontaktöffnungen (5, 6) der Zellterminals (3, 4) fixiert sind. Battery (16) having at least two battery cells (1), which are electrically interconnected by means of cell connectors (12), characterized by battery cells (1) according to one of claims 1 to 6 and cell connectors (12) according to claim 7 or claim 8, wherein the Contact plug (13, 14) of the cell connector (12) in the contact opening (5, 6) of the respective cell terminals (3, 4) of the battery cells (1) are inserted. Battery (16) according to claim 9, characterized in that the cell connectors (12) are fixed in such a way that the contact plugs (13, 14) of the cell connectors (12) are fixed in the contact openings (5, 6) of the cell terminals (3, 4) are.
PCT/EP2013/073693 2012-12-18 2013-11-13 Battery cell with cell terminal designed as a socket and corresponding cell connector WO2014095167A2 (en)

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CN108807759A (en) * 2018-06-11 2018-11-13 北京新能源汽车股份有限公司 A kind of power battery and electric vehicle
CN108807759B (en) * 2018-06-11 2021-04-27 北京新能源汽车股份有限公司 Power battery and electric automobile
DE102018211171A1 (en) 2018-07-06 2020-01-09 Bayerische Motoren Werke Aktiengesellschaft Battery device for a motor vehicle and motor vehicle with a battery device
WO2023184540A1 (en) * 2022-04-02 2023-10-05 宁德时代新能源科技股份有限公司 Battery cell, battery and electric device

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