EP2176903A1 - Elément individuel pour une batterie en vue d'une mise en contact électrique - Google Patents

Elément individuel pour une batterie en vue d'une mise en contact électrique

Info

Publication number
EP2176903A1
EP2176903A1 EP08785178A EP08785178A EP2176903A1 EP 2176903 A1 EP2176903 A1 EP 2176903A1 EP 08785178 A EP08785178 A EP 08785178A EP 08785178 A EP08785178 A EP 08785178A EP 2176903 A1 EP2176903 A1 EP 2176903A1
Authority
EP
European Patent Office
Prior art keywords
single cell
cell according
electrically
pole
cell
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Withdrawn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
EP08785178A
Other languages
German (de)
English (en)
Inventor
Jens Meintschel
Dirk Schröter
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler AG filed Critical Daimler AG
Publication of EP2176903A1 publication Critical patent/EP2176903A1/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Withdrawn legal-status Critical Current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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to a single cell of a battery having disposed within a cell housing electrodes, preferably electrode foils, wherein at each electrode a Stromabieiterfahne is electrically conductive, wherein at least electrodes of unequal polarity by a separator, preferably a Separatorfolie, are isolated from each other, the Stromabieiterfahne electrically is conductively connected to a pole, according to the preamble of claim 1, as used for example in power engineering and in this case in particular in the at least supporting battery-powered vehicle technology and is assumed to be known here.
  • single cells as known from DE 42 40 339 C1, which are designed as flat cells, are formed as electrode films coated with electrochemically active materials AIu and copper foils.
  • the electrode foils are combined to form an electrode stack, the individual electrode foils being separated from one another electrically and also spatially by a separator, preferably a foil.
  • a separator preferably a foil.
  • a Stromabieiterfahne is welded to the electrode foil, which is guided through the cell housing. Since the cell housing of a single cell is generally formed of metal, preferably of aluminum, the Stromabieiterfahen in the feedthrough area are inter alia electrically isolated.
  • the tightness of the cell housing in the lead-through area is very difficult and extremely complicated to produce. In particular, this problem relates to both the compressive strength and also the seal against moisture. So a moisture entry is to be considered as a difficult and extremely complicated to solve problem.
  • the invention has for its object to provide a single cell of a battery, in which the tightness of the cell case is improved and in which the production costs are reduced as possible.
  • the single cell of a battery comprises electrodes arranged within a cell housing, preferably electrode foils.
  • a Stromabieiterfahne is arranged electrically conductive at each electrode.
  • At least electrodes of unequal polarity are electrically isolated by a separator, preferably a Separatorfolie, wherein the Stromabieiterfahne is electrically connected to a pole.
  • each pole of the individual cell is electrically conductively connected to an electrically conductive region of an outer side of the cell housing and designed as a flag-like extension piece of the outer side as a so-called pole lug.
  • housing side walls in particular with paints and / or thin foils, are electrically insulated outside the pole lugs in order to increase handling safety.
  • a pole lug is monolithically connected to its associated region of the outside in question.
  • the pole lugs of a single cell are arranged on a single narrow side of the cell housing and in particular on opposite corner areas, the pole lugs projecting from this narrow side with the same orientation for easier accessibility.
  • the pole lugs expediently have a width measured in the direction of their common arrangement which is less than half, preferably less than one fifth and particularly preferably less than one tenth of the corresponding extent of the associated extension Narrow side is.
  • the associated Stromabieiterfahen an individual cell to a pole welded together and / or pressed.
  • these or the pole without elaborate sealing measures from the interior of the single cell outwards feasible.
  • the contacting takes place in particular by means of welding through a belonging outside to contact the electrode foils lying in the interior to the outside.
  • the current drain tap is an edge region of the respective electrode foil, which is guided outside the electrode stack formed, whereby a complex contacting of electrode foil and Stromabieiterfahne deleted.
  • this type of contacting is very safe against at least many, in particular external influences such as shocks and vibrations.
  • an edge-surrounding and electrically insulating frame is arranged between two electrically conductive flat sides of the cell housing, which has two electrically isolated from each other and spaced material returns.
  • the Stromabieiterfahen each one polarity are arranged.
  • the measured in the direction of the stacking of the electrodes clear height of a material withdrawal is less than or equal to the corresponding extent of the unaffected stacked associated Stromabieiterfahen and their parallel to the flat side of an electrode film measured depth greater than or equal to the corresponding extent of the associated Stromabieiterfahen.
  • the Stromabieiterfahen be held securely in the material returns and can be pressed in particular tight connection between the frame and outer / flat sides electrically conductive with these.
  • the electrical connection between the cell housing and "+" or "-" pole at the electrode stack only during and especially after the assembly of the cell housing and that from the outside by a welding and / or pressing method, in a preferred manner produced by means of a laser beam welding process.
  • the housing wall of relevant outer side and further in the depth of the Stromabieiterfahen the electrode stack partially fusible, whereby a cohesive connection can be produced.
  • a weld seam in the direction of the stacking of the electrodes when viewed in the direction of the stacking of the electrodes, encompasses all of the current drainage lugs or passes through them.
  • a weld seam in the direction of the stacking of the electrodes not only includes all the current drainage lugs but also the corresponding electrically conductive outer side of the cell housing of the single cell or passes through them.
  • connection of the corresponding flat side of the cell housing in particular an aluminum housing with copper foil as a pole, can be improved by inserting a foil from a filler material, for example nickel.
  • the poles are connected only with a final welding operation carried out on the corresponding outer sides, in particular flat sides of the cell housing.
  • the above result in a possible reduction of the space requirement by variable Maisticianspositionen, better contact cooling, a reduction of parts through multifunctional component design isolation / housing / electrical contact, etc., reduced rejects by a simple contact with the sealed cell housing.
  • the production of hermetically sealed cell housings is facilitated, among other things, the production of moisture-tight cell housings is connected.
  • FIG. 1 shows schematically a perspective view of a flat cell with flag-like elongated housing side walls
  • Fig. 2 shows schematically a plan view of a designed as a flat cell
  • Fig. 3 is a sectional view of the flat cell shown in Figure 2
  • FIG. 4 is a schematic perspective view of a cell network of interconnected single cells designed as flat cells.
  • FIG. 1 shows a single cell 1 designed as a flat cell.
  • the single cell 1 has a cell housing 2, which is formed, for example, of aluminum.
  • the cell housing 2 is formed from two outer surfaces 4 (also called housing plates or housing sides) which are arranged plane-parallel to one another and correspond to one another.
  • an electrode stack shown in Figure 3 is arranged.
  • the outer sides 4 of the cell housing 2 are connected to the electrode stack such that they are electrically conductive.
  • the two outer sides 4 of the cell case 2 are electrically isolated from each other and have a different polarity.
  • pole lug 3 On the outer sides 4 each a flag-like extension piece, a so-called pole lug 3 is formed for electrical contacting.
  • the pole lugs 3 are monolithically connected to the associated outer side 4 and protrude detached from the cell housing 2. In this case, the pole lugs 3 project in particular from the edge of the narrow side of the associated outer side 4.
  • the pole lugs 3 are arranged in a region of opposite corners of the cell housing 2 on the respective outer side 4.
  • the pole lugs 3 have a measured width of less than one-tenth of the corresponding outer side 4. Also, the pole lugs 3 may have another suitable, measured in the direction of their common arrangement width, which is in particular less than half, preferably less than one fifth of the corresponding extent of the associated outer side 4.
  • the arranged pole lugs 3, one plus and one negative pole, serve to guide contact elements for removing the electrical voltage generated by the single cell 1.
  • the electrically conductive outer sides 4, in particular flat sides, are separated from one another by means of a frame 5 which circumscribes the single cell 1 on the edge and in particular is electrically insulated from one another.
  • the peripherally encircling frame 5 is formed for example of plastic and has an electrically insulating property.
  • the electrically conductive outer sides 4 for safe handling outside the area of the pole lugs 3, for example, with a paint coating and / or plastic films to the outside electrically isolated.
  • FIG. 2 shows a top view of the single cell 1 according to FIG. 1 formed as a flat cell with pole lugs 3 formed on the electrically conductive outer sides 4.
  • FIG. 3 shows a sectional illustration of the plan view of the single cell 1 shown in FIG.
  • the individual cell 1 comprises electrodes 6 arranged inside the cell housing 2, in particular electrode foils, which are combined to form an electrode stack 7.
  • the electrodes 6 are effective as electrochemically Materials coated aluminum and / or copper foils and / or made of films of such an alloy.
  • Electrodes 6 of unequal polarity are separated by a separator 8, in particular a separator, electrically insulating from each other.
  • the separator 8 is designed, for example, as a plastic film, in particular an electrical insulating film.
  • a Stromabieiterfahne 9 is electrically conductive.
  • the respective Stromabieiterfahne 9 is designed as an outwardly guided edge region of the respective electrode 6.
  • the electrodes 6 are electrically welded via their Stromabieiterfahen 9 to a pole 10 and / or pressed.
  • a weld seam viewed in the direction of the electrode stack 7, comprises all the current drainage lugs 9 and passes through them.
  • the respective pole 10 is electrically conductively connected to a region of the outer side 4 of the cell housing 2. This area is designed as a flag-like extension of the outer side 4 and forms the pole lug 3.
  • the electrical contact is guided by means of welding and / or pressing the adjacent outer side 4 on the inside of the cell housing 2 lying electrodes 6 to the outside. If the electrical contacting is realized by means of through-welding, the weld comprises all Stromabieiterfahen 9 and their adjacent electrically conductive outer side 4 of the Einzellzelle. 1
  • the electrically insulating frame 5 has two material returns 5.1, which are electrically insulated from one another and are located opposite one another and at a distance from each other. In these material returns 5.1 the Stromabieiterfahen 9 each one polarity are arranged electrically isolated from each other.
  • the clear height h of the material returns 5.1 is designed so that it corresponds to the corresponding extent of the unaffected stacked associated Stromabieiterfahen 9 or less than this.
  • the depth t of the material reductions 5.1 corresponds to the corresponding extension of the Stromabieiterfahen 9 or is made larger than this.
  • the Stromabieiterfahen 9 are supported in the material returns 5.1 and can be pressed electrically conductive in particular tight connection between the frame 5 and the outside 4.
  • a welding process for.
  • the electrically conductive outer sides 4 and the Stromabieiterfahnen 9 of the electrode stack 7 are connected to each other. In this case, the outer sides 4 and the electrode stack 7 are partially fused together.
  • FIG. 4 shows a cell network 11 interconnected with individual cells 1 designed as flat cells.
  • the individual cells 1 are arranged plane-parallel next to each other, wherein outer sides 4 of the respective cell housing 2 of the individual cells 1 adjoin one another with the same polarity.
  • the individual cells 1 are aligned such that their pole lugs 3 are arranged on a single longitudinal side 12 of the cell assembly 11. Also, the individual cells 1 may be aligned in a manner not shown in such a way that their pole lugs 3 protrude on opposite longitudinal sides of the cell assembly 11 of the respective cell housing 2.
  • the adjoining individual cells 1 are electrically connected to one another via their pole lugs 3.
  • the directly adjacent pole lugs 3 of the same polarity of two adjacent individual cells 1 by means of a spot welding process or other suitable welding or pressing process form and are firmly bonded together.
  • By such an electrical connection is an additional use of components such.
  • As conductor rails, cell connectors and / or cell connector boards avoided.
  • a pole lug 3 of the cell assembly 11 end or edge limiting single cells 1 is not electrically contacted.
  • These pole lugs 3 of different polarity are designed as connection points for the voltage removal of the voltage generated by the battery.

Abstract

L'invention concerne un élément individuel (1) pour une batterie avec des électrodes (6) disposées à l'intérieur d'un boîtier d'éléments (2), de préférence des films d'électrodes, un talon dérivateur de courant (9) étant disposé sur chaque électrode (6) de manière électroconductrice, au moins des électrodes (6) de polarité opposée étant séparées les unes des autres de façon à être isolées électriquement par un séparateur (8), de préférence sous forme d'un film. Des talons dérivateurs de courant (9) de même polarité sont reliés de manière électroconductrice à un pôle (10). Chaque pôle (10) est relié de manière électroconductrice à une zone électriquement conductrice d'une face externe (4) du boîtier d'éléments (2), les deux zones concernées de polarité différente étant isolées électriquement l'une de l'autre. Les talons de pôle (3) disposés sur les zones concernées se dressent librement au-dessus du boîtier d'éléments (2).
EP08785178A 2007-08-06 2008-07-29 Elément individuel pour une batterie en vue d'une mise en contact électrique Withdrawn EP2176903A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007036847 2007-08-06
DE102007063184A DE102007063184B4 (de) 2007-08-06 2007-12-20 Einzelzelle für eine Batterie zur elektrischen Kontaktierung
PCT/EP2008/006230 WO2009018943A1 (fr) 2007-08-06 2008-07-29 Elément individuel pour une batterie en vue d'une mise en contact électrique

Publications (1)

Publication Number Publication Date
EP2176903A1 true EP2176903A1 (fr) 2010-04-21

Family

ID=40279594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08785178A Withdrawn EP2176903A1 (fr) 2007-08-06 2008-07-29 Elément individuel pour une batterie en vue d'une mise en contact électrique

Country Status (6)

Country Link
US (1) US9012069B2 (fr)
EP (1) EP2176903A1 (fr)
JP (1) JP5576793B2 (fr)
CN (1) CN101772852B (fr)
DE (1) DE102007063184B4 (fr)
WO (1) WO2009018943A1 (fr)

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DE102009035491A1 (de) 2009-07-31 2011-02-03 Daimler Ag Batterieeinzelzelle mit einem Gehäuse
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DE102010012931A1 (de) 2010-03-26 2011-09-29 Daimler Ag Batterie mit einer Wärmeleitplatte zum Temperieren der Batterie
DE102010012935A1 (de) 2010-03-26 2011-09-29 Daimler Ag Batterie, insbesondere Fahrzeugbatterie
DE102010012938A1 (de) 2010-03-26 2011-09-29 Daimler Ag Einzelzelle für eine Batterie und Batterie mit einer Mehrzahl von Einzelzellen
DE102010012992A1 (de) 2010-03-26 2011-09-29 Daimler Ag Zellverbund mit einer vorgebbaren Anzahl von parallel und/oder seriell miteinander verschalteten Einzelzellen
DE102010013028A1 (de) 2010-03-26 2011-09-29 Daimler Ag Zellverbund mit einer vorgebbaren Anzahl von parallel und/oder seriell miteinander verschalteten Einzelzellen
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Also Published As

Publication number Publication date
WO2009018943A1 (fr) 2009-02-12
DE102007063184B4 (de) 2011-01-05
CN101772852B (zh) 2013-06-05
CN101772852A (zh) 2010-07-07
US9012069B2 (en) 2015-04-21
JP2010536129A (ja) 2010-11-25
DE102007063184A1 (de) 2009-02-19
JP5576793B2 (ja) 2014-08-20
US20100203379A1 (en) 2010-08-12

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