Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/04—Construction or manufacture in general
  • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/04—Construction or manufacture in general
  • H01M10/0436—Small-sized flat cells or batteries for portable equipment
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/058—Construction or manufacture
  • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/531—Electrode connections inside a battery casing
  • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• • 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
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49002—Electrical device making
  • Y10T29/49108—Electric battery cell making

Definitions

• the invention relates to a method for producing a single cell for a battery according to the preamble of claim 1.
• high-voltage batteries z.
• lithium-ion batteries known for vehicle applications, which are constructed in particular of several electrically connected in series and / or parallel single cells.
• the electrical contacts, d. H. a plus and a minus pole be placed directly on against each other electrically insulated parts of the housing.
• a single cell in particular a flat cell, for a battery with an electrode stack arranged within a cell housing.
• the cell housing has two housing side walls lying opposite one another and electrically insulating frames arranged between them.
• the electrical contacting of the electrode stack takes place directly to the opposite housing side walls, in particular flat sides, of the cell housing.
• the contacting takes place in a method for producing the individual cell, in particular by means of welding through a belonging outside in an assembled state of the single cell to contact the lying inside pole contacts of the electrode films to the outside.
• the invention is therefore based on the object, an improved method for producing a single cell.
• the cell housing is formed from two electrically conductive housing sidewalls and an interposed, peripherally circulating and electrically insulating frame. Stromabieiterfahen one polarity are combined in each case to a pole contact of the electrode stack and between the pole contacts and the housing side walls an electrically conductive connection is generated. According to the invention, the electrically conductive connection is produced in an opened state of the single cell.
• the open state is understood in particular to mean that the housing side walls are not fastened to the frame, wherein the electrode stack can be arranged in the frame.
• an additional insulating arrangement can advantageously be dispensed with.
• the handling of the single cell is made easier or safer.
• the inventive electrically conductive connection of the pole contacts with the housing side walls in the open state of the single cell there is the possibility of a subsequent control of the joint.
• by the proposed contacting the pole contacts of the electrode stack can be performed without elaborate sealing measures from the inside of the single cell to the outside.
• a pole contact is electrically conductively connected to a housing sidewall, resulting in less technical effort, since only the remaining pole contact after the arrangement of the electrode stack in the frame electrically connected to the associated housing side wall must become.
• both pole contacts can be electrically conductively connected to the housing side walls after the arrangement of the electrode stack.
• the generation of the electrically conductive connection of the pole contacts with the sides of the housing both before an arrangement and after an arrangement of the electrode stack in the frame can be done, in particular, in a welding process, wherein during the welding process one or multiple welds and / or welds are generated.
• the housing sidewall is further partially melted in the depth forming the pole contact Stromabieiterfahen the electrode stack, so that welded together with a weld and / or welding point all the pole contacts forming Stromabieiterfahen and the corresponding electrically conductive housing side wall in one step become.
• the resulting cohesive connection produces an electrically conductive connection with a low contact resistance, which has a high current-carrying capacity.
• the electrically conductive connection of the housing side walls and the pole contacts in a combined welding-press-joining method, for. B. an ultrasonic welding process can be generated.
• a reliable joining process is achieved on the one hand by the pressing and, on the other hand, a heat input into the electrode stack is avoided or at least reduced by the ultrasonic welding process.
• a separate film made of a filler material is introduced or applied to the sides of the housing side walls facing the pole contacts prior to the generation of the electrically conductive connection between the pole contacts and the housing side walls, so that the connection of the pole contacts to the housing side walls is improved.
• the electrode stack is formed from individual electrodes, preferably electrode foils, wherein the electrodes are separated from one another by a separator, preferably a separator foil.
• Electrode foil selected a copper and / or an aluminum foil or a film of such an alloy.
• an edge region of the respective electrode foil which is guided to the outside of the electrode stack, is used as the current drainage lug, whereby a complex contacting of electrode foil and current drainage lug is dispensed with.
• this type of contacting is very safe against at least many, especially external influences such as shock or vibration.
• two electrically isolated from each other and spaced-apart material returns are introduced into the frame, wherein in the material withdrawals Stromabieiterfahen the same polarity are inserted.
• the measured in the direction of the stacking of the electrodes clear height of a material withdrawal are smaller than or equal to the corresponding extent of the unaffected superimposed stacked associated Stromabieiterfahen and their measured parallel to the flat side of an electrode film depth greater than or equal to the corresponding extent of the associated Stromabieiterfahen.
• the housing side walls are fixed in a frictional, cohesive and / or form-fitting manner to the frame in an embodiment of the invention after the generation of the electrically conductive connection , so that then the single cell can be filled with an electrolyte.
• FIG. 2 schematically shows a device for carrying out a welding-press joining method
• FIG. 3 shows schematically a first perspective view of the opened single cell according to FIG. 1 and an arrangement of the device for carrying out the method of FIG Welding-press joining process during a welding process
• FIG. 4 schematically shows a second perspective view of the opened single cell according to FIG. 1 and an arrangement of the device for carrying out the welding-press-joining method during a welding process
• Fig. 5 schematically shows a perspective view of a
• Electrode stack during a welding operation to produce an electrically conductive connection with a housing side wall by means of a device for performing a welding press-joining method
• FIG. 6 is a schematic enlargement of a section of FIG. 5.
• FIG. 1 shows an individual cell 1 designed as a frame flat cell in an opened state.
• the individual cell 1 comprises an electrode stack 2 arranged in a cell housing, wherein the cell housing has two electrically conductive housing side walls 3, in particular flat sides, and a frame 4 which is arranged peripherally and runs around the edge and electrically insulating.
• the electrode stack 2 is formed, in particular, from electrode foils, not illustrated in detail, electrode foils being in a middle region of the electrode stack 2 different polarity, in particular aluminum and / or copper foils and / or films of a metal alloy, stacked on top of each other and electrically isolated from each other by means of a separator, not shown, in particular a Separatorfolie.
• the frame 4 which surrounds the edge of the electrode stack 2 has two mutually spaced, opposing material returns 4.1, which are designed so that the pole contacts P formed from the current discharge lugs 2.1 can be arranged in the material returns 4.1.
• the clear height of the material returns 4.1 is in particular designed so that it corresponds to the corresponding extent of the unaffected stacked Stromableiter- flags 2.1 or less than this.
• the depth of the material returns 4.1 corresponds to the corresponding extent of Stromabieiterfahen 2.1 or is designed to be larger than this.
• the pole contacts P of different polarity formed from the Stromabieiterfahen 2.1 are electrically isolated from each other, so that can be dispensed with in an advantageous manner to additional arrangements for electrical insulation.
• an electrically conductive connection of the pole contacts P and the housing side walls 3 in the shown opened state of the single cell 1 generates.
• the dargixie open state in particular represents a state in which the housing side walls 3 is not attached to the frame 4 and the electrode stack 2 is guided through the frame 4 and arranged in this.
• a material, positive and / or non-positive fastening of the housing side walls 3 to the frame 4 takes place in a manner not shown after the generation of the electrically conductive connection, for. B. by gluing and / or connecting elements in order to achieve a high stability of the connection between the housing side walls 3 and the frame 4.
• the connecting elements are in particular rivets, the frame at least peripherally embracing flag-like extensions of the housing side walls 3 and / or formed on the frame holding elements.
• the housing side walls 3 and / or the frame 4 preferably not shown in detail, corresponding to the respective connecting elements forms or recesses.
• FIG. 2 shows a welding device 5 for carrying out a welding-press-joining process.
• This welding device 5 is in particular an ultrasonic welding device which is formed from a sonotrode 5.1 and an anvil 5.2.
• the sonotrode 5.1 For welding the Stromabieiterfahen 2.1 to the pole contacts P and to a simultaneous welding of these with the housing side walls 3 resting on the insides of the housing side walls 3 Polumblee P and the housing side walls 3 between the sonotrode 5.1 and the anvil 5.2 and arranged by an introduced pressing force F P pressed.
• the sonotrode 5.1 generates a vibration S with a frequency in the ultrasonic range, so that the pole contacts P and the housing side walls 3 are moved against each other with great friction.
• a resulting large friction heat creates a non-illustrated weld or a welding point, not shown, so that a cohesive and electrically conductive Connection between the pole contacts P and the housing side walls 3 arises.
• a planar electrically conductive connection of the housing side walls 3 with the pole contacts P is achieved in particular by a plurality of welds and / or spot welds arranged in series and / or in parallel.
• the Stromabieiterfahen 2.1 are pressed in a separate process prior to the generation of electrical conductive connection with the housing side walls 3 to the pole contacts P and / or welded.
• a separate film, not shown, which z. B. made of nickel are introduced in order to achieve an improved connection between the pole contacts P and the housing side walls 3 during the welding process.
• this foil can also be applied to the sides of the housing side walls 3 facing the pole contacts P.
• an electrically insulating film not shown in detail between the pole contacts P and the housing side walls 3 or the housing side walls 3 on one side with an electrical insulating layer, so that an electrical contact of the pole contacts P with the housing side walls 3 only at the welding process arises.
• This insulating film or layer is preferably also used to protect the housing side walls 3 from corrosion, for example, caused by contact with the electrolyte located in the single cell 1.
• FIGS. 5 and 6 an advantageous embodiment of the invention is illustrated by means of a perspective view of the electrode stack 2 during a welding operation for the electrically conductive connection to a housing side wall 3 by means of the welding device 5 for carrying out the welding-press joining method.
• a pole contact P of the electrode stack 2 formed by the current discharge tabs 2.1 is electrically conductively connected to an associated cell side wall 3 that after the electrode stack 2 has been passed through the frame 4, only the remaining pole contact P has to be electrically conductively connected to the other cell sidewall 3.

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

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40668162

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Citations (3)

Family Cites Families (4)

• 2008
  • 2008-02-23 DE DE102008010810A patent/DE102008010810A1/de not_active Withdrawn
• 2009
  • 2009-02-19 EP EP09712006A patent/EP2243179B1/de not_active Not-in-force
  • 2009-02-19 US US12/918,598 patent/US20110035934A1/en not_active Abandoned
  • 2009-02-19 WO PCT/EP2009/001171 patent/WO2009103519A1/de not_active Ceased
  • 2009-02-19 JP JP2010547104A patent/JP2011513892A/ja active Pending
  • 2009-02-19 CN CN2009801047765A patent/CN101946345A/zh active Pending
  • 2009-02-19 AT AT09712006T patent/ATE540441T1/de active

Patent Citations (3)

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