Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/052—Li-accumulators
  • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L50/00—Electric propulsion with power supplied within the vehicle
  • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
  • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
  • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
• • 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
  • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
• • 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
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

• the present invention relates to an arrester foil for a negative electrode of a lithium ion accumulator having at least one lithium ion cell, a lithium ion accumulator and a motor vehicle with an electric drive motor for driving the motor vehicle and one connected to the electric drive motor or connectable lithium-ion battery.
• Lithium-ion cells have at least one positive and negative electrode (cathode or anode), the lithium-ion (Li +) reversible on (intercalation) or outsource (deintercalation) can.
• cathode or anode the lithium-ion (Li +) reversible on (intercalation) or outsource (deintercalation) can.
• Lithium-ion cell, lithium-ion polymer cell, lithium-ion cell, battery, accumulator and system are used largely synonymously.
• lithium-ion accumulators with regard to the gravimetric energy density (stated in Wh / kg) in order, for. B. allows to achieve high ranges of vehicles powered by electric motors.
• the nominal capacity of a lithium-ion cell is determined by the so-called active materials.
• so-called passive materials or “dead materials” are still present in each lithium-ion cell, which thus have an influence on the energy density of the lithium-ion cell, including, for example, electrical conductive material, electrode binders, separators, arrester films and the housing of the cell of the accumulator itself.
• Conductive foils serve to electrically contact and connect the positive and negative electrodes.
• Aluminum foil for contacting the positive electrode is usually used as the lead foil in lithium-ion cells.
• the negative electrode Aluminum foil for contacting the positive electrode is usually used as the lead foil in lithium-ion cells.
• copper foils are used on the electrode side, since the use of aluminum foils on the negative side would otherwise lead to the alloying of lithium and aluminum due to the given potential.
• aluminum foils having a thickness of about 13 to 17 ⁇ m and copper foils of about 12 ⁇ m are used as the conductor foil.
• the use of copper foil as a drain film results in higher
• the use of copper as the dissipation foil has a negative influence on the gravimetric energy density of the lithium-ion cell.
• a trap for lithium-polymer batteries is known, on which an electrically conductive primer layer is applied, which is free of carbon.
• the layer u. a. consist of metals which have improved compared to conventional carbon-containing primers conductivity.
• the arresters are preferably made of aluminum and copper, so that the disadvantages already described above in the use of copper as a conductor are given.
• an aluminum-based arrester foil for the negative electrode side of a lithium-ion cell is provided, which is provided on both sides with a metallic layer which during operation of the Lithium ion cell prevents an alloy with lithium ions.
• the metallic layer is made of copper or nickel.
• the edges of the arrester foil are also coated.
• an arrester foil is obtained, which is advantageously reduced in weight compared to the copper foils according to the prior art.
• arrester foil In the production of the arrester foil according to the invention, it is preferable not to use a conventional arrester foil made of aluminum for the positive side
• the copper layers can each be 1 ⁇ strong, so that the thickness of the aluminum core is 10 ⁇ .
• the outer layers should be as thin as possible.
• the aluminum core foil is thicker than the two outer layers together.
• the arrester foil according to the invention is assembled by applying a thin copper foil or layer to the aluminum foil on both sides.
• nickel can also be used for surface finishing. Applying the thin layers of copper or nickel on the
• Aluminum foil is preferably either
• the arrester foils according to the invention are in
• the arrester foils show the same electrical performance and identical behavior in long-term cyclization and storage as a reference cell with a conventional Abieiter made of copper.
• the present invention also provides a lithium ion accumulator equipped with this arrester foil with at least one
• FIG. 1 shows a sectional side view of an arrester foil according to the invention for the negative electrode of a lithium-ion cell.
• FIG. 1 shows the construction of an arrester foil 10 for a lithium-ion cell (not shown).
• the arrester foil 10 has a core of an aluminum foil 11, which is covered on both sides by a metallic layer 12.
• the metallic layers 12 prevent lithium alloy from alloying the aluminum foil during operation of the lithium-ion cell.
• the layer 12 is made of copper or nickel. Since a weight-optimized arrester foil 10 is to be obtained with the arrester foil 10 according to the invention, the dimensioning of the aluminum foil 11 and the two layers 12 is to be correspondingly dimensioned, that is to say the layers 12 are made as thin as possible.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Sustainable Development (AREA)
• Manufacturing & Machinery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Materials Engineering (AREA)
• Sustainable Energy (AREA)
• Power Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Cell Electrode Carriers And Collectors (AREA)
• Battery Electrode And Active Subsutance (AREA)
• Secondary Cells (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2010
  • 2010-12-10 DE DE102010062852A patent/DE102010062852A1/de not_active Withdrawn
• 2011
  • 2011-11-22 CN CN2011800594945A patent/CN103339759A/zh active Pending
  • 2011-11-22 EP EP11788118.5A patent/EP2649660A1/de not_active Ceased
  • 2011-11-22 WO PCT/EP2011/070644 patent/WO2012076327A1/de active Application Filing
  • 2011-11-22 US US13/992,448 patent/US20140015453A1/en not_active Abandoned

Patent Citations (1)

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