Varta Microbattery Gmbh

Microbatterie Gmbh

Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg

Heinrich Stelzig

Dejan Ilic

Peter Birke

Konrad Holl

Fatima Birke-Salam

Herbert Schein

Helmut Hewelt

Winfried Gaugler

Michael Moser

Thomas Wöhrle

Peter Haug

Stefan Fürst

Dejan Illic

Manfred Bradler

Manfred Hägele

Anja Krüger

Kuno Gross

Asela Jayampathy

Torsten Schmerer

Ulrich Bosch

Claudia Rathmann

Wolf-Ulrich Barenthin

Dejan Llic

Alfons Joas

Konard Holl

A method for producing electrode sheets for electrochemical elements which contain at least one lithium-intercalating electrode which is composed of a mixture of at least two copolymerized fluorized polymers in whose polymer matrix electrochemically active materials which are insoluble in the polymer are finely dispersed, the fluorized polymers are, having being dissolved as a solvent, mixed with electrochemically active materials, the resulting pasty substance is extruded to form a sheet and then laminated with a polyolefin separator, which is provided with a mixture of the two polymers, PVDF-HFP copolymers in each case being used as the polymer, and the proportion of HFP being less than about 8 percent by weight.

Method for producing electrode sheets for electrochemical elements

A method for producing an electrochemical element having at least one lithium-intercollating electrode and an organic electrolyte, at least one positive electrode, at least one negative electrode and at least one separator are joined together to form an element, with the separator being a porous matrix composed of at least about 60% by weight of a ceramic material A, which contains lithium ions, and a polymer as a binding agent. The resulting element is then introduced into a housing and impregnated with a liquid organic electrolyte B, whose conductive salt contains lithium ions, so that the ionic total conductivity of the separator is formed by adding the ion conductivities of A and B and the reciprocal of the specific contact resistance of the phase boundary between A and B, and is then closed such that it is sealed. A copolymer composed of vinylidene fluoride and hexafluoropropylene is used as the binder polymer. Material A is a naturally occurring mineral.

Method for producing an electrochemical element

An electrochemical element which contains a stack including two or more individual cells with positive and negative electrodes as well as separators in a housing formed from a metal sheet which is coated on the inside with insulating material. The output conductor lugs of each polarity are welded to a collector. The collector forms an external electrical connection of the electrochemical element. Those areas of the output conductor lugs and the collector which are welded to them, point towards the housing internal wall and are adjacent to the housing wall and are covered with a plastic film. The plastic film is adhesively bonded to the output conductor and to the collector with a silicone adhesive layer and is composed, for example, of polyimide.

Electrochemical element

A thin electronic chip card with an IC chip and a galvanic element as an energy store, which has at least one lithium-intercalating electrode and has a thin, flexible housing comprising two metal foils, which bear directly against the electrodes and are connected to each other in a sealed manner with an adhesive or sealing layer, the element is arranged in a recess in the chip card and the chip card and the element are covered on both sides by an overlay plastic film, which is firmly bonded to the chip card and the element with an elastic stress-compensating adhesive, which adheres simultaneously on metals and plastics.

Thin electronic chip card and method of making same

A sales packaging for electric storage batteries having a backing and a cover fastened thereto. The storage battery has a connecting cable and a connector. The cover encloses the storage battery. The connecting cable and connector are brought out of the sales packaging and are accessible without damaging the cover. The connector is arranged in an opening in the backing, removable therefrom, and the opening is surrounded by slits.

Sales packaging for electric storage batteries

A packaging for galvanic cells including a carrier; a rotatable insert arranged on the carrier, wherein the rotatable insert has blisters to accommodate a plurality of the galvanic cells and the carrier has an opening to withdraw one of the cells from the insert; and a cover, arranged such that the insert is arranged between the carrier and the cover, the carrier and the cover being sealed together such that the insert is free to rotate, wherein the cover has an opening to accommodate the insert, and the carrier has a securable tab that allows withdrawal of one of the cells from the insert.

Sale and storage packaging for zinc-air cells

A method for manufacturing galvanic elements having a liquid organic electrolyte that contain an electrode-separator assembly that has at least one lithium intercalating electrode in whose polymer matrix insoluble, electrochemically active materials are finely distributed in the polymer involved, the electrolyte contains about 2% to about 15% by weight of a hydrocarbon-oxygen compound (carbonate) that has a central carbon atom, to which one oxygen atom is doubly bonded and two oxygen are singly bonded, where the singly bonded oxygen is not saturated by any other atoms or groups and a hydrocarbon chain having a length of four carbon atoms or less is bonded to each of those singly bonded oxygen atoms and these two chains differ by at least one, but no more than three, CH groups, and this electrode-separator assembly is initially impregnated with this electrolyte, then cut to size, and subsequently inserted into a housing. The electrode-separator assemblies may be laminated onto conductors and/or counterelectrodes prior to their being impregnated with the electrolyte and may also be rolled up and then impregnated.

Method for manufacturing galvanic elements having a liquid organic electrolyte

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Rosenberg, Germany

Heinrich Stelzig