Patents Assigned to Varta Microbattery GmbH
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Publication number: 20040110061Abstract: The invention includes a rechargeable galvanic element with at least one lithium-intercalating electrode and a sealed thin flexible casing having two metal or composite metal/plastic sheets joined to each other by an adhesive or sealing layer. Inside the element, a PTC element is connected in series into one of the terminal leads. The PTC element is embedded inside the cell or into the edge of the element in the region of an adhesive or a sealing layer and is provided with a plastic coating resistant to organic electrolytes.Type: ApplicationFiled: October 9, 2003Publication date: June 10, 2004Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Peter Haug, Peter Birke, Dejan Ilic, Rainer Hald, Thomas Woehrle
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Publication number: 20030232241Abstract: An electrochemical element has at least one lithium-intercalating electrode and a thin flexible housing composed of two metal sheets, which rest directly on the electrodes and are connected to one another in a sealing manner via an adhesive or sealing layer. At least one of the metal sheets is provided on the outside with a plastic layer, which increases the robustness and strength. An adhesion layer is arranged between the metal sheet and the plastic layer. The metal sheet is composed, for example, of copper. The plastic layer is composed, for example, of polyimide. The adhesion layer is based, for example, on rubber.Type: ApplicationFiled: June 9, 2003Publication date: December 18, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Thomas Woehrle, Peter Birke, Fatima Birke-Salam, Claudia Rathmann, Stefan Fuerst, Heinrich Stelzig, Dejan Ilic
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Publication number: 20030232244Abstract: 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.Type: ApplicationFiled: April 29, 2003Publication date: December 18, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Peter Birke, Fatima Birke-Salam, Thomas Woehrle, Peter Haug, Konrad Holl, Heinrich Stelzig, Dejan Ilic
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Publication number: 20030228517Abstract: An electrochemical element with thin electrodes in a housing formed from plastic sheets connected to one another. At least one of the plastic sheets is metallized in subareas on the side facing one of the electrodes. The metal layer forms an electrical contact with the electrode and forms an outer contact lug of the electrode. The plastic sheet may be a composite sheet with an inner metal sheet covered by a plastic sheet on both sides, and the metallization of the plastic sheet in the area outside the cell outline may be in the form of conductor tracks. In particular, the housing is formed from two plastic sheets which are sealed to one another and metallized on their side which points into the cell interior such that the metallization forms the electrical contact with the electrodes and forms the outer contact lugs of the electrodes and/or of the electrochemical element.Type: ApplicationFiled: April 29, 2003Publication date: December 11, 2003Applicant: VARTA Microbattery GmbH. a corporation of GermanyInventors: Konrad Holl, Alfons Joas, Horst Wagner, Dejan Ilic, Roland Mueller, Wolfgang Siefert
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Publication number: 20030228515Abstract: 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.Type: ApplicationFiled: June 4, 2003Publication date: December 11, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Thomas Woehrle, Winfried Gaugler, Wolf-Ulrich Barenthin, Heinrich Stelzig, Dejan Ilic
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Publication number: 20030213120Abstract: A method for producing a rechargeable button cell having a negative electrode composed of a lithium/indium alloy, a positive lithium/intercalating electrode and an organic electrolyte, a lithium layer and an indium layer are introduced into a negative housing half-section. The positive electrode material is introduced into a positive housing half-section. The two housing half-sections are beaded to form the button cell once the organic electrolyte has been added and a separator has been placed in between, with a seal being inserted between the housing half-sections. A lithium-indium alloy is formed from the lithium layer and the indium layer by storage or a subsequent charging/discharge cycle.Type: ApplicationFiled: April 28, 2003Publication date: November 20, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Konrad Holl, Arno Perner, Horst Wagner, Rolf Hennrich, Dejan Ilic
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Publication number: 20030211387Abstract: A galvanic element with an alkaline electrolyte and a zinc negative electrode, in a housing in the form of a button cell, where at least the outer surface of the cell's cap is coated with a Cu—Sn-alloy containing no nickel or with a Cu—Sn—Zn-alloy containing no nickel. The alloy contains about 20% to about 90% Cu, preferably about 50% to about 60% Cu, with the remainder being Sn, or about 50% to about 60% Cu and about 25% to about 35% Sn, with the remainder being Zn.Type: ApplicationFiled: March 26, 2003Publication date: November 13, 2003Applicant: VARTA Microbattery GmbH, a corporation of Germany, Am Leineufer 51,30419 Hannover, GermanyInventors: Eugen Braunger, Konrad Holl, Bernd Kreidler, Dejan Ilic
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Publication number: 20030205500Abstract: 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.Type: ApplicationFiled: March 13, 2003Publication date: November 6, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Herbert Schein, Torsten Schmerer, Asela Jayampathy, Helmut Hewelt, Heinrich Stelzig, Kuno Gross
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Publication number: 20030182793Abstract: Apparatus for forming flat galvanic elements, wherein a large number of flat cells are inserted next to one another in recesses in a holder, wherein the recesses have been adapted to suit the cross-section of the cells. Conductor tabs on the flat cells point in the same direction and are clamped between contacting springs in the form of plates arranged on holders. The contacting springs contact both sides of the conductor tabs and have contacting surfaces that are much wider than the conductor tabs.Type: ApplicationFiled: March 12, 2003Publication date: October 2, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Rainer Hald, Markus Zeberer, Thomas Haake, Dejan Ilic
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Publication number: 20030183552Abstract: A sales or storage packaging for button cells has a holder for several button cells arranged on a carrier and has at least the seller's designation arranged on the carrier in the form of an adhesive, transparent, printed label attached thereto.Type: ApplicationFiled: March 18, 2003Publication date: October 2, 2003Applicant: VARTA Microbattery GmbH, a corporation of GermanyInventors: Herbert Schein, Anja Krueger, Helmut Hewelt, Manfred Bradler, Heinrich Stelzig, Manfred Haegele
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Publication number: 20030154593Abstract: A method for manufacturing a galvanic element including forming individual cells including electrode films laminated to a separator, wherein at least one of the electrodes is a lithium intercalating electrode with a polymer matrix in which electrochemically active materials are finely dispersed, wherein the electrochemically active materials are insoluble in the polymer, verifying the function of the individual cells by measuring impedance of the individual cells, and introducing an organic electrolyte into the cells to form the element.Type: ApplicationFiled: February 20, 2003Publication date: August 21, 2003Applicant: Varta Microbattery GmbH, a corporation of GermanyInventors: Rainer Hald, Winfried Gaugler, Konrad Holl, Peter Haug, Thomas Woehrle, Peter Birke, Dejan Ilic
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Publication number: 20030118894Abstract: A thin, flat and flexible galvanic element, its metallic housing including a foil fabricated from a copper material having a copper content of at least about 95% by weight and a light-metal alloying additive, where the copper and alloying light metal differ in atomic number by at least 15, but no more than 26, and have melting points that differ by at least about 400° C., but no more than about 950° C., the alloying metal is monovalent to trivalent in compounds and modifies the face-centered cubic hard-sphere packing of the copper during alloying such that its mass density of about 8.94 g/cm3 is altered by at least about 0.03 g/cm3, and the foil has an adhesive coating on its side facing the interior of the housing.Type: ApplicationFiled: December 20, 2002Publication date: June 26, 2003Applicant: VARTA Microbattery GmbHInventors: Fatima Birke-Salam, Thomas Wohrle, Peter Birke, Konrad Holl, Stefan Furst, Heinrich Stelzig, Dejan IIic
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Publication number: 20030111384Abstract: 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.Type: ApplicationFiled: December 17, 2002Publication date: June 19, 2003Applicant: Varta Microbattery GmbHInventors: Herbert Schein, Anja Kruger, Helmut Hewelt, Manfred Hagele, Manfred Bradler, Heinrich Stelzig
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Publication number: 20030113637Abstract: 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, CH2 groups, and this electrode-separator assembly is initially impregnated with this electrolyte, then cut to size, and subsequently inserted into a housing.Type: ApplicationFiled: December 3, 2002Publication date: June 19, 2003Applicant: Varta Microbattery GmbHInventors: Fatima Birke-Salam, Peter Birke, Konrad Holl, Heinrich Stelzig, Dejan Illic
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Publication number: 20030072999Abstract: A method for manufacturing electrode-separator assemblies for galvanic elements includes hot-lamination at temperatures close to the melting point or softening point of at least a portion of the surface of an electrode or separator to a separator or electrode, respectively.Type: ApplicationFiled: October 10, 2002Publication date: April 17, 2003Applicant: Varta Microbattery GmbHInventors: Peter Birke, Fatima Birke-Salam, Konrad Holl, Peter Haug, Heinrich Stelzig, Dejan Ilic