Varta Microbattery GmbH Patent applications |
Patent application number | Title | Published |
20150236370 | BUTTON CELL WITH WINDING ELECTRODE - A button cell has a winding arranged in the cup-shaped, positive-polarity housing half such that one of the flat end sides points in the direction of the cup base, the circumferential outer side thereof bears against the circumferential cup wall and the outer side together with the cup wall forms a clamping zone in which the first current output conductor is clamped. | 08-20-2015 |
20140154561 | BUTTON CELL WITH A LARGE INTERNAL VOLUME - A button cell includes a sealed housing including a cup having a base, a circumferential sleeve, an intermediate region connecting the base and sleeve, and a cut edge, a cover having a base, a circumferential sleeve, and a cut edge, and a seal, wherein the cover is arranged with the cut edge in front into the cup, and the seal between the cup and cover is arranged such that it isolates them from each other, and wherein the sleeve of the cover is divided into a single-walled section and an adjoining circumferential double-walled opening edge with a U-shaped cross-section formed by bending the cut edge of the cover radially outwardly, the sleeve of the cover has a circumferential notch directly below the circumferential double-walled opening edge, in which its external diameter has a minimum value, and the sleeve of the cup has a circumferential protuberance formed by radial drawing-in. | 06-05-2014 |
20140106241 | ELECTROCHEMICAL CELL WITH A ZINC-INDIUM ELECTRODE - An electrochemical cell has an electrode which includes a zinc-indium alloy as electrochemically active material, wherein the alloy is present in the form of particles and the entirety of the particles is composed of at least two particle fractions differing in indium concentration. | 04-17-2014 |
20140106188 | ANODE MIXTURE, BUTTON CELL WITH AN ANODE COMPRISING METAL PARTICLES, AND PRODUCTION THEREOF - A method of producing a button cell having an anode including metal particles, including providing an anode mixture including as constituents metal particles, at least one binder, at least one conducting agent and, optionally, a gassing inhibitor, providing a button cell housing, introducing the mixture into the button cell housing, admixing the mixture with an electrolyte, and liquid-tight sealing of the housing, wherein the constituents of the mixture are contacted in the presence of water prior to introduction into the housing, and after the contacting the water is removed from the mixture at least partially. | 04-17-2014 |
20140103882 | EMERGENCY SYSTEM FOR POWER FAILURES - An emergency system for power failures includes a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, Ag | 04-17-2014 |
20140056327 | STATUS INDICATOR FOR TEMPERATURE-SENSITIVE GOODS - An apparatus that monitors temperature of temperature-sensitive goods includes a gas generation cell, an NTC thermistor, and an indicator device, wherein the gas generation cell, the NTC thermistor and the indication means are coupled to one another such that, when current flows through the NTC thermistor, a quantity of gas equivalent to a quantity of current flowing through the NTC thermistor is generated by the gas generation cell, and the indicator device changes its state and/or its position depending on the generated quantity of gas. | 02-27-2014 |
20140034485 | HYDROGEN EVOLUTION CELL HAVING A CATHODE POCKET - A hydrogen evolution cell which on passage of an electric current liberates an amount of hydrogen proportional to an amount of current flowing through, includes an electrochemically oxidizable anode, a hydrogen cathode, an electrolyte and a casing surrounding the same, wherein the hydrogen cathode is associated structure of at least one pocket defining a hollow space or defines a hollow space in the presence of hydrogen overpressure or wherein the cathode forms such a pocket. | 02-06-2014 |
20140030611 | METAL-AIR BUTTON CELLS AND THE PRODUCTION THEREOF - A method of producing a metal-air button cell including a housing, an air cathode, a metal-based anode and a separator arranged in the housing, the method including printing the air cathode in the form of a planar layer onto a planar substrate by a screen printing process, wherein a paste including a solvent and/or suspending agent, particles made of an electro-catalytically active material, and binder particles made of a hydrophobic plastic material is used for printing, and inserting the laminar composite structure obtained during printing and which includes the planar substrate and the air cathode applied thereto into the housing and combined with the metal-based anode, wherein the planar substrate, onto which the air cathode is printed, is the separator. | 01-30-2014 |
20130260700 | EMERGENCY SYSTEM FOR MOTOR VEHICLES - An emergency system for a motor vehicle having an onboard power supply system which triggers in an emergency a radio emergency call regardless of the state of the on-board power supply system of the motor vehicle, including a radio communication device that triggers the emergency call, a back-up battery including one or more electrochemical cells that supply the radio communication device with electric energy, and an electric heating device supplied with power by the on-board power supply system with which the back-up battery can be heated when its temperature is below or drops below a lower limit value, wherein the electric heating device is a heating foil including heating resistors laminated between electrically insulating foils and having a thickness <2 mm, and the heating foil is arranged in a substantially planar, two-dimensional contact to the electrochemical cell(s) of the battery. | 10-03-2013 |
20130236814 | HYDROGEN EVOLUTION DEVICE AND FUEL CELL SYSTEM COMPRISING THE SAME - A hydrogen evolution device that liberates hydrogen upon passage of an electric current, wherein an amount of liberated hydrogen is proportional to an amount of the current, includes at least one hydrogen evolution cell including an electrochemically oxidizable anode, a hydrogen cathode and an electrolyte, and at least one heating resistor thermally coupled to the hydrogen cathode directly or via a solid or liquid heat conductor. | 09-12-2013 |
20130230763 | HOUSING FOR MERCURY-FREE BUTTON CELLS - A method of producing a bowl-shaped housing half-part provided with a copper alloy interiorly of the housing of a mercury-free button cell includes (1) providing a clad material with a layer of nickel, a layer of copper and an intermediate layer of steel or high-grade steel, which is provided on a copper side with an additional coating including at least one metal selected from the group consisting of tin, zinc, indium and bismuth, (2) shaping a bowl-shaped housing half-part made of the clad material, wherein the layer of nickel forms an outside portion and the additional coating forms an inside portion of the bowl-shaped housing half-part, and (3) heat treating the housing half-part at a temperature where the at least one metal selected from the group consisting of tin, zinc, indium and bismuth is alloyed with the copper of the copper layer. | 09-05-2013 |
20130196222 | BUTTON CELL PROTECTED AGAINST SHORT CIRCUIT - A button cell with a housing includes a cup part and a cover part, which each have a floor region and a lateral surface region adjacent thereto and extending up to a first cut edge. A positive and a negative electrode, separated by a separator, are arranged in the housing. The cup part and the cover part are physically separated and electrically isolated from one another by a film seal, wherein the film seal surrounds the outer side of the cover part in the lateral surface region like a collar and is turned over the cut edge of the cover part inwardly. The film seal in this case forms, together with the separator and the cover part, a closed cavity in which the negative electrode is arranged. | 08-01-2013 |
20130183596 | METAL-AIR CELL HAVING HIGH CAPACITY - A zinc-air button cell comprising a zinc-containing anode and an air cathode as electrochemical active components and a casing surrounding the anode and the cathode and having 1 to 128 inlet openings through which atmospheric oxygen can enter the casing, wherein 1) the casing comprises a cell cup and a cell lid, 2) the inlet openings are introduced in a bottom portion of the cell cup, 3) at least a part of the inlet openings has an opening area of <0.025 mm | 07-18-2013 |
20130143104 | BUTTON CELL COMPRISING A COATED EXTERIOR - A button cell includes a housing including a cell cup and having an exterior electrically non-conductive coating, a cell cover and a seal which isolates the cell cup and the cell cover from one another. | 06-06-2013 |
20130130066 | BUTTON CELL COMPRISING A COIL ELECTRODE WITH A THERMAL FUSE - A button cell closed without flanging includes a housing formed of two housing halves including a cell cup and a cell lid, an electrically insulating seal separating the cell cup and the cell lid, an electrode-separator assembly including at least one positive and at least one negative electrode arranged inside the housing, metal diverters electrically connecting the at least one positive and the at least one negative electrode to the housing halves, and a thermal fuse connected to or integrated into one of the diverters. | 05-23-2013 |
20120202100 | THIN BATTERY WITH IMPROVED INTERNAL RESISTANCE - A battery includes a flat positive and a flat negative electrode separated by a gap, arranged alongside one another on a flat substrate and connected to one another via an ion-conducting electrolyte, wherein a ratio of thickness of at least one of the electrodes to a minimum width of the gap is 1:10 to 10:1. | 08-09-2012 |
20120164502 | GALVANIC ELEMENT AND SEPARATOR HAVING IMPROVED SAFETY PROPERTIES - A galvanic element has a positive electrode, a negative electrode and a separator lying in between, wherein the separator consists at least partially of a polymer of which the melting and/or softening temperature is >200° C. A multi-layer separator for galvanic elements, in particular for lithium-ion batteries, includes at least one layer of the polymer with a melting and/or softening temperature >200° C. | 06-28-2012 |
20120141865 | ELECTROCHEMICAL ELEMENT WITH A REDUCED INTERNAL RESISTANCE - An electrochemical element has a housing having an inside surface, a first electrode resting adjacent an inside surface of the housing and defining a cavity, the first electrode including at least two individual segments adjacent one another in a 2-dimensional manner via first contact surfaces and rest via further contact surfaces adjacent the inside surface, a second electrode of opposite polarity arranged inside the cavity, a separator arranged between the first and second electrodes, and at least one connector arranged between the first contact surfaces which connects the segments electrically conductively and which is annular or ring-shaped and includes at least one strip-shaped projection formed on an outside portion thereof | 06-07-2012 |
20120100406 | BUTTON CELL HAVING WINDING ELECTRODE AND METHOD FOR THE PRODUCTION THEREOF - A button cell includes a housing consisting of two metal housing halves, an electrode separator assembly in the form of a preferably spiral-shaped winding inside the housing, and metal conductors which electrically connect the electrodes of the assembly to the housing halves, wherein at least one of the conductors is connected to the respective housing half by welding. | 04-26-2012 |
20120080353 | RETAIL AND STORAGE PACK FOR ZINC-AIR BUTTON CELLS - A retail and storage pack of the blister card type for zinc-air button cells includes a support, and a transparent plastics film fixed thereon and has cup-shaped stamp-outs for reception of the button cells, wherein the pack is divided into single pack regions which can respectively be torn off separately and each of which respectively comprises at least one of the cup-shaped stamp-outs, and wherein the support is provided with an adhesive layer to which button cells received in the cup-shaped stamp-outs adhere by their base, which bases are provided with air inlet openings. | 04-05-2012 |
20120070739 | GALVANIC ELEMENT HAVING A MERCURY-FREE NEGATIVE ELECTRODE - A galvanic element includes a mercury-free negative electrode which consists essentially of a metal or a metal alloy and a nonmetallic conductive agent. A method for producing a galvanic element includes a mercury-free negative electrode produced from a powder of metal or metal alloy particles, surfaces of which are at least partially coated with a nonmetallic conductive agent. | 03-22-2012 |
20120064393 | BUTTON CELL AND METHOD FOR PRODUCTION THEREOF - A button cell has a multiple-part housing for holding electrodes and a separator, wherein there is an interlocking connection between the housing and at least one of the electrodes, in particular the anode. A method for producing button cells includes a step wherein an electrode material is introduced into a housing half-part, the inside of which has at least one recess provided with at least one undercut to create an interlocking connection between the resultant electrode and the housing half-part. | 03-15-2012 |
20120028110 | BUTTON CELL WITHOUT FLANGING AND METHOD OF MAKING SAME - A method for producing a button cell with a housing includes a cell cup with a base region, a lateral region, an edge region lying therebetween and a cut edge, and a cell cover with a cover region, a lateral region, an edge region lying therebetween and a cut edge, connected to one another via a seal. The method includes at least applying the seal to the lateral region, inserting the cell cover with the seal into the cell cup, wherein a region is formed in which the lateral regions and overlap one another, and exerting a pressure on the lateral region of the cell cup. The heights of the lateral regions and are matched to one another such that the cut edge is pressed against the lateral region by pressure. The cell cup of button cells have an inner radius which is essentially constant in the region in the direction of the cut edge. | 02-02-2012 |
20120015224 | BUTTON CELLS AND METHOD FOR PRODUCING SAME - A button cell includes a housing cup and a housing top separated from one another by an electrically insulating seal and which form a housing with a flat bottom area and a flat top area parallel to it and an electrode-separator assembly within the housing including at least one positive and at least one negative electrode in the form of flat layers and connected to one another by at least one flat separator, wherein the electrode layers are aligned essentially at right angles to the flat bottom and top areas and the button cell is closed without being beaded over. | 01-19-2012 |
20110309310 | ELECTRODE-ACTIVE MATERIAL FOR ELECTROCHEMICAL ELEMENTS - A process for producing active material for an electrode of an electrochemical element includes providing carbon particles, applying a silicon precursor to surfaces of the carbon particles, and thermally decomposing the silicon precursor to form metallic silicon. | 12-22-2011 |
20110268997 | BATTERY HAVING SIMPLIFIED DESIGN - A battery comprising a cell stack comprising at least one individual cell in a cell housing, an electronic component part, electrical conductors between the cell stack and the electronic component part and an injection-molded part which substantially completely surrounds the electrical conductors and is connected in form-fitting fashion both the cell stack and to the electronic component part and connects the cell stack and the electronic component part to one another, outer contact faces of the battery also being integrated in the electronic component part in addition to at least one electronic circuit. | 11-03-2011 |
20110200871 | ELECTROCHEMICAL CELL AND PROCESS FOR PRODUCING IT - A process for producing an electrochemical cell includes assembling a cell housing from a plurality of parts, and applying and curing at least one reactive polymer precursor to at least one of the housing parts to seal the housing. | 08-18-2011 |
20110159354 | GALVANIC ELEMENT WITH A HIGH CAPACITY - A button cell includes a positive electrode, a negative electrode and a separator arranged in a housing comprising a cell cup and a cell lid insulated from one another by a seal, wherein the negative electrode is tablet-shaped pressed body having a self-supporting structure. | 06-30-2011 |
20110086260 | THIN HOUSING FILM FOR ELECTROCHEMICAL ELEMENTS - A housing film for electrochemical elements includes a barrier layer having a polymeric structure which has been deposited from the gas phase on to a support layer, an electrochemical element which has at least one positive electrode and at least one negative electrode and has at least one such film. A process for producing the electrochemical element includes steps wherein at least two electrodes are applied next to one another on a substrate and are covered with a film, where the substrate and/or the film is such a housing film. | 04-14-2011 |
20110086253 | ELECTROCHEMICAL CELL WITH AN IRREVERSIBLE FUSE - A rechargeable electrochemical cell includes at least one lithium-intercalating electrode; a thin flexible housing, which is closed in a sealed manner, including two films connected to one another by an adhesive or sealing layer; and at least one current output conductor in which an irreversibly tripping thermal fuse is integrated, and the fuse is arranged within the housing and/or embedded in the adhesive or sealing layer. | 04-14-2011 |
20110070482 | GALVANIC ELEMENT HAVING FOIL SEAL - A galvanic element with a metallic foil housing which encloses at least one positive and at least one negative electrode, wherein the foil housing is sealed by a plastics foil including at least partly of a polymer which has acid groups and/or which has anhydride groups, and/or which has groups derived therefrom. | 03-24-2011 |
20100239915 | ELECTRODES AND LITHIUM-ION CELLS WITH A NOVEL ELECTRODE BINDER - An electrode for a lithium ion battery includes a matrix based on at least one polysaccharide and also particles of at least one electrochemically active material which are embedded in the matrix, with the electrode being free of synthetic polymeric compounds. A battery contains the electrode and a polysaccharide is a binder for electrochemically active electrode materials for such an electrode. | 09-23-2010 |
20100081049 | Electrochemical Element - A battery having at least one positive and at least one negative electrode arranged alongside one another on a flat, electrically nonconductive substrate and connected to one another via an electrolyte which conducts ions. | 04-01-2010 |
20090029203 | Fuel Cell System With an Electrochemical Hydrogen Generation Cell - A system for supplying a consuming appliance with electric energy, including at least one fuel supply unit in the form of a gas evolution cell which liberates a gaseous fuel on passage of an electric current and at least one fuel cell unit in which the gaseous fuel liberated can be reacted with an oxidant to generate electric power. | 01-29-2009 |