Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 mm2, and 4) the air cathode is a substantially flat layer and seated directly on the bottom portion of the cell cup.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An emergency system for power failures includes a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, Ag2O/Zn or lithium-ion, and a charging electronics system that charges the battery, wherein the charging electronics system provides a charging voltage at which the battery does not overcharge at a temperature of up to 80° C., and wherein the charging electronics system supplies a charging voltage at which the battery is transferred into a charging state and/or is kept in a charging state, in which the battery is charged to 5% to 30%.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 mm2, and 4) the air cathode is a substantially flat layer and seated directly on the bottom portion of the cell cup.

Abstract: 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.

Abstract: 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.