Abstract: An electrical accumulator having a case in the form of a button cell which is closed such that it is gastight, including a case cover and a case cup with an interposed electrically insulating seal, which contain an electrode set including positive and negative electrodes as well as interposed separators, with at least two electrodes of one polarity being mechanically. and electrically connected at at least two points on their circumference in such a manner that a mechanically robust electrode packet results. The invention furthermore relates to a method for producing such a rechargeable battery.

Abstract: A gastight-sealed alkaline nickel/metal hydride storage battery in the form of a button cell having positive and negative electrodes which are arranged in the cell case and separated by a separator. Both electrodes have a support and conductor framework, which consists of a porous metal foam or metal felt, the positive electrode having a metallic region which is free of active material on the side bearing against the cell case.

Abstract: A process for the production of prismatic alkaline accumulator cells of rectangular cross-section, wherein firstly an electrode unit comprising positive and negative electrodes with interposed separators and a cover of plastic material is produced. The cover has a feed through arrangement and connecting contacts for the electrodes. After the casing of the plastic material is filled with a measured amount of electrolyte, the electrode unit is lowered step wise and with pauses into the casing in such a way that the dry electrode pack can become fully impregnated by absorption without electrolyte issuing from the casing. When the cover is then fitted on the casing, the two parts are welded together to afford absolute sealing integrity.

Abstract: In a gas-tight alkaline accumulator with a casing which at least partially comprises plastic material and in which are arranged electrodes which are surrounded by an electrolyte and which are respectively separated from each other by a separator, wherein the electrodes are connected to pole contacts for electric current to be fed to and away therefrom, in order to increase the operating reliability of the accumulator and to avoid further disadvantages, there is provided a valve having an opening which passes through the casing of the accumulator, and a deformable element which, in the event of an increased pressure occurring within the casing, provides for liberation of the opening and, after a drop in the increased pressure, closing of the opening.

Abstract: So that an accumulator having a gas-tight and liquid-tight, electrolyte-filled casing in which are arranged electrodes which are separated from each other by a separator and which are each electrically connected to pole contacts accessible from the outside of the casing can be produced in an advantageous manner from the point of view of the manufacturing procedure, wherein the accumulator is to have a durably and reliably sealed casing which is not restricted in terms of its shape, it is provided that in the region of the pole contacts the casing comprises a soft plastic material and a hard plastic material which are fixedly connected together, the soft plastic material forming a seal for the pole contacts and/or the feed-through ducting means of the pole contacts.

Abstract: A closed gas-tight battery comprised of cells having electrodes, separators and electrolyte, each cell having its own housing which is open at one face and constituted of a circumferential plastic wall forming a sealing element in conjunction with a disk-shaped conductive face wall. The face wall is mounted at its peripheral rim in the one end portion of the circumferential wall, in gas and liquid-tight fashion. An end of the circumferential wall is flush, at the open end of the cell housing, with the plane of an adjoining cell component, while the other housing end lies in one plane with the outside surface of the conductive wall of the cell. Each cell forms a separate unit, and a stack of such units is sheathed by the battery casing to be sealed gas-tight.