Varta Batterie Aktiengesellschaft

Tsvetko Chobanov

Ernst Voss

Friedrich Woeffler

Margarete Jung

Dieter Kunze

Walter Karl Lux

In the manufacture of cells, e.g. of the system Li-Al/LiCl-KCl/FeS.sub.x, the finely divided raw materials for the electrodes and for an included ceramic separator are respectively mixed individually with the electrolyte salt, as well as with a synthetic plastic which is decomposable without residue under heat. The mixtures are rolled into plates, and the plates are heated above the decomposition temperature of the plastic after assembly. The plastic is preferably a polyhydrocarbon such as polyisobutylene and is preferably introduced by means of a solvent. It makes the powder mixtures plastifiable and suitable for rolling. This makes it possible to produce ceramic separators, which are fundamentally composed only of loose particle accumulations, in the form of plates of uniform structure and strength and to handle these in the same way as electrode plates during cell assembly.

Manufacture of electrochemical high temperature cells

Lead dust evolution from battery plates is reduced by applying a coating containing a silicate. Also plates so produced.

Dust reduction for electrode plates

Silver-II-oxide for use in galvanic elements is produced by adding an oxidant to a metallic silver powder suspension in an alkaline solution. An exceptionally stable material results.

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Frankfurt am Main, Germany

Tsvetko Chobanov