Rheinisch-westfalisches Elektrizitatswerk Ag

Gerhard Rauschenbach

Heinz Peter Fritz

Jurgen Besenhardt

A lead-acid storage cell is operated at a temperature of about 70.degree. C and comprises a positive electrode which, in the charged state, carries an active mass consisting predominantly of lead dioxide, a negative electrode consisting predominantly of lead in the charged condition, and a sulfuric acid electrolyte. To permit the storage cell to operate at the elevated temperature without deterioration, the negative electrode is provided with a sheath permeable to the electrolyte but impermeable to particles released from the negative electrode. The sheath, which may constitute the interelectrode separator, can consist of a nonwoven or woven fabric of glass fiber or a nonwoven or woven fabric of unsubstituted or perhalogenated polyolefin or a layer of ceramic. The electrolyte in the cell is covered by a vaporization-resistant layer consisting of floating solid particles or a liquid which is unaffected by the high operating temperature. The battery or cell can be heated so as to permit its discharge, for example, at the aforementioned optimum temperature of about 70.degree. C.

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Essen, Germany

Gerhard Rauschenbach