GALVANISK PRIMAERELEMENT MED ALKALISK ELEKTROLYTT SOM ER UTLADBART VED HOEY TEMPERATUR

摘要

An alkaline primary cell with an annular silver oxide or manganese dioxide cathode (2) and an internally located cadmium electrode (7), which has been produced by the so-called electrodeposition process by cathodic metal deposition from cadmium salt solutions on a carrier metal strip and wound to form a circular coil, can be used at temperatures of up to about 200 DEG C, because no hydrogen evolution takes place on such a negative electrode, as distinct from the case of using zinc. The metal housing can (1) of the round cell can therefore be joined hermetically sealed to the closing cover (11) by laser welding. The internal pressure in the cell is determined by the vapour pressure of the alkaline electrolyte (15). ……