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AssigneeDeutsche Automobilgesellschaft mbH
InventorsGerhard Berger, Gabor Benczur-Urmossy, Klaus von Benda
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A nickel-cadmium storage battery with improved electrical properties is described in which one or more copolymers of vinyl pyrrolidone is/are added as expander to the active material with which the negative electrode is filled or to the electrolyte. The polymers have a mean molecular weight of 10,000 g/mol to 100,000 g/mol, with a vinyl pyrrolidone content of between 5 and 95 mol-%. The copolymers are added to the active material or to the electrolyte in an amount of 0.1 to 1.0% by weight, based on the active material. As a result of adding the copolymers, a malfunction-free operation of the storage battery is achieved, accompanied by a simultaneously equally as good degree of utilization of the cadmium active material compared with a storage battery which contains homopolymeric polyvinyl pyrrolidone.
Nickel-cadmium storage battery with improved electrical properties, in which the active material with which the negative electrode is filled or the electrolyte contains copolymers of vinyl pyrrolidone as expander, one or more copolymers of vinyl pyrrolidone having a mean molecular weight of 10,000 g/mol to 100,000 g/mol and a vinyl pyrrolidone content of between 5 and 95 mol-%.
Dependencies are inferred from the claim text.