Electricity: electrical systems and devices – Electrolytic systems or devices – Liquid electrolytic capacitor
Patent
1989-05-01
1989-12-05
Griffin, Donald A.
Electricity: electrical systems and devices
Electrolytic systems or devices
Liquid electrolytic capacitor
252 622, H01G 902
Patent
active
048856606
ABSTRACT:
An electrolytic capacitor having aluminum anode and cathode members separated by an insulating spacer impregnated with an electrolyte which is free of dibasic acids including citric acid. The electrolyte consists essentially of a solution of boric acid and an amine having a molecular weight of not greater than 175 in a mixture of a member of the group consisting of butzrolactone, dimethylacetamide and dimechylformamide and mixtures of dimethylacetamide and dimethylformamide in a major amount and a polyalkylene glycol having a molecular weight of not greater thann 2000 in a minor amount. The capacitor is adapted for use at a medium to high operating voltage and over a wide temperature range and to develop little or no gas even when operated at voltages above 200.
REFERENCES:
patent: 3931552 (1976-01-01), Anderson et al.
patent: 4447346 (1984-05-01), MacNamee et al.
patent: 4479166 (1984-10-01), Finkelstein et al.
patent: 4774011 (1988-09-01), Mori et al.
patent: 4786429 (1988-11-01), Mori et al.
patent: 4812951 (1989-03-01), Melody et al.
Griffin Donald A.
North American Philips Corporation
Spain Norman N.
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