The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 1990
Filed:
Apr. 10, 1989
Karl Kordesch, Graz, AT;
Ronald Ujj, Graz, AT;
Battery Technologies Inc., Mississauga, CA;
Abstract
A resistance free constant voltage taper charger for batteries in which a voltage regulator of a conventional type is combined with a conventional instrumentation amplifier in such a way that the output voltage increases by the same amount as a reference voltage coupled to the input of the amplifier is varied. The result will be that the voltage at the final output is constant. The same basic circuit can be complemented with two switches and with a sample and hold circuit controlled by a pulse generator so that in short pulse periods the voltage regulator is disabled and the resistance free electrochemical battery voltage is samples, and during the longer intervals between the periods the sampled and stored value is used to regulate the output voltage so that the electrochemical voltage remains unchanged.