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:
May. 07, 2002
Filed:
Mar. 13, 2001
Hamid Namaky, South Russell, OH (US);
Actron Manufacturing Co., Cleveland, OH (US);
Abstract
A method of measuring a condition of a battery is disclosed comprising the steps of: inducing an AC signal across the terminals of the battery by applying an AC current load thereto; measuring the induced AC signal and converting it to a first voltage potential signal which is a measure of the battery's internal resistance; applying the first voltage potential signal across a voltage divider network calibrated in accordance with a predetermined battery rating scale to render a multiplicity of second voltage potential signals at a corresponding multiplicity of taps along the voltage divider network, values of the second voltage potential signals being representative of the calibrated battery rating scale; and sequentially selecting the second voltage potential signals along the taps for comparison with a threshold voltage potential signal to determine a measure of the condition of the battery. An electronic battery tester is also disclosed including a voltage divider network coupled across the first voltage potential signal and calibrated in accordance with a predetermined battery rating scale to create from the first voltage potential signal a multiplicity of second voltage potential signals at a corresponding multiplicity of taps along the voltage divider network, and a rotary switch for selecting the second voltage potential signal of the multiplicity of second voltage potential signals along the taps based on a predetermined battery rating of the battery under test for comparison with a threshold voltage potential signal to determine a condition of the battery.