Battery tester

Details Battery tester Battery tester

1997-02-14

1999-01-19

Trammell, James P.

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

702 64, 702 65, 702 82, 702133, 324432, 324430, 324428, 324437, 324433, 324431, 324 731, 340636, G01N 2704, G01N 2727

Patent

active

058625151

ABSTRACT:
A battery tester is formed at an AC constant-current generator for applying an AC current for measurement to a battery BT under test via a coupling capacitor, an internal resistance detecting device for detecting the internal resistance of the battery BT according to a voltage signal therefrom when the AC current is applied, a voltage detecting device for detecting the terminal voltage across the battery, and a deterioration judging unit for judging the deterioration of the battery from the internal resistance and terminal voltage detected by the internal resistance detecting device and the voltage detecting device. The internal resistance and terminal voltage of the battery are measured simultaneously, and deterioration of the battery is judged from the measurement data.

REFERENCES:
patent: 4423378 (1983-12-01), Marino et al.
patent: 4719428 (1988-01-01), Liebermann
patent: 5592093 (1997-01-01), Klingbiel

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