Electronic battery testing device with automatic voltage scaling

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United States of America Patent

PATENT NO 4825170
SERIAL NO

07198484

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Abstract

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A self-contained electronic device for testing disparate storage batteries having any one of a fixed plurality of possible nominal voltages is disclosed. The testing device performs small-signal measurements of a battery's dynamic conductance and provides either a proportional numerical readout, displayed in appropriate battery measuring units, or a corresponding qualitative assessment of the battery's relative condition. Special voltage-sensing circuitry within the testing device identifies the particular one of the possible nominal voltages possessed by the battery and scales the dynamic conductance measurements accordingly. As a result, the quantitative or qualitative information provided to the user is automatically adjusted to comport with the nominal voltage of the battery undergoing test without the user having to actually input the battery's nominal voltage to the testing device.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Champlin, Keith S 5437 Elliot Ave. S., Minneapolis, MN 55417 34 4843

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