Electronic battery tester
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United States of America Patent
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Jan 9, 2001
Grant Date -
N/A
app pub date -
Mar 9, 1999
filing date -
Apr 27, 1998
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An apparatus for electronically testing or monitoring the condition of a storage battery is provided. The apparatus includes an inductance cancellation circuit for use in a Kelvin probe of an electronic battery tester. The induction cancellation circuit reduces inductive coupling between leads of the Kelvin probe. The apparatus also includes a DC coupled AC amplifier for amplifying an AC response signal of an electronic battery tester. Other aspects include a critically damped band-pass filter a response signal, a DC to DC convertor isolation circuit, operator editable test criteria, a battery temperature sensing element, an automatically adjustable gain stage and the use of an internal reference standard for a self calibration.
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