Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 5,773,978
Battery Impedance Monitor
Patentee:
Thomas P. Becker (exact or similar names) - Kenosha, WI

USPTO Classifications:
324/430, 324/436, 340/636.1, 340/636.11, 340/636.15

Tool Categories:

Assignees:
Snap-On Technologies, Inc. - Lincolnshire, IL

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Oct. 25, 1996
Granted: Jun. 30, 1998

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Stan Schulz
Snap-On Tools Company History
Description:
Emrich & Dithmar - patent attorneys

Abstract

A battery impedance monitor includes a driver section having an oscillator which produces a pulsating loading signal which controls periodic loading of the battery to produce at its output terminals a pulsating voltage component having a peak-to-peak amplitude superimposed on the DC output voltage of the battery. This pulsating voltage component is detected in a measuring section, which applies the battery output through a voltage divider to a peak detector which outputs an indicating voltage level proportional to the peak-to-peak amplitude of the pulsating output signal, this indicating level being held on a storage capacitor. The voltage divider includes a Zener diode which shifts the DC level of the battery output without affecting the amplitude of the pulsating component. The measuring section is electrically connected to the driver section only through the battery terminals, but the storage capacitor is coupled to the oscillator through a load resistor and an opto-isolator which provides a discharge path for the storage capacitor during each loading pulse, so that the detector can follow decreasing as well as increasing indicator voltage levels. A delay circuit delays application of the loading pulses to the battery so that the discharge path is removed before the end of each pulse of the battery output voltage.

Copyright © 2002-2024 - DATAMP