Patent ID: 6359441
Filing Date: 2002-03-19
Classification: G01R

Abstract:
An electronic battery tester for determining condition of the storage battery, comprising:a four point Kelvin connection adapted to electrically couple to the terminals of the battery; an adjustable forcing function having a forcing function output with a time varying component having an adjustable level in response to an adjustment input, the forcing function output coupled to a first pair of connections of the Kelvin connection; a dynamic response sensor coupled to a second pair of connections of the Kelvin connection configured to provide a sensed output related to a time varying response of the battery to the forcing function; digital circuitry coupled to the forcing function and the dynamic response sensor configured to provide the adjustment input to the forcing function whereby the forcing function output level is changed between a plurality of different levels, the digital circuitry configured to measure a dynamic parameter of the battery as a function of the sensed output at a plurality of different forcing function levels.