Patent ID: 7595643
Filing Date: 2009-09-29
Classification: G01R

Abstract:
1. A battery testing method that is based on battery rating standards, the method comprising: (a) measuring a dynamic parameter of the battery; (b) obtaining an open circuit voltage of the battery; (c) obtaining a temperature of the battery; (d) setting a predetermined load resistance value; (e) estimating a full charge dynamic parameter and a full charge open circuit voltage of the battery; (f) estimating a load voltage of the battery as a function of the estimated charged battery dynamic parameter, the charged open circuit voltage of the battery, the load resistance value and the temperature of the battery; (g) predicting a full charge bounceback voltage; and (h) utilizing the full charge bounceback voltage and the load voltage to rate the strength of the battery, wherein bounceback voltage is a change in voltage after the battery is initially released from a load until a later time, and wherein predicting the full charge bounceback voltage comprises determining the full charge bounceback voltage without subjecting the battery to a high load.