METHOD AND APPARATUS TO DETERMINE BATTERY RESONANCE

摘要

A system and method to determine a resonant frequency of a battery is presented. One embodiment of the invention utilizes a PLL, digital or analog, to adjust the phase angle of a modulated current charging signal to that of the resonant frequency of the battery. A second embodiment of the invention utilizes an energy managed delta function to determine the resonant frequency of the battery. A third embodiment utilizes a small signal frequency sweep in order to determine the resonant frequency of the battery.