Battery management system and method of driving the same

Details Battery management system and method of driving the same Battery management system and method of driving the same

2007-08-29

2010-12-07

Tso, Edward (Department: 2858)

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

C324S426000, C324S432000

Reexamination Certificate

active

07847557

ABSTRACT:
A battery management system that estimates an internal impedance of a battery, a method of driving the same, a device that estimates an internal impedance of a battery, and a method of estimating the internal impedance of a battery. A method of driving a battery management system that estimates the internal impedance of a battery including a plurality of cells includes generating a battery equivalent model of the battery, receiving a terminal voltage signal and a charge and discharge current signal of the battery, and generating a first discrete signal corresponding to the terminal voltage signal of the battery and a second discrete signal corresponding to the charge and discharge current signal of the battery, and filtering the first discrete signal and the second discrete signal according to a frequency range corresponding to the battery equivalent model so as to estimate the internal impedance of the battery. The device that estimates an internal impedance of a battery filters the first discrete signal and the second discrete signal according to a frequency range corresponding to the battery equivalent model so as to estimate the internal impedance of the battery.

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