Patent ID: 9448287
Filing Date: 2016-09-20
CPC Classification: G01R

Claim Text:
1. A battery monitoring device for real-time measurement and monitoring of a battery module driving an actual load and having a plurality of battery cells connected together in series, comprising: a plurality of power and impedance calculators each provided for one of the plurality of battery cells, and configured to receive voltage signals and current signals from the plurality of battery cells, respectively and to measure instantaneous power values and internal impedance characteristics of the plurality of battery cells, respectively; a battery module state manager configured to receive output data of the plurality of power and impedance calculators via an internal bus, a load state monitor configured to monitor a state of load of the battery module, and to input a detection signal to the plurality of power and impedance calculators and the battery module state manager; and an accelerator work monitor configured to monitor movement of the accelerator which is part of a vehicle driving system as a load device of the battery module, and to supply the resulting detection signal to the plurality of power and impedance calculators and the battery module state manager, wherein, based on a detection signal of variation of at least one of an accelerator, current, voltage, or a power waveform, a condition occurs, the condition comprising extraction of at least one of the current, voltage, or power waveform, and setting at least one of a sampling clock frequency, correction of measurement data, or a frequency analysis, wherein each of the plurality of power and impedance calculators is configured to acquire measurement data at such a time resolution and based on a time span that optimum estimation of a time constant of reaction occurring in a battery cell is enabled according to the reaction time constant, and to estimate constants of an equivalent circuit that are considered to govern the time constant using the acquired measurement data.