Patent ID: 9018913
Filing Date: 2015-04-28
Classification: G01R,H02J

Abstract:
1. A method for real-time characterization of a battery in a power system, the method comprising: between startup and shutdown of the power system, operating the power system by: providing electric power to one or more electrical power loads of the power system, charging and discharging the battery based on power needs of the one or more electrical power loads, with at least one information-processing device, monitoring for a circumstance where the charging and discharging of the battery based on the power needs of the one or more electrical power loads results in a measured terminal voltage of the battery substantially equaling an open-circuit voltage of the battery and recording the measured terminal voltage as a first measured voltage, with the at least one information-processing device, monitoring for a circumstance subsequent to the measured terminal voltage substantially equaling the open-circuit voltage when charging and discharging the battery based on the power needs of the electrical power loads results in a battery current larger than a predetermined value and recording an existing terminal voltage as a second measured voltage, and with the at least one information-processing device, using the battery current larger than a predetermined value, the first measured voltage and the second measured voltage to determine an internal impedance of the battery, wherein the internal impedance of the battery is equal to the difference between the first measured voltage and the second measured voltage divided by the battery current larger than a predetermined value.