SYSTEM FOR DETERMINING BATTERY IMPEDANCE

摘要

A method for real-time characterization of a battery (48) in a power system (11) includes providing electric power to one or more electrical power loads (46). The method may also include charging and discharging the battery based on power needs of the one or more electrical power loads. Additionally, the method may include monitoring with at least one information-processing device (152) for a circumstance where charging and discharging of the battery based on the power needs of the one or more electrical power loads results in terminal voltage of the battery substantially equaling open-circuit voltage of the battery and recording the measured terminal voltage as a first measured voltage. The method may also include monitoring for a circumstance subsequent to the 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 battery current larger than a predetermined value and recording an existing terminal voltage as a second measured voltage with the at least one information-processing device. The method may also include using the first and second measured voltages to determine a measured internal impedance of the battery with the at least one information-processing device. These actions may be performed between startup and shutdown of the power system.