Title :
Estimating the state of charge of a battery
Author :
Chiasson, John ; Vairamohan, Baskar
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of Tennessee, Knoxville, TN, USA
fDate :
5/1/2005 12:00:00 AM
Abstract :
This brief considers the state of charge (SOC) estimation problem for electrochemical batteries. Using an electric circuit model of the battery given in the literature, it is shown how the open-circuit voltage (which is directly related to the SOC) can be estimated based on the terminal voltage and current measurements provided there is sufficient variation in the battery current.
Keywords :
battery management systems; electric charge; observability; secondary cells; state estimation; time-varying systems; battery state of charge; electrochemical batteries; linear time-varying system; observability; state estimation; Battery charge measurement; Capacitance; Circuits; Current measurement; Electric resistance; Filters; Observability; State estimation; Time varying systems; Voltage; Battery; linear time-varying systems; observability Gramian; state of charge (SOC);
Journal_Title :
Control Systems Technology, IEEE Transactions on
DOI :
10.1109/TCST.2004.839571
