Title :
Discharge current steering for battery lifetime optimization
Author :
Benini, Luca ; Macii, Alberto ; Macii, Enrico ; Poncino, Massimo
Author_Institution :
Bologna Univ., Italy
Abstract :
Recent work on battery-driven power management has demonstrated that sequential discharge is suboptimal in multi-battery systems, and lifetime can be maximized by distributing (steering) the current load on the available batteries, thereby discharging them in a partially concurrent fashion. Based on these observations, we formulate multi-battery life-time maximization as a continuous, constrained optimization problem, which can be efficiently solved by nonlinear optimizers. We show that great lifetime extensions can be obtained with respect to standard sequential discharge, as well to previously proposed battery allocation schemes.
Keywords :
cells (electric); circuit optimisation; load (electric); battery lifetime optimization; battery-driven power management; concurrent discharge; continuous constrained optimization problem; current allocation method; discharge current steering; load characterization; load optimization; multi-battery lifetime maximization; multi-battery systems; nonlinear optimizers; Battery management systems; Computer applications; Constraint optimization; Design optimization; Energy management; Manufacturing; Permission; Power engineering computing; Power supplies; Power system management;
Conference_Titel :
Low Power Electronics and Design, 2002. ISLPED '02. Proceedings of the 2002 International Symposium on
Print_ISBN :
1-5811-3475-4
DOI :
10.1109/LPE.2002.146723
