Performance Evaluation of Multilevel Converter based Cell Balancer with Reciprocating Air Flow
Paper in proceeding, 2012

The modeling and design of an active battery cell balancing system using Multilevel Converter (MLC) for EV/HEV/PHEV is studied under unidirectional as well as reciprocating air flow. The MLC allows to independently switch ON/OFF each battery cell in a battery pack. The optimal policy (OP ) exploiting this extra degree-of-freedom can achieve both temperature and state-of-charge (SoC) balancing among the cells. The OP is calculated as the solution to a convex optimization problem based on the assumption of perfect state information and future driving. This study has shown that OP gives significant benefit in terms of reduction in temperature and SoC deviations, especially under parameter variations, compared to uniformly using all the cells. It is also shown that using reciprocating flow for OP gives no significant benefit. Thus, reciprocating flow is redundant for MLC-based active cell balancing system when operated using OP.

Convex Optimization

Cell Balancing

Hybrid Electric Vehicles

Battery Management Systems

Multilevel Converters


Faisal Altaf

Chalmers, Signals and Systems, Systems and control

Lars Johannesson

Chalmers, Signals and Systems, Systems and control

Bo Egardt

Chalmers, Signals and Systems, Systems and control

IEEE Vehicle Power and Propulsion Conference

706-713 6422634
978-146730953-0 (ISBN)

Driving Forces

Sustainable development

Areas of Advance



Subject Categories

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering





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