Capacitor Based Battery Balancing System

Battery systems as a vital part of the electrical vehicles are facing major difficulty which is the cells unbalancing. The cells unbalancing leads to individual cell voltages will differ over time, decreasing the battery pack capacity that consequently will fail of the total battery system. In addition, cell equalization acts an important role on the battery life preserving. Several cell balancing topologies have been proposed for battery pack such as; shunt resistor, inductor/transformer base, shuttling capacitor and energy converters. Quite a few researches focused the capacitor base cell balancing. This paper is presents a review, comparisons and develop the capacitor based topologies for balancing battery string. With the aid of MATLAB/Simulink® modeling the topologies have been proposed including circuits, cells balancing simulation, implementations, balancing speed, complexity, system efficiency as well as control strategy development.

Jaar van publicatie:2012

Trefwoorden:Battery balancing, Switching capacitor, MATLAB/Simulink, Battery management system, Cell equalization