A New Practical Electric Vehicle Battery Management System

Abstract

The lithium battery gradually becomes the mainstream of traction battery owing to its small volume, light weight, high voltage, high power, less self discharge, long service life and other advantages. However certain management is required during the application of Li-ion battery for its obvious nonlinearity, inconsistency and time-variant characteristics. If lithium batteries are used in power equipment in serial, they may have different charge and discharge due to different internal characteristics, when one battery deteriorates, the behavior characteristics of the entire battery pack will be limited so as to lead to deteriorated battery pack performances. The lithium power battery pack management system designed here is installed inside lithium battery pack, takes MCU as the control core and equalizes energy of each lithium battery while achieving over charge, over discharge, overcurrent and short circuit protection. © Springer-Verlag Berlin Heidelberg 2011.