An efficient battery balancing scheme in electric vehicle

This paper proposes a new balancing scheme for lithium ion battery, using inductance realizes energy transfer between the whole battery pack and single cell. The balanced circuit is composed of two groups of switches and an inductor. The scheme uses constant current mode, and its balancing current is controlled by a closed current loop adjusted by PI, so the balancing current is constant and controllable. Finally, in the environment of matlab-simulink, the experiments have been completed, and the experimental results prove that the balancing scheme is feasible and its balancing efficiency is high.