Current Imbalance in Parallel Battery Strings Measured Using a Hall‐Effect Sensor Array

Herein, individual cell currents in parallel connected battery strings are measured using micro-Hall-effect sensors. Cells routinely electrical series and to meet the power energy requirements of automotive consumer electronics applications. have been extensively studied; however, cells often assumed be a “black box” management systems. Poor pack design can result positive feedback between current temperature differentials along string, driving greater levels heterogeneous behavior uneven degradation. noninvasive multisensor array board Hall-effect sensors is used individually record passing through eight two different configurations, showing highly distribution. Characteristic “waves” found propagate string rebalancing occur over hundreds seconds with up 1 C rate.