GTE Battery Management System: State of Charge Indicator Evaluation

摘要

This report gives a description of the battery management system (BMS), its history, components, and function. The testing of two BMSs at GTE Laboratories is summarized. Certainly the bulk of this report is devoted to the INEL testing of the most troublesome component of the BMS, the Gould state of charge indicator (SCI). The SCI does track the battery state of charge but does not meet the requirement of +0, -20%. The limitations of the Gould SCI appears to be two things; (1) the 10kW discharge rate used to predict the remaining energy, and (2) high current peaks are not taken into account in calculating battery capacity. Software implementation of the Gould SCI is recommended for future work. 7 refs., 21 figs., 10 tabs. (ERA citation 13:024599)