A microprocessor-based battery management system

Abstract

The system was developed for the management of industrial truck batteries and battery charging equipment, but the concepts and architectures used can be expanded for use with stationary battery systems. With the battery charger as an integral part of the BMS (battery management system), modifications in the charging scenario such as automatic equalizing can be introduced. Discharge tests can be performed on command by the charger's microprocessor or from the external computer. Self-diagnostics within the battery are reported to the computer as well. Records on cell temperature, voltages, currents, discharge periods, and faults are stored in a nonvolatile RAM and may be displayed or printed as required. The BMS becomes an even more valuable tool with remote site installations. Without a need for human involvement, the computer, located at a central office, can dial up remote sites, retrieve data, and make charger adjustments and/or settings.<>