VOLTAGE SHARING OF SERIES CONNECTED BATTERY MODULES IN A PLUG-AND-PLAY DC MICROGRID

An apparatus for voltage sharing of series connected battery modules in a DC microgrid includes a battery management system and a battery module controller that generates, for an mof N converters connected together to a DC microbus, a droop current ĩthat includes a converter voltage error signal {tilde over (v)}multiplied by a droop multiplier g(i). Each converter is a DC/DC converter connected between a battery module, with one or more battery cells, and the DC microbus. The mconverter uses the droop current ĩ, a common current reference ĩof a battery pack that includes the battery modules and an input current ĩto the mconverter to control switching of the mconverter. The common current reference ĩis from the battery management system. The voltage error signal {tilde over (v)}is based on an output voltage {tilde over (v)}of the mconverter and an average converter output voltage {tilde over (v)}eodcmastereodcmastereodcmaster.