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ELECTRIFIED VEHICLE DC POWER CONVERSION WITH DISTRIBUTED CONTROL

United States Patent Application

20180050603
A1
View the Complete Application at the US Patent & Trademark Office
An electrified vehicle has a battery pack comprising series-connected battery units providing a main voltage. To supply a lower voltage bus equally from all battery units, a plurality of DC/DC converters are powered by respective units and have their outputs in parallel. A central module has an outer loop controller generating a target current to regulate the bus voltage to a predetermined voltage and has an allocator distributing the target current into a plurality of allocated current commands according to respective states of charge of the battery units. A plurality of local controllers each adjusts a current of a respective DC/DC converter. Each local controller receives a respective allocated current command as a respective feedforward control variable. Each local controller uses an error between the bus voltage and the predetermined voltage to be integrated as a respective feedback control variable only when the error is above a threshold.
HAND, III, MICHAEL J. (YPSILANTI, MI), ANDERSON, RICHARD DYCHE (PLYMOUTH, MI)
15/ 238,003
August 16, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0001] This invention was made with Government support under Contract No. DE-AR0000271 awarded by the Department of Energy. The Government has certain rights to the invention.