The inconsistency between the battery cells can cause the over-charging and over-discharging issue to the series string. Among various balancing techniques, the converter-based methods prevail over the others due to the advantages of speed and efficiency in a large-scale application. However, the conventional control strategies are non-optimized enough to be applied to the embedded system. This paper proposes an optimal coordinated operation algorithm for a bidirectional equalizer-integrated charger that can be embedded into the BMS hardware. The charger-transfer algorithm can coordinate the charging/discharging process with the equalizing process. The proposed charger-transfer algorithm is verified by PSIM for 20 series-connected battery cells. The simulation results show a high equalization performance with an optimal operating time, compared to the conventional methods. Therefore, the charger-transfer algorithm can be applied for a large number of series connections by a single embedded system-based BMS.
The inconsistency between the battery cells can cause the over-charging and over-discharging issue to the series string. Among various balancing techniques, the converter-based methods prevail over the others due to the advantages of speed and efficiency in a large-scale application.
However
, the conventional control strategies are non-optimized
enough
to
be applied
to the embedded system. This paper proposes an optimal coordinated operation
algorithm
for a bidirectional equalizer-integrated charger that can
be embedded
into the BMS hardware. The charger-transfer
algorithm
can coordinate the charging/discharging process with the equalizing process. The proposed charger-transfer
algorithm
is verified
by
PSIM
for 20 series-connected battery cells.
The
simulation results
show
a high equalization performance with an optimal operating time, compared to the conventional methods.
Therefore
, the charger-transfer
algorithm
can
be applied
for
a large number of
series connections by a single embedded system-based BMS.