| CPC H02J 7/0024 (2013.01) [H02J 7/0016 (2013.01); H02J 7/0019 (2013.01); H02J 7/007182 (2020.01)] | 5 Claims |
|
1. A charging control device which charges a battery device, the battery device including:
a battery group with a plurality of storage battery systems in parallel in each of which a plurality of batteries are connected in series,
a plurality of system switches which switch between connection and disconnection of the storage battery system, a respective one of the system switches is connected in series with a respective one of the storage battery systems, and
a plurality of bypass switches which bypass each of the plurality of batteries constructing the plurality of storage battery systems,
the charging control device comprising:
a control unit that is configured to control each of the system switches and the bypass switches and to control charging of the battery device,
wherein the control unit is configured to estimate a total voltage for each of the storage battery systems when all batteries of each of the storage battery systems are not bypassed,
turn on a corresponding one of the system switches to select one of the storage battery systems having a low voltage among the estimated total voltages,
turn off a different one of the system switches to disconnect a different one of the storage battery systems having a high voltage among the estimated voltages, and
then repeatedly execute selective charging of the one of the storage battery systems so that an estimated total voltage difference between the one of the storage battery systems and the different one of the storage battery systems is less than a predetermined value.
|