BATTERY PACK AND METHOD FOR MINIMIZING CELL VOLTAGE DEVIATIONS

摘要

In one aspect, a battery pack and a method of minimizing voltage deviations between battery cells within the battery pack is disclosed. The battery pack comprises a plurality of battery racks where each of the battery racks in turn comprises a plurality of battery cells. The battery pack also comprises a bidirectional inverter and a plurality of switch sets, where each of the switch sets are connected to one of the battery racks and is configured to electrically connect the bidirectional inverter and the battery racks. The battery pack additionally comprises a plurality of battery rack management systems, where each of the battery rack management systems is electrically connected to one of the battery racks and is configured to minimize voltage deviations between the battery cells. The battery rack management systems are also connected to a main battery management system configured to minimize voltage deviations between the battery racks.

主权项

1. A battery pack comprising:
a plurality of battery racks, each of the battery racks comprising a plurality of battery cells; a bidirectional inverter having a first terminal and a second terminal, the first terminal configured to be electrically connected to positive terminals of the battery racks and the second terminal configured to be electrically connected to negative terminals of the battery racks; a plurality of switch sets, each of the switch sets connected to one of the battery racks and configured to electrically connect the bidirectional inverter and the one battery rack; a plurality of battery rack management systems, each of the battery rack management systems electrically connected to one of the battery racks and configured to reduce voltage deviations between the battery cells included in the one battery rack below a first predetermined level; and a main battery management system connected to each of the battery rack management systems and configured to reduce voltage deviations between the battery racks below a second predetermined level.