Battery system and energy storage system including same

摘要

A battery system is disclosed. The battery system includes a plurality of battery cells, and a battery cell balancing unit, configured to adjust voltages across each of the battery cells to reduce variation among the voltages across the battery cells. The battery cell balancing unit includes a controller configured to receive a DC reference current and to generate an AC current based on the DC reference current, a transformer, a rectifier circuit including a rectifier connected to the output coil, and a switching unit including a plurality of switches, each configured to selectively connect the rectifier to one of the battery cells.

主权项

1. A battery system, comprising:
a plurality of battery cells; and a battery cell balancing unit, configured to adjust voltages across each of the battery cells to reduce variation among the voltages across the battery cells, the battery cell balancing unit comprising:
a controller configured to receive a DC reference current and to generate an AC current based on the DC reference current,a transformer comprising an input coil configured to receive the AC current, and an output coil coupled to the input coil,a rectifier circuit comprising a rectifier connected to the output coil, anda switching unit comprising a plurality of switches, each configured to selectively connect the rectifier to one of the battery cells.