Amazon.com, Inc.
Recharging of backup battery units using intermittent charging cycles

Abstract:

Recharging of battery backup units in a power supply system employs sequences of charging cycles segments and non-charging segments to reduce the additional power draw induced by recharging of the battery backup units. A method of operating a power supply system includes independently controlling recharging of battery backup units by using respective sequences first BBU charging segments and first BBU non-charging segments so that at least one of the charging segments for one of the battery backup units overlaps one of the non-charging segments of another of the battery backup units.