Julie H Lee

20150377971, Dec 31, 2015

Jun 29, 2015

14/753962

Joseph Keating - Broomfield CO, US
Tai-Guang Huang - Guangzhou City, CN
Julie JoAnn Lee - Lorain OH, US
Michael Krzywosz - Warrenville IL, US
David Wilczewski - Lorain OH, US

ICC-NEXERGY, INC. - Westchester, IL

G01R 31/36
G01K 13/00
H02J 7/00

A power management system is disclosed for providing an indication of the required available capacity (RAC) available from a backup battery unit (BBU) for backup or peak loading as required by a critical DC load, such as a computer bus. The power management system is configured to repeatedly determine the gross remaining capacity of the backup battery unit (BBU). The system processes this information and other measured or known battery parameters to determine the required available capacity (RAC). The RAC is based upon the required capacity of the critical load to which the BBU is connected. In general, the RAC is the difference between the gross remaining capacity of the battery at a given point in time and the required capacity of the critical load. In accordance with an important feature of the power management system, an indication of the RAC is provided. This indication can be used to indicate that the battery needs to be replaced or that the battery requires service and might indicate that the battery needs to be charged, needs to be warmed up, cooled down, etc.