Process for determining the backup time of a battery

Details Process for determining the backup time of a battery Process for determining the backup time of a battery

G - Physics

01

R

G01R 31/36 (2006.01) G06F 1/26 (2006.01)

Patent

CA 2101279

PROCESS FOR DETERMINING THE BACKUP TIME OF A BATTERY The backup time (T) of the battery is obtained lay simulation, in iterative manner, of discharging of the battery during successive simulated time intervals (.DELTA.T). During each of the simulated time intervals, a simulated discharging current (i) in terms of the actual discharge power (P), a simulated voltage (E), and a simulated state of charge (S) are computed in accordance with a mathematical model equivalent to the battery. The backup time (T) of the battery is equal to the sum of the simulated time intervals necessary for the simulated voltage (E) to reach a preset threshold (Emin). The process enables ageing of the battery to be taken into account and an alarm to be provided when the lifetime of the battery becomes too short.

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