Process for determining the backup time of a battery

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Details

324427, 340636, 364480, 364481, G06F 1520

Patent

active

053813502

ABSTRACT:
The backup time of the battery is obtained by estimation, in iterative manner, of discharging of the battery during successive estimated time intervals. During each of the estimated time intervals, an estimated discharging current in terms of the actual discharge power, an estimated voltage, and an estimated state of charge are computed in accordance with a mathematical model equivalent to the battery. The backup time of the battery is equal to the sum of the estimated time intervals necessary for the estimated voltage to reach a preset threshold. 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.

REFERENCES:
patent: 3411091 (1968-11-01), Umeda
patent: 4333149 (1982-06-01), Taylor et al.
patent: 4677363 (1987-06-01), Kopmann
patent: 4743831 (1988-05-01), Young
patent: 4803416 (1989-02-01), Abiven et al.
patent: 4876513 (1989-10-01), Brilmyer et al.
patent: 4952862 (1990-08-01), Baigetti et al.
patent: 5124627 (1992-06-01), Okada
patent: 5193067 (1993-03-01), Sato et al.
Shinji Ishizuki et al., "Equipment for the Calculation of Battery Remaining Discharge Time in Telecommunications System", Jul. 1991.

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