Low battery power state determination apparatus and method for s

Details Low battery power state determination apparatus and method for s Low battery power state determination apparatus and method for s

1995-05-24

1997-10-07

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 21, 320 32, H01M 1044, H02J 700

Patent

active

056752369

ABSTRACT:
Current of electricity provided from a secondary battery 1 to a load 2, such as a personal computer and a printer, is determined by a current determination circuit 8. The detected result is compared with a predetermined threshold by a comparing circuit 7, the comparison result is used to deciding a voltage threshold for judging whether or not the secondary battery is in a low battery power state. After the voltage threshold is decided, a terminal voltage of the secondary battery is measured by a voltage determination circuit 6, then the measured result is compared with the voltage threshold. Thereby whether or not the secondary battery 1 is in a low battery power state is judged.

REFERENCES:
patent: 4906055 (1990-03-01), Horiuchi
patent: 4929931 (1990-05-01), McCuen
patent: 5032825 (1991-07-01), Kuznicki
patent: 5166623 (1992-11-01), Ganio
patent: 5287286 (1994-02-01), Ninomiya
patent: 5343137 (1994-08-01), Kitaoka et al.
patent: 5355072 (1994-10-01), Satsuma et al.

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