Battery dropout correction for battery monitoring in mobile unit

Details Battery dropout correction for battery monitoring in mobile unit Battery dropout correction for battery monitoring in mobile unit

1999-06-04

2000-04-04

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320DIG21, H01M 1044, H01M 1046

Patent

active

060465743

ABSTRACT:
A mobile electronic device can operate in multiple modes, each at a respective current load. Monitoring a battery in such a mobile device includes acquiring a sensed battery voltage during a particular operating mode and converting the sensed battery voltage to a scaled voltage for a known battery discharge curve having a well-defined turn-off voltage. The known battery discharge curve is preferably one for a full current load. The scaled voltage is then compared with the well-defined turn-off voltage to determine the amount of energy remaining in the battery. Operating times for other operating modes can also be calculated and displayed for the user's information.

REFERENCES:
patent: 5473262 (1995-12-01), Yoshimatsu
patent: 5596260 (1997-01-01), Moravec et al.
patent: 5721482 (1998-02-01), Benvegar et al.
patent: 5838139 (1998-11-01), Greene
patent: 5844884 (1998-12-01), Szlenski
patent: 5936383 (1999-08-01), Ng et al.

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