Battery charger having a multiple function sense line

Details Battery charger having a multiple function sense line Battery charger having a multiple function sense line

1994-11-29

1996-12-31

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

H02J 700

Patent

active

055897568

ABSTRACT:
The battery charging system of the present invention charges the battery (105) of a portable, multiple mode radiotelephone (110) while the radiotelephone is operating. The radiotelephone (110) generates a clock signal having varying on/off times dependent on the radiotelephone's mode. This mode can include an analog cellular mode or a digital cellular mode. The battery charger (100) detects the clock signal's on/off times and changes the average charge current to compensate for one mode requiring a larger charge current. The clock signal is coupled to the charger using the same multiple function connection (160) as the battery's thermistor (150). The charger (100) uses the thermistor (150) to determine when the battery (105) is charged.

REFERENCES:
patent: 5018188 (1991-05-01), Kowalski et al.
patent: 5113127 (1992-05-01), Hoffman et al.
patent: 5113128 (1992-05-01), Ohara et al.
patent: 5115182 (1992-05-01), Ehmke et al.
patent: 5150031 (1992-09-01), James et al.
patent: 5317249 (1994-05-01), Ford
patent: 5325040 (1994-06-01), Bogut et al.
patent: 5333176 (1994-07-01), Burke et al.
patent: 5371453 (1994-12-01), Fernandez
patent: 5422559 (1995-06-01), Hall et al.

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