Apparatus and method for charging rechargeable battery using cha

Details Apparatus and method for charging rechargeable battery using cha Apparatus and method for charging rechargeable battery using cha

1998-12-08

2000-04-18

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage differential

320162, H01M 1044, H01M 1046

Patent

active

060519584

ABSTRACT:
An apparatus and method is provided for charging a rechargeable battery in a two-way pager. The pager has a transmitter, a main battery for supplying a main power source voltage, and the rechargeable battery for supplying a transmission power source voltage to the transmitter. The apparatus includes: a memory for storing a charge start voltage and a charge stop voltage; a charger for boosting the main power source voltage of the main battery to a driving voltage, detecting a voltage of the rechargeable battery, charging the rechargeable battery by boosting the main power source voltage of the main battery to a charge voltage in response to a charge start control signal, and terminating the charging of the rechargeable battery in response to a charge stop control signal; and a controller for receiving the driving voltage and the detected voltage, supplying the charge start control signal to the charger when the detected voltage is less than the charge start voltage, and supplying the charge stop control signal to the charger when the detected voltage is greater than the charge stop voltage.

REFERENCES:
patent: 4746852 (1988-05-01), Martin
patent: 4910103 (1990-03-01), Yoshikawa et al.
patent: 5153496 (1992-10-01), LaForge
patent: 5543702 (1996-08-01), Pfeiffer

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