Refreshing charge control method and apparatus to extend the lif

Details Refreshing charge control method and apparatus to extend the lif Refreshing charge control method and apparatus to extend the lif

1999-03-31

2000-01-04

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320150, 320160, H01M 1044, H01M 1046

Patent

active

060113804

ABSTRACT:
A method and apparatus for charging a battery which is operable to normally charge the battery at a first state of charge setting, to determine when the battery has been undercharged a predetermined number of times, and to charge the battery at a second state of charge setting after the battery is undercharged the predetermined number of times. The second state of charge setting is greater than the first state of charge setting. The method includes determining when the state of charge of the battery is below a predetermined level, charging the battery at the first state of charge setting, calculating a number of charging times when the battery was charged below the predetermined level after the last time the battery was charged at the predetermined level, and charging the battery with a second state of second charge setting when the calculated number of charging times equals a predetermined number. The apparatus includes a sensor for sensing the state of charge of the battery, a counter for counting the number of charging times that the battery was charged below a predetermined level after the last time the battery was charged to the predetermined level, and a charger for applying the second state of charge setting when the number of charging times counted by the counter equals the predetermined number.

REFERENCES:
patent: 5617009 (1997-04-01), Takao et al.
patent: 5819187 (1998-10-01), Sato et al.

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