Charge controlling circuit, charge controlling method, and...

Details Charge controlling circuit, charge controlling method, and... Charge controlling circuit, charge controlling method, and...

2005-10-18

2009-06-02

Berhane, Adolf (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With thermal condition detection

C320S163000

Reexamination Certificate

active

07541780

ABSTRACT:
A charge controlling circuit is provided in which a temperature of a main body of a portable cellular phone or an ambient temperature thereof is detected by a temperature sensor and, when the temperature is higher than or equal to an lower limit in a proper temperature range required by the secondary battery and is lower than a specified reference value, a charging current having a first current value is fed to the secondary battery and, when the temperature is lower than or equal to an upper limit in a proper temperature range required by the secondary battery and is higher than or equal to the specified reference value, a charging current having a second current value being less than the first current value is fed to the secondary battery. When the temperature is a value outside of a proper temperature range required by the secondary battery, the charging to the secondary battery is stopped.

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patent: 2004-274871 (2004-09-01), None

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