Apparatus and method for sensing attachment or detachment of...

Details Apparatus and method for sensing attachment or detachment of... Apparatus and method for sensing attachment or detachment of...

2007-09-26

2010-11-16

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

One cell or battery charges another

C320S128000

Reexamination Certificate

active

07834581

ABSTRACT:
A method for sensing detachment of a external battery in a portable terminal including a connector with which the external battery is detachably assembled includes determining that the external battery is assembled with the connector when an output voltage is observed, connecting the connector and an internal battery of the portable terminal to supply power from the external battery to the internal battery, disconnecting the connector from the internal battery to check an output voltage of the connector, and determining that the external battery has been detached from the connector when an output voltage is not observed.

REFERENCES:
patent: 5200685 (1993-04-01), Sakamoto
patent: 6191552 (2001-02-01), Kates et al.
patent: 6392383 (2002-05-01), Takimoto et al.
patent: 2006/0279250 (2006-12-01), Keely et al.
patent: 2008/0106232 (2008-05-01), Idzik et al.

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