Electricity: battery or capacitor charging or discharging – Battery or cell charging – With detection of current or voltage amplitude
Reexamination Certificate
2006-04-04
2006-04-04
Tso, Edward H. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With detection of current or voltage amplitude
Reexamination Certificate
active
07023180
ABSTRACT:
In the case of charging by a charging apparatus having a plurality of input terminals to which external power sources for charging a secondary battery are inputted, it is prevented that a current of the inputted power source is outputted to the outside from the other input terminals for charging which are not used. If there are inputs from a plurality of input terminals, the input power sources are controlled so that the battery is optimally charged. pnp-type transistors Q1and Q2are arranged between two input terminals of a terminal11for an external power adaptor and a terminal12for a holder and a secondary battery E1,respectively. When a control IC13detects an input power voltage of one of the transistors, the transistor on the detected side is turned on. If the control IC13detects both input power voltages, a priority is allocated under predetermined conditions and the secondary battery E1is charged by the power source of the higher priority.
REFERENCES:
patent: 5384837 (1995-01-01), Fox
patent: 5969506 (1999-10-01), Neal
Nagai Tamiji
Yamamoto Tadahisa
Yamazaki Kazuo
Kananen Ronald P.
Tso Edward H.
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