Charging apparatus and charging method

Details Charging apparatus and charging method Charging apparatus and charging method

2005-10-18

2005-10-18

Tibbits, Pia (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With peak detection of current or voltage

C320S138000

Reexamination Certificate

active

06956357

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
patent: 6124700 (2000-09-01), Nagai et al.
patent: 6433443 (2002-08-01), Nishida et al.

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