Charging apparatus and charging method

Details Charging apparatus and charging method Charging apparatus and charging method

2006-04-04

2006-04-04

Sparks, Donald (Department: 2187)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With thermal condition detection

C320S150000

Reexamination Certificate

active

07023179

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

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