Method and apparatus for charging batteries using a converter

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging

Reexamination Certificate

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Reexamination Certificate

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07446503

ABSTRACT:
A method and apparatus for charging batteries includes using an input rectifier to receive an ac input and provide a dc signal. A converter receives the dc signal and provides a converter output. An output circuit receives the converter output and provides a battery charging signal. A controller preferably controls the converter to power factor correct. The system can include multiple output circuits, used either singly or at the same time, and designed for one or more voltages. They can be user removable. Preferably, the converter output has a magnitude independent of a range of frequencies and a range of magnitudes of the ac input, and the range can be, for example, at least a factor of two or at least two utility voltages. The controller includes a charging schedule module that receives feedback, such as voltage and/or current feedback and/or temperature feedback. The output circuit, such as a dc-dc converter, is controlled in response to the feedback in other embodiments. The battery type may be sensed or input by a user, and the charging done in response to the battery type. A defective battery sensor is preferably included, with a user-noticeable indicator.

REFERENCES:
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patent: 6160374 (2000-12-01), Hayes et al.
patent: 6236014 (2001-05-01), Ulrich
patent: 6329636 (2001-12-01), Geissler
patent: 6538909 (2003-03-01), Goodarzi et al.
patent: 6600292 (2003-07-01), James
patent: 2005/0285570 (2005-12-01), Kumar et al.
patent: 201 11 162 (2001-11-01), None
patent: 0 116 925 (1984-08-01), None
Model-Reference Adaptive-Control of a PFC-Equipped Battery-Charger, IECON'01: The 27thAnnual Conference of the IEEE Industrial Electronics Society , year 2000.

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