Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2004-08-10
2008-11-04
Tso, Edward (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
Reexamination Certificate
active
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.
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Model-Reference Adaptive-Control of a PFC-Equipped Battery-Charger, IECON'01: The 27thAnnual Conference of the IEEE Industrial Electronics Society , year 2000.
Reynolds Jon O.
Stanzel David A.
Corrigan George R.
Illinois Tool Works Inc.
Tso Edward
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