Battery Balancing with Resonant Converter
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United States of America Patent
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Nov 9, 2015
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Jun 3, 2013
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Abstract
A system and a method for charging of rechargeable batteries is presented. In particular, The charging of battery stacks comprising a plurality of battery cells or storage cells is presented. The system is configured to charge a first subset of storage cells from a storage comprising a serial arrangement of storage cells. The system comprises a driver circuit configured to generate an AC voltage comprising a frequency component at an AC frequency from an electric energy source at a DC voltage. Furthermore, the system comprises a first resonance circuit configured to amplify and/or attenuate the AC voltage as a function of the AC frequency, to yield a modified AC voltage. In addition, the system comprises a first rectifying unit configured to generate a modified DC voltage from the modified AC voltage, and configured to provide electric energy at the modified DC voltage to the first subset of storage cells.
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