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A multiphase quasi-resonant (QR) zero-current switching (ZCS) switched capacitor (SC) bidirectional dc–dc converter structure is proposed to reduce current ripple and switching loss, and significantly increase converter efficiency and power density. This approach provides a more precise output voltage to obtain voltage conversion ratios from the double-mode versus half-mode to -mode versus 1/ mode...
We use DSP to construct an intelligent Lithium-ion battery charging system. By adopting this intelligent charging system, we perform the data collection, calculation and peripheral circuit control for the battery charging status. According to the lithium-ion battery charging specifications, two hours are required for battery charging. A fuzzy controller constructed using the battery protection voltage...
A quasi-resonant zero current switching (QR ZCS) switch-capacitor (SC) converter for the cell voltage balancing control of a series connected battery string is presented in this paper. The proposed cell voltage equalizers (CVE) are designed to operate in the discontinuous-current mode (DCM) to achieve zero-current switching (ZCS) for reducing the switching loss in the bi-directional DC/DC converters...
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