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A Modularized Voltage Equalizer Based on Phase-Shift Modulation for Series-Connected Battery Strings
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DOI：10.1109/TIE.2023.3239851.png)
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摘要
En 中文
The modular design can effectively improve the circuit extensibility and control flexibility of equalizers for long series-connected battery strings. This article proposes a modular battery equalizer based on phase-shift modulation. The LC resonant converters with synchronous rectification are employed as the automatic cell-level equalizer to realize any-cells-to-any-cells (AC2AC) equalization and soft-switching operation, which enhances the balancing speed and efficiency. Different cell-level equalizers are connected with auxiliary windings. The fast equalization between modules is achieved by adjusting the phase shift of driving signals applying for the cell-level equalizers. A prototype with three modules, each consisting of three series cells, is built and tested. Experimental and comparative results confirm the validity and characteristics of the proposed modular equalizer.
Keyword:
Battery equalizer
modularization
multi active-bridge converter
multiwinding transformer
期刊
IF:
7.2
论文数:
1.8W
被引数:
9.8W
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