期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 52, 期 12, 页码 3142-3154出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2017.2734902
关键词
Battery management; dc-dc converters; power integrated circuits; switched capacitor
资金
- National Science Foundation Division of Industrial Innovation and Partnerships [1542984]
- Division of Electrical, Communications and Cyber Systems [1407725, 1554265]
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1542984] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1407725, 1554265] Funding Source: National Science Foundation
This paper presents a small form factor dc-dc converter that can be used in a ladder architecture to provide state-of-charge equalization for large-scale lithium-ion arrays. A resonant switched-capacitor converter is implemented in a 180-nm bulk CMOS process that uses a merged-interleaving architecture to affect two-phase interleaving with only a single inductor. The approach has the advantage of reducing passive component volume for a given efficiency and voltage ripple constraint. A bidirectional current-mode control scheme is outlined that uses regulated zero-current switching and partial zero-voltage switching. The design also supports electrochemical diagnostic functions through a fully digital spectroscopic perturbation of cell current. Cell voltage and current are digitized through 10-b SAR analog to digital converters (ADCs), filtered and decimated for off-chip impedance extraction. The converter achieves 94.8% conversion efficiency in 1: 1 balancing mode with a total board area less than 1 cm(2), and supports bidirectional power transfer >3.7 W.
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