Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 2, Pages 1816-1827Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3102627
Keywords
Equalizers; Batteries; Computer architecture; Microprocessors; Power electronics; Zero voltage switching; Complexity theory; Battery equalizers; battery management system (BMS); electric vehicles (EVs); LCC converter; zero-voltage switching (ZVS)
Categories
Funding
- National Natural Science Foundation of China [52077140]
- Shanghai Rising Star Program [20QA1406700]
Ask authors/readers for more resources
In this paper, a constant current string-to-cell battery equalizer with open-loop current control is proposed to effectively mitigate the inconsistency of battery strings. The equalizer achieves a constant balancing current with simple fixed-frequency open-loop control, and ensures zero-voltage switching among all MOSFETs during the equalization process. Experimental results validate the functionality and analysis of this equalizer, which exhibits a high efficiency, low components count, and obviously reduced control complexity compared with the conventional architecture.
Constant current equalization can effectively mitigate the inconsistency of battery strings in a fast manner. In this manuscript, a constant current string-to-cell battery equalizer with an open-loop current control is proposed. The equalization scheme is based on LCC multiresonant topology. It utilizes a common equalizer unit shared by each unbalanced cell to transfer energy from the entire string to a single cell. A constant balancing current is achieved with simple fixed-frequency open-loop control. The equalization speed is determined by the predesigned balancing current. Design considerations of the proposed equalizer are analyzed in detail, which ensure zero-voltage switching among all MOSFETs during the equalization process. An experimental platform to balance four lithium-ion battery cells is designed to verify the system performance. Experimental results validate the functionality and analysis of this equalizer. Compared with the conventional architecture, the proposed architecture exhibits a high efficiency, low components count, and obviously reduced control complexity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available