期刊
ELECTRONICS
卷 12, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/electronics12214521
关键词
battery equalizer; control strategy; multi-mode; energy transfer station; lithium-ion battery
This paper proposes a new multi-mode equalizer that addresses the issues of complex balancing strategy and poor balancing performance in traditional centralized equalizers. Experimental results demonstrate that the proposed equalizer achieves an efficiency of 81.7% in balancing battery strings.
The centralized equalizer has a good prospect in the mobile battery system due to its small size and light weight. However, equalizers with a centralized structure generally need a tricky balancing strategy and have an improbable balancing performance. This paper proposes an equalizer with multi-modes. It has a more straightforward balancing strategy than conventional equalizers with a centralized structure. This allows it to deal with the problem of inconsistency in a battery string more effectively without repeated actions of the switch matrix. Moreover, the merits of conventional equalizers with a centralized structure, such as being low-cost and compactness, remain in the proposed scheme. The operating principle, balancing strategy, and balancing efficiency are analyzed in detail. An experimental prototype for a battery string containing four cells is implemented after simulations. Experimental results validate that the proposed equalizer can balance a battery string with an efficiency of 81.7%.
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