Research into an Efficient Energy Equalizer for Lithium-Ion Battery Packs

Hongrui Liu, Bo Li, Yixuan Guo, Chunfeng Du, Shilong Chen and Sizhao Lu
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Hongrui Liu: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Bo Li: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Yixuan Guo: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Chunfeng Du: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Shilong Chen: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Sizhao Lu: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China

Energies, 2018, vol. 11, issue 12, 1-11

Abstract: An efficient multi-mode energy equalizer for lithium-ion battery packs is proposed and energy balance strategies are studied in this paper. The energy balance strategies include the selection of the controlled object in the battery’s different working states and the current form of the controlled object. During the energy balancing process, the strongest single cell or the weakest single cell is selected as the controlled object according to the different working states of the battery, and the balanced current of the controlled object is continuous. Therefore, the energy equalizer proposed in this paper has a fast balancing speed, an improved balancing effect, and an excellent balancing reliability. According to the energy equalizer, the relevant experimental platform was built, and balance experiments in the battery’s different working states using a battery pack composed of four serially-connected lithium iron phosphate batteries were completed. Finally, the experimental results proved the effectiveness of the energy equalizer.

Keywords: equalizer; energy balance strategies; lithium iron phosphate batteries; balance experiment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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