Adaptive interleaved control equalization for lithium-ion battery packs based on three-winding transformers

doi:10.19799/j.cnki.2095-4239.2022.0004

Abstract

Abstract:

To address the problem of voltage inconsistency in lithium-ion (Li-ion) battery packs, caused by differences in the manufacturing processes of individual cells, an equalization scheme is proposed that can realize multiple equalization types. The scheme consists of an active equalization topology, based on a three-winding transformer, and a corresponding adaptive interleaving control strategy, which can control the flexible transfer of energy between different equalization objects. The circuit can also make real-time adjustments according to battery pack condition, always ensuring the optimal state to achieve fast equalization of the battery pack. Finally, the proposed equalization scheme effectively solves the voltage inconsistency issue and achieves high-speed equalization from simulation.

Key words: Li-ion battery pack, three-winding transformer, multiple equalization types, active equalization, adaptive interleaving control

CLC Number:

TM 911

Zheng ZHENG, Xiaoshuai WANG, Bin LI, Tao HUANG, Peike LI. Adaptive interleaved control equalization for lithium-ion battery packs based on three-winding transformers[J]. Energy Storage Science and Technology, 2022, 11(4): 1131-1140.

Figures/Tables 12

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