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Study of the characteristics of battery packs in electric vehicles with parallel-connected lithium-ion battery cells

descriptionPublicationkeyboard_double_arrow_right Conference object , Article , Journal 01 Mar 2014Publisher:IEEEJournal:2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014

Authors: Xianzhi Gong; Chunting Chris Mi; Rui Xiong;

doi: 10.1109/apec.2014.6803766 , 10.1109/tia.2014.2345951

Study of the characteristics of battery packs in electric vehicles with parallel-connected lithium-ion battery cells

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Abstract

This paper studies the characteristics of battery packs with parallel-connected lithium-ion battery (LiB) cells. To investigate the influence of the cell inconsistency problem in parallel-connected cells, a group of different degraded LiB cells were selected to build various battery packs and test them using a battery test bench. The physical model was developed to simulate the operation of the parallel-connected packs. The experimental results and simulation indicate that, with different degraded cells in parallel, there could be capacity loss and large difference in discharge current, which may cause further accelerated degradation and a more serious inconsistency problem.

Related Organizations

University of Michigan–Flint
United States
Beijing Institute of Technology
China (People's Republic of)
Beijing Institute of Technology
China (People's Republic of)

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