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Automotive Engineering ›› 2024, Vol. 46 ›› Issue (4): 643-651.doi: 10.19562/j.chinasae.qcgc.2024.04.010

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Fast Clustering of Retired Lithium-ion Batteries Based on Adaptive Fuzzy C-means Algorithm

Lin Chen1,2,Manping He1,Shuxiao Wu1,Deqian Chen1,Mingsi Zhao1,Haihong Pan1()   

  1. 1.School of Mechanical Engineering, Guangxi University, Nanning 530004
    2.Guangxi Key Lab of Manufacturing System and Advanced Manufacturing Technology, Nanning 530004
  • Received:2023-07-20 Revised:2023-08-30 Online:2024-04-25 Published:2024-04-24
  • Contact: Haihong Pan E-mail:hustphh@163. com

Abstract:

The treatment of retired lithium-ion batteries (LiBs) by echelon utilization has great economic and environmental values, and how to sort and reconstitute decommissioned batteries retired LiBs efficiently and accurately is a prominent technical challenge in stepwise utilization. Firstly, to accurately reflect the consistency of retired batteries LiBs, the three factors of maximum available capacity (MAC), discharge ohmic internal resistance (DOIR) and Frechet distance (FD) of incremental capacity curve, are extracted together as clustering factors. Then the three clustering factors are combined with the adaptive fuzzy C-mean (AFCM) algorithm to construct a clustering method for retired batteries LiBs. The results show that the maximum error of MAC within the clustered clusters of the AFCM algorithm is 79 mAh with the DOIR less than 45 mΩ. The clustering method of the three factors into groups of batteries has better consistency; and the AFCM algorithm clustering takes the shortest time when 117 batteries are clustered.

Key words: decommissioned lithium batteries, echelon utilization, sorting and restructuring, machine learning