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Automotive Engineering ›› 2025, Vol. 47 ›› Issue (6): 1048-1059.doi: 10.19562/j.chinasae.qcgc.2025.06.004

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Rapid Sorting of Retired Lithium-Ion Batteries by Integrating Clustering and Classification

Hanqing Tang1,Li Wang1,Mingqiang Lin2,Ji Wu1()   

  1. 1.School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009
    2.Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Jinjiang 362216
  • Received:2024-11-22 Revised:2024-12-20 Online:2025-06-25 Published:2025-06-20
  • Contact: Ji Wu E-mail:wu.ji@hfut.edu.cn

Abstract:

In order to improve the sorting efficiency of retired batteries and reduce data collection cost, to achieve a sorting effect close to complete data by using incomplete data, in this paper, a fast sorting method for retired batteries that integrates clustering and classification is proposed. Firstly, cluster analysis is conducted on complete data to preliminarily group the batteries, and the grouping results are used as battery labels. Secondly, the most valuable segments are selected from incomplete datasets, and a two-layer classification model is trained for classification fitting, thereby achieving rapid sorting of retired lithium-ion batteries. Finally, a validation experiment is conducted on 235 lithium-ion batteries, and the results show that the proposed method has a classification detection accuracy of 95.1% and significantly reduces the time required for sorting.

Key words: lithium-ion battery, retired batteries, battery sorting, clustering, electrochemical impedance spectroscopy