Research on group methods of second-use Li-ion batteries based on k-means clustering model

摘要

Aiming at the fact that the weeded out car batteries are with bad consistency of capacity and internal resistance, screening and grouping must be adopted to second-use them. This paper determines the characteristic indexes for screening and grouping by analyzing the inconsistency of the second-use batteries and figures out the weighted value of each characteristic index. By grouping the second-use batteries based on the k-means clustering model, batteries are with preferable consistency and also, they have high capacity utilization ratio.