Assessment of residual capacity in large-scale retired electric vehicle batteries: scientific questions and methods

The development of new energy vehicles has rapidly expanded the downstream industry, which is power battery recycling and utilization. The determination of residual capacity in retired power batteries is crucial for pricing battery recycling and hierarchical utilization. This paper focuses on the "economy-accuracy-fairness" coupled interactive mechanism required for assessing the residual capacity of large-scale retired electric vehicle batteries. It proposes scientific questions and a methodology for evaluating the residual capacity of retired batteries on a large scale. Based on this, mathematical models are established from three aspects: the economy, accuracy, and fairness of residual capacity assessment. Finally, a summary and outlook are provided regarding the technical challenges and innovative applications in the assessment of residual capacity in retired power batteries.