A thermodynamic approach for the rapid estimation of the remaining time to discharge in Li-ion batteries

Document Type

Article

Publication Date

10-1-2025

Abstract

An approach for rapid forecasting of the remaining discharge time (RDT) of Li-ion batteries is proposed, leveraging a degradation coefficient derived from the principles of irreversible thermodynamics. This coefficient establishes a linear relation between entropy generation and battery degradation during their discharge process. The efficiency of the proposed approach in determining RDT is experimentally demonstrated through the testing of 18,650 Li-ion batteries with varying capacities (0.5, 1.0, and 2.5 Ah) under different discharge rates. Additionally, the validation of the method is further extended using published data from 14,500 polymer and battery pack-type Li-ion batteries discharged at various rates, as well as 18,650 Li-ion batteries evaluated at different discharge cycle conditions. Across all tested scenarios, the proposed method consistently forecasts battery capacity during a single discharge with an error margin of less than 8%. Finally, the advantages of the proposed procedure over the empirical approach in determining the RDT for batteries having different capacities are established. The key advantage of the proposed approach is its reliance on easily measurable parameters—including discharge current, voltage, and surface temperature—making it a practical and efficient solution for real-time battery life estimation.

Publication Source (Journal or Book title)

Sustainable Energy Technologies and Assessments

This document is currently not available here.

Share

COinS