Experimental Analysis of Lithium-ion Battery Degradation with Varying Discharge Rates  
Author Rui Wang


Co-Author(s) Mengmeng Zhu


Abstract Lithium-ion batteries are widely used in consumer electronics. The battery degradation is influenced by many factors, such as temperature and discharge rate. This study provides a thorough investigation of battery degradation characteristics with different discharge rates. In-lab experimental tests on Lithium-ion batteries under various discharge rates are conducted to collect data, which include capacity, voltage, and current in charge and discharge cycles. Visualization from experimental data shows a variety of degradation patterns, which reveals the impact of different discharge rates on battery degradation. Further, we apply two types of regression models to capture the dynamics and variations of Peukert's law coefficient of different batteries. Then, the estimated Peukert's law coefficient is utilized to predict battery capacity degradation and remaining useful life.


Keywords Discharge current rates, Peukert's law, autoregressive, regression.
    Article #:  RQD28-37

Proceedings of 28th ISSAT International Conference on Reliability & Quality in Design
August 3-5, 2023