An Incremental Capacity Parametric Model Based on Logistic Equations for Battery State Estimation and Monitoring
Language
EN
Article de revue
This item was published in
Batteries. 2022-04, vol. 8, n° 5, p. 39
English Abstract
An incremental capacity parametric model for batteries is proposed. The model is based on Verhulst’s logistic equations and distributions in order to describe incremental capacity peaks. The model performance is compared ...Read more >
An incremental capacity parametric model for batteries is proposed. The model is based on Verhulst’s logistic equations and distributions in order to describe incremental capacity peaks. The model performance is compared with polynomial models and is demonstrated on a commercial lithium-ion cell. Experimental data features low-current discharges performed at temperatures ranging from −20 °C to 55 °C. The results demonstrate several advantages of the model compared to empirical models. The proposed model enables a clear description of the geometric features of incremental capacity peaks. It also doubles as an open circuit voltage model as the voltage curve can be fully recovered from parameterization on incremental capacity curves. The study of temperature sensitivity show that peak geometric parameters can be modelled as a function of temperature. An example of practical application is then displayed by using the model to estimate battery state-of-charge from voltage and temperature measurements. This example can expand to other practical applications for battery management systems such as state-of-health monitoring.Read less <
English Keywords
lithium-ion batteries
battery management system
incremental capacity
parametric model
temperature sensitivity
OCV model
SoC estimation
SoH monitoring