Intermittent current interruption method for commercial lithium ion batteries aging characterization

TL;DR

This study introduces an efficient intermittent current interruption technique for aging characterization of commercial lithium-ion batteries, capable of tracking resistive and diffusive changes throughout the battery's lifetime with high repeatability.

Contribution

The paper presents a resource-efficient method that can replace electrochemical impedance spectroscopy for aging diagnostics in lithium-ion batteries, suitable for real-world applications.

Findings

Resistive and diffusive parameters increase with capacity fade.

Method achieves high repeatability and comparable accuracy to impedance spectroscopy.

Effective with low sampling frequency of 0.1 Hz.

Abstract

In this article, a pioneering study is presented where the intermittent current interruption method is used to characterize the aging behavior of commercial lithium ion batteries. With a very resource-efficient implementation, this method can track the battery resistive and diffusive behaviors over the entire state of charge range and be able to determine the aging throughout the lifetime of the batteries. In addition, the incremental capacity analysis can be carried out with the same data set. This method can provide measurement results with a high repeatability and produce equivalent information as the electrochemical impedance spectroscopy method. In this study, both the resistive and diffusive parameters increase with the battery capacity fading. This method does not require advanced test equipment and even with a 0.1 Hz sampling frequency, it is possible to extract usable parameters by prolonging the interruption length. Therefore, it has the potential to be easily implemented in the charging sequence in electric vehicles or stationary storage batteries for aging diagnostics.