Novel Sensing Techniques for Lithium-ion Battery Modeling and States Estimation

The increasing dependence on batteries calls for the accurate monitoring of battery functional status to increase their quality, reliability, and life. This has led to a variety of ingenious approaches developed over the years, among which the utilization of novel sensors is attracting increasing attention. Rather than summarizing all relevant previous work in novel sensing-based battery states monitoring, this paper selects noteworthy work that may suggest crucial future trends of applying novel sensing techniques to enhance the physics-guided functionalities in the battery management system. With ultrasonic sensors as an example, their working principles and general application in non-destructive detection are introduced. The ultrasonic evaluation for a commercial lithium-ion pouch cell is performed. The experiment results show that features from ultrasonic measurements could be potential parameters to determine the battery state-of-charge. The discussion presented herein is expected to induce a more fluent exchange of ideas and more intense interest in this emerging field. Future studies will present more on novel sensors and their benefits, drawbacks, possibilities and applications in battery domain.