Dielectric elastomer sensors adapted for monitoring compression load of clamped battery cells

Johannes Ziegler; Detlev Uhl; Holger Böse

doi:10.1117/12.2658246

28 April 2023 Dielectric elastomer sensors adapted for monitoring compression load of clamped battery cells

Johannes Ziegler, Detlev Uhl, Holger Böse

Proceedings Volume 12482, Electroactive Polymer Actuators and Devices (EAPAD) XXV; 124820J (2023) https://doi.org/10.1117/12.2658246
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

Condition monitoring of Li-ion cells in battery packs for electric vehicles is becoming increasingly important, not only in terms of safety, but also with respect to predictive maintenance and recycling applications of the battery. Parameters already monitored by the battery management system are the pack temperature and electrical properties such as cell voltage and current flow. The compression load in a stacked battery pack, which changes not only during charging and discharging but also during aging, would provide valuable information about the health condition of the cell. This work shows the development of a dielectric elastomer sensor (DES) system especially adapted for monitoring the compression load of clamped Li-ion cells. By attaching special elastomer-based structures on both sides of an elastomer film, a thin and soft compression load sensor is realized. Various sensor configurations were investigated in order to increase the sensor performance in the required pressure range of the battery cell. The sensor design was varied by using different structures or by modifying the elastomer material or the electrodes of the intermediate elastomer film. The sensor characterization was performed by applying a controlled compression load and simultaneously recording the capacitance signals of the sensor. First cycling experiments using a sensor array in a clamped setup with the battery cell showed that the sensor capacitance depends on the compression load as the cell is charged and discharged. This result demonstrates the great potential in the field of condition monitoring of Li-ion battery cells.

Conference Presentation

Citation Download Citation

Johannes Ziegler, Detlev Uhl, and Holger Böse "Dielectric elastomer sensors adapted for monitoring compression load of clamped battery cells", Proc. SPIE 12482, Electroactive Polymer Actuators and Devices (EAPAD) XXV, 124820J (28 April 2023); https://doi.org/10.1117/12.2658246

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available