Solid state battery technology is motivated by the desire to deliver flexible power storage in a safe and efficient manner. The increasingly widespread use of batteries from mass-production facilities highlights the need for a rapid and sensitive diagnostic for identifying battery defects. We demonstrate the use of atomic magnetometry to measure the magnetic fields around miniature solid-state battery cells. These fields encode information about battery manufacturing defects, state of charge, impurities, or can provide important insights into ageing processes. Compared with SQUID-based magnetometry, the availability of atomic magnetometers, however, highlights the possibility for a low-cost, portable, and flexible implementation of battery quality-control and characterization technology.
@article{arxiv.2010.02031,
title = {Rapid online solid-state battery diagnostics with optically pumped magnetometers},
author = {Yinan Hu and Geoffrey Z. Iwata and Lykourgos Bougas and John W. Blanchard and Arne Wickenbrock and Gerhard Jakob and Stephan Schwarz and Clemens Schwarzinger and Alexej Jerschow and Dmitry Budker},
journal= {arXiv preprint arXiv:2010.02031},
year = {2020}
}