{"id":914,"date":"2019-11-12T12:29:35","date_gmt":"2019-11-12T12:29:35","guid":{"rendered":"https:\/\/budker.uni-mainz.de\/?page_id=914"},"modified":"2019-11-12T12:30:05","modified_gmt":"2019-11-12T12:30:05","slug":"looking-into-batteries-with-magnetometers","status":"publish","type":"page","link":"https:\/\/budker.uni-mainz.de\/?page_id=914","title":{"rendered":"Looking into batteries with magnetometers"},"content":{"rendered":"\n<p>In the rapidly developing field of battery technology, is it desirable to perform diagnostics on battery cells by non-destructive and non-contact measurements. We demonstrate the use of atomic magnetometry to detect states of battery charge [1]. We do so by creating a map of the weak induced magnetic fields around a commercial Li-ion battery cell as a function of its state of charge. We also study the effect of mechanical defects in the battery on its internal currents and magnetic susceptibility. The high sensitivity&nbsp;afforded by the system also revealed minute-scale weak transient internal currents that persist after discharging.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"346\" src=\"https:\/\/budker.uni-mainz.de\/wp-content\/uploads\/2019\/11\/Fig3_updates-1024x346.png\" alt=\"\" class=\"wp-image-915\" srcset=\"https:\/\/budker.uni-mainz.de\/wp-content\/uploads\/2019\/11\/Fig3_updates.png 1024w, https:\/\/budker.uni-mainz.de\/wp-content\/uploads\/2019\/11\/Fig3_updates-300x101.png 300w, https:\/\/budker.uni-mainz.de\/wp-content\/uploads\/2019\/11\/Fig3_updates-768x260.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Reference:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[1] Yinan Hu, Geoffrey Z. Iwata, Mohaddese Mohammadi, Emilia V. Silletta, Arne Wickenbrock, John W. Blanchard, Dmitry Budker, and Alexej Jerschow, Battery Diagnostics with Sensitive Magnetometry, <a aria-label=\"arXiv:1905.12507 (opens in a new tab)\" href=\"https:\/\/arxiv.org\/abs\/1905.12507\" target=\"_blank\" rel=\"noreferrer noopener\">arXiv:1905.12507<\/a> (2019).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the rapidly developing field of battery technology, is it desirable to perform diagnostics on battery cells by non-destructive and non-contact measurements. We demonstrate the use of atomic magnetometry to detect states of battery charge [1]. We do so by creating a map of the weak induced magnetic fields around a commercial Li-ion battery cell [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":5,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-914","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/pages\/914","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=914"}],"version-history":[{"count":2,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/pages\/914\/revisions"}],"predecessor-version":[{"id":917,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/pages\/914\/revisions\/917"}],"up":[{"embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/pages\/5"}],"wp:attachment":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}