{"id":47252,"date":"2022-11-08T21:28:05","date_gmt":"2022-11-08T21:28:05","guid":{"rendered":"https:\/\/freeflysystems.com\/?post_type=kb_article&#038;p=47252"},"modified":"2022-11-08T21:28:05","modified_gmt":"2022-11-08T21:28:05","slug":"sb001-super-light-battery-sl8-battery-incident","status":"publish","type":"kb_article","link":"https:\/\/freeflysystems.com\/knowledge-base\/sb001-super-light-battery-sl8-battery-incident","title":{"rendered":"SB001 Super Light Battery &#8211; SL8 Battery Incident"},"content":{"rendered":"<p><strong>Date Released:<\/strong><span style=\"font-weight: 400;\"> November 8th, 2022<\/span><\/p>\n<p><strong>Subject:<\/strong><span style=\"font-weight: 400;\"> SL8 Battery Incident<\/span><\/p>\n<p><strong>Effectivity:<\/strong><span style=\"font-weight: 400;\"> Immediate<\/span><\/p>\n<p><strong>Required Action:<\/strong><span style=\"font-weight: 400;\"><strong>\u00a0<\/strong> None at this time &#8211; Alert<\/span><\/p>\n<p><strong>INTRODUCTION<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Freefly recently had an SL8 battery fire at our East Coast office. The root cause of the fire is unclear at this time and Freefly is investigating with maximum urgency. While we discover the root cause of this issue we are asking users to be diligent about storing batteries safely and letting Freefly know if any abnormal function is observed with SL4 or SL8 batteries.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As of now, there are no required actions and customers are advised to continue normal SL4 \/ SL8 \/ Astro operations with extra attention paid to any battery faults.<\/span><\/p>\n<p><strong>BACKGROUND<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">This is the context for the incident:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This was a production SL8 Air battery that had been flown and charged several times<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The battery was fully charged and put away for storage<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The fire originated on the BMS PCBA and not from the Lithium-Ion cells themselves<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The heat caused a few of the cells to vent but the fire did not catastrophically spread through all the battery cells<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">We have over 5000 hours of flight time on more than 1000 SL8 batteries (our test fleet plus shipping fleet) and this is the first issue of this type we have encountered<\/span><\/li>\n<\/ul>\n<p><strong>DISCUSSION<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">There are a few potential root causes we are investigating:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Overvoltage incident causing a component to fail and short the pack causing BMS to catch on fire<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">From Astro or accessories<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">From manufacturing<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">From charging<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cell balance circuit failure or balance wire short circuit<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Manufacturing error or defect in a PCBA<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Random and catastrophic failure of key component (TVS Diode, Regulator, etc)<\/span><\/li>\n<\/ul>\n<p><strong>RECOMMENDATION<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">At this time, there is no immediate action required from our customers.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you have any abnormal battery behavior during use, charging, or storage, please contact Freefly Support to provide information on the issue. As always, use best practices when charging and handling batteries.\u00a0 And store them in a safe place, away from living spaces and flammable materials.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Next Steps: Freefly will provide an update to this Service Bulletin by 11\/14. We will follow up with all SL8 \/ SL4 \/ Astro customers on our investigation findings and all required customer actions that come from our investigation.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For Service Information Contact Freefly Support: <\/span><span style=\"font-weight: 400;\">Support@freeflysystems.com<\/span> <a href=\"https:\/\/freeflysystems.com\/support\"><span style=\"font-weight: 400;\">https:\/\/freeflysystems.com\/support<\/span><\/a><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n","protected":false},"template":"","class_list":["post-47252","kb_article","type-kb_article","status-publish","hentry","support_category-power-systems","support_category-power-systems-service-bulletins"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SB001 Super Light Battery - SL8 Battery Incident - Freefly Systems<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/freeflysystems.com\/knowledge-base\/sb001-super-light-battery-sl8-battery-incident\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SB001 Super Light Battery - SL8 Battery Incident\" \/>\n<meta property=\"og:description\" content=\"Date Released: November 8th, 2022 Subject: SL8 Battery Incident Effectivity: Immediate Required Action:\u00a0 None at this time &#8211; Alert INTRODUCTION Freefly recently had an SL8 battery fire at our East Coast office. 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