RE:RE:Thermal Runaway
Ok, it wasn't the 2nd incident either. This is a very interesting article on what may have caused the 2019 event near Phoenix. https://spectrum.ieee.org/dispute-erupts-over-what-sparked-an-explosive-liion-energy-storage-accident and the detailed report https://www.aps.com/-/media/APS/APSCOM-PDFs/About/Our-Company/Newsroom/McMickenFinalTechnicalReport.ashx?la=en&hash=50335FB5098D9858BFD276C40FA54FCE provides technical details for those interested.
I wonders how one could ever deploy cells without thermal insulation against each other. Most reports I have read relate to NCM Li-Ion batteries. These have a very high energy density which is an unnecessary feature for stationary applications. It simply stems from the fact that many BESS batteries use the same cells that have been developed for mobile applications where NCM is a common chemistry, now rivaled by LFP mostly in non-high end EVs.