Safety of Li Battery

This news is reported today because it's currently suspected that the fire was caused by Li battery inside the air monitoring equipment, even it is still under investigation. This makes me think of the Li battery safety certification issues I've recently encountered at work. Because it is required to self-charging the Li batteries inside our equipment continuously, we're planning to use ternary lithium batteries (NMC). Currenty, I am busy evaluating various certifications like UL 2580, UL2271, UL 62133-2, and IEC 62133-2.  I think they might have used the higher energy density ternary lithium battery (LiNiCoMnO2) instead of the lower energy density but safer lithium iron phosphate battery (LiFePO4).

Here's the news:

On April 14, 2025, a large fire occurred in Yangmingshan, Taipei. It's suspected that the lithium battery in the solar power module of an air quality sensor belonging to the National Center for High-performance Computing (NCHC) under the National Science and Technology Council caused it. The NCHC has removed 16 air quality sensors with built-in lithium batteries installed in Hsinchu City, Nantou County, Tainan City, and Chiayi County, and has strengthened its control measures. 
https://news.ltn.com.tw/news/politics/breakingnews/5053708 
https://news.pts.org.tw/article/752885

I did a quick check, and it seems they were using iAeris air quality monitoring equipment: https://www.niar.org.tw/xmdoc/cont?xsmsid=0I148622737263495777&sid=0P104624748119528484  https://www.sysinnotec.com/iaeris3

今天會刊出這個新聞，是因為目前懷疑是設備裡面的鋰電池造成失火，不過詳細結果還待後續偵辦確認。想到最近工作上遇到的鋰電池安全認證議題，由於是需要能持續自動充電的鋰電池，所以規劃使用三元鋰電池。最近正在努力評估 UL 2580、UL2271、UL62133-2、IEC62133-2 等不同的認證。我覺得他們是使用能量密度較高的三元鋰電池(NMC, LiNiCoMnO2)，沒有使用能量密度較低但安全性較高的磷酸鐵鋰電池(LiFePO4)。

新聞內容：

4/14/2025臺北市陽明山小油坑發生大火，懷疑是國科會旗下國網中心的空氣品質感測器中的太陽能供電模組的鋰電池所引起，國網中心已拆除安裝在新竹市、南投縣、台南市及嘉義縣的16支內建鋰電池的16支有鋰電池的空品感測器，並加強管控。
https://news.ltn.com.tw/news/politics/breakingnews/5053708https://news.pts.org.tw/article/752885

查了一下，他們是用 iAeris 的空品監測設備：
https://www.niar.org.tw/xmdoc/cont?xsmsid=0I148622737263495777&sid=0P104624748119528484
https://www.sysinnotec.com/iaeris3