We all want to prevent a fire from happening, but that is not always the case. There are plenty of threads on battery building safety etc. So I wanted to talk about what is the best and or most practical way to subdue a lithium battery fire. and prevent further loss of property or worse.
Lion or lipo, they both burn pretty similar. They create their own oxidiser so they are almost impossible to put out, also the heat can travel from cell to cell creating a slow traveling chain reaction that will not stop burning until all the cells are burnt out.
The other reason I am starting this topic is there seems to be some confusion about what to use to put out these fires. Most people saying you need a special type of fire extinguisher, but many experts saying using lots of water is the best way. This is to reduce the temperature and prevent the fire spreading. Its not really to put out the battery fire.
The special fire extinguisher people talk about is a class D which is a for lithium metal fires, our batteries do not contain solid metal lithium so a class D should not be used. Lithium battery fires are a considered a flammable liquid fire (B class) and can be extinguished with normal ABC extinguishers. From my reading the most ideal is a class B foaming type.
Also its not like anyone is going to be carrying a huge fire extinguisher in their back pack! So what are the practical alternatives?
I use my board to commute and one of my biggest fears is that it spontaneously starts to combust while I’m on the train. I have considered carrying one of these fire blankets which I could throw over the board to somewhat contain a fire.
I have also considered carrying a bag of sand or a bag of bi-carbonate soda. What you guys think about my ideas for back pack extinguishers?