CO2 or a carbonate seems to be key. Lithium ion batteries are like semtex or rocket fuel, their weakness is they cant be dispersed easily due to their solid co

CO2 or a carbonate seems to be key. Lithium ion batteries are like semtex or rocket fuel, their weakness is they cant be dispersed easily due to their solid compact nature unlike petrol or diesel or gas vapours which can all be dispersed easily, typically with water, and to transfer heat. A hose that produces a fine mist of water has water droplets with greater surface area with less volume of water which then enables the heat to be absorbed by the water. So the problem seems to be dispersing or containing the reaction to limit damage.