We were intrigued to see this on the Bressay ferry. Looking up the idea of electric car fires, I found this. They say that these are chemical fires that "don't need oxygen". I think that means that they don't need oxygen from the air because there are oxidising agents in the battery that provide the oxygen. They talk of containment but not about being able to put the fire out completely. You'd think the sea water around a ferry would help but that can't be used because it would lead to a release of chlorine.
