Why would the wiring be on fire, that is what breakers and fuses are for. The only potential short that we do not control is inside the cel.
Johan
The number 1 cause of heat / fire in any electrical system is a bad connection.
Over time with heating, cooling and vibration and oxidation .... and even galvanic oxidation can cause a bad connection. Any time there is aluminum in electrical wiring, there is a greater chance of a bad connection developing over time. A bad connection + current flow = heat, and that can be run away heat that can cause a fire.
The thread Fhorst posted where his pack caught fire resulted in nothing but disagreement about what may have caused the fire .... given that we have never seen it happen before, I would have a hard time believing it was thermal runaway of a cell.
We had a situation once where a frequency drive we were controlling caught fire and almost burned the building down. Of course they tried to claim it was because we weren't controlling it properly .... which was ridiculous .... It was obvious that the main power terminals was where the fire started and it was a bad connection .... but we had to hire an expert to prove that to them.
There was a thread recently where a guy with a marine installation had a fuse holder melt down and he caught it just before it broke into flames.
People have intentionally mistreated these LFP cells and there is only the one situation I have seen where the cell was repeatedly stabbed with a metal object that a fire broke out one of the holes that had already been stabbed. That fire may very well have been caused by a spark from the metal object igniting the cell electrolyte that had already spilled out ......So, the cell itself just does not have a fire risk .... or a risk so low as to be almost insignificant ... in the case of LFP cells.
In the early days of this forum, there were opinions that there needed to be some circulation between cells, but as people have built more and more packs and observed pack temperatures under different circumstances, the general opinion has changed and this is generally not recommended any more.
Since we started getting an examining the EVE spec sheets, it has become apparent that controlling the compression of a pack is much more important over all.
I could see situations where the pack was always in a hot environment that the priority might change, because higher temperatures will also cause quicker degradation .... but, in that case, it would probably be better to figure out a way to control the environment.