I've seen this effect with 100Ah cell stack. Compression was at least 2x on top with compressible foam sheets in between cells. Without compliant material between cells they must have been getting crushed at top corners. I also doubt that fuse started the fire. It could have blown as one cell stack developed internal short and sunk current via fuses from another battery stacks.
I’ve never seen milliohm or wattage specified for Class T.
I just happen to have a class T fuse and a 4 wire milliohm meter downstairs. I'll check the resistance in the morning to see what it says.
@Brett V do you happen to have a photo of this? I was thinking with something similar off the positive post.
Went to the garage and got a few shots. Hope this answers your question.
@Brett V , Perfect. Thank you. I have a Lynx power-in converted to use 58v 125amp mega fuses for my 100ah batteries. Want to add a layer of additional protection like this.
This makes me think: One cell leaked/shorted, the resulting fuse blow from excess current arced and ignited the gasses from the cell leak and that's what caused the fire, not the fuse itself.
On the positive side if that had been a lithium ion battery bank everyone would prob be dead from the intense fireball
It seems odd to see the black insulated wires coming from the fuse block. One other oddity I notice is the large washer on the second to bottom left lug. Though the battery failing due to leakage causing a short seems a more likely possibility.We may never know, but I see a lot of sloppy heat shrink on/under some of these lugs.
I am sorry for your loss. Just to clarify for other readers and emphasize what others have said, the cause of the fire was the arcing from the fuse not the LFP battery.
