Okay. That makes sense. And for protection from shorted cell runaway, relying on 5a fuse wire will keep it safe?
I dont believe I would actually have 100ah from a 20p arrangement, though. I seriously doubt that the cells are actually 5ah like they say. I would be quite content if they consistently test in the neighborhood of 2ah. I would probably be looking at 12s 50p or maybe 13s 50p.
---In electricboats@yahoogroups.com, <matwete@...> wrote :
King o'NO -
You definitely don't want to wire these up as parallel groups of series cells. Sure, it'd be safer from a shorted cell standpoint, but from a cell monitoring standpoint, you'd have to monitor each and every cell individually. By instead wiring 20 cells, say, in parallel, you only need to cell monitor each group of 20 cells. So, if you were going with a 12S(20P) arrangement, you'd have 100ah @ 31-48v or so and only have a BMS that monitors the 12 clusters. That's how the pros do it (e.g. Tesla).
-MT
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