Leaf Battery Bank

[EnoughToBeDangerous]

I've been contemplating making a 48v battery bank from Gen 1 or 2 Leaf batteries. The wiring is pretty straight forward, but what I'm not as familiar with is BMS and the battery chemistry. Seems that some don't use a BMS at all, and some use a 14S on each module bank. If you need a separate BMS on each module bank, that severely cuts into any cost savings of DIY. What is the consensus? Also, the modules I'm looking at are approx 50-65% capacity. Is there any information out there on approx cycles and calendar life remaining for modules that are at 50ish % capacity? Also, what's the safety like of the Leaf batteries? Haven't seen much concern with it, but I'm sure it's not as safe as LifePo. Thoughts? Thank you in advance

 

[crossy]

IIRC the Leaf is Li-ion hence the 14S BMS.

Sure as heck I wouldn't go the no BMS route, with second-life packs the cells could well be less-than-similar capacity wise, overcharge a Li-ion and ....

Even with a BMS I would have the packs well away from anything that might be damaged if it went "whoosh".