etuini
New Member
Newbie question... I'm building a 6s2p 12v 40ah pack from Toshiba 20ah LTO cells from Battery Hookup. So far, everything has gone well except for the BMS. I got an ANT bms and fried it within an hour or so. It wouldn't come on so I tried various things to activate it and given the smell it put off, I'm pretty sure I burned it out. I can order another one and be more careful, but I'm wondering if I actually need to. My understanding is that a BMS serves 4 functions:
Other than the additional redundancy a BMS would add, is there any reason that approach wouldn't work? Am I missing anything?
- High voltage disconnect
- Low voltage disconnect
- High/low temperature disconnect
- Cell balancing and/or disconnect if one cell gets too high
- High voltage disconnect: I have a Victron 75/30 charge controller programmed to disconnect the pack when it reaches 15.8 volts
- Low voltage disconnect: I have a Victron battery protector (https://www.amazon.com/gp/product/B01N6ATT8C) that will disconnect the pack when it reaches 12v
- I plan to have this outside in the winter, which is why I'm going with LTO cells (also, I just want to experiment with LTO cells). So temperature is not a factor.
Other than the additional redundancy a BMS would add, is there any reason that approach wouldn't work? Am I missing anything?