Daly BMS gone crazy..Update Opinions
I was charging my 120ah lifepo4 battery yesterday and came in for lunch and saw it shut down..I figured it hit the 3.65 volt cell limit and shut down,I went out to check it and saw this on the Blueto...
Forum Discussion
jaycocreek wrote:
Is it safe just to let the BMS just shut it down when it's charging?..
Not really knowing much about the BMS yet other than watching Will test them for low temp cut off and quite a few not shutting down in his test..
If it is safe,that's an easy way to know when it's full..
Welcome to LFP’s...
First off, your battery was EXPENSIVE Right??.... So you need to invest in a SOC (State Of Charge) meter that is designed to accurately translate LiFePo4’s SOC...Your bluetooth may provide this (??)...(If not, check-out Victron’s BMV 712, or equivalent)...
Routinely charging to 100% SOC is not necessary except to occasionally allow for BMS cell-balancing...(restores the cells to near-equal values).
With a ‘capable SOC LFP meter’ readout, once the batt gets to 100% SOC, after a brief ‘hold period’ you’ll begin to see the BMS doing it’s work - a kinda ‘to-and-fro’ repeating dance where voltage drops off a bit while current rises a bit until after about 15-20 min current holds at zero and voltage remains fixed at say 14.x...This scenario is with no other power draws the battery.
Beyond this, it’s not beneficial to let the battery remain for an extended period on an active charging source, and during longer periods of non-use, it’s best to deplete the SOC and store at an approx. 50’ish % or so SOC.
For a drop-in, this is about ALL the ‘expert’ you’ll ever need to be...
3 tons
