the4machin3
New Member
- Joined
- May 21, 2020
- Messages
- 22
While charging one cell is up to 3.9. Does this mean my bms isn’t working?
Is my BMS not working?
- Thread starter the4machin3
- Start date
While charging one cell is up to 3.9. Does this mean my bms isn’t working?
the4machin3
New Member
- Joined
- May 21, 2020
- Messages
- 22
It’s a Daly and I thought it was for lifepo4 - how could one tell, or set it up correctly?
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
DALY has several different BMS' and the BATTGO screen is moot other than it shows the Cell Voltages.
Please indicate which Model & Version of BMS and if it is a SmartBMS or Not, smart being one that has a user interface and is programable.
Also understand the vast majority of BMS' do not have ANY Balancing functions built-in default. Some BMS's have Passive Balancing which only discharges hi-volt cells whereas an Active Balancer will transfer power from Hi to Lo cells.
There are many Lithium Based Chemistries and their Charge/Discharge & Allowable voltage parameters all vary, so you have to make sure you have a BMS that is set to your chemistry. Lithium Iron Phosphate (LiFePo4) or otherwise shorthand "LFP" is presently the preferred Lithium Chemistry of storage systems.
Please indicate which Model & Version of BMS and if it is a SmartBMS or Not, smart being one that has a user interface and is programable.
Also understand the vast majority of BMS' do not have ANY Balancing functions built-in default. Some BMS's have Passive Balancing which only discharges hi-volt cells whereas an Active Balancer will transfer power from Hi to Lo cells.
There are many Lithium Based Chemistries and their Charge/Discharge & Allowable voltage parameters all vary, so you have to make sure you have a BMS that is set to your chemistry. Lithium Iron Phosphate (LiFePo4) or otherwise shorthand "LFP" is presently the preferred Lithium Chemistry of storage systems.
MisterSandals
Participation Medalist
And why/how are you charging LiFePO4 to 14.55V?
the4machin3
New Member
- Joined
- May 21, 2020
- Messages
- 22
Yikes. I thought 14.6 was full charge.
the4machin3
New Member
- Joined
- May 21, 2020
- Messages
- 22
I’ll have to double check the exact model, but it is Daly and it is not a smart model.
Bud Martin
Solar Wizard
- Joined
- Aug 27, 2020
- Messages
- 4,833
Did you also verify the Voltage on that cell with another Voltmeter?
Was it like this before or is this brand new setup?
Was it like this before or is this brand new setup?
the4machin3
New Member
- Joined
- May 21, 2020
- Messages
- 22
Yes, this is a new setup, and my first bank I made. I was in a rush today so I did not get a chance to verify with my voltmeter. The voltage dropped a lot after I unhooked it, and in other chargings it was a bit higher than the other three cells.
TorC
Solar Enthusiast
- Joined
- Jan 13, 2022
- Messages
- 514
If you didn't top balance before pack assembly, I'd have expected the BMS to cut before that one cell got so high, but aside from that it looks like ordinary SoC imbalance not yet corrected by the BMS balance. Top balance or at least help the low cells to protect the runner and check you don't have a shorted BMS.
Similar threads
