Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 20,059
I am going to charge the 4s battery to a maximum of 14.08V to maximize cycle life. Is it worth making 3.52v or 3.6v as the top balance?
What about BMS's overcharge setting, does it matter it is 14.08v or 14.60v?
You want to top balance once to a higher voltage. 3.65V is reasonable.
You want SCC to stop charging at a voltage below where BMS disconnects, and below what causes any cell to run up too high.
Maybe 3.6V per cell?
With SCC set to 14.08V, average 3.52 per cell.
Charging comes through the victron dc/dc converter where the set 14.08v.
But what about that top balance does it really matter if it's made of 3.52v or 3.6v?
If you top-balance to 3.52, then charge to (average) 3.52, i.e. 14.08V, some cells will diverge and run.