ruiz.manuel94
New Member
- Joined
- Nov 16, 2021
- Messages
- 22
So I noticed my BMS is having a strange behaviour when the battery reaches full charge and there is strong sunlight.
My BMS is set to stop charge current if a cell goes above 3.6V or the battery voltage goes over 14.4V
So what happens is that when either of those things happen (it is the 3.6V single cell since my cells are slightly out of balance) the charging stops. However since the MPPT charger is effectively disconnected from the battery, suddenly the cell voltage drops below 3.6V, opening the battery for charge again. This results in a cycle in the charge MOS of my BMS.
I am wondering two things:
-Is this bad for my battery?
-Is there any way to avoid this? maybe shut off the limit in the BMS since the MPPT has protection anyway
My battery is a DIY LiFePO4 12V four cell and my charger is 40A SRNE MPPT (same as WEIZE)
My BMS is set to stop charge current if a cell goes above 3.6V or the battery voltage goes over 14.4V
So what happens is that when either of those things happen (it is the 3.6V single cell since my cells are slightly out of balance) the charging stops. However since the MPPT charger is effectively disconnected from the battery, suddenly the cell voltage drops below 3.6V, opening the battery for charge again. This results in a cycle in the charge MOS of my BMS.
I am wondering two things:
-Is this bad for my battery?
-Is there any way to avoid this? maybe shut off the limit in the BMS since the MPPT has protection anyway
My battery is a DIY LiFePO4 12V four cell and my charger is 40A SRNE MPPT (same as WEIZE)