pomah
10 W
Hi guys, I recently built my first battery but it seems I have run into some balancing issues.
I have built using N.E.S.E modules so it is possible to reassemble it if needed, but now to my issue.
LG INR21700-M50LT cells
13s3p pack
Cells bought in december, pack assembled back then but it has been waiting for the bike until now (May)
After first charge up the final voltage was 52,12V, battery seems to function for my purpose, 1kW ebike.
After inspection I found two of the series groups to be at 4,15V and the rest to be at around 3,98V, so the pack is not balanced, or?
The bms is connected and the pack is charged over the bms, but I guess it for some reason can not balance the whole pack? But it does cut of the charge so it is alive.
So at this stage I am a bit confused and would love for some hands on tips. Thank you for your time.
I have built using N.E.S.E modules so it is possible to reassemble it if needed, but now to my issue.
LG INR21700-M50LT cells
13s3p pack
Cells bought in december, pack assembled back then but it has been waiting for the bike until now (May)
After first charge up the final voltage was 52,12V, battery seems to function for my purpose, 1kW ebike.
After inspection I found two of the series groups to be at 4,15V and the rest to be at around 3,98V, so the pack is not balanced, or?
The bms is connected and the pack is charged over the bms, but I guess it for some reason can not balance the whole pack? But it does cut of the charge so it is alive.
So at this stage I am a bit confused and would love for some hands on tips. Thank you for your time.