sunrise
New Member
- Joined
- Jul 16, 2020
- Messages
- 206
My DIY batteries are out of balance (I have top balanced using the guide in this forum before I put them in use), one cell hit 3.65v (overvoltage cutoff) while other cells are around 3.36v. during charging I did see [BLANCING] on the cell with higher voltage, but I think the bms passive balancing just can't keep up with charging current.
My cells are strapped together with some very strong fiberglass reinforced tape and placed in a very compact enclosure. take them out and rewire to top balance again can be super time consuming.
I am wondering when cells are around 3.2v - 3.3v, if I can hookup a desktop power supply, limit the current to 0.5a and set voltage to 13.8v, and use this to charge the cells, would this give the passive balancing enough time to bring cells balanced?
I also read that I can use a load resister to 'bleed' the high voltage cells, I might try that if the desktop PS thing doesn't work.
My cells are strapped together with some very strong fiberglass reinforced tape and placed in a very compact enclosure. take them out and rewire to top balance again can be super time consuming.
I am wondering when cells are around 3.2v - 3.3v, if I can hookup a desktop power supply, limit the current to 0.5a and set voltage to 13.8v, and use this to charge the cells, would this give the passive balancing enough time to bring cells balanced?
I also read that I can use a load resister to 'bleed' the high voltage cells, I might try that if the desktop PS thing doesn't work.