shanemgrey
New Member
- Joined
- May 17, 2020
- Messages
- 24
I bought 32 grade b 280 ah lifepo4 cells to make a 2P16S bank. But 2 of the cells had damaged posts and I don't want to use them. 2 others looked like they were used, so I don't really want to use them either.
I also have 8 304 cells from another distributer. They are the same physical height as the 280s.
I am using 2 of the JKBMS active balancing BMSs at 200amp rating each.
I think I can add 4 of the 304 cells to the 12 280 cells to make the second 16s battery.
My understanding is that the larger capacity cells would just end up top balancing with the rest of them, and when drawn down, if any of the 280 cells goes under voltage before the 304s, the BMS would cut off the battery discharge. No harm to the 304 cells, nor any of the 12 280 cells.
I think that this setup would act exactly the same as a full 280ah battery. Essentially the 304ah extra capacity is just being wasted, but not harming anything.
Am I wrong with any of this? If so, what are the downsides to mixing in this way?
I also have 8 304 cells from another distributer. They are the same physical height as the 280s.
I am using 2 of the JKBMS active balancing BMSs at 200amp rating each.
I think I can add 4 of the 304 cells to the 12 280 cells to make the second 16s battery.
My understanding is that the larger capacity cells would just end up top balancing with the rest of them, and when drawn down, if any of the 280 cells goes under voltage before the 304s, the BMS would cut off the battery discharge. No harm to the 304 cells, nor any of the 12 280 cells.
I think that this setup would act exactly the same as a full 280ah battery. Essentially the 304ah extra capacity is just being wasted, but not harming anything.
Am I wrong with any of this? If so, what are the downsides to mixing in this way?