Maast
Compulsive Tinkerer
Just saw a post on the DIY battery facebook group about adding cells in parallel with individual weak cells in the BYD modules to correct for them not being up to par.
I'm thinking its a pretty good idea. There'd be a good bit of trial-and-error with adding a cell, cycling it to see the results, adding/removing cells based on that result, and cycling again, rinse and repeat.
I don't see any downsides to it other than the man-hours involved. Add cells to correct for gross capacity mismatch and let a BMS correct for minor mismatches. Sounds like it'd work a lot better than just a active BMS.
18650s are 1-3.6AH and headways are 8AH but I'm sure there a million other LFP cell capacities.
I'm thinking its a pretty good idea. There'd be a good bit of trial-and-error with adding a cell, cycling it to see the results, adding/removing cells based on that result, and cycling again, rinse and repeat.
I don't see any downsides to it other than the man-hours involved. Add cells to correct for gross capacity mismatch and let a BMS correct for minor mismatches. Sounds like it'd work a lot better than just a active BMS.
18650s are 1-3.6AH and headways are 8AH but I'm sure there a million other LFP cell capacities.