Lipo repair

[himalaya]

Here are some curves to make things clear.



Have a zoom in look


there are two groups of curves, cell 1/4/6 (brown/pink/dark blue) presents far higher voltage under 7A charge current, unless during charge pause period they get close. The "spikes" are 3 second charge pause every minute, you can see the "bad" cells have huge spikes compared to the good cells, reflecting much higher internal resistance.

Now the discharge characterestics, same result, the bad cells have large voltage drop under only 3.2A discharge current. the good cells(red/yellowgreen/light blue) have smoooooth curve(low voltage change when current varies) and are very close from each other, while the bad group are full of glithes and far apart front the good.

[lincpimp]

Well, it certainly seems like those 3 cells are not performing very well. You should not have that much variance between cells. I doubt that they will do very well during a run... Not sure what to tell you to do, can you send the pack back?

[himalaya]

Originally Posted by lincpimp

Well, it certainly seems like those 3 cells are not performing very well. You should not have that much variance between cells. I doubt that they will do very well during a run... Not sure what to tell you to do, can you send the pack back?

Sending it back seems the only way to go, otherwise I may have to take it apart to reform a good 3S pack.
Thanks Linc