Hey everyone, I’m trying to diagnose some weird stuff I’m noticing with my build as of late. Here’s some quick specs:
-12s4p 30Q
-Flipsky 6.6 dual
-Dual flipsky 6354 190kv motors
-16:60 gear ratio
VESC settings:
Motor current max: 65A
Motor regen max: -50A
Battery current max: 25A
Battery max regen: -16A
Cutoff settings (this used to be cutoff start at 40ish volts and cutoff end at 36V, adjusted the settings in hopes of being softer on the battery):
Cutoff start: 42A
Cutoff end: 37.5A
I put my AT tires (dickyho solid rubber 145mm tires, not honeycomb) on because I’m waiting for new belts to arrive for my street setup. I’ve noticed that the board’s performance seems to have declined considerably recently. Recently, when the charger shuts off, the battery’s voltage is usually no higher than 49v. Usually it would be 50v+ afterwards. I’ve tested this with both of my chargers and they both do the same thing, so I know it’s not a charger issue. So that’s a possible thing.
The board’s performance is quite degraded after only about 6 miles of riding, but from what I remember, when I had my AT setup on before I could usually get 12+ miles before performance started declining.
I’m wondering if my settings are inefficient somehow, or if my battery is messed up. I used to have my motor max at roughly 50A instead of 65A, if that makes a difference. A big question I’m wondering is how much voltage sag during acceleration is acceptable? I have a bluetooth module on my VESC so I get live telemetry, and on xmatic I saw that during acceleration (had already ridden for a lil bit) the voltage dropped from ~47V to ~42V. Haven’t kept much of an eye on this before, and obviously I know that the voltage dips when accelerating, just wondering if this amount is normal for this pack.
I don’t think I’ve put more than like 400 miles max on this board. Are these possibly symptoms of a dead P group, or some other issue? I had my pack built by Psychotiller, in the event that my pack is messed up does anyone know if he services batteries (I’d assume he does)? Or am I worrying about nothing here?
Apologies for any stupid questions, this is my first build and I’ve been learning some stuff as I go. Any help appreciated.