Yes all the rest of the things you can leave the same, 12s voltage cut offs should be around 40v for start and 36v end
Here’s some videos that help me out if you type in Vesc tool YouTube you get a lot of stuff
Awesome thanks for all the help guys, I didn’t wanna blow anything so I appreciate it
not sure if this helps but these should be the specs on the cells
VOLTAGE : 3.7V
CAPACITY: 4800MAH
DISCHARGE : 10-15A CONTINUOUS
Per cell? Or pack? How many cells are in a 12s4p?48??
@Skyart thank you! That was more helpful than an hour of vesc how-to on youtube. Since many have a 12s4p 21700 P42 w a dual 6374 motors and use the PC vesc tool I want to make sure I’m halving the right numbers. These are the values you would enter:
- motor max current: 80 (range: 70 to 90) adjust for low speed torque
- motor curr max break: -65 (range:-60 to -70) adjust for low speed break
- battery current max: 50 (battery max continuous 100A divided by 2)
- battery current max regen: 16 (max charge current 8A * 4p = 32 divided by 2)
- voltage cuttoff start: 40
- voltage cuttof end: 36
- ERPM: leave limit at 100,000 or change?
Save and then repeat for other side
This is all correct
For battery current max regen you can set it higher tho. If you feel you need more high speed breaking I would increase it.
@Call-me-krampus don’t run that pack anywhere near 96 battery amps. That’s complete bullshit. The Panasonic/Tesla cell packs should only be ran at 10 amps per cell or else they’ll sag to the floor and get damaged over time. Per side set 20 battery amps and -20 battery amp Regen for a total of 40 battery amps. If you’re a beginner, -20 battery Regen amps is gonna be a lot, so tweak accordingly.
@Call-me-krampus just checking, is this a diy pack running a bypassed bms?
Or is this a pre-built pack running a discharged bms?
If the latter, I would avoid getting close to the max rated discharge, and run 35-40a battery each side.
I was wondering when someone would say something yeah those cells can’t handle that much for sure
That’s too much, I get 4.5v of sag on 12s running 10 amps per cell with these.
I’m shocked. I didn’t immediately respond hoping someone would. That pack defo BMS discharge too.
Well do we know which exact Panasonic cells these are? I don’t remember seeing a name mentioned in this thread…but it’s very likely exactly what you are thinking
I was speaking from a bms cutout safety standpoint, which can cause streetface. You definitely have a point on sag, but thay jusy makes you slow.
The 96a cont and just “Panasonic” screams boundmotor battery. They’re “tm3” cells.
@Call-me-krampus send a picture of the battery.
Is there a capacity stated? Is it 19.2 or 20ah?
u r just gonna get a pic of the black battery pack as is, so to save everyone’s time, here is the pic
I mean if his pack looked like that, then Id know lol
It’s the 12s4p 21700 Panasonic cell battery from eovan they rate it at 96, I’m discharging 90
It’s the 19.2 or 855.5 wh one. I got it from the eovan site.
So this is the tough part to judge and set appropriate settings.
We don’t know if it evoan is stating the discharge max of the bms, assuming it’s running discharge since it’s a pre-built company, or if they’re just overstating the packs total discharge.
The decision of what to pull from the pack is more challenging because pushing the limits of a discharge bms may come with worse consequences than just pushing a cell a bit harder than its ability.
Politely asking evoan on the specifics of the pack would be my course of action.
I did, they just said that the 12s4 runs 96, I did send another email asking more specific so let’s hope they respond but so far all I know is 96 max cont. Stated on the site and that’s what they said in email and the 12s3 is rated for less. Cause I asked which one was the 96, the 3 or 4p