Continuous long-period charging limit is 4A per cell but for brief braking you can exceed that, even by a lot. Because it’s brief.
I would not freeze a mostly-drained battery and then skitch on the back of a car, in the winter, braking trying to charge your pack. That can damage the cells.
Normal skating and braking with a battery that’s not frozen (Even using throttle in sub-zero temperatures heats up the battery into the safe zone) won’t damage the cells.
People don’t realize but the most wonderful thing about lithium ion batteries compared to lead acid is there technically isn’t a limit of how much current you can dump into the cell or realistically take out.
You’re simply limited by temperature and lifespan of the cell.
All the cell ratings and spec sheets are simply a sheet of how the cell will perform in most circumstances. Take the 30q for example which is a spec’d 15A discharge cell that can do 25A with a temp cutoff no problemo.
Sure sag and other things definetly come into play, but if you wanted to you could dump 100A into a single 30Q and it probably wouldn’t blow up, for a few seconds.
For a community that is so against running discharge BMS’s its awfully interesting people run such conservative battery regen Amps…
Ok.
That’s not what that means to me 
haha after the board is all waterproofed I will ride it through a lake
You use those mounts I sent you? Pictures?
Wrap it in a trash bag and go. It’ll be fiiiiine.
yesss, thanks for the hookup!!
here you go: (still needs some mods to make it look nicer)
also I’ve never been the guy to post my build since they don’t always end up great so just fyi this isn’t my first build/mod but it looks a little fucked because I still gotta fix some stuff on it.
Ohh that’s purdy
I didn’t think anyone else used those wheel pulleys. Where did you get them? Hobbyking has been out of stock for a while now.
haha yeah the wheel pulleys are sick! I borrowed them from my friend (I think they’re from Trampa) until my kegels come in so I can use the 110s!
Your motors are uneven lol. Looks good though lol.
haha yeah gotta fix em
Oh that isn’t this wheel pulley?
no def not. pretty sure it’s this one https://trampaboards.com/12fifties-carbon-fibre-motormount-panel-with-custom-motor--pulley-kit-for-stickies-longboard-wheels-twin-p-26963.html
Oh wow, that almost looks like the same or a very similar pulley
Is it 36T 23mm wide? (“22mm” size)
not sure how wide exactly but it’s it’s 32t
do you mean 33t?
trampa doesn’t do 32t for this application
yeah just checked 33t mb
Confirmed it was the battery regen current that was the issue. Apparently -6a is too high and -12a (per side) is ideal, I might go a little higher and mess with throttle curves later to get in the perfect smoothness.
Why 40% (and not 10% or 50% for example)?
Honestly, good question…I personally think it’s a safe current for the batteries to charge. It only directly affects the braking power at high speeds
