@DEEIF I was told between 36-38.4 for a good lifespan. I set mine at 37v
Li-ion cylindrical cells can go pretty low - most manufacturer datasheets spec them down to 2.5v, and most people on here go down to about 3.3-3.0 +/-. I think I had mine set with LVC starting at 3.2v/cell and ending around 2.9v/cell.
It really depends - itās a tradeoff between how much range you want, and how much cycle life youāre willing to sacrifice - discharging lower (below 3.0) is harder on the cells, but gives you somewhat more usable energy.
Wow thatās high. I have mine set at 3.0 for soft and 2.9 for hard cut off. I needed more range for Bergās. I didnāt wanna upgrade battery just yet. It still has plenty of life in them.
@pookybear 37 is just 3.08 per cell. My build uses a 12s6p 30q. Range isnāt a factor for this pack as I intend to double it in the future. So I decided to give the best life cycle I could without sacrificing much range in exchange. Iām making sure it lives at its maximum possible
That makes sense. I have my Vesc set to 36v. I read that wrong. I thought you typed 3.7v. My bad.
The size is this.
I usually set my cutoff start at 3.4V/cell and my cutoff end at 3.1V/cell
So for 12S thatās 40.8V, 37.2V
But there is no hard and fast rule as @MysticalDork mentioned
Well the only hard and fast rule is cutoff end needs to be 2.5V or higher and preferably not even close to 2.5V
Anyway I can swoon @Dareno to help me build my first build?
ā¦with compensation of course :))
Yup thatās the settings VESC tool recommended to use!
Interesting. Iāve been using older versions (Ackmaniac) and I donāt recall those being the defaults. Maybe they changed it LoLz
Iām not sure on if I set up on ack or trampa VESC toolā¦ whichever one @torqueboards made the guide for
Best sub 150e hubs? Meepo nls?
Is there a way to make my drivetrain more efficient given that the hub motors I use are limited to 350w?
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Currently I have it set to PPM BLDC, with 12a battery max per vesc, 10s2p 30q battery and ownboard hubs
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My motors and hanger are never hot unless I ride for the entirety of my battery pack (12 mi)
Would using watt control and limiting it to 350w per motor create a more efficient result?
I donāt really know how to calculate this, so any advice is good
In general, lower power is more efficient, as is lower speed (less wind resistance). Thereās honestly not much more you can really do to improve the efficiency using only software other than going slower and limiting your maximum power output. Youāre not that far over your 350w rating already with your 12A battery max.
Basically if you want more range, either go really slow, or get a bigger battery.
I figured that was the case, lol.
I found some calculator online that says 8.33a should be my target amps at 42v and 350w, but that seems like it wonāt be worth it.
I know itās a semi loaded question, but would you personally prefer a 11s 3p pack of Samsung 30ts or a 11s4p pack of 30qs for a boosted board clone ( just changing battery and vescs). The 5v sag I get with the 24a load on my 10s2p battery for Spuderoo is just depressing, and Iām looking to eliminate* that while still pushing 20a per vesc on my boosted project
* Make it less noticable at leastā¦
5v of sag at 24A (12 per cell) seems excessive for a 30Q pack. Based on the internal resistance of the cell, Iād only expect a sag of 1.5 to 2.5v at that current, and a maximum of ~4-4.5v at the full 40A that pack should be capable of.
Honestly battery selection is all about space and how much range you want - calculate the energy of your packs by multiplying the capacity by the nominal voltage and see for yourself.
https://www.thingiverse.com/thing:2981889 Should I get this, like how much could this improve cable cleanness from a scale from 1 to 10? Or trying to 3d print this wonāt help because itās just so fragile?
Careful or you will call the humdinger and feel his wrath
Thingiverse is so broken, itās down right now completely looks like https://www.isitdownrightnow.com/thingiverse.com.html
In general 3d print with the right material can be durable but donāt expect PLA to act like TPU or Nylon.