I’m building a cruisey long range Li ion battery with 6x 18650 2000mah cells.
Should I go 6s 1p or 3s 2p? I reckon flight times should be similar, but with the 6s pack I’d need to be more careful with the throttle position… does that sound right?
Any other considerations?
Depends on what your quad is expecting…
What motors it has, etc
Ah yes, good point… its a 6s setup with XingE 1900kv motors, and fairly punchy 5x4.8x3 props.
There is a big difference between your motors and flight controller running on 3s and 6s (Literally half the voltage difference, 11.1v vs 22.2v.) It’s unlikely that they are capable of running on both cell amounts.
I would suspect that your FC and motors might be capable of 4s or 6s running (obviously if they both go to 3s than your golden either way) but you would need to check the manufacturers website and see. If you’re lucky enough that they both do then this is just a config change in betaflight to enable it.
You might be able to get away with using a 4s pack li-ion if not, but that would mean adding 2 more cells with the added weight or dropping to just 4 cells.
If you can provide the info on what Flight controller you have plus the size of the motors, 2005 or 2207 for example, we can assist futher.
There’s your answer, you need to use 6S1P
1900kv 2207s with a Speedybee f405 50a fc.
I’ve actually flown it with a 3s battery, it flew - obviously it needed a lot of throttle, but still got 80kph!
I did wonder if it would be that simple
…!
I have seen a version of your FC / motors and both indicate 3s compatibility, maybe there is some better settings to be found in Betaflight to tell it you’re using 3s but it seems, yes it can run on 3s and 6s. For longer flight times thus range, 3s2p would be better then 6s1p.
I’m not sure that is correct when you take into account Motor KV.
Anyway, for long range you want to be able to punch out in case of emergencies.
Watch this:
I cant help but think that 2 batteries of equal Kwh should last the same amount if time if flown in a similar fashion.
The only difference being throttle stick position and punch potential.
I coukd also be looking at this with simplistic eyes.
Actually, I’ve just thought, running cells in parallel doubles the discharge rate doesn’t it? That would take me from 25 to a far safer 50amps.
Yep, that’s the great benefit, it’s very rarely that I make just 1P packs
Yes, but a lower voltage you will draw more current for the same power.
In fact at 3S you will draw twice as much current as 6S for the same power.
Power = volts x amps