Iām still super confused about Li-ion battery cutoff voltages. I think I have mine set up wrong since Iām only getting about 15 miles range with my Samsung 30q 12s4p but got 30 miles out of it before on unknown cutoffs.
Max voltage per cell: 4.2v
Min voltage: 3.2v
Multiply that by 12 since I have 12 cells in series and it should be:
Max cuttoff: 50.4v
Min cutoff: 38.4v
I currently have it set as such to prolong cell life:
Max cutoff: 42.0v
Min cutoff: 39.0v
I donāt think this is right because my Metr.pro constantly changes these vesc settings among others so I removed it from my system. Help would be greatly appreciated.
Doesnāt seem correct to me either. You got a 604,8wh battery which means you use 25wh/km. Your max cutoff is set to 42v but right above you says it should be at 50.4v. Thatās a pretty big difference. Maybe it has something to do with that?
What you mean with max cut off?
There is only cut off start and end.
LiIon can be discharged till 2.5v per cell.
The standard settings with the ackmaniac sw are cut off start at 3v and cut off end at 2,8V.
If you set it to 3,2 and 3v itās still a nice headroom till 2,5V. Try this settings and look if you get a better range. If no, than check you pack, maybe one cell or parallel group went bad.
I would like to start using lights on my build, they need a 5v source, can I use 5v from the Vesc? (flipsky 6.6) or I have to use a ubec? it;s kinda hard to find one for 12s.
Your vesc can output only 0.5a if I remember right.
Plus you donāt want to risk a cut out because of faulty hardware you connect to the vesc.
Better to use a step down converter or Bec like this:
I bought mine on hobbyking but canāt find it at the moment. They still should have just search a bit.
If you add solder on a charging port theoretically yes, but I donāt know how the amps are regulatedā¦
I use this for one of my buildings
Schau, was ich auf AliExpress gefunden
https://s.click.aliexpress.com/e/bawY49du
Itās like a waterproof powerbank with a 12v and 5V output with place for 6x 18650s. If you have space for it on your board itās maybe an oportunity.
now thats something im interested in now. Ive got plenty of space in my enclosure to add this. would be interesting though to check if the bec can safely charge a phone.
I think it output only as much amps as needed, but I didnāt tried yet so I donāt want to say something iām not sure in.
Maybe you have an old phone laying around to try it on?
I ended up at 16.5 miles using 65% of the charge. It was at 90% when I started and I ended at 25% because battery sag started rearing itās ugly head. So I guess I could push 25 miles out of it from a full charge which means weāre good!
Reverse motor mounts in Europe? Iām looking for really long motor mounts, atm I have ones with 85mm center to center but I had to cut the back end of the deck flush with the baseplate in order to have a decent clearance. I have Dickeyās mounts coming, that are 95mm with maybe +5mm motor play, but seeing some of them bending, Iām looking for a plan B option. Either long mounts, or evolve trucks.
