I know there are tons of threads on this but I’m looking for updated info for a reliable setup.
I am going to be running:
flipsky 6.6 dual fsesc
190 Kv 6384 motors
16T motor pulley 72T wheel pulley on a mountain board
81 kgs/180 lb rider
I want to run 12s Lipo 5 AH 50c discharge - 2 x 6s 5 Ah 50c in series.
But i am worried about over voltage and i have no idea how much induction will take place or in other words how much induced voltage could take place.
So I am assuming that 10s is the reliable way to go giving you a bit of room for voltage spikes. But from reading all the other posts on this matter it seems 12s will be a lot more fun and be better for climbing long hills.
I am wondering if I can series 1 x 5s and 1 x 6s lipo together. Same Ah and c rating, to get 11s?
Or are the voltage spikes minimal and i should just go for 12s. Or is there a way i can protect against voltage spikes? Thanks in advance for your help.
I am pretty sure the whole reason we dont go to 13s on most ESC’s is because of the Voltage Spike you’re referring too. That said, my understanding is that 12s is pretty much agreed upon on the “safe enough” option effectively giving a 9.6v overhead before hitting the 60v limit.
10s is enough to keep you moving, but unless you’re absolutely brand new to the sport of riding boards (in general) it may not be enough to thrill you unless you plan on cranking the amperage up.
Then again, if this is an AT board and not a Street mountain board, 10s may be enough for some fun run around in the dirt and grass but too steep of an incline might see some lagging.
As for the 5S + 6S = 11S, if the cells are the same, and they have the same discharge and P groups. It is no different in my understanding than just having 11 cells single in Series. Though unless I were absolutely sure that the cells are the same, I wouldn’t trust it without ripping the packs apart… but im a overly cautious guy.
Awesome, thanks for the info and replies guys. 12s it is.
Im going to be using for mostly street use. I have some fairly long hills to tackle.
I am assuming much of the voltage spikes come from running down hill?
Is there a “safe” way to run the board to decrease the amount of voltage spike?
easy braking, slow transfer from acceleration to braking, or just settings?
thanks again for the help.
wicked thanks for the info on that. I did not know about this. I will be getting those connectors for sure. Thanks again. That definitely saved me a hard lesson.
I would worry more about your 1p config than about 12s and voltage spikes.
HW6 nowadays should be just fine with 12s and also 12s and 190kV.
Be aware that if you run 2x6s 5Ah packs your range will be between 5-10km depending on how hard you ride.
If you ride hard it’s also a good stress for the lipos. Expect to replace them after one year.
Thanks for that info Andy. I was thinking of starting with that and seeing where I was.
If I went with 12s2p - 4 x 12s 5ah, would that be a better setup for supplying power? I understand I will get more range. Wouldn’t stress my system as much?
My other idea was to run 2 lipos and then keep another 2 in my pack to keep things smaller on my board and also be my reserve batteries.
The more cells in parallel the less stress on the single cell as they share the current.
With this said, you are good with a 5Ah 50-60c pack if you buy quality lipos like the hobbyking graphens for example. I did run a 12s1p as well for a time and that was and is a nice light setup. Ideal to jump around
What you don’t want to do is running your lipos in 1p for half a year and than buy a second set and put them in parallel. You always want Elle with nearly the same internal resistance in parallel if possible.
Also, get a lipo alarm. They super cheap and you will get a signal in case one cell gets out of the row during discharge
Awesome thanks again for the info and helping me out. I was looking at some HRB batteries. The reviews seem decent but they say their c rating of 50c is more like 20.
I put the lipo alarms on the order list. That’s a good idea.
I think I’m going to get the 4 batteries.
I’m also ordering another charger. The one I have is 50w max. I’m looking a getting a dual that says it will do 250w a side.
Or wondering if it’s better to just get a BMS and a high watt laptop charger.
The charger I think is definitely easier option and cleaner.
I personally do not like a bms on lipos as you can’t put the lipos into storage voltage after you was riding, but yes it would be more easy and clean with a bms for sure.
I started with an imax 60W Charger, but that takes ages to charge
I don’t know which 250w Charger you are looking for but check if you need a power source for that one as well. Some you can just plug into the 110/220V wall socket, other need an AC/DC converter as well.
About the lipos, hrb usually not bad of you get them from a trusted source (don’t buy in China )
You could also have a look at the hobbyking heavy duty 6s lipos. That’s the ones I have. I think they are 60-70€ per 6s pack and hold up pretty good so far. Not as good as the graphens, but they also way cheaper.
So disagree to that hole statement. What is fun speed? In which case you need to consider voltage, KV, Gearing, wheel size. It’s like answering what is 1+?+?+?= make up answer
10s lacking on hills tork is needed for hills that is related more to amps than voltage so 10s packs are generally better at hills over 12s based on = wattage packs
Yep lipos are so over rated it’s a joke on a street board I pull over 50 amps often on hills or acceleration you will want even more on a AT board you 2p set up will suffer with a lot of voltsag you will be hammering the battry in a 2p set up
