im going by samsungs in house test and just general reviews.
and no one runs it where they cant balance, any 18650 battery made here is made with a bms or balance leads.
I can’t find those Samsung safety claims.
The guy above is going without anything to monitor
its on the datasheet for the cells
Here’s a sheet for the Lg hg2 cells. The tests are on the last page. They’re similar and showing doing just as well. I’ve never heard of a li-ion cell for sale that was considered safer.
http://www.lenovo.com/social_responsibility/us/en/LGC-CY151.pdf
But after looking at both these…they’re safer than I though.
I think that regardless of the brand, all lithium batteries should be considered dangerous and treated with respect.
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If you are using the VESC, divide 8600 by your motor KV and that will give you the max voltage you should use. Of course this isn’t some golden rule just a general guide.
@AbrownMN If you are going to power hubs you will want some amperage for initial take off and acceleration unless you will be installing a VESC. The VESC can make a weak pack work by limiting the current draw but, in my opinion, it is a big compromise. Go as big as you can with your battery pack and you will not need to put the VESC into “nanny mode”.
10s7p
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Board looks nice Chaka… I want one 
Damn @chaka…that board is awesome…I went with a 12s3p pack from torqueboards (30a-60a I think?). So I should be able to power the dual’s with that no problem, right? I also am going dual VESC so as you mentioned that should help. Any other advice you can give is greatly appreciated. I haven’t been able to find the exact KV of the Carvon’s…I should probably call on @leVer…
The Carvon Hub Motors are 149kv.
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8600 divide by the motor kv giving the voltage you can use with the vesc!?! that seems really high. I did read vedder’s thing about an optimum e-rpm but I didn’t understand it to mean the voltage usable. With 100kv motors that would allow me to use 86 volts!. that sounds way off. I heard from him that 12s would be fine so 44 volts or maybe call it 50.
86 volts? maybe I’m misunderstanding you.
what’s the highest voltage youve ran the vesc?
Are these the biggest capacitance with low esr: http://www.digikey.com/product-search/en/capacitors/aluminum-capacitors/131081?k=Rubycon+ZLH&pv13=126&pv63=491&FV=fff40002%2Cfff80009&mnonly=0&newproducts=0&ColumnSort=63&page=1&quantity=0&ptm=0&fid=0&pageSize=25
what cells are they?
What woodworking tool did you use to cut that slight channel around the outside edge? A router? What sort of bit did you have in there?
Looks more like 60amp continuous and 105 burst with 3p for your pack torque
Why LG HE4 vs Panasonic NCR18650B ? I know the HE4 have 10A cont. Discharge but Panasonic have much higher 3400 mah and 8a cont. You wouldn’t be pulling 30a cont and 80a burst?
He4 have 20 amp continuous
The Panasonic are 6.8amp continuous.
@Hummie - Yeah, so far I haven’t needed any higher than that. Bigger BMS/more costly and don’t seem a need.
Oo so the bms is the limit