> 🇮🇹💦 Of the Loin Wrote:
> Oh man yeah
> So for 18650 cells there is a physical limitation to the capacity of the
> cell (since 18650 is a size/form factor nothing else). You cannot exceed
> 3400mAh without safety concerns.
> Panasonic makes the highest capacity cell at 3400mAh. Anything above
> that is a lie.
> For electric hub motors the two important characteristics are:
> Pole pairs
> Wattage rating
> If you know what the Kv is of the motor that's actually more important
> but that's getting technical.
> Also if you get like an ASI controller or even bother to spend any money
> on a new controller, you can make it go faster :)
Yea one of my roles at work is developing process tech for calcining the raw materials for batteries, like the actual cathode active material and like the best case best specs in terms of capacity per gram or per cc, if it was purely packed with active material 18650's couldn't possibly hit 4800. it's just wild. And you know this but man I really didn't expect it to be under 100.
But if we or other raw material suppliers make off spec or under performing material, like you make it wrong or batch it or cook it wrong whatever, you lose structure basically you lose capacity. the material wont survive as many charges, it'll hold less charge etc it gets sold super cheap cuz it's shit material. It's like if you had watered down swamp gas and couldn't salvage it so it gets sold for 20 cents a gallon. And that's what goes into those cheap cells, they also cut cost by just putting a lot less in, I mean the cheapiest weigh half of a decent battery cuz it's mostly empty... you really get what you pay for.
Also the 1st hub motot I got was advertised as 1kW and had a 15A fuse on a 32v battery... I also recently opened that hub and theres a 750w sticker in there lol. Just say 1kW and nobody will know and you can charge more money!
Anyway, I saw a dude on one of those folding sondors yesterday, it moved great. I had my 2wd hybrid moped with the above mentioned 750 front hub, and his was much quicker. (Well till I put on the gas! HYBRID woo)