im wondering if theres a BMS, or protection circuit inside there or not... id assume there'd has to be SOMETHING!
(maybe its built into that circuit breaker lying next to it.... hmmm) ill have to do some more investigations lol)
There will be a BMS inside. It will do a bunch of evil things. We dont use them as you can garantee that you end up with shorter life, and a few other issues, and possible breakdowns and stopping suddenly at times of high currents. BMS have a lot of safety cutoffs we dont want, and they have very weak balance circuits that repeatedly allow the highest cell to bounce up and down at it highest voltage over and over. But it is what it is. Best use it since you already have it.
Those 176Ah cells would give greater cycle life, and double the range, for about 1000 US delivered. Plus the chargers we use...
http://www.wheelchairdriver.com/BM3-con ... arging.jpg the red and black things. You only need one!
It can do a mass of things, and runs from a chair, a van, a power supply, from 10 to 30V and can charge anything from a watch battery to a full sized EV car, at 40A as it balances your cells properly to a safe voltage. And it can charge, and discharge lead too, PROPERLY, as well as measure and graph the discharge capacity in Ah.
anyways ill let ya know once i get around to the range test!
If you take a look theres a thread from Expresso in new york here. He has the same pack, same chair.
Bad news is that unlike his quickie chairs the bounder is greedy. It uses more Ah per mile by quite a margin. So in reality the 100A lithium gets it about as far as a lead grp24 on a conventional chair, plus maybe 20% only.
As such he has made an 80Ah ADD ON pack that sits behind the seat, to extend range to his normal 40 miles per day standard.
Maybe someone can post the links here to show these things as he tested.