friendly1uk said:
12s is best made up with 4s 5Ah handcase packs. About $25 each from HK. The hard case solves many packaging problems, and at $25 a brick there disposable. It's half the price of a 6s brick, for 66% of the capacity. It's win after win.
I've been using those 4s hardcase packs for a couple of years, yet I rarely recommend them to noobs. Definitely the most cost effective, but by no means will they suit many people.
friendly1uk said:
A suitable bms is $25 and a 300w charger about $40
http://ecity.en.alibaba.com/product/800537641-50419686/ecitypower_smart_bms_5_13_Cells_in_Series_for_e_bike.html
http://ecity.en.alibaba.com/product/1164311008-218652593/ecitypower_high_quality_electric_motor_electric_boat_cycles_battery_charger.html
No specs and a minimum quantity 50 order puts their price together at $3400.00 plus shipping. Yeah, now that's a deal if I ever saw one. BTW, that's a 240W charger, not 300W
friendly1uk said:
BMSbattery have just the same for the same money. It's typical pricing. LiPo bms units are a bit thin on the ground though. Dnmun gets good prices from Bestek, but they don't publish there prices, and in fact quote me around $40 not $25 So it was $62 by the time it was in my hand. If ecity post at similar rates then you might have it all for $100
I think you need to check BMSbattery 's shipping cost. It's almost always more than the price of the item you're buying. Funny you recommend bmsbattery considering your sigline "bmsbattery sent me broken and incorrect stuff, and won't even talk to me about it".
friendly1uk said:
I just looked at the hyperion and can't see the attraction. It was $140 before postage(inc $9 temp sensor not provided). It is a twin 7s design so you won't be simply plugging in. It does not appear to plug in the wall, it needs a separate power supply that won't be cheap. You will need stuff on the bike for any sort of protection while in use. It's a long way from a charger you just plug in and switch on. I would say its simply the wrong kit. If you spend that much on the right kit it will be loads tidier and offer better protection with faster charge rates.
Wow, I guess that's because you don't have a clue wtf you're talking about. Well, maybe a clue, but that's it. FYI, you can have a single plug charge port for up to a 14s lipo pack using the Hyperion 1420i, but like a bms, you have to wire it up. But it's not complicated. you can do the same with any rc charger up to it's cell limit.
friendly1uk said:
The other charger here is the $150 unreliable one that will take a pair of 6s but that means cells cost $25 more each time, so $175 for now and climbing. Plus P&P and to top it off it is just like the other one here, It is just control gear and requires an expensive psu or car battery. It's needlessly messy and less effective yet costs more money.
What other $150 charger? Never mind, I really don't care. FWIW, The power supply I've been using with my Hyperion 1420i is 24V 600W and cost me ~$20 shipped. Been using it over 2 years.
friendly1uk said:
We are not playing around with radio controlled models. We don't have to charge off the car with one charger that suits many different things we carry. We don't need balance boards to to split longer packs in to shorter more manageable parallel pieces. We have a fixed size pack that is charged from the wall. We only need to plug in and wait.
You got a mouse in your pocket?
friendly1uk said:
An over complicated battery pack is not my idea of entertainment. I think people that like a ridiculous amount of interaction with there batteries should buy a cycleanalist. That is real food for thought.
Mine either. And a lipo battery pack with a bms is over complicated.
friendly1uk said:
I have serious doubts about hearing a cellog alarm when the wind is wizzing past your head. I imagine it is a total waste of time. I can't hear a thing at 20mph. I can't think of a single reason to take the risk. I have heard the arguments and openly calculated the lot. All oem's use a bms because you have too. If you have a load of radio control stuff laying about then yes it can work, but you wouldn't go specifically to buy the stuff. That is a different hobby with different needs. I myself have a b6 incase my proper kit is out of action, but only because it is so cheap and I may actually want to charge from 12v some time. I would never put the wrong kit first.
Yep, cellog's are just another waste of money for the paranoid, just like BMS's are for rc lipo when all you need riding is a simple voltmeter.