Goped Iped 1 LiPo to LiIon replacement

[rg12]

Hey Guys,

I have a guy that wants me to build him a 7s 8Ah pack for his Goped Iped 1 scooter.
The original pack is 7s 8Ah LiPo that says 90A on it.
The pack that I want to build is a 7s 7.8Ah built from 3.9c rate LG M26 cells (total 30A pack)

The question is, do you really think that this little 7s scooter needs such high C rate?
I couldn't find any details about this scooter's controller specs, only this link that shows the controller but no specs:
http://goped.com/controller-board-i-ped-216130095/

What do you guys think?

 

[redilast]

Not much info as to the wattage of these gopeds, but one site lists the iped 2 has having a 1000+ watt motor.

If thats the case, that would be around 40A draw. You'd probably want to go with at least 20A rated cells, such as the LG HE4, or add more cells in parallel. Never a good idea to push 10A cells to 10A constantly. Ideally you push cells to <1/2 their max rated current unless you have a good cooling solution or its for very intermittent use.

 

[rg12]

thanks man, that helps alot

 

[dogman dan]

I agree, if its pulling 1000w possible peak from 24v, that's 35 amps. 4.9c spikes,, YIKES. I think you need a lot bigger battery.

Also, size of the scoot can matter less than the size of the rider. A big boy will pull the longer spike, whatever that is.

The original battery good for 90 amps,, yeah right.

 

[rg12]

Yeah I bet this tiny 8Ah pack isn't really 90A...
I told the guy that I will build him a dual 7.8Ah with 3.9c cells that will provide 61A (on paper) which is more than enough for this little scooter.

Thanks alot guys

 

[silviasol]

The stock pack are 10c cells and handle 80amps. Even 7s 8ah 10c is not enough for the brushless motors esr and ipeds use. They are very strong at low speeds and will pull 100amps or more if you push them hard up a steep hill going slow. With only one of the stock 10c goped packs the bms high amp protection with shut the power off if you gun it from a stop(I used to own one). The bms is rated at 60amps I believe. Later I upgraded to two packs and it would never cut off. So 120amp rated pack or more is best. Even then it will pull more amps then 120 if you do things like hold the brake and put power on the motor. Or even try to creep up a steep hill with full throttle. Don't risk using too low of c rating, the pack could start on fire.

 

[Ghost1068]

What kind of packs did you put in? I have a stock iped that needs the batteries replaced.... I was thinking of going with lipos from hobby king in a 6s2p (12s configuration) is that too much? What should I use that will be the best for the money and give me good range/performance? Thank you.