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Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: Jan 10 2018 1:37pm
by pasc2003
smeagol222 c.a speedometer work connected on kelly keb ?

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: Jan 10 2018 3:07pm
by smeagol222
Kind of. I need to calibrate the poles properly for the wheel and hall a wire and wheel size

I've been taking with grin about it

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: Jan 10 2018 3:09pm
by pasc2003
ok
tank-you

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: Jan 23 2018 10:59am
by Scottydog
Are you planning to have your CA have control over the KEB? I recently tried to do this with mine, but none of the wiring diagrams I saw seems to complete the wiring to make this happen. I gave up on it for now till I have time to relook at greater detail.

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: Jan 23 2018 11:22am
by pasc2003
CA3-KEB.png
CA3-KEB.png (183.52 KiB) Viewed 634 times

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: May 14 2018 6:53am
by smeagol222
So this weekend I got my LJ MJ1 modular battery fixed up

It's the 20s10p so has potential for 100amp continuous

Recently I've been having issues with the CA and programming the kelly controller. The guy who sold me the kit from QS motors was keeps insisting that my controller doesn't require programming. It's a 6kw controller and the wheel can handle 7kw peak. A fully charged battery would be 84v at 100amp would be 8.4kw output. Recently I have been putting it on 40% battery current (max is 70%) because the The 72v lifepo4 bms keeps cutting out.

Also I think the CA I have is telling me wrong numbers

For starters I have a 100amp circuit breaker which trips at 135amps. Thus far it has never tripped. So yesterday I put the controller at max settings 100% motor current, 70% battery current. Used the 72v 35ah lg cells modular battery for some tests

My God this is what I was originally expecting. It's like a completly different bike. The torque is muuuuch better and the top speed all I was game to test in flip flops shorts and t shirt was gps speed 75km/hr I'm sure it would reach the QS specs of 85km/hr

So I kept doing full throttle bursts then slow right down for a while then afterwards tested the motor with the back of my fingers. Not even warm. The battery wasn't warm or hot either

So that solved it for me

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Posted: May 29 2018 10:08am
by flippy
the breaker will trigger much later. it wont go at exactly that current. you need to sustain more then that current for a few seconds, the higher the current the faster it will pop.

personal feelings? just make a direct battery-controller connection and bypass the bms for the controller current but keep it for the rest. that way the bike will still cut out as you lose the control voltages for the controller and it will instantly die if the bms triggers a low voltage or something but it wont trigger on current anymore. that is regulated by the controller anyways.