Really Dumb Question

General Discussion about electric bicycles.
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evglobal19   100 mW

100 mW
Posts: 35
Joined: Apr 03 2019 9:47am

Really Dumb Question

Post by evglobal19 » Jul 31 2020 12:09pm

Hello All,
on my DIY project have all components and donor frame assembled.

QS Motor QS273 72v 5kw hub
Sabvoton 72150 controller
20S12P 72V Panasonic 32BD 38.5ah with 100A BMS

Everything connected except the battery to the controller
Do I just connect battery and start programming? Do I need to connect to a computer first?
can anyone provide just the super simple idiot proof step by step so I don't fry anything :-)

Jonno   100 W

100 W
Posts: 165
Joined: Sep 30 2016 6:41am
Location: UK

Re: Really Dumb Question

Post by Jonno » Jul 31 2020 12:12pm

Plug it in - what display is it?
Modified EEB frame, 888 forks, 280mm DNM pit bike shock, QS273 40h V3 , Nucular Electronics 24F controller 300a, 92V @ 36ah 26650 cells, 300a BMS, Hope V4 + Galfer223mm discs + Variable regen braking

evglobal19   100 mW

100 mW
Posts: 35
Joined: Apr 03 2019 9:47am

Re: Really Dumb Question

Post by evglobal19 » Jul 31 2020 1:19pm

the back of the display shows:

AP7
750C TFTV3GC85 NB 1.0
V1 30W 201905292018

Jonno   100 W

100 W
Posts: 165
Joined: Sep 30 2016 6:41am
Location: UK

Re: Really Dumb Question

Post by Jonno » Aug 01 2020 1:56am

A picture would be good :)
Modified EEB frame, 888 forks, 280mm DNM pit bike shock, QS273 40h V3 , Nucular Electronics 24F controller 300a, 92V @ 36ah 26650 cells, 300a BMS, Hope V4 + Galfer223mm discs + Variable regen braking

HK12K   10 kW

10 kW
Posts: 911
Joined: Jul 24 2019 12:49pm

Re: Really Dumb Question

Post by HK12K » Aug 01 2020 1:58pm

You should have a fuse or approximately rated dc breaker between the battery and the controller. Aside from that, light her up. (But keep the rear wheel off of the ground and yourself away from the pedals and other rotating bits until you're sure it's sorted and ready to ride!!)

999zip999   100 GW

100 GW
Posts: 9512
Joined: Jan 10 2010 1:40pm
Location: Dana Point So. Cal

Re: Really Dumb Question

Post by 999zip999 » Aug 01 2020 9:51pm

I use a pre resistor so no big spark and so that the controller caps and help them from overload from the voltage of a full battery. Clean that up.

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