Stupid retarted newbie

General Discussion about electric bicycles.
Post Reply
timlangham   1 µW

1 µW
Posts: 1
Joined: Nov 07 2017 7:23pm
Location: Australia, Tasmania

Stupid retarted newbie

Post by timlangham » Nov 08 2017 12:03am

Hello All I am looking for a battery pack that will fit in the frame of my bike. Its a kids bike I am hoping it will be a transition for my 10 years old daughter into a motorbike.
200 watt currie 4 pole electric motor ( was pulled out of a dumpster ).
Strong wheels rear & front suspension, everything works ok. It was originally designed for 24v 200 watt motor, but it was lame. Somehow some idiot (me) put 48 volts through it with 4 sealed lead acid batteries without a motor controller just with a switch. In the end after 40 amps fuses kept blowing & we hard wired it and it & was frightening. (were we getting 2kw out of the motor)?
We wired it up with 1000w controller everything works cool but we are lucking to get 10km range from it. Now I would like to try these 18650 batteries to do it properly I will have to fit them in the existing frame I know it will cost $500 but this is the way technology is going. I want to learn it and I was hoping someone could point me in the right direction of how to build a battery with Battery management in the shape that I desire.

Kind Regards

User avatar
Marin   1 kW

1 kW
Posts: 363
Joined: May 20 2015 4:51pm
Location: BC, Canada

Re: Stupid retarted newbie

Post by Marin » Nov 08 2017 12:28am

check out for lots of you tube tutorial and a great book by Micah Toll to read
Marin ex-rental hybrid with 48v bionx...sold
Specialized hardrock with magic pie 4-5
Lunacycle with l/r mid drive coming soon
Kona Caldera with QS 30H (maybe), and phase runner
Giant Yukon bbs02
Kona Abra Cadabra bbshd
Wildfire fat bike bbshd

User avatar
amberwolf   100 GW

100 GW
Posts: 30787
Joined: Aug 17 2009 6:43am
Location: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group

Re: Stupid retarted newbie

Post by amberwolf » Nov 08 2017 4:39am

Or there are dozens of 18650 threads with the info you want here on ES.

It's going to be a fair bit of reading and research any way you do it.

Not every thread in the list below will be relevant, but you can get an idea of which might be by their titles ... mit=Search

markz   100 GW

100 GW
Posts: 10921
Joined: Jan 09 2014 11:38pm
Location: Alberta Canada

Re: Stupid retarted newbie

Post by markz » Nov 10 2017 5:03pm

"yet another solderless DIY battery pack via NIB's" ... 14&t=60517

torker   1 MW

1 MW
Posts: 1624
Joined: Oct 16 2008 8:46pm
Location: Udall, Ks.

Re: Stupid retarted newbie

Post by torker » Nov 10 2017 10:09pm

Do you have a pic of the bike you can put up?
Dave When I die I want to slide in sideways yelling WooHoo what a ride !

Giant Rincon w rear 9C 6*10 36 v x 20 amps
Specialized FSR Comp 9C 6*10 48v x 30 amps

User avatar
dogman dan   100 GW

100 GW
Posts: 35734
Joined: May 17 2008 12:53pm
Location: Las Cruces New Mexico USA

Re: Stupid retarted newbie

Post by dogman dan » Nov 11 2017 7:15am

Easiest thing will be a light enough battery on a seat post rack. 48v 10 ah will do, and not too much over stress a good rack. Keep it under 10 pounds of battery.

Post Reply