Search found 262 matches

by granolaboy
Mar 02 2019 9:26pm
Forum: Motor Technology
Topic: HyPer 9 SRIPM motor
Replies: 2
Views: 591

Re: HyPer 9 SRIPM motor

Now that they are available, anyone running one yet?

The specs and kit look pretty awesome. I wonder if they'll do larger hyper 11/13 like they did with the warp line.

https://www.evwest.com/catalog/product_ ... 2uvo981h30
by granolaboy
May 11 2018 2:44pm
Forum: E-Bike Technical
Topic: Melted a ebikekit mini-hub motor-2500watts cont.
Replies: 46
Views: 6187

Re: Melted a ebikekit mini-hub motor-2500watts cont.

Any thread with a title including words like melted/burned/exploded/vaporized... should begin with pictures of said occurrence. :twisted: For example, this is what happens when you upgrade your phase wires, but not the ones in the controller: http://granolaboy.net/temp/blown1.jpg There. Now those th...
by granolaboy
May 11 2018 2:38pm
Forum: Battery Technology
Topic: A123 20AH LiFePO4 cells interconnexions
Replies: 34
Views: 1837

Re: A123 20AH LiFePO4 cells interconnexions

late to the party. I used the ones from osn power...

Image

viewtopic.php?f=14&t=69856
by granolaboy
Jan 12 2018 12:21am
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

Was pointing this thread to a friend building a battery, and thought I might as well post the battery is still in use, and still functioning perfectly. I've probably put over 6000km on it. The main battery that came with the bike is feeling a bit weak though...I think I'll probably have to replace i...
by granolaboy
Jul 07 2017 8:14pm
Forum: Electric Watercraft
Topic: BMW i3 battery and Torqeedo Electric boat
Replies: 1
Views: 945

Re: BMW i3 battery and Torqeedo Electric boat

That is awesome news! I've been looking at torqueedo for a while now...
by granolaboy
Jul 07 2017 8:00pm
Forum: Motor Technology
Topic: too long battery wires will kill controllers
Replies: 36
Views: 5140

Re: too long battery wires will kill controllers

Guys, thanks for the thread...I'm currently assembling a plan to put an AC-75 and a zilla controller in my Toyota 4x4, and I hadn't even considered inductance on long battery leads hurting the controller. Seems obvious after reading it, and i'm a bit embarrassed for it not being on my radar in the f...
by granolaboy
Apr 26 2017 2:08am
Forum: E-Bike Technical
Topic: Help find controller with bluetooth, cheap, widely available
Replies: 12
Views: 1474

Re: Help find controller with bluetooth, cheap, widely avail

check out arm bldc controllers. infineon has a new one that looks killer, but they only sell bulk. atmel tools and support rules, ti isnt bad, nxp is brutal and i would avoid learn eagle and get your own board made by an online pcb fab. its stupid easy these days its just the mcu and a 3 phase inver...
by granolaboy
Apr 25 2017 11:47pm
Forum: E-Bike General Discussion
Topic: Lets cut to the truth, facts rule!
Replies: 41
Views: 2131

Re: Lets cut to the truth, facts rule!

for that kind of money I'd be looking at a Zero

edit: just checked. less money for a 2017 fx stealthfighter or a fxs supermoto

probably weighs a little more than 70lbs tho.
by granolaboy
Mar 25 2017 8:01pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Evt 4000e electric moped, help needed
Replies: 13
Views: 1924

Re: Evt 4000e electric moped, help needed

Oh, and might as well mention as well that it has no pedals, and is therefore not an e-bike, but a Limited Speed Motorcycle (LSM). Essentially the same as a 50cc scooter.

You'll need to register & insure it to ride it [legally].
by granolaboy
Mar 25 2017 7:55pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Evt 4000e electric moped, help needed
Replies: 13
Views: 1924

Re: Evt 4000e electric moped, help needed

Your scooter is 48V with a brushed motor, 120A. No way it's going to go with 36V. In 2009 , EVT switched to brushless motors, and a beefier 130A controller. I have an EVT 168 with the brushless motor. I even added a booster battery. Here's my thread, not sure if it helps with your brushed 4000 thoug...
by granolaboy
Oct 21 2015 3:37pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My New 2010 EVT-168
Replies: 16
Views: 7340

Re: My New 2010 EVT-168

GPS verified, 69km/hr on flat WOT.

It seems Volts == km/hr on this bike.
by granolaboy
Oct 21 2015 3:35pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

I paid $20 USD per cell when I ordered for AMP20M1HD-A. BMS-L4S100100-480 was $75. Assembly kit was $40. CHA-1210 charger (12v 10A) was $40. All USD. And I might as well mention that they accidentally sent me a 36v charger, and they just told me to keep it and sent me another one. Pretty cool if you...
by granolaboy
Oct 20 2015 4:55pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorino XPn 2011
Replies: 458
Views: 78126

Re: Motorino XPn 2011 E-Scooter

man, you sure have got some mileage out of that motorino :) You got that thing back when I had my gio 500+ POS... I think you take the award for "most modded motorino" :) hehe I'm sure I'd still have my Xph if it didn't get stolen. Ever think of moving up to something with plates & insurance? You ca...
by granolaboy
Oct 02 2015 6:17pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

I got everything from OSN Power This is the BMS: http://www.osnpower.com/pddetaildate/product/detail/20141028_21905563.html Says it does 100A continuous, and over-current protection kicks in at 220A +- 30A. I have to say, the over-charge protection voltage at 3.9v is totally useless for a LiFePO4 ce...
by granolaboy
Oct 02 2015 6:11pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Custom Sport Scooter Project
Replies: 51
Views: 16140

Re: Custom Sport Scooter Project

Nice build man!

Looks really slick all put together.
by granolaboy
Oct 02 2015 6:02pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Study: Scooters are 3.5X Safer Than Motorcycles
Replies: 40
Views: 5273

Re: Study: Scooters are 3.5X Safer Than Motorcycles

Coincidence that motorcycles are 3.5x as fast as scooters?

Kinda hard to get into too much trouble with 150cc or less...
by granolaboy
Sep 30 2015 10:55pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My New 2010 EVT-168
Replies: 16
Views: 7340

Re: My New 2010 EVT-168

So I've modded my scooter and added a booster battery for more speed. The mod itself is really simple, but I ended up having to re-arrange some stuff to get the new battery to fit, so I figured I'd post what I did. I went looking for a post from someone who's over-volted a brushless EVT, and found a...
by granolaboy
Sep 30 2015 9:00pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

So the way the battery is going into the trunk under my seat means mounting the BMS on the side makes the nicest fit. http://granolaboy.net/battery/DSC01055.JPG Then I took the 6awg silicone wire, and split it into 4 wires. Each of the pads on the BMS has 4 holes in it, so I figure I'll use all of t...
by granolaboy
Sep 30 2015 8:48pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

Now I got to wire this thing up to the BMS. First I did the ends to connect to the battery. I split the 6awg silicone wire I'm using into two, then used 10awg ring terminals on each end. Then I heat-shrunk it up. Should make a decent connection. http://granolaboy.net/battery/DSC00993.JPG http://gran...
by granolaboy
Sep 30 2015 8:09pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

I didn't like wires making the series connections, so I got some 2mm thick copper plate and made my own bus bars. I just cut them out with a jigsaw, and used my desk grinder to smooth the edges and round off the corners. I used 3 of the original bars to make a jig to drill the holes: http://granolab...
by granolaboy
Sep 30 2015 8:05pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

So screw duct tape, I'm using metal banding for compression. I took a file and notched the end plates so the bands had a place to sit and not slide around. http://granolaboy.net/battery/DSC01026.JPG http://granolaboy.net/battery/DSC01027.JPG Crank those suckers down tight: http://granolaboy.net/batt...
by granolaboy
Sep 30 2015 7:59pm
Forum: Battery Technology
Topic: My 4s2p A123 Amp20 Battery Build
Replies: 24
Views: 3848

Re: My 4s2p A123 Amp20 Battery Build

Finally have some time to post pics and finish this thread. So I needed some end plates that were good and stiff to put compression on the cells. Metal seemed too heavy to me, so I went down to the dollar store and got a cutting board. It's about 3/8" thick, really REALLY stiff, and much lighter tha...
by granolaboy
Sep 08 2015 11:44am
Forum: General Discussion
Topic: Is LiFePO4 worth investing in?
Replies: 33
Views: 3008

Re: Is LiFePO4 worth investing in?

I would be looking at A123 for the 12V-compatibility of LiFePO4. Possibly salvaged modules, like the Hymotion bus packs, where you already have large numbers of cells welded in parallel. Use a BMS to charge and balance, but run naked for discharge because the power level is so high. +1 If you are l...