Search found 25 matches

by bonald
Feb 18 2019 11:08pm
Forum: E-Bike General Discussion
Topic: Stolen DH Comp in Boston
Replies: 6
Views: 379

Re: Stolen DH Comp in Boston

Chain locked on my bike rack.
by bonald
Feb 18 2019 10:07pm
Forum: E-Bike General Discussion
Topic: Stolen DH Comp in Boston
Replies: 6
Views: 379

Stolen DH Comp in Boston

My black Giant DH Comp was stolen today in Boston.
Right on B Street and West Broadway. In front of the police station.

EM3ev bag, BMX handlebar.

Here's a picture.
Image
https://imgur.com/a/3YkZhYG
by bonald
Jul 12 2018 1:16pm
Forum: E-Bike General Discussion
Topic: 24inch front
Replies: 2
Views: 239

24inch front

Can someone guide me. I live on a remote place and no one has 24 inch rims. My ebike is a Giant DH comp with a rear hub in a 24inch wheel. I want the change the front one to a 24inch. It needs a 20mm hub. My fork is the stock Manitou that came with the bike. I can buy the wheel and spoke on ebike.ca...
by bonald
Sep 05 2017 9:16pm
Forum: E-Bike Build Threads / Photos & Video
Topic: A caution to all
Replies: 14
Views: 2457

Re: A caution to all

You need a better bike and a better battery.

Buy a downhill bike off Kijiji
Build a 72v 14ah battery
Install your motor and controller
Ride between 45-65km/h for 20 km
Recharge
by bonald
Sep 17 2014 1:19pm
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

Re: DIY UPS low voltage question

do you have to build this setup for each of the UPS locations? Yes if you leave a charger or power supply connected you should open the power supply and cut out the resistor across the output capacitors to reduce the drain down current that would leak out of the battery back into the charger and in...
by bonald
Sep 17 2014 10:49am
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

Re: DIY UPS low voltage question

We are trying to move away from SLA. We keep changing them every 2-3 years because they lost most of their capacity.
We also tried deep cycle marine battery but we had to refill them with water constantly and they still failed after 3 years.
by bonald
Sep 16 2014 7:40pm
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

Re: DIY UPS low voltage question

Any one knows what are the balance board connected to his cells?http://youtu.be/oJ8AfJsOhsM

Edit: that's minibms board.
by bonald
Sep 16 2014 7:25pm
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

Re: DIY UPS low voltage question

Quite easy to open with a butcher knife if your German.
http://youtu.be/pV9g8lf0lf4
by bonald
Sep 16 2014 7:10pm
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

Re: DIY UPS low voltage question

i have never seen a lifepo4 pack that was able to maintain balanced cells. But it's LiFeYPO4 ! What? For scientific purpose, I'll update this thread in 6 months with the cover removed and I'll take mesurement on each cell. I have 5 more sites that will need a UPS like that, anyone have a better bat...
by bonald
Sep 16 2014 10:12am
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

Re: DIY UPS low voltage question

I found what I was looking for:
http://www.reuk.co.uk/buy-MINI-12V-PROG ... CT-LVD.htm

Now my UPS is complete.
by bonald
Sep 16 2014 8:32am
Forum: Battery Technology
Topic: DIY UPS low voltage question
Replies: 16
Views: 1745

DIY UPS low voltage question

So I made this DIY UPS with a 1500w inverter, 4s Winston battery, 15v meanwell PSU and a amp meter configured with a LVC set to 11.5v. Everything works fine except that there is no recovery voltage on the amp meter, when it hits LVC it won't come back ON unless I press the power button. I can't use ...
by bonald
Sep 03 2014 7:59pm
Forum: E-Bike General Discussion
Topic: Overvolting Bafang BPM
Replies: 49
Views: 4385

Re: Overvolting Bafang BPM

I am running my BPM code 11 at 20s 25amp with no problem at all.
by bonald
Aug 25 2014 11:34am
Forum: Motor Technology
Topic: Greentime controllers
Replies: 977
Views: 119043

Re: Greentime controllers

Here's the correct wiring diagram, Leo sent me.
Image
by bonald
Aug 19 2014 10:27pm
Forum: Motor Technology
Topic: Greentime controllers
Replies: 977
Views: 119043

Re: Greentime controllers

Received and installed greentime 72v 45a 15fet controller today. There were no instructions or diagram with the controller so thanks for this thread without it I would still be trying a bunch of combinations. Tried it on my em3ev dd motor and was really surprise! I've hit 70kph (43mph) without even ...
by bonald
Jul 15 2014 2:07pm
Forum: E-Bike Build Threads / Photos & Video
Topic: DH Comp MXUS DD
Replies: 1
Views: 492

DH Comp MXUS DD

Giant DH Comp with 20s6p NCR18650 17ah, Besttech BMS, Cellman MXUS DD 335rpm, 25 amp infineon controller, EM3EV bag and Kiwi dropouts. Top speed 65km/h on flat with lots of pedal power. I could fit 120 cells inside that triangle, no room for more! The first 20s pack I made for this build was with UR...
by bonald
May 22 2014 11:56am
Forum: Battery Technology
Topic: EGO Power Plus 56V Lithium-ion Battery
Replies: 12
Views: 4663

Re: Ego Power Plus 56V Lithium-ion Battery

From the spec it looks like a 56v 16s pack.
by bonald
May 13 2014 7:41pm
Forum: Battery Technology
Topic: Samsung 25R/LG 18650HE2/ Sony VTC5 high power 18650 battery
Replies: 798
Views: 125817

Re: Samsung 25R/LG 18650HE2/ Sony VTC5 high power 18650 batt

Yes, post it here, we need some pics of that spot welder!
by bonald
May 31 2013 9:18am
Forum: Battery Technology
Topic: 14S6P Triangle Pack build using Samsung INR18650-20R cells
Replies: 17
Views: 3567

Re: 14S6P Triangle Pack build using Samsung INR18650-20R cel

that's nice.
i am curious what price you paid.
by bonald
May 16 2013 2:23pm
Forum: E-Bike General Discussion
Topic: First Conversion - Giant Sedona - Your input greatly apprec.
Replies: 73
Views: 5916

Re: First Conversion - Giant Sedona - Your input greatly app

or just go to em3ev.com and buy the direct drive kit with a 10ah battery, cost 615$ and plug and play.
by bonald
Sep 21 2012 8:36am
Forum: Motor Technology
Topic: KU123 100V Mod: success!
Replies: 30
Views: 6881

Re: KU123 100V Mod: success!

mine has refly written on it.
by bonald
Sep 21 2012 8:15am
Forum: Motor Technology
Topic: KU123 100V Mod: success!
Replies: 30
Views: 6881

Re: KU123 100V Mod: success!

I have the KU120 controller. 63v caps.
Not really like the one you have. here's a pic of mine.

Image
Image
by bonald
Sep 20 2012 8:02pm
Forum: Motor Technology
Topic: KU123 100V Mod: success!
Replies: 30
Views: 6881

Re: KU123 100V Mod: success!

I have to try this on my code 11. 285rpm @ 48v
What is the uf rating on the hua tong caps?
by bonald
Aug 13 2012 11:11am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1627
Views: 435444

Re: Homemade Battery Packs

Can someone tell me whats wrong with cell #7 and #8 ?


Image

Image

Image
by bonald
Aug 03 2012 8:09pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1627
Views: 435444

Re: Homemade Battery Packs

Here's mine. Still work in progress, 14s12p, at 12p most of them gives around 20ah when discharged to 3.0v. Batteries are from 4 years old Toshiba laptops. Those are panasonic cells, I also have a bunch of sanyo.

Image
by bonald
Jul 19 2012 11:57am
Forum: Battery Technology
Topic: 1968 100v power supply
Replies: 5
Views: 461

1968 100v power supply

Just found this super heavy power supply, looks like it's variable to 100v, 6A.
It's from a school that was built in the 60s, date says 1968.
Would you trust it to charge your batteries ? :mrgreen: