Search found 49 matches

by sailah
Feb 17 2019 10:41pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

I did, its now at 4.17V along with everything else.
by sailah
Feb 17 2019 3:35pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

So I decided to take apart pack or at least perform adequate destruction to get to a point where I wasn't willing to go any further. Bought a metal trash can. Set up pack on my tailgate, dressed in heavy clothes, full face shield, gloves etc. Applied 99.9% Isopropyl Alcohol to soften up glue and sma...
by sailah
Feb 16 2019 9:34pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

In my limited experience, the hot glue pulls the wrapper off. I'm wondering if there's an established way to extricate the cell from the group?
by sailah
Feb 16 2019 9:32pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

Yeah all the cells were brand new from NKON with no time on them at all. Benefits of having an infrared camera on hand, I shot the pack and the bad cell is clearly hot. I shot it again after 20 min and it dropped down to 55C so it looks like it won't cause any further harm. FLIR0353.jpg FLIR0352.jpg
by sailah
Feb 16 2019 8:49pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

Upon further inspection, after removing all the foam padding and my careful wrapping I found a bad cell. It was blackened around and clearly not right. Also there was a smell. As I was looking at it, not touching, I saw it spark. Well that was enough for me. Pack was promptly brought outside and pla...
by sailah
Feb 16 2019 8:37pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

Well thanks for that!!! I decided to stop charging and cut open the pack to access the individual balance leads. Started checking from nickel strip to nickel strip. Noticed 1 group was off. So then I checked between pins on BMS since it's wired so neatly. 1-2---4.17 2-3--4.18 3-4--4.185 4-5--4.212 5...
by sailah
Feb 16 2019 7:46pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

Re: 84V pack not reaching full charge

Thanks, I have BMS wired up to charging circuit only. I made up a quick lead to attach the charger XT60 lead directly to pack, bypassing BMS. Now charging voltage is heading back up like before. I'm reading the voltage through the charging lead lol I guess it's possible BMS is bad, it's literally on...
by sailah
Feb 16 2019 7:21pm
Forum: Battery Technology
Topic: 84V pack not reaching full charge
Replies: 14
Views: 458

84V pack not reaching full charge

Hi, Been away for awhile getting back into this project. Please forgive me if this is a dumb question I did search... I built an 84V 20S12P pack from Samsung 25R cells. Added BMS. I charged the pack last year during maiden voyage and had a mechanical problem so I put the bike in barn. When I got bik...
by sailah
Apr 09 2018 7:37am
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Re: Looking for advice on my 18650 build so far

Thanks for comments sorry was delayed in response. I decided to run BMS but only for charging. Ran all balance leads, connected B- to pack. Ran charger lead to Pack + and BMS P-. Made up sleeved charger leads with XT60 connectors. Mates with bike Neutronix Speak ON lead I also ran. Covered pack in 3...
by sailah
Apr 09 2018 7:04am
Forum: E-Bike Build Threads / Photos & Video
Topic: Qulbix 76R build
Replies: 27
Views: 4474

Re: Qulbix 76R build

HI Merlin, I chose 25R based on a number of other bikes very similar to mine using same cell. Plus the pricing was best when I bought 250 from nkon. Finished up wiring. I decided to just use BMS for charging. Made up a nice charge lead with XT60, shrinkwrapped and sleeved. I also foamed up the batte...
by sailah
Mar 26 2018 7:35am
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Re: Looking for advice on my 18650 build so far

Thanks kdog. The more I think about BMS the more I'm inclined to bypass it. I have a controller with programmable LVC which is readable via bluetooth to my phone. I don't plan on pushing the battery to LVC limits, quite the opposite. So as I see it, the BMS really is just for balancing in my case si...
by sailah
Mar 26 2018 7:09am
Forum: E-Bike Build Threads / Photos & Video
Topic: Qulbix 76R build
Replies: 27
Views: 4474

Re: Qulbix 76R build

I always beef up all wires I can. I use #10 for phase and battery. This is for a 2500W setup. 60A battery and 120A phase. If you don't want to open the controller you still can cut the wires close to the case and splice some thick wires into them. Voltage drop is linear to cable length. So the shor...
by sailah
Mar 25 2018 5:31pm
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Re: Looking for advice on my 18650 build so far

No reason, was just tuning the charger using pots. Can easily get to 4.1V if needed, thx.

Here's a photo showing various controller, BMS and motor wires for size comparison
by sailah
Mar 25 2018 5:05pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Qulbix 76R build
Replies: 27
Views: 4474

Re: Qulbix 76R build

Not sure why other pic isn't working
by sailah
Mar 25 2018 4:58pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Qulbix 76R build
Replies: 27
Views: 4474

Re: Qulbix 76R build

OK time for an update. Winter just got busy but I'm back on it. Had to do quite a bit of machining on the Qulbix frame to get things back to my machinist idea of perfection. Here's how it sits: 20180325_143545.jpg Built the wheels up using 19 x 1.4 moto rims. Rear spoke were custom SS Buchanans to f...
by sailah
Mar 25 2018 4:08pm
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Re: Looking for advice on my 18650 build so far

Oh my gawd!! That battery! :shock: That bike is gonna scream once you have it going. That's gonna need one heck of a charger too. Thx, I hope so I just don't want to regret going small on components with how much time I have invested so far. I bought (2) Meanwell HLG-240-42 power supplies and tied ...
by sailah
Mar 25 2018 3:42pm
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Re: Looking for advice on my 18650 build so far

Says battery current to 70A, phase to 200A http://powervelocity.com/index.php?id_product=48&controller=product Honestly everything wiring wise looks wimpy. The controller wires are a magnitude thinner than the phase wires from the motor. And the BMS wires are also thin although there are 2 wires for...
by sailah
Mar 25 2018 11:42am
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Re: Looking for advice on my 18650 build so far

Here's pack awaiting final connections
by sailah
Mar 25 2018 11:40am
Forum: Battery Technology
Topic: Looking for advice on my 18650 build so far
Replies: 16
Views: 1056

Looking for advice on my 18650 build so far

Building a 20S12P pack for my Qulbix Q76R. Followed Quokka build pretty closely. (240) Samsung 25R cells 0.2mm pure nickel sheet Supower 100A BMS 8kw controller from PowerVelocity QS205 motor I've almost done all the spot welding just the +/- connections and BMS. I'm having second thoughts if I shou...
by sailah
Mar 24 2018 9:30am
Forum: Battery Technology
Topic: 100amp bms battery pack
Replies: 15
Views: 1371

Re: 100amp bms battery pack

Ridethelightning, I like your idea of running a moto rim and tire for the rear A LOT, but I am not seeing that option offered from anyone who is selling the QS205, or the Crystalyte Crown. Lets say I did find where I can even buy such rims and tire, Im not sure who could lace them up around a hub m...
by sailah
Mar 19 2018 4:22pm
Forum: Items for Sale - New
Topic: Smartphone EV trip dashboard + NAV - Android/iOS - $119
Replies: 162
Views: 16107

Re: Smartphone EV trip dashboard - Android/iOS - $99

Thanks Vad, Somehow my S5 doesn't like it, guessing it's me. I tried with an older iPhone a friend gave me and it works perfectly along with iPad I have another Android phone coming at me free so I'll check with that. BTW I love the dashboard, very clean. Can't wait to try it on the bike. Bike build...
by sailah
Mar 18 2018 4:51pm
Forum: Items for Sale - New
Topic: Smartphone EV trip dashboard + NAV - Android/iOS - $119
Replies: 162
Views: 16107

Re: Smartphone EV trip dashboard - Android/iOS - $99

I was wondering if anyone else has issues pairing with Android? I can find 2 options when trying to pair, directly from phone PowerVeloCity-i and PowerVeloCity-A. Assume -A is android and -i is iOS. I can "pair" thru my Samsung S5 and it prompts me for 1234 code. But when I open PowerVeloCity app, i...
by sailah
Feb 19 2018 8:29am
Forum: Battery Technology
Topic: n00b BMS hookup question
Replies: 3
Views: 367

Re: n00b BMS hookup question

Thanks Joachim, I was hoping it would be a simple answer. Your suspicions were mine as well, I thought the wire sizes looked pretty small too. Which is why I was asking if this was an appropriate sized BMS. There are no marking on the wire at all but I measured with my calipers and got 0.100 which a...
by sailah
Feb 18 2018 7:07pm
Forum: Battery Technology
Topic: n00b BMS hookup question
Replies: 3
Views: 367

n00b BMS hookup question

Hi, sorry if this is an easy one but I did search quite a bit. I'm building a 20S 12P pack for my Qulbix 76R. I took a break from Fall to now and everything I thought I knew (or bought) is now making me scratch my head. Cells are Samsung 25R, controller is an 18F Bluetooth from Powervelocity.com I f...
by sailah
Sep 23 2017 9:09am
Forum: E-Bike Build Threads / Photos & Video
Topic: Vlog Sweden riding hard snow 2018 update 17/3/2018
Replies: 30
Views: 4047

Re: Vlog Q76 Build 2017 Sweden uppdate 12/9/2017 vlog7

Hi rob, thanks for your info. I feel like I've already got a heavy bike with the QS205 motor and moto rims. Plus I'm not a lightweight either. I will get some spacers and see how I like it. I'm using a power velocity 18F controlller from Vad here in US. I'm still waiting on it. I was going to use ad...