Search found 1398 matches

by Lurkin
Feb 17 2019 11:38pm
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

All good, thanks AW, just need to find one to purchase now! 8)
by Lurkin
Jan 31 2019 7:26pm
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

What test do I conduct/ how do I know that the power supply ground is isolated from the charger?

If I use the bench ac to DC supply would it be testing continuity of GND on the AC wall plug to positive or negative of the DC output?
by Lurkin
Jan 27 2019 1:42am
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

I understand you are saying that two of these cannot be used unless their source is isolated. How do I do this? Major is commenting in another thread that the negative is common to the first channel. Does this mean that even if the sources are isolated, the six channels are not? if so, what can I do...
by Lurkin
Jan 27 2019 1:38am
Forum: Battery Technology
Topic: BMS Connections
Replies: 2
Views: 129

Re: BMS Connections

There's a suggestion on here that https://endless-sphere.com/forums/viewtopic.php?f=1&t=83991&p=1229712#p1229712 There's a lot of choices. Years ago I needed to use a specified connector for a contract job and got the proper hand crimp tool. I just stuck with using that same connector for like 10 or...
by Lurkin
Jan 27 2019 12:42am
Forum: Items for Sale - Used
Topic: bbs02 parts and giant dh comp frame Sydney AUS
Replies: 4
Views: 425

Re: bbs02 parts and giant dh comp frame Sydney AUS

Hi Beauie

What size is the frame? Please also measure from seatpost to crank

Thanks

Roy.
by Lurkin
Jan 27 2019 12:30am
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

Here we go, looks like this has been covered before. I'd be wanting to do something like this (thank you mistercrash): https://endless-sphere.com/forums/viewtopic.php?t=50581#p748655 http://i177.photobucket.com/albums/w202/mistercrash1964/Motorino/Batteries%20and%20chargers/13s_18650_zps9e35d277.jpg
by Lurkin
Jan 27 2019 12:23am
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

I guess just thinking out loud to avoid the isolation issue. Get a plug back with an appropriate voltage (i.e. 4v is fine for me, not fussed about the .2) which can charge at 1a ish and attach to each group, charging them individually by connecting it to each parallel group then moving onto the next...
by Lurkin
Jan 27 2019 12:18am
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

This battery was originally intended for a bike which would be used for commuting. Periodically I work crazy hours and its very easy to make mistakes when I am that tired. Equally any time I spend error checking or being less confident is less charge time. My previous setup was a em3ev battery with ...
by Lurkin
Jan 26 2019 10:49pm
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Re: Expected BMS Behaviour

Hi AW!!! Happy New Year! awesome to see you posting again last time I was on here you were taking a hiatus but its just great to see you again! There isnt really any information about how it works. It does have some parameters but its not a description of how the charge process works. I'd paste it h...
by Lurkin
Jan 26 2019 10:14pm
Forum: E-Bike Technical
Topic: Expected BMS Behaviour
Replies: 13
Views: 285

Expected BMS Behaviour

I have finished the spot welding on a 13S8P pack and I am bench testing a BMS with a 13S1P pack to test and make sure it actually works and will manage the cell groups during charging. I have the BMS Connected to the pack based on the instructions for it (nothing unusual there) and have the BMS conn...
by Lurkin
Jan 26 2019 3:39am
Forum: Battery Technology
Topic: BMS Connections
Replies: 2
Views: 129

BMS Connections

I am in the process of finishing off building a 13S8P pack. I have a BMS which I have now tested with a 13S1P pack and whilst it functions fine for balancing, it lacks any form of bluetooth communication, LCD screen, logging etc. I want to be able to easily change to a different BMS at a later stage...
by Lurkin
Aug 10 2018 7:29am
Forum: EV Business World
Topic: Luna Cycle's "world's safest battery" lacking MSD
Replies: 33
Views: 2503

Re: Luna Cycle's "world's safest battery" lacking MSD

I've only ever seen MSDS for individual cells from the cell manufacturer. I cant say I've seen one at the pack level. I would have thought if you know the cells in the pack you can obtain the MSDS for them from the cell manufacturer. Its been a long time since I've bought a pack - I've built my own ...
by Lurkin
Aug 10 2018 7:08am
Forum: E-Bike General Discussion
Topic: Who here has/uses a Spoke Tension Meter?
Replies: 12
Views: 522

Re: Who here has/uses a Spoke Tension Meter?

When I started truing and building my own wheels, a number of books and threads recommended pinging the spokes and listen for the note made in the sound to understand their tension. I found this pretty frustrating and not particularly successful despite being in full agreement with the theory, proba...
by Lurkin
Jun 30 2018 7:29am
Forum: Endless-Sphere Wiki
Topic: How many of you really use the wiki?
Replies: 69
Views: 7370

Re: How many of you really use the wiki?

I find the information on the forum too scattered. The wiki provided some cohesion in some areas, and I remember consulting couple times at some point. I think it is very underutilised and on my eyes that is a fail because I see forum posts in internet era like 'tacit knowledge' and wikis as explic...
by Lurkin
Jun 29 2018 7:20pm
Forum: E-Bike Non-hub Motor Drives
Topic: Bafang BBSxx - fault finding and fixes
Replies: 1037
Views: 144792

Re: Bafang BBSxx - fault finding and fixes

My dolphin pack connect socket did exactly the same thing. I trawled the internet for hours to try and find an exact replacement - no dice. Molex was a close as it would get that was attainable directly I gave up, contacted Em3ev to obtain replacement parts. It was caused by the socket coming loose ...
by Lurkin
May 20 2018 3:35am
Forum: E-Bike Non-hub Motor Drives
Topic: BBS Brake Cut Off Wiring Question
Replies: 1
Views: 251

BBS Brake Cut Off Wiring Question

I've got some brake lever which incorporate a reed switch as a ebrake cut off. They use a two wire reed switch. I want to use them on a BBS01 kit, which has a three wire reed switch female higo connection. Can I use these two wire reed switches instead of the hall sensors? which wires to go which in...
by Lurkin
May 06 2018 5:47am
Forum: E-Bike General Discussion
Topic: Found/Abondoned Bicycles
Replies: 26
Views: 1583

Re: Found/Abondoned Bicycles

Yeah, they call these place bike co -ops - usually non profit, charity type organisations. Definitely worth looking into, for cheap donor bikes for projects. Yep, have picked up a few from places like this, the most recent an urban crusier style bike which still had the Shimano green dollops of grea...
by Lurkin
May 06 2018 5:29am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSxx on Big Hit donor
Replies: 9
Views: 1169

Re: BBSxx on Big Hit donor

Very nice work, the gap at the top creates an EOM vibe to this, really like your framework! 8)

Did you replicate the Bighit's geometry or depart from it?
Would it be possible to see some more of inside the battery area?

I think building my own frame will be on the cards for the next project!
by Lurkin
Apr 28 2018 4:46am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 536
Views: 69243

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

..... the rough plan is to put it in an early MR2 like this: 1989-AW11-Toyota-MR2-Supercharged-01.jpg. Light, RWD, simplistic, some compartmentalised space for batteries. Won't have tons of range, but hoping to go fast.. I used to have the n/a version back in the day. Flying wedge! Would be a good ...
by Lurkin
Apr 27 2018 2:28am
Forum: Battery Technology
Topic: Yet another 18650 battery build.
Replies: 71
Views: 3591

Re: Yet another 18650 battery build.

Sage advice. I built a (slightly wobbly) workbench out of some leftover wooden shelving and wood scraps specifically to spot weld on - to avoid putting things on a bench with bits of wire, grease etc which might conduct 8) I like the the tools warnings - the electrical tape tip ftw. The plan is to s...
by Lurkin
Apr 26 2018 6:04pm
Forum: Battery Technology
Topic: Yet another 18650 battery build.
Replies: 71
Views: 3591

Re: Yet another 18650 battery build.

... If I was to start from scratch I'd be wanting to use Sketchup. Thank you for your advice - got it done in Sketchup. Pretty blown away at how user friendly it was, its been a few years since I've touched a CAD program and that was definitely easier to use than the old versions of AutoCAD. I've l...
by Lurkin
Apr 26 2018 6:21am
Forum: E-Bike General Discussion
Topic: 48 Volt Rear Hub Build
Replies: 47
Views: 3188

Re: 48 Volt Rear Hub Build

Mudhugger guard would be super nice, but its a pretty expensive option. A guard on the front wheel is the most effective way to keep water off the controller. Failing that a guard over the controller is an option. If all else fails, and you are caught out in the rain - pinch a dog poo bag from a dog...
by Lurkin
Apr 26 2018 4:10am
Forum: E-Bike Technical
Topic: Dolphin battery case connector
Replies: 3
Views: 500

Re: Dolphin battery case connector

I mucked around with this for hours without complete success. Molex connectors were as close as it came.

Contact em3ev, they assisted me with mine.
by Lurkin
Apr 26 2018 12:01am
Forum: Battery Technology
Topic: Common pack design mistakes, how to avoid?
Replies: 241
Views: 31298

Re: Common pack design mistakes, how to avoid?

I'm trying to put my first pack together this weekend. Any chance of some feed back re current sharing etc? the framing represents the cell spacers I have and I will be using nickel strip spot welded to each cell. I'm still debating the number of layers of nickel strip vs soldering on copper wire or...
by Lurkin
Mar 15 2018 5:45am
Forum: Battery Technology
Topic: Wire bonding, instead of spot-welding (like Tesla)
Replies: 18
Views: 4729

Re: Wire bonding, instead of spot-welding (like Tesla)

t Luna Cycle has announced that all their fusion batteries are being wire bonded in the USA. http://www.electricbike.com/luna-cycle-announces-wire-bonded-ebike-battery-packs/ Slowly catching up with their competition, I have a few reservations about the fusible link in a potting compound but good o...