Search found 48 matches

by Supersleeper
Feb 13 2015 2:55pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1676
Views: 484315

Re: Homemade Battery Packs

And that's why I don't like spot-welding them in place. I use compression clips so I can easily remove any cell.
by Supersleeper
Jul 25 2014 4:57pm
Forum: Alternative Energy
Topic: Low voltage application for alternative home power
Replies: 5
Views: 1180

Low voltage application for alternative home power

Hi Folks, I'm running solar in my home, and am tied to the grid to back-feed energy I don't use. This works great for balancing costs, but still a slave to the grid. If I lose power, I'm still out. What standards are available for high-efficiency low-voltage applications for wiring a home? I'd like ...
by Supersleeper
Feb 16 2014 4:25pm
Forum: Battery Technology
Topic: Lipo and 18650, I was shocked
Replies: 22
Views: 3374

Re: Lipo and 18650, I was shocked

Like I said, I've had a lot of luck running my 18650 (recycled laptops) batteries, and at only 2p was very stable and no hot spots anywhere. Checked with infrared thermometer on each and every battery. Now, this is with springs holders too. The new compression clips will carry significantly more cur...
by Supersleeper
Feb 16 2014 2:46am
Forum: Battery Technology
Topic: Lipo and 18650, I was shocked
Replies: 22
Views: 3374

Re: Lipo and 18650, I was shocked

Right, that's why I keep all 12s in a single bank, so there will never be enough current draw to cause that issue.
by Supersleeper
Feb 15 2014 10:03pm
Forum: Battery Technology
Topic: Lipo and 18650, I was shocked
Replies: 22
Views: 3374

Re: Lipo and 18650, I was shocked

Here's a photo of what I've got so far...
image.jpg
I'm looking to build-in a 12s charge socket and Anderson power pole adapter right off the end of the pcb. This will allow me to build a box that I can slider the pcb into, and easily remove for charging or maintenance.
by Supersleeper
Feb 15 2014 9:57pm
Forum: Battery Technology
Topic: Lipo and 18650, I was shocked
Replies: 22
Views: 3374

Re: Lipo and 18650, I was shocked

I've had much success with 18650 batteries. I'm developing a new 12s 2p PCB based off the following: http://www.aliexpress.com/snapshot/315573261.html These compression clips are much better than the typical spring clips as the compression clips place more force and has a higher contact area to the ...
by Supersleeper
Jan 13 2014 7:53pm
Forum: General Discussion
Topic: Brushed permanent magnet starter motor to play with
Replies: 4
Views: 569

Brushed permanent magnet starter motor to play with

Hi Folks, I've had my starter motor replaced, and asked to keep the original part. I found that the only thing wrong with the motor was the brushes wore out due to oil getting inside. I was going to drop by the parts store and get a new set of brushes for it. I don't have a lot of options with it's ...
by Supersleeper
Oct 23 2013 9:19pm
Forum: E-Bike General Discussion
Topic: Removable wheel hub motor
Replies: 7
Views: 538

Re: Removable wheel hub motor

01_22_iv250.jpg From a quality of life perspective, you might instead consider swapping out the DD for a gear motor so there is no drag when the motor is off. You can just switch off and pedal whenever you want... This is exactly what I was looking for! Good point on the geared motor. Reason I went...
by Supersleeper
Oct 23 2013 6:21pm
Forum: E-Bike General Discussion
Topic: Removable wheel hub motor
Replies: 7
Views: 538

Removable wheel hub motor

Hi folks, Not sure how to classify this thread as it's more of a versatility question. I have a front wheel drive wheel hub motor and wanted to make it easier to detach for days I want to go powerless. The motor adds a slight resistance and I don't want to bike to far with it attached and no battery...
by Supersleeper
Jul 17 2013 10:01pm
Forum: Battery Technology
Topic: Scalable BMS
Replies: 11
Views: 884

Re: Scalable BMS

So I'm a little confused, because 36v divided by 4 is 9. 36v pack would be 9s wouldn't it? 12 times 4 = 48 so 48v would be 12s. So fully charged my pack reads about 51v. I would think u would grossly undercharge a 12s pack for a 36v system.
by Supersleeper
Jul 08 2013 8:18pm
Forum: Battery Technology
Topic: Scalable BMS
Replies: 11
Views: 884

Re: Scalable BMS

dnmun wrote:no, i think the guy thinks of the battery voltage as 4V/cell. so he used 48v when most people would use 36v for a 12S pack.
My motor/controller is 48v rated and accepts 52v fully charged battery like most 48v systems do.
by Supersleeper
Jul 07 2013 12:52am
Forum: Battery Technology
Topic: Scalable BMS
Replies: 11
Views: 884

Re: Scalable BMS

Bump
by Supersleeper
Jul 06 2013 1:31am
Forum: Battery Technology
Topic: Scalable BMS
Replies: 11
Views: 884

Scalable BMS

Hi folks, I've built a 48v 12s 6p battery out of 18650s and am extremely happy with the performance. Now I'm looking for a simple way to charge and scale up as I am intending on going 8p soon. So I'm thinking a 12s 2p PCB BMS would be ideal as I link the batteries in 2p banks. I'm having a heck of a...
by Supersleeper
Jul 06 2013 1:03am
Forum: E-Bike Technical
Topic: Amp meter from amazon
Replies: 12
Views: 833

Re: Amp meter from amazon

And so incredibly bulky too in comparison. Wanted something a little more inconspicuous. I find the numbers on the LCD screens a bit too small too. This one i posted is no more than an inch tall, but the display of the numbers are still larger than the more expensive units.
by Supersleeper
Jul 05 2013 1:45pm
Forum: E-Bike Technical
Topic: Amp meter from amazon
Replies: 12
Views: 833

Re: Amp meter from amazon

If you didn't buy it yet don't. I can only guess, but it looks like the less desirable voltmeters. I'm not sure what you mean by less desirable. For me, I find those hobbyist amp meters far less desirable as the LCD displays are far to dificult to read at a glance while riding the bike. Not to ment...
by Supersleeper
Jul 05 2013 1:34pm
Forum: E-Bike Technical
Topic: Amp meter from amazon
Replies: 12
Views: 833

Re: Amp meter from amazon

Yeah, I saw the test voltage and not the working voltage. Oh we'll, this won't work on my bike. Maybe I'll use it in my car.
by Supersleeper
Jul 03 2013 11:58pm
Forum: E-Bike Technical
Topic: Amp meter from amazon
Replies: 12
Views: 833

Amp meter from amazon

Hi folks, This may or may not be obvious, but I am looking for a wire diagram for this guy: http://www.amazon.com/gp/product/B00CQHNKU2/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1 http://ecx.images-amazon.com/images/I/41vdj6zGBJL._SX342_.jpg http://ecx.images-amazon.com/images/I/41rtMXDvBwL._SX342_.jpg...
by Supersleeper
May 23 2013 1:33am
Forum: Battery Technology
Topic: Building my first 48v 18650 battery
Replies: 44
Views: 13205

Re: Building my first 48v 18650 battery

Tested my new 4P pack the other day on a 26 mile round trip with pedal assisted. The pack proves very stable. Added fuse bank and manual cutoff switch for safety. Collected several more laptop packs and will be working on my 6P pack shortly. My final challenge will be charging. Still charging these ...
by Supersleeper
May 23 2013 12:41am
Forum: E-Bike General Discussion
Topic: Chainless electric bike (alternator)
Replies: 10
Views: 1477

Chainless electric bike (alternator)

This bike really drove up my curiosity... http://www.gizmodo.com.au/2012/10/this-chainless-electric-bike-makes-you-the-backup-generator/ I've had a peaked interest in an electric recumbent trike and was thinking of a diy due to the costs. One of the larger problems with recumbent bikes are the exten...
by Supersleeper
May 17 2013 12:32pm
Forum: Battery Technology
Topic: Found LiPo battery
Replies: 4
Views: 492

Re: Found LiPo battery

If you're really interested in these things, I'll sell you a better one for a lot less. If you just want to mess with your free cell, be careful :wink: Oh, thanks for the offer. I'm actually re-purposing laptop 18650 batteries for my ebike. A co-worker of mine knew this and found this battery. I wa...
by Supersleeper
May 17 2013 10:33am
Forum: Battery Technology
Topic: Found LiPo battery
Replies: 4
Views: 492

Re: Found LiPo battery

I found the original. It's called the PowerPad 160:

Image

So, I should be able to charge this one good cell to 4.2v? I should be able to use my 18650 Li-Ion charger safely I suppose?
by Supersleeper
May 17 2013 1:06am
Forum: Battery Technology
Topic: Found LiPo battery
Replies: 4
Views: 492

Found LiPo battery

image.jpg I disassembled it and pulled out the individual cells. Clearly, one is in good shape, and it does hold a charge. The battery array was rated at 19v output. I'm assuming this is in series. There were four cells in total, so should I suspect that it's a 5 or 6 volt battery? Do these cells l...
by Supersleeper
May 15 2013 4:50pm
Forum: E-Bike General Discussion
Topic: Fire flasher 48v for lighting
Replies: 3
Views: 442

Re: Fire flasher 48v for lighting

dnmun wrote:maybe they will think you are a bicycle ambulance and you can run red lights. get cop stickers and nobody would steal it.
...LOL!! ROTFL!!!
by Supersleeper
May 15 2013 3:23pm
Forum: E-Bike General Discussion
Topic: Fire flasher 48v for lighting
Replies: 3
Views: 442

Fire flasher 48v for lighting

Company clearing out lot's of electronics, and found a couple of fire flashers not unlike this one... http://www.freeinteractivelearning.com/lessons/Intro_to_nec/fire_flasher_1_1.jpg Turns out they are 48v, which is perfect for my ebike, and it works! I may need to get a red or amber light diffuser ...
by Supersleeper
May 15 2013 3:11pm
Forum: Battery Technology
Topic: Looking at new bulk charging option for 18650
Replies: 2
Views: 405

Re: Looking at new bulk charging option for 18650

Yeah, not too concerned about that. I get the batteries free. I wish they had a 12s. Looks like I'll need to do 3 x 4s to get my 48v. I may just buy one for testing and see how well it functions.