Search found 71 matches

by BrandonB
Jan 15 2018 2:48pm
Forum: Items for Sale - Used
Topic: High Quality LiFePo4 cells in bulk for sale, NC
Replies: 1
Views: 545

High Quality LiFePo4 cells in bulk for sale, NC

I work in racing, and obtained these packs that are no longer in use. The cells contained within the packs are these: http://www.batteryspace.com/high-power-lfp-polymer-cell-3-2v-10ah-8790160-5c-32wh-50a-rate-un38-3-passed-dgr.aspx The cells in each pack are ohm matched and of the same date code. So...
by BrandonB
Oct 11 2017 8:17pm
Forum: Items for Sale - Used
Topic: Genuine Mean Well 12V PSU and Curtis 1231C EV Controller
Replies: 0
Views: 261

Genuine Mean Well 12V PSU and Curtis 1231C EV Controller

Genuine Mean Well Power Supply, model SP-480-12. Was mounted under the hood of an electric car so has scratches and a tiny bit of surface rust on some of the terminal screws, but works great. Listed at $147 on Mouser before shipping, get a deal on this genuine used unit at $85 shipped. Curtis 1231C ...
by BrandonB
Aug 22 2017 2:42pm
Forum: Items for Sale - New
Topic: All sold!
Replies: 11
Views: 1328

Re: 20" rear 250w 36v kits with battery

Jay, I will take it if it's not gone. Sent you a PM.
by BrandonB
Aug 14 2017 3:16pm
Forum: Items for Sale - Used
Topic: GM 20" MP2 and MP3 for sale
Replies: 3
Views: 647

Re: GM 20" MP2 and MP3 for sale

Interested in a Pie if shipping is on the table.
by BrandonB
May 04 2015 6:31pm
Forum: E-Bike Build Threads / Photos & Video
Topic: I cheated this time
Replies: 5
Views: 742

Re: I cheated this time

A suspension seat would be really nice. I have a brooks seat on a foot-powered Raleigh Twenty, and boy is it nice. The noseless seat is a standard item in the bike section of Wal Mart for $20. For larger people like me, it makes all the difference in the world. I think most bike seats are made for r...
by BrandonB
May 04 2015 5:01pm
Forum: E-Bike Build Threads / Photos & Video
Topic: I cheated this time
Replies: 5
Views: 742

I cheated this time

Wanted to get back into the game on the cheap, to help me get back in shape. Looking around, technology has made big leaps since 2009, but there aren't any more $250 shipped 9C kits kicking around. I scoured eBay until I came across this bike, a Schwinn Transit Electric 700C. Has a 24 volt lithium p...
by BrandonB
Apr 28 2015 8:04am
Forum: E-Bike Technical
Topic: help swapping from yescom 48V controller to Lyen 12 FET
Replies: 4
Views: 686

Re: help swapping from yescom 48V controller to Lyen 12 FET

The black/green/red wires on the three pin connector is for your throttle, that is standard wire coloring for an ebike throttle. The other two wires on the smaller connector, the red and black, are probably just a feed directly from the battery to the throttle. The circuitry to display the battery v...
by BrandonB
Feb 06 2013 9:55pm
Forum: Battery Technology
Topic: Bioenno Power Cells ?
Replies: 1
Views: 461

Re: Bioenno Power Cells ?

I have inquired to multiple places about these batteries. Bienno Power, Stark Power, Powerizer, Clean Energy. All of them are, from what i have read into and called and asked about, imported from Asia and rebranded. There are many of them on AliBaba for sale; mostly from what I read people doing the...
by BrandonB
Jan 20 2013 2:21pm
Forum: E-Bike Technical
Topic: Yescom Kit 36V Controller internals revealed
Replies: 15
Views: 1592

Re: Yescom Kit 36V Controller internals revealed

The controller probably has a preset amp limit, from the looks of it mine will definitely do more than the 500 watts it is marked, but if it's programmed to do 500 watts, that's what it will do, or at least that's what I am under the impression of. Get a Lyen controller if you want a good programmab...
by BrandonB
Jan 19 2013 9:32pm
Forum: E-Bike Technical
Topic: Yescom Kit 36V Controller internals revealed
Replies: 15
Views: 1592

Re: Yescom Kit 36V Controller internals revealed

Going by that figure and the fact that it has twelve FETs, how much current would you estimate it could safely handle continuously? Surely more than 15 amps?
by BrandonB
Jan 19 2013 9:06pm
Forum: E-Bike Technical
Topic: Yescom Kit 36V Controller internals revealed
Replies: 15
Views: 1592

Yescom Kit 36V Controller internals revealed

Here are pictures of it, for those who are interested. 12 FET controller, caps were 63V. FETs marked as STI 80NF70. Many wires removed, including some unused, three throttle inputs (?), output voltage indicator, extra brake cut that was on the throttle. Last picture is of my own doing, I pinned out ...
by BrandonB
Mar 17 2011 2:52am
Forum: Battery Technology
Topic: What have I done wrong???
Replies: 8
Views: 595

Re: What have I done wrong???

I am tired of messing with these cells. Must have a damn ghost inside them. Every single cell reads good and charged to 2+ Ah. I have already dumped a month into these and will spend no more time with them. Anyone who wants them can have them for the cost of shipping. PM Me.
by BrandonB
Mar 17 2011 2:13am
Forum: Battery Technology
Topic: What have I done wrong???
Replies: 8
Views: 595

What have I done wrong???

I have spent all night working on this piece of shit battery, and after getting it done, it reads 4 volts at the outermost two points, where it should read 40V. On the next two innermost points (8s) I get 24V, like it is only 6S! Measured at any 9S, I get 32V, like an 8S pack.. There are no dead cel...
by BrandonB
Mar 15 2011 10:48pm
Forum: Battery Technology
Topic: Setting up for single cell testing..
Replies: 11
Views: 564

Re: Setting up for single cell testing..

I have attached a picture of what I use in case you wanted to try something else. A "MetroPCS" standalone cell phone battery charger I purchased from eBay for a whopping $3.50 shipped. I took it apart and ran clipleads out of the original contact holes to charge any battery with tabs. The circuit in...
by BrandonB
Mar 10 2011 7:09pm
Forum: Battery Technology
Topic: Name that BMS!
Replies: 2
Views: 546

Re: Name that BMS!

It is indeed the O2 micro chip after further inspection. A little easier (hopefully) question...anyone got a wiring diagram of the pinout?

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Thanks,
Brandon
by BrandonB
Mar 09 2011 4:21pm
Forum: Battery Technology
Topic: Name that BMS!
Replies: 2
Views: 546

Name that BMS!

Can anyone help me out here? Specifically looking for the wiring diagram, any features, and the current limit. Came off of a working 36v (10S) Li-Ion pack.

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Thanks,
Brandon
by BrandonB
Mar 03 2011 12:46pm
Forum: E-Bike Technical
Topic: Using Accucel-8 as a BMS?
Replies: 5
Views: 445

Using Accucel-8 as a BMS?

BMS: ~$40 for cheapest Charger: ~$50 for cheapest Total: $90 Accucel 8: $45 If I'm using an 8s pack (I am), why couldn't I just leave an accucel 8 hooked up to it all the time to balance the batteries and charge them both, instead of buying a low end BMS and charger? The Accucel chargers have a grea...
by BrandonB
Feb 28 2011 12:26pm
Forum: Battery Technology
Topic: Venturing into the world of inexpensive LiCo batteries...
Replies: 8
Views: 907

Re: Venturing into the world of inexpensive LiCo batteries..

GREENIES! All 2.4V or more, most 3+! All tested good! The Dell BMS did it's job!

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by BrandonB
Feb 25 2011 9:54pm
Forum: Battery Technology
Topic: Venturing into the world of inexpensive LiCo batteries...
Replies: 8
Views: 907

Re: Venturing into the world of inexpensive LiCo batteries..

The infamous Dell power indicator on the battery will help me out a lot, if it still works. I am hoping they are still holding enough of a charge for it to...even though that's a far stretch. Just so I've got my bases covered here...These batteries like to be charged at 3.7 volts, and a safe rate is...
by BrandonB
Feb 24 2011 3:07pm
Forum: Battery Technology
Topic: Venturing into the world of inexpensive LiCo batteries...
Replies: 8
Views: 907

Venturing into the world of inexpensive LiCo batteries...

Just bought five of these for a total of $52 shipped: http://www.legendmicro.com/store/more_info.asp?Product_ID=6019&OpenTreeBranches=0&SortBy=0 A 12 cell pack @ 5.4Ah and 14.8V tells me that there are 1.8Ah cells inside the pack, in a 4S3P configuration. 5 packs at 12 cells each gives me 60 cells, ...
by BrandonB
Feb 20 2011 8:46pm
Forum: Battery Technology
Topic: Tekocell Li-Po batteries?
Replies: 4
Views: 390

Tekocell Li-Po batteries?

While surfing eBay, I stumbled upon these: http://cgi.ebay.com/Tekocell-Li-Po-Battery-Cells-10Ah-3-9V-Litium-Ion-/360268666468?pt=LH_DefaultDomain_0&hash=item53e1af9664 I made an offer, then later retracted it. I don't have the money to throw at a battery that may not be sufficient, but maybe someon...
by BrandonB
Jun 03 2010 1:53am
Forum: Battery Technology
Topic: Prius Batteries - How to make them work
Replies: 149
Views: 43573

Re: Prius Batteries - How to make them work

I am still in the process of cycling all the cells to find 5 of them with close enough capacity to each other to use in a 5S pack. They provide promising results at a 25 amp discharge, though. I'm a tad busy at the moment (assuming you were talking about me) but I definately plan to use them in some...
by BrandonB
May 27 2010 1:02am
Forum: Battery Technology
Topic: Prius Batteries - How to make them work
Replies: 149
Views: 43573

Re: Prius Batteries - How to make them work

Today, I did the final testing on the first cell. I ended up with a capacity of around ~2600 mah after 3 or so cycles at a low charge and discharge rate. I decided to put the battery to a test, so I did a few cycles at 6A charge and 20A discharge. The good news is that the battery never got hotter t...
by BrandonB
May 25 2010 10:02pm
Forum: Battery Technology
Topic: Prius Batteries - How to make them work
Replies: 149
Views: 43573

Re: Prius Batteries - How to make them work

I recently bought 11 cells off of ebay untest for the paltry sum of $27.50 shipped. When they arrived, I was pleasantly surprised to find that 8 of them were holding a recoverable voltage (4.9V+). I took the a battery with a moderately high voltage (7.2V) and immediately started peak charging it wit...
by BrandonB
May 07 2010 1:01pm
Forum: E-Bike Technical
Topic: Cheap Controller Base
Replies: 1
Views: 637

Cheap Controller Base

Recently I bought a floor buffer motor on eBay to toy around with driving a motor through the gears on my bike in an attempt to get more torque. The only brushed controller I have is the huge YK42-3 that I did not want to or have the room to use. I spent a few days scouring eBay to find the cheapest...