Search found 1436 matches

by deVries
May 29 2010 3:05pm
Forum: E-Bike General Discussion
Topic: Anybody used the Cute motors yet?
Replies: 43
Views: 4163

Re: Anybody used the Cute motors yet?

Hi Gary, I live in Austin and have got to climb some hills in the heat too. :mrgreen: Which Cute motor do you have? What controller? Seems your setup will do steep hills but speed is under 20mph? Top speed is? You're using 48v? Thanks for any update you can provide. Thanks. Hi GrayKard, What is clim...
by deVries
May 27 2010 11:23pm
Forum: E-Bike Build Threads / Photos & Video
Topic: The Falcon, My 1st Build
Replies: 27
Views: 8471

Re: The Falcon, My 1st Build

looks like a very nice ride :D well done Thanks much!! It does ride well, but at higher speeds, being a hard tail, it's really rough on the ole back. That's why I got a Thudbuster to go on it next week. We'll see if all the hype is worth it. :wink: When you get a chance, please give us a performanc...
by deVries
May 27 2010 12:44am
Forum: E-Bike Reviews & Testing
Topic: ALL NEW 150V-30A XieChang CONTROLLER
Replies: 32
Views: 7350

Re: ALL NEW 150V-30A XieChang CONTROLLER

6-fets = 25 amps 12-fet = 50 amps ball park prices (less $$ if you are INSANE!) :mrgreen: :lol: Can the shunts be modded on these two with more solder/wire to carry more amps AND not fry something on the controller? What can these handle for so called burst amps before doing any shunt mod? How many...
by deVries
Jul 03 2009 1:56pm
Forum: Battery Technology
Topic: Fuseable Battery Bar Cell Connection Designs & Sources
Replies: 9
Views: 1064

Fuseable Battery Bar Cell Connection Designs & Sources

The fuseable link in the images above which I originally posted (in reply to a question from AndyH in another thread)is from a BMI HPS factory battery pack. If anyone wants these links just ask and I can certainly order them from the factory. Thanks for posting that pic, which is linked/posted from...
by deVries
Jul 03 2009 5:34am
Forum: Battery Technology
Topic: Fuseable Battery Bar Cell Connection Designs & Sources
Replies: 9
Views: 1064

Fuseable Battery Bar Cell Connection Designs & Sources

i could see it usefull for cars but ebike packs are generally small and accessable enough to run away from if the worst happens. i think the tesla has fusable 18650 cells though. in a bike crash you would be thrown from the bike. in a car crash you might be trapped in the car so its more important ...
by deVries
Jul 02 2009 9:11pm
Forum: Battery Technology
Topic: Fuseable Battery Bar Cell Connection Designs & Sources
Replies: 9
Views: 1064

Fuseable Battery Bar Cell Connection Designs & Sources

If I get into a crash bad enough to get to my batteries and create a pack destroying short, then a lost pack will be the least of my worries. Instead of fuseable links one should spend than time and money on proper mirrors, brakes, lights, brake lights, and turn signals. The bottom line is that the...
by deVries
Jul 02 2009 7:53pm
Forum: Battery Technology
Topic: Fuseable Battery Bar Cell Connection Designs & Sources
Replies: 9
Views: 1064

Fuseable Battery Bar Cell Connection Designs & Sources

It came to my attention that even a123 26650 cells can suffer an internal short inside a battery pack. I know of someone that is building EV-car size batteries using these cells and is "fusing" each and every cell with the battery bar connected between every cell that is also designed "to melt" in a...
by deVries
Jul 01 2009 1:30pm
Forum: Battery Technology
Topic: Best source for copper bars?
Replies: 29
Views: 2703

Re: Best source for copper bars?

at that point, fuses get expensive, and its better to waterjet/etch/lasercut "fuseable links" on the plate so they melt if one cell fails and dumps the current from the other n-number of cells. Good point frodus. :mrgreen: For those of us without any technical reference to go to, I couldn't find on...
by deVries
Jun 19 2009 4:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: Friction drive outrunner setup. New DJ bike.
Replies: 360
Views: 76364

Re: Friction drive outrunner setup

Quick photo of the test setup: http://farm4.static.flickr.com/3346/3622731070_f999b6f108_o.jpg The final version will be hidden by my panniers (with the batteries mounted low inside them) so I thought I better get a picture before there's nothing to see. Hey Todd, I'm so impressed with this design ...
by deVries
Jun 17 2009 11:05pm
Forum: E-Bike Build Threads / Photos & Video
Topic: P R O J E C T "Y" KILLABICYCLE World record 17 june 2009
Replies: 167
Views: 26555

Re: P R O J E C T "Y" KILLABICYCLE World record 17 june 2009

UPDATES! :mrgreen: My bicycle DOES HAVE PEDAL !!!.. His "bicycle doesn't have pedal... THIS IS NOT A BICYCLE!... So in fact... I have the true eBicycle that have the 58.6MPH guys!! :mrgreen: 8) Recorded current: 170A.. min Volt 87.9V.. front wind: 25kph :roll: Awesome!!! Congratulations! :P You are...
by deVries
Jun 06 2009 4:51am
Forum: E-Bike General Discussion
Topic: Taller forks for an x5tracycle?
Replies: 12
Views: 2186

Re: Taller forks for an x5tracycle?

Alternative front/rear geometry or handling ideas... I know of someone that is an expert rigid fork maker and charges $250 plus shipping. You could put a 3" tire or more to fit inside the new fork and run it at lower pressure for shock absorption. You would get a custom height and rake and strong ri...
by deVries
Aug 12 2008 8:56pm
Forum: Battery Technology
Topic: Another Li-Mn Konion battery pack built !! 810Wh
Replies: 5
Views: 1623

Re: Another Li-Mn Konion battery pack built !! 810Wh

Hi Doc, In another post you mentioned using a 'genetics math based' software program you were testing to use to balance your parallel packs so each pack would be closely matched with all the others. Have you had success using this method? Is it something other battery builders could use, or could yo...
by deVries
Aug 03 2008 10:14pm
Forum: Battery Technology
Topic: Safe Procedures to Connect Disconnect Battery & Reconfigure
Replies: 3
Views: 575

Re: Safe Procedures to Connect Disconnect Battery & Reconfigure

No problem with using jumpers. Ypedal does something similar, IIRC. He's got a pair of andersons on every cell that hooks up to the chargers and gets reconfigured to the proper voltage when riding. Color code your connectors, and if using andersons arrange the connectors to prevent accidental short...
by deVries
Aug 03 2008 1:19pm
Forum: Battery Technology
Topic: Safe Procedures to Connect Disconnect Battery & Reconfigure
Replies: 3
Views: 575

Safe Procedures to Connect Disconnect Battery & Reconfigure

Since this topic of safety and battery wiring-connection procedures is not thoroughly covered in its own thread, I'm starting this thread using my battery design & reconfiguration problem for charging as an example. I know there are more sophisticated methods to use diodes, relays, or switches to re...
by deVries
Aug 03 2008 9:55am
Forum: Battery Technology
Topic: 250W 36 or 42V charger/balancer for 100$
Replies: 32
Views: 4321

Re: 250W 36 or 42V charger/balancer for 100$

Thanks ZapPat... don't want to short anything... switching to another possibility... Crazy... :D :P ? ->Could one set-up a series 'jumper plug' that when unplugged all the series connections are open/unconnected. Then just plug-in the 'jumper plug' to reconnect the series wiring? Same idea for the ...
by deVries
Aug 02 2008 5:36pm
Forum: Battery Technology
Topic: 250W 36 or 42V charger/balancer for 100$
Replies: 32
Views: 4321

Re: 250W 36 or 42V charger/balancer for 100$

A Great cheap charging solution! 250W balancing at 5A 10s charger for less than 100$ Buy: http://cgi.ebay.com/BTC-POWER-CONVERTER-DC-DC-48V-IN-5V-OUT-25W-10PCS-NEW_W0QQitemZ330234173452QQihZ014QQcategoryZ36338QQssPageNameZWDVWQQrdZ1QQcmdZViewItem combine with: http://cgi.ebay.com/350W-48V-7-2A-Swit...
by deVries
Aug 02 2008 3:31pm
Forum: Battery Technology
Topic: 250W 36 or 42V charger/balancer for 100$
Replies: 32
Views: 4321

Re: 250W 36 or 42V charger/balancer for 100$

A Great cheap charging solution! 250W balancing at 5A 10s charger for less than 100$ Buy: http://cgi.ebay.com/BTC-POWER-CONVERTER-DC-DC-48V-IN-5V-OUT-25W-10PCS-NEW_W0QQitemZ330234173452QQihZ014QQcategoryZ36338QQssPageNameZWDVWQQrdZ1QQcmdZViewItem combine with: http://cgi.ebay.com/350W-48V-7-2A-Swit...
by deVries
Aug 01 2008 3:49pm
Forum: Battery Technology
Topic: Steveo's Dewalt A123 Individual 200+ cell testing...
Replies: 5
Views: 1519

Re: Steveo's Dewalt A123 Individual 200+ cell testing...

Oh I forget!!! Please wait if you can before to asssemble your pack!! I will get the completed version of my cells matching software!!! My friend Eric is working on it to update it and to get better statistic calculation and is also based like the DNA network calculations!! The goal is to assemble ...
by deVries
Aug 01 2008 2:16am
Forum: Battery Technology
Topic: Help Design Booster Multi Dual Batt Pack -> 60v 88v Maybe ?
Replies: 3
Views: 709

Re: Help Design Booster Multi Dual Batt Pack -> 60v 88v Maybe ?

So, here is my design diagram using 64 A123s and 2 Milwaukee 28v packs. Hope many will offer their design ideas, and, yes, critiques are 'the most' welcomed too for improvement. :mrgreen: TIA :P I'm afraid I don't quite follow the diagram. It probably helps here to go back to basics. Like Docbass, ...
by deVries
Jul 31 2008 10:37pm
Forum: Battery Technology
Topic: Help Design Booster Multi Dual Batt Pack -> 60v 88v Maybe ?
Replies: 3
Views: 709

Re: Help Design Booster Multi Dual Batt Pack -> 60v 88v Maybe ?

In my notes for the diagram I wrote: Note: I did 8pack groupings with 2series + 4parallel. I did the 2series because I theorize these will stay well balanced in pairs, rather than going with 4p1s packs. Experienced battery builders can comment if I'm totally off-base here. I am just wild-guessing wi...
by deVries
Jul 31 2008 7:49pm
Forum: Battery Technology
Topic: Ideal Diodes for battery combining/switching
Replies: 13
Views: 3227

Re: Ideal Diodes for battery combining/switching

My booster pack long-ride pack will consist of 2 Milwaukee 28v packs that are in parallel adding about 5ah @28v, and my daily pack will top-off at 59v 8-9ah and start running nominal in the mid-50's, I'm guessing. So, adding that 2pack of parallel Milwaukee's in series to the main pack will cause t...
by deVries
Jul 31 2008 7:42pm
Forum: Battery Technology
Topic: Help Design Booster Multi Dual Batt Pack -> 60v 88v Maybe ?
Replies: 3
Views: 709

Help Design Booster Multi Dual Batt Pack -> 60v 88v Maybe ?

I was on another thread when Nick asked... My booster pack long-ride pack will consist of 2 Milwaukee 28v packs that are in parallel adding about 5ah @28v, and my daily pack will top-off at 59v 8-9ah and start running nominal in the mid-50's, I'm guessing. So, adding that 2pack of parallel Milwaukee...
by deVries
Jul 31 2008 9:05am
Forum: Battery Technology
Topic: Ideal Diodes for battery combining/switching
Replies: 13
Views: 3227

Re: Ideal Diodes for battery combining/switching

[ I need to add two different voltage packs in series for long rides, so I want to be able to connect/disconnect the add-on batt-pack from the bike. TIA, deVries To add extra capacity for a long ride, the way to do it is to combine the packs in parallel. That's the classic situation that you use co...
by deVries
Jul 30 2008 10:40am
Forum: Battery Technology
Topic: Ideal Diodes for battery combining/switching
Replies: 13
Views: 3227

Re: Ideal Diodes for battery combining/switching

Hi All, You may have seen this already. I was thinking about how to use FETs instead of Schottky diodes to combine batteries. I concluded it was workable and would save energy but was a bit complex. Now I've just discovered Linear are making ICs to do just that. http://www.linear.com/idealdiodes I ...
by deVries
Jul 29 2008 10:09am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27282

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

So I'm pretty much ready to release a new version of the Cycle Analyst firmware, at least in a beta phase. The original plan was to incrementally add various new features over the year for V2.1, 2.2, 2.3 etc. but when I got into upgrading the code a couple weeks ago, well I couldn't stop myself unt...