Search found 13 matches

by usatracy
Oct 25 2008 11:06pm
Forum: E-Bike Technical
Topic: How? Cycle Analyst to Crystalyte Cntrller to limit current?
Replies: 21
Views: 2326

Re: How? Cycle Analyst to Crystalyte Cntrller to limit current?

The approach from usatracy in visfor... is different. He feeds the 5V supply (red line from the controller) into the CA. Only the experts here and possibly Just could explain / approve this method. I could imagine that this could cause an overload on the CA, but i dont know. I first did this back i...
by usatracy
Oct 25 2008 10:56pm
Forum: E-Bike Technical
Topic: 2kw 2 speed brushless hub motor
Replies: 20
Views: 4232

Re: 2kw 2 speed brushless hub motor

It is an amazing little motor for what it is, we have gotten 45 mph out of it with the right tire. With that said, I would actually slow it down to 41.5 mph top speed due to heat build up by using a SMALLER tire on the motor. We have fielded dozens of bikes based on that motor controller in 48 and 6...
by usatracy
Oct 25 2008 10:43pm
Forum: Battery Technology
Topic: Have you noticed this?
Replies: 21
Views: 2180

Re: Have you noticed this?

When you have a bunch of cells in a string, the ones nearest to the + end of string wear out a little faster This is absolutely positively TRUE. I was convinced it was true, I let the experts convince me it was not true, then, after MANY MANY bikes moved and batteries tested, I am convinced it is tr...
by usatracy
Oct 25 2008 10:35pm
Forum: Battery Technology
Topic: Have you noticed this?
Replies: 21
Views: 2180

Re: Have you noticed this?

LOL PJD is right, I AM an arrogant fool who is clueless... Byt the way, I have created a single cell BMS for TS cells that is working out great. It sits on top of the cells and does not add to the height. It can remove up to 10 amps but I limit it to 2 amps due to heat concerns but if your applicati...
by usatracy
Oct 25 2008 10:12pm
Forum: Battery Technology
Topic: anybody bought pack from Cyclone-tw?
Replies: 15
Views: 1835

Re: anybody bought pack from Cyclone-tw?

I ordered a BMS (60 volt) and a lead acid balancer 60 volt. We agreed the lead acid balancer would ship later got the bms for TS cells, it was a 16 and a 8 unit bolted together for 20 cells hooked it all up and it did something.... did extensive testing and found some cells were moving amps to balan...
by usatracy
Nov 04 2007 2:48am
Forum: Battery Technology
Topic: Yesa
Replies: 145
Views: 25187

YESA

Yeah, Don has been a member of the V forum for 2 weeks now, and in less than 2 days we have hashed out a lot of info on LifeBatt and YESA. You can review it here... http://visforvoltage.org/forum/2226-lifebatt-now-taking-preorders and here.... http://visforvoltage.org/forum/2296-lifebatt-real-calcul...
by usatracy
Sep 27 2007 11:56pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

Rate, a battery that can provide 38 amps over 20 hours by delivering 1.9 amps per hour for 20 hours can't necessarily deliver all 38 amps in only one hour. If his bike draws 50 amps, and he wants to ride it at 50 amps for one hour, a battery that is rated for 50 amp hours may not work if it can only...
by usatracy
Sep 27 2007 10:15pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

GM used faulty Delco and much better Panasonic lead-acid batteries weighing 1300 lbs. to give the 1997 EV1 a range of up to 110 miles on a charge. GM also used a 700-lb. NiMH battery pack on the 1999 EV1 to give it a range of up to 160 miles. The NiMH battery is recyclable, lasts longer than the lif...
by usatracy
Sep 27 2007 9:19pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

And does 123 own the patent, I thought the nano-phosphate production was under exclusive license to A123 from MIT, the actual patent holder and inventor, and that this was done to prevent a recurrance of selling the completed technology to the highest Saudi petrol bidder who would just remove it fro...
by usatracy
Sep 27 2007 9:09pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

Oh yes, I am very knowledgable and use only the most advanced technology available. Like today, my worst silicone finally got down to 1 3/4 miles at full speed. I went to advanced auto and got 5 U1 360 CCA flooded Lawn and Garden batteries for 25 bucks each, they are installed now and I am charging ...
by usatracy
Sep 27 2007 6:53pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

Oh, I understand all that, I looked at the DeWalt Ebay route 3 months back, too much trouble. I'll wait until they rent the Prius with the HyMotion battery pack in it (A123) at Budget rental cars sometime this Spring and have a convenient car jacking :) Those are going to the the really BIG 123 cell...
by usatracy
Sep 27 2007 4:27pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

So, the way I figure it until we get the data on how many amps you pull max, and what the voltage drop of the cell is for that load, for the purposes of a ballpark cost quote, you need either 21 or 22 cells per string. Thats 2.3 AH The stock battery is listed as 38 ah but thats 20 hours rate At 20 a...
by usatracy
Sep 27 2007 4:01pm
Forum: Battery Technology
Topic: Custom A123's almost here!
Replies: 73
Views: 14037

Number of Dewalt cells per pack for 60 volt XM-2000

OK, I have gone over this a couple of times, you need to get this right if you are going to make a pack for this bike. The controller is tuned to operate with Chinese Silicone batteries. The controller will low voltage cut out at 52.5 volts The stock charger goes to 73 volts The silicone batteries w...