Search found 24 matches

by mace1934
Feb 27 2012 7:52pm
Forum: Battery Technology
Topic: A123 26650 M1B Cell 2.5 AH - new?!
Replies: 5
Views: 1226

Re: A123 26650 M1B Cell 2.5 AH - new?!

Sounds great. I hope they will be available with tabs - I don't do welding.

Mace
by mace1934
Oct 19 2010 11:41am
Forum: Electric Aircraft
Topic: Elephant in the room - Quadcopters...
Replies: 197
Views: 40459

Re: Elephant in the room - Quadcopters...

"if you could fly an autonomous vehicle to the store to pickup a loaf of bread for you, instead of a car, it might be in the spirit of ES"

Amen.
by mace1934
Aug 20 2010 5:58pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Big Dummy, Xlite 5304 front, 16S 20Ah Thundersky
Replies: 6
Views: 1664

Big Dummy, Xlite 5304 front, 16S 20Ah Thundersky

Big Dummy with Xlite 5304 front, 36-72 V 48 amp controller, 16S1P 20Ah Thundersky (eLite) Li-ion battery Limited by age and asthma, but wanting to continue biking (including shopping), I've been experimenting with electrics for the past few years. This is a report on my Big Dummy. It can be a bit aw...
by mace1934
Mar 10 2010 2:51pm
Forum: Battery Technology
Topic: Longterm lithium prices in $/Wh
Replies: 44
Views: 3112

Re: Longterm lithium prices in $/Wh

In coming years the limited amount of easily mined lithium may become a deterrent to EV development, if lithium batteries remain crucial. Though there is a vast reservoir in seawater, they say extracting lithium from the seas is prohibitively expensive. A better alternative may be geothermal sources...
by mace1934
Feb 23 2010 1:29pm
Forum: Battery Technology
Topic: This Week in Batteries blog by Venkat Srinivasan
Replies: 0
Views: 268

This Week in Batteries blog by Venkat Srinivasan

From earth2tech, http://earth2tech.com/ : "Pull The Plug!: A new blog called This Week In Batteries, run by Venkat Srinivasan, a researcher at Lawrence Berkeley National Lab’s Batteries for Advanced Transportation Technologies (BATT) recently launched and is providing fascinating reading. ââ...
by mace1934
Apr 08 2009 7:47pm
Forum: Battery Technology
Topic: Lead Acid + UltraCap = Perfection?
Replies: 37
Views: 3436

Re: Lead Acid + UltraCap = Perfection?

Read these, wept.

In search of Lithium: The battle for the 3rd element:
http://www.dailymail.co.uk/home/moslive ... ement.html

The Trouble with Lithium 2:
http://www.meridian-int-res.com/Project ... oscope.pdf

Larry
by mace1934
Jan 12 2009 2:48pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Ultracap Bike
Replies: 105
Views: 38526

Re: Ultracap Bike

JCG wrote, about the torque arm struggle: "if this thing manages to fail again, I quit! " PLEASE don't quit! We have so much to learn from you and your project. It's so sad, with all you've accomplished on electric matters, that this mechanical thing is giving you so much frustration. Maybe you need...
by mace1934
Nov 20 2008 7:14pm
Forum: E-Bike Technical
Topic: Cycle Analyst V2.0 User Manual, finally complete
Replies: 4
Views: 712

Re: Cycle Analyst V2.0 User Manual, finally complete

John in CR wrote:Perfect timing. I was just about to install mine.

Thx

John
Ditto!

Logging someday?

Larry
by mace1934
Oct 02 2008 1:55pm
Forum: E-Bike Technical
Topic: Cross-Canada by Ebike
Replies: 606
Views: 133094

Re: Cross-Canada by Ebike

Justin,

I was away from an internet connection, so missed the wonderful day when you arrived in Halifax. But

"Cheers from Halifax, -Justin" ,

even though read a couple of days after the event, brought tears to my eyes.

Congratulations, Justin!
by mace1934
Oct 02 2008 1:55pm
Forum: E-pic Topics
Topic: Cross-Canada by Ebike
Replies: 615
Views: 110794

Re: Cross-Canada by Ebike

Justin,

I was away from an internet connection, so missed the wonderful day when you arrived in Halifax. But

"Cheers from Halifax, -Justin" ,

even though read a couple of days after the event, brought tears to my eyes.

Congratulations, Justin!
by mace1934
Aug 28 2008 6:07pm
Forum: E-pic Topics
Topic: Cross-Canada by Ebike
Replies: 615
Views: 110794

Re: Cross-Canada by Ebike

Marvellous, Justin! I covered, or paralleled, a small part of the beginning of your trip in 1982: Anacortes, San Juans, Vancouver Island, Vancouver, Harrison Hot Springs, Anacortes. Wish I'd had electric then! I plan to get a 5304 for my next bike. Apparently, you've had no problems with it riding i...
by mace1934
Aug 28 2008 6:07pm
Forum: E-Bike Technical
Topic: Cross-Canada by Ebike
Replies: 606
Views: 133094

Re: Cross-Canada by Ebike

Marvellous, Justin! I covered, or paralleled, a small part of the beginning of your trip in 1982: Anacortes, San Juans, Vancouver Island, Vancouver, Harrison Hot Springs, Anacortes. Wish I'd had electric then! I plan to get a 5304 for my next bike. Apparently, you've had no problems with it riding i...
by mace1934
Jul 13 2008 4:56pm
Forum: Battery Technology
Topic: The care and feeding of a123-based packs...
Replies: 548
Views: 119332

Re: The care and feeding of a123-based packs...

My simple rules of thumb, based on my experience and the suggestions of others (I recognize that different folks will have different ways of solving problems, or differing priorities): Before starting out on a trip, be sure the pack is fully charged, and have a good idea how much of the pack's capac...
by mace1934
Apr 17 2008 11:55am
Forum: E-Bike Technical
Topic: Clyte 408 or 5304
Replies: 22
Views: 2155

Re: Clyte 408 or 5304

Thanks for that Rassy! Maybe it's not such a good idea to put a 5305 on the front wheel of an EZ-3 USX.

Larry
by mace1934
Apr 17 2008 11:27am
Forum: E-Bike Technical
Topic: Clyte 408 or 5304
Replies: 22
Views: 2155

Re: Clyte 408 or 5304

I'm thinking of using a 5305 in the front wheel (20") of a Sun EZ-3 USX recumbent trike. I have a 408/40A_36-72V/66 volt system on my old Rockhopper mtb, which works beautifully - except on hot days riding the final steep hill to home, when the motor can get pretty hot - 160 degrees F once. The trik...
by mace1934
Dec 19 2007 6:40pm
Forum: Battery Technology
Topic: LifeBatt cells now available for ebike use
Replies: 118
Views: 20547

At what voltage should charging of these cells be stopped?

Most promising developments. Will certainly keep an eye on this thread!

Larry
by mace1934
Dec 11 2007 1:33pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

During rides, the packs are series-connected in pairs, the pairs connected in parallel. L.
by mace1934
Dec 11 2007 1:27pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

I can't locate any bad connections, but the recognition of this problem has spurred me to take the time to do it right, and get the cells out from under the limitations of the DeWalt BMSs, whether they are at fault or not.

Larry
by mace1934
Dec 10 2007 8:45pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

Thanks. Looks like a real winner in the making! I've been noticing a problem lately: different (intact) DeWalt packs discharging at significantly different rates - up to 2 fold. I use 2S3P PACKS, with 2 eloggers on 2 of them and a Whattmeter (WM) on a third (it would be nice to have 6 eloggers). Her...
by mace1934
Dec 09 2007 6:01pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

Gary,

Are there any new micro logger developments?

Larry
by mace1934
Nov 18 2007 2:55pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

Gary, here's one source (among several - even HomeDepot I hear): http://www.gaiam.com/retail/3/SL_SolarElectric_PV My panels are made up of 36 cells; each cell nominally develops (open circuit - OC) 0.5 V in full sun. Two of my panels in series, normal to the sun, will develop about 38 V +/- about 2...
by mace1934
Nov 17 2007 8:55pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

Gary, Sorry for the delay; I've been away. I've had that solar array for about 18 years. For many years it powered a well pump, but had been sitting unused for a while until I started using it for my bike. Six 60 watt panels; for the bike app. I have horizontal pairs wired in series. Each pair can c...
by mace1934
Nov 12 2007 4:14pm
Forum: E-Bike Technical
Topic: Using EagleTree's MicroPower eLogger as a bike computer...
Replies: 37
Views: 5916

Gary, Many thanks for this post. I've been running a front 408 with 72 V controller and 20S3P A123s on my old Rockhopper. It's a great setup, but the motor tends to get hot on the final climb to my home, so I have to go slow and pedal some. I've been thinking of going with a 5305 (I'm not into speed...