Search found 811 matches

by wb9k
Jul 10 2016 5:59pm
Forum: Battery Technology
Topic: Help with my overcharged lifepo4 battery. Whats Next?
Replies: 17
Views: 1545

Re: Help with my overcharged lifepo4 battery. Whats Next?

I'm so sorry to hear about this loss for you--I can see it's a much bigger deal for you where you are than it would be for many of us. As others have pointed out, you might be able to get more use out of this pack, but the risks are much higher now than before this event because the cell interiors h...
by wb9k
Apr 27 2016 12:12pm
Forum: Large EV General Discussion
Topic: Miles ZX40ST refurb project
Replies: 72
Views: 13529

Re: Miles ZX40ST refurb project

Thanks for the suggestions! The inverter, BTW, is a Semikron SKAI4001 with control electronics by Oztek. The Semikron uses IGBT's and is rated for 400 Volts, 400 Amps (or thereabouts). After looking MPaul's Leaf motor thread, I see that the actual motor proper is smaller than I thought, but still qu...
by wb9k
Apr 26 2016 8:33pm
Forum: Large EV General Discussion
Topic: Miles ZX40ST refurb project
Replies: 72
Views: 13529

Re: Miles ZX40ST refurb project

Thanks for the words of encouragement guys, I really appreciate it. I had kind of a rough winter with family issues and have been battling a bit of depression. Feeling better lately with the weather improving and motorcycle season back underway :) I'm at a bit of a turning point with this truck. I r...
by wb9k
Apr 08 2016 8:13pm
Forum: Large EV General Discussion
Topic: Worlds Worst production electric car 2016
Replies: 8
Views: 1382

Re: Worlds Worst production electric car 2016

Dauntless wrote:Maybe it's an electric that just FEELS like a 3 cylinder engine. Maybe there's 3 poles. . . .
...or three phases.
by wb9k
Apr 03 2016 2:19pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Zero S with Large Bike Sound
Replies: 18
Views: 3644

Re: Zero S with Large Bike Sound

Thinking more on this, I can see why you wouldn't just want to tone down your regular horn. You want that emergency horn to be as loud as possible for those times when you're about to be killed. I like amberwolf's idea of a bike bell or some other manual alarm that's on the quieter side for the tigh...
by wb9k
Apr 03 2016 9:45am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Zero S with Large Bike Sound
Replies: 18
Views: 3644

Re: Zero S with Large Bike Sound

When I worked at Harman, they were developing a system that did this for hybrids and EV's. No offense, but I thought is was the dumbest project the company had ever undertaken. I saw it as an assault on the EV--how better to take the shine off than to cancel out one of the technology's cardinal virt...
by wb9k
Apr 03 2016 9:20am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: deleted
Replies: 3
Views: 1825

Re: FAST 40kW eGSX with hub motor

If you have not modded the frame, brakes, etc., what is the problem with getting it legally registered ?? I can't comment on the situation in QB, but when I described my motorcycle project to a German colleague, he stated it would cost me about $2,000 in fees to get that vehicle legalized for road ...
by wb9k
Mar 27 2016 5:50pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Derbi senda 50cc electric conversion
Replies: 32
Views: 15471

Re: Derbi senda 50cc electric conversion

Beautiful build quality...puts all my stuff to shame, but that's not necessarily hard to do. Agree that SLA pretty much sucks for motive applications, especially something that looks like it could really fly nicely with a good Li ion pack. I use LFP (A123) in my stuff, but even cheap LFP should be a...
by wb9k
Mar 26 2016 6:11pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 1984 Honda VF500F Interceptor conversion.
Replies: 12
Views: 5639

Re: 1984 Honda VF500F Interceptor conversion.

Been a while since I've made any updates to this thread, but several issues have popped up over the last many months that are now resolved. Firstly, I had begun to make too much of a habit of draining my battery pack completely. I don't recommend constantly trying to break your own distance records ...
by wb9k
Mar 21 2016 10:29am
Forum: Large EV General Discussion
Topic: 45% efficient F1 ICE engine ?
Replies: 46
Views: 4480

Re: 45% efficient F1 ICE engine ?

The first time I saw this tech rolled out was a just a few years ago at the battery show which was sharing floorspace with the engine show. They were pitching this stuff at big rig trucks and were claiming a 6% increase in fuel economy. I too am suspicious of claimed double-digit improvement though ...
by wb9k
Mar 12 2016 5:21pm
Forum: Large EV General Discussion
Topic: Miles ZX40ST refurb project
Replies: 72
Views: 13529

Re: Miles ZX40ST refurb project

Ok, it's been months now, time to get my head back in this. I have a couple of forklift guys I need to go visit to weigh my options. Considering using a 9 inch motor if the right opportunity presents itself. Unfortunately, I don't have much money on tap at the moment, so that doesn't help. We (Dad a...
by wb9k
Jan 20 2016 11:32pm
Forum: Battery Technology
Topic: Genuine A123 AMP20 Module!
Replies: 17
Views: 2473

Re: Genuine A123 AMP20 Module!

@wb9k are the Spark packs the M1B formula? That is EXT, correct? The Spark packs use the Gen 1.5 Amp 20 cell. M1B, yes, EXT, no. They're not the same thing. There have been a lot of small flavor changes over the past two years...honestly I'm not totally up to speed on what got introduced when. The ...
by wb9k
Jan 13 2016 7:07pm
Forum: Battery Technology
Topic: Damaged A123 Battery Cans
Replies: 19
Views: 1944

Re: Damaged A123 Battery Cans

Ugh...salty corrosion. You'll want to clean that off as best you can. I would treat these cells (as well as your other dinged up ones) as spares if you can. Any cans that have corrosion that extends into the trough of the safety vent should be discarded. If there's no corrosion in that trough (and y...
by wb9k
Jan 13 2016 11:55am
Forum: Battery Technology
Topic: Damaged A123 Battery Cans
Replies: 19
Views: 1944

Re: Damaged A123 Battery Cans

Hi all. The pack these come from is air-cooled and does see very high C-rates at times, in both directions. It is possible to keep the weld straps and cut the whole into patterns that will work for you. This wouldn't work for the style holder you are going to, but you can often use heatshrink to mak...
by wb9k
Jan 01 2016 10:11am
Forum: Battery Technology
Topic: Is this guy the expert he claims ?
Replies: 29
Views: 3472

Re: Is this guy the expert he claims ?

I remember when playing around with LiPo that charging it cold didn't charge at the same C rate on the Icharger ? I never used temp sensors to charge LiPo. This would likely fall into one of those "extreme cases" I mentioned where the DCR rise actually eats into the ability of the charger to delive...
by wb9k
Dec 31 2015 9:36pm
Forum: Battery Technology
Topic: Is this guy the expert he claims ?
Replies: 29
Views: 3472

Re: Is this guy the expert he claims ?

Most of the basic claims being made in this thread are true. Neither thermally-induced DCR change or BMS smarts alone explains all the observations made here, and they are valid observations. One does not cancel out the other or negate the fact that it exists. Yes, performance suffers with cold temp...
by wb9k
Dec 29 2015 2:41pm
Forum: Battery Technology
Topic: Genuine A123 AMP20 Module!
Replies: 17
Views: 2473

Re: Genuine A123 AMP20 Module!

Find a wrecked Chevy Spark? That's what that's from. 28S3P. Actually, every cell IS fused (under the welded-on busbars, punched into the anode tab) and the module is fused too--look at the neckdown on the strap leading to the + terminal. Short the module out hard, that's what you'll blow. I don't re...
by wb9k
Dec 28 2015 2:43pm
Forum: Battery Technology
Topic: ~120 year old Laclede battery running my desk clock
Replies: 8
Views: 882

Re: ~120 year old Laclede battery running my desk clock

Fun! The Electrical Engineer trade journal from November 29, 1893 (pub. weekly in NYC) had a better illustration of the case and guts perhaps... (Found in Google Books here:) https://books.google.ca/books?id=nC1KAQAAMAAJ&pg=PA480&lpg=PA480&dq=Laclede+battery&source=bl&ots=_jAc53QNZY&sig=y9pzPMjZjSL...
by wb9k
Dec 28 2015 2:32pm
Forum: Battery Technology
Topic: ~120 year old Laclede battery running my desk clock
Replies: 8
Views: 882

Re: ~120 year old Laclede battery running my desk clock

Awesome! If anyone wants to experiment with older battery types, the Edison "Nickel-Iron, NiFe" battery is safe and easy to fiddle with. The 1895 Ogden Bolton patent bike ran on 10V. Direct drive rear hubmotor, freewheel built into the motor, with the battery in the frame triangle....I might have t...
by wb9k
Dec 28 2015 2:21pm
Forum: Battery Technology
Topic: ~120 year old Laclede battery running my desk clock
Replies: 8
Views: 882

Re: ~120 year old Laclede battery running my desk clock

Interesting :) Can the cell be reused/restored once discharged? Yes, the last line on the paper label says to refresh the cell you simply pour out the water mixture and make a new one. In this way, I guess you could call this a "slurry battery". I believe the zinc rod is eventually consumed as well...
by wb9k
Dec 27 2015 8:08pm
Forum: Battery Technology
Topic: ~120 year old Laclede battery running my desk clock
Replies: 8
Views: 882

~120 year old Laclede battery running my desk clock

I picked up this cool old battery at an antique mall a year or so ago: http://i935.photobucket.com/albums/ad193/mollysplayhouse/Laclede%20cell/20151226_122534.jpg This link dates the item to the 1890's: http://reference.insulators.info/publications/view/?id=12185 The lid of the glass jar is a carbon...
by wb9k
Oct 27 2015 1:38pm
Forum: Large EV General Discussion
Topic: My electric Triumph GT6
Replies: 49
Views: 8741

Re: My electric Triumph GT6

I don't think it was meant as criticism, just pointing out that you have the potential for an easy upgrade at some point in the future :) Great project by the way, doing something well is hard, but doing it well and on a tight budget is doubly so. Absolutely, not meant as a knock on anyone. This is...
by wb9k
Oct 26 2015 9:01am
Forum: Large EV General Discussion
Topic: My electric Triumph GT6
Replies: 49
Views: 8741

Re: My electric Triumph GT6

kiwiev wrote:
wb9k wrote:Nice setup--deserves better cells!

What cells do you think would be better for similar $$$$?

Cheers Kiwi
I didn't say they would cost the same.... :wink: