Endless Sphere

ALL sold?

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...

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...

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...

Dauntless wrote:Maybe it's an electric that just FEELS like a 3 cylinder engine. Maybe there's 3 poles. . . .

...or three phases.

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...

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...

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 ...

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...

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 ...

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 ...

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...

@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 ...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Very nice!

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....