Endless Sphere

tmho wrote: ↑

Sep 24 2020 1:30am

Here is the video showing the balancing done by my bms:
https://www.youtube.com/watch?v=eUayl-8JyoI

Do you think you could do that vid again and turn your phone and the cam so that we can see the actual cell diff voltages and the whole screed?

Vertical video syndrome at its finest.

Bein a buyer starting out like that.. well. may turn some away.... saying you want to find someone else for a controller. However, being a seller... I dont care one way or another, you saying you want to find someone else for a controller. So the Sabvo 72150 will cost you 450$ plus shipping. New. No...

Someone once discussed this with me. This is what he had come up with. I saved the screenshots, of the equations. This is what you want to know, right? Put numbers where you know they go, and you have the answer, I think. You are competent enough electrical hobbyist to see this. Sorry the last pic w...

You should check out Jus... got 2 options: 1. If you can tolerate the occasional drip of oil , put some ATF in the motor and pick up the added benefit of better cooling. 2. Put a drain hole at t.... IDK whay everyone says you will leak if you use ATF. I have, and nada drop. Maybe it is the axle is ...

I used loctite 504 anaerobic gasket maker. Best stuff out there dont let a drop of liquid of vapor through. Holds pressure great. Wonderful stuff if you are in need of reliability,. The best in the world use it. I put that sh** on errytang. https://www.henkel-adhesives.com/us/en/product/gasketing-se...

Calculate it. Very well known and defined eq. to use.

Just followed your recommendation today and bought me 1 liter of 35% hydrogen peroxide :D What did you mean by heat? Heating the liquid or heating the metal and dropping it into the liquid? how hot is hot? Hydrogen peroxide has a specific heat of decomposition. It breaks down into water and oxygen....

I think you should buy an XRF gun. Just googled that...$5000-$20,000 for that... I will stick to my dremel and salt and asking here for advice :lol: ( strong, real,) Hydrogen Peroxide+ Heat... ( not that drugstore brown bottle, but 12% or greater ) makes ferros metal rust. Fast. VErY fast. In secon...

If you're just testing one cell at a time, at. 5c that's up to 50amps @3.2v. Most dischargers won't go to ... ...a roll of nichrome wire and make your rap it around something heat proof and/or non conductive ceramic, wood or the likes. Say 6 strands at the right length ~1mt. atteries (sans the wate...

I think you should buy an XRF gun.

I am selling a 30Ah 2,500Wh 72v pack for 450$. Plus shipping.

500+A capable, 6 Gauge wire, 20Ga BMS sense leads, built into DMC crimppedd gold with a break out board. Lasts years.

Lol.

Are you still making packs from these? I'm looking for 72v 20ah? Depending on size I can stuff in my vespa. https://endless-sphere.com/forums/viewtopic.php?f=10&t=104268 Yes absolutely. I am wrapping up a 30Ah pack right now for a scooter. I have a couple planned, that I am working aon, a 52v and a...

100% agree. Minimising stress in the axle is the goal . Minimise stress by maximising the area over which the force is applied => tight fit and maximum surface contact. You spelled minimize and maximize wrong, friend, but I know you are not native to England so I will give you a break. I hear your ...

For torque arms, it doesn’t give any advantage to ha You don’t need hard steel to make custom dro ok Karens. yall do you, I'll do me. Lol. To each their own, but I just told you a very easy, cheap way to toughen the metal. Might not NEED it.. .. but I also dont "NEED " more than 750w and 20mph acco...

Pretty easy to make custom torque arms, if you have a few basic tools. Drill, file, angle grinder, and a pair of vise grips. One thing alot of peeps forget... to mention... is the hardness. IDKY but Im a metalhed, and I always gotta mention. Just carbonize it ( the steel.. ).. with a acetylene torc...

Rix wrote: ↑

Aug 07 2020 3:29pm

Disregard my last. here is a pic of Luke's bike with a 273 laced to an 18" rim, its 2X lace pattern, he did have the holes drilled at steep angles to make it work.

Looks like 1x to me? Am I missing something?

If I had a little more power it would probably be perfect. So whats it got? Srry i have to know. Nice, nice bike. Clean, neat, comfy looking, but still with that racer stance. nice. Plus pedals, so very cool. I had a goal to build a 40 hp bike using only 400A @ 72v doesn't seem unachievable. You ar...

What would I do? I'd weld it shut with lead, and monitor it for the next year to know the answer definitively. In a drawr in a fireproof safe in a bank vault under Fort Knox. Datalogged from baseline every week for a year. I would not use it in a pack that you will rely upon or be complacent with in...

It would take me 30 seconds per side to weld that shut in steel. I promise you wont break it again, . Ever,., .I would use a stick, and it wouldn't be pretty and shiny, with zero splatter, but would look and be very strong. I could mig it, I could tig it, if you wanted zero splatter and perfect half...

I am building a load array that you can run with a Cycle Analyst and datalog the results. It is getting kind of expensive, but is a universal battery/motor/controller testing machine. 24v-240v. Max I can pull is about 20Kw. Min is about 75w.

Not much out there.

Current Voltage IRpack Capacity

You can't use that switch for speed control. The blower is also only single speed. You would need a speed controller for a single phase motor. Oh damn... Well, found exactly what I needed! https://www.aliexpress.com/item/4001175799855.html?spm=a2g0o.productlist.0.0.7af17addcn8ucJ&algo_pvid=eb46887c...

It was general statement that universal/modeller charger is usually not designed as battery tester/cycler. My issues with PLx software was that there were no possibility to set any cycle count, there was only options 1,5,10,20 and infinite. Other issue was with the stability of very long logs, I lo...

Most problems are related with the software. What problems? Might I ask, friend? ? What software did you use? There are other soft wares for viewing the data ( than the OEM)... Which is useful for comparison of DCIR fade when you compare first and last cycle curve. Easily done with the Pl series. D...

My Pl6 by Revolectrix is very good when it comes to it. You know. I can set it up and do a 100mAh cell ( x6, actually) through hundreds cycles or a 100Ah cell through hundreds of cycles. All on datalog and spreadsheet for export. Old, but good. Well known and accepted in the hobby community, and sim...