Endless Sphere

I bought two of these cells to evaluate and am measuring Ir from 2.2 -> 3.0 mOhm with my PowerLab6. The cells I bought are in the holder. I did a 40A discharge and the cell only got a little bit warm. Has anyone built a pack using the holders yet? I don't know if the tabs are close enough together ...

oops i mean .0008 ohms or 0.8 mohms. They are not that " .0008 ohms or 0.8 mohms." I have tested many many. From a few different batches. They are 4mOh in good, condition, and ( higher) 8 mOh or more, in used,. Could you show us this reference to the figure you state? I can show you 22 ce...

Cool thankyou saved.

A few weeks ago, I bout a 100+ SPIM08HP from them. Never buying from them again. https://drive.google.com/drive/folders/1E7bgGbxKzkBvIHm7e5A7g1guDpsVqqsP?usp=sharing I'm going to buy the 70 pack of SPIM08HP when it comes back in stock. For $2/cell as long as most of the cells are still around 0.8mo...

Yes, lubricity is a big concern. Lol Half fill it with alcohol free gasoline and suck the O2 out. Replace it with Hydrogen under pressure of about 200KPA. Mmmmm Phase change. Lubricity. Lubricity is for valves. Grease is for bearings, and I hear bearing come with labrynth seals. Containing the grea...

I like Cannons. Machined Cannons. I cannot afford a Fluke. My optocouplers are just gonna have to live with Harbor Freight. Resistors, get in line. Likely because I spent 780$.. wait.. no.. well, yeah around there.. maybe over a 1.2 grand by the time i'm done... daisey chaining the Uarts on my quad-...

I could certainly build them if you make them worth my time. How much do you want to pay for ea.? Expect 400$ / Kwh. Plus shipping and insurance.. I have all options available. UPS, or freight. I can get you a competitive rate quote on both. If you want new. Used I could probally do half that or a l...

There is an easy way to check your Serial port and configuration using "Hyperterminal" and performing a "loopback". At least then you knjow the port and that the port is working correctly.

Show us a pic of the board. That might tell us what does what.

Problem is dont parallel charge lipos in bulk. Lol. Parallel charging is dangerous, well known, in the hobby world. We started with pigtails.. and they were quickly found to be dangerous.. then moved to supposedly " safe parallel" boards.. and they are even not the best, even though they a...

People are likely misinterpreting the subject line. The ebike build is fully suspended. Just check back when the suspension is lifted :thumb: Thankyou for the clarification. Understood. So After careful analysis that took me 4.2 seconds -> ... and thank you also, for the honor, friend. Yes m in it ...

What the....?!?!?!??! I just wanted to see a bike, man. ........ not the ramblings of a ... madman, or someone on drugs... WTF is this thread full of? Lol. Not bikes, thats for sure. Maybe, nobody will ever know. Yeah pretty sure thats it. Tl:Dr; You're on drugs, right? Lol

it would seem my short was somewhere on the connections in my wiring harness that involved the cycle analyst throttle, ebrake, pas, on off switch so i am rewiring all those Thanks Be careful hooking that PAS back up again.. if you are on 72v or the like. I just took out two CA3 ( one brand new) wit...

I guess it would be easier to just run 10A through my conductor with a thermistor stuck to it... Yeah, that's probably what I would do. Lol. Sounds like the best plan. Heres another person, whom comes to mind, knows a tom more than I, and deserves the credit, when thinking along critical lines of t...

Just R * I^2, so at 10A 0.8W for copper or 3.2W for nickel. Umm...how do I convert that to temp rise in the conductor? Empirical or Virtual? Virtually you can use BTU/Min calculations. Empirical; https://www.digikey.com/en/videos/t/tensility/what-is-a-temperature-rise-test Thermal equations get ver...

Here are mine. I am selling them too. If anyone is interested. 1-100, just pm me. As many as you may need. On another note, what do you guys think these are worth? 1$ ea.? 2$ea? 1.50$ ea.? Regardless,, Made in the USA. They stack, tessellate, in module, and or can be used in a parallel application, ...

Lemme guess.. Fill hole?

Yah packing efficiency is what it is.

These are laser cut aluminium, but I will be getting them nickel plated. The process is electroless, and uses a zinc stage in between. I'll be paying someone else to do it... Yes. That was mentioned. Yes many ways to plate. I was wondering the grade, honestly. ok. Still wondering about that blank h...

Jonescg, have you seen the threads using the copper/nickel sandwich method for series? I dont know if it would be appropriate for this build, but I thought it was worth mentioning. I have always wondered about the long term integrity of such, bare copper used anywhere in an assembly. I feel like th...

I do that, have for about 3000 miles.... I get 8,000w from 100A @ 72v from a 1000w motor... In the winter the hubsinks keep the temp down but in the summer I need thermal rollback. Not much to gain once its hitting its thermal limit all the time. I can easy hold 35-40mph contin though. 50A with a 10...

Raise your discharge current to something greater than 35 A....

You bike probably hits 45 A or more for an instant on a starting throttle application. The shunts in those BMS are not the most accurate, and the threshold of hysteresiscan make it trip when unwanted. So start with that.

ZeroEm wrote: ↑

Nov 30 2020 6:49pm

The liquid can "give" like in a torque converter

No!

Yeah .. "Under pressure " is not the same as "compressed"

I use a "Hawkeye 808" to monitor the input current and stop the charge at undercurrent ( of the line) or overcurrent ( of the line). Trips a relay disconnection at a certain mA adjustable. Does it work for DC ? The datasheet doesn't say. Seems to imply AC (since it is line powered by indu...

I got a set of 18" x 1 .6... I can do 80$ ea shipped. Look for Akront. Akronts are the bomb ( and Spanish, so you may find some... ) If I had the money I'd get a 2.5 by 18 36 hole and a 1.6x19 36 hole in chrome Akront aluminium. https://www.ebay.com/sch/m.html?_odkw=&_ssn=valtermotousa&...

Highly regulated as HazMat goods, need to take courses to become a certified shipper. Apparent Damn... What about the demand for custom built packs? I See I'm in the niche market, We can ship anything internationally with our hazmat capable UPS shipper. It cost about $150 to ship from Florida to Qu...