Endless Sphere

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Let us know how Nucular controller works with x1

no, 75600erpm 10800rpm at 72v.
Alan Hu spinned it to 14K rpm

I have

150kV 7 pole pairs. Are you looking for a suitable controller?

Do you participate in Cyc owners group in FB?

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Bac 800 - 6KW. Is this a typo?

What Astro says about suitable controller?

5Ah for one cell or for battery? If one cell, 1.8kg weight with 14 cells result in 25kg or over 50lbs.
With 90 days warranty I would only take it for free).

You have a special frame made to fit battery pack nicely. As I see you welded the cells in the battery with wires? Or you just soldered wires to the cells? I bought sheets of soft rubber like silicone to wrap around a battery. To save space I'm thinking to buy or make some triangle bag instead of ma...

With glued cells it can be difficult to replace some if required. I used honeycomb brackets. Did you spot weld the cells? Could you please show how did you place it in your ebike? Have you used some kind of buffering, as it should be more than 13kg of weight and bottom cells can be jammed on a rough...

Very nice build.

Offroader, where have you placed so many batteries in your ebike? Could you show how you did this?
I would like to put 273 cells in a triangle of my hardtail, but space is very tight, 1 cm left for case with some buffering.

Any plans for BMS GB?

I'm not going to blast it in the can. It's for storage only, no all energy release in 1 second is expected

Will aluminum can with 2mm thick sidewalls be fine for fireproof battery storage?
What bms 21S best options for diy we have? Preferably based on TI BQ76940, BQ76PL455A ICs

I don't understand what rubber band is all about?
You got a cell internal short circuit due to a fall and high impact. Conclusion: never fall your batteries to save your house.

Does anybody know how to implement battery temperature monitoring in this set, like it's done with motor temperature?

Perhaps better would be to redesign the rotor for Cyc with magnets shells like in bbshd. I'm for the chain drive as well now.
Will wait for your test results Crossbreak.
Thanks.

With 2K rpm on a motor spindle chain isn't an optimal solution here for best performance efficiency value, however most available. If the magnets will fly at that speed, than it's a warranty issue. Is there a space for carbon wrapping?

You are right partially. That's why I wrote before about wind resistance. But with one reduction ratio half of throttle position (fixed phase amps) with given wind resistance and road condition you will have 30kmh. With another reduction ratio and the same other conditions you may have 35kmh. The di...

So, the main reason it won't fit. I don't wish to discuss, but throttle has not much to do with efficiency of the system, this is just a speed lever for your ride. I think everyone agree. We need highest torque point with lowest phase amps ratio. As it will be fixed gear, efficiency must be taken in...

Anyone who has Phase runner (upgraded Bac 800) which is only 50A max., will be able to compare it with stock 72V controller when CYC ships it out.