Endless Sphere

LeftieBiker wrote: ↑

Nov 10 2020 7:13am

I strongly suggest that you reconsider using straight-cut gears,
.. and a really top notch lube for them.

The same or worse noise level comes from cycloidal gears.
What is the top notch lube for bevel gears?

https://www.aliexpress.com/item/1005001343441283.html?spm=a2g0o.productlist.0.0.348d5d98FD3Tic&algo_pvid=9b84071e-996f-4be2-89c9-d5c1b8b0343d&algo_expid=9b84071e-996f-4be2-89c9-d5c1b8b0343d-0&btsid=21135c3416036686847302137e5e3d&ws_ab_test=searchweb0_0,searchweb201602_,searchweb20160...

I'm just asked here if built in gps can be used as anti-theft tracking feature. Car navigation systems exist maybe 10-20 years already without mobile network provider support.

I have SP30S005 model.
In the app and pc software there is gps speed check function available.
How sim card module can only be related with gps functionality? Bms is not a smartphone.

It's a Bluetooth BMS not a GPS BMS :pancake: You are wrong. In JBD smart bms there is gps speed function available. Why not to use this gps option for tracking purpose? LOL :lol: Your smartphone has GPS not the BMS. You should first buy this BMS and only than claim about its GPS. Today not only sma...

furcifer wrote: ↑

Oct 23 2020 3:59pm

Andrewol wrote: ↑

Oct 23 2020 2:55am

Does anybody know can this bms be used to track the bike in case of theft?

There is, but as far as I can tell it's only available in China. They offer GPS tracking and remote shutdown in new Smart BMS.

Is SP30S005 this new Smart BMS?

eee291 wrote: ↑

Oct 23 2020 2:22pm

It's a Bluetooth BMS not a GPS BMS

You are wrong. In JBD smart bms there is gps speed function available. Why not to use this gps option for tracking purpose?

Does anybody know can this bms be used to track the bike in case of theft?

Does anybody know can this bms be used to track the bike in case of theft?

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How gearbox looks inside?

breaker should be ok <100A - but cant find any info on trip curves other than this: https://d1819pwkf4ncw.cloudfront.net/files/documents/midnite-solar-breaker-time-delay-values-352837.pdf if its an 'instant trip' then anything >100a may trip instantly. a medium or long one (if you can find it) woul...

If your reply was related to my comment, I think the main drawbacks of such fuses are resistance and one time use. Resistance is wasted battery energy. It can be overrated to avoid such issue somehow, but breaker is better in this regard I think.

thanks for the tip. I'm going to use solar DC breaker like this.
https://www.ebay.com/itm/MIDNITE-SOLAR- ... 2763.l2649

I found only a few types of active equalizers.

Never saw such balancer. It's like active BMS, despite all BMSs available are passive discharge balancing type. Circuit brackers can be small enough. https://electricscooterparts.com/circuitbreakers.html https://www.worldelectricsupply.com/shop/en/p/ge-industrial-solutions-thqp140-1-pole-120-240-vol...

If you are without BMS, do you limit the current in case of short with industrial circuit braker? How this 1A active ballancer looks like?
This is my layout choice for your consideration.

lukashanak wrote: ↑

Nov 05 2019 4:18am

Now using 18s 18ah lipo (almost 2 years old. Not good now) and building 22s8p liion vtc5a pack.

What's your battery layout for 22S in such triangular shape?
Nucular doesn't work well with RC motors like X1 Pro, as I heard. It needs special firmware which is still not available.

Hi electric god.
Do you have X1 motor? Would be very interesting to know how bac2000 works in comparison with Nucular.

Where to find the cost for 21S lion? On githud only 2 files available

Is it necessary to discharge overcharged cells during balancing? Perhaps better to share the current with undercharged ones via parallel connection. But there have to be some kind of relays between cells which can act as fuses. Or share the current with neighboring cells in sequential order untill a...

If heatsink will be coupled to the bottom plate the last may flex from screws torque as it's thin and won't provide good contact area. Also there will be too much of thermal resistance between mosfet's die and external heatsink. Use the heatsink as a bottom instead. The best way would be to calculat...

You can screw the mosfets to a piece of alu or copper, than this piece to enclosure, as it's done in chinese controllers or integrate a heatsink in controller's housing.
Enclosure without heatsinking is not good, it will be hot.

shaman wrote: ↑

Aug 06 2019 6:02am

2kW/5kW respectively for the Little FOCer. These numbers are at a 75V volt supply.

Can the power little one be increased to 3kW\6kW respectively? 75V will be nominal or maximum?

I thinks previous model was for Serious Focer? This one with xt60 Little Focer? You can try to lay down all film caps like elcos to make it more thinner.
Do you know any specs of SF? Power, erpm?