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trevmar

Alexei/Alexander have written new 'NINEbattery' app - a 'MUST-HAVE'

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Great work, :clap3::clap3::clap3:

Working fine with Mini PLUS N4M340 and Mini N3M240 ! Android LineageOS 8.10, Bluetooth ok , connect easily.

Thank you Alexei

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Really thanks Alexei :clap3:

Now, hope next forthcoming app will be the NineFlash, the 1st and only Greatest app to Flash Custom or Official Firmwares back and forth in our Minis B) :dribble: :thumbup:

Edited by zugu
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Ugh. Time to pick up a cheap android phone!

 

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I need it for iOS, but maybe I'll pick up a cheap android as well for stuff like this.

 

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18 hours ago, Alex_from_NZ said:

What is status 16?

Status 16: Explosion imminent… Run, run for your life!   :D

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4 minutes ago, The Fat Unicyclist said:

Status 16: Explosion imminent… Run, run for your life!   :D

artist-impression-volcano.jpg

So you got me worried and i threw it over board on the ferry on the way home...

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@MRN76

Can you advise, status 16 in the NineBatt app (as below). 

This is because cell 2 is out of balance, yes? At full charge there is a 0.07v difference, at half charge 0.04v. 

Interestingly the ninebot app shows battery status is normal.. How far out of balance is safe? 

This was after full charge and balancing on charger. SmartSelect_20181012-162902.thumb.jpg.e21a8a980e5c885bd9f0510fe983dd0a.jpgSmartSelect_20181015-194617_Segway-Ninebot.thumb.jpg.3fff3145e8662a66dc716c3f47500f6b.jpgSmartSelect_20181015-205747_Segway-Ninebot.thumb.jpg.3bacd168f1d0e4dfe64c8d48557c073f.jpgSmartSelect_20181011-211942.thumb.jpg.2e9d403aa8e0b4122db9f25502f18d28.jpg

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7 hours ago, Alex_from_NZ said:

@MRN76

 How far out of balance is safe?

The MiniPRO battery packs are configured as 15x2 cells, for a total of 30 cells. The cells used are either MG in the original MiniPRO battery pack or MF in the reduced power lower cost variant. Both are rated at a maximum continuous current delivery of 10 amps max. Two identical cells of each are selected at the factory, welded in parallel, then they are stitched into a series bank of 15 twin-cell 'cells'. If one of the individual cells goes fully faulty then the other cell will have to deliver all the peak motor current, which according to the Engineering blog, is normally 10-15 amps. This will give problems, so a single cell failure will degrade the current output of the whole battery pack.

The problem is that the cell voltage is not an exact measure of the state of the battery. One cell of a pair could be totally dead, yet the remaining cell could put out a correct voltage. It would be the current which would be halved. This is why there is such a complex BMS on these battery packs, to try and reduce cell failure. I built my pulse-current tester so I could throw a 20-25 amp load across the battery pack and make sure it could supply the full current.   Details are in this thread: https://forum.electricunicycle.org/topic/10991-minipro-batteries-4300mah-or-5700mah-boondoggle/?do=findComment&comment=189387       

Having played with lots of these 18650-size batteries over the years, I would not become worried until the discharged voltages varied by more than 0.1V and even when this happens I would suggest trying to assess whether the battery is able to supply full motor power, as it may well still be able to do. I am sure the BMS and the main firmware measure maximum motor current, but AFAIK there is no way to get a readout from them of how much current they are seeing from the cell-bank.

However, being able to watch a single two-cell 'cell' of the battery gradually change with time is far better than having no idea whatsoever of what is happening inside that battery :)

MG1.gif.97e28323f69859d3230641204170d35eMF1.gif.009c48834122f6fb13d24de419d83781

Edited by trevmar
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Tried NINEBattery app with my Ninebot PTR Elite+  but says "BLE not connected".  Tried turning bluetooth on/off, but with no success.  Website says that it should work with any Ninebot.

Any ideas out there.

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9 hours ago, NinebotPTRELITE+ said:

 "BLE not connected". Any ideas out there.

I had a bit of trouble getting connected initially. I connected using the Segway app, then opened the battery app, and all was OK. Closed the Segway app and battery app still stayed connected. Bluetooth is like that, sometimes...:)

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23 hours ago, NinebotPTRELITE+ said:

Tried NINEBattery app with my Ninebot PTR Elite+  but says "BLE not connected".  Tried turning bluetooth on/off, but with no success.  Website says that it should work with any Ninebot.

Any ideas out there.

bluetooth 4.1, try with android device

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On 10/16/2018 at 9:28 PM, NinebotPTRELITE+ said:

Tried NINEBattery app with my Ninebot PTR Elite+  but says "BLE not connected".  Tried turning bluetooth on/off, but with no success.  Website says that it should work with any Ninebot.

Any ideas out there.

Hi....

As said, is a problem of BT version....

While I'm able to connect to the MiniPro with Android 4.3 OS, Elite+ require at last Android 4.4 and up in order to use BT 4.1......

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20 hours ago, trevmar said:

I had a bit of trouble getting connected initially. I connected using the Segway app, then opened the battery app, and all was OK. Closed the Segway app and battery app still stayed connected. Bluetooth is like that, sometimes...:)

20 hours ago, trevmar said:

I had a bit of trouble getting connected initially. I connected using the Segway app, then opened the battery app, and all was OK. Closed the Segway app and battery app still stayed connected. Bluetooth is like that, sometimes...:)

Had  an old android phone with 4.4.2 and Ninebot V4.2.0.   Tried connecting to both apps to get Battery app to connect to Bluetooth, but still no success.  Do want to thank you for your post and suggestions.  Was certainly worth a try.

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7 hours ago, jojo33 said:

bluetooth 4.1, try with android device

Had  an old android phone with 4.4.2 and Ninebot V4.2.0.   Tried connecting to both apps to get Battery app to connect to Bluetooth, but still no success.  Do want to thank you for your post and suggestions.  Was certainly worth a try.

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