@Lia said in battery connector pinout:

If you did want to connect the external pack so it turns on/off with the board you'd want to get a BMS that will turn on with a momentary input since the power button on the OW isn't toggle/latching and is instead momentary. If you could get one then you could in theory connect up the thin blue wire and either of the larger black wires to trigger the external BMS. I briefly went over tricking the OW BMS to turn on with this method in another post.

I saw your video before, i did not know it was you, thanks !
Yes that is exactly what I want to do.

Most cheap BMS don't have switch, some do, and I feel it will be difficult finding one compatible with the proprietary FM 60V shorted to GND pulse.

Maybe the way is to add a "low pulse trigger" latching relay to a BMS with a switch :
either directly on blue pin #1, either through a resistor divider to lower its 60V voltage.

Thank you Lia, excellent ! I might as well solder.
I did not know Radimklaska, what an impressive work !

How did you manage the "on/off switch" of your external battery ?

What I understood from the (great) Sonny Wheels video : there is no switch for the external battery, since you can plug and unplug it, and since its BMS is integrated in the EGO battery.
I find it potentially unsafe (if young children...) + it takes some brain to think about connecting this before that....

That is why I am looking for a way for the external battery pack BMS to share the onewheel switch with the internal battery pack BMS.

Hi,

I am thinking about making my own additional battery pack, connected with vampire plugs on the battery connector.
Battery would be a 16s1p 26650 LiFePO4 with its own BMS.

I would like to use the stock charger (on the XLR plug) to charge both batteries at once, and to be able to turn on / off both batteries with the original switch.

For that switch I am looking for the pinout of the big 16 pins battery connector.
Has anyone done that ? (I have a V1, not sure it is the same for all models)

So far here is what I have read or tested :

1 : blue : BMS switch when shorted to Bat -
2 : not connected
3 : yellow : rear led ?
4 : orange : rear led ?
5 : black : BMS ?
6 : green : BMS ?
7 : Power Bat GND, connected to XLR port pin 1 : charge GND
8 : Power Bat+ (via BMS)
9 : violet : connected to XLR port pin 2 : charge +
10 : red : BMS ?
11 : brown : rear led ?
12 : grey : rear led ?
13 : not connected
14 : white : BMS ?
15 : Power Bat GND (connected to 7)
16 : Power Bat+ (via BMS) (connected to 8)

Thanks,
Arnaud

I could finally open the box (damaging it) and there was indeed a loose capacitor (a big one :550uF) that I soldered back with no luck.
This Fuyuang charger was sent to me with my Kickstarter V1.

hi,
my fast charger has stop working and i am pretty sure something has to be soldered back as i can here a moving part inside the box.
but how to open that black box. no screws.
has someone succeeded ?
thanks,
Arnaud

@sage954
And maybe they replaced 18650 LFP cells by 26650 NMC, which could explain both the added range and the little extra weight ?
In that case the board should be few mm thicker

Apriori un remplacement de la batterie LFP par une NMC, donc 2 fois plus d'énergie massique et un poil moins de puissance (sûrement limitée par le moteur de toute façon).

Les tensions d'utilisations sont légèrement différentes mais proches, peut être qu'il sera possible d'upgrader nos boards en remplaçant le pack et le chargeur ? (si quelqu'un s'y connait je doute que FM propose de canibaliser ses ventes :-)

No but sometimes i use a mini bluetooth earbud to get google nav from my Phone when I ride:
https://www.amazon.com/EZ-Generation-Earbud-Smallest-Headphones-Smartphones-Black/dp/B06XTXL2DS/ref=sr_1_9?ie=UTF8&qid=1497907859&sr=8-9

Cyborg feeling but it works

me too! i do that almost each time on my V1