Airwheel Q3
The Airwheel Q3 260wh has two paralleled 130Wh battery packs, each with its own BMS (battery management system). Even this setup, if not shunted, is still dangerous, tatane33 has had a fractured jaw because of a sudden power cut on his Q3. Peppuzzo has shunted both BMS for added security. He wants a fail safe wheel, which is understandable even if shunting just one BMS is probably enough.
Source peppuzzo of http://forum.electricunicycle.org
Airwheel Q3 clone
Q3 clone, before and after the shunt. Note the manufacturer has make a bad wiring, soldering together C- and P-, which means the BMS has no overcharge protection !!
Source smallexis from trottinetteselectriques.heberg-forum.fr
Airwheel X3
Shunt directly B- to P- instead of shunting the mosfets. Very easy to do.
Airwheel X8
T1 and X1 are not easily distinguishable. When in doubt, shunt only the two middle Mosfets.
Hi,
I had no idea what shunting was until I came to this page. What wire do I need to use to do the shunt? And At the ends, is that just soldering wire?
I have an X3 btw. I’m assuming the B- and P- are far enough that I have to do the shunt with a wire?
Yes, soldering a wire is all is needed to shunt and secure your X3. I use a thick wire, eg from a kitchen appliance.
Would a iphone charging wire work? Btw, thanks for this write up!
No, too thin.
Use a wire as thick as the thickest wire in your wheel.
Hi, in the X3 isn’t possible to do the same as the X8? if not, can you publish a pic. Just to be sure how it’s done?
Unless the B- and P- markings are not clear on your X3’s BMS (it happens sometimes), just do as said above : connect B- to P- by a wire.
If not sure, publish your picture with a drawing of the wire and ask confirmation before soldering. The mod is much easier than you think !