Anyone seen this before the BBSHD shuts out?

arrkaye

Finding my (electric) wheels
Nov 13, 2017
20
1
37
london
Voltage seems to bounce all over the place and then shuts down. Reseating the battery sometime resets it, otherwise it randomly starts working again after a bit before this happens again.

With an almost fully charged battery. Tested the battery immedately after and it reads 55.01V.

https://photos.app.goo.gl/A0IjdXyPpvzWVsMT2
 

KirstinS

Esteemed Pedelecer
Apr 5, 2011
3,224
899
Brighton
Could be a few things including poor connection or a weak cell string (or more)

The bbshd is a hungry bit of kit.

What are the battery specs please ?
 

KirstinS

Esteemed Pedelecer
Apr 5, 2011
3,224
899
Brighton
I'll have to look up the cells

But a reading hot of charger should be 58.8v for a 14s battery (14 x 4.2v)
 

KirstinS

Esteemed Pedelecer
Apr 5, 2011
3,224
899
Brighton
That was a decent 5m ride off the charger.
Fair play , id look at a duff connection being a good possibility then. If start with battery connection ( internal and external on both sides of battery and connector,)

Look for a break where the solder is soldered, I've seen a good few breaks here with physical connection which moves apart through vibration giving these symptoms (on other kits though to be fair)

Also personally had a few internal welds go on cell pack itself. Similarly with contact held but weaker or broken intermittently through vibration. Same symptoms

If it's software I'm notb any use to you !