Voltage bounces around and cuts. Faulty controller?

[jaz2]

Voltage bounces around and cuts on BBS02.

Sometimes the display will read true voltage (~48v for the 13s) leading me to believe some electrical wire/element is loose. The battery has a built in battery indicator (indicating ~75%) so I dont see the need to test each cell. I dont have break/shifting cutoff sensors. I did bang the bottom of the motor/controller going over a log.

To fix, I'm considering 1) Resetting the firmware via USB 2) buying a replacement controller (if its faulty) that can handle more amps.
Any ideas on how to troubleshoot?

 

[jaz2]

Update: Seems to be an intermitted connection issue. When voltage is down, there is a clicking sound from the battery. youtube.com/shorts/luWIuDnUdwY

I will open the battery and take a look at the connections.

 

[fighting_haggis]

Hey I have the same issue as you do. I think I have found the problem. I removed the battery cradle connector to discover the +ve connection all charred! Likewise the +ve battery connection was all charred so its obviously been arcing(clicking noise) I've cleaned up the contacts and filled the cradle connection(female) with electrical conducting jelly and now everything seems to be working as should.

 

[jaz2]

Thanks I do in fact think this is the case. I cleaned the battery to wire connectors with alcohol, cotton swabs and WD 40 electrical cleaner. It worked for a few days. Have not thought of using Electrical Conducting Gel used for EKG and medical procedures.

 

[il Munduato]

Thanks I do in fact think this is the case. I cleaned the battery to wire connectors with alcohol, cotton swabs and WD 40 electrical cleaner. It worked for a few days. Have not thought of using Electrical Conducting Gel used for EKG and medical procedures.

A bandaid at best and more than likely to make things worse and possibly dangerous.
You have to replace the connection. Period.