Monday, April 7, 2025

...and that was a fail....battery needs to go back to the drawing board

Good news
  • Initial test was good.  
  • The control board had no complaints.
  • Wire run double check was good.
  • Test ride was short and no signs of over heating.


Bad news

  • two cells were showing wrong values when view with app
  • wire test performed again and nothing wrong found
  • battery was re-installed and then the 3 yellow blinks happened.
  • original batter re-installed and error was gone.


The next steps

  • Check all BMS wires
  • Rework pack configuration on a jig to remove wrapped shape
  • Switch to another wire type a 22 gauge, but this a thinner jacket