BQ20Z65 Mystery Light Sequence

Thread Starter


Joined Oct 4, 2020
I’ve been given a BMS to see if I can solve an issue. It is built around the BQ20Z65. The cells are all fully charged, but I’m not getting any reading on the output. When it’s hooked up to a power supply the fuel gauge reads fully charged. However, when I disconnect the power source I get a strange light sequence on the fuel gauge LEDs. Has anyone come across this before?