Vyer:

Question: 

  • The Fluke BT5xx Battery tester is not connecting to the Fluke Battery Management software when connected via usb cable.
    The BT5xx software just hangs and nothing can be selected.

Answer: 

It seems that the serial ports Intel SOL and/or serial over Bluetooth are blocking the communication when these are enabled.
In the example below the two ports , Serial over Bluetooth COM3 and COM4 are disabled and then the communication is working again : 

The other port intel SOL com port looks like this (here it is COM3) : 

Please check if you have these ports in your own pc or laptop and disable these ports and check if the communication to the battery-tester is working again.