That should work. Depending on the timescale of the battery startup, it may also be sufficient to move the ping setup to just before the ping360 bridgemanager line, or even just run ping_enumerator.py again.
If that doesn’t work you may need longer, in which case you can add a sleep 1 (or some other number of seconds) before ping_enumerator gets run, to allow the battery time to turn on fully. That also slows down the rest of the startup process, but a second or few for consistent connection results is likely worth it 