USB Y cable? One for data one for power? Then use Android Auto for data, and a big Anker Powercore for Power, or use a 12V cig lighter Powerdrive for power.
What a USB Y cable is separate out the pins where the power ones come from a different source from the data pins. If your port is not supplying enough power then stop doing that, use a USB Y cable and have the power supplied from something with more actual power, and then just use data for data.
This sounds like USB OTB hdd drive problem from years ago.
Search for USB Y cables and buy from reputable sources in your locale.