Welcome to the forum!
I can't image what a "bat" is, in the way you're using it. But generally, there are 2 ways to do this. And since I don't know exactly what it is, I'm not sure which would be best.
The first step is to import the image you scanned into Inkscape. File menu > Import.
After that, you can either trace it "manually" using Inkscape's Pen/Bezier tool, or trace it automatically using Path menu > Trace Bitmap. If it's a very intricate and highly detailed image, you might be better off tracing with the Pen tool. If it's relatively simple, Trace Bitmap should work fine.
Next, if it's not still selected, click on the imported image with the Selection tool
, to select it.
Path menu > Trace Bitmap
The Brightness Cutoff option is probably already selected by default. Depending on the image, the default Threshold value is probably fine. If the scanned image is very clean, you can probably just click OK, to start the trace. If it's not so clean, you might need to switch to the Options tab in the Trace Bitmap dialog, and get rid of the stray marks and smudges.
The trace will be created right on top of the original. If the original is black, you might not notice that anything has happened. But the results should be there. Just drag the result away from the original. And there you go!
It sounds like you must already know what to do next. Like I guess you need to save the results in a certain format? Or maybe you need to use a gcode extension?
