VIN and GND to charge battery?
I would like to place the Expansion Board with a mounted WiPy in my peocet device. unfortunately there is not enough space to connect a cable to the USB port.
Can I simply connect a power source (5 V) to VIN to power the WiPy and charge the battery at the same time?
I guess the easiest is to connect your GND to the GND pin as normal and your 5V to the component pointed by the arrow on the USB input below (which I think is some kind of fuse?)
Either side of that component will work, maybe the circuit will be more protected on the top part but then it's very easy to short it to the USB connector (which is grounded).
If you do it make sure to isolate USB connector from your soldered connection with some mylar tape or insulating varnish - as I said above the connector is grounded and it's easy to short it!
@jmarcelino Thanks for your answer!
Is there another way to supply the power like the USB port does? I would even solder the cables to the board, but don't know where. Are there any schematics?
No, that path overrides the charge controller chip (BQ24040).
May be downright dangerous with LiPos because you could then charge the battery at higher currents than expected.