No harm, the car wireless charger on the mobile phone is not much damage, under normal circumstances, basically no impact, because the car wireless charger working frequency is basically below 1M, so the signal of the mobile phone will not have an impact.
And the wireless charger mainly uses inductive coupling technology, because the coupling technology is mainly generated by the magnetic field of the coil, the internal component of the battery itself cannot constitute a magnetic field, so it will not damage the internal structure of the battery during the power-on process.