Wireless charging itself is not efficient, resulting in most of the electricity is converted into heat output, so depending on your current situation, there are two solutions,
Improve your wireless charging conversion efficiency as much as possible and optimize the control algorithm
Enhance your heat dissipation by adding heat sinks or air cooling
General wireless charging program will have a temperature control circuit and NTC thermistor, this function is mainly to prevent the circuit in the process of working to generate too much heat, burn components, etc., can also control the power components after generating too much heat, reduce the power, thereby reducing the temperature, this function is very important.
Wireless charging is inherently low efficiency, heat is normal, so high-power wireless charging requires air cooling fan heat
Because the mobile wireless charging device of the mobile phone in wireless charging, the heat itself is serious, if the heat continues, it will cause irreversible damage to the components of the mobile phone, including the motherboard and battery, so the equipment manufacturer can only reduce the temperature rise by reducing the charging current, so when the temperature of the mobile phone reaches a certain threshold, its wireless charging efficiency will be very slow.