A circuitry for detecting a temperature of a wireless charging coil , comprising: a target resistor coupled to the wireless charging coil in series to form a series circuit; a voltage supply circuit coupled to the series circuit and configured to apply a target voltage to the series circuit during a charging process of the wireless charging coil , a voltage detection circuit coupled to the series circuit and configured to obtain a first measured voltage across two ends of the wireless charging coil and a second measured voltage across two ends of the target resistor when the target voltage is applied, the first measured voltage is a voltage generated by the target voltage across the two ends of the wireless charging coil , the second measured voltage is a voltage generated by the target voltage across the two ends of the target resistor ; and a processing component coupled to the voltage detection circuit and configured to: determine a working current of the series circuit based on the second measured voltage and a resistance of the target resistor ; determine a real-time resistance of the wireless charging coil based on the first measured voltage and the working current; and determine a real-time temperature of the wireless charging coil based on the real-time resistance of the wireless charging coil ; said circuitry being characterized in that the voltage supply circuit comprises a low-frequency signal generator configured to apply the target voltage to the series circuit during the charging process of the wireless charging coil , wherein the target voltage is an alternating-current (AC) voltage with a frequency of 40 Hz. a target resistor coupled to the wireless charging coil in series to form a series circuit; a voltage supply circuit coupled to the series circuit and configured to apply a target voltage to the series circuit during a charging process of the wireless charging coil , a voltage detection circuit coupled to the series circuit and configured to obtain a first measured voltage across two ends of the wireless charging coil and a second measured voltage across two ends of the target resistor when the target voltage is applied, the first measured voltage is a voltage generated by the target voltage across the two ends of the wireless charging coil , the second measured voltage is a voltage generated by the target voltage across the two ends of the target resistor ; and a processing component coupled to the voltage detection circuit and configured to: determine a working current of the series circuit based on the second measured voltage and a resistance of the target resistor ; determine a real-time resistance of the wireless charging coil based on the first measured voltage and the working current; and determine a real-time temperature of the wireless charging coil based on the real-time resistance of the wireless charging coil ; said circuitry being characterized in that determine a working current of the series circuit based on the second measured voltage and a resistance of the target resistor ; determine a real-time resistance of the wireless charging coil based on the first measured voltage and the working current; and determine a real-time temperature of the wireless charging coil based on the real-time resistance of the wireless charging coil ; said circuitry being characterized in that the voltage supply circuit comprises a low-frequency signal generator configured to apply the target voltage to the series circuit during the charging process of the wireless charging coil , wherein the target voltage is an alternating-current (AC) voltage with a frequency of 40 Hz. <EOS>