Because the battery charging is the process of converting electrical energy into chemical energy, the energy will be lost in the conversion process, so the heat within the safety level is a normal phenomenon, if the mobile phone is particularly hot (the degree of holding the mobile phone), it is necessary to disconnect the charging data cable immediately to ensure safety.The reasons for hot mobile phone charging are generally:1. Playing with the mobile phone while charging is easy to cause the mobile phone to heat up.2. Poor quality charging banks and data cables are also easy to cause overheating of mobile phones.3. Overcharging causes heat, and the current should be smaller and smaller after the phone is full, and the charging power will be smaller. Poor quality charging treasure or charging head will continue to output high power, resulting in hot mobile phone.4. Many mobile phones now support fast charging, and the voltage and current when charging are relatively high, so the charging temperature will be higher than that of non-fast charging mobile phones, and there will be hot situations.Further information:With the continuous iteration of mobile phone products, there are more and more fast charging protocols on the market. It should be noted that when choosing charging equipment, you should choose the charging head\/charging bank that matches your mobile phone, so as to maximize the charging efficiency and experience the convenience brought by fast charging.
Using the built-in wireless charging function of the charging bank to charge the phone, a little bit of heat, this is a normal phenomenon. In fact, charging the phone with a charger will also be a little hot.
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Compared with wired charging, the heat generated by wireless charging is higher, which is determined by the technical principle of wireless charging. At present, mobile phone wireless charging is the use of electromagnetic induction technology. In the process of charging, the charger will convert the electrical signal into an electromagnetic signal, and then the phone will convert the electromagnetic signal received into an electrical signal.
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Standard wireless charging uses electromagnetic induction to generate an electric current that drives the circuit to work. At the transmitting end, through the inductor (coil), resonant capacitor and control chip together to form an LC oscillation circuit, through the frequency range of 110-205kHz oscillation, at the receiving end due to the changing magnetic field will generate current to charge the mobile phone, now the wireless charging bank production is very small, many manufacturers use cheap circuit materials. So too much current consumed on the components will generate too much heat. Therefore, choose big brand products, this aspect will be better, the wireless charging scheme of big brand products will have 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.