It's too cold, can't the mobile phone be recharged?

Yes, its essence is that the battery capacity of the mobile phone lithium battery itself has decreased.

Most of the batteries used in mobile phones are lithium batteries (including mainstream lithium-ion batteries), and the anode and cathode of lithium batteries are electrolyte. When in use, electrons are generated from the negative electrode and reach the positive electrode through the electrolyte to form a current, so the generation of current is a chemical reaction process.

One of the factors affecting the chemical reaction rate is temperature. When the ambient temperature is too low, the electrolyte resistance increases, the chemical reaction rate decreases, and the generated current is relatively reduced.

Therefore, in the low temperature environment, the chemical reaction of lithium battery is seriously affected, which leads to the decrease of battery capacity, so the mobile phone will not be charged.

Extended data

When the mobile phone detects that the battery capacity is low and the ambient temperature is low, resulting in low current, the temperature protection circuit in the battery built-in protection board is started, and the mobile phone will automatically shut down.

Different mobile phones have different "frost resistance". Put different mobile phones in an experimental box with adjustable temperature, and cool them once in a while. When the temperature dropped to-10℃, the screens of the two mobile phones began to dim and entered a low power consumption state.

At -20℃, a mobile phone is automatically turned off. The temperature continues to drop. When the temperature reaches -30℃, the screens and batteries of all mobile phones begin to "crack", and the screens are black or turned off. When the temperature reaches -40~-55℃, all mobile phones "die".

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