Why does the mobile phone automatically turn off when it is extremely cold?

Do you think your phone will run out of power in winter? Sometimes, the battery shows that there is still a lot of power, but it is at stake shortly after it is turned on in the cold wind. Experts say this is because most mobile phones use lithium batteries, which consist of electrolyte between the positive electrode, the negative electrode, and the positive and negative electrodes. The negative electrode chemically reacts with lithium ions, and the lithium ions move to the positive electrode under the use of electric current. At low temperatures, the chemical reaction of lithium batteries slows down, so the discharge current becomes smaller and the charge decreases. Women are more likely to have this situation because they tend to put their mobile phones in their bags, while men tend to put their phones in their pockets or trouser pockets, which are originally used to keep warm. British mobile phone expert Rob Kerr suggests that you put your phone in your inner pocket, or you can match it with a more sturdy phone bag, which can help you get through the winter. Why does the mobile phone automatically shut down in severe cold? Test data: The power consumption of the same mobile phone at -5°C is 1.7 times that at 20°C. Expert solution: The fact is that the drop in lithium battery current leads to a decline in usable capacity. In many areas of Sichuan, low temperatures broke records, people were wrapped in bears, trees had ice, even cellphones were frozen and even sleeping: turning off the battery consumes fast, and the screen appears double shadows. Is it really that fragile to automatically turn off the phone if you don’t pay attention to it, cold shutdown? On the 25th and 26th, the reporter cooperated with professional laboratory institutions to simulate different temperature environments to test the power consumption and operation of the mobile phone. The effect flashed once. The same mobile phone was fully charged and used for 25 minutes. The -5°C environmental consumption was 1.7 times that at 20°C; when the temperature was cooled down together, different brands of mobile phones were killed. However, what is exquisite is not a mobile phone, but a lithium battery. Experts said that in cold weather, the automatic shutdown of the mobile phone is caused by the protection mechanism, which is a normal phenomenon. Mobile phone cold resistance test equipment: constant temperature (constant humidity) test chamber Test unit: Sichuan Electronic Products Supervision, Inspection and Quarantine Bureau Low temperature shutdown is a normal phenomenon of mobile phone self-protection. Cold shutdown damages the phone? In low temperature conditions, the phone will automatically shut down. Will it damage the phone? A professional repairer of a certain brand of mobile phone said that the automatic shutdown in this case is due to the protection mechanism of the phone. When the mobile phone detects that the battery is low and the ambient temperature is too low, resulting in too low current, when the temperature protection circuit of the built-in battery protection board is activated, the mobile phone will automatically shut down. The maintenance personnel said that at this point, if the key is pressed immediately, the equipment cannot be opened. When the ambient temperature returns to normal and the temperature protection circuit is turned off, the phone can work normally. What should a low-temperature machine do? In order to prevent the above situation, in a low-temperature environment, it is best not to use the mobile phone for a long time. When you go to put the mobile phone in your pocket, bag and other local insulation, you can also buy a thick book Cell phone to keep warm. In fact, compared with low temperature, the more serious is the condensed water. When you return indoors from the cold outside, the warm indoor air will condense when it gets cold, causing moisture to form on your phone. If moisture enters the motherboard, the phone will be affected by the moisture, and the display may not turn on. Therefore, in the case of a large temperature difference, in order to prevent exposure of the mobile phone, it is possible to plug in a headset if it is necessary to make a call. Scientific expert illusion: Lithium battery consumes fast at low temperature. Essence: The current decreases and the capacity decreases. As a mobile phone, it is so afraid of cold, is it really good? Zhou Kaiqiang (transliteration), an engineer at the institute, said that in fact, mobile phones are not afraid of Cold, but battery. Smart phones use lithium batteries. Between the positive electrode and the negative electrode of a lithium battery is an electrolyte. When using the mobile phone, the battery will discharge. The negative electrode is separated from the lithium ions through a chemical reaction, and the lithium ions move to the positive electrode through the dielectric. During the activity of lithium ions, electrons move, and then an electric current appears. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Analysis of heavy metal content in various batteries