Will charging the mobile phone battery explode for a long time? How to beware of mobile phone battery accidents

Generally speaking, most of the batteries used in smartphones on the market are lithium polymer batteries, and traditional lithium batteries are already very scarce in the world. Lithium batteries are a type of batteries that use lithium metal or lithium alloy as the negative electrode material and use a non-aqueous electrolyte solution. Anyone who has studied high school chemistry knows that the chemical properties of lithium metal are very active and react violently when exposed to water. Therefore, the production and storage of lithium metal require very high environmental conditions. As a rechargeable battery, lithium batteries rely heavily on the movement of lithium ions between the positive and negative electrodes to work. During charging and discharging, lithium ions are intercalated and deintercalated back and forth between the two electrodes; when recharging the battery, lithium ions are deintercalated from the positive electrode and inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. In contrast, lithium polymer batteries are basically the same as lithium batteries in other aspects except that the electrolyte is a solid polymer rather than a liquid electrolyte. The polymer electrolyte material is a general thin film composed of a solution, in which a solid polymer such as polyethylene glycol or polyacrylonitrile oxide is used as a solid solvent. Due to the use of flexible soft-film laminated packaging, in theory, the lithium polymer battery can be made into any shape, which is more in line with the demand for thinner smart phones. Tips to guard against mobile phone battery accidents At least from the current point of view, the safety of lithium polymer batteries seems to be very high, such as fire and explosion are usually difficult to occur. However, from time to time, we also learn about the fire and explosion of mobile phone batteries from media reports, which makes people feel frightened. In this regard, the Chemistry Laboratory of Nanjing University of Science and Technology has carried out actual detection of battery charging safety, which has answered people's questions to a certain extent. The staff in the laboratory will mark the two lithium batteries involved in the detection, one is a normal battery, and the other is a battery with a damaged protection circuit. After charging for more than 12 hours, the normal battery did not show any abnormality, while the battery with a damaged protection circuit exploded after the temperature rose to 100 degrees. When the lithium battery is being charged, there is usually a protection circuit to protect it, so as to prevent damage to the lithium battery due to overvoltage and overcurrent. When the battery overflows, the protection system will automatically identify it, changing from a large current to a small current, so that the phone cannot be charged. Therefore, if the lithium battery is not malfunctioning in the charger and the protection circuit, even if it is charged overnight, it will not cause damage to the battery structure, nor will it cause the battery to catch fire and explode. As for the situation reported by the media that the battery of the mobile phone continues to explode, it is likely that the protection circuit is damaged. It may be considered that the battery has been impacted by external forces such as a drop, or has working experience in a high-temperature and high-humidity environment. In addition, although the safety of lithium polymer batteries is higher than that of lithium batteries, there are still several points to pay attention to in daily use. First, make sure to use the original battery and charger. Of course, there are more products with integrated body design, which is not a problem. The second is that charging the mobile phone for a long time is not terrible, but pay attention to the environment when the mobile phone is charging. The heat dissipation must be good. For example, it is more dangerous to charge the mobile phone under the pillow or under the blanket. Third, once the mobile phone battery swells, you must stop using it immediately. Replace the detachable battery immediately. The non-removable battery needs to be handed over to the regular after-sales service. If it is not used continuously, it may be dangerous. From the early nickel-metal hydride batteries to lithium batteries to today's lithium polymer batteries, the safety of mobile phone batteries is generally improving. Generally speaking, as long as it is properly protected, even if the mobile phone battery is charged for a long time, it is difficult to cause burns or explosions that endanger personal safety, and consumers do not need to worry too much. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Detailed explanation of the aging of lithium iron phosphate batteries