Share knowledge on the use and maintenance of lithium batteries

The use and maintenance of lithium battery How to maintain the lithium battery of our love machine is correct? This problem has been plagued by many loyal users of mobile phones, including me. After consulting some materials, I had the opportunity to consult a PhD student in electrochemistry and the deputy director of a well-known battery research institute in my country. Now write some recent knowledge and relevant experience for your readers. The positive electrode of a lithium battery is usually composed of the active compound lithium, while the negative electrode is carbon with a special molecular structure. The important component of commonly used anode materials is LiCoO2. When charging, the potential on the electrode forces the anode compound to release lithium ions and insert them into the carbon. The anode molecules are arranged in a laminar flow structure. During the discharge process, lithium ions are separated from carbon in the layered structure and recombined with the anode compound. Electric current occurs in the movement of lithium ions. Although the principle of chemical reaction is very simple, there are still many practical problems to be considered in actual industrial processing. The positive electrode material needs to add additives to maintain the repetitive charge activity, while the negative electrode material needs to be designed at the molecular structure level to accommodate more lithium ions. In addition to maintaining stability, the electrolyte between the positive and negative electrodes must also have good conductivity to reduce the internal resistance of the battery. Overcharging and discharging cause permanent damage to the electrode of the lithium battery to the molecular level. It can be intuitively known that the anode carbon emission will cause the excessive release of lithium ions and the collapse of the layer structure, and overcharging will harden too much lithium ions. Into the structure of the cathode carbon, and make some lithium ions can no longer be released. This is why lithium batteries are usually equipped with charge and discharge control circuits. Improper temperature will cause other chemical reactions inside the lithium battery, and unwanted compounds will appear. Therefore, many lithium batteries are equipped with protective temperature control films or electrolyte additives between the positive and negative electrodes. When the battery is heated to a certain extent, the composite membrane pores are closed or the electrolyte is denatured, the internal resistance of the battery increases until the circuit is disconnected and the battery no longer heats up to ensure the battery's normal charging temperature. But can deep charging increase the actual capacity of lithium batteries? Experts told me unequivocally that this is meaningless. They even stated that, with the knowledge of the two doctors, the so-called activation of the first three complete allegations is meaningless to them. But why do many people charge the battery? By recording the discharge curve (voltage, current, time), the chip can sample the charging of the battery. This is what we read in the battery information. The discharge curve of lithium batteries will change after repeated use. If the chip has no chance to read the complete discharge curve again, the calculated charge will be inaccurate. So we need a deep charge to calibrate the battery chip. Finally, my opinion on battery maintenance is: 1. Do not deliberately guarantee the power after each charge; 2. Under the control of the protection circuit, perform a deep charge at regular intervals to correct the battery charge statistics, but this is not Will not increase the actual capacity of the battery. 3. When using the battery for a long time, it should be placed in a cool place to reduce the speed of its internal passivation reaction. 4. The protection circuit also cannot monitor the self-discharge of the battery. If the battery is not used for a long time, a certain amount of electricity should be charged to prevent damage caused by excessive self-discharge during battery storage. In fact, there is not much attention to the use of the battery, in other words, not too much attention. How many times a battery can be used may depend more on the individual differences in the way the battery is made, rather than the way the battery is used. Choosing a reputable mobile phone brand is undoubtedly one of the guarantees of long battery life in the future. 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: What is the bottleneck hindering the development of power lithium batteries?