What are the repair methods when lithium batteries start to age?

When the mobile phone lithium battery begins to age, it generally shows that the display voltage is basically normal when the mobile phone is unloaded, and the battery power indicator is basically full, but the standby time is short, it will automatically shut down after a call, and it will soon appear to be overflowing when charging. You can try the following methods to correct this type of battery. Lithium battery correction method 1: Discharging can adopt the method of power-on discharging or connecting resistance. The power-on discharge should be placed to the extent that the mobile phone stops immediately after power-on; the resistance discharge can be used for long-term discharge of small bulbs connected to the corresponding voltage, until the small bulbs are connected to the extent that they will go off instantly. The discharge current is preferably a large current. Lithium battery correction method two: activate the 12V alternating current in series, and connect a small electric bead or resistor in series between the batteries for current limiting. First select a small current to activate, make the control loop alternating current to tens of milliamperes, maintain 30 to 60 minutes, and then increase the current to 1 to 2 times the nominal value of the battery. For example, if a 1000 mAh battery is added to 1000 to 2000 mAh, it will activate for 30 to 60 minutes. During the above process, pay attention to observe the temperature and appearance of the battery: there should be no abnormal phenomena such as hot, smoke, bulging, etc., and the current should be appropriately reduced if the temperature is too high (above 40°C). Lithium batteries after the above activation solution can generally be used normally, but they cannot be compared with new batteries! Lithium battery correction method 3: freezing (experienced by netizens) A few days ago, a lithium battery could not be used. The symptom was that it could not be charged and the camera could not be turned on (the camera appeared to be out of power), so I tried it. This has been the case several times. There is no other way but to discard one side, just throw it into the trash can. Later, I didn’t know what ideas I had. I sealed the battery with multiple layers of absorbent paper and multiple layers of plastic film and put it in the refrigerator freezer (minus 18 degrees) for two days and nights. After taking it out, it was packaged and placed at room temperature for two days. Unwilling to try to put it in the camera again, hey, it's completely recovered! Let me tell you all, if you have the same situation, you might as well give it a try! 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 article: Working process and design points of lithium iron phosphate battery pack protection board