Analysis of 18650 lithium battery parameters and repair methods

18650 lithium battery parameters The general configuration of the 18650 lithium battery is as follows: the nominal voltage of a single cell is generally: 3.6V or 3.7V, the charging voltage is generally: 4.20V (lithium cobalt oxide is 4.2V-4.3V) * small discharge termination voltage is generally : 2.75V, lower than this voltage will easily lead to a serious decrease in battery capacity or even scrap *Charge termination voltage: 4.20V Diameter: 18±0.2mm Height: 65±2.0mm Capacity: 1000mAh or more, some brands will be marked with 3600mAh or 4500mAh, etc. The capacity of the current 18650 battery is Sanyo, which can achieve 3100mAh, but the price is not low. 18650 lithium battery repair method 1. Lithium battery repair method: Use a rubber sassafras or other cleaning tools to remove the rusty material on the surface. The first principle of the lithium battery repair method: the metal surface of the lithium battery used for a long time will be oxidized to a certain extent, resulting in poor contact between the mobile phone battery and the mobile phone, and the use time of the lithium battery is shortened. It can be erased with a rubber sassafras or other cleaning tools. The rusty material on the surface makes the contact between the battery and the phone better. 2. Lithium battery repair method two. Remove all your batteries after they are used up. Use temperature to solve the problem. The battery will greatly shorten the use time when the temperature is unstable, because the battery has no electricity and a considerable part of the lithium ion has been taken. If you have a memory battery, you can use this method to release a part of the memory battery. When winter comes, put it outside for a while before taking it into the house. The principle of lithium battery repair method two: low temperature can change the electrolyte inside the lithium battery, prompting a chemical reaction in the battery that has just been frozen. The use process of a lithium battery is actually a charge and discharge process. During this period, the negative and positive charges in the battery collide with each other. The reason why the battery is becoming less and less useful is because the kinetic energy inside the electron is relatively large at normal room temperature, so the battery is in an active state and leakage is relatively frequent. When a lithium battery is placed in a low-temperature environment, the microstructure of the lithium film on the surface of the lithium battery and the electrolyte, as well as their interface, will change distinctly, resulting in temporary inactivity inside the battery and reduced leakage current. So after recharging, the standby time of the phone will increase. 3. There is another way to repair the lithium battery. Remove the battery and leave it for about a week to consume the electricity slowly. You must first use the machine to fully consume the electricity. Then charge it all again. It is estimated that your current charging time must be very short. After the charge is full, disconnect and charge again, and repeat it several times. It is absolutely effective. The principle of lithium battery repair method three: the cycle life of lithium battery is about 600 times. If the number of charging is increased, the thermal movement of the molecules will gradually destroy the internal molecular arrangement and microstructure, and the storage charge efficiency will gradually decrease. The freezing process is likely to damage the original internal structure of the battery, and it may be able to add charge in a short period of time, but long-term use may not be effective. Once the microstructure in the lithium battery is destroyed, it is impossible to fully recover. Long-term use of this method will accelerate the loss of the mobile phone battery. The principle of lithium battery repair method three: deep discharge of the mobile phone is to achieve a deeper recharge by depleting the internal power, which requires some unconventional methods. Think of a way to connect the phone to a small 1.5V light bulb, and the power inside the lithium battery will be transferred to the light bulb until all is discharged. The mobile phone slowly runs out of power through a lower voltage. Under normal circumstances, if the mobile phone is connected to the rated voltage of less than 3.6 volts, it will automatically shut down. After the battery is discharged, the recharged mobile phone battery can be used for a longer time. 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: What are the differences between lead-acid batteries and lithium battery packs?