What are the repair principles of mobile phone lithium batteries?

The principle of three lithium battery repair methods: the principle of lithium battery repair method one: the metal surface of the lithium battery that has been 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. A rubber sassafras or other cleaning tools can wipe off the rusty material on the surface and make the battery contact with the phone better. The principle of the second method of lithium battery repair: Professor Ye Gaoxiang from the Department of Physics of Zhejiang University gave a professional explanation on this lithium battery freezing therapy: low temperature can change the electrolyte inside the lithium battery and promote the chemical reaction of 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 significantly, resulting in temporary inactivity inside the battery and reduced leakage current. So after recharging, the standby time of the phone will increase. The cycle life of lithium batteries is about 600 times. If the number of charging is increased, the thermal motion 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. Professor Ye said that once the microstructure in a lithium battery is destroyed, it is impossible to fully recover. Long-term use of this method will accelerate the loss of mobile phone batteries. The principle of the third method of lithium battery repair: deep discharge of the mobile phone is to achieve a deeper recharge by depleting the internal electric energy, 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. Mobile phone lithium battery repair-the whole process of freezing therapy: the original Nokia BL-5C lithium battery bought in April 2009 was used as the experimental object. The lithium battery has been used for nearly two years. Under normal use, the standby time of this mobile phone can be maintained for about one day. If there are more calls, the duration of the battery will be shorter. If the average talk time for each call is 3 minutes, and the phone is answered or dialed 10 times, the battery will be in jeopardy. Before the test, turn off the phone and turn it on again after the battery is fully charged. After that, I don’t use this phone to answer or make any calls, nor do I send or receive text messages. In the absence of any interference, the mobile phone stands by quietly and is completely out of power after nearly 3 days. Enter the experimental stage: put the lithium battery of the mobile phone equipped with the whole body into the freezer compartment of the refrigerator (to prevent the lithium battery from getting wet, first wrap the mobile phone firmly with plastic wrap, and try to be as compliant as possible. A total of three layers are required inside and outside to ensure The lithium battery is in a vacuum state. Then, three layers of newspaper are wrapped outside the plastic wrap to completely seal the cell phone battery). After 48 hours, the lithium battery was taken out, and the six layers of paper film wrapped around the battery were removed one by one. The battery did not swell or deform due to freezing. After cooling for a period of time, put the lithium battery into the phone to fully charge it and turn it on. In the same situation, the phone that would have automatically shut down on the third day only lost one cell on the screen. One week later, there is still one cell remaining on the phone screen. It was not until the ninth day that the phone sounded a warning tone due to insufficient battery power. 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: How to buy electric vehicle batteries?