The repair principle of lithium-ion batteries:
The principle of lithium-ion battery repair is to repair the voltage difference of the lithium-ion battery pack, so that each string of the battery pack can be fully charged and discharged to maximize the utilization of the stored energy. If there is a faulty cell, its voltage can be detected by testing equipment, and it can be replaced accordingly, rather than replacing all cells due to single damage, which saves costs.
Methods for repairing lithium-ion batteries in mobile phones:
Method 1 for repairing lithium-ion batteries: Over time, the metal surface of lithium-ion batteries will oxidize to a certain extent, which will lead to poor contact between the battery and the phone, and shorten the battery's lifespan. You can use an eraser or other cleaning tools to wipe away the rust on the surface and improve the contact between the battery and the phone.
Method Two for Repairing Lithium-ion Batteries: Low temperatures can alter the electrolyte inside a lithium-ion battery, promoting a chemical reaction in a battery that has just been frozen. The use of a lithium-ion battery is essentially a charging and discharging process. During this process, negative and positive charges collide with each other. Batteries become less durable because at normal room temperature, the kinetic energy inside electrons is relatively high, making the battery more active and prone to leakage. Placing a lithium-ion battery in a low-temperature environment significantly changes the microstructure of the lithium film and electrolyte on the battery surface, as well as their interfaces, leading to temporary inactivity inside the battery and reduced leakage current. Therefore, after recharging, the phone's standby time will increase.
Method 3 for repairing lithium-ion batteries: Deep discharge of the phone. This involves completely depleting the internal energy to achieve a deeper recharge, which requires unconventional methods. Connect the phone to a 1.5V light bulb. The energy inside the lithium-ion battery will be transferred to the bulb until it is completely discharged. The phone will slowly deplete its energy using a lower voltage. Normally, if the voltage drops below the rated 3.6V after being connected to the power source, the phone will automatically shut down. After being fully discharged, the recharged battery can be used for a longer period.
