The repair method of lithium battery of mobile phone

Common phone lithium battery of three methods of repair:

1. Using clean eraser or other cleaning tool gently wipe material of lithium batteries metal contact and the metal contact on the mobile phone, and contribute to the charge condition of the power lasting.

Symptoms:

[clap your hand slightly, and then the phone will turn itself off]

2. The old phone used in automatic shutdown lithium battery with plastic wrap tightly wrapped around it, as far as possible docile parcel, inside and outside a total of three, to ensure that the battery is in a vacuum state. Then, the three-layer newspaper on the outside of the plastic wrap is used to completely seal the lithium battery. After being placed in the frozen layer of the refrigerator, after 48 hours, the battery was taken out, and the six-layer paper film wrapped outside was removed one by one. The lithium battery was not swollen or deformed due to freezing. After cooling for a while, then charge.

3. Discharge the lithium battery that is nearly scrapped and recharge it to activate the battery. The specific method is: deep discharge of the mobile phone by exhausting the internal electric energy, to achieve a deeper degree of recharging, which requires some unconventional methods. Connect the phone to a low-voltage small light bulb with a specific device, and the internal power of the battery will be transferred to the small light bulb until it is completely illuminated. “The mobile phone needs to slowly run out of power through a lower voltage. Under normal circumstances, if the mobile phone is connected below the rated voltage of 3.6 volts, it will automatically shut down.” After the battery is discharged, the rechargeable battery can be used again. Long time.

Principles of three lithium battery repair methods: The principle of

lithium battery repair method 1: The metal surface of the lithium battery used for a long time will have a certain degree of oxidation, resulting in poor contact between the mobile phone battery and the mobile phone, and the lithium battery use time is shortened, and the use A rubber plaque or other cleaning tool can erase the rusting material on the surface and make the battery contact with the phone.

Principle of lithium battery repair method 2: Prof. Ye Gaoxiang from the Department of Physics, Zhejiang University: The low temperature can change the electrolyte inside the lithium battery and promote the chemistry of the battery that has just been frozen. The process of using lithium batteries is actually a charging and discharging process. During this period, the negative and positive charges in the battery collide with each other. The reason why the battery will become more and more useless is because at normal room temperature, the electrons The internal kinetic energy is relatively large, so the battery is in an active state, and the leakage is relatively frequent. When the lithium battery is placed in a low temperature environment, the lithium film on the surface of the lithium battery and the microstructure of the electrolyte, and their interfaces will change significantly. The battery is temporarily inactive and the leakage current is reduced. Therefore, after recharging, the standby time of the mobile phone will increase.

The cycle life of the lithium battery is about 600 times. If the number of times of charging is increased, the thermal motion of the molecule will cause the internal molecules to be arranged. The microstructure is gradually destroyed, and the storage charge efficiency is gradually reduced. "The process of freezing is easy to destroy electricity. The original internal structure, a short time may be able to increase the capacity of charging the charge, but long-term use may not be effective. Professor Ye said that once the microstructure of the lithium battery is destroyed, it is impossible to completely recover it. The long-term use of this method will accelerate the loss of the mobile phone battery.

The principle of the lithium battery repair method 3: deep discharge of the mobile phone, It is to exhaust the internal power to achieve deeper recharging, which requires some unconventional methods. Try to connect the mobile phone to a 1.5V small light bulb, and the internal power of the lithium battery will be transferred to the small light bulb until all are light. "The phone needs to slowly run out of power through a lower voltage. Under normal circumstances, if the mobile phone is connected below the rated voltage of 3.6 volts, it will automatically shut down. "After the power is discharged, the rechargeable battery can be used for a longer period of time. The

lithium battery of the mobile phone is repaired--"Freezing therapy" analysis: The Nokia BL-5C original lithium battery bought in April 2009 as the experimental object. The battery has been in use for nearly two years. In normal use, the standby time of this phone is maintained for about one day. If there are more calls, the battery will last longer. If the average call time per call is 3 minutes, After answering or dialing 10 times, the power is in jeopardy.

Before the test, turn off the phone and turn it on after the battery is fully charged. After that, you don't need to answer and make any calls, and you don't send or receive text messages. In the state of no interference, the phone is quietly on standby, and there is no power at all after nearly 3 days.

Into the experimental stage: put the whole body equipped mobile phone lithium battery into the freezer compartment of the refrigerator (to prevent the lithium battery from getting wet, you need to wrap the mobile phone firmly with plastic wrap, and try to serve as much as possible when wrapping, and need three layers inside and outside to ensure The lithium battery is under vacuum. Then, three layers of newspapers are placed on the plastic wrap to make the cell phone battery completely sealed. After 48 hours, the lithium battery was taken out, and the six-layer paper film wrapped outside was removed one by one, and the battery was not swollen or deformed due to freezing. After cooling for a while, load the lithium battery into the phone and turn it on. In the same situation, on the third day, the mobile phone that would have been automatically turned off will have one less power on the screen. A week later, there was still one extra cell on the phone screen. On the ninth day, the phone was alerted by a low battery.

The performance of the mobile phone lithium battery

before and after the "freeze therapy" test verified that the first time the frozen battery can extend the waiting time of the mobile phone. However, freezing is not the "undead elixir" of mobile phone batteries, and long-term use will damage the lithium battery.

Experts reminded that the price of lithium batteries is not too high, and it is better to purchase a new battery to make it easier to cost-effective. In addition, developing good habits is also a shortcut to extend the life of lithium batteries.