How to repair the power lithium power battery

In the case of a battery pack, a battery pack consists of N batteries connected in parallel and N parallel batteries connected in series. Leveling each string of cells can increase battery capacity and performance. At the same time, measure the protection board of the battery pack to see if its functions are normal, such as self-consumption, overcharge and over discharge. If it is a single-cell battery, there is no way to improve its performance. When it is used again, try to keep it charged until the maximum voltage is off at 4.2V. When the minimum voltage is 2.8V, stop using it and charge it. Internal faults in lithium-ion batteries cannot be repaired.

Three methods for authoritative lithium power battery repair

Three methods for repairing common mobile phone lithium power batteries:

1. Use a clean eraser or other cleaning tool to gently wipe the metal contacts on the lithium power battery and the metal contacts on the phone to help with the charging status and power lasting.

2. The old mobile phone lithium power battery that will be automatically shut down will be wrapped tightly with plastic wrap. When wrapping, try to serve as much as possible. There are three layers inside and outside 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 power battery. After being placed in the freezer 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 power battery was not swollen or deformed due to freezing. After cooling for a while, then charge.

3. Discharge the lithium power battery that is nearly scrapped and recharge it to activate the battery. The specific method is: deep discharge of the mobile phone, by exhausting internal electrical 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 fully illuminated. “The mobile phone needs to slowly run out of power through a lower voltage. Under normal circumstances, if the mobile phone is connected to a rated voltage lower than 3.6 volts, it will automatically shut down.” After the battery is discharged, the rechargeable battery can be used again. Long time.

Step / method

1 mobile phone lithium power battery repair - "freezing therapy" process analysis:

2 The original lithium power battery bought in April 2009 was used as the experimental object. The lithium power battery has been used for nearly two years. In normal use, the standby time of this mobile phone is maintained for about one day. If there are more calls, the battery will last longer. If the average talk time per call is 3 minutes, answering or dialing 10 times, the power is in jeopardy.

3 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 without any interference, the mobile phone quietly stands by, and there is no power at all after nearly 3 days.

4 Enter the experimental stage: Put the whole-equipped mobile phone lithium power battery into the freezer compartment of the refrigerator (to prevent the lithium power battery from getting wet, you need to wrap the mobile phone firmly with the plastic wrap, and try to serve as much as possible when wrapping, there are three layers inside and outside. Make sure the lithium power battery is under vacuum. Then, bake the three-layer newspaper outside the cling film to make the cell phone battery completely sealed. After 48 hours, the lithium power 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, put the lithium power battery into the phone and turn it on. Under the same circumstances, 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.

5 The performance of the "frozen therapy" test before and after verification 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. Long-term use can damage lithium power batteries.

Precautions

The lithium power battery has a cycle life of about 600 times. If the number of times of charging is increased, the thermal motion of the molecule will gradually destroy the internal molecular arrangement microstructure, and the storage charge efficiency will gradually decrease. The "freezing process is likely to damage the original internal structure of the battery, and may increase the capacity to charge the charge in a short period of time, but long-term use may not be effective." Professor Ye said that once the microstructure of the lithium power battery is destroyed, it must be fully recovered. It is impossible, long-term use of this method will accelerate the loss of mobile phone batteries.

Experts reminded that the price of lithium power batteries is not too high, rather than laborious to repair lithium power batteries, it is better to buy a new battery to be more cost-effective. In addition, developing good habits is also a shortcut to extend the life of lithium power batteries.

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