During the use of the mobile power polymer battery, the battery will bulge due to excessive charging current, overcharge and other reasons. There are also low-priced bulging polymer lithium batteries for sale on the shopping network. For this type of polymer lithium battery with gas inside If you continue to use it, it will not only heat up, swell, and cause safety hazards, but also accelerate battery damage. Therefore, you must remove the internal gas before you can continue to use it. Here is a simple way to remove the internal gas of the polymer lithium battery.

　   1. Preparations:

　　Find a ventilated place and prepare polymer batteries, scissors, bill holders, toothpicks, transparent silicone rubber, scotch tape, syringes, and infusion needles with a plastic tube;

　　 2. Pumping preparation:

　　Connect the syringe to the infusion needle, hold the needle in a suitable position at the lithium battery seal, and then fix the needle with tape to keep it from shifting. Use a toothpick to apply a small amount of silicone rubber to the needle to prevent air leakage.

　　 3. Gas extraction:

　　 Pull the syringe to extract the gas from the battery. After filling a tube, clamp the plastic tube of the needle with a bill holder, separate the syringe from the needle, discharge the gas, and then connect the syringe to the needle and repeat the operation.

　　 Four. Seal:

　　After many operations, the battery encapsulation aluminum film will gradually tighten and close to the battery body, and the battery will become very hard. When the gas cannot be extracted and the battery is close to a vacuum state, clamp the plastic tube behind the needle with a clip, cut a small piece of transparent tape with scissors, and stick it to the needle hole, press it and set the needle, and the operation is complete.

　　 5. Quality inspection:

　　Because the pinhole is very small and it is sealed with silicone rubber and transparent tape, the gas will not enter the battery again. After a few hours after the silicone rubber is cured, test the battery. First, use a small current to fully charge and discharge several times. If the problem of outgassing no longer occurs, the treatment is completed. If there is still gas generated, you can follow the above process again and operate again. If the problem still cannot be solved, the battery has been scrapped.