Reasons for the expansion of polymer lithium battery packs and analysis of drum maintenance technology

Reasons for swelling of polymer lithium battery packs 1. The problem with the manufacturing level of lithium battery packs is uneven electrode coating and rough processing technology. 2. The violent reaction of the short circuit generates a lot of heat, which causes electrolyte analysis and gasification, and the lithium battery swells. 3. In addition, when the polymer lithium battery does not need time for the pilot, it will swell, because the air is conductive to a certain extent, so the long release time is equivalent to the direct contact of the positive and negative electrodes of the battery, and a chronic short-circuit is performed. 4. Reasons for the poor quality of the lithium battery charger: the charger uses inferior boards, refurbished or inferior components, heating, and inaccurate parameter drift, which makes the charging limit out of control, causing the internal gas of the lithium battery to squeeze, resulting in deformation of the battery shell, charging cracking explosion. 5. The charging time is too long. If overcharging will cause a large amount of gas to wash the plate, cause the active material inside the lithium battery pack to fall off, shorten the battery life, accelerate the battery loss rate, affect the electrolyte analysis, increase the battery temperature, and make the battery overflow! Polymer lithium battery pack drum maintenance technology 1. Preparation work Find a ventilated place, prepare polymer lithium batteries, scissors, clips, toothpicks, 705 translucent silicone rubber, translucent tape, syringes, injection needles and a section of plastic tube (not required least). 2. Preparation of the air pump Connect the syringe to the infusion needle, fix the needle on the seal of the lithium battery pack, then fix the needle with tape, and apply a small amount of 705 silicone rubber around the needle with a toothpick to prevent air leakage. 3. Gas extraction Pull the syringe out of the gas from the battery, pump out a complete tube, clamp the plastic tube of the needle with the needle, separate the syringe from the needle, and discharge the gas (although the gas in the battery is non-toxic, it does not smell Okay, so find a ventilated place), then connect the syringe to the needle, and do it over and over again. 4. Sealing After many operations, the packaging aluminum film of the battery will gradually tighten and stick to the battery body, and the polymer lithium battery pack will become very hard. When the gas cannot be extracted and the inside of the battery is close to a vacuum state, the plastic tube behind the needle is clamped with a clip, and a small piece of translucent tape (1 cm square) is cut with scissors and attached to the needle hole. Press the needle to complete the operation. V. Quality inspection Since the pinhole is very small and sealed with silicone rubber and translucent tape, the gas will no longer enter the battery. After several hours of curing of the silicone rubber, the lithium battery pack is probed, and the lithium battery pack is charged and discharged several times under a small current. If there are no more swelling problems, the treatment will be complete. If there is still gas, you can follow the above process again and operate again, if it still cannot be processed, the battery has been scrapped. I bought more than a dozen low-priced polymer lithium batteries online. After the above solutions, they have returned to normal use and the effect is very good. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.