Reasons for swelling and swelling of polymer lithium-ion batteries and the handling steps

Polymer lithium-ion batteries, lithium iron phosphate batteries, etc. are all afraid of the internal short-circuit of the battery, the external short-circuit of the battery, and the environment of overcharging. Lithium-ion battery bulging is caused by the accumulation of irreversible dendrites. The correct usage is that in most environments, only half of the power is used up and then the power is added. In a few environments, a complete discharge and complete discharge are performed. Recharge and nursed back to health. What is the reason for the charging expansion of polymer lithium-ion batteries? Polymer soft-packed lithium-ion batteries are called lithium polymer batteries. Compared with liquid lithium-ion batteries, they have high energy density, smaller size, ultra-thin, lightweight, and high security. And many other obvious advantages. But the disadvantage is also stable, prone to bulging. The polymer lithium ion battery is swollen, indicating that the battery is broken, and your battery should be a polymer lithium battery. This is probably the case when the battery is overcharged or discharged at high temperature. After charging is fully charged, it is theoretically designed to prevent charging. The user can only pay attention to the type of security in the process of use. What is important are internal factors such as battery quality and charging management. Before clarifying the reasons for the expansion of polymer lithium-ion batteries and the essentials for restraint, the author of Energy Storage will first talk about the structure of polymer lithium-ion batteries. The important structure of polymer lithium ion battery includes three elements: positive electrode, negative electrode and electrolyte. The so-called polymer lithium ion battery means that at least one or more of these three important structures use polymer materials as an important battery system. In the polymer lithium-ion battery system developed at present, the polymer material is mainly used in the positive electrode and the electrolyte. The positive electrode material includes conductive polymer or inorganic compounds recovered from general lithium-ion batteries. The electrolyte can use solid or colloidal polymer electrolytes, or organic electrolytes. General lithium-ion technologies use liquid or colloidal electrolytes. Robust secondary packaging to contain combustible active components, which adds weight, and other restrictions on size mobility. There is no excess electrolyte in the polymer lithium ion process, so it is more unchanged, and it is not easy to cause a dangerous environment due to battery overcharging, collision or other damage, and overuse. The thickness change brought about by lithium ion insertion. Lithium ions are extracted from the positive electrode and inserted into the negative electrode when the battery cell is charged, causing the gap between the negative electrode layers to increase and showing expansion. Generally speaking, the thicker the battery core, the greater the expansion; the expansion is caused by inadequate process control. In the manufacturing process, such as the separation of the slurry, the discreteness of the C/A ratio, and the temperature control city directly affect the expansion level of the battery. It is especially water, because the highly active lithium-carbon compound formed by charging is very sensitive to water, resulting in a violent chemical reaction. The gas presented by the reverberation causes the internal pressure of the cell to rise, which adds to the expansion of the cell. The flatulence bulge of polymer soft-packed lithium-ion battery is related to many factors such as the quality of the lithium-ion battery, the essentials of use, and the situation. 1. Poor packaging: Atmospheric moisture enters the inside of the cell during the construction process, causing the electrolyte to decompose and present gas. 2. The battery contains excessive water content: In the process, once the water content exceeds the standard, the electrolyte will fail and show gas. 3. Corrosion: Corrosion occurs in the polymer soft-packed lithium-ion battery core, the aluminum layer is consumed by the echo, and it loses its use as a barrier to water, resulting in flatulence. 4. Appearance damage: damaged by external force, puncture causes moisture to enter the inside of the cell. The chemical properties of other lithium materials are too vivid and bring extremely high risks. When exposed to the atmosphere, lithium metal exhibits a violent oxidative reaction with oxygen. 5. Knocking: Aluminum material is easy to deform, and it will be easily knocked. The larger the battery cell and the larger the air bag, the more likely it is to be damaged. 6. Short circuit: the positive and negative poles are fighting to cause a short circuit, and the polymer lithium battery cell produces gas or even smoke. 7. Internal short circuit: Shrinkage, curling, breakage, and burr piercing the insulation film of the polymer lithium ion battery insulation film cause internal disconnection, thereby bulging. 8. Overcharge and overdischarge: The polymer soft pack battery is overcharged or overdischarged, and the protective plate is abnormal, and the battery cell will produce serious bulging. Polymer Lithium Ion Battery Drum Management Step 1. If the mobile phone battery is already charged, use your fingers to find the open area of u200bu200bthe battery first, poke a small hole with the pointer, and let the atmosphere inside run out. 2. You can buy a new polymer lithium-ion battery pack from scratch to replace it. During the charging process, it is necessary to guard against overcharging, not only to protect the battery from damage, but also to save energy and protect the environment. Lithium-ion battery manufacturers must strictly control moisture, control the turnover process and the baking time and temperature. After the user invents the lithium-ion battery pack, it will inevitably curb the use of it, and the camera or video will be kept at the bottom, otherwise the product manufacturer will probably deny the account. You can report to the people around you, buy things to keep the bottom, and take evidence if the product is broken. The bulge of the polymer lithium ion battery is already a precursor to a major problem, and it is not recommended to use it again. If you continue to use it, it will cause unimaginable effects such as short-circuit, fever, smoke, and burning. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages and disadvantages of ternary lithium-ion batteries?