Lithium iron phosphate batteries sometimes bulge, which is swelling or swelling. Do you know why lithium iron phosphate batteries swell up? Today, I will introduce it to you, so that you can avoid swelling the lithium iron phosphate battery!

1. Overcharging will cause the lithium battery to swell. Overcharging of the battery will cause the lithium molecules in the positive electrode material of the battery to completely enter the positive electrode material of the battery, resulting in the original round and square deformation and collapse of the positive electrode stage, which is the reduction of the capacity of the lithium iron phosphate battery. key reason. As the total number of lithium-ion batteries in the negative stage increases, the excessive deposition of lithium molecules causes them to grow into dendrites, thus making the lithium battery rise. Drums caused by power outages.

2. When the lithium liquid secondary battery is charged for the first time, the metal electrode and the lithium battery electrolyte react on the solid-state high-performance liquid phase, resulting in a passivation treatment layer, which covers the passivation treatment film on the surface of the metal electrode. It blocks the basis of the molecular structure in the electrolyte of lithium batteries, but lithium ions can be arbitrarily placed according to the passivation treatment layer and adsorbed by the resin, which has the characteristics of solid electrolyte. Therefore, this passivation treatment film is called SEI. SEI movies are not set in stone. There will be a small amount of transformation during the whole battery charging process, mainly the reversible transformation of some organic compounds, and the overcharge and discharge of the lithium iron phosphate battery will lead to the reversible ring breaking of the SEI plastic film.

3. It is related to the manufacturing level. The manufacturing level of lithium iron phosphate battery packs has unpacking conditions. The coating of lithium battery pack is uneven, and the production process is not smooth.

4. The lithium iron phosphate battery pack will swell even if it is not used for a long time. Since the gas conducts electricity to a certain extent, the charging and discharging time is too long, which is equivalent to the direct contact between the positive and negative electrodes of the battery, resulting in long-term short-circuit failure.

The above is the reason why the lithium iron phosphate battery swells up. In general, the lithium iron phosphate battery that is purchased is used in a standardized manner, and basically the lithium iron phosphate will not swell!