Why does lithium iron phosphate battery short-circuit

Lithium iron phosphate battery short circuit means that the positive and negative poles of the battery are connected in an abnormal path with wires, which will cause serious damage to the battery and burn, which may cause a fire, or the battery container may explode due to excessive pressure. The short circuit of the lithium iron phosphate battery causes the positive and negative electrodes of the battery to contact, and the reason is more complicated. ①There are burrs on the surface of the electrode during the manufacturing process, which pierced the diaphragm and caused a short circuit of the positive and negative electrodes, or caused by improper manufacturing process; ②The short circuit caused by the overheating of the lithium battery during the use process and the melting of the diaphragm. The micro short circuit is mainly caused by the burr of the battery plate, and the large current discharge can sometimes be eliminated. The micro short circuit caused insufficient voltage. In the process of using lithium metal batteries, because the crystallization of metal lithium forms dendritic crystals, it is easy to cause micro short circuits and severely cause large short circuits. The low temperature can also easily cause the micro short circuit of the lithium battery. ③The quality of the diaphragm is poor. The quality of the diaphragm of the lithium battery cell is not up to the standard, and the lithium battery pack is often charged and discharged with high current during use. The diaphragm cannot withstand the huge flow of lithium ions in a short period of time. The battery core heats up violently, causing damage. ④If the temperature in the lithium iron phosphate battery rises slowly, the outer casing will gradually melt, and the protective layer will not serve the purpose of protection, resulting in the leakage of corrosive electrolyte. Then it will cause the battery to short circuit. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Why is UPS battery repair invalid