What are the effects of low temperature on lithium iron phosphate batteries and lithium titanate batteries

The impact of low temperature on lithium iron phosphate batteries At present, lithium iron phosphate batteries are the most commonly used batteries in electric vehicles. This kind of battery is safe and has a longer cell life. However, lithium iron phosphate has a fatal defect. The low temperature function is slightly worse than the batteries of other technical systems. Low temperature has an impact on the positive and negative electrodes, electrolyte and binder of lithium iron phosphate. For example, the lithium iron phosphate positive electrode itself has relatively poor electronic conductivity, and polarization will simply occur in low temperature environments, and then the battery capacity will be reduced; affected by the low temperature, the speed of graphite lithium insertion will decrease, simply separating metal lithium on the surface of the negative electrode, if it is left for time after charging If it is lacking and put into use, the metal lithium cannot be fully embedded in the graphite again, and some metal lithium continues to exist on the surface of the negative electrode, which is very likely to form lithium dendrites, which affects battery safety; at low temperatures, the viscosity of the electrolyte will increase, and the lithium ion migration resistance will also be increased. Will increase accordingly; in addition, in the processing technology of lithium iron phosphate, the adhesive is also a very critical element, and low temperature will also have a greater impact on the function of the adhesive. The impact of low temperature on lithium titanate batteries is the same as that of lithium batteries, and the low temperature resistance of lithium titanate batteries is more excellent. The lithium titanate anode material with spinel structure has a lithium intercalation potential of about 1.5V, does not form lithium dendrites, and the volumetric strain is less than 1% during the charge and discharge process. The nano-sized lithium titanate battery can be charged and discharged at a high current, which completes the low-temperature fast charge while ensuring the durability and safety of the battery. For example, Yinlong New Energy, which focuses on lithium titanate batteries, its products have the ability to charge and discharge normally at -50-60°C. Lithium titanate battery has the advantages of materials. It can still complete fast charging at low temperatures. This kind of willfulness is difficult to learn from other materials batteries. 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: Is the rechargeable battery in the best condition?