What are the effects of low-temperature lithium battery packs on batteries?

The impact of low-temperature lithium battery packs on the battery: Among all environmental factors, temperature has the greatest impact on the charge and discharge performance of the battery. At low temperatures, the viscosity of the electrolyte decreases. As the conductivity decreases, the activity of the active material also decreases. The concentration difference of the electrolyte will become larger, the polarization will be strengthened, and the charging will be terminated early. More importantly, the diffusion rate of lithium ions in the carbon anode will be slower. Lithium is easily precipitated. As the temperature drops, the reaction rate of the electrode also drops. Assuming that the battery voltage remains constant and the discharge current decreases, the power output of the battery will also decrease. The low-temperature performance of lithium iron phosphate battery packs is slightly worse than that of batteries of other technical systems. Low temperature has effects 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 it is prone to polarization in a low temperature environment, thereby reducing the battery capacity. The same is the lithium battery, the low temperature performance of the lithium titanate battery is more excellent. The lithium titanate anode material with spinel structure has a lithium insertion potential of about 1.5V, does not form lithium dendrites, and the volumetric strain is less than 1% during charge and discharge. The nanometerized lithium titanate battery can be charged and discharged with high current, which realizes low-temperature fast charging while ensuring the durability and safety of the battery. 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: How to achieve full lithium battery for electric vehicle lead-acid batteries?