What are the characteristics of low-temperature lithium-ion batteries produced by lithium-ion battery manufacturers

The low temperature environment will have a certain impact on the performance of the lithium ion battery. Low temperature lithium ion battery is a special battery specially developed for the low temperature defects inherent in the performance of chemical power sources. From the low temperature perspective, it can be divided into three types: low temperature batteries for civilian use, special low temperature batteries, and low temperature batteries for extreme environments. Commercial and civilian low-temperature lithium-ion batteries have better performance than low-temperature polymer lithium-ion batteries with lithium cobalt oxide formula lithium-ion batteries. Many lithium-ion battery manufacturers have developed their own proprietary battery formulas after years of research and development. Special low-temperature lithium-ion batteries are a requirement for temperature. It is important for the low temperature environment of minus 40°C. The battery is required to discharge at 0.2C to reach more than 80% of the rated capacity. The main feature is that it has sufficient capacity and can work normally at low temperatures. Under normal circumstances, low-temperature lithium-ion batteries must have the following performance advantages; 1) Low-temperature discharge performance: discharge at 0.2C at -50°C, and the efficiency can reach more than 60%; at -40°C, discharge at 0.2C , The discharge can reach 80%; 2) Operating temperature range: -50°C to 50°C; 3) Low temperature cycle performance: charge and discharge at 0.5C at -30°C, and the capacity remains above 85% after 300 cycles ; 4) Safety performance: UL/CE/UN certification is required; 5) Suitable for mass production: battery consistency is good; 6) High-rate discharge performance: large current can be generated at -50°C; 7) Suitable for various Environmental conditions: It can be applied to special equipment and military equipment in cold climates; why are conventional lithium-ion batteries not suitable for working in low temperature environments? 1: 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 increase, the polarization will be enhanced, and the charging of the lithium ion battery will be terminated early. Lithium iron phosphate has a fatal disadvantage. The low-temperature performance of lithium iron phosphate batteries is slightly worse than that of batteries of other technical systems. Low temperature has an impact on the positive and negative electrodes of lithium iron phosphate, electrolyte and binder. 2: At low temperatures, the activity of the cathode material decreases, which reduces the number of lithium ions that can move to bring about the discharge current, which is the root cause of the decrease in capacity. 3: The performance of lithium-ion batteries is severely degraded at low temperatures, and some side reactions occur during the charging and discharging of lithium-ion batteries. The most important of these side reactions is the irreversible reaction between lithium ions and the electrolyte, which will cause the capacity of the lithium ion battery to decline and further deteriorate the battery performance. Summary: Low-temperature lithium batteries are currently widely used in the military industry. Low-temperature lithium batteries are also used in outdoor exploration and some special equipment. Finally, conventional lithium-ion batteries cannot be used in low-temperature environments. Special low-temperature performance must be used. Lithium Ion 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: The standard model of new energy and energy storage bundles promotes the sustainable development of lithium-ion batteries