Ways to improve the low temperature characteristics of lithium iron phosphate batteries

Factors affecting the low-temperature characteristics of lithium iron phosphate batteries Although lithium iron phosphate batteries have many advantages over other rechargeable batteries in terms of the service life and time of the circulatory system, their performance is worse at low temperatures. Therefore, it is more reasonable to improve the low-temperature performance of lithium iron phosphate batteries. 1. Positive electrode. The charge electrode material of lithium iron phosphate battery has relatively weak electrical conductivity of electronic devices, which can easily cause polarization and reduce lithium capacitance. 2. Negative electrode. The negative potential of lithium batteries is very harmful to ultra-low temperature batteries and seriously endangers the safety of rechargeable batteries. 3. Lithium battery electrolyte. In the ultra-low temperature natural environment, the viscosity of the lithium battery electrolyte in the rechargeable battery increases, which improves the characteristic impedance of the lithium battery. Ways to improve the low-temperature characteristics of lithium iron phosphate batteries 1. Positive electrode. The grain size, resistance, and plan view axis size all adversely affect the ultra-low temperature characteristics of lithium batteries. From the production process, the ultra-low temperature charge and discharge characteristics of lithium ions are improved. Adding the length of the floor plan can add a safe passage for lithium batteries, which helps to add multiples of rechargeable batteries. The ultra-low temperature charging and discharging of Lifepo4 batteries with different particle diameters have better ultra-low temperature charging and discharging effects at 20℃ and 20℃. 2. Negative electrode. Regarding the ultra-low temperature lithium iron phosphorus battery rechargeable battery, the hazard factor is a negative value, which depends on the magnitude of the negative value and the range of the negative value. Different interlayer spacing and particle size of battery cathode materials-synthetic high-purity graphite, high-purity graphite with large embedded particles, from the perspective of antigen, its own resistance characteristics and positive ion transfer characteristics are relatively small. With the addition of high-purity graphite spacing and the reduction of grain size, lithium phosphate batteries that use constant current power batteries to charge at ultra-low temperatures have been greatly improved. 3. Lithium battery electrolyte. At a temperature of minus 20 degrees Celsius or even lower, the lithium iron phosphate battery in the lithium battery electrolyte is prone to freezing and swelling, resulting in deterioration of characteristics. The test results stated that the harm of organic solvents to the ultra-low temperature of rechargeable batteries is between 70% and 90%, up to 10 points. Different lithium salts also have adverse effects on the charging characteristics of ultra-low temperature rechargeable batteries. In the case of only changing the preservative, the test found that the ultra-low temperature preservative can increase the charge and discharge capacity of the battery from 85% to 90%. Based on the composition of the internal material layer of the rechargeable battery, methods and key points are proposed to improve and improve the ultra-low temperature characteristics of lithium iron phosphate batteries. In fact, in order to improve the characteristics of rechargeable batteries at ultra-low temperature, not only the internal raw material composition of the battery is improved, but also the improvement of the intelligent management system of the rechargeable battery and the general circulation system can be more effective. 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 article: Why is the lithium battery not fully charged?