Improvement of safety function of lithium iron phosphate battery

The P-O bond in the lithium iron phosphate crystal is stable and not easy to be destroyed. Even in the case of high temperature or overcharge, the structure of the lithium iron phosphate crystal will not sink and generate heat, nor will it form strong oxidizing substances like lithium cobalt. According to reports, a small number of samples were incinerated in the needle or short circuit test, but there were no reports of explosions. In the overcharge test, a high-voltage cartridge with several times the discharge voltage was used, and the blasting effect was good. But compared with ordinary electrolyte lithium-cobalt batteries, its overcharge safety has been greatly improved. An improved lithium iron phosphate battery for daily use is a lithium battery with lithium iron phosphate as the negative electrode material. The cycle life of long-life lead-acid batteries is about 350 times, up to 600 times. The cycle life of lithium iron phosphate power lithium ion battery exceeds 2500 times, and it can be used 2000 times with standard charging (4 hours charging rate). Lead-acid batteries of the same quality have new, old, maintenance, and maintenance years. The maximum maintenance time is 1.5-2 years. Under the same conditions, the theoretical life of lithium iron phosphate batteries can reach 8.5-9 years. In summary, the functional price is 5 times the theoretical lead-acid battery. High current discharge can quickly charge and discharge 3C. With a dedicated charger, 1.5c can charge the battery within 45 minutes and adjust the current to 2C, while lead-acid batteries cannot. Therefore, the sintering technology of lithium iron phosphate is the most important. The peak temperature of lithium iron phosphate for high temperature applications can reach 360,500°C, while the peak temperature of lithium manganese oxide and lithium cobalt oxide is only about 250°C. The operating temperature is wide (-20c-75c), and the peak value of high-temperature-resistant lithium iron phosphate can reach 350c~500c, while the peak value of lithium manganese and lithium cobalt is only 200c. Therefore, it is more reasonable to choose modified lithium manganate as the cathode material of lithium batteries. 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 article: How to solve the contradiction between the performance and cost of lithium battery materials?