Is it better to use ternary lithium batteries or lithium iron phosphate batteries for solar street lights?

Is it better to use ternary lithium batteries or lithium iron phosphate batteries for solar street lights? 1. Advantages of ternary lithium battery: high energy density and better cycle performance than normal lithium cobalt oxide. Performance is less affected by temperature, low temperature resistance, and can be used in a low temperature environment of minus 15 degrees to 30 degrees. At present, with the continuous improvement of the formula and the perfect structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium cobalt oxide batteries. Disadvantages: The number of cycles is short, which is related to the short service life of the lithium iron phosphate battery. At the same time, the safety and stability are poor, and the high temperature is easy to analyze. When encountering the combustible electrolyte and carbon materials in the battery, it will be a little bit, and deflagration will occur. 2. Advantages of lithium iron phosphate battery: excellent charging and discharging performance, more cycles, longer service life, and good high temperature stability. Analysis will only start at 700-800℃, and when faced with impacts, needle sticks, short circuits, etc. No oxygen molecules are released, no violent combustion occurs, and the safety performance is high. Disadvantages: performance is greatly affected by temperature, especially in low temperature environments, the discharge capacity and capacity will be greatly reduced, and its energy density is low. Advantages of lithium iron phosphate batteries compared to ternary lithium batteries used in solar street lights ① Green and environmental protection: The entire battery processing process, the battery use process and the solution of the waste battery are free of harmful substances and do not pollute the environment. It conforms to North America, Strict environmental protection requirements in Europe; ②Safe and reliable: Compared with other materials of lithium batteries, lithium iron phosphate batteries have higher material safety and are the choice of electric vehicles and solar energy storage batteries; ③The discharge voltage of lithium iron phosphate batteries is stable during the discharge process. , Basically remain unchanged, only a little change when the discharge voltage is almost terminated, showing good discharge characteristics, cycle life can reach more than 2000 times, can be used for 7 to 8 years; ④ lithium iron phosphate battery is over-discharged There will be no leakage or damage in zero-voltage storage, and the capacity will not change much. After a few charge-discharge cycles, the capacity can be restored to the original value, which is not characteristic of other batteries. It can be compared from this that, of course, the use of lithium iron phosphate batteries in solar street lights is the best, but the price is relatively high. Lithium iron phosphate batteries are currently domestically developed energy storage batteries with mature and independent property rights. There are many processing manufacturers, and the conditions of use and safety protection are also perfect. Therefore, the use of lithium iron phosphate batteries is the best choice. Because ternary lithium materials have such potential safety hazards, manufacturers are also working hard to prevent accidents. Based on the easy pyrolysis characteristics of ternary lithium materials, manufacturers will put a lot of effort on overcharge protection, overdischarge protection, overtemperature protection, and overcurrent protection. Therefore, the spontaneous combustion incident should consider whether the manufacturer's functions in these links are in place. At present, the technology of ternary lithium battery in the use of solar street lights is quite mature. 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 it. Previous: Can polymer lithium batteries be delivered?