Comparison of important differences between lithium titanate battery and lithium iron phosphate battery pack

Lithium titanate battery: Lithium titanate battery is a kind of lithium titanate used as the negative electrode material of lithium battery. It can be combined with lithium manganate, ternary material or lithium iron phosphate to form a 2.4V or 1.9V lithium ion secondary battery. In addition, it can also be used as a positive electrode to form a 1.5V lithium secondary battery with metallic lithium or lithium alloy negative electrode. Ordinary lithium titanate batteries are prone to flatulence, leading to swelling of the battery core, and a significant decrease in electrical performance, which greatly reduces the theoretical cycle life of the lithium titanate battery. Advantages of lithium titanate battery 1. Good safety and stability. The potential of lithium titanate is higher than that of pure metal lithium. Lithium crystal branches are not easy to appear, and the discharge voltage is stable. Moreover, the safety performance of the lithium battery is improved. Lithium titanate batteries are tested and found that they will not smoke, fire, or explode under rigorous tests such as acupuncture, squeeze, and short circuit. The safety is much higher than other lithium batteries. 2. Excellent fast charge performance Compared with carbon anode materials, lithium titanate batteries have a higher lithium ion diffusion coefficient and can be charged and discharged at a high rate. While greatly shortening the charging time, the impact on the cycle life is small, and the thermal stability is also strong. The lithium titanate battery can be fully charged in about ten minutes. 3. Long cycle life The number of complete charging and discharging cycles of lithium titanate batteries can reach more than 30,000 times. After being used as a power lithium ion battery for 10 years, it may be used as an energy storage battery for another 20 years. The user does not need to replace the battery in actual use, and there is almost no additional cost in the later period. 4. Good wide temperature resistance. General electric vehicles will have problems when charging and discharging at minus 10℃. Lithium titanate batteries have good wide temperature resistance and strong durability. They can be charged and discharged normally at minus 50℃ to above 60℃. , Whether in the frozen north country or in the hot south, the vehicle will not affect the work due to battery shock, eliminating the user's worries. To sum up the advantages of lithium titanate batteries, it can greatly save the cost of charging station site construction and staffing, and it is more suitable for popularization and application in the field of public transportation. Disadvantages of lithium titanate batteries: Lithium titanate batteries use lithium titanate as the negative electrode. Compared with mainstream lithium batteries that use graphite for the negative electrode, the market share is very small. The energy density is low and the cost is high. In particular, the low energy density is due to the principle and performance of the anode material lithium titanate, and it is difficult to have a big breakthrough. As for the claimed long service life of lithium titanate batteries, it is even more difficult to be certified. The battery life is also affected by the combination of cathode material, electrolyte, separator, and operating temperature. Lithium iron phosphate battery pack: Lithium iron phosphate battery pack refers to a lithium battery that uses lithium iron phosphate as the positive electrode material. Its characteristics are that it does not contain precious elements such as cobalt, the price of raw materials is low, and the content of phosphorus and iron are abundant in the earth, so there will be no supply problems. Its working voltage is moderate (3.2V), large capacity per unit weight (170mAh/g), high discharge power, fast charging and long cycle life, and high stability in high temperature and high heat environment. Advantages of lithium iron phosphate battery pack: small size, light weight, the volume of the lithium battery pack is 2/3 of the volume of the lead-acid battery, and the weight is light, only 1/3 to 1/4 of the lead-acid battery. The cycle life is long. The cycle life of a lithium iron phosphate battery pack is 1200 to 2000 times, but that of a traditional lead-acid battery is only 500 to 900 times. The charging and discharging characteristics are good, the charging and discharging electric energy conversion efficiency of the lithium battery pack can be greater than 97%, and the charging and discharging electric energy conversion efficiency of the lead-acid battery is about 80%. Safe and environmentally friendly, the lithium iron phosphate material does not contain any heavy metals and rare metals, is non-toxic, and has no pollution during processing and use. It complies with European RoHS regulations and is a green lithium battery. In puncture, squeeze, overcharge, short circuit and other experiments, it will not explode or catch fire. Without memory effect, the battery can be charged and discharged at any time. The operating temperature range is wide, and the thermal peak of the lithium iron phosphate battery pack can reach 350℃-500℃, while the lead-acid battery is only around 200℃. Disadvantages of lithium iron phosphate battery packs: Lithium iron phosphate batteries have some performance defects, such as low tap density and compaction density, resulting in low energy density of lithium batteries; material preparation costs and battery manufacturing costs are high, Low battery yield and poor consistency; poor product consistency; intellectual property issues. 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: Analysis of lithium battery types and applications of lithium batteries