How long is the life of lithium titanate battery

First of all, lithium titanate batteries have a longer service life. During the charging and discharging process, the intercalation and deintercalation of lithium ions have almost no effect on the structure of the lithium titanate material. This phenomenon is called a zero-strain material. This feature greatly improves the electrode performance and reduces the significant attenuation of the battery's specific capacity, thereby prolonging the battery life. According to research data, the remaining battery capacity of the lithium titanate battery is still more than 80% after 25,000 cycles of charging and discharging, which is much higher than the current ternary battery and lithium iron phosphate battery. Secondly, the safety of lithium titanate batteries is higher, and the performance is more stable in low temperature environments. Due to the chemical properties of the material, it is difficult for lithium titanate to form lithium crystals on the surface of the lithium titanate within the normal voltage range, which prevents the lithium crystals from causing short circuits inside the battery. This reduces the risk of battery thermal runaway, and allows lithium titanate batteries to have better high temperature resistance properties and will not easily explode. At the same time, this type of battery also has better performance in low temperature environments. Even in an environment of minus 40 degrees Celsius, lithium titanate batteries can release more than 60% of their capacity. Finally, lithium titanate batteries charge and discharge faster. The chemical diffusion coefficient of this material is one order of magnitude higher than that of the carbon anode, so it has faster and more cycle charge and discharge capabilities. Today's Yinlong new energy buses can overflow with more than 90% of the capacity within 5 minutes after being connected to a high-current fast-charging charging pile. Energy density and operating costs have become the biggest shortcomings. Although lithium titanate has distinct advantages over other anode materials, its shortcomings are also very prominent. Chen Qingquan, an academician of the Chinese Academy of Engineering and an academician of the Royal Academy of Engineering, once pointed out that the low energy density and high cost of lithium titanate are its most fatal shortcomings. From the material structure, the specific capacity of lithium titanate is only 170mAh/g, which is much lower than the 300mAh/g of graphite anode. Therefore, a new energy vehicle equipped with a power lithium-ion battery of the same quality, using lithium titanate as the negative electrode, has only about half of the driving range of another vehicle. The price factor has also become a barrier to the large-scale application of lithium titanate batteries. Compared with the price of graphite material of 20,000 to 60,000 yuan per ton, the price of lithium titanate is as high as 130,000 to 150,000 yuan per ton. Therefore, the current lithium titanate battery can only be used in buses with higher prices. In fact, Yinlong New Energy’s current main models are commercial buses over 6 meters. However, from the perspective of business operations, the operating cost of Yinlong New Energy's products is much higher than that of new energy buses equipped with ternary batteries or lithium iron phosphate batteries. Zhang Ming (pseudonym), an expert in energy research in the State Grid, told Eou Auto that the current key profit point of new energy buses is to use the peak-to-valley power difference to charge the vehicles, and this is the use of lithium titanate batteries as energy sources. The new energy bus cannot be realized. The average mileage of ordinary electric buses in first- and second-tier cities will be about 200 kilometers per day, and most of the new energy buses can meet this requirement. Zhang Ming said, but in order to reduce the factory price as much as possible, Yinlong New Energy's products will reduce the power lithium-ion battery carrying and reduce the driving range. In his view, although Yinlong New Energy's buses can use the driver's rest time to quickly charge, but this also prevents the fleet from enjoying the advantages of peak and valley electricity prices. The electricity price difference between day and night is basically around 50 cents, which is a considerable cost for a bus company with economies of scale. 25,000 cycles life: the skill of slaying dragons? In the past many publicity activities, the battery cycle life of lithium titanate batteries as high as 25,000 times is considered to be Yinlong's most deadly killer. Dong Mingzhu said on more than one occasion that the ultra-high cycle times can allow car owners to use Yinlong's car with peace of mind until it is scrapped. However, this kind of performance is suspected to be an over-design in the use of new energy buses. Assuming that Yinlong New Energy’s buses charge and discharge up to 4 times a day, the number of battery cycles in a year has just reached 1,300, and the cycle life of 25,000 cycles is sufficient for 20 years. At present, the replacement cycle of buses is about 6-8 years. The lithium titanate battery of a Yinlong new energy bus cannot be used up during the entire vehicle life cycle and can only be solved after the vehicle is scrapped. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.