What are the advantages of lithium titanate batteries?
Lithium titanate battery is used in lithium ion battery anode materials for lithium titanate. With manganese acid lithium, ternary material of lithium iron phosphate compound 2.4 V or 1.9 V lithium ion secondary battery. In addition, also can be used as the anode and lithium metal or lithium alloy 1.5 V lithium secondary battery.
Lithium titanate (LTO) materials used as anode materials in the battery. Due to its own characteristics, materials and electrolyte in the process of charging and discharging cycle reaction easily interact and produce gas. Therefore, ordinary lithium titanate battery easily bilge gas, cause the batteries to bulge, the performance will be greatly reduced, so as to reduce the theory of the lithium titanate battery cycle life. Lithium titanate batteries, according to the test data in circulation around 1500-2000 will appear bilge gas, lead to can’t normal use, it is also the important reason of lithium titanate batteries large-scale application.
Lithium titanate (LTO) battery performance improvement is key to single material performance improvement and a variety of materials synthesis of organic integration. To the need of fast charging and long life, in addition to the anode materials, lithium ion battery of other key raw materials (including anode materials, membrane, electrolyte), combining with the engineering technology of special experience, finally formed a “bloating” lithium titanate LpTO battery products, for the first time realized the large-scale application in electric buses.
According to the test data in 6 c under the condition of charging, 6 c discharge, 100% DOD, lithium titanate LpTO monomer battery cycle life over 25000 times, the residual capacity of more than 80%, the battery produce flatulence is not obvious and does not affect its service life; And the practical application of chongqing quick charge pure electric bus also showed that the battery assembly, after the completion of the electrical performance is also quite good, can guarantee pure electric bus daily business operations.
Advantages of lithium titanate batteries
1.Good Security and stability
Traditional carbon electrode, once the intercalated-li overcharge, metallic lithium is easily precipitate in the electrode surface, contact with the electrolyte reacts to generate combustible gas, safe hidden trouble. The potential of lithium titanate is higher than that of pure metal lithium, not easy to produce lithium crystal, stable discharge voltage, improves the safety performance of lithium-ion batteries. Had a third party testing lithium titanate battery, found in acupuncture, extrusion, such as short circuit under the strict test, no smoke, no fire, no explosion, security is much higher than other lithium batteries. As a result, a lot of the personage inside course of study thinks, lithium titanate is very suitable for use in a special field of very demanding on the stability of the battery.
The safety and stability performance of electric vehicles is the most important indicator of consumer. No matter how far range, if the security problem is not solved, the consumers just open untimely cars, titanate and the super safety performance of lithium-ion batteries will no doubt be favored by consumers.
2.Excellent quick charging performance
Compared with the carbon anode materials, lithium titanium oxide batteries has higher lithium ion diffusion coefficient, high rate charge and discharge. While greatly shorten the charging time, small impact on the cycle life, thermal stability and strong. After the test, using the latest technology research and development of titanium acid lithium batteries can be charged in ten minutes or so, is a traditional qualitative leap of the battery.
Too long charging time is hard to overcome obstacles in the electric vehicle development. General use slow filling pure electric bus, charging time for at least 4 hours, a lot of pure electric bus charging time for eight hours. Quick charge is the future trend of electric vehicle and consumers don’t want to waste too much time waiting for charging.
3. Long cycle life
Cell cycle life determines the price of new energy cars, are the future of new energy vehicles from the main point of competition after the subsidy policy. The extension of car battery cycle life, let the consumer can afford.
Other traditional lithium-ion batteries, such as batteries, lithium iron phosphate capacity attenuation in the process of using, obviously shorten the life, not only affect the normal use of the user, also increase the cost of the replacement battery. This kind of bad user experience is likely to let the consumer to electric cars, is not conducive to the sustainable development of new energy automotive industry. Lithium titanate battery good solve these problems.
During charging and discharging lithium titanium oxide battery, lithium ions embedded and embedded off will not cause the change of lithium titanate crystal structure, so the structure of lithium titanate material had little influence. Because of this, lithium titanate is also called “zero strain material”. 5 years, with the current “slow filling fast charge for 2 years” compared to the lithium iron phosphate batteries, lithium titanate battery advantage is very outstanding. According to the test data, the ordinary battery cycle life to an average of 3000 times, and lithium titanate battery is full charge and discharge cycles of up to 30000 times more. Used as a power battery 10 years later, can be used as energy storage battery reuse for 20 years. This also means that lithium titaium oxide battery can achieve the same as the vehicle’s life cycle, users don’t need to replace the battery in the practical use, almost no increase in subsequent costs.
4. Good temperature resistance
Lithium titanate battery spinel structure with three-dimensional lithium ion diffusion channels, so the lithium titanate battery have excellent performance in the high and low temperature performance. General electric cars in the – 10 ℃ to charge and discharge will appear problem. Lithium titanate battery has good wide temperature tolerance and strong durability. Whether it is frozen in the ice, they are all can be in negative 50℃ to negative 60℃temperature normal charging and discharging. No matter in the north, or on a hot south, vehicles are not affected by the battery “shock”, from the user’s worries.
Lithium titanate batteries these advantages can greatly save charging station construction and personnel costs, more suitable for popularization and application in the field of public transport, the popularization and application of the public transport system is “main”. China’s new energy bus. New energy vehicles currently promoting the highest percentage of passenger cars, according to market feedback quick charge mode is more suitable for the actual demand of the passenger car market. Experience is relevant principals: “a car can be charged, 6-10 minutes drivers can take a break from work, can make up.”
Lithium titanium oxide battery as the anode, and the use of mainstream graphite as the cathode of lithium battery, compared to its share of the market is very small. Data show that in the new energy bus, lithium titanium oxide battery market share of about 3%, far below the lithium iron phosphate battery market share of 88%; And in the field of passenger cars, titanium acid lithium batteries and other minority technology, jointly occupies 3% of the market space.