5-minute fast charge, tens of thousands of times of life, has the "spring" of 18650 battery arrived?

　　After years of development in the new energy vehicle market, ternary batteries with higher energy density have gradually gained the upper hand, while 18650 battery with lower energy density have gradually been marginalized by the market.

　　After years of development in the new energy vehicle market, ternary batteries with higher energy density have gradually gained the upper hand, while 18650 battery with lower energy density have gradually been marginalized by the market. The continuous decline of 18650 battery in the power lithium battery market is traced back to the direct application of lithium titanate batteries, which do not have an advantage in energy density, to long-range passenger cars. This application error The configuration has also caused its unparalleled advantages in fast charging, lifespan, safety, etc. to become useless. Confucius emphasized teaching students in accordance with their aptitude in scholarship, and 18650 battery also need to exploit their strengths, avoid weaknesses, and compete in differentiated competition.

　　CITIC Guoan MGL Power Technology Co., Ltd. (hereinafter referred to as MGL Power Company) has been committed to the development and application of 18650 battery for more than ten years. It has profound accumulation of lithium titanate technology and rich battery cell manufacturing and product applications. experience. In this season of recovery of all things, let’s follow MGL’s footsteps to hear where the spring of 18650 battery is?

　　1. Advantages of lithium titanate batteries

　　Extra long life

　　Lithium titanate is a zero-strain material whose volume deformation is less than 1% during charging and discharging, giving the full battery excellent cycle performance and service life. MGL Power Company's lithium titanate battery products have a lifespan of up to 10,000 times when cycled to 80% of the initial capacity under the working conditions of 25℃-100%DOD. Therefore, although the current manufacturing cost of 18650 battery is higher than that of graphite-based batteries, its superior durability will greatly reduce battery maintenance and replacement costs during long-term use.

　　Super fast charging

　　Unlike lithium-ion batteries with two-dimensional lithium ion transmission channels in traditional carbon anode materials, lithium titanate materials have a spinel structure and have three-dimensional fast lithium ion transmission channels. MGL Power Company uses nano-lithium titanate technology. The battery can be charged within minutes and can be charged and discharged even under extremely cold conditions (-30℃--40℃), greatly improving user convenience. This characteristic makes lithium titanate uniquely advantageous in areas such as fast-charging buses and buses that have large spaces, short ranges, and high operating frequencies. When charging networks achieve large-area coverage in the future, people's requirements for energy density will gradually fade, and the ultimate user experience will become an important driving force for customer choice.

　　Ultra-high security

　　The lithium insertion potential of lithium titanate negative electrode is about 1.55V (vs. Li+/Li), which is much higher than the reduction potential of metallic lithium. Even if it is quickly charged under low temperature conditions, it is difficult to precipitate lithium dendrites, ensuring that lithium titanate ion batteries can be used in a wide range of applications. Safety of use within the temperature working range. In addition, the lithium titanate material itself has extremely low conductivity. When acupuncture occurs in the battery, the acupuncture point is instantly discharged and insulated, achieving separation from other parts of the electrode and effective control of the failure range. Even under extreme abuse, lithium titanate's own non-flammability and lower failure reaction heat release than graphite anodes will greatly reduce its failure risk and the degree of danger after failure. Therefore, in fields such as rail transit, electric buses, and electric ships that have extremely strict safety performance requirements, 18650 battery have the unique advantage of ultra-high safety compared to graphite anode batteries. All models of lithium titanate battery products of MGL Power Company have passed the national standard safety test project (GB/T31485).

　　MGL Power Company has been deeply engaged in the development of 18650 battery for thirteen years, and has conducted technical research on many key issues in the manufacturing and application process of lithium titanate batteries. Solve the dispersion problem of nano-lithium titanate materials through the development of new mixing processes to ensure good processing performance and uniformity of electrode production;

　　MGL Power Company has launched three generations of typical battery products: power type 8.5Ah, energy power type 25Ah and energy type VDA40Ah. Among them, the power type 8.5Ah battery cell has a power density of up to 2900W/kg (50% SOC), and has ultra-high rate characteristics of 12C charging and 25C discharge; the energy power type 25Ah battery cell maintains high power and large rate characteristics, Its mass energy density is about 21.3% higher than the power type 8.5Ah battery cell; the energy type VDA40Ah battery cell can achieve an energy density of 110Wh/kg through lightweight structural design and electrode formula optimization. This energy density is the highest among domestic and foreign lithium titanate batteries. Leading ion battery manufacturers.

　　2. Application cases of lithium titanate lithium-ion battery manufacturers

　　MGL Power Company has formed good long-term relationships with many high-quality customers in the field of fast-charging buses and rail transit such as Beijing Public Transport Group, Youth Bus Group, CRRC Changchun Bus Co., Ltd., CRRC Sifang Co., Ltd., Shenzhou High-speed Railway, etc. for its lithium titanate battery products. The cooperative relationship, product electrical performance, safety performance and durability and reliability performance have been widely recognized by customers.

　　At present, power-type 8.5Ah batteries are mainly used in the field of fast-charging buses. In 2014, they achieved their first industrial application and were used in batches on trackless buses of Beijing Public Transport No. 102.

　　Up to now, it has been running for more than 4 years without any battery safety failure, and there has been no obvious capacity and power attenuation when it is regularly returned to the factory for maintenance and calibration;

　　Energy power type 25Ah and energy type VDA40Ah batteries are customized products developed in the rail transit field. The company has successively supplied multiple sets of energy storage systems for the Changzhou Tram Project, Delingha Tram Project and Fuxing Standard EMU.

　　Among them, the Delingha tram equipped with energy-power 25Ah batteries runs on the Qinghai-Tibet Plateau and is currently the highest-altitude tram route. Operation feedback results show that MGL powered lithium titanate products can withstand high cold and low air pressure. The harsh environmental test; the Fuxing EMU loaded with energy-type VDA40Ah underwent a complete vehicle test in April 2018. This is the first time that my country's standard EMU is powered by lithium titanate batteries, and it is also a positive test for MGL Power Company's lithium titanate battery products. Highly recognized safety.

　　3.Conclusion

　　In addition to the continuous transformation of traditional passenger cars, commercial vehicles, and buses, rail transit, ships, aircraft and other fields are also gradually joining the new energy industry. The future will be an era of new battery technologies and intelligent platforms. Although lithium titanate ion batteries do not have an advantage in energy density, with their unparalleled advantages in fast charging, safety and lifespan, through differentiated competition, they can be used in applications that require high charging speed and frequency. Winning a place in the field, MGL Power Company will continue to deepen the development of lithium titanate fast-charging battery technology, continue to explore its performance limits and application potential, and bring customers a more superior and convenient use experience.

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