Currently, for electric vehicles, the biggest limiting factor is still the battery. And if the battery can solve the disadvantages of slow charging speed, short battery life, and degraded charge and discharge performance, the popularity of electric vehicles will also be greatly accelerated.
According to CCTV Finance and Economics, during the "13th Five-Year Plan" period, China's new energy vehicles have shown explosive growth. At the same time, China has also continued to send good news in the core technology of new energy batteries. The 80-year-old Chinese lithium battery first person Chen Liquan brought His team developed a new type of battery material.
Chen Liquan, an 80-year-old academician of the Chinese Academy of Engineering, is the founder of China’s lithium battery industry. In 1996, he led a scientific research team to develop lithium-ion batteries first in China, and took the lead in solving the scientific, technological and engineering problems of domestic lithium-ion battery mass production. Industrialization of domestic lithium-ion batteries.
In Liyang, Jiangsu, Li Hong, a protégé of Academician Chen Liquan, led the team to achieve a breakthrough in a key raw material for lithium batteries after more than 20 years of technical research, and mass production was carried out in 2017.
According to reports, the Institute of Physics of the Chinese Academy of Sciences has been studying nano-silicon since 1996. The nano-silicon anode material is a new material they independently researched and developed. The button battery made from it has 5 times the capacity of traditional graphite lithium batteries.
At the same time, the new solid-state battery developed by Professor Li Hong and the drone using this battery can increase the battery life by 20%. The secret lies in the solid-state cathode material of this battery.
In 2018, the design and development of a 300Wh/kg solid-state power battery system has been completed here. After being mounted on a vehicle, it can double the mileage of the vehicle. In May of this year, such solid-state batteries have begun to be used in consumer electronic products.
In addition, not only the Institute of Physics of the Chinese Academy of Sciences, but many companies are also exploring new energy battery technology and new materials. At Yinlong New Energy Energy Storage System Research Institute in Zhuhai, Guangdong, a pure electric bus is being charged.
According to the engineer, the bus equipped with lithium titanate batteries charged from 33% to more than 60% in three minutes. In just 8 minutes, the bus was fully charged and the battery level showed 99%.
Moreover, the bus line is fixed, and generally the number of kilometers for a round trip will not exceed 100 kilometers. By using the bus driver to rest in the neutral position, the advantage of fast charging of the lithium titanate battery can be fully utilized. Moreover, the operating temperature is wide, and it can still be charged and discharged normally in an environment of minus 50°C.
At the same time, the battery has a long cycle-discharge life. This research institute has a lithium titanate battery, which has been charging and discharging cycle tests since 2014. Now it has been six years, charging and discharging more than 30,000 times. The capacity is only reduced by less than 10%, and the performance is very excellent.
What is more noteworthy is that the thermal runaway protection performance of this battery is even more amazing. The technicians demonstrated the drop, acupuncture and cutting tests of the lithium titanate battery on site. Especially after the steel needle pierced the battery, there was no burning or smoking, and the battery could still be used normally.
However, although lithium titanate batteries have so many advantages, the energy density is not high enough, only about half of lithium batteries. Therefore, they divided the battery's target market into application scenarios that do not require high energy density, such as buses, special vehicles, and energy storage power stations.
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