China's lithium battery technology breakthrough -Lithium - Ion Battery Equipment

China's lithium battery technology breakthrough is imminent -Lithium - Ion Battery Equipment

With the sharp increase in the sales of electric vehicles in China, there is a forecast report that the lithium ion power battery market is entering a golden period. By 2017, the scale of the power lithium battery industry will increase to the current 400%. With such leapfrog scale rise, battery quality has become an unavoidable technical point. Recently, Beijing issued a document to adjust the quality assurance of vehicles and power lithium batteries, in which the quality assurance of key parts such as power lithium batteries is not less than 5 years or 100000 kilometers, and the quality assurance is not less than 8 years or 120000 kilometers.

Shanghai, as a leading demonstration city for the promotion of new energy vehicles in China, is also considering improving the service life of power lithium batteries. According to the current quality assurance service standards of power lithium batteries of various automobile enterprises, power lithium batteries can generally operate for 5 years and 100000 kilometers. How to break through the technical bottleneck and extend the service life of the battery is a common issue for all battery production companies.

The bottleneck of electric vehicles lies in batteries. Only when the problem of battery power is solved, other problems can be solved. Under the current technical conditions, changing the charging mode of power lithium battery is a good choice to extend the battery life. Industry insiders pointed out that the 8-year warranty currently advertised is not necessarily achievable. Due to the difference of production process in the production process of automobile power lithium battery, there are also some differences in the performance of battery monomer in the battery pack. With the passage of time, the monomer difference in the battery pack will gradually expand, eventually affecting the performance of the battery, resulting in the rapid degradation of the battery performance. Different charging methods are important factors that affect the performance and service life of single lithium battery. Proper charging methods can not only maximize the battery capacity, but also extend the battery service life.

At present, electric vehicles are criticized for their long charging time and short range. For this reason, the high rate fast charging method has solved the problem of long charging time, but it has seriously affected the service life of lithium batteries. If you blindly pursue fast charging mode and charge at a large rate, it is easy to cause high temperature, overcharge and other abnormal conditions and even cause danger. The charging method of "soft first and then hard", under the voltage and current that the battery can withstand, and monitoring the environment, temperature and temperature difference, and actively maintaining the health of the battery, will help to extend the battery life and reduce the safety risk.

Charging mode is one of the ways to prolong battery life, but it is not the fundamental solution. The improvement of battery life and stability still needs technical breakthroughs. With regard to the current situation in China, in terms of production technology, China's battery companies lag behind the world level in terms of production and R&D capabilities. The output of new energy vehicles reached 76000, with a year-on-year increase of 2.5 times. There are a large number of gaps in the supporting power lithium battery of new energy vehicles, coupled with the low barriers in the power lithium battery industry, leading to a large number of battery companies with low technology content put into production, and finally resulting in a situation of excess production of low-end batteries in China and a gap in the high-end battery market. In addition, the energy density of batteries with low technology content is low, which affects the range of new energy vehicles. If we produce batteries with the same capacity, our battery weight will exceed that of Japanese and Korean enterprises, which will affect the lightweight development of new energy vehicles.

In addition, there is a lack of uniform production standards in the battery industry in China. The power lithium batteries produced by various battery companies are not universal enough to achieve standardized and large-scale production, which also increases the workload of battery design. Due to the lack of uniform industry standards, the charging and discharging performance of batteries produced by various companies is greatly different. The lack of standardization in the upstream directly leads to a large difference in charging piles, which also becomes one of the reasons for the difficulty of charging. A unified battery standard will help to standardize the battery industry, save human and material costs, and invest more resources in battery research and development and production process improvement.(Lithium - Ion Battery Equipment)



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