Developments in the field of solid lithium batteries

Industry insiders say solid-state batteries have longer range because of their higher energy density. With the improvement of the comprehensive technical indexes such as circulating property and safety, the market for solid-state battery applications will gradually expand.

Various advantages

The company said it was conducting extensive testing of solid-state batteries, setting up a research and development center and a test production line in Ningbo to speed up the commercialization of solid-state lithium battery technology. At present, the company's solid lithium battery is still in the experimental stage, but has passed a number of third-party safety tests.

On March 18, the first-phase project of a single large-capacity solid polymer powered lithium ion battery invested and built by Fujian Provincial Bidding and Procurement Group was officially put into operation. This type of power lithium-ion battery has recently passed the authoritative test. The 10.5 M pure electric bus carrying the powered lithium-ion battery pack was tested last month and can operate safely for more than 410 km on a single charge.

Power batteries are the key core components of new energy vehicles. According to the requirements of the "Roadmap for Energy Conservation and New Energy Vehicle Technology", by 2020, the energy density target for pure electric vehicle power cells is 300 Wh/kg, 400 Wh/kg in 2025, and 500 Wh/kg in 2030.

Compared with liquid lithium ion batteries, solid state lithium batteries have the advantages of good safety performance, high energy density and long cycle life. Chen Liquan, an academician of the Chinese Academy of Engineering, said earlier that "the energy density should be further improved. It is now necessary to consider all-solid-state lithium batteries. The long-term development of the electric vehicle industry requires technical reserves, and all-solid-state lithium batteries are expected to become the leading technology route for the next generation of power batteries for vehicles. "

Active layout of listed companies

Looking at the current situation, BYD, Zhongtian Technology and other companies have launched a layout in the solid lithium battery field.

In December 2017, Yanfeng Lithium announced that it plans to invest in the first-generation solid-state lithium battery R&D pilot production line with no more than 250 million yuan. According to the plan, in December 2018, the first-generation solid-state lithium battery production line of the billion-watt class was delivered; in December 2019, it sold 300 million yuan, and the second-generation solid-state lithium battery technology was mature.

In November 2017, Yicheng Xinneng announced that it plans to acquire 70% of Henan Pingmei Guoneng from 70 million yuan and cut into the manufacturing process of lithium batteries. The total investment of 10GWh high-power lithium-ion battery project of Pingmei National Power is 5 billion yuan.

The industry believes that solid-state batteries are expected to solve the problem of low energy density and improve the safety of batteries. It is expected that all-solid lithium secondary batteries will enter the terminal market in 2020. With the improvement of the comprehensive technical indexes such as cyclicity, doubling rate, high low temperature and safety, the application of solid-state batteries in the electric vehicle market will gradually expand.

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