New Energy Vehicle Battery Technology Chain and Industrial Chain Development

On June 3, 2015, under the guidance of the National Energy Administration, the "Energy Storage International Summit 2015" hosted by the Zhongguancun Energy Storage Industry Technology Alliance(CNESA) and Dusseldorf Exhibition(Shanghai) Co., Ltd. was held in Beijing. At the forum on new energy vehicles and energy storage, Huang Xuejie, a researcher at the Institute of Physics of the Chinese Academy of Sciences, delivered a keynote speech on "The Development of New Energy Vehicle Battery Technology Chain and Industrial Chain". The following is the speech content.

Huang xuejie, Research Fellow, Institute of Physics, Chinese Academy of Sciences:

Why do you care about batteries? Because batteries are closely related to energy storage. For new energy sources, good batteries are needed; Good batteries are also needed for clean energy. Because batteries can make clean energy and clean transportation a reality.

Batteries have gone through a long process of development from acidic to alkaline to lithium-ion batteries in organic systems. For lithium batteries, high energy density, light weight and other advantages quickly make it a market protagonist. However, what factors affect lithium batteries?

First, lithium batteries and materials have a close relationship. For lithium-ion batteries, positive and negative electrode materials, electrolyte materials, etc. determine the performance and safety of lithium batteries, and also determine the cost of batteries.

Secondly, lithium batteries are closely related to the manufacturing process. The performance and cost of the battery are not only related to the material. Good materials are not enough. Why can we make good batteries when we sell them to South Korea? Because South Korea's manufacturing technology, processes and processes are relatively advanced. In China, the same materials, different manufacturers, the quality of the batteries produced are also different.

Therefore, for lithium batteries, materials are the foundation, and manufacturing processes and technologies are also crucial.

In fact, lithium battery materials are also constantly developing.

More than a decade ago, with the Advancement of lithium manganese oxide technology, electric vehicles began to enter the market. Today, lithium manganese oxide is still used to mix with ternary materials to drive electric vehicles, such as the larger Japanese leaf and South Korean LG batteries.

lithium iron phosphate is a very good second-generation material that solves the problem of the long life of the battery. Whether it is from safety, long life or cost, lithium iron phosphate batteries have become the first choice for today's energy storage batteries, and it is also a priority for energy-saving car batteries.

With the continuous improvement of energy requirements for batteries, ternary materials have gradually become the mainstream. Of the three raw materials, lithium manganese oxide accounts for about 70 %, and lithium iron phosphate accounts for less than 30 %. Today, in order to increase the specific energy of batteries, battery companies will increase three raw materials to 50 %, 60 %, or even higher, and can reach almost 170 watts per kilogram of energy.

At present, the domestic good battery material enterprises have slowly integrated into the international supply chain, including electrolytes, negative material market mainstream suppliers. However, the equipment and technology is still a short plate in our country, so to make good battery products, we should plan from the whole. Whether through the introduction of equipment, technology or independent development, we should upgrade our overall manufacturing technology and manufacturing technology to the international advanced level. By then, our battery industry will be competitive.

Through the evolution and development of battery materials, manufacturing technologies and manufacturing processes are also constantly improving and innovating. Now, lithium batteries on the market have basically met the needs of battery safety applications.

For the battery industry, to improve the quality of batteries, it is necessary to improve the entire battery technology chain. From materials to manufacturing, to systems, only if the industrial chain has developed in concert, can we form a synergy and form an industrial development advantage.

The page contains the contents of the machine translation.