Domestic Power Battery Technology Beware of the Risk of "Blocked Neck"

May 25, 2019   Pageview:77

At present, the trade war of "Made in China 2025" initiated by the United States continues to ferment, and the "ZTE incident" has caused a strong shock in the industry. Recently, the United States seems to point its finger at Huawei, a global telecommunications equipment giant, once again touching the pain point of the lack of core technology in China's manufacturing industry. In the fierce trade war, the United States is pressing, multi-line fire, China's power lithium battery industry should also guard against similar risks.


According to the battery China understanding, at present in our country Power battery Manufacturers have more than 200, is a country has the most power battery company in the world. Data show that in 2017 the global power battery sales top ten enterprises, Chinese enterprises accounted for 7 seats. Forbes news network reported, by 2020 China in global battery market share of more than 70%.


Although our country has formed a comparatively perfect power battery industry chain, the size is enough "big", but "strong" enough, still had some key core technology, there is the risk of ZTE type "stuck" neck.


Among them, The lithium battery Membrane technology is a sore point power battery industry of our country at present. In Lithium ion batteries Materials, anode materials and electrolyte is basically realized localization, started late and the diaphragm, the domestic enterprise technology maturity is not high. Although our country in recent years, lithium battery diaphragm in improving localization rate, but the main is the low end of the 3 c battery diaphragm market, high-end diaphragm localization rate is still low, high-end 3 c battery and power battery diaphragm is still a large number of imports.


According to the national ministry of industry and information technology issued by the "energy conservation and new energy vehicles industry development planning (2011-2020), by 2020, the pure electric vehicles and plug-in hybrid car production capacity of 2 million units per year. Accordingly estimation, the future of our country every year need high quality demand of vehicle power battery diaphragm material will reach hundreds of millions of square meters.


As is known to all, the structure of lithium-ion batteries, the diaphragm is one of the lining of the key components, both to prevent the positive and negative contact, and to ensure that the electrolyte ions. So the quality of the diaphragm will directly influence on the performance of the battery capacity, cycle and safety features, such as excellent quality of diaphragm plays an important role to improve the comprehensive performance of the battery.


It is understood that the diaphragm is the lithium electricity material contains the highest technical barriers to a high value-added material, about 15% of the cost of lithium-ion battery, its technical difficulty lies in the pore of engineering technology, the base material, and manufacturing equipment.


Common problems in current domestic diaphragm is consistency is not high, mainly displays in irregular defect, porosity is not up to standard, thickness, porosity and pore size distribution is not equal. Uniaxial extension of domestic PP membrane on porosity and pore diameter distribution compared with foreign products close to; Two-way stretch in stages of the PE membrane compared with foreign products usually low porosity, pore size distribution is not ideal. These problems are the potential risk of industry "others", if the solution is not good may contain lithium electric industry health development in our country.


Battery China understand that American Celgard diaphragm co., LTD., PP membrane and Asahi PE membrane, respectively, represents the highest level of the diaphragm industry products. Since Celgard Asahi acquisition in 2016, the best membrane products are from Asahi. Several other Japanese companies, such as UBE and Toray, also has the high level. In PP diaphragm and PE membrane technology in China and the United States, Japan and other state-owned large gap, in a passive position in the industry chain.


At present, lithium ion battery diaphragm preparation methods mainly wet process and dry process. Lithium ion battery diaphragm in the dry process in our country has made significant breakthrough, but in the field of wet diaphragm, diaphragm domestic enterprises are limited by many factors such as technology, technical, product level is still low, a large number of imported production equipment.


Like chips, high-end membrane technology has a very high threshold, not only to invest a huge sums of money, also need to have a strong r &d and production team, skilled technology and a high level of production line, and not a short time to breakthrough. A trade war with China, ZTE, Huawei's events, however, has been to China's manufacturing industry is a wake-up call, for the whole power battery industry, the breakthrough lithium battery high-end diaphragm technology is urgent as soon as possible.


The good news is, the domestic existing zhongke science and technology, star source material, and other enterprises in high-end diaphragm has a major breakthrough in the technology. Believe that in the near future, our country power lithium battery industry is bound to break the foreign technology monopoly, hold the initiative in their own hands.


The page contains the contents of the machine translation.

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