At present, the domestic mainstream power batteries for passenger cars generally use ternary lithium and iron phosphate lithium battery, ternary lithium battery has been "temporarily suspended" due to safety problems, the future prospects are uncertain; Lithium iron phosphate battery is mainly composed of anode material, anode material, diaphragm and electrolyte. As a chemical power supply system, it is generally not prone to spontaneous combustion and other safety accidents within the range of designed working conditions. However, the anode of lithium ion battery is mainly made of graphite material, which is easy to precipitate lithium dendrite during overcharging, resulting in short circuit of battery and affecting the safety performance of lithium battery. At the same time, it is easy to form SEI film, which leads to low first charge and discharge efficiency and large irreversible capacity. As a result, the vast majority of electric vehicles now dare not carry out fast charging and releasing, but can only use the form of slow charging, which seriously restricts the operating efficiency of vehicles and brings about no small obstacle to the popularization of electric vehicles.
As the anode material of lithium ion battery, lithium titanate can form 2.4V or 1.9V lithium ion secondary battery with lithium manganese acid, ternary material or lithium iron phosphate and other cathode materials. In addition, it can also be used as a positive electrode, and lithium metal or lithium alloy anode to form 1.5V lithium ion secondary battery. The lithium titanate battery can be fully charged in 6 minutes and the cycle times can reach more than 25,000 times, which is obviously better than the traditional lithium iron phosphate battery in economy. Traditional lithium-ion batteries can fail at 160 degrees Celsius, but lithium titanate batteries can work smoothly at 240 degrees Celsius without overheating, and their safety is no less than rare earth batteries.
From this, we can basically see that which enterprise master the core technology of lithium titanate material, will have the control right of the world alone, the blue ocean boating.
Looking around the world, Japan, South Korea, the United States, Germany on lithium titanate materials have been studied for many years. At present, there are only two enterprises with more than 8 years of experience in the power and industrial application of lithium titanate materials in the world, one is Otitan Nanotechnology Co., Ltd. of the United States acquired by Yinlong, and the other is Toshiba Corporation of Japan. At present, there are 5 enterprises in China that are committed to the application and development of lithium titanate battery technology, of which Yinlong New Energy is a well-deserved leader and has the leading core advantage in molecular structure.
Yinlong New Energy signed an acquisition agreement with Aotai Nanotechnology Co., Ltd on September 20, 2010, and took strategic control of Aotai Nanotechnology Co., Ltd on July 22, 2011.
In 2013, zhuhai silver long in the basic "read" lithium titanate and lithium iron phosphate technology, launched a lithium titanate battery production, but also constantly seeking commissioning at home and abroad, including a silver tong electric bus in Hamburg, Germany's streets run for half a year, has become the first Chinese pure electric bus operating in Germany.
Over the years, through the strategic holding of American Otitan and continuous research and innovation, Yinlong has conquered five recognized problems in the industry, such as "high safety problem", "use problem under cold environment condition", "fast charge and discharge problem", "battery life problem" and "battery industrialization problem". At the same time, in view of the relatively low energy density and high cost of lithium titanate batteries, Yinlong has invested a lot of technical strength in special research and development.
In 2015, the fourth generation of high energy density lithium titanate batteries developed by Yinlong reduced the cost by 40% and increased the energy density by 30% compared with the third generation.
With the new energy vehicles gradually "warm up" in the past two years, Zhuhai Yinlong's lithium titanate material technology and hollow ring structure have once again become the "hot property" in the eyes of investors. In particular, the event of "Gree's acquisition of Yinlong" has been stirred up by the media.
Some analysts believe that Gree is not aiming at Yinlong's electric bus business, but lithium titanate battery technology. In addition to challenging the mainstream lithium ternary batteries and lithium iron phosphate batteries on the market, lithium titanate batteries with fast charge and discharge time, longer battery life, cold and heat resistance and other advantages can also play a role in energy storage and smart grid. Some professionals point out that "the quick charging performance of lithium titanate can make up for power in the short term when there is a call, which avoids the frequent start and stop of generators due to frequent power outages and greatly reduces OPEX for communication operators. With the next 25,000 cycles of lithium titanate, there is a great opportunity to replace existing colloidal batteries in off-grid locations."
As of February 2016, Zhuhai Yinlong New Energy Co., Ltd. has at least 20 investors (including limited partnership) behind it. Recently, 19 central enterprises plan to successively invest in Yinlong New Energy.
Dr. Zhang Changling from China Automotive Technology and Research Center believes that Yinlong's exclusive lithium-titanate battery technology has played an epoch-making role in the new energy industry.
We can believe that Yinlong New Energy, which controls the "core technology", is not only the "darling" of the capital, but also the frequent winner of the market!