Water power, light power, wind power, biomass energy…. In recent years, China’s clean energy industry has risen rapidly. By the end of 2018. China’s installed power generation capacity of renewable energy reached 728 million kw, up 12 percent year on year, accounting for 38.3% of total installed power capacity. The cumulative installed capacity of wind power and photovoltaic power reached 184 million kw and 174 million kw respectively. Renewable energy plays an increasingly prominent role in replacing clean energy, which opens a broader development space for the energy storage industry. At present, the industry generally believes that a variety of energy complementary ear has come, energy storage will be on the cusp.
《Energy development“the thirteen five year” plan》mentioned, accelerate the construction of high quality load power, energy storage industry actively, carry out energy storage demonstration project construction, the construction of energy production, transportation, usage and energy storage system coordinated development of internet, integration of complementary energy, promote energy storage system coordination with new energy, electric power system optimal operation.
Commercialization of energy storage still faces challenges
The development of energy storage is of great significance. As an important component and key supporting technology of smart grid, high-proportion renewable energy system and” internet+” smart energy, energy storage has considerable market value, and the “trillion” scale has become the basic consensus, but the challenges of commercialization at the present stage cannot be ignored.
In recent years, China‘s energy storage industry, compressed air energy storage, flywheel energy storage, superconducting energy storage and super capacitor, lead battery, sodium sulfur battery liquid flow battery and other energy storage technology research and development and application accelerated, especially lithium ion battery as one of the main technical paths of energy storage, rapid development. The anode materials of lithium ion battery mainly focus on carbon materials, alloy materials and lithium titanate and so on. Although carbon material has the advantages of wide source, simple synthesis process, non-toxic and harmless, but the potential of carbon electrode and lithium metal is close, when the battery overcharge is easy to precipitate metal lithium on the surface of the carbon electrode to form lithium dendrites, lithium dendrites will Pierce the membrane and cause short circuit, bringing great safety risks. If the alloy material is used as the negative electrode replacement material, the carbon material has some safety problems and the specific energy is also improved. However, in the process of charging and discharging, the volume is easy to change greatly, and it is also easy to penetrate the diaphragm and cause short circuit.
In addition to safety, in the process of energy storage commercialization, high cost is a major bottleneck that hinders the development of energy storage industrialization. In fact, in addition to pumped storage capacity, all kinds of electrochemical energy storage, such as lead acid, lithium power and sodium sulfur, have relatively high costs. Without the policy of energy storage electricity price and subsidy policy, it is difficult to make profits. At present, the energy storage demonstration projects completed in China have verified the feasibility of energy storage technology, but the commercial operation mode has not been formed.
Industry experts believe that to promote the industrial development of energy storage, it is necessary to develop energy storage products with long life, low cost and high safety, and improve the cost-effective use of the user end.
Lithium titanate technology is expected to lead the development of energy storage industy
Safety has always been an advantage of lithium titanate. Carbon materials, alloy materials, alloy materials as a negative disadvantage is precisely the advantage of lithium titanate. Relevant research data show that the negative electrode of lithium titanate material can absorb the oxygen released by the decomposition reaction of the positive electrode, and the crystal structure will hardly change, greatly reducing the risk of thermal runaway of the battery, enabling the battery to meet the safe use standard in high temperature and low temperature environment, solving the safety problem.
Battery life is an important factor in determining cost. Lithium titanate is expected to be the first to realize the commercialization of energy storage by using long life cycle to spread the whole life cycle cost. According to expert introduction, and the traditional compared to lithium ion battery widely used graphite materials, lithium titanate material in the process of embedded to take off the charging and discharging lithium, skeletal structure is almost not occur contraction or expansion, known as "zero strain" material, to avoid the general electrode material take off, embedded lithium ion cell volume strain of electrode structure damage caused problems, so the life got great breakthrough. According to the experimental data, the cycle life of lithium titanate battery can reach more than 25,000 times, which is 4~8 times of ordinary lithium battery, and the life can reach 30 years.
Mention lithium titanate, have to mention the larger domestic lithium titanate battery production enterprises- yinglong new energy. We are very familiar with yinlong new energy vehicle, which has been operated in more than 100 cities in China. However, we do not know that yinlong is the first to lay out the energy storage industry, and then lay out the new energy bus. Yinlong has long realized that energy storage is a forward-looking technology to promote the development of new energy industry in the future and is committed to the research and development of energy storage technology. In 2017, silver and China electric power research institute and other units of the joint research “lithium titanate battery energy storage with low cost development and system integration technology development and application” project, the guarantee of lithium titanate battery at the same time, high safety, long life characteristics make costs have fallen sharply, was awarded the second prize of science and technology awards in Beijing, in addition to the related research results to the technical project “scenery storage lose demonstration project” project has been applied in the outside, for the 2022 winter Olympic Games in Beijing-zhangjiakou and Beijing for the development of electric vehicle industry, will also play an important role.
In addition to its advantages in safety and life, charging speed is also an important indicator for large-scale energy storage competition. According to the data, with the same capacity, traditional lithium batteries need to be charged for two to four hours, while lithium titanate batteries only need six minutes, which is considered to have a strong peak load adjustment value. The high multiplier performance of lithium titanate can provide 3C configuration system, providing users with a minimum scale or high multiplier system to complete FM and other auxiliary services, providing high multiplier input/output in an instant.
Lithium titanate has high stability and lone life cycle, and its performance is significantly better than traditional lithium ion batteries, which makes it have unique advantages in the application of energy storage scenarios, and it is very suitable for large-scale energy storage, which is called “one of the energy storage batteries with more application prospects” by the industry.
It is worth mentioning that in recent years, Yinlong has successfully developed a variety of energy storage products, which are widely used in home, community, industry, transportation, power grid and other scenarios.at present, China has built a megawatt level of lithium titanate battery energy storage station, and it is also the world’s 10 kv battery energy storage system without transformer directly connected to the power grid demonstration project. Abroad, the 1mw frequency-regulated container energy storage system of Yinlong titanium has been adopted by AES, an American power company. This system has successfully verified that Yinlong titanium battery can be applied to power grid frequency modulation and other auxiliary services stably. In addition, Vestas, the world’s largest wind power operator, and the Hawaii institute of natural energy, have all become customers of Yinlong titanium container storage systems.
In sponsored by Chinese Chemical and Physical Power Industry Association on the 9th China international conference on energy storage, with high safety, long life of lithium titanate intelligent energy storage products, silver long new energy was named”2019 annual energy storage industry more influential enterprises in China”, is to the silver of propulsion can contribute to the revolution of energy production and consumption.
