SMM News: in recent years, with the increase in the scale of new energy power generation and the continuous decline in the cost of lithium batteries, driven by policy assistance, electrochemical energy storage is developing rapidly. The data show that by the end of 2019, the cumulative installed capacity of electrochemical energy storage in the world is 9520.5MW. Among all kinds of electrochemical energy storage technologies, the cumulative installed scale of lithium-ion battery is the largest, reaching 8453.9MW. Some institutions predict that with the further expansion of market demand, the continuous decline of battery costs and the improvement of technology, and the increase of policy support, the electrochemical energy storage industry is expected to maintain an annual compound growth rate of about 60% in the next five years, and the installed scale will be close to 24GW by the end of 2024.
Thanks to the rapid development of the new energy vehicle industry, the performance of lithium battery has been greatly improved, and the cost has continued to decline. As the basic unit of electrochemical energy storage, the safety, cycle life and cost of lithium battery have been significantly improved. It has gradually met the needs of different energy storage applications.
Where is the "strategic vantage point" of energy storage?
It is worth noting that, unlike electric vehicles, the energy storage system is more complex and large. "as the 'brain' of an energy storage project, the energy storage system includes thousands or even tens of thousands of cells, battery modules, battery management systems, energy management systems, and energy storage converters." according to industry insiders, the energy storage system integrates many basic energy storage units, involves many links, and connects downstream applications. The technology is complex and difficult, which is the core link of energy storage engineering, so it is a very powerful part of the energy storage industry chain.
If you have the right to speak, you have the right to negotiate. It is precisely because the energy storage system plays an important role in energy storage projects, in recent years, newcomers in the field of energy storage have increased their investment in this link, hoping to take the initiative.
Yinlong New Energy, which has been involved in the field of energy storage system for many years, has been strengthening its "moat" in the field of energy storage system in recent years. Recently, Yinlong New Energy has been awarded the "most influential Enterprise Award in China Energy Storage Industry" for its highly safe and efficient lithium titanate intelligent energy storage products.
The success lies in the safety, but the win lies in the "safety".
"High safety, long life and low cost" is the driving logic and core requirement for the development of electrochemical energy storage industry. "there are many evaluation indicators of the energy storage system, such as safety, economy, reliability, efficiency, ease of operation and maintenance," industry insiders said. Among them, safety is the most important index. If the safety performance of the energy storage system cannot be guaranteed, it is impossible to talk about the application of energy storage projects.
In fact, the high safety design of the energy storage system gives more feedback to the energy storage project than expected. According to the person in charge of Yinlong new energy storage, lithium titanate material, known as "zero strain material", has a stable three-dimensional crystal structure, which almost does not change in the process of charge and discharge, and is safe and stable. long cycle life and high rate charge and discharge, charge and discharge in an ultra-wide temperature range of-50 ℃ ~ 60 ℃. Based on the core technology of lithium titanate, Yinlong New Energy has successfully developed a series of energy storage products such as nano-lithium titanate materials, batteries, batteries, battery modules, battery packs, communication base station energy storage modules, container energy storage systems, etc., ranging from KW to MW. With long cycle life, good safety performance and good wide temperature resistance, Yinlong new energy lithium titanate battery fits the application scene of Electroweb energy storage very well, and is known as one of the most promising energy storage batteries in the industry.
The head of Yinlong new energy energy storage explained that taking Yinlong energy storage safety design as an example, Yinlong new energy storage battery management system adopts megawatt active balanced design, which improves the long-term use consistency and safety of cells at the same time. Energy storage efficiency has also been improved, and the service life has been increased by more than 20%, which is of great help to improve the service life of energy storage projects. With the increase of the service life of the energy storage system, the performance-to-price ratio of the whole life cycle of the energy storage project will be higher, and the overall income of the energy storage project will also increase.
"in the heat dissipation design of the energy storage battery system, millimeter circulating air ducts are built in the system to achieve accurate thermal management of each single cell. The 'matrix heat dissipation technology' can ensure the cell in the optimal working temperature environment for a long time, improve the safety of the system at the same time, and greatly prolong the cycle life of the cell." According to the person in charge of Yinlong New Energy Energy Storage, "the two safety-based system designs significantly improve the safety of the system, prolong the useful life of the energy storage system, and at the same time reduce the operation cost of the energy storage project in disguise."
It is understood that in recent years, in order to improve the safety of electric vehicles, power battery enterprises gradually increase the capacity of single cells, on the one hand, they can reduce the number of cores in the battery pack and reduce the safety risk. At the same time, it can also improve the energy density of the battery package system. "Yinlong New Energy uses large-capacity cells in the energy storage battery pack, the number of container cells of the same size is reduced, the energy density can be greatly increased, and the reliability of the system is significantly enhanced." The head of Yinlong New Energy Energy Storage said that this design can achieve safety, cost and capacity of three birds with one stone.
Prevention is greater than remedy, which is more obvious in the field of energy storage. Once a fire occurs in an energy storage project, there is almost no room for remedy. "Real-time monitoring of energy storage cell data, early warning and taking measures can often greatly reduce the risk," said an industry analyst. "at this point, we have applied cell operation intelligent early warning to the energy storage system," according to Yinlong New Energy. Its energy storage system "allows real-time monitoring, AI data analysis and cloud storage, and automatically generates health assessment reports."
Cost: it is still an important variable driving the application of electrochemical energy storage.
Energy storage can provide peak regulation, frequency modulation, backup, black start, demand response support and other services for Electroweb operation, which is an important means to improve the flexibility, economy and security of traditional power system. In recent years, with the continuous decline of the cost of lithium battery, the installed capacity of electrochemical energy storage began to increase rapidly. However, the current large-scale application of electrochemical energy storage still needs to continue to reduce the cost. "the cost of a complete energy storage system includes battery system, energy storage converter, and other components of the system, and each link has its own cost reduction logic," industry insiders said. Technological innovation from the system level to achieve cost reduction in disguise has also become the direction of enterprises' efforts.
If the charge and discharge efficiency of the battery itself is 95%, the efficiency will be reduced by the integration mode in the practical application after system integration. The higher the integration efficiency is, the less the energy loss is in the process of charge and discharge, and the total charge and discharge capacity of the system can be increased. Yinlong energy storage system in the battery, through technical research, strictly control the consistency of the battery, maximize the utilization of the battery system; in the system loss, strictly control the power consumption of each system component, formulate a reasonable operation strategy according to the operating conditions, reduce the system power consumption, and greatly improve the overall efficiency of the energy storage system.
In the field of Electroweb FM, Yinlong New Energy also launched a high power density industrial energy storage system according to the characteristics of the energy storage application scene. based on the ultra-long cycle life of Yinlong lithium-ion battery, the life of the energy storage system charged with Discharge is up to 30, 000 times, 10 times higher than that of other lithium-ion batteries, and the ultra-long cycle life obviously dilutes the investment cost of the energy storage project and increases the income life of the project.
It is worth mentioning that Yinlong industrial energy storage lithium-ion battery system has the advantages of excellent high power performance, no fear of extremely cold and high temperature environment, millisecond response demand, ultra-high safety performance and high power and small footprint. Compared with other energy storage battery systems, it has obviously achieved the advantages of low cost, high safety and long life.
Yinlong new energy energy storage official said that energy storage to participate in AGC frequency modulation, greatly improve the unit frequency modulation performance, improve frequency modulation income, is currently one of the most commercial energy storage application modes. The FM minute-second scheduling instruction has short charging and discharging time and many times, and has high requirements for battery cycle life and magnification characteristics, so it is a power application, and the Yinlong high power energy storage system using lithium titanate battery is very suitable for such application scenarios. It can provide high-safety, long-life and low-cost solutions for power plant frequency modulation, wind and wind power generation auxiliary service, independent frequency modulation power station, user side energy storage power support, power expansion, optical storage and charging, etc.
Of course, as mentioned earlier, although the electrochemical energy storage industry has been developing at a high speed with the decline in the cost of lithium batteries, it still requires cost-side efforts to really promote the opening of the trillion-level energy storage market, but cost reduction will also be reflected in all aspects in the future. In addition to the continuous cost reduction of lithium batteries, BMS, EMS, PCS and energy storage systems, how to achieve more feedback throughout the application cycle of energy storage projects. It is also an important index to measure the performance-to-price ratio of energy storage system, which all depends on the technology input of enterprises, which is also the direction of energy storage system operators' efforts.
