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Energy storage industry technology application status The fastest growing is button cell battery cr1620

Big data and energy Internet, energy storage is the bottleneck technology. There are many energy storage technologies. Broadly speaking, energy storage includes heat storage, hydrogen storage, gas storage, etc. After these links are established, reasonable adjustments will be made. What is worth paying attention to now is storage batteries, lithium-ion batteries and flow batteries. The alliance database has a global development trend. At present, 97% of the power system is pumped storage system, and other countries have no room for development. The fastest growing is lithium-ion battery. We always turn lithium-ion batteries into energy storage benchmarks.

my country's pumped storage accounts for 99%, and electrochemical energy storage accounts for 1%. There is competition and complementary relationship in the current energy storage field, which is worth paying attention to. The load increase rate is very fast. The proportion of batteries in my country, renewable energy, grid connection, distributed generation and microgrids, these statistical results do not represent the future development trend. To a large extent, the application of batteries depends on the business model, and the business model depends on energy policy. The energy storage field prefers to call it a service. The power system can live well. If there is a service, it can greatly improve efficiency and reduce waste.

Cost reduction. Lithium-ion batteries, storage batteries and flow batteries have different utilization rates. This chart shows the cost reduction. From 2014 to 2017, the cost has dropped by 56%-60%. The latest cost is 90 cents, and the market price is 1.4 yuan, which is a little lower than this. Energy storage projects are system investments, and a 50% drop in costs is also a development prospect for the next three to four years.

Looking at new battery technologies, first study lithium-ion batteries. Whether it is solid-state batteries or sulfur batteries, the next 5-10 years are relatively clear. The scale of traditional batteries is also relatively clear. In the case of benchmark technology, other technologies will understand whether there are opportunities in the future.

There are many applications in the power industry, and there are representative cases in the domestic model. The energy storage project in 2015 used a variety of energy storage technologies. Behind the business model is the priority of the grid to mobilize wind power plants. There are many things that energy storage can do. The core issue is that under the existing electricity payment system, as well as policies and future development directions, energy storage on the grid-connected side of renewable energy can participate and get benefits from work. Electricity users have to pay, no matter how long they use it. Save electricity and pay the difference.

Ancillary services. In foreign power markets, there is at most a market mechanism for ancillary services. The domestic power market has not yet been established, and the spot market is still in the pilot stage. Although there are no ancillary services in the domestic power market, frequency regulation is not a rigid demand. The mechanism for the power grid to participate in the power ancillary service is just the performance change of the unit, and the performance of the new unit for ancillary services. The cost of the project under construction is much lower than it was at that time. The cost reduction and the two dimensions of power ancillary services and power station demand have accelerated the development of the energy storage industry.

Prospects for the commercial development of energy storage in my country. Some power stations have profit models. The northwest relies heavily on old photovoltaic power stations with high electricity prices, but power restrictions are more serious. There are problems with the ancillary service market because it is not the concept of foreign power spot markets, and there is a demand for ancillary services. North America has a 5% renewable energy ratio, and its ancillary services account for 2.5% of the power market. The proportion in the UK is as high as 27%. Among the 27% of renewable energy equipment, the service transaction volume accounts for more than 7% of the power market. If the power consumption side can participate in the compensation mechanism or peak-shaving and frequency regulation mechanism on the power demand side, its economic efficiency will improve. As costs decrease, it gradually becomes competitive. If it is further promoted by the policy environment, we will see its accelerated development process.

Vehicle-electric interconnection. The planning and development of electric vehicles are very detailed. Within ten years, from the user side, the system economy has an advantage over automobiles. This is just a matter of time. The development of electric vehicles is a great support for the power grid. If we want to use it, the cost of power grid production will be very low. If energy storage is very cheap, it will be expanded more widely when used.

Domestic energy storage direct and indirect policies. China pays less attention to energy storage than foreign countries. Since the 12th Five-Year Plan, it has gradually paid attention to batteries. In many policies, energy storage can be seen as a supporting technology, and different projects are supported. Five ministries and commissions just announced policies in October. The Energy Bureau, the National Development and Reform Commission, the Ministry of Finance, the Ministry of Science and Technology, and the Ministry of Industry and Information Technology issued guidance opinions on energy storage development to prepare books for the energy storage industry. Because its core is different fields, core technology is one aspect, and the main focus is on commercialization. Renewable energy, the flexibility of the power system, the power consumption side and the diversification of energy storage have clear policy support points. Provide services to the system, and the power system will compensate you. The current compensation should be functional price. In the future, practitioners and participants of energy storage projects should promote regional compensation policies for local auxiliary services. There should be a reference system for how much to compensate. A systematic system should be established to support industrial development. In 2011, there were a number of demonstration projects. In 2013, the project was purely for demonstration, and everyone studied the technical feasibility. In 2015, the company began to conduct commercial demonstrations, which may have certain effects. The development history of the industry can be seen on the power consumption side, auxiliary services, and power generation side. The power generation side has frequency regulation auxiliary services for energy storage, and the grid side has large-scale energy storage peak-shaving power stations. The user side includes photovoltaics, energy storage, and smart inverters. From a foreign perspective, power auxiliary services will be improved.

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