The popularity of new energy vehicles has made lithium carbonate, the raw material of lithium batteries, "white oil". In battery technology, another technical route "vanadium power" is also quietly blooming.
In mid-February, the "200MW/800MWh Dalian Flow Battery Energy Storage Peak Shaving Power Station National Demonstration Project" officially announced that the main project construction had been completed. The power station is the first 100MW large-scale electrochemical energy storage national demonstration project in China, and will also become the world's largest all-vanadium flow battery energy storage project. It is expected to complete the grid connection and commissioning in June this year.
What is the concept of the world's largest battery energy storage project? According to Guangming.com, the power station has an energy storage capacity of 400MWh, which is equivalent to storing 400,000 kWh of electricity. According to the average monthly electricity consumption of a household of 200 degrees, it can supply more than 2,000 households for a month. As a peak shaving power station, this can relieve the peak shaving pressure of the local power grid and make up for the electricity demand in time.
Energy storage is the core of the new energy industry revolution. Under the background of "double carbon", the proportion of coal-fired power usage is bound to decline, but new energy sources such as wind power and solar power have long been faced with discontinuous, unstable and uncontrollable characteristics. Therefore, how to better store these energy sources has become the key to the use of green electricity.
From the perspective of energy storage structure, my country is still mainly based on pumped hydropower storage. When electricity consumption is low, water is pumped from the lower reservoir to the upper reservoir through electricity, and water is released to generate electricity at peak electricity consumption. In 2020, the proportion of pumped hydropower storage in my country will reach nearly 90%, and the second is electrochemical energy storage, including lithium-ion batteries, lead batteries, flow batteries and other technologies.
However, pumped hydropower has high geographical requirements and is often built in areas such as reservoirs, which is not suitable for all scenarios. In the face of large-scale energy storage scenarios (such as grid connection) or consumer scenarios (such as new energy vehicles), electrochemical energy storage technology can become a good supplement.
Electrochemical energy storage technology has developed rapidly in recent years. As one of the branches, vanadium electricity has the characteristics of environmental protection, no pollution, long life, high conversion efficiency (up to 65%-80%), stable performance, and high frequency repeated charging. "Large power bank".
If lithium battery is the well-deserved "king" in the energy storage market, then vanadium battery is a new star in the large-scale electricity storage scene.
