Energy is an important material basis for human survival and social development, and an important cornerstone for national economy, national security and sustainable development. With the development of human society, human's demand for energy is increasing, but the ecological environment is deteriorating, especially the increasingly severe global climate change caused by greenhouse gas emissions. This contradiction has become more serious in recent years. At present, my country has become a major energy producer and consumer in the world, and my country's demand for energy continues to grow. Therefore, it is urgent to adjust the energy structure. renewable energy.

Renewable energy includes: wind energy, solar energy, biomass energy, ocean energy and small hydropower, etc. It is a primary energy source, which is usually converted into electricity for use. In the process of developing and utilizing renewable energy, electrical energy storage technology plays an important role.