lithium ion powerwall.Green energy needs to be combined with energy storage technology

　　China's energy crisis has become increasingly serious. In 2010, my country's primary energy consumption was 3.25 billion tons of standard coal, which was 5.4 times that of 1980. Currently, China's dependence on foreign crude oil reaches 55%. Some people predict that China will surpass the United States next year to become the world's largest oil importer.

　　National energy security mainly has the following measurement criteria: energy import dependence, energy oil dependence, oil import dependence, and imported crude oil dependence on the Strait of Hormuz. The higher the proportion of these standards, the more dangerous the country’s energy security will be.

　　For China, the route for transporting oil from the Middle East to China passes through the Strait of Hormuz and the Strait of Malacca. From a strategic perspective, the above two maritime checkpoints are extremely unstable, which also creates problems for China’s imports. Oil poses a threat.

　　In order to reduce the country's energy dependence on foreign countries, in addition to developing free fossil energy, we must also develop a large amount of green energy, and green energy must be matched by energy storage technology.

　　The currently applied energy storage technologies are mainly divided into: physical energy storage, including pumped water energy storage, compressed air energy storage, etc.; chemical energy storage, such as lead-acid batteries, sodium flow batteries, lithium-ion batteries, etc.; electromagnetic energy storage technology, etc.

　　Among them, among the lead-acid batteries, lithium-ion batteries, flow batteries and other products used in electrochemical energy storage, flow batteries have the potential for large-scale energy storage, but currently the most widely used ones are lead-acid batteries.

　　In recent years, developed countries such as Japan, the United States, and Europe have invested heavily in battery energy storage technology, and the technology is generally ahead of the domestic level. The concept of "power storage for the people", that is, distributed energy storage technology for households, has emerged in these countries, but this slogan has just emerged in China.

　　In fact, with the development of China's domestic electric vehicle industry, there may be a large number of power batteries that will be eliminated from electric vehicles in the future. These batteries can be well used in distributed energy storage systems, which can effectively reduce the cost of energy storage systems. They can also take advantage of the difference in electricity prices at night to generate "power speculation" profits.

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