In the context of global energy transition, new energy storage, as a key technology to support the largescale development of renewable energy and the stable operation of power grids, is gradually becoming the focus of the energy field.

1.Definitionofnewenergystorage

New energy storage refers to new electric energy storage technologies other than pumped hydro storage, including electrochemical energy storage (such as lithiumion batteries, leadacid batteries, sodiumsulfur batteries, etc.), compressed air energy storage, flywheel energy storage, superconducting energy storage, supercapacitor energy storage, etc. These technologies achieve spatiotemporal transfer and balancing of electrical energy by converting it into other forms of energy for storage, and then releasing it when needed.

Second, the advantages of new energy storage

1. Responsive

The new energy storage system can quickly respond to changes in the power demand of the power grid in milliseconds to seconds, provide auxiliary services such as frequency regulation, peak regulation, and backup for the power grid, and effectively improve the stability and reliability of the power grid.

2.Flexiblelayout

Compared with traditional pumped hydro storage, the installation location of the new energy storage is not limited by geographical conditions, and can be distributed close to the load center, reducing transmission losses and improving energy efficiency.

3. Environmentally friendly

Most of the new energy storage technologies do not produce greenhouse gas emissions, have a low impact on the environment, and meet the requirements of sustainable development.

4. Increase the capacity of renewable energy consumption

As the proportion of renewable energy (e.g. wind and solar) in the energy mix continues to increase, its intermittent and volatile nature poses great challenges to the power grid. The new energy storage can effectively smooth the output power of renewable energy, improve its gridconnected consumption capacity, and promote the large-scale application of renewable energy.

3. The development trend of new energy storage

1. Continuous technological innovation

Researchers are constantly exploring and developing new energy storage materials and technologies to improve the performance, life and safety of energy storage systems and reduce costs. For example, emerging technologies such as solidstate batteries and sodiumion batteries are expected to make breakthroughs in the future, providing a broader space for the development of new energy storage.

2. The scale continues to grow

Driven by policy support and market demand, the installed capacity of new energy storage is expected to maintain a rapid growth trend. According to relevant forecasts, the global new energy storage market will grow several times or even dozens of times in the next few years.

3.Diversifiedapplicationscenarios

The new energy storage will not only be widely used in the power system,but also play an important role in transportation,communications,industry and other fields.For example,the popularization of electric vehicles will drive the development of the on-board energy storage market,and the construction of 5G base stations requires alarge number of backup power energy storage systems.

4. Integrated development with new energy

The new energy storage will be deeply integrated with renewable energy to form a development model of "new energy energy storage" to achieve efficient use and stable supply of energy.

Fourth, obstacles to the development of new energy storage

1. The cost is higher

At present, the cost of new energy storage systems is still high, especially the cost of batteries in electrochemical energy storage, which limits their largescale application to a certain extent. Reducing costs is the key to the development of the new energy storage industry.

2. Security needs to be improved

Some new energy storage technologies (such as lithium-ion batteries) have certain safety risks, such as thermal runaway and fire. It is necessary to strengthen technology research and development and safety management to improve the safety of energy storage systems.

3. Imperfect standards and norms

The standards and specifications in the field of new energy storage are not sound enough, resulting in uneven product quality and chaotic market order. The establishment of a sound standard system and regulatory mechanism is essential for the healthy development of the industry.

4. The business model is immature

The business model of new energy storage is not clear enough, and the return on investment mechanism is not perfect, which affects the enthusiasm of social capital. Exploring innovative business models, such as energy storage sharing and energy storage leasing, is an important way to promote the development of the new energy storage industry.

To sum up, new energy storage, as an emerging force in the energy field, has broad development prospects and great potential. Although there are still some obstacles, with technological progress, cost reduction, policy support and market mechanism improvement, new energy storage will certainly play an important role in the future energy system and contribute to the realization of the global energy transition and sustainable development goals.