Energy storage refers to the process of storing energy through a medium or device and releasing it when needed

Interpretation of the whole industry chain of energy storage

What is energy storage?

The energy storage industry is the key and driving force for the transformation of the energy structure. Accelerating the development of the energy storage industry is of great significance to promoting economic development and building a healthy energy output and consumption system.

Energy storage refers to the process of storing energy through a medium or device and releasing it when needed.

Energy storage refers to the process of storing energy through a medium or device and releasing it when needed

What is the value of energy storage?

Power value is real-time power balance
The output of new energy on the power supply side is balanced, and the power flow on the grid side is supported by the safety power and frequency regulation of the power grid in the end area.
Responding to power grid security incidents, user-side power quality management.

Capacity value is improve system capacity factor
Improve new energy power stations on the power supply side, capacity reliability, capacity reserve on the grid side; congestion management, capacity fee management on the user side.

Energy value is energy throughput and transfer
Improve the new energy consumption capacity on the power supply side, cut peaks and fill valleys on the grid side, and arbitrage peaks and valleys on the user side.

Distribution of energy storage industry chain

Upstream is equipment, mainly including battery management system, energy management system, battery system, converter, other

The midstream is the system development and operation and maintenance, mainly including energy storage system integration, energy storage system installation, energy storage system operation and maintenance, energy storage system

The downstream is the application, mainly including the power generation system, the grid system, and the user system.

What are the energy storage technologies?

Energy storage technology: thermal energy storage, electric energy storage, hydrogen energy storage.Among them, electrical energy storage includes electrochemical energy storage, electromagnetic energy storage, and mechanical energy storage.

Electrochemical energy storage includes lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, and flow batteries.

Electromagnetic energy storage: supercapacitor, superconducting energy storage

Mechanical energy storage:pumped hydro energy storage, gravity energy storage, compressed air energy storage, flywheel energy storage.

What are the energy storage technologies

Energy storage policy environment

In recent years, China’s energy storage industry has accelerated its pace of development in terms of project planning, policy support and capacity layout, and the industry has become more standardized. At present, Chian’s relevant policies on energy storage are mainly divided into four categories:

Category 1: Demonstration project construction
The Ministry of Industry and Information Technology promotes Shanxi, Shandong, Hebei, Henan, and Inner Mongolia to build typical demonstration projects of cascade utilization in the fields of energy storage, communication base station backup power, etc. The China Development and Reform Commission’s press conference in May actively invests in large-capacity energy storage facilities and develops “source network load”. “Integration of Storage and Storage” Demonstration Project Construction.

The second category: indicating the direction category
The National People’s Congress proposed the development of energy storage, which has set the keynote for China’s energy transformation. The National Energy Administration promotes demonstration projects such as “photovoltaic + solar thermal”, photovoltaic sand control, and “new energy + energy storage” to further explore new models and new formats .

The third category: energy storage technology development category
The National Energy Administration of the National Development and Reform Commission of the Ministry of Education has promoted the research on key links of energy storage technology to reach the international leading level, and has formed a number of key technical specifications and standards to effectively promote the development of the energy revolution and energy Internet. The Ministry of Science and Technology has launched 21 energy storage technology directions around 6 Guiding tasks, it is planned to arrange 667 million yuan for the state-approved key special declaration fee.

The fourth category: energy storage development planning
The National Energy Administration of the National Development and Reform Commission, by 2025, the installed capacity of new energy storage capacity in China will reach 30 million kilowatts (ie 30GW). The principle of continuous energy storage for more than 2 hours is configured year by year.

The “battle” between energy storage technologies

Comparison of various energy storage technologies

Comparison of various energy storage technologiesof various energy storage technologies

Nine materials of lithium battery for energy storage

Lithium manganese oxide:
Low price, environmental friendliness, high working voltage, good safety performance and abundant resources, the main disadvantages are low specific energy and poor high temperature cycle, which limits its development.
Ternary is the current market mainstream, high nickel ternary is the future trend of ternary.
Silicon carbon material:
The mass specific capacity of silicon material can reach up to 4200mAh/g, which is considered to be a promising new-generation high-capacity lithium-ion battery anode material.
Lithium Hexafluorophosphate:
The most commercially used electrolyte occupies the core cost of the electrolyte.
Diaphragm material:
It is used to separate the positive and negative electrodes of lithium batteries, and only allow electrolyte ions to pass through to prevent short circuit due to contact between the two electrodes.
Soft package material:
Lithium battery aluminum-plastic film is the key material for the packaging of soft-pack lithium batteries, accounting for about 18% of the cost of soft-pack lithium batteries.
Binders are inactive components in lithium battery electrode sheets. Although it accounts for less than 1% of the cost of lithium batteries, its role is irreplaceable.
Conductive agent material:
Carbon nanotubes have the advantages of superior electrical conductivity, small addition amount, and improved compaction density. In the future, it may become the first choice for the battery industry.
Lithium battery copper foil/aluminum foil:
Lithium battery copper foil/aluminum foil can effectively improve the rate performance of lithium batteries and reduce the internal resistance of lithium batteries. It is one of the indispensable materials for improving the specific energy of lithium batteries.

Energy storage development trend and future forecast

China's energy storage capacity

The proportion of energy storage development in 2020
The development of pumped hydro storage is good, and the installed capacity in 2020 ranks first.

The proportion of energy storage development in 2020

The energy storage industry is developing on a large scale

By 2025, the scale of China’s new energy storage market will be nearly 10 times larger than the level at the end of 2020. The installed capacity of energy storage is expected to exceed 141GW in 2026, and the future of energy storage can be expected.

Power generation side:
The National Wind-Solar Storage and Transmission and Demonstration Project was completed, the 5000 kW x 2-hour all-vanadium flow battery energy storage demonstration power station in Wonushi, Liaoning was completed, the first and largest commercialized photovoltaic power station in China, and the Golmud Times New Energy 50MWp grid-connected photovoltaic power station Put into operation, Jilin wind storage demonstration project.

User side:
Hubei’s first optical storage charging station was put into operation, China’s largest commercial energy storage power station in Xingzhou Industrial Park, Wuxi New District, Jiangsu was in operation, Wanke Energy provided energy storage systems for Alibaba’s data center, and Shanghai’s first communication base station energy storage project was running smoothly.

Hybrid energy-storage modern trams rolled off the assembly line, China’s first offshore island smart microgrid was built in Yongxing Island, Sansha, Shanghai China Merchants Bank Building 1мW/2.56мWн energy storage system was successfully networked, Shanghai’s first commercial application building The user-side energy storage project, the 2MW/2.5MWh Tesla battery energy storage system launched by the British Arathon Football Club, the application of the energy storage system in the pastoral ecological park, the application of the 1MW/2MWh energy storage project in the Lafayette Castle Hotel in Beijing, the first in China A government building photovoltaic energy storage project landed in Anhui

In addition, there are cold chain logistics parks, residential power supply, distribution network side, multi-station integration, police station police offices, oil exploration, coal mines, schools, military camps, ship shore power, oil depots, hospitals, tunnels, islands, and zoos.

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