Lithium iron phosphate batteries have a series of unique advantages such as
high working voltage, high energy density, long cycle life, low self discharge
rate, no memory effect, green environmental protection, etc. They also support
stepless expansion and are suitable for large-scale energy storage. They have
good application prospects in fields such as safe grid connection of renewable
energy power stations, grid peak shaving, distributed power stations, UPS power
supply, emergency power supply systems, etc.
According to the latest energy storage report released by international
market research institution GTM Research, the application of grid side energy
storage projects in China in 2018 has led to a continuous increase in the use of
lithium iron phosphate batteries.
With the rise of the energy storage market, in recent years, some power
battery companies have expanded their energy storage business to explore new
application markets for lithium iron phosphate batteries. On the one hand,
lithium iron phosphate, due to its ultra-long lifespan, safe use, large
capacity, and green environmental protection, can be transferred to the energy
storage field, which will extend the value chain and promote the establishment
of a new business model. On the other hand, the energy storage system supporting
lithium iron phosphate batteries has become the mainstream choice in the market.
According to reports, lithium iron phosphate batteries have been attempted for
use in electric buses, electric trucks, user side, and grid side frequency
regulation.
1. Safe grid connection of renewable energy generation such as wind power
and photovoltaic power. The inherent randomness, intermittency, and volatility
of wind power generation determine that its large-scale development will
inevitably have a significant impact on the safe operation of the power system.
With the rapid development of the wind power industry, especially in China where
most wind farms are "large-scale centralized development and long-distance
transmission", the grid connected power generation of large-scale wind farms
poses a serious challenge to the operation and control of the large power
grid.
Photovoltaic power generation is influenced by environmental temperature,
sunlight intensity, and weather conditions, and exhibits a random fluctuation
characteristic. China is showing a development trend of "decentralized
development, low voltage local access" and "large-scale development, medium to
high voltage access", which puts forward higher requirements for peak shaving of
the power grid and safe operation of the power system.
Therefore, high-capacity energy storage products have become a key factor
in solving the contradiction between the power grid and renewable energy
generation. The lithium iron phosphate battery energy storage system has the
characteristics of fast working condition conversion, flexible operation mode,
high efficiency, safety and environmental protection, and strong scalability. It
has been applied in the national wind and solar energy storage and transmission
demonstration project, which will effectively improve equipment efficiency,
solve local voltage control problems, improve the reliability of renewable
energy generation, and improve power quality, making renewable energy a
continuous and stable power supply.
With the continuous expansion of capacity and scale, and the maturity of
integrated technology, the cost of energy storage systems will be further
reduced. After long-term testing of safety and reliability, lithium iron
phosphate battery energy storage systems are expected to be widely applied in
the safe grid connection and improvement of power quality of renewable energy
generation such as wind power and photovoltaic power.
2. Peak shaving of the power grid. The main means of peak shaving in the
power grid has always been pumped storage power plants. Due to the need to build
two reservoirs, the upper and lower, for pumped storage power stations, which
are greatly limited by geographical conditions, it is not easy to build them in
plain areas, and they also occupy a large area with high maintenance costs. The
use of lithium iron phosphate battery energy storage system to replace pumped
storage power stations, in response to peak loads in the power grid, is not
limited by geographical conditions, has free location selection, less
investment, less land occupation, and low maintenance costs. It will play an
important role in the peak shaving process of the power grid.
3 Distributed power plants. The inherent defects of large power grids make
it difficult to ensure the quality, efficiency, safety and reliability
requirements of power supply. For important units and enterprises, dual or even
multiple power sources are often needed as backup and protection. The lithium
iron phosphate battery energy storage system can reduce or avoid power outages
caused by power grid failures and various unexpected events, and plays an
important role in ensuring safe and reliable power supply in hospitals, banks,
command and control centers, data processing centers, chemical materials
industries, and precision manufacturing industries.
4 UPS power supply. The continuous and rapid development of the Chinese
economy has led to the diversification of user demand for UPS power, resulting
in a sustained demand for UPS power from more industries and enterprises.
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