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 can be
used for safe grid connection, grid peak shaving, distributed power stations,
and other applications in renewable energy power plants UPS power supply,
emergency power supply systems and other fields have good application
prospects.
With the rise of the energy storage market, in recent years, some power
battery companies have laid out their energy storage business to explore new
application markets for lithium iron phosphate batteries. On the one hand, due
to its ultra long lifespan, safe use, large capacity, and green environmental
protection, lithium iron phosphate can be transferred to the energy storage
field, which will prolong the value chain and promote the establishment of a new
business model. On the other hand, energy storage systems for lithium iron
phosphate batteries have become the mainstream choice in the market. According
to reports, lithium iron phosphate batteries have been attempted for frequency
regulation on electric buses, electric trucks, user side, and grid side.
(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 belong to large-scale centralized development and long-distance
transmission, the grid connected power generation of large 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 on-site access" and "large-scale development, medium
and high voltage access", which puts higher requirements on grid peak shaving
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 continuous
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 used 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 load regulation
in the power grid has always been pumped storage power stations. 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 in
plain areas, and the land area is large, resulting in high maintenance costs.
The use of lithium iron phosphate battery energy storage systems to replace
pumped storage power stations can cope with peak loads in the power grid,
without being limited by geographical conditions, with free site 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.
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