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MAIN PERFORMANCE INDICATORS OF ENERGY STORAGE BATTERIES

Peak-shaving and valley-filling energy storage batteries

Due to the fast charging and discharging characteristics of battery energy storage system, it is charged during low load periods and discharged during peak load periods, thereby shaving and filling the power load of isolated microgrids, alleviating the power generation pressure of microgrids during peak power consumption, ensuring the reliability of microgrid power supply, and reducing the number of start and stop times of generator units during low power consumption periods, thereby increasing the micro increase rate of power consumption of generator units. [pdf]

Recommendation on cost performance of energy storage battery

This paper defines and evaluates cost and performance parameters of six battery energy storage technologies (BESS)—lithium-ion batteries, lead-acid batteries, redox flow batteries, sodium-sulfur batteries, sodium-metal halide batteries, and zinc-hybrid cathode batteries—four non-BESS storage systems—pumped storage hydropower, flywheels, compressed air energy storage, and ultracapacitors—and combustion turbines. [pdf]

New energy storage is listed as the main body of the field

Pumped storage is still the main body of energy storage, but the proportion of about 90% from 2020 to 59.4% by the end of 2023; the cumulative installed capacity of new type of energy storage, which refers to other types of energy storage in addition to pumped storage, is 34.5 GW/74.5 GWh (lithium‐ion batteries accounted for more than 94%), and the new incremental growth in 2023 is 260% year‐on‐year; the price of lithium‐ion batteries has dropped significantly.10–12 However, according to the data from China Electricity Council (CEC),the average annual utilisation hours of new energy storage in 2023 is 615 h, and the utilisation level is generally not high.10 Therefore, it is necessary to sort out the demands and challenges of energy storage technology to provide reference for the development of the energy storage industry. [pdf]

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