Large capacity battery energy storage system it refers to an energy storage device that can store a large amount of electric energy and release it for a long time. This technology has important applications in the fields of renewable energy development, power grid peak shaving, emergency standby power supply, etc. The following is the technical analysis of large capacity battery energy storage system:

1. battery Type selection:

   • lithium Titanate battery: it has the characteristics of high cycle life and good safety, and is suitable for the demand of long cycle charging and discharging.
   • Sodium Sulfur Battery: it has the characteristics of high energy density and long service life, and is suitable for large-scale energy storage requirements such as solar energy storage system.
   • Vanadium Oxide Battery: it has the characteristics of high cycle life and high charge and discharge efficiency, and is suitable for power grid peak shaving, emergency standby power supply and other fields.

2. Energy Storage System Design:

   • series and parallel connection of battery pack: through reasonable series and parallel design, the voltage and capacity matching of the system is realized, and the overall performance and reliability of the system are improved.
   • Temperature Management System: Effective temperature monitoring and control technology is adopted to ensure that the battery pack works in a suitable temperature range, prolong the battery life and ensure the safety of the system.
   • Safety Protection System: adopt multiple safety protection measures, such as overcharge, overdischarge, short circuit and other protection, to ensure the safety and reliability of the energy storage system under various working conditions.

3. Control and management system:

   • advanced battery management system (BMS): monitors the voltage, current, temperature and other parameters of the battery pack to realize intelligent management and protection of the battery and improve the safety and stability of the system.
   • Energy Management System (EMS): realize energy storage, release and scheduling management of energy storage system, automatically adjust energy flow according to power grid demand and battery status, and improve system efficiency and economy.

4. Aggregation and application:

   • large-scale energy storage system: through the aggregation of multiple battery packs, a large-capacity energy storage system is realized to meet the needs of large-scale applications such as power grid peak shaving and emergency standby power supply.
   • Integrated application of microgrid: combining large-capacity battery energy storage system with renewable energy power generation equipment, intelligent power distribution equipment, etc., to build a microgrid system with independent regulation and interconnection capabilities.

5. Cost and economy:

   • reduce manufacturing cost: through technological innovation and large-scale production, reduce the manufacturing cost of batteries, systems and management equipment, and improve the economy of energy storage system.
   • Reduce O & M cost: adopt intelligent management system to realize remote monitoring and maintenance of energy storage system, reduce O & M cost and improve the sustainable operation performance of the system.

Large capacity battery energy storage system is a hot technology in the field of energy storage at present. It adopts technical analysis on battery type, system design, control management, aggregation application, economy and other aspects, it is of great significance to promote the development and application of large-capacity battery energy storage systems. With the continuous development of renewable energy and smart grid, large-capacity battery energy storage system will play an increasingly important role in the future.