The components of a battery energy storage system generally include a battery pack, battery management system (BMS), power conversion system (PCS), control system (EMS), and auxiliary equipment.

1、Battery pack: A battery pack is the core part of an energy storage system, consisting of multiple battery units that can be connected in series or parallel according to system requirements and performance requirements. Its main function is to store electrical energy and release it when needed.

2、Battery Management System: The Battery Management System (BMS) is a key component for monitoring, managing, and controlling battery packs. It has functions such as battery status monitoring, temperature control, battery charging and discharging protection, and balancing to ensure the safety and performance of the battery pack.

3、Power Conversion System: The Power Conversion System (EMS) is responsible for converting the DC energy stored in the battery pack into AC energy for use by the power system or users. It includes equipment such as inverters and transformers to ensure the quality and stability of electrical energy.

4、Control System: The Control System (EMS) is the brain of the energy storage system, responsible for monitoring and controlling the operation of the energy storage system. It can optimize scheduling and energy management of battery packs, control charging and discharging based on demand and market signals, and ensure the safe and stable operation of energy storage systems.

5、Auxiliary equipment: Auxiliary equipment includes cooling systems, battery racks, and safety protection systems, etc. Its main purpose is to ensure the normal operation and safety of the energy storage system.

All these components work together to achieve the storage, conversion, and release of energy in battery energy storage systems. When designing and selecting each component, it is necessary to comprehensively consider factors such as application scenarios, energy requirements, performance requirements, and reliability.