Electrochemical energy storage system

　　The electrochemical energy storage system mainly consists of battery packs, battery management systems (BMS), energy management systems (EPMS), and energy storage inverters (PCS).

　　In terms of cost. The cost of battery packs accounts for the largest proportion, with the highest accounting for about 70% of the entire electrochemical energy storage system, followed by energy storage inverters and battery management systems, each accounting for about 10%.

　　In terms of functionality. A battery pack is usually composed of multiple battery modules in parallel, each of which is composed of multiple cells in series or parallel. It is the core of an electrochemical energy storage system and is mainly responsible for the storage and release of electrical energy within the system.

　　The Battery Management System (BMS) mainly monitors various data during the charging and discharging process of the battery pack, such as temperature, current, voltage, and State of Charge (SOC), and sends out alarm signals when the data is abnormal, thereby ensuring the safe and stable operation of the energy storage system.

　　The Energy Management System (EMS) mainly consists of two parts: basic functions and application functions.

　　Basic functions refer to computers, operating systems, and EMS support systems, etc; The application functions include data collection, data analysis, network monitoring, and energy scheduling.

　　The energy storage inverter (PCS) consists of a DC/AC bidirectional converter, control unit, etc. It can control battery charging and discharging, and is responsible for the conversion of AC and DC power.

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