The energy storage system mainly consists of five major parts: battery pack, PCS (energy storage converter), isolation transformer, safety protection and monitoring device, and EMS energy management system：
1、Battery pack：The battery pack is a core component of the industrial and commercial energy storage system, consisting of multiple batteries connected in series for the charging, discharging, and storage of electrical energy.
2、Energy storage converter PCS (bidirectional operation)：The energy storage converter is an important equipment in the energy storage system, which can achieve bidirectional operation of inverter rectification and conversion between AC and DC. The working principle of PCS needs to be implemented through a control system. Inverters are used to convert the DC power output from storage devices into AC power to meet the power needs of industrial and commercial equipment.
3、isolation transformer：Realize the conversion of high and low voltage, and isolate high-voltage equipment and batteries.
4、Safety protection and monitoring devices：The industrial and commercial energy storage system needs to be equipped with safety protection and monitoring devices to ensure the safe operation of the system. This includes the Battery Management System (BMS) used to monitor and manage the working status, temperature, voltage, etc. of batteries; Overcurrent protection device is used to prevent equipment from being damaged by overcurrent; The over temperature protection device is used to prevent overheating, and to prevent overcharging and over discharging of the battery, which can improve the utilization rate of the battery.
5、EMS Energy Management System：Summarize the information within the energy storage system, comprehensively control the operation of the entire system, and make relevant decisions to ensure the safe operation of the system.
In summary, the components of the industrial and commercial energy storage system work together to achieve the storage, conversion, and management of electrical energy, providing reliable energy support for the industrial and commercial fields.