The battery is a crucial component within the BESS; it stores the energy ready to be dispatched when needed. A battery contains lithium cells arranged in series and parallel to form modules, which stack into racks. . A battery energy storage system is of three main parts; batteries, inverter-based power conversion system (PCS) and a Control unit called battery management system (BMS). Figure 1 below presents the block diagram structure of BESS. Figure 1 - Main Structure a battery energy storage system What are. . The energy storage consists of the cabinet itself, the battery for energy storage, the BMSS to control the batteries, the panel, and the air condi tioning (AC) to maintain the battery t emperature. The power conversion system (PCS) handles AC/DC and DC/AC conversion, with energy flowing into the batteries to charge them or being converted from the batter storage into AC power and fed into the grid. Racks can connect in series or parallel to meet the BESS voltage and current. . For renewable system integrators, EPCs, and storage investors, a well-specified energy storage cabinet (also known as a battery cabinet or lithium battery cabinet) is the backbone of a reliable energy storage system (ESS). BMSThermal ManagementIP RatingPV & Wind IntegrationLiquid CoolingModular ESS. . This article will analyze the structure of the new lithium battery energy storage cabinet in detail in order to help readers better understand its working principle and application characteristics. the new lithium battery energy storage cabinet usually consists of Shell, battery module, battery. .