This system adopts the outdoor container BESS system, which contains high quality LFP battery cells, intelligent battery management system and the group technology. We can supply safe, reliable, stable power supply solutions, to provide comprehensive highly quality energy.
The BESS topological drawing shows the design of BESS and how the AC, DC, and control sections are interconnected. In DC section, one battery bank is made up with certain number of racks in accordance with the system configuration and normally one battery bank connects to one PCS. Several combinations of PCS and battery system establish the whole BESS.
*BESS Topological Drawing
LiFePO4 Battery Cell
The LiFePO4 Battery cell, the basic unit of lithium iron phosphate battery, consists of positive, negative electrodes and electrolyte, with rated voltage of 3.2V and rated capacity of 280Ah. Narada adopts advanced LFP chemistry batteries, enjoying low cost, high efficiency and reliability as well as industry-leading safety technology. The battery cell is sealed in aluminum enclosure as shows in the following picture.
*Specification of Battery Cell
Battery Module
One battery module consists of a number of cells in a manner of 1P52S, with rated voltage of 166.4V and rated capacity of 280Ah. The battery module and BMS adopt unified standard modular design to ensure the universality of the system. Flexible configuration, multiple battery modules can be in serial for expanding voltage and capacity. Battery modules are independently designed for easy maintenance and installation.
*Specification of Battery Module
Battery Rack
A number of modules and control box are connected in series through electrical connectors, delivers high voltage up to 1331.2V in rated voltage and 280Ah in rated capacity. Each battery rack contains 8 modules and 1 control box, which integrates BCU, disconnector, contactors, pre-charge resistor, fuses, current sensors and switching power supply.
*Specification of Battery Rack
Battery Container
The populated 20ft NWI liquid-cooling energy storage container is an integrated high energy density system, which consists of battery rack system (280Ah LFP cell), BMS (battery management system), FSS (fire suppression system), thermal management system and auxiliary distribution system.
*Battery Container Layout
Battery Management System
BMS collects, processes and stores the important information during the operation of the battery module in real time, and exchanges the information with the external equipment to give real-time alarm and protection during the operation of the battery module. BMS generally adopts multi-level distributed architecture design. For three-level architecture, BMS system is composed of module level BMU, rack level BCMU and bank level BAMS. The overall control and communication diagram is shown as below:
*BMS Communication Diagram
