Page | 009 contains a closed-loop liquid cooling system that circulates liquid coolant throughout the battery modules and power electronics to maintain an optimum operating temperature. The TMS works autonomously and does not require user feedback or controls to turn the system on when needed or to adjust temperature settings. The thermal roof, located above the battery bays within an IP20 enclosure, provides a ventilation airspace and contains fans and radiators that cool the ethylene glycol-water solution. The liquid cooling system utilizes approximately 360 liters (79 gallons) of the ethylene glycol-water solution, and the vapor compression portion of the cooling cycle utilizes 7.6 kilograms (16.8 pounds) of R-134a refrigerant.
MP2XL Construction and Design
The MP2XL is the larger version of the MP2. It is equipped with twenty-four battery modules to the nineteen found in the MP2. Its design, however, is almost identical to the MP2 other than being greater in length to accommodate the additional battery modules. Meaning, the MP2XL uses the exact same cells, battery modules, and power electronics (i.e., all the same internal components) that the MP2 utilizes in its design. Just like the MP2, the MP2XL is a standalone BESS consisting of battery modules, power electronics, a thermal management system, and control systems all pre-assembled within a single cabinet that is approximately 28.9 ft in length, 5.4 ft deep, 9.2 ft in height, and can weigh up to 84,000 pounds (8.800 m by 1.65 m by 2.785 m and 38,100 kg). Other small differences between the smaller MP2 and the MP2XL include:
• The MP2XL can be populated with up to twenty-four battery modules with a maximum storage capacity of 3,854.4 kWh for the 2-hour duration system, 3,847.2 kWh for the 3- hour duration system and 3,916.8 kWh for the 4-hour duration system. With up to twenty-four battery modules, the MP2XL can have up to 8,064 LFP cells.
• The thermal cabinet is located in the center of the cabinet next to the CIB, with four battery module bays flanking them on either side, as shown in Figure 3.
• The liquid cooling system utilizes approximately 400 liters (106 gallons) of the ethylene glycol-water solution, and the vapor compression portion of the cooling cycle utilizes 3.0 kilograms (6.6 pounds) of R-134a refrigerant.
For a more detailed discussion on the MP2XL components, their location, functionality, and purpose, refer to the MP2XL DIM. In addition, for a side-by-side direct comparison between the Megapack products, refer to Appendix 1, MP1 vs. MP2/2XL Comparison.
FEI Project # 22035 Page 7 01/23/2023 22035-03R (MP2 and MP2XL FPE Report)
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