Tesla Megapack 2 and Megapack 2XL 2023

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module contains three battery trays, as shown in Figure 2, which are arrays of prismatic, lithium phosphate (LFP) cells. The LFP cells (the cells) utilized in the MP2 are 157.2 Ah with a nominal voltage 3.22 Vdc and are individually hermetically sealed. They are approximately 50.75 millimeters (mm) by 166.0 mm by 169.3 mm and weigh 2,991 grams (g). Each battery tray contains 112 cells, as shown in Figure 2; meaning, each battery module has 336 cells and a fully populated MP2 (nineteen battery modules) can have up to 6,384 cells.
Figure 2 MP2 unit layout, module layout, generalized tray layout, and an individual cell.
Customer Interface Bay
The customer interface bay (CIB) is a user-accessible area designed for operation and servicing. The CIB, as shown in Figure 1, includes: the main AC breaker, a status panel and controller area network (CAN) interface for service personnel, customer input/output (I/O) terminals and the keylock switch (a “Lock Out/Tag Out” switch), which shuts down the AC bus to permit MP2 maintenance by service personnel.
Thermal Management System
The thermal management system (TMS) provides a suitable operating temperature for MP2 using liquid cooling via a 50/50 mixture of ethylene glycol and water and R-134a refrigerant. The thermal bay and thermal roof, as shown in Figure 1, houses the components of the TMS. The TMS
FEI Project # 22035 Page 6 01/23/2023 22035-03R (MP2 and MP2XL FPE Report)