Tesla Megapack 2 and Megapack 2XL 2023

Page | 027

Figure 12 Side and back target battery module temperatures during UL 9540A unit level fire testing.
Exposure Surface Temperatures
As shown in Table 5, surface temperatures on exposures 5 ft (1.52 m) to the side (instrumented wall) and 8 ft (2.44 m) directly in front of the initiating MP2 cabinet (front target) did not exceed 97°C (175°F) above ambient.
Table 5 Exposure Surface Temperatures
Front Target Surface 16.8°C (62.2°F) 11.3°C (52.3°F) 5.5°C (9.9°F) Instrumented Wall Surface 25.9°C (78.6°F) 20.4°C (68.7°F) 5.5°C (9.9°F)
These temperatures were recorded directly in front of the initiating battery module and at the instrumented wall, as shown in Figure 11. As plotted in Figure 13, the surface temperature of the front target gently rose throughout the 21⁄2-hour test from a starting temperature of 11.3°C
FEI Project # 22035 Page 25 01/23/2023 22035-03R (MP2 and MP2XL FPE Report)
Location
Maximum Temperature Recorded
Ambient Temperature Recorded by the TC at the Start of Test
Temperature Rise Above Ambient