The simulation of thermal runaway in new energy vehicle batteries involves multiple physical fields, including the electrochemical reactions within the cell, gas flow within the module and battery pack, as well as heat and mass transfer. These factors interact and collectively impact the battery's performance and safety. 

By conducting an in-depth study of the temperature distribution inside the battery pack, potential thermal runaway risks can be identified, enabling engineers to preemptively detect critical hot spots that may lead to failures. 

Additionally, the simulation can evaluate the effectiveness of different cooling strategies, optimizing battery design to enhance stability under high load conditions and extreme environments. 

This comprehensive analysis not only helps improve the overall performance of the battery but also ensures its reliable operation under various conditions and compliance with relevant safety standards, thus supporting the safety and sustainability of new energy vehicles.