Abstract: In order to improve the comprehensive effect of thermal runaway suppression and thermal management heat dissipation of battery modules, this study designed a thermal management system with phase change material aerogel sandwich structure between batteries and set up different thickness layout forms. The comprehensive benefits of each layout were obtained and compared by classifying the data and performing Min-Max normalization and giving different weights to accumulate. The results show that the pure aerogel is the best for restraining the uncontrolled heat transmission. Compared with air cooling, it can extend the time of the last battery in the module to generate heat out of control, but the heat dissipation effect of battery thermal management is significantly worse; For strengthening heat management and heat dissipation, pure phase change material arrangement has the best effect. Compared with air cooling, it can reduce the maximum temperature of battery in a discharge cycle by more than 20 ℃, but its suppression of heat runaway propagation is significantly weaker than pure aerogel arrangement; For the comprehensive benefits of thermal runaway and thermal management, the PCM-aerogel-PCM layout is more widely applicable than other layout forms. It ensures the effect of restraining thermal runaway of the battery while strengthening the heat dissipation of the battery during normal operation to maximize the overall benefits.

Key words: battery thermal runaway； battery thermal management, phase change materials, aerogel