Exploration into the Flame-Retardant Effect of Flame Retardants on Paraffin-Stearic Acid Phase Change Materials Based on a Cone Calorimeter.

Efficient battery thermal management technology is of great significance to the safe operation of lithium-ion batteries. In this study, the paraffin-stearic phase change material in the cooling of the phase change material in a lithium-ion battery thermal management system was taken as the study object. Then, the flame-retardant effects of Zn3B6O12·3.5H2O, aluminum hydroxide, and chlorinated paraffin with different mass percentages were experimentally studied via a cone calorimeter. The results revealed that after adding different flame retardants, the peak CO2 production rate of paraffin-stearic acid is reduced. After adding these three flame retardants, the material exhibited different flame-retardant effects in terms of carbon dioxide production rate, total heat release, and mass percentage remaining. Through the entropy weight method, it can be calculated that when 20% by mass of Zn3B6O12·3.5H2O, Al-(OH)3, and chlorinated paraffin are added respectively, the comprehensive scores of the samples are 0.76, 0.71, and 0.23, respectively. Therefore, the priority order of flame-retardant effects on paraffin-stearic acid is Zn3B6O12·3.5H2O > Al-(OH)3 > chlorinated paraffin.