Thermal runaway (TR) is a thermal disaster in the lithium-ion battery (LIB). The TR hazard in the LIBs with different battery characteristic and under different TR triggering method is distinctive, and the absence of its systematic assessment method has long been an obstacle of the development of standardized TR inhibition. This study has investigated the TR hazard assessment parameters (HAPs) in the batteries of different rated capacity R_c and battery number N under different TR triggering method, and raised a novel method for TR hazard quantification based on these HAPs. The results show: (1) under different triggering method, the HAPs are increased with the increase of overcharging rate C_r and the decrease of heating power P_h, but not explicit with the change of punching speed P_s, and increased with C_r in most cases; (2) the quantified TR hazard H_TR-q is greater in the cases of overcharging and punching, and is 1.52 times greater in the confined space under the same case in the open space. Besides, The R_c and H_TR-q form a quadratic function relationship, and N and H_TR-q a linear relationship. Moreover, a computing model of H_TR-q is proposed with the input of, self-characteristics of battery S_c and TR triggering intensity I_t, which exhibits the average error of 6% approximately. This is expected to become a novel and objective method in the hazard assessment of TR in LIBs.

Self-characteristic of the battery,Lithium-ion battery,Thermal runaway,Triggering intensity,Quantified hazard assessment