Study on critical ambient temperature of cylindrical battery

Аннотация

In order to study the thermal safety of cylindrical battery and solve the three-dimensional cylindrical battery thermal explosion problem, a common thermal explosion physical model of cylindrical battery and threedimensional thermal explosion mathematical model of cylindrical fireworks with non-uniform heat dissipation of the lateral surface were established for the first time. By applying the theory of heat transfer, the boundary conditions of cylindrical battery were simplified reasonably. The seven-point difference method was introduced to disperse the model. The three-dimensional numerical program was written by homotopy continuation method and Newton iteration method based on Matlab. Comparison of twodimensional numerical solutions obtained by taking / = 0and classical solutions proved the accuracy of model. Acommon kind of fireworks was calculated in this paper.When this single cylinder firework stored individually, thecriterion of thermal explosion is 1.796, and critical ambient temperature is 450.484 K.