一种热电池用高精度快速仿真技术

A kind of high-accurate and fast simulation technology for thermal battery

建立了一种基于二维轴对称的热电池单元电池仿真模型,模拟计算了高低温条件下(+60和-30℃)的热电池电激活时间以及表面温度变化过程。与三维模型相比,该模型在保证几何细节高度完整的同时,实现了仿真速度的飞跃,模型运算时间小于5 min。与实测结果对比,该模型仿真结果与实测值接近,激活时间仿真误差在3.5%以内,表面温度实测曲线与仿真结果几乎重合,表明该模型准确性高,具备工程指导意义。

A 2 D-axisymmetric thermal model of thermal battery was developed for simulating the activation time of thermal battery,and the surface temperature evolution at the ambient temperature of +60 and -30℃.Compared with 3D model,the geometry of this model was more integrated,the solution speed was improved,and the solution time of the model was less than 5 min.The simulated values were closed to the experiment results,the error of activation time was within 3.5% and the surface temperature curves of experiment almost overlapped with the simulation results.The results show the thermal model has high accuracy and could provide reference for actual production.