基于等效电路模型锂硫电池模组热仿真

Thermal Simulation of Lithium-sulfur Cell Module Based on RCR Equivalent Circuit Model

随着比能量要求的提升,锂硫电池作为下一代高比能量电池,受到越来越多的关注,锂硫电池以及模组的性能研究受到更多青睐。但是由于锂硫电池界面接触差导致的内阻大、工作温升高、一致性差等问题也成为限制其应用的重要原因。为了研究锂硫电池模组的热性能,文章基于传统锂离子电池的等效电路模型,建立了锂硫电池的数学模型,在此基础上通过应用三维软件对锂硫电池模组的热性能进行仿真。通过热仿真结果与试验测试数据的对比,可以看到热仿真分析的误差较小,说明该模型的精度较高,可以作为实际热性能研究的参考。在此基础上优化模组内部传热设计,实现了较高的温度一致性,为后续锂硫电芯及其模组的热性能研究提供了比较好的基础。

With the improving requirement of high energy density,lithium-sulfur batteries as the next generation of high energy density batteries have attracted more and more attention,and the performance research of lithium-sulfur cell module is becoming popular.However,due to the large internal resistance caused by the poor interface contact of the lithium-sulfur battery,the operating temperature rises,the poor consistency and other issues become important reasons for limiting its application.The equivalent circuit model of the traditional lithium-ion battery,the mathematical model of the lithium-sulfur battery is established,and the thermal performance of the lithium-sulfur battery module is simulated by the application of three-dimensional software.It can be seen that the error of thermal simulation analysis is smaller,indicating that the accuracy of the model is higher,and it can be used as a reference for actual thermal performance research.It provides a good foundation for the subsequent research on the thermal performance of lithium-sulfur batteries and their modules.