储能钠硫电池保温层优化设计

为解决钠硫电池非真空保温结构存在的厚度过大、寿命短、可靠性不佳等问题,利用多层平壁导热理论建立保温结构数学模型,采用有限元分析软件ANSYS进行实体建模与数值模拟,分析不同性能保温材料对实际性能的影响,并提出一种通过了实验验证的钠硫电池保温结构优化设计方案.结果表明,优化方案满足了保温结构设计的需求;通过应用新型保温材料使保温结构厚度缩减了37.5%,从而减小了整体体积与重量;总结出根据材料属性与热阻安排保温材料布局的思路,保证了各保温材料在工作条件下的安全可靠.这对未来钠硫电池以及其他装置的保温结构设计与优化提供了技术参考.

Optimal design for thermal insulation layers of energy-storage sodium-sulfur batteries

In order to solve the problems of over large thickness, short life, poor reliability of non-vacuum thermal insulation structure for sodium-sulfur battery, the mathematical model was established by thermal conductivity theory of multi-level insulation layer structure, solid modeling and numerical simulation were done by finite element analysis software ANSYS, the impact of different thermal insulation materials on the actual performance was analyzed, and an optimal design by the actual test validation was proposed. The results indicate that the optimization design meets the design requirements, decreases the total thickness of thermal insulation structure by 37.5% by applying new thermal insulation materials, and then reduces the overall size and weight of the structure. Furthermore, the layout method of the thermal insulation materials arranged according to the material properties and thermal resistance was summarized, which ensures each material is safe and reliable under working conditions. Research results can provide technical references in design and optimization of the insulation structure for sodium-sulfur batteries and other devices in the future.