提升某高体积比能量、热散失严重热电池工作时间研究

Study on improving the working time of a high volume specific energy and serious heat loss thermal battery

为攻克某热电池高体积比能量、散热严重的技术难点,本文通过选用不同锂含量的LiB负极、电解质类型、调节硫化物正极的配比,并改变热电池壳体外形设计来减少热散失等方法装配热电池进行性能实验研究,同时进行了稳态和瞬态热学仿真计算分析及热电池试验验证。结果表明,选择锂含量为55%的LiB合金作为负极,使用低熔点电解质,选择FeS 2和CoS 2比例为1∶1的MS 2复合正极以及减小壳体散热面积可以有效提升热电池工作时间,为小体积自带外结构体的热电池设计提供了一种指导思路。

In order to overcome the technical difficulties of high volume specific energy and serious heat dissipation of thermal battery,some thermal batteries were assembled for performance experimental research by selecting LiB negative electrode with different amount of lithium,different kinds of electrolytes,adjusting the ratio of sulfide anode material,and also changing the shape design of the thermal battery shell to reduce heat loss,and then it was verified by simulation analysis and experiment.The result showed that the working time of the thermal battery could be effectively improved by selecting LiB alloy with 55%lithium content as negative electrode,using low melting point electrolyte,MS 2 composite anode material with the ratio of FeS 2 and CoS 2 of 1∶1,and reducing the heat dissipation area of shell.The conclusion was expected to provide a guiding idea for the design of small thermal battery with external structure.