Investigation of failure processes in porous battery substrates: Part II--simulation results and
Investigation of failure processes in porous battery substrates: Part II--simulation results and
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多孔电池基板失效过程的研究：第二部分——模拟结果和
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
X. Cheng
中科院分区：
文献类型：
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作者：
C. Wang;X. Cheng
模型的镍-金属氢化物（NiMH）电池基板的运输和机械性能的演变。在本系列的第一篇论文中，通过实验对这些材料的导电损耗和机械性能的增强进行了量化。这些被定量地证明是相关的观察到的形态变化的基板材料。在这里，这些结构的变化的演化假设，沿着的简化近似的真实的材料的微观结构（多孔纤维/粉末镍网络）与一个易于处理的模拟几何形状（多孔纤维网络）。传输和力学模型，然后与实验结果进行比较，随机排列的纤维近似为导电梁连接的弹性扭转弹簧。定量和定性的协议与模型。所提出的方法的局限性也进行了讨论，沿着与几何分析的简化的后果。
Models are presented for the evolution of transport and mechanical properties of nickel-metal hydride (NiMH) battery substrates. In the first paper in this series, conductive losses and enhancement of mechanical properties in these materials were quantified experimentally. These were quantitatively shown to be related to observed morphological changes in the substrate materials. Here, an evolution hypothesis for changes in these structures is presented, along with a simplified approximation of the real material microstructure (porous fiber/powder nickel network) with a tractable simulation geometry (porous fiber networks). Transport and mechanics models are then compared with experimental results, with stochastically-arranged fibers approximated as conductive beams connected by elastic torsion springs. Both quantitative and qualitative agreement are found with the models. Limitations of the approaches proposed are also discussed, along with the consequences of the simplifications of geometry for analysis.