New SOFC‐Stack Design with Parallel‐Connected Cells – Basic Concept and Joining Aspects
New SOFC‐Stack Design with Parallel‐Connected Cells – Basic Concept and Joining Aspects
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DOI：
10.1002/fuce.201400188
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发表时间：
2015-08
期刊：
影响因子：
2.8
通讯作者：
A. Lindermeir;C. Immisch;C. Szepanski;J. Hamje;A. Bentaleb;L. Dörrer
中科院分区：
文献类型：
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作者：
A. Lindermeir;C. Immisch;C. Szepanski;J. Hamje;A. Bentaleb;L. Dörrer
固体氧化物燃料电池（SOFC）技术仍然存在成本高和寿命不足等问题，部分原因是传统的串联电池组设计。为了克服这些问题中的一些，提出了具有并联连接单元的新设计。该概念基于由并联电连接的两个电池组成的盒设计的重复单元。50至60 W的堆叠模块可以通过堆叠和互连这些基本单元来构建，同样以并行模式。最后，多个堆叠模块可以串联配置，以提供合理的端电压和功率。通过流场模拟和相对于其生产率，对双电池单元的不同设计方案进行了评估。这两个，金属和陶瓷概念的细胞框架被认为是。完全避免使用玻璃密封，以提高耐用性。反应性空气钎焊（RAB）用于将电池安装在框架中。金属电池框架的概念还使用脉冲激光焊接来密封气体隔室。焊接和钎焊的初步试验表明，这些连接技术的一般可行性，并揭示了一种方法，以大量生产的双电池作为基本重复单元。流场模拟有助于确定尺寸，以确保反应物的均匀分布。
Solid oxide fuel cells (SOFC) technology still suffers from problems like high costs and insufficient lifetime, partly caused by the traditional serial‐connected stack design. To overcome some of these issues a new design with parallel‐connected cells is proposed. The concept is based on a cartridge designed repeating unit consisting of two cells, electrically connected in parallel. Stack modules with 50 to 60 W can be built up by stacking and interconnect these basic units, likewise in a parallel mode. Finally, several stack modules can be connected in serial configuration to supply reasonable terminal voltage and power. Different design options for the twin cell unit were evaluated by flow field simulations and with respect to their producibility. Both, metallic and ceramic concepts for the cell frames are considered. Glass seals are completely avoided to improve durability. Reactive air brazing (RAB) is used for mounting the cells in the frames. The concept with metallic cell frames additionally uses pulsed laser welding to seal the gas compartments. Preliminary tests on welding and brazing show the general feasibility of these joining technologies and disclose a way to mass production of twin cells as basic repeating units. Flow field simulations assist the dimensioning to assure homogeneous distribution of reactants.