下压量对微型燃料电池双极板成形回弹影响.docVIP

下压量对微型燃料电池双极板成形回弹的影响 XX （江苏大学机械工程学院 学号 班级） 摘要：双极板是微型燃料电池关键部件之一，微尺度下的高精度极板流道给其成形方法带来了难度，本文针对双极板的特点提出了累积成形方法。在介绍微累积成形工作原理的基础上搭建了相应的实验装置，选取0.165mm和0.27mm板厚的成形区域mm×7mm铝合金板作为双极板毛坯，进行了累积成形试验，分析其成形规律，研究了不同下压量对的影响。The study of accumulate forming mechanism in micro fuel cell bipolar plate XXX (Jiangsu University, ......) Abstract: The bipolar plate is a key component of micro fuel cell. It is difficult to form the high precision flow channel of bipolar plate under the micro scale. In this paper, we present the method of accumulative forming for the characteristics of bipolar plate. On the basis of introducing the principle of micro-accumulation forming, we set up the corresponding experimental apparatus, selecting 7mm×7mm×0.165mm and 7mm×7mm×0.27mm aluminum plate as the bipolar plate blanks to do the accumulated forming test. We analyze the shaping law and the influence of different amount of underdraught on the forming depth and resilience rate. The results show that when the plates has different underdraught, the forming depth-the displacement curve represents that the forming depth is bigger at starting point and end point, forming depth is becoming smaller when close to middle area, and forming depth also increases along with the amount of vertical underdraught, the curves also gradually become gently; at the same time, the trend of resilience rate-the displacement curve is opposite to the forming depth-the displacement curve, resilience rate is smaller at starting point and end point as the middle area resilience rate is bigger. We can also find that the resilience rate is bigger and the change of the resilience rate curve is gentle when the vertical underdraught increases. Keywords: Micro fuel cell; bipolar plate; accumulated forming; shaping law 0 引言 国际能源紧缺是清洁便利替代能源开发的主要因素，目前太阳能、风能、水力发电、生物能源、地热发电等无法应用于移动及便携式电子设备。燃料电池被认为是21世纪首选的洁净、高效的发电技术，国内外政府、科研院所和各大公司都对其尤为重视。(速启动、零排放等特点，被认为是电动车、潜艇和各种可移动电源的最佳候选者。双极板是PFMFC的核心部件之一，占电池组质量和成本的很大部分，两面为加工流道，]。双极板流道的设计与加工对PEMFC性能、效率以