金属双极板是质子交换膜燃料电池(PEMFC)的关键部件.精密冲压成型具有高生产效率、低成本、较好成型精度等优点,是金属双极板的主要制造技术.建立了金属板冲压有限元仿真计算模型,模拟了冲压成型后双极板表面变形、流道深度不一致等缺陷.在压力机上冲压制造了流道宽度1.1 mm、深度0.3 mm的金属双极板样件,并采用超景深显微镜和轮廓仪测量了双极板表面微流道形貌.测量结果表明冲压成型的双极板表面出现明显的凸出变形,且横截面流道深度不均匀,测得流道深度差值最大为0.04 mm.%Metal bipolar plate is a key component of the proton exchange membrane fuel cell(PEMFC). Precision stamping with high production efficiency, low cost, high accuracy, etc., is the main manufacturing technology of metal bipolar plate. The finite element model of metal plate stamping was established, and the deformation of the bipolar plate and the inconsistency of channels were simulated. The metal bipolar plate sample with channels of 1.1 mm width and 0.3 mm depth was stamped on the press machine. The micro channel morphology of the bipolar plate was measured by the super depth microscope and the profiler. The measurement result shows that the surface of the bipolar plate is obviously convex and deformed, and the depths of the channels are not uniform, and the maximum difference of the depths is 0.04 mm.
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