双极板是质子交换膜燃料电池的关键部件之一,而且是影响电池组性价比的重要因素,双极板的微尺度化给其成形带来了难度。提出了双极板累积成形新方法,在自行研制的累积成形实验装置上,对不同热处理状态下(常温,260,360和450℃)的铝合金3003板料(11 mm×11 mm×0.6 mm)进行了微型直流道成形实验,研究了不同热处理温度对成形力、成形深度以及回弹率的影响规律。结果显示综合考虑成形力以及流道成形深度的影响因素,采用完全退火的双极板板料可以提高成形性能和成形精度。
Bipolar plate was one key component of proton exchange membrane fuel cell (PEMFC),and it was al-so an important factor which affects cost performance of battery stack.It was difficult to form flow channel of bipolar plate under the micro scale.This paper puts forward the method of accumulative,and set up the corre-sponding experimental apparatus,selecting aluminum alloy 3003 sheet metal with the size of 11 mm×11 mm× 0.6 mm as bipolar plate,and conducting heat treatment on sheet metal under room temperature and 260,360, 450 ℃ four different temperatures,then we can complete straight flow channel by forming device.The paper studies the impact of different heat treatment temperatures on forming force,forming depth and the resilient rate.Results show that we can consider the influence factors of forming force and flow channel forming depth, and adopting sheet metal after the process of completely annealing in the later forming,it can improve the forming performance and forming accuracy.
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