Machining method of miniature metal bipolar plate based on plasticine support

Abstract

The invention relates to the field of a miniature fuel battery, and particularly relates to a machining method of a miniature metal bipolar plate based on a plasticine support. The machining method comprises the steps of arranging the plasticine support below a metal plate, paving a layer of PVC (Polyvinyl Chloride) plastic film with the thickness of less than 5mum on the upper surface layer of the plasticine support, controlling the motion path and speed of a micro-forming die head, and finishing the forming of the whole metal bipolar plate by the micro-forming die head through accumulation of plastic forming of a small region, wherein the plasticine comprises 70-80% of clay powder, 3-5% of liquid paraffin, 3-5% of glycerol, 2-3% of vaseline, 3-6% of talcum powder, 0.5-1.0 of alpha-SiC whisker reinforcing agent and 3-5% of water, wherein the whisker reinforcing agent has the particle size of 15-20mum and the whisker size of 150-200mum. The machining method solves the problems that when no support is arranged, the machining accuracy is low, and when an elastic support is added, resilience exists and the shape of the bipolar plate are affected, and has the advantages of high machining accuracy and low cost.

Description

technical field [0001] The invention relates to the field of micro fuel cells and micro-processing, and specifically refers to a micro-metal bipolar plate processing method based on plastic clay supports. By adding plastic clay supports under the metal plate, a layer of thickness less than 5μm PVC plastic film, control the movement direction, path and processing speed of the micro-forming die head to process the flow channel of the metal sheet, the micro-forming die head completes the forming of the entire plate through the accumulation of plastic forming in a small area, which is suitable for ultra-thin metal The micro-forming of bipolar plates has high processing precision and low cost. Background technique [0002] Due to people's awareness of international energy shortages and increasingly serious environmental pollution, it is an inevitable trend to develop clean and convenient alternative energy sources. A fuel cell consists of a catalyst-containing anode, a cathode, ...

AI Technical Summary

Problems solved by technology

[0003] 1. If no die or no support is used when processing metal bipolar plates, the resistance of different positions in the metal plate processing area will be different due to the blanking area during processing, and there will be rebound in the middle of the plate, which will reduce the processing accuracy

[0004] 2. If a micro-die is used as a support, the corresponding die must be manufactured before the flow channel is processed, which increases the processing steps and cost, and also increases the complexity of the processing process

[0005] 3. If the area of ​​the processed metal plate is small, the adjacent flow channels will affect each other during the processing of the plate flow channel, which reduces the processing accuracy of the metal bipolar plate

[0006] 4. If a soft mold such as rubber is used as a support, the soft mold support will rebound, which will seriously affect the shape and accuracy of the processed flow channel of the metal bipolar plate

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