A fuel cell bipolar plate manufacturing device and method

Abstract

The invention discloses a fuel cell bipolar plate manufacturing device and method, wherein the bipolar plate manufacturing device includes: a conveyor belt, a slurry coating device sequentially arranged along the conveying direction of the conveyor belt, a first heating device, a calender forming roller, The second heating device; the two ends of the conveyor belt are respectively connected to the feed roller and the take-up roller for carrying the slurry; the slurry coating device is used to coat the bipolar plate preparation slurry on the conveyor belt; the first heating device It is used for heating the slurry; the calender forming roller is used for forming flow channels on the surface of the slurry while calendering and forming the slurry; the second heating device is used for drying and curing the calendered and formed slurry. The present invention combines the two process steps of the plate making process and the flow channel processing process in the fuel cell bipolar plate manufacturing process into one process step, and the slurry for making the bipolar plate is driven by the conveyor belt into different process areas, and the corresponding processes are carried out. process steps to realize the integrated production of bipolar plates and improve production efficiency.

Description

technical field [0001] The invention relates to the technical field of fuel cells, and more specifically, to a fuel cell bipolar plate manufacturing device and method. Background technique [0002] A fuel cell is an energy device characterized by cleanliness, no pollution, low noise, and high energy conversion efficiency. The basic components of a fuel cell include electrodes, MEA components and bipolar plates. The shape of the bipolar plate is generally flat, with flow channels (grooves) about 1mm deep and 1mm wide on one or both sides, which are channels for hydrogen and oxygen to flow. The bipolar plate has the functions of collecting current, channeling reaction gas and separating reducing agent and oxidizing agent, and its performance depends on material properties, flow channel design and processing technology. [0003] Existing bipolar plates are divided into graphite plates, metal plates and graphite-based composite plates. Among them, the graphite plate adopts the...

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Problems solved by technology

[0003] Existing bipolar plates are divided into graphite plates, metal plates and graphite-based composite plates. Among them, the graphite plate adopts the process of engraving and dipping, the metal plate adopts the process of stamping and multiple anti-corrosion treatment, and the graphite-based composite plate adopts expanded graphite and polymer. Molding into a flat plate and then making bipolar plate runners by secondary machining. The existing three methods are all step-by-step processing methods in terms of technology, that is, there is no continuity from the previous step to the next step, resulting in Process production efficiency is low and product cost is high

In addition, the existing graphite-type bipolar plates (including expanded graphite-based composite plates) have strong corrosion resistance, but poor physical properties and low mechanical strength. Therefore, the biggest problem with the stack made of graphite-type bipolar plates is that they are large in size and low in energy. Low density; while the metal type bipolar plate has good mechanical strength and is easy to process, but the surface is easy to corrode, and the anti-corrosion treatment process is complicated and the cost is high

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