METHOD FOR MANUFACTURING GRAPHITE COATED COMPOSITE BIPOLAR PLATE OF CELL

摘要

The present invention provides a method for manufacturing a graphite coated composite bipolar plate for a battery, which manufactures a composite bipolar plate by co-curing laminated carbon fiber composite material sheets and expanded graphite foils. According to the present invention, multiple carbon fiber composite material sheets and multiple expanded graphite foils are laminated alternately, and the carbon fiber composite material sheets and the expanded graphite foils are co-cured so that the expanded graphite foils are bonded to both sides of the laminated multiple carbon fiber composite material sheets. The expanded graphite foils are individually separated to form expanded graphite layers on both sides of the carbon fiber composite material sheets. Also, two expanded graphite foils are laminated between carbon fiber composite material sheets, a film is interposed between the two expanded graphite foils, and, then, the carbon fiber composite material sheets and two expanded graphite foils are co-cured. According to the present invention, the carbon fiber composite material sheets and the expanded graphite foils are alternately laminated, and the laminated carbon fiber composite material sheets and expanded graphite foils are co-cured to manufacture a composite bipolar plate, thereby improving the productivity and reducing the production costs. Furthermore, the expanded graphite layer is uniformly coated on the surface of the composite bipolar plate without a post-processing, thereby improving the quality.