PROCEDE DE FABRICATION D'UNE PLAQUE BIPOLAIRE POUR PILE A COMBUSTIBLE ET PLAQUE BIPOLAIRE OBTENUE

摘要

The invention relates to a method of producing a bipolar plate for a fuel cell of the type that comprises an ion exchange membrane. The inventive method comprises the following steps consisting in: disposing a polymer membrane (3) comprising at least two polymer layers (4, 5) having different melting points on a rigid support which is equipped with a plurality of holes; disposing a layer (6) of an electrically-conductive fibrous material on the aforementioned polymer membrane; passing fibres (10) of the fibrous material through the polymer membrane using a needling method; and heating the assembly to an intermediate temperature between the two polymer melting points, such as to seal the polymer membrane (3) at the points through which the fibres pass, by filing the corresponding voids (9) with the polymer having the lower melting point.