Patent ID: 7150846
Filing Date: 2006-12-19
Classification: H01M,Y02E,Y02P

Abstract:
1. A method of fabricating a bipolar plate for fuel cell stacks, wherein the bipolar plate includes a circumferential frame made of an electrically non-conductive material and further includes an inner bipolar plate region which is enclosed by the frame, wherein the inner bipolar plate region is made of the electrically non-conductive material and comprises channels for gases and, optionally, for coolants, said method comprising the following procedural steps: A) inserting an electrically conductive fabric, which essentially extends in two dimensions, into a tool for fabricating the bipolar plate, the fabric being inserted such as to be essentially perpendicularly to the orientation of the bipolar plate to be fabricated and extending on both sides beyond the bipolar plate to be fabricated, B) introducing of the electrically non-conductive material into the tool in order to form the frame and the inner bipolar plate region, the electrically non-conductive material extending through the fabric, thereby containing the fabric, C) removing a molded bipolar plate from the tool, and D) bending back on both sides the fabric which extends beyond the inner bipolar plate region so as to cause the fabric to cover the inner bipolar plate region made of the non-conductive material.