Bipolar plate and method for its production

C - Chemistry – Metallurgy – 25 – B

Patent

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Details

C25B 13/02 (2006.01) C25B 13/04 (2006.01)

Patent

CA 2711210

The present invention relates to a bipolar plate as well as to a method for its production. The bipolar plate preferably comprises at least two layers (2, 3) with at least two layers (2,3) comprising each at least a first and a second indentation/protrusion, where the first indentation/protrusion (2a) of the first layer (2) and the first indentation/protrusion (3a) of the second layer (3) in a completely positioned state of the layers (2, 3) engage with each other and contact each other in the plane E1 with positive fit. The second indentation/protrusion (2b) of the first layer (2) and the second indentation/protrusion (3b) of the second layer (3) engage with each other in a completely positioned state of the layers (2,3) and contact each other in the plane E2 only in sections in at least two sections (30b, 31b). The contact portions (30b, 31b) are arranged on both sides of a virtual straight line(5b), which extends in the main direction of the indentation/protrusion (3b) in the second layer (3). No positive fit between the interlocking second indentations/protrusions (2b, 3b) results in the area of the second contact area (23). The invention allows a fast, cost efficient and tailored production of bipolar plates.

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