H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/02 (2006.01) H01M 8/04 (2006.01) H01M 8/24 (2006.01)
Patent
CA 2524967
The invention relates to a bipolar cooling plate module for use in fuel cell stacks. The module comprises an anode-side terminal plate and a cathode-side terminal plate, in which at least one of the surfaces of the two terminal plates facing towards one another contains coolant channels. The two terminal plates are fixed to one another in situ by an integral sealing element applied in an injection-moulding process that passes through and/or encompasses both terminal plates. The sealing element contains a sealing bead that surrounds the coolant distribution structure and seals the gap between the cooling surfaces of the two terminal plates, as well as a sealing bead at each of the interfaces with the anode and cathode. These three sealing beads are connected to one another in a material-locking manner via elements of the same material passing through the terminal plates and/or surrounding the edge surfaces, and thus inseparably hold the terminal plates together. A compressible two-dimensional conducting element is inserted between the terminal plates, which extends only over the region of the cooling surfaces enclosed by the sealing groove, in which the coolant distribution structure is located. The two-dimensional element has a compression reserve that is sufficient to compensate for the shrinkage in thickness caused by cooling, of the sealing bead situated between the cooling surfaces.
Fetherstonhaugh & Co.
Sgl Carbon Ag
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