Method for manufacturing a bipolar plate

Abstract

Method for producing a bipolar plate (10, 51) comprising the steps of: primary mechanical forming with a forming tool (79, 80, 81, 82) of the first raw plate (83, 85) to a first plate (64, 85) as a first plate element (85) by applying a primary forming force to the first raw plate (83, 85) with the forming tool (79, 80, 81, 82) and / or primary mechanical forming with a forming tool (79, 80, 81, 82) of the second raw plate (84, 86) to a second plate (65, 86) as a second plate element (86) by applying a primary forming force to the second raw plate (84, 86) with the forming tool (79, 80, 81, 82), stacking the first plate element (64, 85) and of the second plate element (65, 86) together, so that inner surfaces (66) of the first and second plate elements (85, 86) lie on top of each other at a contact area (68), producing at least one welded joint (69, 70, 71,72) between the first and second plate elements (85, 86), such that the bipolar plate (10, 51) is formed from the first and second plate elements (85, 86) connected to each other by the weld connection (69, 70, 71, 72), wherein the first plate element (85) and / or the second plate element (86) is additionally secondarily formed by heating the first and / or second plate element (85, 86) to reduce the necessary secondary forming force and with a secondary forming force the secondary forming is carried out in the heated state, so that after cooling the first and / or second plate element (85, 86) the first and / or second plate element (85, 86) has been secondarily formed.

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