Bipolar plate with media regulation and fuel cell stack
AssigneeAudi AG
InventorsMarkus Gretzer, Norbert Kluy
Life of this patent
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Abstract
A bipolar plate for a fuel cell is provided having an active region and a marginal region surrounding the active region, and having a first media guide having a first passage and a second media guide having a second passage, and having a media duct extending through the active region and fluidically connecting the first passage to the second passage, wherein the first passage and/or the second passage is associated with a diaphragm, which is adjustable by an actuator to establish or to regulate the flow cross section of the first passage and/or of the second passage. A fuel cell stack having a fuel cell with such a bipolar plate is also provided.
Claims9
A fuel cell system, comprising:
- a bipolar plate having an active region and a marginal region surrounding the active region, and the bipolar plate comprising:
- a first media guide having a plurality of first passages;
- a second media guide having a plurality of second passages;
- and
- a plurality of media ducts extending through the active region and fluidically connecting the plurality of first passages to the plurality of second passages;
- an actuator;
- and
- a respective diaphragm associated with each of at least two of the plurality of first passages or with each of at least two of the plurality of second passages, wherein each diaphragm is adjustable by the actuator or another actuator to dynamically change a respective flow cross section of the at least two of the plurality of first passages or the at least two of the plurality of second passages during operation of the fuel cell system.
Dependencies are inferred from the claim text.