Fuel Cell Separator Receiving Structure for Misalignment Tolerance
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Solution Overview
Problem
Existing fuel cell separators face issues with over-compression of bead parts due to misalignment during stacking, leading to compromised sealing properties and performance degradation.
Innovation Solution
A stacked structure body of fuel cell separators is designed with bead and receiving parts that protrude in the same direction, arranged such that their linear extension directions are non-parallel and partially overlap, ensuring stable contact even with misalignment, thereby preventing over-compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a receiving part is provided around the bead part to prevent over-compression, then the bead part is protected from damage, but misalignment during stacking causes the receiving parts to fail to contact properly, reducing their effectiveness
Solution Approach 1:
The receiving part is designed with an asymmetric top surface where the distance from the center to one end is greater than the distance to the other end. This asymmetric geometry creates a larger contact area on one side, ensuring that even when misalignment occurs during stacking, the receiving parts from opposing separators can still make contact and provide the necessary reaction force to prevent bead part over-compression.
Solution Approach 2:
The receiving part is pre-configured with an asymmetric top surface design before stacking occurs. This preliminary geometric configuration ensures that during the stacking process, even with potential misalignment, the larger contact area side is positioned to maximize contact probability with the opposing receiving part, thereby maintaining sealing reliability without requiring high precision stacking.
2Force
If the top surface of the receiving part is made flat to distribute reaction force, then both end sides become high reaction force portions, but misalignment causes these portions to miss contact, reducing reaction force effectiveness
Solution Approach 1:
Instead of a symmetric flat top surface that creates two equal high reaction force portions at the ends, the invention employs an asymmetric top surface where one end is positioned farther from the center. This asymmetry concentrates the high reaction force portion on one side, making the contact more tolerant to misalignment since only one critical contact point is needed to maintain effective reaction force.
Solution Approach 2:
The top surface of the receiving part is designed with non-uniform geometry, creating a localized high reaction force area at one end rather than distributing it symmetrically. This local quality enhancement ensures that the critical reaction force is maintained even when misalignment occurs, as the asymmetric design increases the probability that the high reaction force portion will contact the opposing receiving part.
Data Source
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AI summary
There is provided a stacked structure body of a fuel cell separator capable of securing a stable reaction force at an opposing receiving part and effectively restraining over-compression of a bead part even when a misalignment of stacking occurs in the stacked separators. The stacked structure body of a fuel cell separator includes a first set 11 having one separator 12 and a second set 21 having another separator 22, one separator 12 and another separator 22 have bead parts 14 and 24, and receiving parts 16 and 26 to receive an over-compression load of each of the bead parts 14 and 24, respectively, one separator 12 and another separator 22 are oppositely arranged such that the surfaces on the protruding sides of the bead parts 14 and 24 and the receiving parts 16 and 26 face each other, the linearly extending direction of the receiving part 26 of one separator 12 and the linearly extending direction of the receiving part 26 of another separator 22 are configured to be non-parallel, and the opposing receiving parts 16 and 26 are configured to partially overlap each other.