Bipolar Plate Aperture Layout for Compact Fuel Cell Stacks
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Solution Overview
Problem
Fuel cells with bipolar plates and end plates are prone to bending stresses and require significant installation space due to external connecting means, leading to a non-compact design.
Innovation Solution
The fuel cell design incorporates bipolar plates with apertures, including mounting and flow apertures, allowing connecting means to pass through, and uses sealing elements to secure components while minimizing space and stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external connecting means are used to fix bipolar plates and end plates, then the components can be securely fixed, but the installation space requirement increases and bending stresses occur
Solution Approach 1:
The connecting means is integrated into the bipolar plate structure itself, merging the functions of structural support and connection. The bipolar plate with built-in connecting means eliminates the need for separate external connecting components, achieving secure fixation while reducing installation space requirements.
Solution Approach 2:
The connecting means is nested within the bipolar plate structure, where the connecting elements are positioned inside or as part of the bipolar plate. This nesting approach allows the connection function to be embedded within the existing structure, reducing overall space requirements while maintaining secure fixation.
2Reliability
If external connecting means are used to fix bipolar plates and end plates, then the components can be securely fixed, but bending stresses are exposed to the plates
Solution Approach 1:
The connecting means is merged with the bipolar plate structure, creating an integrated system where the connection elements are part of the plate itself. This integration distributes stresses more evenly throughout the structure, reducing concentrated bending stresses on the plates while maintaining secure fixation.
Solution Approach 2:
Instead of using external connecting means that apply force from outside the bipolar plate structure, the connecting means is designed to work from within or as an integral part of the plate. This inversion of the connection approach reduces bending moments and stress concentrations on the plate surfaces.
3Stability of the object's composition
If bipolar plates are arranged in stacks with external connecting means, then the design can be compact, but the installation space requirement increases
Solution Approach 1:
The connecting means for stacking bipolar plates is merged into the plate structure itself, eliminating the need for separate external connectors. This integration maintains the stability of the stack arrangement while reducing the overall installation space required for all connecting components.
Solution Approach 2:
The bipolar plate with integrated connecting means serves multiple functions: it provides structural support, enables stacking, and facilitates connection of adjacent plates. This multi-functionality maintains stack stability while reducing the space required for dedicated connecting components.
Data Source
AI summary
Fuel cell (1) comprising a bipolar plate (210), in particular a plurality of bipolar plates (210), and/or comprising a connecting means (9), in particular a plurality of connecting means (9), wherein the bipolar plate (210) extends in a longitudinal direction (L) and in a width direction (B), wherein the longitudinal direction (L) and the width direction (B) are in particular perpendicular to one another, wherein the bipolar plate (210) has a plurality of apertures (240), wherein the apertures (240) have an outer contour, wherein the outer contour of the apertures (240) is formed in particular in each case by a mounting aperture (242) and at least one flow aperture (244), wherein the mounting aperture (242) advantageously forms a circular segment-shaped part of the outer contour of the aperture (240), and wherein the mounting aperture (242) or the aperture (240) is designed to receive the or a connecting means (9).