Fuel Cell Microseal Curved Surface Buckling Resistance

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Solution Overview

Problem

Conventional fuel cell microseals face issues with buckling, leading to inconsistent seal contact and increased risk of leaks due to misalignment and high manufacturing costs, particularly in high-temperature environments.

Innovation Solution

A microseal design featuring a substantially horizontal surface with first and second vertical surfaces and a contoured surface, which maintains its orientation and flexibility under compression, ensuring consistent contact between metal beads and redistributing load to increase the buckling load of the sealing joint.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional microseal designs are used, then manufacturing is simpler, but buckling occurs leading to inconsistent seal contact and increased leak risk

Engineering Contradiction:

Improveseal contact consistencyVSAvoidmicroseal structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The microseal features a contoured surface with a radius of curvature that transitions from a first value at the bead interface to a second value at the opposing surface. This curved geometry distributes compressive loads more evenly across the seal interface, preventing buckling and maintaining consistent seal contact under compression, thereby resolving the contradiction between reliability and structural simplicity.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The invention modifies the geometric parameters of the microseal by introducing a contoured surface with specific radius of curvature values. This parameter change transforms the flat microseal design into a curved one, which fundamentally alters the stress distribution characteristics and prevents buckling while maintaining manufacturing feasibility.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If conventional microseal designs are used, then manufacturing cost is lower, but misalignment and buckling increase leak risk

Engineering Contradiction:

Improveseal contact consistencyVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The contoured surface geometry with defined radius of curvature provides inherent alignment tolerance and buckling resistance, allowing the microseal to maintain reliable seal contact even with manufacturing variations. This geometric solution achieves improved reliability without requiring complex active control mechanisms, balancing manufacturing ease with performance reliability.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Manufacturing precision

If the microseal is compressed, then seal contact is improved, but buckling occurs leading to misalignment

Engineering Contradiction:

Improveseal contact precisionVSAvoidmicroseal orientation

Core Design Contradiction:

Manufacturing precisionVSStability of the object's composition

Solution Approach 1:

The contoured surface with its curved geometry inherently resists buckling under compression by distributing loads across the curved surface. This maintains the microseal's horizontal surface orientation and prevents misalignment, allowing the seal to achieve precise contact without compromising structural stability during compression.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The contoured surface geometry acts as a pre-designed structural feature that anticipates and prevents buckling before it can occur. The curved geometry provides inherent stability against compressive loads, cushioning against the development of misalignment and maintaining precision throughout the compression process.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The new microseal design enhances seal contact robustness against misalignment and buckling, reducing the risk of leaks and improving manufacturing efficiency by maintaining consistent contact and load distribution, thus enhancing the reliability and durability of fuel cell seals.

Implementation Method 1

The contoured surface and the substantially horizontal surface for each microseal define a microseal thickness which may vary along the width of the microseal

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

a substantially horizontal surface with first and second vertical surfaces and a contoured surface, which maintains its orientation and flexibility under compression

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11431002B2Fuel cell microseal and a method of manufacture thereof

Publication Date: 2022.08.30 GM GLOBAL TECHNOLOGY OPERATIONS LLC

AI summary

A microseal for a metal bead seal joint includes a substantially horizontal surface, first and second substantially vertical surfaces disposed on opposite ends of the substantially horizontal surface, and a contoured surface operatively configured to adhere to a portion of a metal bead. The contoured surface may be disposed opposite the substantially horizontal surface and may be integral to the first and second substantially vertical surfaces. The substantially horizontal surface may be operatively configured to substantially maintain its horizontal surface orientation in both a compression state and a non-compression state.