Functional Layer Gas Permeation Analysis for Defect Detection

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Solution Overview

Problem

Existing methods for analyzing electrochemical cell and sensor applications fail to reliably detect defects within the functional layers, such as holes, density differences, and cracks, as they are limited to visual inspections of the visible surface.

Innovation Solution

A method involving conveying a predefined amount of test gas to a functional layer's surface and quantitatively determining the gas that passes through using a detection unit on the opposite surface, with a test gas chamber having a defined longitudinal opening and variably adjustable transverse width, allowing for continuous analysis of the layer's integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If visual checks are used to detect defects, then the method is simple and quick, but defects inside the layers remain undetected

Engineering Contradiction:

Improvesimplicity of detection methodVSAvoiddefect detection reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent uses gas flow through the functional layer to detect defects. A test gas is introduced on one side of the layer and its passage is measured on the other side, enabling detection of internal defects like holes and cracks that visual inspection cannot detect.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The patent replaces visual inspection methods with a gas flow measurement system. Instead of using optical detection, it employs pneumatic principles where test gas permeation through the layer indicates the presence and location of defects.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If a closed test gas chamber is used, then gas passage can be measured, but diffusion losses increase and measurement accuracy decreases

Engineering Contradiction:

Improvegas passage measurement accuracyVSAvoidgas diffusion loss

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The test gas chamber is designed with a segmented structure featuring a defined opening rather than a completely closed chamber. This segmentation allows controlled gas flow through the functional layer while minimizing unnecessary diffusion paths and losses.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention extracts the essential function of gas flow measurement while removing the harmful aspect of enclosed diffusion. By using an open chamber design with a defined opening, it takes out the gas flow measurement capability while eliminating the diffusion losses associated with closed chambers.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If the test gas chamber opening width is fixed, then the device structure is simple, but it cannot adapt to different functional layer widths

Engineering Contradiction:

Improveadaptability to different layer widthsVSAvoidtest gas chamber structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The test gas chamber incorporates a movable or adjustable opening width mechanism that can be dynamically adapted to match different functional layer widths. This dynamic adjustment capability allows the same device to work with various layer dimensions without requiring multiple fixed devices.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The test gas chamber is designed with universal adaptability through its adjustable opening, enabling a single device to perform measurements on functional layers of different widths. This multi-functional design eliminates the need for multiple specialized chambers for different layer sizes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables rapid, reliable detection of defects in functional layers by quantifying gas passage, minimizing diffusion losses and ensuring accurate identification of defects like holes or cracks without significant technical effort.

Implementation Method 1

conveying a predefined amount of test gas to a first surface of the functional layer, and quantitatively determining an amount of test gas that has passed through the functional layer

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS12540932B2Method of analyzing a functional layer of an electrochemical cell or an electrochemical sensor application

Publication Date: 2026.02.03 GREENERITY GMBH

AI summary

A method of analyzing a functional layer of an electrochemical cell or an electrochemical sensor application includes conveying a predefined amount of test gas to a first surface of the functional layer, and quantitatively determining an amount of test gas that has passed through the functional layer using a detection unit located on a second surface of the functional layer, which second surface is opposite the first surface of the functional layer, wherein the test gas conveyed to the first surface of the functional layer is provided in a test gas chamber arranged on the first surface of the functional layer, characterized in that the test gas chamber is open towards the first surface of the functional layer and has an opening which has a defined length in the longitudinal direction (X) of the functional layer and a variably adjustable width in the transverse direction (Z).