Separator Plate Holding Structure to Prevent MEA Damage

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Solution Overview

Problem

In electrochemical systems, such as fuel cells and electrolyzers, the embossed holding structures on separator plates can damage the membrane electrode assembly (MEA) during compression or when inserting connector pins, leading to mechanical instability and potential system failure.

Innovation Solution

A separator plate design featuring a holding structure with a clamping region and a receiving region, where the individual plates are spaced apart to allow for the insertion of connector pins, with the first individual plate extending concavely in the receiving region to prevent edge contact with the MEA, reducing the risk of damage and enhancing mechanical stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If embossed holding structures are used on separator plates to hold connector pins, then reliable electrical contacting and secure holding of connector pins is achieved, but the membrane electrode assembly (MEA) is damaged during compression or insertion

Engineering Contradiction:

Improveelectrical contacting reliabilityVSAvoidMEA damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The holding structure is divided into two separate individual plates instead of a single embossed structure. This segmentation allows the plates to be spaced apart, creating a gap that prevents the MEA from being pinched or damaged while still providing secure holding of the connector pin through the clamping region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The receiving region acts as an intermediary space between the outer edge and the clamping region. This intermediate zone with its spring-like behavior absorbs compression forces and prevents direct transmission of damaging forces to the MEA, while still allowing the connector pin to be securely held.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If individual plates are spaced apart to allow connector pin insertion, then MEA damage is prevented, but structural complexity increases

Engineering Contradiction:

ImproveMEA damage preventionVSAvoidholding structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The two individual plates are connected to each other through connection structures, merging them into a single integrated holding structure. This reduces the overall structural complexity compared to using completely separate components, while maintaining the spacing benefit for MEA protection.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The holding structure serves multiple functions: it holds the connector pin securely in the clamping region, provides a spring-like buffer in the receiving region to protect the MEA, and maintains structural integrity through the connection structures. This multi-functionality reduces the need for additional separate protective components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the first individual plate extends concavely in the receiving region, then edge contact with MEA is prevented, but manufacturing complexity increases

Engineering Contradiction:

Improveedge contact preventionVSAvoidplate forming complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The first individual plate is formed with a concave curvature in the receiving region instead of a flat or embossed surface. This curved geometry naturally directs the edge away from the MEA during compression, preventing edge contact damage. The curvature can be achieved through standard forming processes and provides inherent protection without requiring additional components.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS20240178412A1Separator plate having a holding structure for a connector pin

Publication Date: 2024.05.30 REINZ DICHTUNGS G M B H

AI summary

A separator plate for an electrochemical system. The separator plate comprising a first individual plate, a second individual plate, and a holding structure. The individual plates are spaced apart from each other in the region of the holding structure, so that the connector pin can be inserted into the holding structure. The holding structure has a clamping region and a receiving region. The clamping region can clamp the connector pin between its individual plates. The receiving region starts from the outer edge and is arranged upstream of the clamping region in the direction of insertion. At least in a non-compressed state of the separator plate, at least the first individual plate extends in a concave manner along the direction of insertion in the receiving region, so that an edge of the first individual plate is directed towards the separator plate plane in the receiving region.