Spring Plate Assembly for Electrolyzer Stack Sealing

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Solution Overview

Problem

Existing electrolyzer stacks face challenges with hydrogen leakage and reduced electrolysis effectiveness due to swelling, thermal expansion, and high pressures, which are exacerbated by the additional hardware required to counter dimensional changes.

Innovation Solution

The use of a spring plate assembly with spring plates having perimeter sections, bridge sections, and spring elements that apply a compressive force to the cell block, counteracting the pressure increases and dimensional changes within the electrolyzer stack.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional hardware is added to counter dimensional changes, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveprevention of hydrogen leakageVSAvoidhardware complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The spring plate assembly utilizes the pressure differential generated during electrolysis operation itself to maintain sealing force. The higher pressure in the anode compartment automatically compresses the spring plate against the cell block, creating a self-regulating sealing mechanism that does not require external actuators or complex control systems.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The spring plate acts as an intermediary element between the anode and cathode compartments, transferring the pressure differential into mechanical sealing force. This intermediate component simplifies the overall system by providing a direct mechanical solution rather than requiring complex hydraulic or pneumatic systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If spring plate assembly is used to maintain sealing pressure, then hydrogen leakage is reduced, but weight of the electrolyzer stack increases

Engineering Contradiction:

Improvesealing effectivenessVSAvoidelectrolyzer stack weight

Core Design Contradiction:

ReliabilityVSWeight of stationary object

Solution Approach 1:

The spring plate assembly changes the pressure parameter distribution within the stack, using the existing pressure differential to generate sealing force. This approach leverages operational parameters rather than adding heavy structural components, maintaining sealing effectiveness while minimizing weight increase.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The spring plate is designed as a thin, flexible component that can deform under pressure to maintain sealing contact. This flexible design provides effective sealing with minimal material mass, significantly reducing the weight penalty compared to rigid sealing systems.

Inventive Principle:

Principle #30Flexible shells and thin films

3Adaptability or versatility

If spring elements are added to the plate structure, then adaptability to pressure changes is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveresponse to pressure increasesVSAvoidplate assembly manufacturing

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The spring plate assembly is segmented into multiple identical plate units, each with integrated spring elements. This modular segmentation allows for standardized manufacturing of individual plates that can be assembled in sequence, reducing overall manufacturing complexity while maintaining adaptability to pressure changes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The spring elements are merged directly into the plate structure during manufacturing, creating an integrated component rather than assembling separate parts. This merging simplifies the manufacturing process by reducing the number of assembly steps while providing the necessary elastic response to pressure variations.

Inventive Principle:

Principle #5Merging (Combining)

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

This solution effectively reduces hydrogen leakage and enhances electrolysis effectiveness by maintaining a stable stack force and sealing pressure, while minimizing the complexity and weight of the electrolyzer stack.

Implementation Method 1

a spring plate assembly with spring plates having perimeter sections, bridge sections, and spring elements that apply a compressive force to the cell block

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

An electrolyzer is an electrochemical device that converts water into hydrogen and oxygen using the process of electrolysis

Methodology Applied

Scientific EffectElectrolysis: Electrolysis

Data Source

PatentUS20250129492A1Electrolyzer stacks, electrolysis systems, and methods for operating electrolysis systems

Publication Date: 2025.04.24 GM GLOBAL TECHNOLOGY OPERATIONS LLC

AI summary

A spring plate assembly. The assembly includes spring plates with each of the spring plates having a perimeter section extending in a first plane, at least one bridge section extending from a first portion of the perimeter section to a second portion of the perimeter section, and spring elements that extend from the at least one bridge section. A first pair of adjacent spring plates are configured to engage a corresponding one of the perimeter sections when stacked in a first configuration and the first pair of adjacent spring plates are configured to engage a corresponding one of the plurality of spring elements when stacked in a second configuration.