Thin Electrolyzer Cell Frame With Open Channels and Welded Sealing

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Solution Overview

Problem

Conventional electrolyzer frames require thicker materials to maintain mechanical robustness, limiting design flexibility and increasing space requirements, while conventional designs with embedded channels are difficult to adjust for fluid and electrical distribution.

Innovation Solution

A thin cell frame with open channels and a bipolar plate integrated into a single-piece structure, allowing for flexible channel geometry and efficient sealing without additional components, reducing thickness and space requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional electrolyzer frames use thicker materials to maintain mechanical robustness, then structural strength is improved, but space requirements and device complexity increase

Engineering Contradiction:

Improvemechanical robustnessVSAvoidspace requirements

Core Design Contradiction:

StrengthVSVolume of moving object

Solution Approach 1:

The patent combines the frame structure with integrated open channels and bipolar plate sealing into a single unified component. This merging eliminates the need for separate embedded channels and additional sealing components, achieving mechanical robustness through the integrated structure itself rather than through thickness alone, thereby reducing overall space requirements while maintaining structural integrity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent transitions from conventional embedded channels within the frame thickness to open channels formed on the surface of the frame. This dimensional change allows the channels to be formed in a different spatial arrangement, enabling the frame to maintain mechanical strength with reduced thickness while providing adequate fluid distribution pathways through the open surface geometry.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If conventional designs use embedded channels within the frame, then fluid distribution is achieved, but design flexibility and ease of adjustment are reduced

Engineering Contradiction:

Improvedesign flexibilityVSAvoidchannel geometry adjustment

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the channels from being embedded within the frame material and positions them as open channels on the frame surface. This extraction allows for easier modification and adjustment of channel geometry without requiring complex internal reconfiguration, significantly improving design flexibility while reducing the complexity of manufacturing and adjusting the fluid distribution system.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If conventional frames require additional components for sealing and channel formation, then functional requirements are met, but the number of components and assembly complexity increase

Engineering Contradiction:

Improvesealing effectivenessVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the sealing function directly into the frame structure itself, where the frame's integrated design with open channels and bipolar plate configuration provides inherent sealing capability. This eliminates the need for separate sealing components while maintaining reliable sealing effectiveness, thereby reducing the total number of components and simplifying assembly procedures.

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

Enhances mechanical robustness, improves fluid and electrical distribution, and reduces the number of components needed, leading to more efficient hydrogen production with a smaller spatial footprint.

Implementation Method 1

a bipolar plate formed from a polymer material, the bipolar plate being arranged so as to seal the open channel

Methodology Applied

Scientific EffectSealing:

Implementation Method 2

the bipolar plate being welded to the frame

Methodology Applied

Scientific EffectWelding: Welding

Data Source

PatentEP4686773A1Thin cell frame with open channels for a hydrogen electrolyzer, stack of such cell frame, and electrolyzer comprising such stack

Publication Date: 2026.02.04 JOHN COCKERILL HYDROGEN FRANCE

Figure 1~2
Figure 3~4(B)
Figure 5(A)~6

AI summary

A frame assembly (Fr.Ass) comprising a frame (TF) configured to be integrated in a stack of frames of an electrolyzer, the frame comprising a central opening (CentOp), a first through opening (In2, Out2), a top surface (Top) and a bottom surface (Bot) opposed to the top surface (Top), the frame further comprising an open channel (OpCh) on the bottom surface (Bot), the frame assembly comprising a bipolar plate (BP) formed from a polymer material, the bipolar plate being arranged so as to seal the open channel (OpChan), the bipolar plate being welded to the frame (TF).