Separator Plate Elastomeric Molding for Electrolyzer Sealing
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Solution Overview
Problem
The existing manufacturing processes for separator plates in electrolyzers are complex and costly due to the need for embossed media guiding structures and sealing beads, which require intricate tooling and compensation for material springback, making it difficult to form both sealing lips and media guiding structures in the same area effectively.
Innovation Solution
The separator plate features an elastomeric molding with sealing lips surrounding through-openings on one side and ribs and grooves on the other side to guide fluids, eliminating the need for embossed structures and allowing for a simpler, more cost-effective manufacturing process by using a single injection molding step to form both sealings and media guiding structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If embossed structures and sealing beads are formed separately on separator plates, then sealing and media guiding functions are achieved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent combines the sealing bead formation and media guiding structure formation into a single injection molding process. The elastomeric material is injected to form both the sealing bead that seals the through-opening and the media guiding structures that direct fluid flow, eliminating the need for separate embossing and bead formation steps. This integration directly resolves the technical contradiction by maintaining reliable sealing while dramatically reducing manufacturing complexity.
Solution Approach 2:
The elastomeric molding serves multiple functions simultaneously: it provides sealing against the through-opening, creates media guiding structures for fluid distribution, and forms a durable interface between the separator plate and adjacent components. This multi-functionality allows a single structural element to replace what previously required multiple separate manufacturing steps and components.
2Reliability
If intricate tooling is used for embossed structures and sealing beads, then both sealing and media guiding are achieved, but production cost increases
Solution Approach 1:
The injection molding process consolidates multiple manufacturing operations into a single step. Instead of requiring separate tooling for embossing media guiding structures and separate tooling for forming sealing beads, the invention uses one injection mold that forms both features simultaneously. This directly reduces production cost while maintaining the reliability of both sealing and fluid guidance functions.
3Manufacturing precision
If material springback is compensated for in embossed contours, then manufacturing precision is improved, but tool complexity and manufacturing time increase
Solution Approach 1:
The invention replaces the mechanical embossing process with an injection molding process. Instead of mechanically pressing embossed structures that require springback compensation, the elastomeric material is injected and molded to the desired contour. The molding process inherently captures the final shape without the elastic recovery issues that plague mechanical forming, eliminating the need for complex compensation calculations and iterative adjustments.
4Adaptability or versatility
If separate structures for sealing and media guiding are formed in the same area, then both functions are achieved, but manufacturing difficulty increases
Solution Approach 1:
The injection molding process enables the formation of both sealing beads and media guiding structures in the same operational step and same physical area of the separator plate. The elastomeric material is injected to simultaneously create the sealing interface around the through-opening and the media guiding channels that extend from it, making the manufacturing of integrated multi-functional structures straightforward rather than difficult.
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 approach simplifies the manufacturing process, reduces material overmolding, and provides a reliable seal and efficient fluid guidance, lowering production costs and complexity while maintaining effective sealing and fluid distribution.
Implementation Method 1
an elastomeric molding with a sealing lip surrounding the through-opening at least partially, which sealing lip extends at least partially along the peripheral edge of the through-opening
Data Source
AI summary
The present disclosure relates to a separator plate for an electrolyzer having a first layer with at least one through-opening for a fluid and an active region with a set of flow channels for the fluid. A first elastomeric molding with at least one sealing lip is arranged on a first side of the first layer at least partially surrounding the through-opening. The sealing lip extends at least partially along a peripheral edge of the through-opening. A second elastomeric molding surrounding the through-opening is arranged on a second side of the first layer, with a set of ribs which form grooves between them as flow channels for the fluid. For each flow channel, one longitudinal end is open to the through-opening and the other is open to the active region. The first layer has a cranked region at a distance from the through-opening and at least partially around the through-opening.