Electrochemical Component Sealing Beads for Precise Elastomer Deposition
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Solution Overview
Problem
The existing methods for manufacturing components for electrochemical systems, particularly bipolar plates, face challenges in achieving precise and accurate application of elastomeric sealing elements due to the narrow process window for optimizing coating material viscosity and application parameters, leading to potential leakage and defective components.
Innovation Solution
A method involving a metallic layer with sealing beads, where specific surface regions are treated with pulsed laser to create hydrophilic surface structurings, preventing the apolar liquid coating material from flowing onto undesired areas, thus ensuring precise application of elastomeric sealing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional coating methods are used to apply elastomeric sealing elements, then the coating process can be simplified, but the application precision deteriorates due to the narrow process window for optimizing coating material viscosity and application parameters
Solution Approach 1:
The sealing bead surface is pre-treated with a plasma process before coating, which creates a hydrophilic surface that provides better adhesion for the elastomeric sealing material. This preliminary surface modification enables more tolerant and precise coating application without requiring extremely tight control of coating parameters
Solution Approach 2:
The patent changes the surface energy parameters of the sealing bead by applying a plasma treatment, which modifies the wettability of the surface. This parameter change allows the coating material to spread and adhere more uniformly, improving application precision while maintaining ease of manufacture
2Ease of operation
If coating material viscosity is reduced to improve flow and coverage, then the coating becomes easier to apply, but the material flows onto undesired areas causing leakage and defects
Solution Approach 1:
The sealing bead surface is treated with plasma only in specific regions where enhanced adhesion is needed, creating local zones of hydrophilic character. This localized surface modification allows the coating material to flow freely for easy application while preventing it from migrating to areas where it should not go, maintaining sealing integrity
Solution Approach 2:
The plasma-treated surface acts as an intermediary layer between the sealing bead substrate and the elastomeric coating material. This intermediate surface layer controls the interaction between the two, enabling good flow characteristics while preventing unwanted spreading through the modified surface energy properties
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 method enables a more accurate and precise application of elastomeric sealing elements, preventing leakage and ensuring the quality of the components, even with low-viscosity coating materials, and allows for thicker sealing elements and improved system design.
Implementation Method 1
each of at least two first surface regions of the at least one sealing bead is subjected to at least one laser treatment, in which the at least two first surface regions are irradiated by means of a pulsed laser with laser pulses which have a pulse duration of less than 1 ns, wherein the at least one laser treatment produces surface structurings
Implementation Method 2
creating hydrophilic surface structurings, preventing the apolar liquid coating material from flowing onto undesired areas
Data Source
AI summary
The present disclosure relates to a method of manufacturing a component for an electrochemical system. The method comprises steps in which at least one metallic layer with at least one sealing bead formed therein is provided, each of at least two first surface regions of the at least one sealing bead are subjected to at least one laser treatment, and each of at least one second surface region of the at least one sealing bead, which is arranged between the at least two first surface regions and directly adjoins the at least two first surface regions, is provided with at least one elastomeric sealing element. In addition, the present disclosure also relates to a component for an electrochemical system and an electrochemical system comprising the component.