Fuel Cell Flat-Component Weld Overlap for Leak-Tight Joints
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Solution Overview
Problem
Existing fuel-cell devices face challenges in achieving efficient and cost-effective connections between flat components, particularly in terms of fluid-tightness and electrical conductivity, while minimizing production rejects and leakage risks.
Innovation Solution
A weld seam design where at least two portions of the weld seam overlap partially along the contour, with overlapping portions running slightly obliquely and forming a continuous, fluid-tight connection, compensating for seam irregularities and enhancing electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional weld seam design is used without overlapping portions, then the welding process is simpler and faster, but fluid-tightness and electrical conductivity are compromised due to seam irregularities and potential leakage
Solution Approach 1:
The invention transitions from a linear weld seam to an overlapping weld seam structure where portions of the weld seam extend beyond the immediate joint line. This dimensional extension creates multiple overlapping portions that compensate for irregularities and ensure fluid-tightness, resolving the contradiction between reliability and structural complexity.
Solution Approach 2:
The overlapping portions are designed to extend beyond the joint line in advance, creating a buffer zone that compensates for potential seam irregularities before they can cause leakage. This preliminary extension ensures fluid-tightness is achieved even with variations in welding quality.
2Reliability
If traditional weld seam design is used without overlapping portions, then production is faster with fewer steps, but electrical conductivity between flat components is reduced
Solution Approach 1:
The overlapping weld seam structure extends the conductive path beyond the immediate joint, creating multiple overlapping portions that ensure continuous electrical contact. This dimensional extension compensates for irregularities and maintains high electrical conductivity, resolving the contradiction between reliability and productivity.
3Reliability
If overlapping portions are added to the weld seam, then fluid-tightness and electrical conductivity are improved, but the welding process becomes more complex and time-consuming
Solution Approach 1:
The overlapping weld seam structure extends the weld beyond the immediate joint line, creating multiple overlapping portions that improve connection quality. While this increases structural complexity, it provides a buffer against irregularities and ensures reliable fluid-tightness and electrical conductivity.
4Reliability
If overlapping portions are added to the weld seam, then leakage risk is reduced, but production time and manufacturing complexity increase
Solution Approach 1:
The overlapping portions are designed to extend beyond the joint line in advance, creating a buffer zone that prevents leakage before it can occur. This preliminary extension ensures reliability is improved without requiring additional welding steps, thus maintaining production efficiency.
Solution Approach 2:
The invention changes the geometric parameters of the weld seam by extending portions beyond the immediate joint line. This parameter change creates overlapping regions that improve leakage prevention while the extension is achieved within the existing welding process parameters, maintaining production efficiency.
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 design improves the functionality and efficiency of fuel-cell devices by reducing leakage risks and production rejects, while allowing for more reliable and uniform connections between flat components.
Implementation Method 1
at least two flat components are welded together by at least one weld seam running along a weld contour
Data Source
AI summary
The aim of the invention is to improve an arrangement which comprises several flat components in particular for a fuel-cell device, wherein at least two flat components are welded together by means of at least one weld seam that extends along a weld contour. According to the invention, in at least one weld seam, at least two partial weld seam portions at least partially overlap in a region of overlap along the weld contour.