Fuel Cell Voltage Terminal with Anti-Displacement Separator
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Solution Overview
Problem
In fuel cell stacks, external forces and vibrations can cause separators to displace, leading to inaccurate voltage measurements due to deformation or detachment of terminals connected to the separator assembly.
Innovation Solution
A fuel cell design where a separator assembly of laminated plates, secured by methods like brazing or welding, includes a terminal connecting portion with protrusions and engaging features to prevent plate displacement and secure the terminal, reducing contact resistance and increasing frictional resistance to maintain accurate voltage measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a terminal for measuring voltage is connected to the separator assembly, then voltage measurement capability is provided, but external force or vibrations cause plate displacement leading to terminal deformation or detachment
Solution Approach 1:
The terminal connecting portion is formed by integrating multiple plates (first plate, second plate, and third plate) into a unified structure. The protrusions from each plate are positioned to collectively form the terminal connecting portion, merging the mechanical strength of multiple plates to securely hold the terminal and prevent displacement under external force.
Solution Approach 2:
The separator assembly is divided into multiple discrete plates (first plate, second plate, third plate) that can be independently manufactured and assembled. Each plate contributes specific features (protrusions, openings) that collectively form the terminal connecting portion, allowing modular construction while maintaining overall structural integrity.
2Reliability
If plates are secured to each other to prevent displacement, then terminal stability is improved, but manufacturing complexity increases
Solution Approach 1:
The protrusions are formed on the plates during the plate manufacturing process itself, before assembly. This preliminary formation of structural features eliminates the need for additional post-assembly operations to create the terminal connecting portion, simplifying the overall manufacturing process while ensuring precise plate positioning.
Solution Approach 2:
Multiple functional features (protrusions for forming the terminal connecting portion, openings for engaging the terminal) are integrated into the plate structures during manufacturing. This merging of multiple features into single components reduces the total number of parts and assembly steps required.
Data Source
AI summary
A fuel cell includes a separator assembly in which a plurality of plates are laminated on each other and adjacent ones of the plates are secured to each other such that external force does not cause displacement of the plates relative to each other, a terminal used for detecting voltage, and a terminal connecting portion provided in the separator assembly for connecting the terminal to the separator assembly.