Fastenerless Fuel Cell Stack Enclosure with Adjustable Clamping
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Solution Overview
Problem
Existing fuel cell enclosures require precise sizing to fit the varying length and height of fuel cell stacks due to manufacturing tolerances, making it challenging to protect them from weather elements without using large, custom-designed enclosures with fasteners.
Innovation Solution
A modular enclosure system comprising an upper and lower cover with clamping bars that secure without fasteners, accommodating fuel cell stacks of varying lengths by using flanged features and seals to create a waterproof, dustproof, and moistureproof environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pre-fabricated weatherproof enclosure is used to protect the fuel cell stack, then the fuel cell stack is protected from weather elements, but the enclosure cannot accommodate length variations due to manufacturing tolerances
Solution Approach 1:
The enclosure transitions from a rigid, fixed-size structure to a dynamic, adjustable structure. The clamping mechanism with movable clamping members allows the enclosure to adapt its internal dimensions to accommodate fuel cell stacks of varying lengths while maintaining weatherproof protection.
Solution Approach 2:
The enclosure uses adjustable clamping members that can be positioned at different locations along the enclosure body, changing the effective parameters (internal length) of the enclosure to match the specific fuel cell stack being protected, thereby accommodating manufacturing tolerances.
2Manufacturing precision
If a custom-designed enclosure is manufactured to precisely fit the fuel cell stack, then the enclosure fits perfectly, but the manufacturing complexity and cost increase
Solution Approach 1:
The enclosure is designed as a universal structure that can protect multiple fuel cell stack configurations. The adjustable clamping mechanism allows a single enclosure design to accommodate various stack lengths, eliminating the need for custom-designed enclosures for each specific stack.
Solution Approach 2:
The enclosure is divided into a stationary enclosure body and movable clamping members. This segmentation allows the fixed structural components to be standardized while the adjustable clamping members handle the adaptation to different stack dimensions, simplifying overall manufacturing.
3Strength
If fasteners are used to secure the enclosure cover, then the enclosure is firmly secured, but the assembly and disassembly process becomes time-consuming
Solution Approach 1:
The clamping mechanism uses movable clamping members that can be quickly adjusted and secured without traditional fasteners. This dynamic system allows for rapid assembly and disassembly while maintaining firm security through the clamping force applied to the fuel cell stack.
Solution Approach 2:
The traditional mechanical fastening system (screws, bolts, nuts) is replaced with a clamping system that uses direct mechanical pressure through adjustable clamping members. This substitution eliminates the time-consuming process of threading and tightening fasteners while maintaining secure enclosure closure.
Data Source
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AI summary
The present disclosure generally relates to a fuel cell stack enclosure adapted to enclose a fuel cell stack The fuel cell stack enclosure includes an upper cover, a lower cover, and one or more clamping means. The upper cover encloses an upper section of the fuel cell stack and the lower cover encloses a lower section of the fuel cell stack.