Fuel Cell Case Ventilation Cover with Projection Barrier
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Solution Overview
Problem
Existing fuel cell case designs do not effectively prevent elongated materials, such as wires, from entering and contacting high-voltage components, while also requiring cost reduction, resource conservation, and simplified manufacturing.
Innovation Solution
A fuel cell case with a ventilation cover featuring a frame body, a louver with separated blades, and a projection protruding outward from the inner peripheral portion, which restricts the insertable direction of elongated materials and includes a waterproof, gas-permeable membrane to prevent water and foreign substances from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a louver with separated blades is used for ventilation, then ventilation function is improved and rainwater/flying stones are prevented from entering, but elongated materials such as wire can still enter through clearances and contact high-voltage components
Solution Approach 1:
The invention adds a third dimensional element (protrusion) to the traditional two-dimensional louver structure. The protrusion extends from the louver blade toward the opening, creating a three-dimensional barrier that blocks elongated materials from reaching high-voltage components while maintaining the ventilation function through the separated blades.
Solution Approach 2:
The ventilation cover is segmented into multiple functional elements: the frame body, the louver with separated blades, and the protrusion. This segmentation allows each element to perform its specific function - the blades block larger objects while the protrusion specifically targets elongated materials, creating a multi-layered defense system.
2Reliability
If additional protective structures are added to prevent elongated material intrusion, then safety is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The protrusion is merged with the louver blade structure, forming an integrated component rather than a separate part. This merging reduces the number of components, simplifies assembly, and lowers manufacturing complexity while maintaining the enhanced protection function against elongated materials.
3Productivity
If the louver blades are arranged to be separated to allow ventilation, then gas flow is improved, but clearances between blades create pathways for elongated materials to enter
Solution Approach 1:
The protrusion adds a third-dimensional barrier that extends from the louver blades into the opening space. This creates a multi-dimensional blocking effect that prevents elongated materials from passing through the clearances between blades, while the blades themselves remain separated to maintain ventilation 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
The solution reduces the likelihood of elongated materials contacting high-voltage components, ensures ventilation, and facilitates cost-effective, resource-efficient manufacturing by restricting the insertable direction of elongated materials and preventing water invasion.
Implementation Method 1
a waterproof, gas-permeable membrane that is located in the opening
Implementation Method 2
a waterproof, gas-permeable membrane that is located in the opening
Data Source
AI summary
A fuel cell case containing a fuel cell stack includes a side face that has an opening for ventilation; a frame body that is located outside of the case along the periphery of the opening; and a louver that is fixed to inside of the frame body. The louver has a plurality of blades arranged to be separated from one another. The fuel cell case also has a projection that is protruded outward of the case in a predetermined range including at least a region located on a gas blow direction side of the louver in an inner peripheral portion of the frame body. This configuration reduces the likelihood that an elongated material such as wire comes into contact with a high-voltage component relevant to the fuel cell inside of the case.